./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/combinations/square_7+soft_float_3a.c.cil.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version d790fecc Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c49d284e-bc07-42e7-90ac-bbc98e65a8a0/bin/uautomizer-verify-aQ6SnzHsRB/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c49d284e-bc07-42e7-90ac-bbc98e65a8a0/bin/uautomizer-verify-aQ6SnzHsRB/plugins/org.eclipse.equinox.launcher_1.6.800.v20240513-1750.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c49d284e-bc07-42e7-90ac-bbc98e65a8a0/bin/uautomizer-verify-aQ6SnzHsRB/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c49d284e-bc07-42e7-90ac-bbc98e65a8a0/bin/uautomizer-verify-aQ6SnzHsRB/config/AutomizerReach.xml -i ../../sv-benchmarks/c/combinations/square_7+soft_float_3a.c.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c49d284e-bc07-42e7-90ac-bbc98e65a8a0/bin/uautomizer-verify-aQ6SnzHsRB/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c49d284e-bc07-42e7-90ac-bbc98e65a8a0/bin/uautomizer-verify-aQ6SnzHsRB --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash bf0fb52bead8e180875472b49ad053a30663ea61c3025c1e008ec598b0fa4db0 --- Real Ultimate output --- This is Ultimate 0.3.0-dev-d790fec [2024-11-27 20:22:24,101 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-27 20:22:24,173 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c49d284e-bc07-42e7-90ac-bbc98e65a8a0/bin/uautomizer-verify-aQ6SnzHsRB/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-11-27 20:22:24,179 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-27 20:22:24,180 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-27 20:22:24,210 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-27 20:22:24,210 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-27 20:22:24,211 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-27 20:22:24,211 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-27 20:22:24,211 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-27 20:22:24,212 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-27 20:22:24,212 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-27 20:22:24,212 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-27 20:22:24,212 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-27 20:22:24,212 INFO L153 SettingsManager]: * Use SBE=true [2024-11-27 20:22:24,213 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-27 20:22:24,213 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-27 20:22:24,213 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-27 20:22:24,213 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-27 20:22:24,213 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-27 20:22:24,214 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-27 20:22:24,214 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-27 20:22:24,214 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-27 20:22:24,214 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-27 20:22:24,214 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-27 20:22:24,214 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-27 20:22:24,214 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2024-11-27 20:22:24,214 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-27 20:22:24,215 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2024-11-27 20:22:24,215 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-27 20:22:24,215 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-27 20:22:24,215 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-27 20:22:24,215 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-27 20:22:24,215 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-27 20:22:24,215 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-27 20:22:24,216 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-27 20:22:24,216 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-27 20:22:24,216 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-27 20:22:24,216 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-27 20:22:24,216 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-27 20:22:24,216 INFO L153 SettingsManager]: * Compute procedure contracts=false [2024-11-27 20:22:24,216 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-27 20:22:24,217 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-27 20:22:24,217 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-27 20:22:24,217 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-27 20:22:24,217 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-27 20:22:24,217 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-27 20:22:24,217 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-27 20:22:24,217 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_c49d284e-bc07-42e7-90ac-bbc98e65a8a0/bin/uautomizer-verify-aQ6SnzHsRB Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> bf0fb52bead8e180875472b49ad053a30663ea61c3025c1e008ec598b0fa4db0 [2024-11-27 20:22:24,549 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-27 20:22:24,567 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-27 20:22:24,569 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-27 20:22:24,572 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-27 20:22:24,572 INFO L274 PluginConnector]: CDTParser initialized [2024-11-27 20:22:24,574 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c49d284e-bc07-42e7-90ac-bbc98e65a8a0/bin/uautomizer-verify-aQ6SnzHsRB/../../sv-benchmarks/c/combinations/square_7+soft_float_3a.c.cil.c [2024-11-27 20:22:27,580 INFO L533 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c49d284e-bc07-42e7-90ac-bbc98e65a8a0/bin/uautomizer-verify-aQ6SnzHsRB/data/c2d41a3c9/0b6feaa37e66443e8e77aa805582bf67/FLAGb757c68a5 [2024-11-27 20:22:27,955 INFO L384 CDTParser]: Found 1 translation units. [2024-11-27 20:22:27,955 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c49d284e-bc07-42e7-90ac-bbc98e65a8a0/sv-benchmarks/c/combinations/square_7+soft_float_3a.c.cil.c [2024-11-27 20:22:27,966 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c49d284e-bc07-42e7-90ac-bbc98e65a8a0/bin/uautomizer-verify-aQ6SnzHsRB/data/c2d41a3c9/0b6feaa37e66443e8e77aa805582bf67/FLAGb757c68a5 [2024-11-27 20:22:27,983 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c49d284e-bc07-42e7-90ac-bbc98e65a8a0/bin/uautomizer-verify-aQ6SnzHsRB/data/c2d41a3c9/0b6feaa37e66443e8e77aa805582bf67 [2024-11-27 20:22:27,986 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-27 20:22:27,988 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-27 20:22:27,993 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-27 20:22:27,993 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-27 20:22:28,001 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-27 20:22:28,002 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.11 08:22:27" (1/1) ... [2024-11-27 20:22:28,003 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@e5998c7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 08:22:28, skipping insertion in model container [2024-11-27 20:22:28,003 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.11 08:22:27" (1/1) ... [2024-11-27 20:22:28,044 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-27 20:22:28,277 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_c49d284e-bc07-42e7-90ac-bbc98e65a8a0/sv-benchmarks/c/combinations/square_7+soft_float_3a.c.cil.c[1995,2008] [2024-11-27 20:22:28,288 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_c49d284e-bc07-42e7-90ac-bbc98e65a8a0/sv-benchmarks/c/combinations/square_7+soft_float_3a.c.cil.c[2364,2377] [2024-11-27 20:22:28,366 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-27 20:22:28,377 INFO L200 MainTranslator]: Completed pre-run [2024-11-27 20:22:28,398 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_c49d284e-bc07-42e7-90ac-bbc98e65a8a0/sv-benchmarks/c/combinations/square_7+soft_float_3a.c.cil.c[1995,2008] [2024-11-27 20:22:28,404 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_c49d284e-bc07-42e7-90ac-bbc98e65a8a0/sv-benchmarks/c/combinations/square_7+soft_float_3a.c.cil.c[2364,2377] [2024-11-27 20:22:28,462 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-27 20:22:28,482 INFO L204 MainTranslator]: Completed translation [2024-11-27 20:22:28,483 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 08:22:28 WrapperNode [2024-11-27 20:22:28,483 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-27 20:22:28,484 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-27 20:22:28,484 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-27 20:22:28,485 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-27 20:22:28,500 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 08:22:28" (1/1) ... [2024-11-27 20:22:28,513 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 08:22:28" (1/1) ... [2024-11-27 20:22:28,559 INFO L138 Inliner]: procedures = 27, calls = 17, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 168 [2024-11-27 20:22:28,560 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-27 20:22:28,564 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-27 20:22:28,565 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-27 20:22:28,565 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-27 20:22:28,575 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 08:22:28" (1/1) ... [2024-11-27 20:22:28,576 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 08:22:28" (1/1) ... [2024-11-27 20:22:28,583 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 08:22:28" (1/1) ... [2024-11-27 20:22:28,612 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]. [2024-11-27 20:22:28,613 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 08:22:28" (1/1) ... [2024-11-27 20:22:28,616 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 08:22:28" (1/1) ... [2024-11-27 20:22:28,626 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 08:22:28" (1/1) ... [2024-11-27 20:22:28,630 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 08:22:28" (1/1) ... [2024-11-27 20:22:28,639 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 08:22:28" (1/1) ... [2024-11-27 20:22:28,640 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 08:22:28" (1/1) ... [2024-11-27 20:22:28,645 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 08:22:28" (1/1) ... [2024-11-27 20:22:28,648 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-27 20:22:28,651 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-27 20:22:28,652 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-27 20:22:28,652 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-27 20:22:28,653 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 08:22:28" (1/1) ... [2024-11-27 20:22:28,664 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-27 20:22:28,678 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c49d284e-bc07-42e7-90ac-bbc98e65a8a0/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 20:22:28,695 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c49d284e-bc07-42e7-90ac-bbc98e65a8a0/bin/uautomizer-verify-aQ6SnzHsRB/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-11-27 20:22:28,701 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c49d284e-bc07-42e7-90ac-bbc98e65a8a0/bin/uautomizer-verify-aQ6SnzHsRB/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-11-27 20:22:28,733 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-27 20:22:28,734 INFO L130 BoogieDeclarations]: Found specification of procedure base2flt [2024-11-27 20:22:28,734 INFO L138 BoogieDeclarations]: Found implementation of procedure base2flt [2024-11-27 20:22:28,734 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-27 20:22:28,734 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-27 20:22:28,734 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-27 20:22:28,735 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2024-11-27 20:22:28,735 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2024-11-27 20:22:28,836 INFO L234 CfgBuilder]: Building ICFG [2024-11-27 20:22:28,840 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-27 20:22:29,480 INFO L? ?]: Removed 74 outVars from TransFormulas that were not future-live. [2024-11-27 20:22:29,481 INFO L283 CfgBuilder]: Performing block encoding [2024-11-27 20:22:29,501 INFO L307 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-27 20:22:29,504 INFO L312 CfgBuilder]: Removed 4 assume(true) statements. [2024-11-27 20:22:29,504 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.11 08:22:29 BoogieIcfgContainer [2024-11-27 20:22:29,505 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-27 20:22:29,510 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-27 20:22:29,510 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-27 20:22:29,517 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-27 20:22:29,518 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.11 08:22:27" (1/3) ... [2024-11-27 20:22:29,519 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@78f47c1f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.11 08:22:29, skipping insertion in model container [2024-11-27 20:22:29,520 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 08:22:28" (2/3) ... [2024-11-27 20:22:29,520 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@78f47c1f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.11 08:22:29, skipping insertion in model container [2024-11-27 20:22:29,520 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.11 08:22:29" (3/3) ... [2024-11-27 20:22:29,522 INFO L128 eAbstractionObserver]: Analyzing ICFG square_7+soft_float_3a.c.cil.c [2024-11-27 20:22:29,542 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-27 20:22:29,544 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG square_7+soft_float_3a.c.cil.c that has 3 procedures, 81 locations, 1 initial locations, 2 loop locations, and 2 error locations. [2024-11-27 20:22:29,608 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-27 20:22:29,626 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;@60d4f532, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-27 20:22:29,626 INFO L334 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2024-11-27 20:22:29,632 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) [2024-11-27 20:22:29,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2024-11-27 20:22:29,639 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 20:22:29,639 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-11-27 20:22:29,640 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-27 20:22:29,647 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 20:22:29,648 INFO L85 PathProgramCache]: Analyzing trace with hash 1530844763, now seen corresponding path program 1 times [2024-11-27 20:22:29,658 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 20:22:29,658 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [158869430] [2024-11-27 20:22:29,658 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 20:22:29,659 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 20:22:29,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 20:22:29,802 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-27 20:22:29,803 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 20:22:29,804 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [158869430] [2024-11-27 20:22:29,807 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [158869430] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-27 20:22:29,807 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-27 20:22:29,808 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-27 20:22:29,809 