./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 6497de01 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d028fee2-1ae5-4220-8d8e-d4e78722bf3f/bin/uautomizer-verify-LYvppIcaGC/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d028fee2-1ae5-4220-8d8e-d4e78722bf3f/bin/uautomizer-verify-LYvppIcaGC/plugins/org.eclipse.equinox.launcher_1.6.800.v20240513-1750.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d028fee2-1ae5-4220-8d8e-d4e78722bf3f/bin/uautomizer-verify-LYvppIcaGC/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d028fee2-1ae5-4220-8d8e-d4e78722bf3f/bin/uautomizer-verify-LYvppIcaGC/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_d028fee2-1ae5-4220-8d8e-d4e78722bf3f/bin/uautomizer-verify-LYvppIcaGC/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d028fee2-1ae5-4220-8d8e-d4e78722bf3f/bin/uautomizer-verify-LYvppIcaGC --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 52e7e3a0d80d0519558794c69b54bf5c07c5549c1d780651d891121aff50735c --- Real Ultimate output --- This is Ultimate 0.3.0-dev-6497de0 [2024-11-23 18:43:20,179 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-23 18:43:20,286 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d028fee2-1ae5-4220-8d8e-d4e78722bf3f/bin/uautomizer-verify-LYvppIcaGC/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-11-23 18:43:20,293 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-23 18:43:20,293 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-23 18:43:20,336 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-23 18:43:20,337 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-23 18:43:20,337 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-23 18:43:20,338 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-23 18:43:20,338 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-23 18:43:20,339 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-23 18:43:20,340 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-23 18:43:20,340 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-23 18:43:20,340 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-23 18:43:20,341 INFO L153 SettingsManager]: * Use SBE=true [2024-11-23 18:43:20,341 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-23 18:43:20,341 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-23 18:43:20,341 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-23 18:43:20,341 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-23 18:43:20,341 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-23 18:43:20,342 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-23 18:43:20,342 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-23 18:43:20,342 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-23 18:43:20,343 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-23 18:43:20,343 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-23 18:43:20,343 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-23 18:43:20,343 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2024-11-23 18:43:20,343 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-23 18:43:20,343 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2024-11-23 18:43:20,343 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-23 18:43:20,344 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-23 18:43:20,344 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-23 18:43:20,344 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-23 18:43:20,344 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-23 18:43:20,344 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-23 18:43:20,344 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-23 18:43:20,344 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-23 18:43:20,344 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-23 18:43:20,344 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-23 18:43:20,344 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-23 18:43:20,344 INFO L153 SettingsManager]: * Compute procedure contracts=false [2024-11-23 18:43:20,344 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-23 18:43:20,345 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-23 18:43:20,345 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-23 18:43:20,346 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-23 18:43:20,346 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-23 18:43:20,346 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-23 18:43:20,346 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-23 18:43:20,346 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_d028fee2-1ae5-4220-8d8e-d4e78722bf3f/bin/uautomizer-verify-LYvppIcaGC Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 52e7e3a0d80d0519558794c69b54bf5c07c5549c1d780651d891121aff50735c [2024-11-23 18:43:20,696 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-23 18:43:20,706 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-23 18:43:20,711 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-23 18:43:20,713 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-23 18:43:20,713 INFO L274 PluginConnector]: CDTParser initialized [2024-11-23 18:43:20,715 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d028fee2-1ae5-4220-8d8e-d4e78722bf3f/bin/uautomizer-verify-LYvppIcaGC/../../sv-benchmarks/c/combinations/square_4+soft_float_3a.c.cil.c [2024-11-23 18:43:23,747 INFO L533 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d028fee2-1ae5-4220-8d8e-d4e78722bf3f/bin/uautomizer-verify-LYvppIcaGC/data/085410618/5883f7c2272144afa6d9bd0f442becc3/FLAGe33f69452 [2024-11-23 18:43:24,058 INFO L384 CDTParser]: Found 1 translation units. [2024-11-23 18:43:24,059 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d028fee2-1ae5-4220-8d8e-d4e78722bf3f/sv-benchmarks/c/combinations/square_4+soft_float_3a.c.cil.c [2024-11-23 18:43:24,069 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d028fee2-1ae5-4220-8d8e-d4e78722bf3f/bin/uautomizer-verify-LYvppIcaGC/data/085410618/5883f7c2272144afa6d9bd0f442becc3/FLAGe33f69452 [2024-11-23 18:43:24,085 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d028fee2-1ae5-4220-8d8e-d4e78722bf3f/bin/uautomizer-verify-LYvppIcaGC/data/085410618/5883f7c2272144afa6d9bd0f442becc3 [2024-11-23 18:43:24,088 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-23 18:43:24,089 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-23 18:43:24,091 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-23 18:43:24,091 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-23 18:43:24,096 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-23 18:43:24,097 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 06:43:24" (1/1) ... [2024-11-23 18:43:24,098 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@b11a2b6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 06:43:24, skipping insertion in model container [2024-11-23 18:43:24,099 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 06:43:24" (1/1) ... [2024-11-23 18:43:24,122 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-23 18:43:24,317 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_d028fee2-1ae5-4220-8d8e-d4e78722bf3f/sv-benchmarks/c/combinations/square_4+soft_float_3a.c.cil.c[1999,2012] [2024-11-23 18:43:24,323 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_d028fee2-1ae5-4220-8d8e-d4e78722bf3f/sv-benchmarks/c/combinations/square_4+soft_float_3a.c.cil.c[2368,2381] [2024-11-23 18:43:24,407 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-23 18:43:24,420 INFO L200 MainTranslator]: Completed pre-run [2024-11-23 18:43:24,439 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_d028fee2-1ae5-4220-8d8e-d4e78722bf3f/sv-benchmarks/c/combinations/square_4+soft_float_3a.c.cil.c[1999,2012] [2024-11-23 18:43:24,442 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_d028fee2-1ae5-4220-8d8e-d4e78722bf3f/sv-benchmarks/c/combinations/square_4+soft_float_3a.c.cil.c[2368,2381] [2024-11-23 18:43:24,495 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-23 18:43:24,518 INFO L204 MainTranslator]: Completed translation [2024-11-23 18:43:24,520 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 06:43:24 WrapperNode [2024-11-23 18:43:24,521 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-23 18:43:24,522 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-23 18:43:24,524 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-23 18:43:24,524 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-23 18:43:24,535 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 06:43:24" (1/1) ... [2024-11-23 18:43:24,544 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 06:43:24" (1/1) ... [2024-11-23 18:43:24,582 INFO L138 Inliner]: procedures = 27, calls = 17, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 168 [2024-11-23 18:43:24,586 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-23 18:43:24,586 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-23 18:43:24,586 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-23 18:43:24,587 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-23 18:43:24,598 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 06:43:24" (1/1) ... [2024-11-23 18:43:24,598 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 06:43:24" (1/1) ... [2024-11-23 18:43:24,602 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 06:43:24" (1/1) ... [2024-11-23 18:43:24,634 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2024-11-23 18:43:24,638 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 06:43:24" (1/1) ... [2024-11-23 18:43:24,638 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 06:43:24" (1/1) ... [2024-11-23 18:43:24,647 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 06:43:24" (1/1) ... [2024-11-23 18:43:24,648 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 06:43:24" (1/1) ... [2024-11-23 18:43:24,657 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 06:43:24" (1/1) ... [2024-11-23 18:43:24,662 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 06:43:24" (1/1) ... [2024-11-23 18:43:24,663 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 06:43:24" (1/1) ... [2024-11-23 18:43:24,669 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-23 18:43:24,670 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-23 18:43:24,670 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-23 18:43:24,670 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-23 18:43:24,671 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 06:43:24" (1/1) ... [2024-11-23 18:43:24,678 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-23 18:43:24,692 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d028fee2-1ae5-4220-8d8e-d4e78722bf3f/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-23 18:43:24,707 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d028fee2-1ae5-4220-8d8e-d4e78722bf3f/bin/uautomizer-verify-LYvppIcaGC/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-11-23 18:43:24,714 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d028fee2-1ae5-4220-8d8e-d4e78722bf3f/bin/uautomizer-verify-LYvppIcaGC/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-11-23 18:43:24,739 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-23 18:43:24,739 INFO L130 BoogieDeclarations]: Found specification of procedure base2flt [2024-11-23 18:43:24,739 INFO L138 BoogieDeclarations]: Found implementation of procedure base2flt [2024-11-23 18:43:24,739 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-23 18:43:24,739 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-23 18:43:24,740 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-23 18:43:24,740 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2024-11-23 18:43:24,740 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2024-11-23 18:43:24,833 INFO L234 CfgBuilder]: Building ICFG [2024-11-23 18:43:24,835 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-23 18:43:25,252 INFO L? ?]: Removed 74 outVars from TransFormulas that were not future-live. [2024-11-23 18:43:25,252 INFO L283 CfgBuilder]: Performing block encoding [2024-11-23 18:43:25,263 INFO L307 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-23 18:43:25,263 INFO L312 CfgBuilder]: Removed 4 assume(true) statements. [2024-11-23 18:43:25,263 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 06:43:25 BoogieIcfgContainer [2024-11-23 18:43:25,264 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-23 18:43:25,268 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-23 18:43:25,268 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-23 18:43:25,275 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-23 18:43:25,275 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 06:43:24" (1/3) ... [2024-11-23 18:43:25,277 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6226a953 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 06:43:25, skipping insertion in model container [2024-11-23 18:43:25,277 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 06:43:24" (2/3) ... [2024-11-23 18:43:25,277 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6226a953 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 06:43:25, skipping insertion in model container [2024-11-23 18:43:25,277 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 06:43:25" (3/3) ... [2024-11-23 18:43:25,279 INFO L128 eAbstractionObserver]: Analyzing ICFG square_4+soft_float_3a.c.cil.c [2024-11-23 18:43:25,296 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-23 18:43:25,297 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. [2024-11-23 18:43:25,371 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-23 18:43:25,386 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;@6f9cb0a7, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-23 18:43:25,386 INFO L334 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2024-11-23 18:43:25,392 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) [2024-11-23 18:43:25,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2024-11-23 18:43:25,399 INFO L210 NwaCegarLoop]: Found error trace [2024-11-23 18:43:25,399 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-11-23 18:43:25,400 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-23 18:43:25,407 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 18:43:25,408 INFO L85 PathProgramCache]: Analyzing trace with hash 1530844763, now seen corresponding path program 1 times [2024-11-23 18:43:25,416 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 18:43:25,416 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1201630523] [2024-11-23 18:43:25,417 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 18:43:25,417 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 18:43:25,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 18:43:25,550 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-23 18:43:25,551 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 18:43:25,551 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1201630523] [2024-11-23 18:43:25,551 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1201630523] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-23 18:43:25,551 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-23 18:43:25,552 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-23 18:43:25,553 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [867687707] [2024-11-23 18:43:25,554 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-23 18:43:25,558 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-11-23 18:43:25,558 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-23 18:43:25,580 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-11-23 18:43:25,581 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-11-23 18:43:25,585 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) [2024-11-23 18:43:25,619 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-23 18:43:25,620 INFO L93 Difference]: Finished difference Result 157 states and 239 transitions. [2024-11-23 18:43:25,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-11-23 18:43:25,622 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2024-11-23 18:43:25,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-23 18:43:25,629 INFO L225 Difference]: With dead ends: 157 [2024-11-23 18:43:25,629 INFO L226 Difference]: Without dead ends: 72 [2024-11-23 18:43:25,633 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-11-23 18:43:25,636 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 [2024-11-23 18:43:25,637 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] [2024-11-23 18:43:25,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2024-11-23 18:43:25,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 72. [2024-11-23 18:43:25,684 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) [2024-11-23 18:43:25,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 101 transitions. [2024-11-23 18:43:25,691 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 101 transitions. Word has length 7 [2024-11-23 18:43:25,693 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-23 18:43:25,693 INFO L471 AbstractCegarLoop]: Abstraction has 72 states and 101 transitions. [2024-11-23 18:43:25,693 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 18:43:25,694 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 101 transitions. [2024-11-23 18:43:25,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2024-11-23 18:43:25,694 INFO L210 NwaCegarLoop]: Found error trace [2024-11-23 18:43:25,694 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-11-23 18:43:25,694 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-23 18:43:25,695 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-23 18:43:25,695 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 18:43:25,695 INFO L85 PathProgramCache]: Analyzing trace with hash 1530904345, now seen corresponding path program 1 times [2024-11-23 18:43:25,695 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 18:43:25,696 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2081628200] [2024-11-23 18:43:25,696 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 18:43:25,696 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 18:43:25,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-11-23 18:43:25,713 INFO L357 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-11-23 18:43:25,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-11-23 18:43:25,739 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2024-11-23 18:43:25,740 INFO L340 BasicCegarLoop]: Counterexample is feasible [2024-11-23 18:43:25,741 INFO L782 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (1 of 2 remaining) [2024-11-23 18:43:25,743 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2024-11-23 18:43:25,744 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-23 18:43:25,747 INFO L422 BasicCegarLoop]: Path program histogram: [1, 1] [2024-11-23 18:43:25,760 INFO L170 ceAbstractionStarter]: Computing trace abstraction results [2024-11-23 18:43:25,764 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.11 06:43:25 BoogieIcfgContainer [2024-11-23 18:43:25,765 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2024-11-23 18:43:25,765 INFO L112 PluginConnector]: ------------------------Witness Printer---------------------------- [2024-11-23 18:43:25,765 INFO L270 PluginConnector]: Initializing Witness Printer... [2024-11-23 18:43:25,766 INFO L274 PluginConnector]: Witness Printer initialized [2024-11-23 18:43:25,766 INFO L184 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 06:43:25" (3/4) ... [2024-11-23 18:43:25,769 INFO L149 WitnessPrinter]: No result that supports witness generation found [2024-11-23 18:43:25,770 INFO L131 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2024-11-23 18:43:25,771 INFO L158 Benchmark]: Toolchain (without parser) took 1682.18ms. Allocated memory is still 142.6MB. Free memory was 118.8MB in the beginning and 109.9MB in the end (delta: 9.0MB). Peak memory consumption was 5.5MB. Max. memory is 16.1GB. [2024-11-23 18:43:25,772 INFO L158 Benchmark]: CDTParser took 0.45ms. Allocated memory is still 142.6MB. Free memory is still 81.0MB. There was no memory consumed. Max. memory is 16.1GB. [2024-11-23 18:43:25,772 INFO L158 Benchmark]: CACSL2BoogieTranslator took 430.50ms. Allocated memory is still 142.6MB. Free memory was 118.6MB in the beginning and 104.5MB in the end (delta: 14.1MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. [2024-11-23 18:43:25,773 INFO L158 Benchmark]: Boogie Procedure Inliner took 64.06ms. Allocated memory is still 142.6MB. Free memory was 104.5MB in the beginning and 102.5MB in the end (delta: 2.0MB). There was no memory consumed. Max. memory is 16.1GB. [2024-11-23 18:43:25,773 INFO L158 Benchmark]: Boogie Preprocessor took 82.77ms. Allocated memory is still 142.6MB. Free memory was 102.5MB in the beginning and 100.5MB in the end (delta: 2.0MB). There was no memory consumed. Max. memory is 16.1GB. [2024-11-23 18:43:25,773 INFO L158 Benchmark]: RCFGBuilder took 593.96ms. Allocated memory is still 142.6MB. Free memory was 100.5MB in the beginning and 79.3MB in the end (delta: 21.2MB). Peak memory consumption was 25.2MB. Max. memory is 16.1GB. [2024-11-23 18:43:25,774 INFO L158 Benchmark]: TraceAbstraction took 497.04ms. Allocated memory is still 142.6MB. Free memory was 78.8MB in the beginning and 109.9MB in the end (delta: -31.1MB). There was no memory consumed. Max. memory is 16.1GB. [2024-11-23 18:43:25,774 INFO L158 Benchmark]: Witness Printer took 5.28ms. Allocated memory is still 142.6MB. Free memory was 109.9MB in the beginning and 109.9MB in the end (delta: 21.0kB). There was no memory consumed. Max. memory is 16.1GB. [2024-11-23 18:43:25,776 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.45ms. Allocated memory is still 142.6MB. Free memory is still 81.0MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 430.50ms. Allocated memory is still 142.6MB. Free memory was 118.6MB in the beginning and 104.5MB in the end (delta: 14.1MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 64.06ms. Allocated memory is still 142.6MB. Free memory was 104.5MB in the beginning and 102.5MB in the end (delta: 2.0MB). There was no memory consumed. Max. memory is 16.1GB. * Boogie Preprocessor took 82.77ms. Allocated memory is still 142.6MB. Free memory was 102.5MB in the beginning and 100.5MB in the end (delta: 2.0MB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 593.96ms. Allocated memory is still 142.6MB. Free memory was 100.5MB in the beginning and 79.3MB in the end (delta: 21.2MB). Peak memory consumption was 25.2MB. Max. memory is 16.1GB. * TraceAbstraction took 497.04ms. Allocated memory is still 142.6MB. Free memory was 78.8MB in the beginning and 109.9MB in the end (delta: -31.1MB). There was no memory consumed. Max. memory is 16.1GB. * Witness Printer took 5.28ms. Allocated memory is still 142.6MB. Free memory was 109.9MB in the beginning and 109.9MB in the end (delta: 21.0kB). There was no memory consumed. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - UnprovableResult [Line: 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: 0.4s, 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, 0.0s SatisfiabilityAnalysisTime, 0.0s InterpolantComputationTime, 14 NumberOfCodeBlocks, 14 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 6 ConstructedInterpolants, 0 QuantifiedInterpolants, 6 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 1 InterpolantComputations, 1 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available, ConComCheckerStatistics: No data available RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces [2024-11-23 18:43:25,799 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d028fee2-1ae5-4220-8d8e-d4e78722bf3f/bin/uautomizer-verify-LYvppIcaGC/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Ended with exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d028fee2-1ae5-4220-8d8e-d4e78722bf3f/bin/uautomizer-verify-LYvppIcaGC/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d028fee2-1ae5-4220-8d8e-d4e78722bf3f/bin/uautomizer-verify-LYvppIcaGC/plugins/org.eclipse.equinox.launcher_1.6.800.v20240513-1750.