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [341295989] [2024-11-27 20:22:29,810 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-27 20:22:29,813 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-11-27 20:22:29,813 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 20:22:29,831 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-11-27 20:22:29,832 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-11-27 20:22:29,834 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) [2024-11-27 20:22:29,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 20:22:29,863 INFO L93 Difference]: Finished difference Result 157 states and 239 transitions. [2024-11-27 20:22:29,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-11-27 20:22:29,865 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 [2024-11-27 20:22:29,865 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 20:22:29,872 INFO L225 Difference]: With dead ends: 157 [2024-11-27 20:22:29,872 INFO L226 Difference]: Without dead ends: 72 [2024-11-27 20:22:29,876 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 [2024-11-27 20:22:29,879 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 [2024-11-27 20:22:29,880 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] [2024-11-27 20:22:29,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2024-11-27 20:22:29,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 72. [2024-11-27 20:22:29,942 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) [2024-11-27 20:22:29,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 101 transitions. [2024-11-27 20:22:29,950 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 101 transitions. Word has length 7 [2024-11-27 20:22:29,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-27 20:22:29,950 INFO L471 AbstractCegarLoop]: Abstraction has 72 states and 101 transitions. [2024-11-27 20:22:29,951 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) [2024-11-27 20:22:29,951 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 101 transitions. [2024-11-27 20:22:29,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2024-11-27 20:22:29,952 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 20:22:29,952 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-11-27 20:22:29,952 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-27 20:22:29,952 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-27 20:22:29,953 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 20:22:29,953 INFO L85 PathProgramCache]: Analyzing trace with hash 1530904345, now seen corresponding path program 1 times [2024-11-27 20:22:29,954 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 20:22:29,954 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1320420234] [2024-11-27 20:22:29,954 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 20:22:29,954 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 20:22:29,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-11-27 20:22:29,976 INFO L357 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-11-27 20:22:29,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-11-27 20:22:30,005 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2024-11-27 20:22:30,005 INFO L340 BasicCegarLoop]: Counterexample is feasible [2024-11-27 20:22:30,007 INFO L782 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (1 of 2 remaining) [2024-11-27 20:22:30,011 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2024-11-27 20:22:30,012 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-27 20:22:30,016 INFO L422 BasicCegarLoop]: Path program histogram: [1, 1] [2024-11-27 20:22:30,031 INFO L170 ceAbstractionStarter]: Computing trace abstraction results [2024-11-27 20:22:30,035 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 27.11 08:22:30 BoogieIcfgContainer [2024-11-27 20:22:30,035 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2024-11-27 20:22:30,036 INFO L112 PluginConnector]: ------------------------Witness Printer---------------------------- [2024-11-27 20:22:30,036 INFO L270 PluginConnector]: Initializing Witness Printer... [2024-11-27 20:22:30,036 INFO L274 PluginConnector]: Witness Printer initialized [2024-11-27 20:22:30,038 INFO L184 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.11 08:22:29" (3/4) ... [2024-11-27 20:22:30,041 INFO L149 WitnessPrinter]: No result that supports witness generation found [2024-11-27 20:22:30,042 INFO L131 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2024-11-27 20:22:30,044 INFO L158 Benchmark]: Toolchain (without parser) took 2055.75ms. Allocated memory is still 117.4MB. Free memory was 94.1MB in the beginning and 85.4MB in the end (delta: 8.7MB). Peak memory consumption was 5.5MB. Max. memory is 16.1GB. [2024-11-27 20:22:30,044 INFO L158 Benchmark]: CDTParser took 0.45ms. Allocated memory is still 167.8MB. Free memory is still 103.2MB. There was no memory consumed. Max. memory is 16.1GB. [2024-11-27 20:22:30,045 INFO L158 Benchmark]: CACSL2BoogieTranslator took 490.92ms. Allocated memory is still 117.4MB. Free memory was 93.7MB in the beginning and 79.5MB in the end (delta: 14.2MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2024-11-27 20:22:30,046 INFO L158 Benchmark]: Boogie Procedure Inliner took 75.61ms. Allocated memory is still 117.4MB. Free memory was 79.5MB in the beginning and 77.6MB in the end (delta: 1.9MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2024-11-27 20:22:30,046 INFO L158 Benchmark]: Boogie Preprocessor took 86.16ms. Allocated memory is still 117.4MB. Free memory was 77.6MB in the beginning and 75.6MB in the end (delta: 1.9MB). There was no memory consumed. Max. memory is 16.1GB. [2024-11-27 20:22:30,047 INFO L158 Benchmark]: RCFGBuilder took 853.39ms. Allocated memory is still 117.4MB. Free memory was 75.6MB in the beginning and 54.6MB in the end (delta: 21.1MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. [2024-11-27 20:22:30,047 INFO L158 Benchmark]: TraceAbstraction took 524.88ms. Allocated memory is still 117.4MB. Free memory was 53.9MB in the beginning and 85.4MB in the end (delta: -31.5MB). There was no memory consumed. Max. memory is 16.1GB. [2024-11-27 20:22:30,047 INFO L158 Benchmark]: Witness Printer took 6.75ms. Allocated memory is still 117.4MB. Free memory was 85.4MB in the beginning and 85.4MB in the end (delta: 21.0kB). There was no memory consumed. Max. memory is 16.1GB. [2024-11-27 20:22:30,053 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 167.8MB. Free memory is still 103.2MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 490.92ms. Allocated memory is still 117.4MB. Free memory was 93.7MB in the beginning and 79.5MB in the end (delta: 14.2MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 75.61ms. Allocated memory is still 117.4MB. Free memory was 79.5MB in the beginning and 77.6MB in the end (delta: 1.9MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Boogie Preprocessor took 86.16ms. Allocated memory is still 117.4MB. Free memory was 77.6MB in the beginning and 75.6MB in the end (delta: 1.9MB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 853.39ms. Allocated memory is still 117.4MB. Free memory was 75.6MB in the beginning and 54.6MB in the end (delta: 21.1MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. * TraceAbstraction took 524.88ms. Allocated memory is still 117.4MB. Free memory was 53.9MB in the beginning and 85.4MB in the end (delta: -31.5MB). There was no memory consumed. Max. memory is 16.1GB. * Witness Printer took 6.75ms. Allocated memory is still 117.4MB. Free memory was 85.4MB in the beginning and 85.4MB 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 < 1.4f) [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: 0.1s AutomataMinimizationTime, 1 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.0s InterpolantComputationTime, 14 NumberOfCodeBlocks, 14 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 6 ConstructedInterpolants, 0 QuantifiedInterpolants, 6 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 1 InterpolantComputations, 1 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available, ConComCheckerStatistics: No data available RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces [2024-11-27 20:22:30,074 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c49d284e-bc07-42e7-90ac-bbc98e65a8a0/bin/uautomizer-verify-aQ6SnzHsRB/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Ended with exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c49d284e-bc07-42e7-90ac-bbc98e65a8a0/bin/uautomizer-verify-aQ6SnzHsRB/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c49d284e-bc07-42e7-90ac-bbc98e65a8a0/bin/uautomizer-verify-aQ6SnzHsRB/plugins/org.eclipse.equinox.launcher_1.6.800.v20240513-1750.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c49d284e-bc07-42e7-90ac-bbc98e65a8a0/bin/uautomizer-verify-aQ6SnzHsRB/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c49d284e-bc07-42e7-90ac-bbc98e65a8a0/bin/uautomizer-verify-aQ6SnzHsRB/config/AutomizerReach.xml -i ../../sv-benchmarks/c/combinations/square_7+soft_float_3a.c.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c49d284e-bc07-42e7-90ac-bbc98e65a8a0/bin/uautomizer-verify-aQ6SnzHsRB/config/svcomp-Reach-32bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c49d284e-bc07-42e7-90ac-bbc98e65a8a0/bin/uautomizer-verify-aQ6SnzHsRB --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash bf0fb52bead8e180875472b49ad053a30663ea61c3025c1e008ec598b0fa4db0 --- Real Ultimate output --- This is Ultimate 0.3.0-dev-d790fec [2024-11-27 20:22:33,181 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-27 20:22:33,331 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c49d284e-bc07-42e7-90ac-bbc98e65a8a0/bin/uautomizer-verify-aQ6SnzHsRB/config/svcomp-Reach-32bit-Automizer_Bitvector.epf [2024-11-27 20:22:33,338 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-27 20:22:33,339 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-27 20:22:33,368 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-27 20:22:33,369 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-27 20:22:33,369 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-27 20:22:33,370 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-27 20:22:33,370 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-27 20:22:33,370 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-27 20:22:33,370 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-27 20:22:33,371 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-27 20:22:33,371 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-27 20:22:33,371 INFO L153 SettingsManager]: * Use SBE=true [2024-11-27 20:22:33,371 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-27 20:22:33,372 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-27 20:22:33,372 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-27 20:22:33,372 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-27 20:22:33,372 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-27 20:22:33,372 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-27 20:22:33,373 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-27 20:22:33,373 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-27 20:22:33,373 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-11-27 20:22:33,373 INFO L153 SettingsManager]: * Use bitvectors instead of ints=true [2024-11-27 20:22:33,373 INFO L153 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2024-11-27 20:22:33,373 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-27 20:22:33,374 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-27 20:22:33,374 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2024-11-27 20:22:33,374 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-27 20:22:33,374 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2024-11-27 20:22:33,374 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-27 20:22:33,374 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-27 20:22:33,375 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-27 20:22:33,375 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-27 20:22:33,375 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-27 20:22:33,375 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-27 20:22:33,375 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-27 20:22:33,375 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-27 20:22:33,375 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-27 20:22:33,376 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-27 20:22:33,376 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-27 20:22:33,376 INFO L153 SettingsManager]: * Compute procedure contracts=false [2024-11-27 20:22:33,376 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-27 20:22:33,376 INFO L153 SettingsManager]: * Trace refinement strategy=FOX [2024-11-27 20:22:33,376 INFO L153 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2024-11-27 20:22:33,376 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-27 20:22:33,377 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-27 20:22:33,377 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-27 20:22:33,377 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-27 20:22:33,377 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_c49d284e-bc07-42e7-90ac-bbc98e65a8a0/bin/uautomizer-verify-aQ6SnzHsRB Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> bf0fb52bead8e180875472b49ad053a30663ea61c3025c1e008ec598b0fa4db0 [2024-11-27 20:22:33,786 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-27 20:22:33,800 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-27 20:22:33,803 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-27 20:22:33,805 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-27 20:22:33,805 INFO L274 PluginConnector]: CDTParser initialized [2024-11-27 20:22:33,807 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c49d284e-bc07-42e7-90ac-bbc98e65a8a0/bin/uautomizer-verify-aQ6SnzHsRB/../../sv-benchmarks/c/combinations/square_7+soft_float_3a.c.cil.c [2024-11-27 20:22:37,066 INFO L533 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c49d284e-bc07-42e7-90ac-bbc98e65a8a0/bin/uautomizer-verify-aQ6SnzHsRB/data/a60f58794/0ba84b872dbe43328910ad6b07210b45/FLAG7068eb9f7 [2024-11-27 20:22:37,358 INFO L384 CDTParser]: Found 1 translation units. [2024-11-27 20:22:37,359 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c49d284e-bc07-42e7-90ac-bbc98e65a8a0/sv-benchmarks/c/combinations/square_7+soft_float_3a.c.cil.c [2024-11-27 20:22:37,369 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c49d284e-bc07-42e7-90ac-bbc98e65a8a0/bin/uautomizer-verify-aQ6SnzHsRB/data/a60f58794/0ba84b872dbe43328910ad6b07210b45/FLAG7068eb9f7 [2024-11-27 20:22:37,386 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c49d284e-bc07-42e7-90ac-bbc98e65a8a0/bin/uautomizer-verify-aQ6SnzHsRB/data/a60f58794/0ba84b872dbe43328910ad6b07210b45 [2024-11-27 20:22:37,389 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-27 20:22:37,391 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-27 20:22:37,393 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-27 20:22:37,393 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-27 20:22:37,399 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-27 20:22:37,400 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.11 08:22:37" (1/1) ... [2024-11-27 20:22:37,401 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4d1837f3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 08:22:37, skipping insertion in model container [2024-11-27 20:22:37,401 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.11 08:22:37" (1/1) ... [2024-11-27 20:22:37,430 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-27 20:22:37,659 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_c49d284e-bc07-42e7-90ac-bbc98e65a8a0/sv-benchmarks/c/combinations/square_7+soft_float_3a.c.cil.c[1995,2008] [2024-11-27 20:22:37,669 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_c49d284e-bc07-42e7-90ac-bbc98e65a8a0/sv-benchmarks/c/combinations/square_7+soft_float_3a.c.cil.c[2364,2377] [2024-11-27 20:22:37,740 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-27 20:22:37,756 INFO L200 MainTranslator]: Completed pre-run [2024-11-27 20:22:37,780 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_c49d284e-bc07-42e7-90ac-bbc98e65a8a0/sv-benchmarks/c/combinations/square_7+soft_float_3a.c.cil.c[1995,2008] [2024-11-27 20:22:37,786 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_c49d284e-bc07-42e7-90ac-bbc98e65a8a0/sv-benchmarks/c/combinations/square_7+soft_float_3a.c.cil.c[2364,2377] [2024-11-27 20:22:37,842 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-27 20:22:37,866 INFO L204 MainTranslator]: Completed translation [2024-11-27 20:22:37,868 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 08:22:37 WrapperNode [2024-11-27 20:22:37,868 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-27 20:22:37,870 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-27 20:22:37,870 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-27 20:22:37,870 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-27 20:22:37,885 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 08:22:37" (1/1) ... [2024-11-27 20:22:37,907 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 08:22:37" (1/1) ... [2024-11-27 20:22:37,954 INFO L138 Inliner]: procedures = 28, calls = 17, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 132 [2024-11-27 20:22:37,958 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-27 20:22:37,959 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-27 20:22:37,959 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-27 20:22:37,960 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-27 20:22:37,971 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 08:22:37" (1/1) ... [2024-11-27 20:22:37,972 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 08:22:37" (1/1) ... [2024-11-27 20:22:37,981 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 08:22:37" (1/1) ... [2024-11-27 20:22:38,009 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]. [2024-11-27 20:22:38,010 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 08:22:37" (1/1) ... [2024-11-27 20:22:38,013 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 08:22:37" (1/1) ... [2024-11-27 20:22:38,027 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 08:22:37" (1/1) ... [2024-11-27 20:22:38,032 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 08:22:37" (1/1) ... [2024-11-27 20:22:38,041 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 08:22:37" (1/1) ... [2024-11-27 20:22:38,049 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 08:22:37" (1/1) ... [2024-11-27 20:22:38,051 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 08:22:37" (1/1) ... [2024-11-27 20:22:38,059 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-27 20:22:38,060 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-27 20:22:38,060 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-27 20:22:38,060 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-27 20:22:38,066 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 08:22:37" (1/1) ... [2024-11-27 20:22:38,080 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-27 20:22:38,098 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c49d284e-bc07-42e7-90ac-bbc98e65a8a0/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 20:22:38,119 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c49d284e-bc07-42e7-90ac-bbc98e65a8a0/bin/uautomizer-verify-aQ6SnzHsRB/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-11-27 20:22:38,128 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c49d284e-bc07-42e7-90ac-bbc98e65a8a0/bin/uautomizer-verify-aQ6SnzHsRB/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-11-27 20:22:38,164 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-27 20:22:38,164 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1#0 [2024-11-27 20:22:38,164 INFO L130 BoogieDeclarations]: Found specification of procedure base2flt [2024-11-27 20:22:38,164 INFO L138 BoogieDeclarations]: Found implementation of procedure base2flt [2024-11-27 20:22:38,164 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-27 20:22:38,164 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-27 20:22:38,164 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2024-11-27 20:22:38,165 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2024-11-27 20:22:38,294 INFO L234 CfgBuilder]: Building ICFG [2024-11-27 20:22:38,297 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-27 20:22:43,012 INFO L? ?]: Removed 58 outVars from TransFormulas that were not future-live. [2024-11-27 20:22:43,012 INFO L283 CfgBuilder]: Performing block encoding [2024-11-27 20:22:43,025 INFO L307 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-27 20:22:43,025 INFO L312 CfgBuilder]: Removed 4 assume(true) statements. [2024-11-27 20:22:43,026 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.11 08:22:43 BoogieIcfgContainer [2024-11-27 20:22:43,026 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-27 20:22:43,028 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-27 20:22:43,029 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-27 20:22:43,034 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-27 20:22:43,034 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.11 08:22:37" (1/3) ... [2024-11-27 20:22:43,035 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1417417d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.11 08:22:43, skipping insertion in model container [2024-11-27 20:22:43,035 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 08:22:37" (2/3) ... [2024-11-27 20:22:43,035 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1417417d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.11 08:22:43, skipping insertion in model container [2024-11-27 20:22:43,035 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.11 08:22:43" (3/3) ... [2024-11-27 20:22:43,037 INFO L128 eAbstractionObserver]: Analyzing ICFG square_7+soft_float_3a.c.cil.c [2024-11-27 20:22:43,052 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-27 20:22:43,054 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG square_7+soft_float_3a.c.cil.c that has 3 procedures, 58 locations, 1 initial locations, 2 loop locations, and 2 error locations. [2024-11-27 20:22:43,114 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-27 20:22:43,135 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;@4ba2e254, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-27 20:22:43,135 INFO L334 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2024-11-27 20:22:43,142 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) [2024-11-27 20:22:43,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2024-11-27 20:22:43,148 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 20:22:43,149 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-11-27 20:22:43,149 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-27 20:22:43,154 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 20:22:43,154 INFO L85 PathProgramCache]: Analyzing trace with hash 78502818, now seen corresponding path program 1 times [2024-11-27 20:22:43,165 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-27 20:22:43,166 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [454274145] [2024-11-27 20:22:43,166 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 20:22:43,167 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 [2024-11-27 20:22:43,167 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c49d284e-bc07-42e7-90ac-bbc98e65a8a0/bin/uautomizer-verify-aQ6SnzHsRB/mathsat [2024-11-27 20:22:43,170 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c49d284e-bc07-42e7-90ac-bbc98e65a8a0/bin/uautomizer-verify-aQ6SnzHsRB/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2024-11-27 20:22:43,174 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c49d284e-bc07-42e7-90ac-bbc98e65a8a0/bin/uautomizer-verify-aQ6SnzHsRB/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2024-11-27 20:22:43,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 20:22:43,888 INFO L256 TraceCheckSpWp]: Trace formula consists of 20 conjuncts, 1 conjuncts are in the unsatisfiable core [2024-11-27 20:22:43,891 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 20:22:43,911 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-27 20:22:43,911 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-27 20:22:43,912 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-27 20:22:43,912 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [454274145] [2024-11-27 20:22:43,913 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [454274145] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-27 20:22:43,913 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-27 20:22:43,914 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-27 20:22:43,915 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1361111735] [2024-11-27 20:22:43,916 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-27 20:22:43,921 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-11-27 20:22:43,921 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-27 20:22:43,945 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-11-27 20:22:43,946 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-11-27 20:22:43,949 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) [2024-11-27 20:22:43,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 20:22:43,990 INFO L93 Difference]: Finished difference Result 111 states and 169 transitions. [2024-11-27 20:22:43,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-11-27 20:22:43,993 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 [2024-11-27 20:22:43,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 20:22:44,002 INFO L225 Difference]: With dead ends: 111 [2024-11-27 20:22:44,002 INFO L226 Difference]: Without dead ends: 49 [2024-11-27 20:22:44,006 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 [2024-11-27 20:22:44,013 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 [2024-11-27 20:22:44,014 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] [2024-11-27 20:22:44,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2024-11-27 20:22:44,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2024-11-27 20:22:44,058 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) [2024-11-27 20:22:44,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 68 transitions. [2024-11-27 20:22:44,067 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 68 transitions. Word has length 7 [2024-11-27 20:22:44,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-27 20:22:44,069 INFO L471 AbstractCegarLoop]: Abstraction has 49 states and 68 transitions. [2024-11-27 20:22:44,070 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) [2024-11-27 20:22:44,070 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 68 transitions. [2024-11-27 20:22:44,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2024-11-27 20:22:44,072 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 20:22:44,072 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-11-27 20:22:44,087 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c49d284e-bc07-42e7-90ac-bbc98e65a8a0/bin/uautomizer-verify-aQ6SnzHsRB/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Ended with exit code 0 [2024-11-27 20:22:44,272 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c49d284e-bc07-42e7-90ac-bbc98e65a8a0/bin/uautomizer-verify-aQ6SnzHsRB/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-11-27 20:22:44,273 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-27 20:22:44,275 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 20:22:44,275 INFO L85 PathProgramCache]: Analyzing trace with hash 78562400, now seen corresponding path program 1 times [2024-11-27 20:22:44,276 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-27 20:22:44,276 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [57928531] [2024-11-27 20:22:44,276 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 20:22:44,277 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 [2024-11-27 20:22:44,277 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c49d284e-bc07-42e7-90ac-bbc98e65a8a0/bin/uautomizer-verify-aQ6SnzHsRB/mathsat [2024-11-27 20:22:44,279 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c49d284e-bc07-42e7-90ac-bbc98e65a8a0/bin/uautomizer-verify-aQ6SnzHsRB/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2024-11-27 20:22:44,283 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c49d284e-bc07-42e7-90ac-bbc98e65a8a0/bin/uautomizer-verify-aQ6SnzHsRB/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2024-11-27 20:30:54,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 20:30:55,098 INFO L256 TraceCheckSpWp]: Trace formula consists of 20 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-11-27 20:30:55,117 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 20:31:03,877 WARN L286 SmtUtils]: Spent 8.22s on a formula simplification that was a NOOP. DAG size: 3 (called from [L 728] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2024-11-27 20:31:12,006 WARN L286 SmtUtils]: Spent 8.13s 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) [2024-11-27 20:31:20,233 WARN L286 SmtUtils]: Spent 8.23s 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) [2024-11-27 20:31:24,323 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 [2024-11-27 20:31:40,714 WARN L286 SmtUtils]: Spent 8.25s on a formula simplification that was a NOOP. DAG size: 3 (called from [L 728] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2024-11-27 20:31:48,951 WARN L286 SmtUtils]: Spent 8.24s 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) [2024-11-27 20:31:57,076 WARN L286 SmtUtils]: Spent 8.12s 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) [2024-11-27 20:32:09,364 WARN L286 SmtUtils]: Spent 8.23s 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) [2024-11-27 20:32:17,595 WARN L286 SmtUtils]: Spent 8.23s 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) [2024-11-27 20:32:25,717 WARN L286 SmtUtils]: Spent 8.12s on a formula simplification that was a NOOP. DAG size: 29 (called from [L 728] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2024-11-27 20:32:29,826 WARN L851 $PredicateComparison]: unable to prove that (let ((.cse0 ((_ to_fp 8 24) roundNearestTiesToEven 1.0)) (.cse1 ((_ to_fp 8 24) roundNearestTiesToEven (/ 1.0 2.0))) (.cse2 ((_ to_fp 8 24) roundNearestTiesToEven (/ 1.0 8.0))) (.cse3 ((_ to_fp 8 24) roundNearestTiesToEven (/ 1.0 16.0))) (.cse4 ((_ to_fp 8 24) roundNearestTiesToEven (/ 5.0 128.0)))) (or (exists ((|v_ULTIMATE.start_main1_~IN~0#1_5| (_ FloatingPoint 8 24))) (and (fp.geq |v_ULTIMATE.start_main1_~IN~0#1_5| (_ +zero 8 24)) (fp.lt |v_ULTIMATE.start_main1_~IN~0#1_5| .cse0) (not (fp.lt (fp.sub roundNearestTiesToEven (fp.add roundNearestTiesToEven (fp.sub roundNearestTiesToEven (fp.add roundNearestTiesToEven .cse0 (fp.mul roundNearestTiesToEven .cse1 |v_ULTIMATE.start_main1_~IN~0#1_5|)) (fp.mul roundNearestTiesToEven (fp.mul roundNearestTiesToEven .cse2 |v_ULTIMATE.start_main1_~IN~0#1_5|) |v_ULTIMATE.start_main1_~IN~0#1_5|)) (fp.mul