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d028fee2-1ae5-4220-8d8e-d4e78722bf3f/bin/uautomizer-verify-LYvppIcaGC/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d028fee2-1ae5-4220-8d8e-d4e78722bf3f/bin/uautomizer-verify-LYvppIcaGC/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_d028fee2-1ae5-4220-8d8e-d4e78722bf3f/bin/uautomizer-verify-LYvppIcaGC/config/svcomp-Reach-32bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d028fee2-1ae5-4220-8d8e-d4e78722bf3f/bin/uautomizer-verify-LYvppIcaGC --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 52e7e3a0d80d0519558794c69b54bf5c07c5549c1d780651d891121aff50735c --- Real Ultimate output --- This is Ultimate 0.3.0-dev-6497de0 [2024-11-23 18:43:28,644 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-23 18:43:28,780 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d028fee2-1ae5-4220-8d8e-d4e78722bf3f/bin/uautomizer-verify-LYvppIcaGC/config/svcomp-Reach-32bit-Automizer_Bitvector.epf [2024-11-23 18:43:28,787 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-23 18:43:28,787 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-23 18:43:28,822 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-23 18:43:28,823 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-23 18:43:28,823 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-23 18:43:28,824 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-23 18:43:28,824 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-23 18:43:28,825 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-23 18:43:28,826 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-23 18:43:28,826 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-23 18:43:28,827 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-23 18:43:28,827 INFO L153 SettingsManager]: * Use SBE=true [2024-11-23 18:43:28,827 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-23 18:43:28,828 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-23 18:43:28,828 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-23 18:43:28,828 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-23 18:43:28,828 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-23 18:43:28,828 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-23 18:43:28,829 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-23 18:43:28,829 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-23 18:43:28,829 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-11-23 18:43:28,829 INFO L153 SettingsManager]: * Use bitvectors instead of ints=true [2024-11-23 18:43:28,829 INFO L153 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2024-11-23 18:43:28,829 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-23 18:43:28,829 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-23 18:43:28,830 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2024-11-23 18:43:28,830 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-23 18:43:28,830 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2024-11-23 18:43:28,831 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-23 18:43:28,831 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-23 18:43:28,831 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-23 18:43:28,831 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-23 18:43:28,831 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-23 18:43:28,831 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-23 18:43:28,831 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-23 18:43:28,832 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-23 18:43:28,832 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-23 18:43:28,832 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-23 18:43:28,832 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-23 18:43:28,832 INFO L153 SettingsManager]: * Compute procedure contracts=false [2024-11-23 18:43:28,832 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-23 18:43:28,832 INFO L153 SettingsManager]: * Trace refinement strategy=FOX [2024-11-23 18:43:28,832 INFO L153 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2024-11-23 18:43:28,832 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-23 18:43:28,832 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-23 18:43:28,832 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-23 18:43:28,832 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-23 18:43:28,832 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_d028fee2-1ae5-4220-8d8e-d4e78722bf3f/bin/uautomizer-verify-LYvppIcaGC Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 52e7e3a0d80d0519558794c69b54bf5c07c5549c1d780651d891121aff50735c [2024-11-23 18:43:29,184 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-23 18:43:29,195 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-23 18:43:29,200 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-23 18:43:29,202 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-23 18:43:29,205 INFO L274 PluginConnector]: CDTParser initialized [2024-11-23 18:43:29,206 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d028fee2-1ae5-4220-8d8e-d4e78722bf3f/bin/uautomizer-verify-LYvppIcaGC/../../sv-benchmarks/c/combinations/square_4+soft_float_3a.c.cil.c [2024-11-23 18:43:32,239 INFO L533 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d028fee2-1ae5-4220-8d8e-d4e78722bf3f/bin/uautomizer-verify-LYvppIcaGC/data/d83c4f4d1/3143629fc2794e019aa74cca028c9ce7/FLAG7851523ca [2024-11-23 18:43:32,560 INFO L384 CDTParser]: Found 1 translation units. [2024-11-23 18:43:32,563 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d028fee2-1ae5-4220-8d8e-d4e78722bf3f/sv-benchmarks/c/combinations/square_4+soft_float_3a.c.cil.c [2024-11-23 18:43:32,580 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d028fee2-1ae5-4220-8d8e-d4e78722bf3f/bin/uautomizer-verify-LYvppIcaGC/data/d83c4f4d1/3143629fc2794e019aa74cca028c9ce7/FLAG7851523ca [2024-11-23 18:43:32,838 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d028fee2-1ae5-4220-8d8e-d4e78722bf3f/bin/uautomizer-verify-LYvppIcaGC/data/d83c4f4d1/3143629fc2794e019aa74cca028c9ce7 [2024-11-23 18:43:32,840 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-23 18:43:32,844 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-23 18:43:32,847 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-23 18:43:32,847 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-23 18:43:32,853 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-23 18:43:32,854 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 06:43:32" (1/1) ... [2024-11-23 18:43:32,857 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5c4ab3bb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 06:43:32, skipping insertion in model container [2024-11-23 18:43:32,857 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 06:43:32" (1/1) ... [2024-11-23 18:43:32,888 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-23 18:43:33,124 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_d028fee2-1ae5-4220-8d8e-d4e78722bf3f/sv-benchmarks/c/combinations/square_4+soft_float_3a.c.cil.c[1999,2012] [2024-11-23 18:43:33,135 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_d028fee2-1ae5-4220-8d8e-d4e78722bf3f/sv-benchmarks/c/combinations/square_4+soft_float_3a.c.cil.c[2368,2381] [2024-11-23 18:43:33,227 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-23 18:43:33,249 INFO L200 MainTranslator]: Completed pre-run [2024-11-23 18:43:33,269 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_d028fee2-1ae5-4220-8d8e-d4e78722bf3f/sv-benchmarks/c/combinations/square_4+soft_float_3a.c.cil.c[1999,2012] [2024-11-23 18:43:33,273 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_d028fee2-1ae5-4220-8d8e-d4e78722bf3f/sv-benchmarks/c/combinations/square_4+soft_float_3a.c.cil.c[2368,2381] [2024-11-23 18:43:33,306 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-23 18:43:33,325 INFO L204 MainTranslator]: Completed translation [2024-11-23 18:43:33,326 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 06:43:33 WrapperNode [2024-11-23 18:43:33,326 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-23 18:43:33,327 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-23 18:43:33,327 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-23 18:43:33,328 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-23 18:43:33,336 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 06:43:33" (1/1) ... [2024-11-23 18:43:33,348 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 06:43:33" (1/1) ... [2024-11-23 18:43:33,371 INFO L138 Inliner]: procedures = 28, calls = 17, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 132 [2024-11-23 18:43:33,371 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-23 18:43:33,372 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-23 18:43:33,372 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-23 18:43:33,372 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-23 18:43:33,382 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 06:43:33" (1/1) ... [2024-11-23 18:43:33,382 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 06:43:33" (1/1) ... [2024-11-23 18:43:33,387 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 06:43:33" (1/1) ... [2024-11-23 18:43:33,407 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2024-11-23 18:43:33,407 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 06:43:33" (1/1) ... [2024-11-23 18:43:33,407 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 06:43:33" (1/1) ... [2024-11-23 18:43:33,428 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 06:43:33" (1/1) ... [2024-11-23 18:43:33,429 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 06:43:33" (1/1) ... [2024-11-23 18:43:33,434 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 06:43:33" (1/1) ... [2024-11-23 18:43:33,436 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 06:43:33" (1/1) ... [2024-11-23 18:43:33,437 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 06:43:33" (1/1) ... [2024-11-23 18:43:33,441 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-23 18:43:33,442 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-23 18:43:33,442 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-23 18:43:33,442 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-23 18:43:33,443 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 06:43:33" (1/1) ... [2024-11-23 18:43:33,450 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-23 18:43:33,465 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d028fee2-1ae5-4220-8d8e-d4e78722bf3f/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-23 18:43:33,480 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d028fee2-1ae5-4220-8d8e-d4e78722bf3f/bin/uautomizer-verify-LYvppIcaGC/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-11-23 18:43:33,488 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d028fee2-1ae5-4220-8d8e-d4e78722bf3f/bin/uautomizer-verify-LYvppIcaGC/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-11-23 18:43:33,514 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-23 18:43:33,514 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1#0 [2024-11-23 18:43:33,514 INFO L130 BoogieDeclarations]: Found specification of procedure base2flt [2024-11-23 18:43:33,514 INFO L138 BoogieDeclarations]: Found implementation of procedure base2flt [2024-11-23 18:43:33,514 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-23 18:43:33,515 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-23 18:43:33,515 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2024-11-23 18:43:33,515 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2024-11-23 18:43:33,595 INFO L234 CfgBuilder]: Building ICFG [2024-11-23 18:43:33,597 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-23 18:43:38,236 INFO L? ?]: Removed 58 outVars from TransFormulas that were not future-live. [2024-11-23 18:43:38,236 INFO L283 CfgBuilder]: Performing block encoding [2024-11-23 18:43:38,248 INFO L307 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-23 18:43:38,248 INFO L312 CfgBuilder]: Removed 4 assume(true) statements. [2024-11-23 18:43:38,248 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 06:43:38 BoogieIcfgContainer [2024-11-23 18:43:38,249 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-23 18:43:38,251 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-23 18:43:38,252 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-23 18:43:38,257 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-23 18:43:38,257 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 06:43:32" (1/3) ... [2024-11-23 18:43:38,258 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3c0bda0d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 06:43:38, skipping insertion in model container [2024-11-23 18:43:38,258 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 06:43:33" (2/3) ... [2024-11-23 18:43:38,258 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3c0bda0d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 06:43:38, skipping insertion in model container [2024-11-23 18:43:38,259 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 06:43:38" (3/3) ... [2024-11-23 18:43:38,260 INFO L128 eAbstractionObserver]: Analyzing ICFG square_4+soft_float_3a.c.cil.c [2024-11-23 18:43:38,275 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-23 18:43:38,277 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. [2024-11-23 18:43:38,345 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-23 18:43:38,358 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;@562af9cc, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-23 18:43:38,358 INFO L334 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2024-11-23 18:43:38,362 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) [2024-11-23 18:43:38,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2024-11-23 18:43:38,368 INFO L210 NwaCegarLoop]: Found error trace [2024-11-23 18:43:38,368 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-11-23 18:43:38,369 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-23 18:43:38,374 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 18:43:38,374 INFO L85 PathProgramCache]: Analyzing trace with hash 78502818, now seen corresponding path program 1 times [2024-11-23 18:43:38,384 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-23 18:43:38,384 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1845480954] [2024-11-23 18:43:38,385 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 18:43:38,385 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-11-23 18:43:38,385 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d028fee2-1ae5-4220-8d8e-d4e78722bf3f/bin/uautomizer-verify-LYvppIcaGC/mathsat [2024-11-23 18:43:38,388 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d028fee2-1ae5-4220-8d8e-d4e78722bf3f/bin/uautomizer-verify-LYvppIcaGC/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2024-11-23 18:43:38,394 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d028fee2-1ae5-4220-8d8e-d4e78722bf3f/bin/uautomizer-verify-LYvppIcaGC/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2024-11-23 18:43:38,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 18:43:38,971 INFO L256 TraceCheckSpWp]: Trace formula consists of 20 conjuncts, 1 conjuncts are in the unsatisfiable core [2024-11-23 18:43:38,974 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-23 18:43:38,988 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-23 18:43:38,988 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-23 18:43:38,989 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-23 18:43:38,989 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1845480954] [2024-11-23 18:43:38,989 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1845480954] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-23 18:43:38,990 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-23 18:43:38,990 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-23 18:43:38,992 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [9666391] [2024-11-23 18:43:38,993 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-23 18:43:38,997 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-11-23 18:43:38,997 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-23 18:43:39,015 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-11-23 18:43:39,016 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-11-23 18:43:39,017 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) [2024-11-23 18:43:39,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-23 18:43:39,041 INFO L93 Difference]: Finished difference Result 111 states and 169 transitions. [2024-11-23 18:43:39,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-11-23 18:43:39,043 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2024-11-23 18:43:39,043 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-23 18:43:39,049 INFO L225 Difference]: With dead ends: 111 [2024-11-23 18:43:39,049 INFO L226 Difference]: Without dead ends: 49 [2024-11-23 18:43:39,052 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-11-23 18:43:39,056 INFO L435 NwaCegarLoop]: 79 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 79 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-23 18:43:39,057 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 79 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-23 18:43:39,069 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2024-11-23 18:43:39,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2024-11-23 18:43:39,086 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) [2024-11-23 18:43:39,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 68 transitions. [2024-11-23 18:43:39,092 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 68 transitions. Word has length 7 [2024-11-23 18:43:39,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-23 18:43:39,093 INFO L471 AbstractCegarLoop]: Abstraction has 49 states and 68 transitions. [2024-11-23 18:43:39,093 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 18:43:39,094 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 68 transitions. [2024-11-23 18:43:39,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2024-11-23 18:43:39,094 INFO L210 NwaCegarLoop]: Found error trace [2024-11-23 18:43:39,094 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-11-23 18:43:39,108 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d028fee2-1ae5-4220-8d8e-d4e78722bf3f/bin/uautomizer-verify-LYvppIcaGC/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Ended with exit code 0 [2024-11-23 18:43:39,298 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d028fee2-1ae5-4220-8d8e-d4e78722bf3f/bin/uautomizer-verify-LYvppIcaGC/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-11-23 18:43:39,299 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-23 18:43:39,299 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 18:43:39,299 INFO L85 PathProgramCache]: Analyzing trace with hash 78562400, now seen corresponding path program 1 times [2024-11-23 18:43:39,300 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-23 18:43:39,300 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [294552111] [2024-11-23 18:43:39,300 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 18:43:39,300 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-11-23 18:43:39,300 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d028fee2-1ae5-4220-8d8e-d4e78722bf3f/bin/uautomizer-verify-LYvppIcaGC/mathsat [2024-11-23 18:43:39,302 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d028fee2-1ae5-4220-8d8e-d4e78722bf3f/bin/uautomizer-verify-LYvppIcaGC/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2024-11-23 18:43:39,307 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d028fee2-1ae5-4220-8d8e-d4e78722bf3f/bin/uautomizer-verify-LYvppIcaGC/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2024-11-23 18:51:43,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 18:51:44,240 INFO L256 TraceCheckSpWp]: Trace formula consists of 20 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-11-23 18:51:44,243 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-23 18:51:52,978 WARN L286 SmtUtils]: Spent 8.20s on a formula simplification that was a NOOP. DAG size: 3 (called from [L 728] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2024-11-23 18:52:01,098 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) [2024-11-23 18:52:09,322 WARN L286 SmtUtils]: Spent 8.22s on a formula simplification that was a NOOP. DAG size: 5 (called from [L 728] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2024-11-23 18:52:13,399 WARN L851 $PredicateComparison]: unable to prove that (and (exists ((|v_ULTIMATE.start_main1_~IN~0#1_5| (_ FloatingPoint 8 24))) (let ((.cse0 ((_ to_fp 8 24) c_currentRoundingMode 1.0))) (and (fp.geq |v_ULTIMATE.start_main1_~IN~0#1_5| (_ +zero 8 24)) (fp.lt |v_ULTIMATE.start_main1_~IN~0#1_5| .cse0) (= (fp.sub c_currentRoundingMode (fp.add c_currentRoundingMode (fp.sub c_currentRoundingMode (fp.add c_currentRoundingMode .cse0 (fp.mul c_currentRoundingMode ((_ to_fp 8 24) c_currentRoundingMode (/ 1.0 2.0)) |v_ULTIMATE.start_main1_~IN~0#1_5|)) (fp.mul c_currentRoundingMode (fp.mul c_currentRoundingMode ((_ to_fp 8 24) c_currentRoundingMode (/ 1.0 8.0)) |v_ULTIMATE.start_main1_~IN~0#1_5|) |v_ULTIMATE.start_main1_~IN~0#1_5|)) (fp.mul c_currentRoundingMode (fp.mul c_currentRoundingMode (fp.mul c_currentRoundingMode ((_ to_fp 8 24) c_currentRoundingMode (/ 1.0 16.0)) |v_ULTIMATE.start_main1_~IN~0#1_5|) |v_ULTIMATE.start_main1_~IN~0#1_5|) |v_ULTIMATE.start_main1_~IN~0#1_5|)) (fp.mul c_currentRoundingMode (fp.mul c_currentRoundingMode (fp.mul c_currentRoundingMode (fp.mul c_currentRoundingMode ((_ to_fp 8 24) c_currentRoundingMode (/ 5.0 128.0)) |v_ULTIMATE.start_main1_~IN~0#1_5|) |v_ULTIMATE.start_main1_~IN~0#1_5|) |v_ULTIMATE.start_main1_~IN~0#1_5|) |v_ULTIMATE.start_main1_~IN~0#1_5|)) |c_ULTIMATE.start_main1_~result~0#1|)))) (= c_currentRoundingMode roundNearestTiesToEven)) is different from false [2024-11-23 18:52:29,806 WARN L286 SmtUtils]: Spent 8.26s on a formula simplification that was a NOOP. DAG size: 3 (called from [L 728] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2024-11-23 18:52:38,013 WARN L286 SmtUtils]: Spent 8.21s on a formula simplification that was a NOOP. DAG size: 5 (called from [L 728] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2024-11-23 18:52:46,139 WARN L286 SmtUtils]: Spent 8.13s on a formula simplification that was a NOOP. DAG size: 30 (called from [L 728] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2024-11-23 18:52:58,398 WARN L286 SmtUtils]: Spent 8.20s on a formula simplification that was a NOOP. DAG size: 3 (called from [L 728] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2024-11-23 18:53:06,615 WARN L286 SmtUtils]: Spent 8.22s on a formula simplification that was a NOOP. DAG size: 5 (called from [L 728] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2024-11-23 18:53:14,731 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) [2024-11-23 18:53:18,839 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 [2024-11-23 18:53:22,889 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 [2024-11-23 18:53:22,890 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-23 18:53:22,890 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-23 18:53:22,890 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-23 18:53:22,890 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [294552111] [2024-11-23 18:53:22,890 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [294552111] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-23 18:53:22,890 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-23 18:53:22,890 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-23 18:53:22,891 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [310696146] [2024-11-23 18:53:22,891 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-23 18:53:22,892 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-23 18:53:22,892 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-23 18:53:22,892 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-23 18:53:22,892 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=12, Unknown=3, NotChecked=14, Total=42 [2024-11-23 18:53:22,893 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) [2024-11-23 18:53:27,170 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 [] [2024-11-23 18:53:31,176 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, FloatingPoint, RoundingMode, Real, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-11-23 18:53:35,185 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, FloatingPoint, RoundingMode, Real], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-11-23 18:53:35,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-23 18:53:35,445 INFO L93 Difference]: Finished difference Result 49 states and 68 transitions. [2024-11-23 18:53:35,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-23 18:53:35,446 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 1.1666666666666667) internal successors, (7), 6 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2024-11-23 18:53:35,446 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-23 18:53:35,447 INFO L225 Difference]: With dead ends: 49 [2024-11-23 18:53:35,447 INFO L226 Difference]: Without dead ends: 44 [2024-11-23 18:53:35,447 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 12.5s TimeCoverageRelationStatistics Valid=13, Invalid=12, Unknown=3, NotChecked=14, Total=42 [2024-11-23 18:53:35,448 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, 12.5s IncrementalHoareTripleChecker+Time [2024-11-23 18:53:35,448 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [62 Valid, 169 Invalid, 163 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 24 Invalid, 3 Unknown, 136 Unchecked, 12.5s Time] [2024-11-23 18:53:35,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2024-11-23 18:53:35,453 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2024-11-23 18:53:35,454 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) [2024-11-23 18:53:35,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 63 transitions. [2024-11-23 18:53:35,455 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 63 transitions. Word has length 7 [2024-11-23 18:53:35,455 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-23 18:53:35,456 INFO L471 AbstractCegarLoop]: Abstraction has 44 states and 63 transitions. [2024-11-23 18:53:35,456 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 1.1666666666666667) internal successors, (7), 6 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 18:53:35,456 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 63 transitions. [2024-11-23 18:53:35,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2024-11-23 18:53:35,457 INFO L210 NwaCegarLoop]: Found error trace [2024-11-23 18:53:35,457 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] [2024-11-23 18:53:35,489 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d028fee2-1ae5-4220-8d8e-d4e78722bf3f/bin/uautomizer-verify-LYvppIcaGC/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Ended with exit code 0 [2024-11-23 18:53:35,658 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d028fee2-1ae5-4220-8d8e-d4e78722bf3f/bin/uautomizer-verify-LYvppIcaGC/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-11-23 18:53:35,658 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-23 18:53:35,659 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 18:53:35,659 INFO L85 PathProgramCache]: Analyzing trace with hash -1680982752, now seen corresponding path program 1 times [2024-11-23 18:53:35,659 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-23 18:53:35,659 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [370378410] [2024-11-23 18:53:35,659 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 18:53:35,659 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 18:53:35,660 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d028fee2-1ae5-4220-8d8e-d4e78722bf3f/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-23 18:53:35,663 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d028fee2-1ae5-4220-8d8e-d4e78722bf3f/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-23 18:53:35,664 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d028fee2-1ae5-4220-8d8e-d4e78722bf3f/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-23 18:53:35,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 18:53:35,733 INFO L256 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-11-23 18:53:35,735 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-23 18:53:35,951 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-23 18:53:35,952 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-23 18:53:35,952 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-23 18:53:35,953 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [370378410] [2024-11-23 18:53:35,953 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [370378410] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-23 18:53:35,953 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-23 18:53:35,953 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-23 18:53:35,953 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [726279459] [2024-11-23 18:53:35,953 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-23 18:53:35,954 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-23 18:53:35,954 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-23 18:53:35,955 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-23 18:53:35,955 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-23 18:53:35,955 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) [2024-11-23 18:53:36,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-23 18:53:36,612 INFO L93 Difference]: Finished difference Result 96 states and 142 transitions. [2024-11-23 18:53:36,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-23 18:53:36,613 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 [2024-11-23 18:53:36,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-23 18:53:36,615 INFO L225 Difference]: With dead ends: 96 [2024-11-23 18:53:36,615 INFO L226 Difference]: Without dead ends: 56 [2024-11-23 18:53:36,616 