roundNearestTiesToEven (fp.mul roundNearestTiesToEven (fp.mul roundNearestTiesToEven .cse3 |v_ULTIMATE.start_main1_~IN~0#1_5|) |v_ULTIMATE.start_main1_~IN~0#1_5|) |v_ULTIMATE.start_main1_~IN~0#1_5|)) (fp.mul roundNearestTiesToEven (fp.mul roundNearestTiesToEven (fp.mul roundNearestTiesToEven (fp.mul roundNearestTiesToEven .cse4 |v_ULTIMATE.start_main1_~IN~0#1_5|) |v_ULTIMATE.start_main1_~IN~0#1_5|) |v_ULTIMATE.start_main1_~IN~0#1_5|) |v_ULTIMATE.start_main1_~IN~0#1_5|)) ((_ to_fp 8 24) roundNearestTiesToEven (/ 7.0 5.0)))))) (exists ((|v_ULTIMATE.start_main1_~IN~0#1_5| (_ FloatingPoint 8 24))) (and (fp.geq |v_ULTIMATE.start_main1_~IN~0#1_5| (_ +zero 8 24)) (fp.lt |v_ULTIMATE.start_main1_~IN~0#1_5| .cse0) (not (fp.geq (fp.sub roundNearestTiesToEven (fp.add roundNearestTiesToEven (fp.sub roundNearestTiesToEven (fp.add roundNearestTiesToEven .cse0 (fp.mul roundNearestTiesToEven .cse1 |v_ULTIMATE.start_main1_~IN~0#1_5|)) (fp.mul roundNearestTiesToEven (fp.mul roundNearestTiesToEven .cse2 |v_ULTIMATE.start_main1_~IN~0#1_5|) |v_ULTIMATE.start_main1_~IN~0#1_5|)) (fp.mul roundNearestTiesToEven (fp.mul roundNearestTiesToEven (fp.mul roundNearestTiesToEven .cse3 |v_ULTIMATE.start_main1_~IN~0#1_5|) |v_ULTIMATE.start_main1_~IN~0#1_5|) |v_ULTIMATE.start_main1_~IN~0#1_5|)) (fp.mul roundNearestTiesToEven (fp.mul roundNearestTiesToEven (fp.mul roundNearestTiesToEven (fp.mul roundNearestTiesToEven .cse4 |v_ULTIMATE.start_main1_~IN~0#1_5|) |v_ULTIMATE.start_main1_~IN~0#1_5|) |v_ULTIMATE.start_main1_~IN~0#1_5|) |v_ULTIMATE.start_main1_~IN~0#1_5|)) (_ +zero 8 24))))))) is different from false [2024-11-27 20:32:33,878 WARN L873 $PredicateComparison]: unable to prove that (let ((.cse0 ((_ to_fp 8 24) roundNearestTiesToEven 1.0)) (.cse1 ((_ to_fp 8 24) roundNearestTiesToEven (/ 1.0 2.0))) (.cse2 ((_ to_fp 8 24) roundNearestTiesToEven (/ 1.0 8.0))) (.cse3 ((_ to_fp 8 24) roundNearestTiesToEven (/ 1.0 16.0))) (.cse4 ((_ to_fp 8 24) roundNearestTiesToEven (/ 5.0 128.0)))) (or (exists ((|v_ULTIMATE.start_main1_~IN~0#1_5| (_ FloatingPoint 8 24))) (and (fp.geq |v_ULTIMATE.start_main1_~IN~0#1_5| (_ +zero 8 24)) (fp.lt |v_ULTIMATE.start_main1_~IN~0#1_5| .cse0) (not (fp.lt (fp.sub roundNearestTiesToEven (fp.add roundNearestTiesToEven (fp.sub roundNearestTiesToEven (fp.add roundNearestTiesToEven .cse0 (fp.mul roundNearestTiesToEven .cse1 |v_ULTIMATE.start_main1_~IN~0#1_5|)) (fp.mul roundNearestTiesToEven (fp.mul roundNearestTiesToEven .cse2 |v_ULTIMATE.start_main1_~IN~0#1_5|) |v_ULTIMATE.start_main1_~IN~0#1_5|)) (fp.mul roundNearestTiesToEven (fp.mul roundNearestTiesToEven (fp.mul roundNearestTiesToEven .cse3 |v_ULTIMATE.start_main1_~IN~0#1_5|) |v_ULTIMATE.start_main1_~IN~0#1_5|) |v_ULTIMATE.start_main1_~IN~0#1_5|)) (fp.mul roundNearestTiesToEven (fp.mul roundNearestTiesToEven (fp.mul roundNearestTiesToEven (fp.mul roundNearestTiesToEven .cse4 |v_ULTIMATE.start_main1_~IN~0#1_5|) |v_ULTIMATE.start_main1_~IN~0#1_5|) |v_ULTIMATE.start_main1_~IN~0#1_5|) |v_ULTIMATE.start_main1_~IN~0#1_5|)) ((_ to_fp 8 24) roundNearestTiesToEven (/ 7.0 5.0)))))) (exists ((|v_ULTIMATE.start_main1_~IN~0#1_5| (_ FloatingPoint 8 24))) (and (fp.geq |v_ULTIMATE.start_main1_~IN~0#1_5| (_ +zero 8 24)) (fp.lt |v_ULTIMATE.start_main1_~IN~0#1_5| .cse0) (not (fp.geq (fp.sub roundNearestTiesToEven (fp.add roundNearestTiesToEven (fp.sub roundNearestTiesToEven (fp.add roundNearestTiesToEven .cse0 (fp.mul roundNearestTiesToEven .cse1 |v_ULTIMATE.start_main1_~IN~0#1_5|)) (fp.mul roundNearestTiesToEven (fp.mul roundNearestTiesToEven .cse2 |v_ULTIMATE.start_main1_~IN~0#1_5|) |v_ULTIMATE.start_main1_~IN~0#1_5|)) (fp.mul roundNearestTiesToEven (fp.mul roundNearestTiesToEven (fp.mul roundNearestTiesToEven .cse3 |v_ULTIMATE.start_main1_~IN~0#1_5|) |v_ULTIMATE.start_main1_~IN~0#1_5|) |v_ULTIMATE.start_main1_~IN~0#1_5|)) (fp.mul roundNearestTiesToEven (fp.mul roundNearestTiesToEven (fp.mul roundNearestTiesToEven (fp.mul roundNearestTiesToEven .cse4 |v_ULTIMATE.start_main1_~IN~0#1_5|) |v_ULTIMATE.start_main1_~IN~0#1_5|) |v_ULTIMATE.start_main1_~IN~0#1_5|) |v_ULTIMATE.start_main1_~IN~0#1_5|)) (_ +zero 8 24))))))) is different from true [2024-11-27 20:32:33,879 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-27 20:32:33,879 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-27 20:32:33,879 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-27 20:32:33,879 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [57928531] [2024-11-27 20:32:33,879 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [57928531] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-27 20:32:33,879 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-27 20:32:33,879 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-27 20:32:33,880 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [27159745] [2024-11-27 20:32:33,880 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-27 20:32:33,881 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-27 20:32:33,881 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-27 20:32:33,882 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-27 20:32:33,882 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=12, Unknown=3, NotChecked=14, Total=42 [2024-11-27 20:32:33,883 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) [2024-11-27 20:32:38,207 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.20s for a HTC check with result UNKNOWN. Formula has sorts [Bool, FloatingPoint, RoundingMode, Real], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-11-27 20:32:42,215 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, FloatingPoint, RoundingMode, Real, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-11-27 20:32:46,220 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, FloatingPoint, RoundingMode, Real], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-11-27 20:32:46,535 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 20:32:46,535 INFO L93 Difference]: Finished difference Result 49 states and 68 transitions. [2024-11-27 20:32:46,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-27 20:32:46,537 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 [2024-11-27 20:32:46,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 20:32:46,538 INFO L225 Difference]: With dead ends: 49 [2024-11-27 20:32:46,538 INFO L226 Difference]: Without dead ends: 44 [2024-11-27 20:32:46,538 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 [2024-11-27 20:32:46,539 INFO L435 NwaCegarLoop]: 63 mSDtfsCounter, 62 mSDsluCounter, 106 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 0 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 12.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 169 SdHoareTripleChecker+Invalid, 163 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 136 IncrementalHoareTripleChecker+Unchecked, 12.6s IncrementalHoareTripleChecker+Time [2024-11-27 20:32:46,539 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [62 Valid, 169 Invalid, 163 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 24 Invalid, 3 Unknown, 136 Unchecked, 12.6s Time] [2024-11-27 20:32:46,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2024-11-27 20:32:46,546 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2024-11-27 20:32:46,546 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) [2024-11-27 20:32:46,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 63 transitions. [2024-11-27 20:32:46,548 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 63 transitions. Word has length 7 [2024-11-27 20:32:46,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-27 20:32:46,549 INFO L471 AbstractCegarLoop]: Abstraction has 44 states and 63 transitions. [2024-11-27 20:32:46,549 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) [2024-11-27 20:32:46,549 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 63 transitions. [2024-11-27 20:32:46,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2024-11-27 20:32:46,551 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 20:32:46,551 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] [2024-11-27 20:32:46,612 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c49d284e-bc07-42e7-90ac-bbc98e65a8a0/bin/uautomizer-verify-aQ6SnzHsRB/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2024-11-27 20:32:46,751 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c49d284e-bc07-42e7-90ac-bbc98e65a8a0/bin/uautomizer-verify-aQ6SnzHsRB/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-11-27 20:32:46,752 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-27 20:32:46,752 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 20:32:46,752 INFO L85 PathProgramCache]: Analyzing trace with hash -1680982752, now seen corresponding path program 1 times [2024-11-27 20:32:46,753 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-27 20:32:46,753 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2132489849] [2024-11-27 20:32:46,753 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 20:32:46,753 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 20:32:46,753 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c49d284e-bc07-42e7-90ac-bbc98e65a8a0/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 20:32:46,755 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c49d284e-bc07-42e7-90ac-bbc98e65a8a0/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 20:32:46,757 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c49d284e-bc07-42e7-90ac-bbc98e65a8a0/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-27 20:32:46,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 20:32:46,835 INFO L256 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-11-27 20:32:46,839 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 20:32:47,091 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-27 20:32:47,091 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-27 20:32:47,094 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-27 20:32:47,094 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2132489849] [2024-11-27 20:32:47,094 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2132489849] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-27 20:32:47,094 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-27 20:32:47,094 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-27 20:32:47,095 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [256702817] [2024-11-27 20:32:47,095 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-27 20:32:47,095 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-27 20:32:47,095 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-27 20:32:47,096 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-27 20:32:47,098 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-27 20:32:47,098 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) [2024-11-27 20:32:47,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 20:32:47,828 INFO L93 Difference]: Finished difference Result 96 states and 142 transitions. [2024-11-27 20:32:47,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-27 20:32:47,829 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 [2024-11-27 20:32:47,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 20:32:47,832 INFO L225 Difference]: With dead ends: 96 [2024-11-27 20:32:47,832 INFO L226 Difference]: Without dead ends: 56 [2024-11-27 20:32:47,833 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 [2024-11-27 20:32:47,834 INFO L435 NwaCegarLoop]: 51 mSDtfsCounter, 10 mSDsluCounter, 88 mSDsCounter, 0 mSdLazyCounter, 52 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 139 SdHoareTripleChecker+Invalid, 54 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 52 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-11-27 20:32:47,834 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] [2024-11-27 20:32:47,836 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2024-11-27 20:32:47,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 49. [2024-11-27 20:32:47,847 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) [2024-11-27 20:32:47,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 69 transitions. [2024-11-27 20:32:47,849 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 69 transitions. Word has length 42 [2024-11-27 20:32:47,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-27 20:32:47,850 INFO L471 AbstractCegarLoop]: Abstraction has 49 states and 69 transitions. [2024-11-27 20:32:47,850 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) [2024-11-27 20:32:47,850 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 69 transitions. [2024-11-27 20:32:47,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2024-11-27 20:32:47,852 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 20:32:47,852 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] [2024-11-27 20:32:47,864 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c49d284e-bc07-42e7-90ac-bbc98e65a8a0/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-11-27 20:32:48,053 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c49d284e-bc07-42e7-90ac-bbc98e65a8a0/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 20:32:48,053 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-27 20:32:48,053 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 20:32:48,054 INFO L85 PathProgramCache]: Analyzing trace with hash -962375373, now seen corresponding path program 1 times [2024-11-27 20:32:48,054 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-27 20:32:48,054 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1398849965] [2024-11-27 20:32:48,054 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 20:32:48,054 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 20:32:48,054 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c49d284e-bc07-42e7-90ac-bbc98e65a8a0/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 20:32:48,058 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c49d284e-bc07-42e7-90ac-bbc98e65a8a0/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 20:32:48,059 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c49d284e-bc07-42e7-90ac-bbc98e65a8a0/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-27 20:32:48,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 20:32:48,142 INFO L256 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-11-27 20:32:48,144 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 20:32:48,215 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-11-27 20:32:48,215 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-27 20:32:48,215 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-27 20:32:48,216 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1398849965] [2024-11-27 20:32:48,216 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1398849965] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-27 20:32:48,216 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-27 20:32:48,216 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-27 20:32:48,216 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2016768120] [2024-11-27 20:32:48,216 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-27 20:32:48,216 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-27 20:32:48,217 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-27 20:32:48,217 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-27 20:32:48,217 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-27 20:32:48,218 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) [2024-11-27 20:32:48,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 20:32:48,263 INFO L93 Difference]: Finished difference Result 58 states and 79 transitions. [2024-11-27 20:32:48,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-27 20:32:48,264 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 [2024-11-27 20:32:48,264 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 20:32:48,266 INFO L225 Difference]: With dead ends: 58 [2024-11-27 20:32:48,266 INFO L226 Difference]: Without dead ends: 49 [2024-11-27 20:32:48,267 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-27 20:32:48,268 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 [2024-11-27 20:32:48,268 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] [2024-11-27 20:32:48,269 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2024-11-27 20:32:48,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2024-11-27 20:32:48,277 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) [2024-11-27 20:32:48,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 68 transitions. [2024-11-27 20:32:48,278 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 68 transitions. Word has length 44 [2024-11-27 20:32:48,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-27 20:32:48,279 INFO L471 AbstractCegarLoop]: Abstraction has 49 states and 68 transitions. [2024-11-27 20:32:48,279 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) [2024-11-27 20:32:48,279 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 68 transitions. [2024-11-27 20:32:48,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2024-11-27 20:32:48,280 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 20:32:48,280 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] [2024-11-27 20:32:48,288 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c49d284e-bc07-42e7-90ac-bbc98e65a8a0/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-11-27 20:32:48,481 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c49d284e-bc07-42e7-90ac-bbc98e65a8a0/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 20:32:48,481 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-27 20:32:48,482 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 20:32:48,482 INFO L85 PathProgramCache]: Analyzing trace with hash -1484194953, now seen corresponding path program 1 times [2024-11-27 20:32:48,482 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-27 20:32:48,482 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [722939406] [2024-11-27 20:32:48,482 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 20:32:48,482 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 20:32:48,482 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c49d284e-bc07-42e7-90ac-bbc98e65a8a0/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 20:32:48,484 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c49d284e-bc07-42e7-90ac-bbc98e65a8a0/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 20:32:48,485 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c49d284e-bc07-42e7-90ac-bbc98e65a8a0/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-27 20:32:48,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 20:32:48,577 INFO L256 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-11-27 20:32:48,580 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 20:32:48,866 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-27 20:32:48,866 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-27 20:32:48,867 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-27 20:32:48,867 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [722939406] [2024-11-27 20:32:48,867 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [722939406] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-27 20:32:48,867 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-27 20:32:48,867 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-27 20:32:48,867 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [334263371] [2024-11-27 20:32:48,868 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-27 20:32:48,868 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-27 20:32:48,868 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-27 20:32:48,869 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-27 20:32:48,869 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-27 20:32:48,869 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) [2024-11-27 20:32:49,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 20:32:49,308 INFO L93 Difference]: Finished difference Result 97 states and 138 transitions. [2024-11-27 20:32:49,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-27 20:32:49,309 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 [2024-11-27 20:32:49,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 20:32:49,310 INFO L225 Difference]: With dead ends: 97 [2024-11-27 20:32:49,310 INFO L226 Difference]: Without dead ends: 56 [2024-11-27 20:32:49,310 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 [2024-11-27 20:32:49,311 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 [2024-11-27 20:32:49,312 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] [2024-11-27 20:32:49,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2024-11-27 20:32:49,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 53. [2024-11-27 20:32:49,321 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) [2024-11-27 20:32:49,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 74 transitions. [2024-11-27 20:32:49,323 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 74 transitions. Word has length 46 [2024-11-27 20:32:49,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-27 20:32:49,323 INFO L471 AbstractCegarLoop]: Abstraction has 53 states and 74 transitions. [2024-11-27 20:32:49,323 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) [2024-11-27 20:32:49,323 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 74 transitions. [2024-11-27 20:32:49,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2024-11-27 20:32:49,325 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 20:32:49,351 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] [2024-11-27 20:32:49,365 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c49d284e-bc07-42e7-90ac-bbc98e65a8a0/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-11-27 20:32:49,552 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c49d284e-bc07-42e7-90ac-bbc98e65a8a0/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 20:32:49,552 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-27 20:32:49,552 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 20:32:49,553 INFO L85 PathProgramCache]: Analyzing trace with hash 443440524, now seen corresponding path program 1 times [2024-11-27 20:32:49,553 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-27 20:32:49,553 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [817742795] [2024-11-27 20:32:49,553 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 20:32:49,553 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 20:32:49,553 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c49d284e-bc07-42e7-90ac-bbc98e65a8a0/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 20:32:49,557 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c49d284e-bc07-42e7-90ac-bbc98e65a8a0/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 20:32:49,558 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c49d284e-bc07-42e7-90ac-bbc98e65a8a0/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-27 20:32:49,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 20:32:49,638 INFO L256 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-11-27 20:32:49,641 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 20:32:51,363 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-11-27 20:32:51,364 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-27 20:32:53,418 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-11-27 20:32:53,418 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-27 20:32:53,418 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [817742795] [2024-11-27 20:32:53,418 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [817742795] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-27 20:32:53,418 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-27 20:32:53,419 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2024-11-27 20:32:53,419 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1842773679] [2024-11-27 20:32:53,419 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-27 20:32:53,419 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-11-27 20:32:53,419 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-27 20:32:53,420 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-11-27 20:32:53,421 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2024-11-27 20:32:53,421 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) [2024-11-27 20:32:54,456 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 20:32:54,457 INFO L93 Difference]: Finished difference Result 99 states and 151 transitions. [2024-11-27 20:32:54,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-27 20:32:54,458 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 [2024-11-27 20:32:54,458 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 20:32:54,459 INFO L225 Difference]: With dead ends: 99 [2024-11-27 20:32:54,459 INFO L226 Difference]: Without dead ends: 76 [2024-11-27 20:32:54,460 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 77 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2024-11-27 20:32:54,461 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 [2024-11-27 20:32:54,461 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] [2024-11-27 20:32:54,462 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2024-11-27 20:32:54,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 76. [2024-11-27 20:32:54,475 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) [2024-11-27 20:32:54,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 115 transitions. [2024-11-27 20:32:54,477 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 115 transitions. Word has length 47 [2024-11-27 20:32:54,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-27 20:32:54,477 INFO L471 AbstractCegarLoop]: Abstraction has 76 states and 115 transitions. [2024-11-27 20:32:54,478 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) [2024-11-27 20:32:54,478 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 115 transitions. [2024-11-27 20:32:54,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2024-11-27 20:32:54,480 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 20:32:54,480 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] [2024-11-27 20:32:54,490 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c49d284e-bc07-42e7-90ac-bbc98e65a8a0/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-11-27 20:32:54,680 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c49d284e-bc07-42e7-90ac-bbc98e65a8a0/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 20:32:54,681 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-27 20:32:54,681 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 20:32:54,681 INFO L85 PathProgramCache]: Analyzing trace with hash 1195332808, now seen corresponding path program 1 times [2024-11-27 20:32:54,681 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-27 20:32:54,681 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [960217990] [2024-11-27 20:32:54,681 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 20:32:54,682 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 20:32:54,682 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c49d284e-bc07-42e7-90ac-bbc98e65a8a0/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 20:32:54,684 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c49d284e-bc07-42e7-90ac-bbc98e65a8a0/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 20:32:54,685 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c49d284e-bc07-42e7-90ac-bbc98e65a8a0/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-27 20:32:54,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 20:32:54,777 INFO L256 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-11-27 20:32:54,783 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 20:32:55,527 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2024-11-27 20:32:55,528 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-27 20:32:56,185 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2024-11-27 20:32:56,186 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-27 20:32:56,186 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [960217990] [2024-11-27 20:32:56,186 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [960217990] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-27 20:32:56,186 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-27 20:32:56,186 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2024-11-27 20:32:56,187 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1721939082] [2024-11-27 20:32:56,187 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-27 20:32:56,187 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-27 20:32:56,187 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-27 20:32:56,188 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-27 20:32:56,188 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-27 20:32:56,189 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) [2024-11-27 20:32:56,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 20:32:56,641 INFO L93 Difference]: Finished difference Result 115 states and 177 transitions. [2024-11-27 20:32:56,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-27 20:32:56,642 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 [2024-11-27 20:32:56,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 20:32:56,644 INFO L225 Difference]: With dead ends: 115 [2024-11-27 20:32:56,645 INFO L226 Difference]: Without dead ends: 110 [2024-11-27 20:32:56,645 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-27 20:32:56,646 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 [2024-11-27 20:32:56,647 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] [2024-11-27 20:32:56,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2024-11-27 20:32:56,671 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 109. [2024-11-27 20:32:56,672 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) [2024-11-27 20:32:56,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 170 transitions. [2024-11-27 20:32:56,675 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 170 transitions. Word has length 47 [2024-11-27 20:32:56,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-27 20:32:56,675 INFO L471 AbstractCegarLoop]: Abstraction has 109 states and 170 transitions. [2024-11-27 20:32:56,675 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) [2024-11-27 20:32:56,676 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 170 transitions. [2024-11-27 20:32:56,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2024-11-27 20:32:56,678 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 20:32:56,678 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] [2024-11-27 20:32:56,692 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c49d284e-bc07-42e7-90ac-bbc98e65a8a0/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-11-27 20:32:56,882 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c49d284e-bc07-42e7-90ac-bbc98e65a8a0/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 20:32:56,883 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-27 20:32:56,883 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 20:32:56,884 INFO L85 PathProgramCache]: Analyzing trace