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 [2024-11-23 18:53:36,617 INFO L435 NwaCegarLoop]: 51 mSDtfsCounter, 10 mSDsluCounter, 88 mSDsCounter, 0 mSdLazyCounter, 52 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s 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 [2024-11-23 18:53:36,617 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] [2024-11-23 18:53:36,622 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2024-11-23 18:53:36,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 49. [2024-11-23 18:53:36,636 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) [2024-11-23 18:53:36,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 69 transitions. [2024-11-23 18:53:36,640 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 69 transitions. Word has length 42 [2024-11-23 18:53:36,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-23 18:53:36,640 INFO L471 AbstractCegarLoop]: Abstraction has 49 states and 69 transitions. [2024-11-23 18:53:36,640 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) [2024-11-23 18:53:36,641 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 69 transitions. [2024-11-23 18:53:36,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2024-11-23 18:53:36,642 INFO L210 NwaCegarLoop]: Found error trace [2024-11-23 18:53:36,642 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] [2024-11-23 18:53:36,653 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d028fee2-1ae5-4220-8d8e-d4e78722bf3f/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-11-23 18:53:36,842 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d028fee2-1ae5-4220-8d8e-d4e78722bf3f/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 18:53:36,842 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-23 18:53:36,843 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 18:53:36,843 INFO L85 PathProgramCache]: Analyzing trace with hash -962375373, now seen corresponding path program 1 times [2024-11-23 18:53:36,843 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-23 18:53:36,843 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [135049935] [2024-11-23 18:53:36,844 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 18:53:36,844 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 18:53:36,844 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d028fee2-1ae5-4220-8d8e-d4e78722bf3f/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-23 18:53:36,847 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d028fee2-1ae5-4220-8d8e-d4e78722bf3f/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-23 18:53:36,848 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d028fee2-1ae5-4220-8d8e-d4e78722bf3f/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-23 18:53:36,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 18:53:36,915 INFO L256 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-11-23 18:53:36,917 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-23 18:53:37,006 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-11-23 18:53:37,006 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-23 18:53:37,007 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-23 18:53:37,007 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [135049935] [2024-11-23 18:53:37,007 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [135049935] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-23 18:53:37,007 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-23 18:53:37,007 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-23 18:53:37,007 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [401793376] [2024-11-23 18:53:37,007 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-23 18:53:37,008 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-23 18:53:37,008 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-23 18:53:37,008 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-23 18:53:37,009 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-23 18:53:37,009 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) [2024-11-23 18:53:37,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-23 18:53:37,058 INFO L93 Difference]: Finished difference Result 58 states and 79 transitions. [2024-11-23 18:53:37,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-23 18:53:37,059 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 [2024-11-23 18:53:37,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-23 18:53:37,061 INFO L225 Difference]: With dead ends: 58 [2024-11-23 18:53:37,061 INFO L226 Difference]: Without dead ends: 49 [2024-11-23 18:53:37,061 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 [2024-11-23 18:53:37,062 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 [2024-11-23 18:53:37,062 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] [2024-11-23 18:53:37,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2024-11-23 18:53:37,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2024-11-23 18:53:37,069 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) [2024-11-23 18:53:37,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 68 transitions. [2024-11-23 18:53:37,070 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 68 transitions. Word has length 44 [2024-11-23 18:53:37,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-23 18:53:37,070 INFO L471 AbstractCegarLoop]: Abstraction has 49 states and 68 transitions. [2024-11-23 18:53:37,071 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) [2024-11-23 18:53:37,071 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 68 transitions. [2024-11-23 18:53:37,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2024-11-23 18:53:37,074 INFO L210 NwaCegarLoop]: Found error trace [2024-11-23 18:53:37,074 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] [2024-11-23 18:53:37,086 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d028fee2-1ae5-4220-8d8e-d4e78722bf3f/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-11-23 18:53:37,278 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d028fee2-1ae5-4220-8d8e-d4e78722bf3f/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 18:53:37,278 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-23 18:53:37,279 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 18:53:37,279 INFO L85 PathProgramCache]: Analyzing trace with hash -1484194953, now seen corresponding path program 1 times [2024-11-23 18:53:37,279 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-23 18:53:37,279 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [964259721] [2024-11-23 18:53:37,279 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 18:53:37,279 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 18:53:37,279 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d028fee2-1ae5-4220-8d8e-d4e78722bf3f/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-23 18:53:37,281 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d028fee2-1ae5-4220-8d8e-d4e78722bf3f/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-23 18:53:37,282 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d028fee2-1ae5-4220-8d8e-d4e78722bf3f/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-23 18:53:37,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 18:53:37,357 INFO L256 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-11-23 18:53:37,359 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-23 18:53:37,611 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-23 18:53:37,611 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-23 18:53:37,611 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-23 18:53:37,612 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [964259721] [2024-11-23 18:53:37,612 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [964259721] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-23 18:53:37,612 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-23 18:53:37,612 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-23 18:53:37,612 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1136225063] [2024-11-23 18:53:37,612 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-23 18:53:37,612 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-23 18:53:37,613 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-23 18:53:37,613 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-23 18:53:37,613 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-23 18:53:37,613 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) [2024-11-23 18:53:38,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-23 18:53:38,014 INFO L93 Difference]: Finished difference Result 97 states and 138 transitions. [2024-11-23 18:53:38,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-23 18:53:38,015 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 [2024-11-23 18:53:38,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-23 18:53:38,016 INFO L225 Difference]: With dead ends: 97 [2024-11-23 18:53:38,016 INFO L226 Difference]: Without dead ends: 56 [2024-11-23 18:53:38,016 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 [2024-11-23 18:53:38,017 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 [2024-11-23 18:53:38,017 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] [2024-11-23 18:53:38,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2024-11-23 18:53:38,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 53. [2024-11-23 18:53:38,026 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) [2024-11-23 18:53:38,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 74 transitions. [2024-11-23 18:53:38,028 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 74 transitions. Word has length 46 [2024-11-23 18:53:38,028 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-23 18:53:38,028 INFO L471 AbstractCegarLoop]: Abstraction has 53 states and 74 transitions. [2024-11-23 18:53:38,028 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) [2024-11-23 18:53:38,028 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 74 transitions. [2024-11-23 18:53:38,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2024-11-23 18:53:38,030 INFO L210 NwaCegarLoop]: Found error trace [2024-11-23 18:53:38,030 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] [2024-11-23 18:53:38,040 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d028fee2-1ae5-4220-8d8e-d4e78722bf3f/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2024-11-23 18:53:38,230 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d028fee2-1ae5-4220-8d8e-d4e78722bf3f/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 18:53:38,231 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-23 18:53:38,231 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 18:53:38,231 INFO L85 PathProgramCache]: Analyzing trace with hash 443440524, now seen corresponding path program 1 times [2024-11-23 18:53:38,231 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-23 18:53:38,231 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [453171295] [2024-11-23 18:53:38,231 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 18:53:38,232 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 18:53:38,232 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d028fee2-1ae5-4220-8d8e-d4e78722bf3f/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-23 18:53:38,233 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d028fee2-1ae5-4220-8d8e-d4e78722bf3f/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-23 18:53:38,234 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d028fee2-1ae5-4220-8d8e-d4e78722bf3f/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-23 18:53:38,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 18:53:38,298 INFO L256 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-11-23 18:53:38,301 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-23 18:53:39,801 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-11-23 18:53:39,801 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-23 18:53:41,893 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-11-23 18:53:41,893 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-23 18:53:41,894 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [453171295] [2024-11-23 18:53:41,894 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [453171295] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-23 18:53:41,894 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-23 18:53:41,894 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2024-11-23 18:53:41,894 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1160216579] [2024-11-23 18:53:41,894 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-23 18:53:41,895 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-11-23 18:53:41,895 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-23 18:53:41,897 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-11-23 18:53:41,899 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2024-11-23 18:53:41,899 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) [2024-11-23 18:53:42,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-23 18:53:42,932 INFO L93 Difference]: Finished difference Result 99 states and 151 transitions. [2024-11-23 18:53:42,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-23 18:53:42,932 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 [2024-11-23 18:53:42,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-23 18:53:42,934 INFO L225 Difference]: With dead ends: 99 [2024-11-23 18:53:42,934 INFO L226 Difference]: Without dead ends: 76 [2024-11-23 18:53:42,934 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 77 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2024-11-23 18:53:42,935 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 [2024-11-23 18:53:42,938 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] [2024-11-23 18:53:42,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2024-11-23 18:53:42,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 76. [2024-11-23 18:53:42,962 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) [2024-11-23 18:53:42,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 115 transitions. [2024-11-23 18:53:42,964 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 115 transitions. Word has length 47 [2024-11-23 18:53:42,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-23 18:53:42,964 INFO L471 AbstractCegarLoop]: Abstraction has 76 states and 115 transitions. [2024-11-23 18:53:42,965 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) [2024-11-23 18:53:42,965 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 115 transitions. [2024-11-23 18:53:42,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2024-11-23 18:53:42,970 INFO L210 NwaCegarLoop]: Found error trace [2024-11-23 18:53:42,970 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] [2024-11-23 18:53:42,981 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d028fee2-1ae5-4220-8d8e-d4e78722bf3f/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-11-23 18:53:43,171 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d028fee2-1ae5-4220-8d8e-d4e78722bf3f/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 18:53:43,171 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-23 18:53:43,171 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 18:53:43,171 INFO L85 PathProgramCache]: Analyzing trace with hash 1195332808, now seen corresponding path program 1 times [2024-11-23 18:53:43,172 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-23 18:53:43,172 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [624590110] [2024-11-23 18:53:43,172 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 18:53:43,172 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 18:53:43,172 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d028fee2-1ae5-4220-8d8e-d4e78722bf3f/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-23 18:53:43,175 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d028fee2-1ae5-4220-8d8e-d4e78722bf3f/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-23 18:53:43,176 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d028fee2-1ae5-4220-8d8e-d4e78722bf3f/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-23 18:53:43,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 18:53:43,235 INFO L256 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-11-23 18:53:43,237 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-23 18:53:43,869 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2024-11-23 18:53:43,869 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-23 18:53:44,517 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2024-11-23 18:53:44,517 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-23 18:53:44,517 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [624590110] [2024-11-23 18:53:44,517 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [624590110] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-23 18:53:44,517 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-23 18:53:44,517 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2024-11-23 18:53:44,517 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1920608018] [2024-11-23 18:53:44,517 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-23 18:53:44,518 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-23 18:53:44,518 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-23 18:53:44,518 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-23 18:53:44,519 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-23 18:53:44,519 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) [2024-11-23 18:53:44,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-23 18:53:44,916 INFO L93 Difference]: Finished difference Result 115 states and 177 transitions. [2024-11-23 18:53:44,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-23 18:53:44,917 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 [2024-11-23 18:53:44,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-23 18:53:44,919 INFO L225 Difference]: With dead ends: 115 [2024-11-23 18:53:44,920 INFO L226 Difference]: Without dead ends: 110 [2024-11-23 18:53:44,920 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 [2024-11-23 18:53:44,921 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 [2024-11-23 18:53:44,921 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] [2024-11-23 18:53:44,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2024-11-23 18:53:44,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 109. [2024-11-23 18:53:44,939 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) [2024-11-23 18:53:44,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 170 transitions. [2024-11-23 18:53:44,941 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 170 transitions. Word has length 47 [2024-11-23 18:53:44,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-23 18:53:44,941 INFO L471 AbstractCegarLoop]: Abstraction has 109 states and 170 transitions. [2024-11-23 18:53:44,941 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) [2024-11-23 18:53:44,941 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 170 transitions. [2024-11-23 18:53:44,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2024-11-23 18:53:44,943 INFO L210 NwaCegarLoop]: Found error trace [2024-11-23 18:53:44,943 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] [2024-11-23 18:53:44,954 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d028fee2-1ae5-4220-8d8e-d4e78722bf3f/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-11-23 18:53:45,147 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d028fee2-1ae5-4220-8d8e-d4e78722bf3f/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 18:53:45,147 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-23 18:53:45,148 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 18:53:45,148 INFO L85 PathProgramCache]: Analyzing trace with hash -1516766196, now seen corresponding path program 1 times [2024-11-23 18:53:45,148 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-23 18:53:45,148 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2042497925] [2024-11-23 18:53:45,148 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 18:53:45,148 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 18:53:45,148 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d028fee2-1ae5-4220-8d8e-d4e78722bf3f/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-23 18:53:45,150 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d028fee2-1ae5-4220-8d8e-d4e78722bf3f/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-23 18:53:45,151 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d028fee2-1ae5-4220-8d8e-d4e78722bf3f/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-23 18:53:45,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 18:53:45,211 INFO L256 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-23 18:53:45,213 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-23 18:53:45,996 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2024-11-23 18:53:45,997 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-23 18:53:46,705 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-11-23 18:53:46,705 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-23 18:53:46,705 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2042497925] [2024-11-23 18:53:46,705 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2042497925] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-23 18:53:46,706 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-23 18:53:46,706 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [8] total 10 [2024-11-23 18:53:46,706 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [204205042] [2024-11-23 18:53:46,706 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-23 18:53:46,706 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-23 18:53:46,706 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-23 18:53:46,707 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-23 18:53:46,707 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2024-11-23 18:53:46,707 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) [2024-11-23 18:53:47,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-23 18:53:47,008 INFO L93 Difference]: Finished difference Result 115 states and 175 transitions. [2024-11-23 18:53:47,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-23 18:53:47,009 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 [2024-11-23 18:53:47,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-23 18:53:47,010 INFO L225 Difference]: With dead ends: 115 [2024-11-23 18:53:47,011 INFO L226 Difference]: Without dead ends: 109 [2024-11-23 18:53:47,011 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 [2024-11-23 18:53:47,012 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 [2024-11-23 18:53:47,012 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] [2024-11-23 18:53:47,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2024-11-23 18:53:47,032 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 109. [2024-11-23 18:53:47,033 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) [2024-11-23 18:53:47,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 169 transitions. [2024-11-23 18:53:47,035 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 169 transitions. Word has length 49 [2024-11-23 18:53:47,035 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-23 18:53:47,035 INFO L471 AbstractCegarLoop]: Abstraction has 109 states and 169 transitions. [2024-11-23 18:53:47,035 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) [2024-11-23 18:53:47,035 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 169 transitions. [2024-11-23 18:53:47,037 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2024-11-23 18:53:47,037 INFO L210 NwaCegarLoop]: Found error trace [2024-11-23 18:53:47,037 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] [2024-11-23 18:53:47,046 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d028fee2-1ae5-4220-8d8e-d4e78722bf3f/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-11-23 18:53:47,237 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d028fee2-1ae5-4220-8d8e-d4e78722bf3f/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 18:53:47,238 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-23 18:53:47,238 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 18:53:47,238 INFO L85 PathProgramCache]: Analyzing trace with hash -1574024498, now seen corresponding path program 1 times [2024-11-23 18:53:47,238 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-23 18:53:47,238 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1519910818] [2024-11-23 18:53:47,238 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 18:53:47,238 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 18:53:47,239 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d028fee2-1ae5-4220-8d8e-d4e78722bf3f/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-23 18:53:47,240 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d028fee2-1ae5-4220-8d8e-d4e78722bf3f/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-23 18:53:47,241 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d028fee2-1ae5-4220-8d8e-d4e78722bf3f/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-11-23 18:53:47,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 18:53:47,299 INFO L256 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-11-23 18:53:47,301 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-23 18:53:47,753 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-11-23 18:53:47,754 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-23 18:53:47,754 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-23 18:53:47,754 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1519910818] [2024-11-23 18:53:47,754 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1519910818] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-23 18:53:47,755 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-23 18:53:47,755 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-23 18:53:47,755 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [524827991] [2024-11-23 18:53:47,755 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-23 18:53:47,756 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-23 18:53:47,756 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-23 18:53:47,756 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-23 18:53:47,756 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-23 18:53:47,757 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) [2024-11-23 18:53:48,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-23 18:53:48,058 INFO L93 Difference]: Finished difference Result 138 states and 200 transitions. [2024-11-23 18:53:48,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-23 18:53:48,059 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 [2024-11-23 18:53:48,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-23 18:53:48,061 INFO L225 Difference]: With dead ends: 138 [2024-11-23 18:53:48,061 INFO L226 Difference]: Without dead ends: 120 [2024-11-23 18:53:48,061 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 [2024-11-23 18:53:48,062 INFO L435 