with hash -1516766196, now seen corresponding path program 1 times [2024-11-27 20:32:56,884 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-27 20:32:56,884 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2077349656] [2024-11-27 20:32:56,884 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 20:32:56,884 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 20:32:56,884 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c49d284e-bc07-42e7-90ac-bbc98e65a8a0/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 20:32:56,886 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c49d284e-bc07-42e7-90ac-bbc98e65a8a0/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 20:32:56,887 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c49d284e-bc07-42e7-90ac-bbc98e65a8a0/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-27 20:32:56,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 20:32:56,953 INFO L256 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-27 20:32:56,956 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 20:32:57,793 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2024-11-27 20:32:57,793 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-27 20:32:58,510 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-11-27 20:32:58,510 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-27 20:32:58,510 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2077349656] [2024-11-27 20:32:58,511 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2077349656] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-27 20:32:58,511 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-27 20:32:58,511 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [8] total 10 [2024-11-27 20:32:58,511 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [434835149] [2024-11-27 20:32:58,511 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-27 20:32:58,512 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-27 20:32:58,512 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-27 20:32:58,513 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-27 20:32:58,513 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2024-11-27 20:32:58,513 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) [2024-11-27 20:32:58,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 20:32:58,860 INFO L93 Difference]: Finished difference Result 115 states and 175 transitions. [2024-11-27 20:32:58,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-27 20:32:58,861 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 [2024-11-27 20:32:58,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 20:32:58,863 INFO L225 Difference]: With dead ends: 115 [2024-11-27 20:32:58,863 INFO L226 Difference]: Without dead ends: 109 [2024-11-27 20:32:58,863 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2024-11-27 20:32:58,864 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 [2024-11-27 20:32:58,865 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] [2024-11-27 20:32:58,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2024-11-27 20:32:58,895 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 109. [2024-11-27 20:32:58,899 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) [2024-11-27 20:32:58,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 169 transitions. [2024-11-27 20:32:58,901 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 169 transitions. Word has length 49 [2024-11-27 20:32:58,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-27 20:32:58,901 INFO L471 AbstractCegarLoop]: Abstraction has 109 states and 169 transitions. [2024-11-27 20:32:58,902 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) [2024-11-27 20:32:58,902 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 169 transitions. [2024-11-27 20:32:58,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2024-11-27 20:32:58,904 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 20:32:58,904 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] [2024-11-27 20:32:58,920 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c49d284e-bc07-42e7-90ac-bbc98e65a8a0/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-11-27 20:32:59,108 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c49d284e-bc07-42e7-90ac-bbc98e65a8a0/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 20:32:59,109 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-27 20:32:59,109 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 20:32:59,109 INFO L85 PathProgramCache]: Analyzing trace with hash -1574024498, now seen corresponding path program 1 times [2024-11-27 20:32:59,110 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-27 20:32:59,110 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1137908314] [2024-11-27 20:32:59,110 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 20:32:59,110 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 20:32:59,110 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c49d284e-bc07-42e7-90ac-bbc98e65a8a0/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 20:32:59,112 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c49d284e-bc07-42e7-90ac-bbc98e65a8a0/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 20:32:59,114 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c49d284e-bc07-42e7-90ac-bbc98e65a8a0/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-11-27 20:32:59,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 20:32:59,179 INFO L256 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-11-27 20:32:59,180 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 20:32:59,528 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-11-27 20:32:59,528 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-27 20:32:59,529 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-27 20:32:59,529 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1137908314] [2024-11-27 20:32:59,529 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1137908314] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-27 20:32:59,529 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-27 20:32:59,529 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-27 20:32:59,529 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [644641698] [2024-11-27 20:32:59,529 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-27 20:32:59,530 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-27 20:32:59,530 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-27 20:32:59,530 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-27 20:32:59,530 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-27 20:32:59,531 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) [2024-11-27 20:32:59,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 20:32:59,863 INFO L93 Difference]: Finished difference Result 138 states and 200 transitions. [2024-11-27 20:32:59,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-27 20:32:59,864 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 [2024-11-27 20:32:59,865 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 20:32:59,866 INFO L225 Difference]: With dead ends: 138 [2024-11-27 20:32:59,866 INFO L226 Difference]: Without dead ends: 120 [2024-11-27 20:32:59,866 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 [2024-11-27 20:32:59,867 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 [2024-11-27 20:32:59,867 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] [2024-11-27 20:32:59,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2024-11-27 20:32:59,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 120. [2024-11-27 20:32:59,878 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) [2024-11-27 20:32:59,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 177 transitions. [2024-11-27 20:32:59,880 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 177 transitions. Word has length 49 [2024-11-27 20:32:59,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-27 20:32:59,881 INFO L471 AbstractCegarLoop]: Abstraction has 120 states and 177 transitions. [2024-11-27 20:32:59,881 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) [2024-11-27 20:32:59,881 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 177 transitions. [2024-11-27 20:32:59,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2024-11-27 20:32:59,883 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 20:32:59,883 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] [2024-11-27 20:32:59,894 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c49d284e-bc07-42e7-90ac-bbc98e65a8a0/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2024-11-27 20:33:00,083 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c49d284e-bc07-42e7-90ac-bbc98e65a8a0/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 20:33:00,084 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-27 20:33:00,084 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 20:33:00,084 INFO L85 PathProgramCache]: Analyzing trace with hash -1835478928, now seen corresponding path program 1 times [2024-11-27 20:33:00,084 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-27 20:33:00,084 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [232906134] [2024-11-27 20:33:00,085 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 20:33:00,085 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 20:33:00,085 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c49d284e-bc07-42e7-90ac-bbc98e65a8a0/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 20:33:00,087 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c49d284e-bc07-42e7-90ac-bbc98e65a8a0/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 20:33:00,088 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c49d284e-bc07-42e7-90ac-bbc98e65a8a0/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-11-27 20:33:00,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 20:33:00,161 INFO L256 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-11-27 20:33:00,164 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 20:33:00,571 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2024-11-27 20:33:00,572 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-27 20:33:00,572 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-27 20:33:00,572 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [232906134] [2024-11-27 20:33:00,572 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [232906134] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-27 20:33:00,572 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-27 20:33:00,572 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-11-27 20:33:00,573 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1697977384] [2024-11-27 20:33:00,573 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-27 20:33:00,573 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-27 20:33:00,573 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-27 20:33:00,574 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-27 20:33:00,574 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-27 20:33:00,574 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) [2024-11-27 20:33:00,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 20:33:00,919 INFO L93 Difference]: Finished difference Result 168 states and 241 transitions. [2024-11-27 20:33:00,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-27 20:33:00,920 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 [2024-11-27 20:33:00,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 20:33:00,922 INFO L225 Difference]: With dead ends: 168 [2024-11-27 20:33:00,922 INFO L226 Difference]: Without dead ends: 123 [2024-11-27 20:33:00,922 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 [2024-11-27 20:33:00,923 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 [2024-11-27 20:33:00,923 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] [2024-11-27 20:33:00,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2024-11-27 20:33:00,934 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 123. [2024-11-27 20:33:00,934 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) [2024-11-27 20:33:00,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 177 transitions. [2024-11-27 20:33:00,936 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 177 transitions. Word has length 50 [2024-11-27 20:33:00,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-27 20:33:00,937 INFO L471 AbstractCegarLoop]: Abstraction has 123 states and 177 transitions. [2024-11-27 20:33:00,937 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) [2024-11-27 20:33:00,937 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 177 transitions. [2024-11-27 20:33:00,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2024-11-27 20:33:00,938 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 20:33:00,938 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] [2024-11-27 20:33:00,950 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c49d284e-bc07-42e7-90ac-bbc98e65a8a0/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2024-11-27 20:33:01,142 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c49d284e-bc07-42e7-90ac-bbc98e65a8a0/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 20:33:01,143 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-27 20:33:01,143 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 20:33:01,143 INFO L85 PathProgramCache]: Analyzing trace with hash 1862759882, now seen corresponding path program 1 times [2024-11-27 20:33:01,143 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-27 20:33:01,143 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [156707514] [2024-11-27 20:33:01,144 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 20:33:01,144 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 20:33:01,144 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c49d284e-bc07-42e7-90ac-bbc98e65a8a0/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 20:33:01,146 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c49d284e-bc07-42e7-90ac-bbc98e65a8a0/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 20:33:01,152 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c49d284e-bc07-42e7-90ac-bbc98e65a8a0/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-11-27 20:33:01,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 20:33:01,210 INFO L256 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 13 conjuncts are in the unsatisfiable core [2024-11-27 20:33:01,212 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 20:33:03,051 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 10 proven. 10 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-27 20:33:03,052 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-27 20:33:06,132 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 10 proven. 10 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-27 20:33:06,132 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-27 20:33:06,133 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [156707514] [2024-11-27 20:33:06,133 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [156707514] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-27 20:33:06,133 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-27 20:33:06,133 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2024-11-27 20:33:06,133 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [914328759] [2024-11-27 20:33:06,133 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-27 20:33:06,134 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-11-27 20:33:06,134 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-27 20:33:06,134 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-11-27 20:33:06,135 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2024-11-27 20:33:06,135 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) [2024-11-27 20:33:15,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 20:33:15,855 INFO L93 Difference]: Finished difference Result 236 states and 391 transitions. [2024-11-27 20:33:15,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2024-11-27 20:33:15,858 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 [2024-11-27 20:33:15,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 20:33:15,861 INFO L225 Difference]: With dead ends: 236 [2024-11-27 20:33:15,864 INFO L226 Difference]: Without dead ends: 215 [2024-11-27 20:33:15,865 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 [2024-11-27 20:33:15,866 INFO L435 NwaCegarLoop]: 66 mSDtfsCounter, 75 mSDsluCounter, 756 mSDsCounter, 0 mSdLazyCounter, 573 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.7s 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, 6.9s IncrementalHoareTripleChecker+Time [2024-11-27 20:33:15,866 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [83 Valid, 822 Invalid, 591 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 573 Invalid, 0 Unknown, 0 Unchecked, 6.9s Time] [2024-11-27 20:33:15,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 215 states. [2024-11-27 20:33:15,902 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 215 to 133. [2024-11-27 20:33:15,906 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) [2024-11-27 20:33:15,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 204 transitions. [2024-11-27 20:33:15,910 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 204 transitions. Word has length 50 [2024-11-27 20:33:15,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-27 20:33:15,912 INFO L471 AbstractCegarLoop]: Abstraction has 133 states and 204 transitions. [2024-11-27 20:33:15,913 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) [2024-11-27 20:33:15,913 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 204 transitions. [2024-11-27 20:33:15,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2024-11-27 20:33:15,915 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 20:33:15,915 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] [2024-11-27 20:33:15,927 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c49d284e-bc07-42e7-90ac-bbc98e65a8a0/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2024-11-27 20:33:16,116 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c49d284e-bc07-42e7-90ac-bbc98e65a8a0/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 20:33:16,116 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-27 20:33:16,116 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 20:33:16,117 INFO L85 PathProgramCache]: Analyzing trace with hash 110748472, now seen corresponding path program 1 times [2024-11-27 20:33:16,117 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-27 20:33:16,117 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [205394468] [2024-11-27 20:33:16,117 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 20:33:16,117 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 20:33:16,117 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c49d284e-bc07-42e7-90ac-bbc98e65a8a0/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 20:33:16,119 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c49d284e-bc07-42e7-90ac-bbc98e65a8a0/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 20:33:16,121 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c49d284e-bc07-42e7-90ac-bbc98e65a8a0/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-11-27 20:33:16,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 20:33:16,192 INFO L256 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-11-27 20:33:16,193 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 20:33:16,559 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 25 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-27 20:33:16,559 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-27 20:33:17,477 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 4 proven. 10 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2024-11-27 20:33:17,477 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-27 20:33:17,478 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [205394468] [2024-11-27 20:33:17,478 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [205394468] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-27 20:33:17,478 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-27 20:33:17,478 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2024-11-27 20:33:17,478 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2134437651] [2024-11-27 20:33:17,478 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-27 20:33:17,479 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-27 20:33:17,479 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-27 20:33:17,480 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-27 20:33:17,480 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2024-11-27 20:33:17,480 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) [2024-11-27 20:33:18,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 20:33:18,604 INFO L93 Difference]: Finished difference Result 272 states and 422 transitions. [2024-11-27 20:33:18,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-27 20:33:18,605 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 [2024-11-27 20:33:18,605 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 20:33:18,607 INFO L225 Difference]: With dead ends: 272 [2024-11-27 20:33:18,607 INFO L226 Difference]: Without dead ends: 151 [2024-11-27 20:33:18,609 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 [2024-11-27 20:33:18,611 INFO L435 NwaCegarLoop]: 57 mSDtfsCounter, 22 mSDsluCounter, 157 mSDsCounter, 0 mSdLazyCounter, 79 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 214 SdHoareTripleChecker+Invalid, 85 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 79 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2024-11-27 20:33:18,611 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] [2024-11-27 20:33:18,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2024-11-27 20:33:18,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 142. [2024-11-27 20:33:18,650 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) [2024-11-27 20:33:18,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 226 transitions. [2024-11-27 20:33:18,655 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 226 transitions. Word has length 51 [2024-11-27 20:33:18,655 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-27 20:33:18,656 INFO L471 AbstractCegarLoop]: Abstraction has 142 states and 226 transitions. [2024-11-27 20:33:18,656 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) [2024-11-27 20:33:18,656 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 226 transitions. [2024-11-27 20:33:18,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2024-11-27 20:33:18,659 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 20:33:18,659 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] [2024-11-27 20:33:18,671 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c49d284e-bc07-42e7-90ac-bbc98e65a8a0/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2024-11-27 20:33:18,860 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c49d284e-bc07-42e7-90ac-bbc98e65a8a0/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 20:33:18,860 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-27 20:33:18,861 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 20:33:18,861 INFO L85 PathProgramCache]: Analyzing trace with hash -113107662, now seen corresponding path program 1 times [2024-11-27 20:33:18,861 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-27 20:33:18,861 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [328678313] [2024-11-27 20:33:18,861 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 20:33:18,862 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 20:33:18,862 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c49d284e-bc07-42e7-90ac-bbc98e65a8a0/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 20:33:18,866 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c49d284e-bc07-42e7-90ac-bbc98e65a8a0/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 20:33:18,868 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c49d284e-bc07-42e7-90ac-bbc98e65a8a0/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-11-27 20:33:18,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 20:33:18,947 INFO L256 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 13 conjuncts are in the unsatisfiable core [2024-11-27 20:33:18,950 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 20:33:21,039 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 10 proven. 13 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-27 20:33:21,039 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-27 20:33:24,670 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 10 proven. 13 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-27 20:33:24,670 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-27 20:33:24,670 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [328678313] [2024-11-27 20:33:24,670 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [328678313] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-27 20:33:24,670 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-27 20:33:24,670 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 20 [2024-11-27 20:33:24,670 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [737245840] [2024-11-27 20:33:24,671 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-27 20:33:24,671 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-11-27 20:33:24,671 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-27 20:33:24,672 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-11-27 20:33:24,672 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=327, Unknown=0, NotChecked=0, Total=380 [2024-11-27 20:33:24,672 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) [2024-11-27 20:33:31,667 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 20:33:31,667 INFO L93 Difference]: Finished difference Result 258 states and 463 transitions. [2024-11-27 20:33:31,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2024-11-27 20:33:31,669 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 [2024-11-27 20:33:31,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 20:33:31,671 INFO L225 Difference]: With dead ends: 258 [2024-11-27 20:33:31,671 INFO L226 Difference]: Without dead ends: 237 [2024-11-27 20:33:31,672 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 84 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 5.4s TimeCoverageRelationStatistics Valid=104, Invalid=598, Unknown=0, NotChecked=0, Total=702 [2024-11-27 20:33:31,674 INFO L435 NwaCegarLoop]: 79 mSDtfsCounter, 68 mSDsluCounter, 793 mSDsCounter, 0 mSdLazyCounter, 438 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.2s 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, 5.3s IncrementalHoareTripleChecker+Time [2024-11-27 20:33:31,675 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [74 Valid, 872 Invalid, 467 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 438 Invalid, 0 Unknown, 0 Unchecked, 5.3s Time] [2024-11-27 20:33:31,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 237 states. [2024-11-27 20:33:31,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 237 to 147. [2024-11-27 20:33:31,696 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) [2024-11-27 20:33:31,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 236 transitions. [2024-11-27 20:33:31,698 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 236 transitions. Word has length 52 [2024-11-27 20:33:31,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-27 20:33:31,699 INFO L471 AbstractCegarLoop]: Abstraction has 147 states and 236 transitions. [2024-11-27 20:33:31,699 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) [2024-11-27 20:33:31,699 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 236 transitions. [2024-11-27 20:33:31,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2024-11-27 20:33:31,701 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 20:33:31,701 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] [2024-11-27 20:33:31,712 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c49d284e-bc07-42e7-90ac-bbc98e65a8a0/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2024-11-27 20:33:31,905 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c49d284e-bc07-42e7-90ac-bbc98e65a8a0/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 20:33:31,906 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-27 20:33:31,906 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 20:33:31,906 INFO L85 PathProgramCache]: Analyzing trace with hash 1389274316, now seen corresponding path program 1 times [2024-11-27 20:33:31,906 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-27 20:33:31,906 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [709715552] [2024-11-27 20:33:31,906 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 20:33:31,906 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 20:33:31,907 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c49d284e-bc07-42e7-90ac-bbc98e65a8a0/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 20:33:31,908 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c49d284e-bc07-42e7-90ac-bbc98e65a8a0/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 20:33:31,910 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c49d284e-bc07-42e7-90ac-bbc98e65a8a0/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-11-27 20:33:31,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 20:33:31,969 INFO L256 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 13 conjuncts are in the unsatisfiable core [2024-11-27 20:33:31,970 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 20:33:33,137 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 12 proven. 3 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2024-11-27 20:33:33,138 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-27 20:33:35,139 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 12 proven. 