NwaCegarLoop]: 57 mSDtfsCounter, 1 mSDsluCounter, 161 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s 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, 0.3s IncrementalHoareTripleChecker+Time [2024-11-23 18:53:48,062 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 218 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-23 18:53:48,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2024-11-23 18:53:48,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 120. [2024-11-23 18:53:48,075 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) [2024-11-23 18:53:48,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 177 transitions. [2024-11-23 18:53:48,077 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 177 transitions. Word has length 49 [2024-11-23 18:53:48,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-23 18:53:48,078 INFO L471 AbstractCegarLoop]: Abstraction has 120 states and 177 transitions. [2024-11-23 18:53:48,078 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) [2024-11-23 18:53:48,078 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 177 transitions. [2024-11-23 18:53:48,079 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2024-11-23 18:53:48,079 INFO L210 NwaCegarLoop]: Found error trace [2024-11-23 18:53:48,080 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] [2024-11-23 18:53:48,090 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d028fee2-1ae5-4220-8d8e-d4e78722bf3f/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2024-11-23 18:53:48,280 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d028fee2-1ae5-4220-8d8e-d4e78722bf3f/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 18:53:48,280 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-23 18:53:48,281 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 18:53:48,281 INFO L85 PathProgramCache]: Analyzing trace with hash -1835478928, now seen corresponding path program 1 times [2024-11-23 18:53:48,281 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-23 18:53:48,281 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [180407022] [2024-11-23 18:53:48,281 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 18:53:48,281 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 18:53:48,281 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d028fee2-1ae5-4220-8d8e-d4e78722bf3f/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-23 18:53:48,283 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d028fee2-1ae5-4220-8d8e-d4e78722bf3f/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-23 18:53:48,284 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d028fee2-1ae5-4220-8d8e-d4e78722bf3f/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-11-23 18:53:48,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 18:53:48,347 INFO L256 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-11-23 18:53:48,349 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-23 18:53:48,821 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2024-11-23 18:53:48,821 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-23 18:53:48,821 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-23 18:53:48,821 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [180407022] [2024-11-23 18:53:48,822 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [180407022] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-23 18:53:48,822 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-23 18:53:48,822 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-11-23 18:53:48,822 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1499894216] [2024-11-23 18:53:48,822 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-23 18:53:48,822 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-23 18:53:48,822 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-23 18:53:48,823 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-23 18:53:48,823 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-23 18:53:48,823 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) [2024-11-23 18:53:49,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-23 18:53:49,110 INFO L93 Difference]: Finished difference Result 168 states and 241 transitions. [2024-11-23 18:53:49,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-23 18:53:49,110 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 [2024-11-23 18:53:49,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-23 18:53:49,112 INFO L225 Difference]: With dead ends: 168 [2024-11-23 18:53:49,112 INFO L226 Difference]: Without dead ends: 123 [2024-11-23 18:53:49,112 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 [2024-11-23 18:53:49,113 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 [2024-11-23 18:53:49,113 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] [2024-11-23 18:53:49,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2024-11-23 18:53:49,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 123. [2024-11-23 18:53:49,123 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) [2024-11-23 18:53:49,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 177 transitions. [2024-11-23 18:53:49,125 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 177 transitions. Word has length 50 [2024-11-23 18:53:49,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-23 18:53:49,125 INFO L471 AbstractCegarLoop]: Abstraction has 123 states and 177 transitions. [2024-11-23 18:53:49,125 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) [2024-11-23 18:53:49,125 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 177 transitions. [2024-11-23 18:53:49,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2024-11-23 18:53:49,127 INFO L210 NwaCegarLoop]: Found error trace [2024-11-23 18:53:49,127 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] [2024-11-23 18:53:49,137 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d028fee2-1ae5-4220-8d8e-d4e78722bf3f/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2024-11-23 18:53:49,331 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d028fee2-1ae5-4220-8d8e-d4e78722bf3f/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 18:53:49,331 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-23 18:53:49,332 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 18:53:49,332 INFO L85 PathProgramCache]: Analyzing trace with hash 1862759882, now seen corresponding path program 1 times [2024-11-23 18:53:49,332 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-23 18:53:49,332 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1682295968] [2024-11-23 18:53:49,332 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 18:53:49,332 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 18:53:49,332 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d028fee2-1ae5-4220-8d8e-d4e78722bf3f/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-23 18:53:49,334 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d028fee2-1ae5-4220-8d8e-d4e78722bf3f/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-23 18:53:49,335 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d028fee2-1ae5-4220-8d8e-d4e78722bf3f/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-11-23 18:53:49,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 18:53:49,388 INFO L256 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 13 conjuncts are in the unsatisfiable core [2024-11-23 18:53:49,390 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-23 18:53:51,217 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 10 proven. 10 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-23 18:53:51,217 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-23 18:53:54,270 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 10 proven. 10 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-23 18:53:54,270 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-23 18:53:54,271 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1682295968] [2024-11-23 18:53:54,271 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1682295968] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-23 18:53:54,271 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-23 18:53:54,271 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2024-11-23 18:53:54,271 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1480775626] [2024-11-23 18:53:54,271 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-23 18:53:54,271 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-11-23 18:53:54,271 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-23 18:53:54,272 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-11-23 18:53:54,272 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2024-11-23 18:53:54,272 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) [2024-11-23 18:54:03,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-23 18:54:03,701 INFO L93 Difference]: Finished difference Result 236 states and 391 transitions. [2024-11-23 18:54:03,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2024-11-23 18:54:03,705 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 [2024-11-23 18:54:03,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-23 18:54:03,707 INFO L225 Difference]: With dead ends: 236 [2024-11-23 18:54:03,707 INFO L226 Difference]: Without dead ends: 215 [2024-11-23 18:54:03,708 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 82 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 129 ImplicationChecksByTransitivity, 6.0s TimeCoverageRelationStatistics Valid=126, Invalid=744, Unknown=0, NotChecked=0, Total=870 [2024-11-23 18:54:03,709 INFO L435 NwaCegarLoop]: 66 mSDtfsCounter, 75 mSDsluCounter, 756 mSDsCounter, 0 mSdLazyCounter, 573 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.4s 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, 6.5s IncrementalHoareTripleChecker+Time [2024-11-23 18:54:03,710 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [83 Valid, 822 Invalid, 591 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 573 Invalid, 0 Unknown, 0 Unchecked, 6.5s Time] [2024-11-23 18:54:03,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 215 states. [2024-11-23 18:54:03,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 215 to 133. [2024-11-23 18:54:03,731 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) [2024-11-23 18:54:03,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 204 transitions. [2024-11-23 18:54:03,733 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 204 transitions. Word has length 50 [2024-11-23 18:54:03,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-23 18:54:03,734 INFO L471 AbstractCegarLoop]: Abstraction has 133 states and 204 transitions. [2024-11-23 18:54:03,734 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) [2024-11-23 18:54:03,734 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 204 transitions. [2024-11-23 18:54:03,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2024-11-23 18:54:03,735 INFO L210 NwaCegarLoop]: Found error trace [2024-11-23 18:54:03,736 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] [2024-11-23 18:54:03,747 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d028fee2-1ae5-4220-8d8e-d4e78722bf3f/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2024-11-23 18:54:03,936 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d028fee2-1ae5-4220-8d8e-d4e78722bf3f/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 18:54:03,936 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-23 18:54:03,937 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 18:54:03,937 INFO L85 PathProgramCache]: Analyzing trace with hash 110748472, now seen corresponding path program 1 times [2024-11-23 18:54:03,937 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-23 18:54:03,937 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [706719620] [2024-11-23 18:54:03,937 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 18:54:03,937 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 18:54:03,937 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d028fee2-1ae5-4220-8d8e-d4e78722bf3f/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-23 18:54:03,939 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d028fee2-1ae5-4220-8d8e-d4e78722bf3f/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-23 18:54:03,940 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d028fee2-1ae5-4220-8d8e-d4e78722bf3f/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-11-23 18:54:03,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 18:54:03,997 INFO L256 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-11-23 18:54:03,999 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-23 18:54:04,345 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 25 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-23 18:54:04,345 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-23 18:54:05,202 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 4 proven. 10 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2024-11-23 18:54:05,202 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-23 18:54:05,202 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [706719620] [2024-11-23 18:54:05,203 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [706719620] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-23 18:54:05,203 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-23 18:54:05,203 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2024-11-23 18:54:05,203 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [994116343] [2024-11-23 18:54:05,203 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-23 18:54:05,204 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-23 18:54:05,204 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-23 18:54:05,204 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-23 18:54:05,205 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2024-11-23 18:54:05,205 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) [2024-11-23 18:54:06,249 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-23 18:54:06,249 INFO L93 Difference]: Finished difference Result 272 states and 422 transitions. [2024-11-23 18:54:06,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-23 18:54:06,250 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 [2024-11-23 18:54:06,251 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-23 18:54:06,252 INFO L225 Difference]: With dead ends: 272 [2024-11-23 18:54:06,252 INFO L226 Difference]: Without dead ends: 151 [2024-11-23 18:54:06,253 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 95 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2024-11-23 18:54:06,254 INFO L435 NwaCegarLoop]: 57 mSDtfsCounter, 22 mSDsluCounter, 157 mSDsCounter, 0 mSdLazyCounter, 79 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s 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 [2024-11-23 18:54:06,256 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] [2024-11-23 18:54:06,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2024-11-23 18:54:06,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 142. [2024-11-23 18:54:06,282 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) [2024-11-23 18:54:06,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 226 transitions. [2024-11-23 18:54:06,284 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 226 transitions. Word has length 51 [2024-11-23 18:54:06,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-23 18:54:06,284 INFO L471 AbstractCegarLoop]: Abstraction has 142 states and 226 transitions. [2024-11-23 18:54:06,284 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) [2024-11-23 18:54:06,284 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 226 transitions. [2024-11-23 18:54:06,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2024-11-23 18:54:06,287 INFO L210 NwaCegarLoop]: Found error trace [2024-11-23 18:54:06,288 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] [2024-11-23 18:54:06,297 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d028fee2-1ae5-4220-8d8e-d4e78722bf3f/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2024-11-23 18:54:06,488 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d028fee2-1ae5-4220-8d8e-d4e78722bf3f/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 18:54:06,488 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-23 18:54:06,489 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 18:54:06,489 INFO L85 PathProgramCache]: Analyzing trace with hash -113107662, now seen corresponding path program 1 times [2024-11-23 18:54:06,489 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-23 18:54:06,489 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1839931685] [2024-11-23 18:54:06,489 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 18:54:06,489 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 18:54:06,489 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d028fee2-1ae5-4220-8d8e-d4e78722bf3f/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-23 18:54:06,491 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d028fee2-1ae5-4220-8d8e-d4e78722bf3f/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-23 18:54:06,492 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d028fee2-1ae5-4220-8d8e-d4e78722bf3f/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-11-23 18:54:06,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 18:54:06,555 INFO L256 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 13 conjuncts are in the unsatisfiable core [2024-11-23 18:54:06,558 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-23 18:54:08,605 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 10 proven. 13 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-23 18:54:08,605 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-23 18:54:11,954 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 10 proven. 13 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-23 18:54:11,954 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-23 18:54:11,954 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1839931685] [2024-11-23 18:54:11,954 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1839931685] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-23 18:54:11,954 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-23 18:54:11,954 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 20 [2024-11-23 18:54:11,955 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1098122083] [2024-11-23 18:54:11,955 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-23 18:54:11,955 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-11-23 18:54:11,955 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-23 18:54:11,955 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-11-23 18:54:11,956 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=327, Unknown=0, NotChecked=0, Total=380 [2024-11-23 18:54:11,956 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) [2024-11-23 18:54:18,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-23 18:54:18,744 INFO L93 Difference]: Finished difference Result 258 states and 463 transitions. [2024-11-23 18:54:18,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2024-11-23 18:54:18,745 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 [2024-11-23 18:54:18,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-23 18:54:18,749 INFO L225 Difference]: With dead ends: 258 [2024-11-23 18:54:18,750 INFO L226 Difference]: Without dead ends: 237 [2024-11-23 18:54:18,750 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 84 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 5.2s TimeCoverageRelationStatistics Valid=104, Invalid=598, Unknown=0, NotChecked=0, Total=702 [2024-11-23 18:54:18,753 INFO L435 NwaCegarLoop]: 79 mSDtfsCounter, 68 mSDsluCounter, 793 mSDsCounter, 0 mSdLazyCounter, 438 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.1s 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, 5.2s IncrementalHoareTripleChecker+Time [2024-11-23 18:54:18,754 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [74 Valid, 872 Invalid, 467 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 438 Invalid, 0 Unknown, 0 Unchecked, 5.2s Time] [2024-11-23 18:54:18,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 237 states. [2024-11-23 18:54:18,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 237 to 147. [2024-11-23 18:54:18,781 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) [2024-11-23 18:54:18,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 236 transitions. [2024-11-23 18:54:18,783 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 236 transitions. Word has length 52 [2024-11-23 18:54:18,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-23 18:54:18,783 INFO L471 AbstractCegarLoop]: Abstraction has 147 states and 236 transitions. [2024-11-23 18:54:18,784 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) [2024-11-23 18:54:18,784 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 236 transitions. [2024-11-23 18:54:18,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2024-11-23 18:54:18,785 INFO L210 NwaCegarLoop]: Found error trace [2024-11-23 18:54:18,785 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] [2024-11-23 18:54:18,796 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d028fee2-1ae5-4220-8d8e-d4e78722bf3f/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2024-11-23 18:54:18,989 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d028fee2-1ae5-4220-8d8e-d4e78722bf3f/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 18:54:18,989 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-23 18:54:18,989 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 18:54:18,990 INFO L85 PathProgramCache]: Analyzing trace with hash 1389274316, now seen corresponding path program 1 times [2024-11-23 18:54:18,990 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-23 18:54:18,990 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [184855478] [2024-11-23 18:54:18,990 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 18:54:18,990 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 18:54:18,990 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d028fee2-1ae5-4220-8d8e-d4e78722bf3f/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-23 18:54:18,992 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d028fee2-1ae5-4220-8d8e-d4e78722bf3f/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-23 18:54:18,993 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d028fee2-1ae5-4220-8d8e-d4e78722bf3f/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-11-23 18:54:19,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 18:54:19,047 INFO L256 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 13 conjuncts are in the unsatisfiable core [2024-11-23 18:54:19,049 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-23 18:54:20,208 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 12 proven. 3 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2024-11-23 18:54:20,208 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-23 18:54:22,197 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 12 proven. 3 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2024-11-23 18:54:22,197 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-23 18:54:22,197 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [184855478] [2024-11-23 18:54:22,197 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [184855478] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-23 18:54:22,197 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-23 18:54:22,198 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2024-11-23 18:54:22,198 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [377015615] [2024-11-23 18:54:22,198 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-23 18:54:22,198 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-11-23 18:54:22,198 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-23 18:54:22,199 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-11-23 18:54:22,199 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=202, Unknown=0, NotChecked=0, Total=240 [2024-11-23 18:54:22,199 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) [2024-11-23 18:54:23,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-23 18:54:23,333 INFO L93 Difference]: Finished difference Result 184 states and 283 transitions. [2024-11-23 18:54:23,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-23 18:54:23,333 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 [2024-11-23 18:54:23,334 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-23 18:54:23,335 INFO L225 Difference]: With dead ends: 184 [2024-11-23 18:54:23,335 INFO L226 Difference]: Without dead ends: 152 [2024-11-23 18:54:23,336 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 89 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2024-11-23 18:54:23,336 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 [2024-11-23 18:54:23,337 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] [2024-11-23 18:54:23,338 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2024-11-23 18:54:23,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 151. [2024-11-23 18:54:23,355 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) [2024-11-23 18:54:23,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 240 transitions. [2024-11-23 18:54:23,357 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 240 transitions. Word has length 53 [2024-11-23 18:54:23,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-23 18:54:23,357 INFO L471 AbstractCegarLoop]: Abstraction has 151 states and 240 transitions. [2024-11-23 18:54:23,358 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) [2024-11-23 18:54:23,358 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 240 transitions. [2024-11-23 18:54:23,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2024-11-23 18:54:23,359 INFO L210 NwaCegarLoop]: Found error trace [2024-11-23 18:54:23,359 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] [2024-11-23 18:54:23,370 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d028fee2-1ae5-4220-8d8e-d4e78722bf3f/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2024-11-23 18:54:23,560 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d028fee2-1ae5-4220-8d8e-d4e78722bf3f/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 18:54:23,560 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-23 18:54:23,560 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 18:54:23,561 INFO L85 PathProgramCache]: Analyzing trace with hash -1884624626, now seen corresponding path program 1 times [2024-11-23 18:54:23,561 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-23 18:54:23,561 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [574029893] [2024-11-23 18:54:23,561 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 18:54:23,561 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 18:54:23,561 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d028fee2-1ae5-4220-8d8e-d4e78722bf3f/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-23 18:54:23,565 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d028fee2-1ae5-4220-8d8e-d4e78722bf3f/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-23 18:54:23,566 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d028fee2-1ae5-4220-8d8e-d4e78722bf3f/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-11-23 18:54:23,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 18:54:23,627 INFO L256 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-11-23 18:54:23,629 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-23 18:54:24,369 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2024-11-23 18:54:24,369 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-23 18:54:24,881 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2024-11-23 18:54:24,881 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-23 18:54:24,881 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [574029893] [2024-11-23 18:54:24,881 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [574029893] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-23 18:54:24,881 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-23 18:54:24,881 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2024-11-23 18:54:24,882 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2023999958] [2024-11-23 18:54:24,882 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-23 18:54:24,882 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-23 18:54:24,882 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-23 18:54:24,883 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-23 18:54:24,883 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2024-11-23 18:54:24,883 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) [2024-11-23 18:54:25,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-23 18:54:25,768 INFO L93 Difference]: Finished difference Result 160 states and 248 transitions. [2024-11-23 18:54:25,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-23 18:54:25,768 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 [2024-11-23 18:54:25,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-23 18:54:25,769 INFO L225 Difference]: With dead ends: 160 [2024-11-23 18:54:25,769 INFO L226 Difference]: Without dead ends: 114 [2024-11-23 18:54:25,770 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 98 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2024-11-23 18:54:25,771 INFO L435 NwaCegarLoop]: 58 mSDtfsCounter, 4 mSDsluCounter, 334 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s 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, 0.5s IncrementalHoareTripleChecker+Time [2024-11-23 18:54:25,771 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 392 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-11-23 18:54:25,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2024-11-23 18:54:25,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 114. [2024-11-23 18:54:25,787 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) [2024-11-23 18:54:25,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 175 transitions. [2024-11-23 18:54:25,788 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 175 transitions. Word has length 53 [2024-11-23 18:54:25,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-23 18:54:25,789 INFO L471 AbstractCegarLoop]: Abstraction has 114 states and 175 transitions. [2024-11-23 18:54:25,789 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) [2024-11-23 18:54:25,789 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 175 transitions. [2024-11-23 18:54:25,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2024-11-23 18:54:25,791 INFO L210 NwaCegarLoop]: Found error trace [2024-11-23 18:54:25,791 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] [2024-11-23 18:54:25,802 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d028fee2-1ae5-4220-8d8e-d4e78722bf3f/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2024-11-23 18:54:25,992 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d028fee2-1ae5-4220-8d8e-d4e78722bf3f/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 18:54:25,992 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-23 18:54:25,992 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 18:54:25,993 INFO L85 PathProgramCache]: Analyzing trace with hash -2061605462, now seen corresponding path program 2 times [2024-11-23 18:54:25,993 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-23 18:54:25,993 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1479256023] [2024-11-23 18:54:25,993 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-23 18:54:25,993 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 18:54:25,993 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d028fee2-1ae5-4220-8d8e-d4e78722bf3f/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-23 18:54:25,995 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d028fee2-1ae5-4220-8d8e-d4e78722bf3f/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-23 18:54:25,996 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d028fee2-1ae5-4220-8d8e-d4e78722bf3f/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2024-11-23 18:54:26,045 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-11-23 18:54:26,045 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-23 18:54:26,047 INFO L256 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-11-23 18:54:26,048 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-23 18:54:26,441 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2024-11-23 18:54:26,441 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-23 18:54:26,441 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-23 18:54:26,441 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1479256023] [2024-11-23 18:54:26,441 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1479256023] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-23 18:54:26,441 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-23 18:54:26,441 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-11-23 18:54:26,442 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2100358117] [2024-11-23 18:54:26,442 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-23 18:54:26,442 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-23 18:54:26,442 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-23 18:54:26,443 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-23 18:54:26,443 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-23 18:54:26,443 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) [2024-11-23 18:54:26,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-23 18:54:26,848 INFO L93 Difference]: Finished difference Result 136 states and 201 transitions. [2024-11-23 18:54:26,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-23 18:54:26,849 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 [2024-11-23 18:54:26,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-23 18:54:26,851 INFO L225 Difference]: With dead ends: 136 [2024-11-23 18:54:26,851 INFO L226 Difference]: Without dead ends: 120 [2024-11-23 18:54:26,852 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-23 18:54:26,853 INFO L435 NwaCegarLoop]: 62 mSDtfsCounter, 0 mSDsluCounter, 233 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s 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, 0.4s IncrementalHoareTripleChecker+Time [2024-11-23 18:54:26,854 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 295 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-11-23 18:54:26,854 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2024-11-23 18:54:26,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 120. [2024-11-23 18:54:26,868 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) [2024-11-23 18:54:26,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 183 transitions. [2024-11-23 18:54:26,870 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 183 transitions. Word has length 53 [2024-11-23 18:54:26,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-23 18:54:26,870 INFO L471 AbstractCegarLoop]: Abstraction has 120 states and 183 transitions. [2024-11-23 18:54:26,870 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) [2024-11-23 18:54:26,870 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 183 transitions. [2024-11-23 18:54:26,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2024-11-23 18:54:26,871 INFO L210 NwaCegarLoop]: Found error trace [2024-11-23 18:54:26,871 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] [2024-11-23 18:54:26,882 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d028fee2-1ae5-4220-8d8e-d4e78722bf3f/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2024-11-23 18:54:27,072 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d028fee2-1ae5-4220-8d8e-d4e78722bf3f/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 18:54:27,072 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-23 18:54:27,072 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 18:54:27,073 INFO L85 PathProgramCache]: Analyzing trace with hash -1474799448, now seen corresponding path program 1 times [2024-11-23 18:54:27,073 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-23 18:54:27,073 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [73384724] [2024-11-23 18:54:27,073 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 18:54:27,073 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 18:54:27,073 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d028fee2-1ae5-4220-8d8e-d4e78722bf3f/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-23 18:54:27,075 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d028fee2-1ae5-4220-8d8e-d4e78722bf3f/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-23 18:54:27,081 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d028fee2-1ae5-4220-8d8e-d4e78722bf3f/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2024-11-23 18:54:27,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 18:54:27,136 INFO L256 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-11-23 18:54:27,137 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-23 18:54:27,805 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2024-11-23 18:54:27,805 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-23 18:54:29,198 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2024-11-23 18:54:29,198 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-23 18:54:29,198 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [73384724] [2024-11-23 18:54:29,199 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [73384724] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-23 18:54:29,199 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-23 18:54:29,199 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2024-11-23 18:54:29,199 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [14591265] [2024-11-23 18:54:29,199 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-23 18:54:29,199 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-11-23 18:54:29,199 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-23 18:54:29,200 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-11-23 18:54:29,200 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2024-11-23 18:54:29,200 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) [2024-11-23 18:54:30,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-23 18:54:30,629 INFO L93 Difference]: Finished difference Result 229 states and 342 transitions. [2024-11-23 18:54:30,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-23 18:54:30,629 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 [2024-11-23 18:54:30,630 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-23 18:54:30,631 INFO L225 Difference]: With dead ends: 229 [2024-11-23 18:54:30,631 INFO L226 Difference]: Without dead ends: 185 [2024-11-23 18:54:30,632 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2024-11-23 18:54:30,632 INFO L435 NwaCegarLoop]: 84 mSDtfsCounter, 58 mSDsluCounter, 702 mSDsCounter, 0 mSdLazyCounter, 105 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s 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, 1.2s IncrementalHoareTripleChecker+Time [2024-11-23 18:54:30,633 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [58 Valid, 786 Invalid, 108 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 105 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2024-11-23 18:54:30,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2024-11-23 18:54:30,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 150. [2024-11-23 18:54:30,648 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) [2024-11-23 18:54:30,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 240 transitions. [2024-11-23 18:54:30,650 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 240 transitions. Word has length 53 [2024-11-23 18:54:30,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-23 18:54:30,650 INFO L471 AbstractCegarLoop]: Abstraction has 150 states and 240 transitions. [2024-11-23 18:54:30,650 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) [2024-11-23 18:54:30,650 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 240 transitions. [2024-11-23 18:54:30,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2024-11-23 18:54:30,652 INFO L210 NwaCegarLoop]: Found error trace [2024-11-23 18:54:30,652 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] [2024-11-23 18:54:30,662 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d028fee2-1ae5-4220-8d8e-d4e78722bf3f/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2024-11-23 18:54:30,853 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d028fee2-1ae5-4220-8d8e-d4e78722bf3f/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 18:54:30,853 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-23 18:54:30,854 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 18:54:30,854 INFO L85 PathProgramCache]: Analyzing trace with hash -1143048730, now seen corresponding path program 3 times [2024-11-23 18:54:30,854 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-23 18:54:30,854 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1349350763] [2024-11-23 18:54:30,854 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-23 18:54:30,855 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 18:54:30,855 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d028fee2-1ae5-4220-8d8e-d4e78722bf3f/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-23 18:54:30,857 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d028fee2-1ae5-4220-8d8e-d4e78722bf3f/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-23 18:54:30,861 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d028fee2-1ae5-4220-8d8e-d4e78722bf3f/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2024-11-23 18:54:30,964 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-11-23 18:54:30,964 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-23 18:54:30,966 INFO L256 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-11-23 18:54:30,968 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-23 18:54:32,419 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 4 proven. 13 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2024-11-23 18:54:32,421 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-23 18:54:35,280 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 4 proven. 13 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2024-11-23 18:54:35,281 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-23 18:54:35,281 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1349350763] [2024-11-23 18:54:35,281 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1349350763] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-23 18:54:35,281 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-23 18:54:35,281 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2024-11-23 18:54:35,283 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1062246744] [2024-11-23 18:54:35,283 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-23 18:54:35,284 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-11-23 18:54:35,284 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-23 18:54:35,284 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-11-23 18:54:35,285 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=197, Unknown=0, NotChecked=0, Total=240 [2024-11-23 18:54:35,285 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) [2024-11-23 18:54:42,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-23 18:54:42,227 INFO L93 Difference]: Finished difference Result 264 states and 445 transitions. [2024-11-23 18:54:42,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2024-11-23 18:54:42,228 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 [2024-11-23 18:54:42,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-23 18:54:42,230 INFO L225 Difference]: With dead ends: 264 [2024-11-23 18:54:42,230 INFO L226 Difference]: Without dead ends: 245 [2024-11-23 18:54:42,231 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 91 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=103, Invalid=497, Unknown=0, NotChecked=0, Total=600 [2024-11-23 18:54:42,232 INFO L435 NwaCegarLoop]: 67 mSDtfsCounter, 70 mSDsluCounter, 502 mSDsCounter, 0 mSdLazyCounter, 396 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.7s 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, 4.8s IncrementalHoareTripleChecker+Time [2024-11-23 18:54:42,232 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [70 Valid, 569 Invalid, 412 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 396 Invalid, 0 Unknown, 0 Unchecked, 4.8s Time] [2024-11-23 18:54:42,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 245 states. [2024-11-23 18:54:42,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 245 to 155. [2024-11-23 18:54:42,249 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) [2024-11-23 18:54:42,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 267 transitions. [2024-11-23 18:54:42,251 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 267 transitions. Word has length 53 [2024-11-23 18:54:42,251 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-23 18:54:42,251 INFO L471 AbstractCegarLoop]: Abstraction has 155 states and 267 transitions. [2024-11-23 18:54:42,251 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) [2024-11-23 18:54:42,251 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 267 transitions. [2024-11-23 18:54:42,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2024-11-23 18:54:42,253 INFO L210 NwaCegarLoop]: Found error trace [2024-11-23 18:54:42,253 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] [2024-11-23 18:54:42,274 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d028fee2-1ae5-4220-8d8e-d4e78722bf3f/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2024-11-23 18:54:42,454 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d028fee2-1ae5-4220-8d8e-d4e78722bf3f/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 18:54:42,454 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-23 18:54:42,454 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 18:54:42,454 INFO L85 PathProgramCache]: Analyzing trace with hash -1617015324, now seen corresponding path program 2 times [2024-11-23 18:54:42,454 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-23 18:54:42,455 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1895563506] [2024-11-23 18:54:42,455 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-23 18:54:42,455 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 18:54:42,455 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d028fee2-1ae5-4220-8d8e-d4e78722bf3f/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-23 18:54:42,456 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d028fee2-1ae5-4220-8d8e-d4e78722bf3f/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-23 18:54:42,457 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d028fee2-1ae5-4220-8d8e-d4e78722bf3f/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2024-11-23 18:54:42,507 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-11-23 18:54:42,507 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-23 18:54:42,508 INFO L256 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-23 18:54:42,510 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-23 18:54:42,850 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2024-11-23 18:54:42,850 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-23 18:54:42,850 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-23 18:54:42,850 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1895563506] [2024-11-23 18:54:42,851 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1895563506] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-23 18:54:42,851 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-23 18:54:42,851 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-23 18:54:42,851 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1251057200] [2024-11-23 18:54:42,851 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-23 18:54:42,851 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-23 18:54:42,851 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-23 18:54:42,852 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-23 18:54:42,852 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-23 18:54:42,852 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) [2024-11-23 18:54:43,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-23 18:54:43,233 INFO L93 Difference]: Finished difference Result 174 states and 287 transitions. [2024-11-23 18:54:43,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-23 18:54:43,233 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 [2024-11-23 18:54:43,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-23 18:54:43,235 INFO L225 Difference]: With dead ends: 174 [2024-11-23 18:54:43,235 INFO L226 Difference]: Without dead ends: 158 [2024-11-23 18:54:43,235 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 [2024-11-23 18:54:43,235 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 [2024-11-23 18:54:43,236 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] [2024-11-23 18:54:43,236 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2024-11-23 18:54:43,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 154. [2024-11-23 18:54:43,252 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) [2024-11-23 18:54:43,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 265 transitions. [2024-11-23 18:54:43,254 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 265 transitions. Word has length 53 [2024-11-23 18:54:43,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-23 18:54:43,254 INFO L471 AbstractCegarLoop]: Abstraction has 154 states and 265 transitions. [2024-11-23 18:54:43,254 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) [2024-11-23 18:54:43,254 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 265 transitions. [2024-11-23 18:54:43,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2024-11-23 18:54:43,256 INFO L210 NwaCegarLoop]: Found error trace [2024-11-23 18:54:43,256 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] [2024-11-23 18:54:43,266 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d028fee2-1ae5-4220-8d8e-d4e78722bf3f/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2024-11-23 18:54:43,456 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d028fee2-1ae5-4220-8d8e-d4e78722bf3f/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 18:54:43,457 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-23 18:54:43,457 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 18:54:43,457 INFO L85 PathProgramCache]: Analyzing trace with hash -1915623849, now seen corresponding path program 1 times [2024-11-23 18:54:43,458 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-23 18:54:43,458 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [839641213] [2024-11-23 18:54:43,458 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 18:54:43,458 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 18:54:43,458 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d028fee2-1ae5-4220-8d8e-d4e78722bf3f/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-23 18:54:43,462 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d028fee2-1ae5-4220-8d8e-d4e78722bf3f/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-23 18:54:43,464 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d028fee2-1ae5-4220-8d8e-d4e78722bf3f/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2024-11-23 18:54:43,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 18:54:43,520 INFO L256 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 15 conjuncts are in the unsatisfiable core [2024-11-23 18:54:43,521 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-23 18:54:45,800 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 10 proven. 11 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-23 18:54:45,800 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-23 18:54:49,803 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 10 proven. 11 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-23 18:54:49,804 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-23 18:54:49,804 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [839641213] [2024-11-23 18:54:49,804 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [839641213] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-23 18:54:49,804 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-23 18:54:49,804 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2024-11-23 18:54:49,804 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2083938514] [2024-11-23 18:54:49,804 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-23 18:54:49,805 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-11-23 18:54:49,805 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-23 18:54:49,805 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-11-23 18:54:49,805 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=400, Unknown=0, NotChecked=0, Total=462 [2024-11-23 18:54:49,806 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) [2024-11-23 18:55:04,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-23 18:55:04,567 INFO L93 Difference]: Finished difference Result 283 states and 535 transitions. [2024-11-23 18:55:04,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2024-11-23 18:55:04,568 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 [2024-11-23 18:55:04,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-23 18:55:04,570 INFO L225 Difference]: With dead ends: 283 [2024-11-23 18:55:04,570 INFO L226 Difference]: Without dead ends: 262 [2024-11-23 18:55:04,571 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 84 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 427 ImplicationChecksByTransitivity, 12.0s TimeCoverageRelationStatistics Valid=315, Invalid=1847, Unknown=0, NotChecked=0, Total=2162 [2024-11-23 18:55:04,572 INFO L435 NwaCegarLoop]: 64 mSDtfsCounter, 128 mSDsluCounter, 752 mSDsCounter, 0 mSdLazyCounter, 640 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.1s 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, 7.2s IncrementalHoareTripleChecker+Time [2024-11-23 18:55:04,572 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [134 Valid, 816 Invalid, 674 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 640 Invalid, 0 Unknown, 0 Unchecked, 7.2s Time] [2024-11-23 18:55:04,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 262 states. [2024-11-23 18:55:04,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 262 to 157. [2024-11-23 18:55:04,594 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) [2024-11-23 18:55:04,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 271 transitions. [2024-11-23 18:55:04,596 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 271 transitions. Word has length 53 [2024-11-23 18:55:04,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-23 18:55:04,597 INFO L471 AbstractCegarLoop]: Abstraction has 157 states and 271 transitions. [2024-11-23 18:55:04,597 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) [2024-11-23 18:55:04,597 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 271 transitions. [2024-11-23 18:55:04,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2024-11-23 18:55:04,599 INFO L210 NwaCegarLoop]: Found error trace [2024-11-23 18:55:04,599 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] [2024-11-23 18:55:04,609 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d028fee2-1ae5-4220-8d8e-d4e78722bf3f/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2024-11-23 18:55:04,799 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d028fee2-1ae5-4220-8d8e-d4e78722bf3f/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 18:55:04,800 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-23 18:55:04,800 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 18:55:04,800 INFO L85 PathProgramCache]: Analyzing trace with hash -1267341752, now seen corresponding path program 1 times [2024-11-23 18:55:04,801 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-23 18:55:04,801 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1530627882] [2024-11-23 18:55:04,801 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 18:55:04,801 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 18:55:04,801 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d028fee2-1ae5-4220-8d8e-d4e78722bf3f/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-23 18:55:04,803 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d028fee2-1ae5-4220-8d8e-d4e78722bf3f/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-23 18:55:04,806 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d028fee2-1ae5-4220-8d8e-d4e78722bf3f/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2024-11-23 18:55:04,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 18:55:04,863 INFO L256 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 13 conjuncts are in the unsatisfiable core [2024-11-23 18:55:04,865 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-23 18:55:06,609 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 10 proven. 12 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-11-23 18:55:06,609 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-23 18:55:09,576 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 10 proven. 12 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-11-23 18:55:09,576 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-23 18:55:09,577 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1530627882] [2024-11-23 18:55:09,577 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1530627882] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-23 18:55:09,577 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-23 18:55:09,577 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2024-11-23 18:55:09,577 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2107111703] [2024-11-23 18:55:09,577 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-23 18:55:09,577 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-11-23 18:55:09,577 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-23 18:55:09,578 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-11-23 18:55:09,578 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2024-11-23 18:55:09,578 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) [2024-11-23 18:55:19,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-23 18:55:19,690 INFO L93 Difference]: Finished difference Result 321 states and 628 transitions. [2024-11-23 18:55:19,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2024-11-23 18:55:19,690 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 [2024-11-23 18:55:19,691 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-23 18:55:19,693 INFO L225 Difference]: With dead ends: 321 [2024-11-23 18:55:19,693 INFO L226 Difference]: Without dead ends: 308 [2024-11-23 18:55:19,694 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 92 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 176 ImplicationChecksByTransitivity, 6.7s TimeCoverageRelationStatistics Valid=144, Invalid=912, Unknown=0, NotChecked=0, Total=1056 [2024-11-23 18:55:19,695 INFO L435 NwaCegarLoop]: 47 mSDtfsCounter, 126 mSDsluCounter, 591 mSDsCounter, 0 mSdLazyCounter, 499 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.3s 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, 6.4s IncrementalHoareTripleChecker+Time [2024-11-23 18:55:19,696 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [135 Valid, 638 Invalid, 516 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 499 Invalid, 0 Unknown, 0 Unchecked, 6.4s Time] [2024-11-23 18:55:19,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 308 states. [2024-11-23 18:55:19,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 308 to 203. [2024-11-23 18:55:19,725 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) [2024-11-23 18:55:19,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 203 states to 203 states and 400 transitions. [2024-11-23 18:55:19,728 INFO L78 Accepts]: Start accepts. Automaton has 203 states and 400 transitions. Word has length 54 [2024-11-23 18:55:19,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-23 18:55:19,728 INFO L471 AbstractCegarLoop]: Abstraction has 203 states and 400 transitions. [2024-11-23 18:55:19,728 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) [2024-11-23 18:55:19,728 INFO L276 IsEmpty]: Start isEmpty. Operand 203 states and 400 transitions. [2024-11-23 18:55:19,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2024-11-23 18:55:19,731 INFO L210 NwaCegarLoop]: Found error trace [2024-11-23 18:55:19,731 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] [2024-11-23 18:55:19,742 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d028fee2-1ae5-4220-8d8e-d4e78722bf3f/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2024-11-23 18:55:19,933 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d028fee2-1ae5-4220-8d8e-d4e78722bf3f/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 18:55:19,933 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-23 18:55:19,934 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 18:55:19,934 INFO L85 PathProgramCache]: Analyzing trace with hash -457995126, now seen corresponding path program 1 times [2024-11-23 18:55:19,934 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-23 18:55:19,934 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1128633610] [2024-11-23 18:55:19,934 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 18:55:19,934 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 18:55:19,935 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d028fee2-1ae5-4220-8d8e-d4e78722bf3f/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-23 18:55:19,936 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d028fee2-1ae5-4220-8d8e-d4e78722bf3f/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-23 18:55:19,939 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d028fee2-1ae5-4220-8d8e-d4e78722bf3f/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2024-11-23 18:55:20,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 18:55:20,007 INFO L256 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-11-23 18:55:20,008 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-23 18:55:20,138 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2024-11-23 18:55:20,138 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-23 18:55:20,138 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-23 18:55:20,138 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1128633610] [2024-11-23 18:55:20,138 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1128633610] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-23 18:55:20,138 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-23 18:55:20,138 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-23 18:55:20,139 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1158849635] [2024-11-23 18:55:20,139 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-23 18:55:20,139 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-23 18:55:20,139 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-23 18:55:20,140 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-23 18:55:20,140 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-23 18:55:20,140 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) [2024-11-23 18:55:20,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-23 18:55:20,248 INFO L93 Difference]: Finished difference Result 216 states and 413 transitions. [2024-11-23 18:55:20,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-23 18:55:20,252 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 [2024-11-23 18:55:20,253 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-23 18:55:20,254 INFO L225 Difference]: With dead ends: 216 [2024-11-23 18:55:20,255 INFO L226 Difference]: Without dead ends: 177 [2024-11-23 18:55:20,255 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 [2024-11-23 18:55:20,257 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 [2024-11-23 18:55:20,257 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] [2024-11-23 18:55:20,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2024-11-23 18:55:20,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 151. [2024-11-23 18:55:20,279 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) [2024-11-23 18:55:20,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 312 transitions. [2024-11-23 18:55:20,281 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 312 transitions. Word has length 54 [2024-11-23 18:55:20,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-23 18:55:20,281 INFO L471 AbstractCegarLoop]: Abstraction has 151 states and 312 transitions. [2024-11-23 18:55:20,281 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) [2024-11-23 18:55:20,281 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 312 transitions. [2024-11-23 18:55:20,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2024-11-23 18:55:20,284 INFO L210 NwaCegarLoop]: Found error trace [2024-11-23 18:55:20,285 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] [2024-11-23 18:55:20,294 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d028fee2-1ae5-4220-8d8e-d4e78722bf3f/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2024-11-23 18:55:20,485 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d028fee2-1ae5-4220-8d8e-d4e78722bf3f/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 18:55:20,485 INFO L396 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-23 18:55:20,485 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 18:55:20,486 INFO L85 PathProgramCache]: Analyzing trace with hash 1438113164, now seen corresponding path program 2 times [2024-11-23 18:55:20,486 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-23 18:55:20,486 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [347474189] [2024-11-23 18:55:20,486 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-23 18:55:20,486 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 18:55:20,486 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d028fee2-1ae5-4220-8d8e-d4e78722bf3f/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-23 18:55:20,490 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d028fee2-1ae5-4220-8d8e-d4e78722bf3f/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-23 18:55:20,494 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d028fee2-1ae5-4220-8d8e-d4e78722bf3f/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2024-11-23 18:55:20,555 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-11-23 18:55:20,556 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-23 18:55:20,557 INFO L256 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-11-23 18:55:20,558 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-23 18:55:20,886 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2024-11-23 18:55:20,886 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-23 18:55:20,886 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-23 18:55:20,886 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [347474189] [2024-11-23 18:55:20,886 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [347474189] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-23 18:55:20,886 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-23 18:55:20,887 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-23 18:55:20,887 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [777498051] [2024-11-23 18:55:20,887 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-23 18:55:20,887 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-23 18:55:20,887 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-23 18:55:20,888 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-23 18:55:20,888 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-23 18:55:20,888 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) [2024-11-23 18:55:21,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-23 18:55:21,224 INFO L93 Difference]: Finished difference Result 171 states and 332 transitions. [2024-11-23 18:55:21,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-23 18:55:21,225 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 [2024-11-23 18:55:21,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-23 18:55:21,227 INFO L225 Difference]: With dead ends: 171 [2024-11-23 18:55:21,227 INFO L226 Difference]: Without dead ends: 159 [2024-11-23 18:55:21,228 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 [2024-11-23 18:55:21,228 INFO L435 NwaCegarLoop]: 62 mSDtfsCounter, 1 mSDsluCounter, 167 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s 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, 0.3s IncrementalHoareTripleChecker+Time [2024-11-23 18:55:21,229 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 229 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-23 18:55:21,230 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2024-11-23 18:55:21,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 158. [2024-11-23 18:55:21,258 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) [2024-11-23 18:55:21,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 316 transitions. [2024-11-23 18:55:21,260 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 316 transitions. Word has length 54 [2024-11-23 18:55:21,260 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-23 18:55:21,260 INFO L471 AbstractCegarLoop]: Abstraction has 158 states and 316 transitions. [2024-11-23 18:55:21,260 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) [2024-11-23 18:55:21,260 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 316 transitions. [2024-11-23 18:55:21,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2024-11-23 18:55:21,263 INFO L210 NwaCegarLoop]: Found error trace [2024-11-23 18:55:21,263 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] [2024-11-23 18:55:21,272 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d028fee2-1ae5-4220-8d8e-d4e78722bf3f/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2024-11-23 18:55:21,467 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d028fee2-1ae5-4220-8d8e-d4e78722bf3f/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 18:55:21,467 INFO L396 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-23 18:55:21,468 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 18:55:21,468 INFO L85 PathProgramCache]: Analyzing trace with hash -1686260354, now seen corresponding path program 2 times [2024-11-23 18:55:21,468 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-23 18:55:21,468 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1477483081] [2024-11-23 18:55:21,469 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-23 18:55:21,469 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 18:55:21,469 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d028fee2-1ae5-4220-8d8e-d4e78722bf3f/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-23 18:55:21,471 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d028fee2-1ae5-4220-8d8e-d4e78722bf3f/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-23 18:55:21,474 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d028fee2-1ae5-4220-8d8e-d4e78722bf3f/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2024-11-23 18:55:21,564 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-23 18:55:21,564 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-23 18:55:21,565 INFO L256 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-11-23 18:55:21,568 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-23 18:55:23,128 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 17 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2024-11-23 18:55:23,128 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-23 18:55:25,747 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 17 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2024-11-23 18:55:25,747 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-23 18:55:25,748 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1477483081] [2024-11-23 18:55:25,748 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1477483081] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-23 18:55:25,748 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-23 18:55:25,748 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2024-11-23 18:55:25,748 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1166344884] [2024-11-23 18:55:25,748 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-23 18:55:25,748 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-11-23 18:55:25,748 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-23 18:55:25,749 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-11-23 18:55:25,749 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2024-11-23 18:55:25,749 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) [2024-11-23 18:55:33,490 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.82s for a HTC check with result INVALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2024-11-23 18:55:33,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-23 18:55:33,831 INFO L93 Difference]: Finished difference Result 267 states and 501 transitions. [2024-11-23 18:55:33,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2024-11-23 18:55:33,831 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 [2024-11-23 18:55:33,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-23 18:55:33,834 INFO L225 Difference]: With dead ends: 267 [2024-11-23 18:55:33,834 INFO L226 Difference]: Without dead ends: 252 [2024-11-23 18:55:33,835 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 93 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=95, Invalid=457, Unknown=0, NotChecked=0, Total=552 [2024-11-23 18:55:33,836 INFO L435 NwaCegarLoop]: 64 mSDtfsCounter, 72 mSDsluCounter, 613 mSDsCounter, 0 mSdLazyCounter, 406 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.5s 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, 6.6s IncrementalHoareTripleChecker+Time [2024-11-23 18:55:33,836 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [72 Valid, 677 Invalid, 430 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 406 Invalid, 0 Unknown, 0 Unchecked, 6.6s Time] [2024-11-23 18:55:33,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 252 states. [2024-11-23 18:55:33,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 252 to 152. [2024-11-23 18:55:33,867 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) [2024-11-23 18:55:33,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 289 transitions. [2024-11-23 18:55:33,869 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 289 transitions. Word has length 55 [2024-11-23 18:55:33,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-23 18:55:33,869 INFO L471 AbstractCegarLoop]: Abstraction has 152 states and 289 transitions. [2024-11-23 18:55:33,869 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) [2024-11-23 18:55:33,869 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 289 transitions. [2024-11-23 18:55:33,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2024-11-23 18:55:33,872 INFO L210 NwaCegarLoop]: Found error trace [2024-11-23 18:55:33,872 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] [2024-11-23 18:55:33,883 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d028fee2-1ae5-4220-8d8e-d4e78722bf3f/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2024-11-23 18:55:34,076 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d028fee2-1ae5-4220-8d8e-d4e78722bf3f/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 18:55:34,076 INFO L396 AbstractCegarLoop]: === Iteration 25 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-23 18:55:34,076 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 18:55:34,077 INFO L85 PathProgramCache]: Analyzing trace with hash 495166849, now seen corresponding path program 1 times [2024-11-23 18:55:34,077 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-23 18:55:34,077 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2038180997] [2024-11-23 18:55:34,077 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 18:55:34,077 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 18:55:34,077 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d028fee2-1ae5-4220-8d8e-d4e78722bf3f/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-23 18:55:34,079 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d028fee2-1ae5-4220-8d8e-d4e78722bf3f/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-23 18:55:34,080 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d028fee2-1ae5-4220-8d8e-d4e78722bf3f/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2024-11-23 18:55:34,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 18:55:34,142 INFO L256 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-11-23 18:55:34,143 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-23 18:55:34,578 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 29 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-23 18:55:34,578 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-23 18:55:34,578 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-23 18:55:34,579 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2038180997] [2024-11-23 18:55:34,579 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2038180997] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-23 18:55:34,579 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-23 18:55:34,579 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-23 18:55:34,579 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [144824960] [2024-11-23 18:55:34,579 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-23 18:55:34,579 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-23 18:55:34,579 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-23 18:55:34,580 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-23 18:55:34,580 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-23 18:55:34,580 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) [2024-11-23 18:55:35,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-23 18:55:35,226 INFO L93 Difference]: Finished difference Result 270 states and 463 transitions. [2024-11-23 18:55:35,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-23 18:55:35,226 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 [2024-11-23 18:55:35,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-23 18:55:35,228 INFO L225 Difference]: With dead ends: 270 [2024-11-23 18:55:35,228 INFO L226 Difference]: Without dead ends: 159 [2024-11-23 18:55:35,229 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 [2024-11-23 18:55:35,229 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 [2024-11-23 18:55:35,229 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] [2024-11-23 18:55:35,230 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2024-11-23 18:55:35,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 156. [2024-11-23 18:55:35,253 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) [2024-11-23 18:55:35,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 307 transitions. [2024-11-23 18:55:35,255 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 307 transitions. Word has length 55 [2024-11-23 18:55:35,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-23 18:55:35,255 INFO L471 AbstractCegarLoop]: Abstraction has 156 states and 307 transitions. [2024-11-23 18:55:35,255 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) [2024-11-23 18:55:35,255 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 307 transitions. [2024-11-23 18:55:35,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2024-11-23 18:55:35,257 INFO L210 NwaCegarLoop]: Found error trace [2024-11-23 18:55:35,258 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] [2024-11-23 18:55:35,267 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d028fee2-1ae5-4220-8d8e-d4e78722bf3f/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Ended with exit code 0 [2024-11-23 18:55:35,458 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d028fee2-1ae5-4220-8d8e-d4e78722bf3f/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 18:55:35,458 INFO L396 AbstractCegarLoop]: === Iteration 26 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-23 18:55:35,459 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 18:55:35,459 INFO L85 PathProgramCache]: Analyzing trace with hash -469885383, now seen corresponding path program 1 times [2024-11-23 18:55:35,459 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-23 18:55:35,459 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [358581556] [2024-11-23 18:55:35,459 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 18:55:35,459 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 18:55:35,459 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d028fee2-1ae5-4220-8d8e-d4e78722bf3f/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-23 18:55:35,461 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d028fee2-1ae5-4220-8d8e-d4e78722bf3f/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-23 18:55:35,462 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d028fee2-1ae5-4220-8d8e-d4e78722bf3f/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2024-11-23 18:55:35,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 18:55:35,521 INFO L256 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-11-23 18:55:35,523 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-23 18:55:37,200 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 4 proven. 13 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2024-11-23 18:55:37,201 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-23 18:55:40,801 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 4 proven. 13 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2024-11-23 18:55:40,801 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-23 18:55:40,802 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [358581556] [2024-11-23 18:55:40,802 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [358581556] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-23 18:55:40,802 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-23 18:55:40,802 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2024-11-23 18:55:40,802 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [817010762] [2024-11-23 18:55:40,802 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-23 18:55:40,802 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-11-23 18:55:40,802 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-23 18:55:40,803 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-11-23 18:55:40,803 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=321, Unknown=0, NotChecked=0, Total=380 [2024-11-23 18:55:40,805 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) [2024-11-23 18:55:53,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-23 18:55:53,618 INFO L93 Difference]: Finished difference Result 283 states and 584 transitions. [2024-11-23 18:55:53,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2024-11-23 18:55:53,619 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 [2024-11-23 18:55:53,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-23 18:55:53,622 INFO L225 Difference]: With dead ends: 283 [2024-11-23 18:55:53,622 INFO L226 Difference]: Without dead ends: 268 [2024-11-23 18:55:53,623 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 95 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 181 ImplicationChecksByTransitivity, 7.7s TimeCoverageRelationStatistics Valid=193, Invalid=929, Unknown=0, NotChecked=0, Total=1122 [2024-11-23 18:55:53,624 INFO L435 NwaCegarLoop]: 86 mSDtfsCounter, 118 mSDsluCounter, 838 mSDsCounter, 0 mSdLazyCounter, 730 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.6s 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, 8.7s IncrementalHoareTripleChecker+Time [2024-11-23 18:55:53,625 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [118 Valid, 924 Invalid, 754 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 730 Invalid, 0 Unknown, 0 Unchecked, 8.7s Time] [2024-11-23 18:55:53,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 268 states. [2024-11-23 18:55:53,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 268 to 146. [2024-11-23 18:55:53,654 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) [2024-11-23 18:55:53,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 265 transitions. [2024-11-23 18:55:53,655 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 265 transitions. Word has length 56 [2024-11-23 18:55:53,655 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-23 18:55:53,655 INFO L471 AbstractCegarLoop]: Abstraction has 146 states and 265 transitions. [2024-11-23 18:55:53,655 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) [2024-11-23 18:55:53,656 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 265 transitions. [2024-11-23 18:55:53,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2024-11-23 18:55:53,659 INFO L210 NwaCegarLoop]: Found error trace [2024-11-23 18:55:53,659 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] [2024-11-23 18:55:53,668 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d028fee2-1ae5-4220-8d8e-d4e78722bf3f/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Ended with exit code 0 [2024-11-23 18:55:53,859 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d028fee2-1ae5-4220-8d8e-d4e78722bf3f/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 18:55:53,860 INFO L396 AbstractCegarLoop]: === Iteration 27 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-23 18:55:53,860 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 18:55:53,860 INFO L85 PathProgramCache]: Analyzing trace with hash -2036817359, now seen corresponding path program 1 times [2024-11-23 18:55:53,861 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-23 18:55:53,861 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1099487204] [2024-11-23 18:55:53,861 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 18:55:53,861 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 18:55:53,861 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d028fee2-1ae5-4220-8d8e-d4e78722bf3f/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-23 18:55:53,863 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d028fee2-1ae5-4220-8d8e-d4e78722bf3f/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-23 18:55:53,865 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d028fee2-1ae5-4220-8d8e-d4e78722bf3f/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2024-11-23 18:55:53,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 18:55:53,940 INFO L256 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-11-23 18:55:53,942 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-23 18:55:54,536 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 27 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-23 18:55:54,536 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-23 18:55:54,536 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-23 18:55:54,536 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1099487204] [2024-11-23 18:55:54,536 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1099487204] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-23 18:55:54,536 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-23 18:55:54,536 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-11-23 18:55:54,536 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [638453060] [2024-11-23 18:55:54,536 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-23 18:55:54,537 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-23 18:55:54,537 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-23 18:55:54,537 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-23 18:55:54,537 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-11-23 18:55:54,537 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) [2024-11-23 18:55:55,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-23 18:55:55,662 INFO L93 Difference]: Finished difference Result 267 states and 442 transitions. [2024-11-23 18:55:55,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-23 18:55:55,665 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 [2024-11-23 18:55:55,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-23 18:55:55,667 INFO L225 Difference]: With dead ends: 267 [2024-11-23 18:55:55,667 INFO L226 Difference]: Without dead ends: 156 [2024-11-23 18:55:55,668 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 [2024-11-23 18:55:55,668 INFO L435 NwaCegarLoop]: 55 mSDtfsCounter, 17 mSDsluCounter, 146 mSDsCounter, 0 mSdLazyCounter, 85 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s 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, 1.0s IncrementalHoareTripleChecker+Time [2024-11-23 18:55:55,668 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 201 Invalid, 85 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 85 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2024-11-23 18:55:55,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2024-11-23 18:55:55,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 146. [2024-11-23 18:55:55,709 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) [2024-11-23 18:55:55,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 265 transitions. [2024-11-23 18:55:55,710 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 265 transitions. Word has length 56 [2024-11-23 18:55:55,711 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-23 18:55:55,711 INFO L471 AbstractCegarLoop]: Abstraction has 146 states and 265 transitions. [2024-11-23 18:55:55,711 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) [2024-11-23 18:55:55,711 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 265 transitions. [2024-11-23 18:55:55,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2024-11-23 18:55:55,717 INFO L210 NwaCegarLoop]: Found error trace [2024-11-23 18:55:55,717 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] [2024-11-23 18:55:55,738 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d028fee2-1ae5-4220-8d8e-d4e78722bf3f/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Ended with exit code 0 [2024-11-23 18:55:55,921 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d028fee2-1ae5-4220-8d8e-d4e78722bf3f/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 18:55:55,921 INFO L396 AbstractCegarLoop]: === Iteration 28 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-23 18:55:55,921 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 18:55:55,922 INFO L85 PathProgramCache]: Analyzing trace with hash -413109599, now seen corresponding path program 1 times [2024-11-23 18:55:55,922 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-23 18:55:55,922 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1017410669] [2024-11-23 18:55:55,922 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 18:55:55,922 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 18:55:55,922 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d028fee2-1ae5-4220-8d8e-d4e78722bf3f/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-23 18:55:55,924 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d028fee2-1ae5-4220-8d8e-d4e78722bf3f/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-23 18:55:55,925 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d028fee2-1ae5-4220-8d8e-d4e78722bf3f/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2024-11-23 18:55:55,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 18:55:55,990 INFO L256 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 15 conjuncts are in the unsatisfiable core [2024-11-23 18:55:55,993 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-23 18:55:57,138 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2024-11-23 18:55:57,138 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-23 18:55:57,138 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-23 18:55:57,138 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1017410669] [2024-11-23 18:55:57,138 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1017410669] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-23 18:55:57,138 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-23 18:55:57,138 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-11-23 18:55:57,138 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2015470907] [2024-11-23 18:55:57,138 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-23 18:55:57,139 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-11-23 18:55:57,139 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-23 18:55:57,139 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-11-23 18:55:57,139 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2024-11-23 18:55:57,139 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) [2024-11-23 18:55:58,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-23 18:55:58,740 INFO L93 Difference]: Finished difference Result 177 states and 297 transitions. [2024-11-23 18:55:58,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-23 18:55:58,741 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 [2024-11-23 18:55:58,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-23 18:55:58,743 INFO L225 Difference]: With dead ends: 177 [2024-11-23 18:55:58,743 INFO L226 Difference]: Without dead ends: 156 [2024-11-23 18:55:58,743 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-11-23 18:55:58,744 INFO L435 NwaCegarLoop]: 79 mSDtfsCounter, 19 mSDsluCounter, 488 mSDsCounter, 0 mSdLazyCounter, 93 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s 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, 1.3s IncrementalHoareTripleChecker+Time [2024-11-23 18:55:58,745 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 567 Invalid, 94 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 93 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2024-11-23 18:55:58,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2024-11-23 18:55:58,776 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 142. [2024-11-23 18:55:58,777 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) [2024-11-23 18:55:58,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 244 transitions. [2024-11-23 18:55:58,778 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 244 transitions. Word has length 57 [2024-11-23 18:55:58,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-23 18:55:58,779 INFO L471 AbstractCegarLoop]: Abstraction has 142 states and 244 transitions. [2024-11-23 18:55:58,779 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) [2024-11-23 18:55:58,779 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 244 transitions. [2024-11-23 18:55:58,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2024-11-23 18:55:58,781 INFO L210 NwaCegarLoop]: Found error trace [2024-11-23 18:55:58,781 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] [2024-11-23 18:55:58,791 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d028fee2-1ae5-4220-8d8e-d4e78722bf3f/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Ended with exit code 0 [2024-11-23 18:55:58,981 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d028fee2-1ae5-4220-8d8e-d4e78722bf3f/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 18:55:58,981 INFO L396 AbstractCegarLoop]: === Iteration 29 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-23 18:55:58,982 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 18:55:58,982 INFO L85 PathProgramCache]: Analyzing trace with hash 1851614173, now seen corresponding path program 1 times [2024-11-23 18:55:58,982 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-23 18:55:58,982 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1351939801] [2024-11-23 18:55:58,982 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 18:55:58,982 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 18:55:58,982 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d028fee2-1ae5-4220-8d8e-d4e78722bf3f/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-23 18:55:58,984 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d028fee2-1ae5-4220-8d8e-d4e78722bf3f/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-23 18:55:58,985 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d028fee2-1ae5-4220-8d8e-d4e78722bf3f/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2024-11-23 18:55:59,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 18:55:59,050 INFO L256 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-11-23 18:55:59,050 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-23 18:55:59,322 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 32 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-11-23 18:55:59,322 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-23 18:55:59,322 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-23 18:55:59,322 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1351939801] [2024-11-23 18:55:59,322 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1351939801] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-23 18:55:59,322 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-23 18:55:59,322 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-23 18:55:59,322 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1085863927] [2024-11-23 18:55:59,323 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-23 18:55:59,323 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-23 18:55:59,323 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-23 18:55:59,323 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-23 18:55:59,323 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-23 18:55:59,323 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) [2024-11-23 18:55:59,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-23 18:55:59,851 INFO L93 Difference]: Finished difference Result 275 states and 438 transitions. [2024-11-23 18:55:59,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-23 18:55:59,852 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 [2024-11-23 18:55:59,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-23 18:55:59,853 INFO L225 Difference]: With dead ends: 275 [2024-11-23 18:55:59,853 INFO L226 Difference]: Without dead ends: 145 [2024-11-23 18:55:59,854 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 [2024-11-23 18:55:59,855 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 [2024-11-23 18:55:59,855 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] [2024-11-23 18:55:59,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2024-11-23 18:55:59,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 116. [2024-11-23 18:55:59,871 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) [2024-11-23 18:55:59,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 166 transitions. [2024-11-23 18:55:59,872 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 166 transitions. Word has length 57 [2024-11-23 18:55:59,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-23 18:55:59,872 INFO L471 AbstractCegarLoop]: Abstraction has 116 states and 166 transitions. [2024-11-23 18:55:59,872 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) [2024-11-23 18:55:59,872 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 166 transitions. [2024-11-23 18:55:59,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2024-11-23 18:55:59,873 INFO L210 NwaCegarLoop]: Found error trace [2024-11-23 18:55:59,874 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] [2024-11-23 18:55:59,883 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d028fee2-1ae5-4220-8d8e-d4e78722bf3f/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Ended with exit code 0 [2024-11-23 18:56:00,074 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d028fee2-1ae5-4220-8d8e-d4e78722bf3f/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 18:56:00,074 INFO L396 AbstractCegarLoop]: === Iteration 30 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-23 18:56:00,074 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 18:56:00,075 INFO L85 PathProgramCache]: Analyzing trace with hash -1498287313, now seen corresponding path program 2 times [2024-11-23 18:56:00,075 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-23 18:56:00,075 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1808353192] [2024-11-23 18:56:00,075 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-23 18:56:00,075 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 18:56:00,075 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d028fee2-1ae5-4220-8d8e-d4e78722bf3f/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-23 18:56:00,077 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d028fee2-1ae5-4220-8d8e-d4e78722bf3f/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-23 18:56:00,079 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d028fee2-1ae5-4220-8d8e-d4e78722bf3f/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2024-11-23 18:56:00,150 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-23 18:56:00,150 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-23 18:56:00,152 INFO L256 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-23 18:56:00,153 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-23 18:56:01,336 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 25 proven. 16 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-23 18:56:01,336 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-23 18:56:03,787 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 4 proven. 25 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2024-11-23 18:56:03,787 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-23 18:56:03,788 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1808353192] [2024-11-23 18:56:03,788 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1808353192] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-23 18:56:03,788 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-23 18:56:03,788 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2024-11-23 18:56:03,788 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2006440892] [2024-11-23 18:56:03,788 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-23 18:56:03,788 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-11-23 18:56:03,789 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-23 18:56:03,789 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-11-23 18:56:03,789 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=121, Unknown=0, NotChecked=0, Total=182 [2024-11-23 18:56:03,789 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) [2024-11-23 18:56:07,816 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-23 18:56:07,816 INFO L93 Difference]: Finished difference Result 242 states and 343 transitions. [2024-11-23 18:56:07,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-11-23 18:56:07,817 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 [2024-11-23 18:56:07,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-23 18:56:07,819 INFO L225 Difference]: With dead ends: 242 [2024-11-23 18:56:07,819 INFO L226 Difference]: Without dead ends: 145 [2024-11-23 18:56:07,819 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=117, Invalid=189, Unknown=0, NotChecked=0, Total=306 [2024-11-23 18:56:07,820 INFO L435 NwaCegarLoop]: 62 mSDtfsCounter, 65 mSDsluCounter, 473 mSDsCounter, 0 mSdLazyCounter, 242 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s 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, 2.8s IncrementalHoareTripleChecker+Time [2024-11-23 18:56:07,820 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [65 Valid, 535 Invalid, 255 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 242 Invalid, 0 Unknown, 0 Unchecked, 2.8s Time] [2024-11-23 18:56:07,820 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2024-11-23 18:56:07,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 125. [2024-11-23 18:56:07,837 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) [2024-11-23 18:56:07,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 184 transitions. [2024-11-23 18:56:07,838 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 184 transitions. Word has length 57 [2024-11-23 18:56:07,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-23 18:56:07,838 INFO L471 AbstractCegarLoop]: Abstraction has 125 states and 184 transitions. [2024-11-23 18:56:07,838 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) [2024-11-23 18:56:07,839 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 184 transitions. [2024-11-23 18:56:07,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2024-11-23 18:56:07,841 INFO L210 NwaCegarLoop]: Found error trace [2024-11-23 18:56:07,841 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] [2024-11-23 18:56:07,854 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d028fee2-1ae5-4220-8d8e-d4e78722bf3f/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Ended with exit code 0 [2024-11-23 18:56:08,041 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d028fee2-1ae5-4220-8d8e-d4e78722bf3f/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 18:56:08,042 INFO L396 AbstractCegarLoop]: === Iteration 31 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-23 18:56:08,042 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 18:56:08,042 INFO L85 PathProgramCache]: Analyzing trace with hash -1134918380, now seen corresponding path program 1 times [2024-11-23 18:56:08,042 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-23 18:56:08,042 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [984688840] [2024-11-23 18:56:08,042 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 18:56:08,043 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 18:56:08,043 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d028fee2-1ae5-4220-8d8e-d4e78722bf3f/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-23 18:56:08,044 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d028fee2-1ae5-4220-8d8e-d4e78722bf3f/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-23 18:56:08,045 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d028fee2-1ae5-4220-8d8e-d4e78722bf3f/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2024-11-23 18:56:08,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 18:56:08,118 INFO L256 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-11-23 18:56:08,119 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-23 18:56:09,353 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 27 proven. 2 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-23 18:56:09,353 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-23 18:56:11,641 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 4 proven. 13 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2024-11-23 18:56:11,645 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-23 18:56:11,645 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [984688840] [2024-11-23 18:56:11,645 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [984688840] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-23 18:56:11,645 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-23 18:56:11,645 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2024-11-23 18:56:11,645 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [735291537] [2024-11-23 18:56:11,645 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-23 18:56:11,646 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-11-23 18:56:11,646 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-23 18:56:11,646 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-11-23 18:56:11,646 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=117, Unknown=0, NotChecked=0, Total=182 [2024-11-23 18:56:11,647 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) [2024-11-23 18:56:15,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-23 18:56:15,312 INFO L93 Difference]: Finished difference Result 242 states and 336 transitions. [2024-11-23 18:56:15,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-11-23 18:56:15,312 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 [2024-11-23 18:56:15,313 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-23 18:56:15,313 INFO L225 Difference]: With dead ends: 242 [2024-11-23 18:56:15,313 INFO L226 Difference]: Without dead ends: 140 [2024-11-23 18:56:15,314 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=141, Invalid=239, Unknown=0, NotChecked=0, Total=380 [2024-11-23 18:56:15,314 INFO L435 NwaCegarLoop]: 57 mSDtfsCounter, 95 mSDsluCounter, 297 mSDsCounter, 0 mSdLazyCounter, 198 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s 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, 2.5s IncrementalHoareTripleChecker+Time [2024-11-23 18:56:15,315 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [95 Valid, 354 Invalid, 224 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 198 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2024-11-23 18:56:15,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2024-11-23 18:56:15,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 110. [2024-11-23 18:56:15,347 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) [2024-11-23 18:56:15,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 155 transitions. [2024-11-23 18:56:15,348 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 155 transitions. Word has length 58 [2024-11-23 18:56:15,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-23 18:56:15,348 INFO L471 AbstractCegarLoop]: Abstraction has 110 states and 155 transitions. [2024-11-23 18:56:15,348 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) [2024-11-23 18:56:15,348 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 155 transitions. [2024-11-23 18:56:15,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2024-11-23 18:56:15,349 INFO L210 NwaCegarLoop]: Found error trace [2024-11-23 18:56:15,349 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] [2024-11-23 18:56:15,375 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d028fee2-1ae5-4220-8d8e-d4e78722bf3f/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2024-11-23 18:56:15,550 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d028fee2-1ae5-4220-8d8e-d4e78722bf3f/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 18:56:15,550 INFO L396 AbstractCegarLoop]: === Iteration 32 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-23 18:56:15,550 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 18:56:15,550 INFO L85 PathProgramCache]: Analyzing trace with hash 1441260235, now seen corresponding path program 2 times [2024-11-23 18:56:15,551 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-23 18:56:15,551 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [962154483] [2024-11-23 18:56:15,551 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-23 18:56:15,551 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 18:56:15,551 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d028fee2-1ae5-4220-8d8e-d4e78722bf3f/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-23 18:56:15,558 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d028fee2-1ae5-4220-8d8e-d4e78722bf3f/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-23 18:56:15,565 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d028fee2-1ae5-4220-8d8e-d4e78722bf3f/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2024-11-23 18:56:15,656 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-23 18:56:15,656 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-23 18:56:15,658 INFO L256 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 19 conjuncts are in the unsatisfiable core [2024-11-23 18:56:15,660 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-23 18:56:19,579 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 10 proven. 39 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-23 18:56:19,579 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-23 18:56:27,698 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 10 proven. 39 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-23 18:56:27,699 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-23 18:56:27,699 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [962154483] [2024-11-23 18:56:27,699 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [962154483] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-23 18:56:27,699 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-23 18:56:27,699 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 30 [2024-11-23 18:56:27,699 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1120923774] [2024-11-23 18:56:27,699 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-23 18:56:27,700 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2024-11-23 18:56:27,700 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-23 18:56:27,700 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2024-11-23 18:56:27,700 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=752, Unknown=0, NotChecked=0, Total=870 [2024-11-23 18:56:27,701 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) [2024-11-23 18:57:04,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-23 18:57:04,991 INFO L93 Difference]: Finished difference Result 280 states and 477 transitions. [2024-11-23 18:57:04,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2024-11-23 18:57:04,992 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 [2024-11-23 18:57:04,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-23 18:57:04,994 INFO L225 Difference]: With dead ends: 280 [2024-11-23 18:57:04,994 INFO L226 Difference]: Without dead ends: 259 [2024-11-23 18:57:04,997 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 92 SyntacticMatches, 1 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1515 ImplicationChecksByTransitivity, 30.3s TimeCoverageRelationStatistics Valid=1007, Invalid=5155, Unknown=0, NotChecked=0, Total=6162 [2024-11-23 18:57:04,998 INFO L435 NwaCegarLoop]: 78 mSDtfsCounter, 302 mSDsluCounter, 1423 mSDsCounter, 0 mSdLazyCounter, 1499 mSolverCounterSat, 60 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 16.1s 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, 16.4s IncrementalHoareTripleChecker+Time [2024-11-23 18:57:04,998 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [306 Valid, 1501 Invalid, 1559 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 1499 Invalid, 0 Unknown, 0 Unchecked, 16.4s Time] [2024-11-23 18:57:05,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 259 states. [2024-11-23 18:57:05,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 259 to 127. [2024-11-23 18:57:05,028 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) [2024-11-23 18:57:05,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 192 transitions. [2024-11-23 18:57:05,030 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 192 transitions. Word has length 61 [2024-11-23 18:57:05,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-23 18:57:05,031 INFO L471 AbstractCegarLoop]: Abstraction has 127 states and 192 transitions. [2024-11-23 18:57:05,031 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) [2024-11-23 18:57:05,031 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 192 transitions. [2024-11-23 18:57:05,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2024-11-23 18:57:05,032 INFO L210 NwaCegarLoop]: Found error trace [2024-11-23 18:57:05,033 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] [2024-11-23 18:57:05,046 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d028fee2-1ae5-4220-8d8e-d4e78722bf3f/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Ended with exit code 0 [2024-11-23 18:57:05,234 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d028fee2-1ae5-4220-8d8e-d4e78722bf3f/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 18:57:05,234 INFO L396 AbstractCegarLoop]: === Iteration 33 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-23 18:57:05,234 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 18:57:05,235 INFO L85 PathProgramCache]: Analyzing trace with hash 445340997, now seen corresponding path program 2 times [2024-11-23 18:57:05,235 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-23 18:57:05,235 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [557569384] [2024-11-23 18:57:05,235 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-23 18:57:05,235 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 18:57:05,235 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d028fee2-1ae5-4220-8d8e-d4e78722bf3f/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-23 18:57:05,237 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d028fee2-1ae5-4220-8d8e-d4e78722bf3f/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-23 18:57:05,238 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d028fee2-1ae5-4220-8d8e-d4e78722bf3f/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2024-11-23 18:57:05,309 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-23 18:57:05,310 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-23 18:57:05,311 INFO L256 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 18 conjuncts are in the unsatisfiable core [2024-11-23 18:57:05,313 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-23 18:57:08,267 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 4 proven. 41 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2024-11-23 18:57:08,267 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-23 18:57:15,036 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 4 proven. 41 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2024-11-23 18:57:15,036 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-23 18:57:15,037 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [557569384] [2024-11-23 18:57:15,037 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [557569384] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-23 18:57:15,037 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-23 18:57:15,037 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 28 [2024-11-23 18:57:15,037 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [799820063] [2024-11-23 18:57:15,037 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-23 18:57:15,037 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2024-11-23 18:57:15,037 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-23 18:57:15,038 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2024-11-23 18:57:15,038 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=641, Unknown=0, NotChecked=0, Total=756 [2024-11-23 18:57:15,039 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) [2024-11-23 18:57:37,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-23 18:57:37,361 INFO L93 Difference]: Finished difference Result 274 states and 407 transitions. [2024-11-23 18:57:37,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2024-11-23 18:57:37,362 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 [2024-11-23 18:57:37,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-23 18:57:37,363 INFO L225 Difference]: With dead ends: 274 [2024-11-23 18:57:37,364 INFO L226 Difference]: Without dead ends: 259 [2024-11-23 18:57:37,365 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 107 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 409 ImplicationChecksByTransitivity, 16.5s TimeCoverageRelationStatistics Valid=473, Invalid=1977, Unknown=0, NotChecked=0, Total=2450 [2024-11-23 18:57:37,366 INFO L435 NwaCegarLoop]: 72 mSDtfsCounter, 380 mSDsluCounter, 1117 mSDsCounter, 0 mSdLazyCounter, 1235 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 13.0s 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, 13.3s IncrementalHoareTripleChecker+Time [2024-11-23 18:57:37,366 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [380 Valid, 1189 Invalid, 1281 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 1235 Invalid, 0 Unknown, 0 Unchecked, 13.3s Time] [2024-11-23 18:57:37,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 259 states. [2024-11-23 18:57:37,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 259 to 132. [2024-11-23 18:57:37,389 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) [2024-11-23 18:57:37,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 198 transitions. [2024-11-23 18:57:37,390 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 198 transitions. Word has length 64 [2024-11-23 18:57:37,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-23 18:57:37,391 INFO L471 AbstractCegarLoop]: Abstraction has 132 states and 198 transitions. [2024-11-23 18:57:37,391 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) [2024-11-23 18:57:37,391 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 198 transitions. [2024-11-23 18:57:37,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2024-11-23 18:57:37,392 INFO L210 NwaCegarLoop]: Found error trace [2024-11-23 18:57:37,392 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] [2024-11-23 18:57:37,402 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d028fee2-1ae5-4220-8d8e-d4e78722bf3f/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Ended with exit code 0 [2024-11-23 18:57:37,592 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d028fee2-1ae5-4220-8d8e-d4e78722bf3f/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 18:57:37,593 INFO L396 AbstractCegarLoop]: === Iteration 34 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-23 18:57:37,593 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 18:57:37,593 INFO L85 PathProgramCache]: Analyzing trace with hash -2070662880, now seen corresponding path program 2 times [2024-11-23 18:57:37,593 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-23 18:57:37,594 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1936813330] [2024-11-23 18:57:37,594 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-23 18:57:37,594 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 18:57:37,594 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d028fee2-1ae5-4220-8d8e-d4e78722bf3f/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-23 18:57:37,595 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d028fee2-1ae5-4220-8d8e-d4e78722bf3f/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-23 18:57:37,601 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d028fee2-1ae5-4220-8d8e-d4e78722bf3f/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2024-11-23 18:57:37,674 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-23 18:57:37,674 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-23 18:57:37,676 INFO L256 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-11-23 18:57:37,677 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-23 18:57:38,381 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2024-11-23 18:57:38,381 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-23 18:57:39,287 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-23 18:57:39,287 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1936813330] [2024-11-23 18:57:39,287 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1936813330] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-23 18:57:39,287 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1543208363] [2024-11-23 18:57:39,287 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-23 18:57:39,287 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-11-23 18:57:39,287 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d028fee2-1ae5-4220-8d8e-d4e78722bf3f/bin/uautomizer-verify-LYvppIcaGC/cvc4 [2024-11-23 18:57:39,293 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d028fee2-1ae5-4220-8d8e-d4e78722bf3f/bin/uautomizer-verify-LYvppIcaGC/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2024-11-23 18:57:39,295 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d028fee2-1ae5-4220-8d8e-d4e78722bf3f/bin/uautomizer-verify-LYvppIcaGC/cvc4 --incremental --print-success --lang smt (36)] Waiting until timeout for monitored process [2024-11-23 18:57:39,434 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-23 18:57:39,434 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-23 18:57:39,435 INFO L256 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-11-23 18:57:39,436 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-23 18:57:41,758 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 27 proven. 30 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-23 18:57:41,758 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-23 18:57:45,643 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 4 proven. 41 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2024-11-23 18:57:45,643 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1543208363] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-23 18:57:45,643 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-23 18:57:45,643 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10, 10] total 24 [2024-11-23 18:57:45,644 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1410735944] [2024-11-23 18:57:45,644 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-23 18:57:45,644 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-11-23 18:57:45,644 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-23 18:57:45,645 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-11-23 18:57:45,645 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=584, Unknown=0, NotChecked=0, Total=702 [2024-11-23 18:57:45,645 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) [2024-11-23 18:58:00,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-23 18:58:00,695 INFO L93 Difference]: Finished difference Result 294 states and 412 transitions. [2024-11-23 18:58:00,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2024-11-23 18:58:00,696 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 [2024-11-23 18:58:00,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-23 18:58:00,697 INFO L225 Difference]: With dead ends: 294 [2024-11-23 18:58:00,697 INFO L226 Difference]: Without dead ends: 185 [2024-11-23 18:58:00,699 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 237 GetRequests, 193 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 286 ImplicationChecksByTransitivity, 11.6s TimeCoverageRelationStatistics Valid=432, Invalid=1638, Unknown=0, NotChecked=0, Total=2070 [2024-11-23 18:58:00,699 INFO L435 NwaCegarLoop]: 58 mSDtfsCounter, 285 mSDsluCounter, 768 mSDsCounter, 0 mSdLazyCounter, 934 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.4s 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, 9.5s IncrementalHoareTripleChecker+Time [2024-11-23 18:58:00,699 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [285 Valid, 826 Invalid, 959 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 934 Invalid, 0 Unknown, 0 Unchecked, 9.5s Time] [2024-11-23 18:58:00,700 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2024-11-23 18:58:00,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 117. [2024-11-23 18:58:00,721 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) [2024-11-23 18:58:00,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 168 transitions. [2024-11-23 18:58:00,721 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 168 transitions. Word has length 66 [2024-11-23 18:58:00,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-23 18:58:00,722 INFO L471 AbstractCegarLoop]: Abstraction has 117 states and 168 transitions. [2024-11-23 18:58:00,722 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) [2024-11-23 18:58:00,722 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 168 transitions. [2024-11-23 18:58:00,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2024-11-23 18:58:00,722 INFO L210 NwaCegarLoop]: Found error trace [2024-11-23 18:58:00,723 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] [2024-11-23 18:58:00,725 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d028fee2-1ae5-4220-8d8e-d4e78722bf3f/bin/uautomizer-verify-LYvppIcaGC/cvc4 --incremental --print-success --lang smt (36)] Ended with exit code 0 [2024-11-23 18:58:00,930 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d028fee2-1ae5-4220-8d8e-d4e78722bf3f/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2024-11-23 18:58:01,123 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d028fee2-1ae5-4220-8d8e-d4e78722bf3f/bin/uautomizer-verify-LYvppIcaGC/cvc4 --incremental --print-success --lang smt,35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d028fee2-1ae5-4220-8d8e-d4e78722bf3f/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 18:58:01,123 INFO L396 AbstractCegarLoop]: === Iteration 35 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-23 18:58:01,124 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 18:58:01,124 INFO L85 PathProgramCache]: Analyzing trace with hash 1716175709, now seen corresponding path program 3 times [2024-11-23 18:58:01,124 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-23 18:58:01,124 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [672798378] [2024-11-23 18:58:01,124 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-23 18:58:01,124 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 18:58:01,124 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d028fee2-1ae5-4220-8d8e-d4e78722bf3f/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-23 18:58:01,126 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d028fee2-1ae5-4220-8d8e-d4e78722bf3f/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-23 18:58:01,127 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d028fee2-1ae5-4220-8d8e-d4e78722bf3f/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2024-11-23 18:58:01,227 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 14 check-sat command(s) [2024-11-23 18:58:01,227 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-23 18:58:01,229 INFO L256 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-11-23 18:58:01,230 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-23 18:58:03,984 INFO L134 CoverageAnalysis]: Checked inductivity of 131 backedges. 25 proven. 100 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-23 18:58:03,984 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-23 18:58:10,570 INFO L134 CoverageAnalysis]: Checked inductivity of 131 backedges. 4 proven. 109 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2024-11-23 18:58:10,570 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-23 18:58:10,570 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [672798378] [2024-11-23 18:58:10,571 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [672798378] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-23 18:58:10,571 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-23 18:58:10,571 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2024-11-23 18:58:10,571 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1237166966] [2024-11-23 18:58:10,571 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-23 18:58:10,571 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2024-11-23 18:58:10,571 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-23 18:58:10,572 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2024-11-23 18:58:10,572 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=193, Invalid=457, Unknown=0, NotChecked=0, Total=650 [2024-11-23 18:58:10,572 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) [2024-11-23 18:58:23,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-23 18:58:23,319 INFO L93 Difference]: Finished difference Result 275 states and 397 transitions. [2024-11-23 18:58:23,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2024-11-23 18:58:23,320 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 [2024-11-23 18:58:23,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-23 18:58:23,321 INFO L225 Difference]: With dead ends: 275 [2024-11-23 18:58:23,321 INFO L226 Difference]: Without dead ends: 166 [2024-11-23 18:58:23,321 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 113 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 12.9s TimeCoverageRelationStatistics Valid=453, Invalid=807, Unknown=0, NotChecked=0, Total=1260 [2024-11-23 18:58:23,322 INFO L435 NwaCegarLoop]: 74 mSDtfsCounter, 198 mSDsluCounter, 835 mSDsCounter, 0 mSdLazyCounter, 594 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.2s 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, 6.4s IncrementalHoareTripleChecker+Time [2024-11-23 18:58:23,322 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [198 Valid, 909 Invalid, 629 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 594 Invalid, 0 Unknown, 0 Unchecked, 6.4s Time] [2024-11-23 18:58:23,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2024-11-23 18:58:23,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 134. [2024-11-23 18:58:23,337 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) [2024-11-23 18:58:23,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 202 transitions. [2024-11-23 18:58:23,337 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 202 transitions. Word has length 69 [2024-11-23 18:58:23,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-23 18:58:23,338 INFO L471 AbstractCegarLoop]: Abstraction has 134 states and 202 transitions. [2024-11-23 18:58:23,338 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) [2024-11-23 18:58:23,338 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 202 transitions. [2024-11-23 18:58:23,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2024-11-23 18:58:23,338 INFO L210 NwaCegarLoop]: Found error trace [2024-11-23 18:58:23,338 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] [2024-11-23 18:58:23,344 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d028fee2-1ae5-4220-8d8e-d4e78722bf3f/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Ended with exit code 0 [2024-11-23 18:58:23,539 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d028fee2-1ae5-4220-8d8e-d4e78722bf3f/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 18:58:23,539 INFO L396 AbstractCegarLoop]: === Iteration 36 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-23 18:58:23,539 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 18:58:23,539 INFO L85 PathProgramCache]: Analyzing trace with hash -2032484429, now seen corresponding path program 3 times [2024-11-23 18:58:23,539 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-23 18:58:23,539 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [491350923] [2024-11-23 18:58:23,539 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-23 18:58:23,539 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 18:58:23,540 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d028fee2-1ae5-4220-8d8e-d4e78722bf3f/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-23 18:58:23,541 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d028fee2-1ae5-4220-8d8e-d4e78722bf3f/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-23 18:58:23,542 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d028fee2-1ae5-4220-8d8e-d4e78722bf3f/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2024-11-23 18:58:23,667 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 17 check-sat command(s) [2024-11-23 18:58:23,668 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-23 18:58:23,669 INFO L256 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 27 conjuncts are in the unsatisfiable core [2024-11-23 18:58:23,671 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-23 18:58:31,357 INFO L134 CoverageAnalysis]: Checked inductivity of 213 backedges. 10 proven. 191 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-23 18:58:31,358 INFO L312 TraceCheckSpWp]: Computing backward predicates...