3 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2024-11-27 20:33:35,139 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-27 20:33:35,139 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [709715552] [2024-11-27 20:33:35,139 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [709715552] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-27 20:33:35,140 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-27 20:33:35,140 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2024-11-27 20:33:35,140 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1967982509] [2024-11-27 20:33:35,140 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-27 20:33:35,140 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-11-27 20:33:35,140 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-27 20:33:35,141 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-11-27 20:33:35,141 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=202, Unknown=0, NotChecked=0, Total=240 [2024-11-27 20:33:35,142 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) [2024-11-27 20:33:36,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 20:33:36,291 INFO L93 Difference]: Finished difference Result 184 states and 283 transitions. [2024-11-27 20:33:36,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-27 20:33:36,292 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 [2024-11-27 20:33:36,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 20:33:36,294 INFO L225 Difference]: With dead ends: 184 [2024-11-27 20:33:36,294 INFO L226 Difference]: Without dead ends: 152 [2024-11-27 20:33:36,295 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 [2024-11-27 20:33:36,296 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, 1.0s IncrementalHoareTripleChecker+Time [2024-11-27 20:33:36,296 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [49 Valid, 613 Invalid, 98 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 95 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2024-11-27 20:33:36,297 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2024-11-27 20:33:36,320 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 151. [2024-11-27 20:33:36,321 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) [2024-11-27 20:33:36,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 240 transitions. [2024-11-27 20:33:36,325 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 240 transitions. Word has length 53 [2024-11-27 20:33:36,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-27 20:33:36,326 INFO L471 AbstractCegarLoop]: Abstraction has 151 states and 240 transitions. [2024-11-27 20:33:36,326 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) [2024-11-27 20:33:36,327 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 240 transitions. [2024-11-27 20:33:36,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2024-11-27 20:33:36,329 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 20:33:36,329 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] [2024-11-27 20:33:36,342 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c49d284e-bc07-42e7-90ac-bbc98e65a8a0/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2024-11-27 20:33:36,529 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c49d284e-bc07-42e7-90ac-bbc98e65a8a0/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 20:33:36,530 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-27 20:33:36,530 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 20:33:36,530 INFO L85 PathProgramCache]: Analyzing trace with hash -1884624626, now seen corresponding path program 1 times [2024-11-27 20:33:36,530 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-27 20:33:36,530 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1920729296] [2024-11-27 20:33:36,531 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 20:33:36,531 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 20:33:36,531 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c49d284e-bc07-42e7-90ac-bbc98e65a8a0/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 20:33:36,533 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c49d284e-bc07-42e7-90ac-bbc98e65a8a0/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 20:33:36,534 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c49d284e-bc07-42e7-90ac-bbc98e65a8a0/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-11-27 20:33:36,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 20:33:36,602 INFO L256 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-11-27 20:33:36,604 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 20:33:37,334 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2024-11-27 20:33:37,334 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-27 20:33:37,792 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2024-11-27 20:33:37,792 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-27 20:33:37,792 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1920729296] [2024-11-27 20:33:37,792 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1920729296] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-27 20:33:37,792 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-27 20:33:37,792 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2024-11-27 20:33:37,792 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [121503621] [2024-11-27 20:33:37,793 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-27 20:33:37,793 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-27 20:33:37,793 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-27 20:33:37,794 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-27 20:33:37,794 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2024-11-27 20:33:37,794 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) [2024-11-27 20:33:38,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 20:33:38,657 INFO L93 Difference]: Finished difference Result 160 states and 248 transitions. [2024-11-27 20:33:38,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-27 20:33:38,659 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 [2024-11-27 20:33:38,659 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 20:33:38,660 INFO L225 Difference]: With dead ends: 160 [2024-11-27 20:33:38,660 INFO L226 Difference]: Without dead ends: 114 [2024-11-27 20:33:38,661 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 [2024-11-27 20:33:38,662 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 [2024-11-27 20:33:38,662 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] [2024-11-27 20:33:38,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2024-11-27 20:33:38,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 114. [2024-11-27 20:33:38,679 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) [2024-11-27 20:33:38,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 175 transitions. [2024-11-27 20:33:38,681 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 175 transitions. Word has length 53 [2024-11-27 20:33:38,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-27 20:33:38,682 INFO L471 AbstractCegarLoop]: Abstraction has 114 states and 175 transitions. [2024-11-27 20:33:38,682 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) [2024-11-27 20:33:38,682 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 175 transitions. [2024-11-27 20:33:38,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2024-11-27 20:33:38,686 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 20:33:38,686 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] [2024-11-27 20:33:38,698 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c49d284e-bc07-42e7-90ac-bbc98e65a8a0/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2024-11-27 20:33:38,887 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c49d284e-bc07-42e7-90ac-bbc98e65a8a0/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 20:33:38,887 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-27 20:33:38,887 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 20:33:38,888 INFO L85 PathProgramCache]: Analyzing trace with hash -2061605462, now seen corresponding path program 2 times [2024-11-27 20:33:38,888 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-27 20:33:38,888 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1504991653] [2024-11-27 20:33:38,888 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-27 20:33:38,888 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 20:33:38,888 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c49d284e-bc07-42e7-90ac-bbc98e65a8a0/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 20:33:38,890 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c49d284e-bc07-42e7-90ac-bbc98e65a8a0/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 20:33:38,891 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c49d284e-bc07-42e7-90ac-bbc98e65a8a0/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2024-11-27 20:33:38,948 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-11-27 20:33:38,948 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 20:33:38,949 INFO L256 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-11-27 20:33:38,951 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 20:33:39,369 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2024-11-27 20:33:39,370 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-27 20:33:39,370 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-27 20:33:39,370 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1504991653] [2024-11-27 20:33:39,370 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1504991653] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-27 20:33:39,370 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-27 20:33:39,370 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-11-27 20:33:39,370 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2123323919] [2024-11-27 20:33:39,370 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-27 20:33:39,371 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-27 20:33:39,371 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-27 20:33:39,372 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-27 20:33:39,372 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-27 20:33:39,372 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) [2024-11-27 20:33:39,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 20:33:39,753 INFO L93 Difference]: Finished difference Result 136 states and 201 transitions. [2024-11-27 20:33:39,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-27 20:33:39,754 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 [2024-11-27 20:33:39,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 20:33:39,755 INFO L225 Difference]: With dead ends: 136 [2024-11-27 20:33:39,756 INFO L226 Difference]: Without dead ends: 120 [2024-11-27 20:33:39,756 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 [2024-11-27 20:33:39,757 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 [2024-11-27 20:33:39,757 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] [2024-11-27 20:33:39,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2024-11-27 20:33:39,773 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 120. [2024-11-27 20:33:39,773 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) [2024-11-27 20:33:39,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 183 transitions. [2024-11-27 20:33:39,775 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 183 transitions. Word has length 53 [2024-11-27 20:33:39,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-27 20:33:39,775 INFO L471 AbstractCegarLoop]: Abstraction has 120 states and 183 transitions. [2024-11-27 20:33:39,776 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) [2024-11-27 20:33:39,776 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 183 transitions. [2024-11-27 20:33:39,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2024-11-27 20:33:39,777 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 20:33:39,778 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] [2024-11-27 20:33:39,786 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c49d284e-bc07-42e7-90ac-bbc98e65a8a0/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2024-11-27 20:33:39,978 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c49d284e-bc07-42e7-90ac-bbc98e65a8a0/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 20:33:39,979 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-27 20:33:39,979 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 20:33:39,979 INFO L85 PathProgramCache]: Analyzing trace with hash -1474799448, now seen corresponding path program 1 times [2024-11-27 20:33:39,979 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-27 20:33:39,979 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1516526134] [2024-11-27 20:33:39,979 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 20:33:39,979 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 20:33:39,980 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c49d284e-bc07-42e7-90ac-bbc98e65a8a0/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 20:33:39,981 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c49d284e-bc07-42e7-90ac-bbc98e65a8a0/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 20:33:39,983 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c49d284e-bc07-42e7-90ac-bbc98e65a8a0/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2024-11-27 20:33:40,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 20:33:40,036 INFO L256 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-11-27 20:33:40,038 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 20:33:40,748 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2024-11-27 20:33:40,748 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-27 20:33:42,196 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2024-11-27 20:33:42,197 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-27 20:33:42,197 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1516526134] [2024-11-27 20:33:42,197 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1516526134] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-27 20:33:42,197 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-27 20:33:42,197 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2024-11-27 20:33:42,197 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1115748151] [2024-11-27 20:33:42,197 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-27 20:33:42,198 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-11-27 20:33:42,198 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-27 20:33:42,198 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-11-27 20:33:42,198 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2024-11-27 20:33:42,199 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) [2024-11-27 20:33:43,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 20:33:43,550 INFO L93 Difference]: Finished difference Result 229 states and 342 transitions. [2024-11-27 20:33:43,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-27 20:33:43,551 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 [2024-11-27 20:33:43,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 20:33:43,552 INFO L225 Difference]: With dead ends: 229 [2024-11-27 20:33:43,553 INFO L226 Difference]: Without dead ends: 185 [2024-11-27 20:33:43,553 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2024-11-27 20:33:43,554 INFO L435 NwaCegarLoop]: 84 mSDtfsCounter, 58 mSDsluCounter, 702 mSDsCounter, 0 mSdLazyCounter, 105 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 786 SdHoareTripleChecker+Invalid, 108 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 105 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2024-11-27 20:33:43,554 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [58 Valid, 786 Invalid, 108 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 105 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2024-11-27 20:33:43,555 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2024-11-27 20:33:43,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 150. [2024-11-27 20:33:43,573 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) [2024-11-27 20:33:43,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 240 transitions. [2024-11-27 20:33:43,575 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 240 transitions. Word has length 53 [2024-11-27 20:33:43,576 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-27 20:33:43,576 INFO L471 AbstractCegarLoop]: Abstraction has 150 states and 240 transitions. [2024-11-27 20:33:43,576 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) [2024-11-27 20:33:43,576 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 240 transitions. [2024-11-27 20:33:43,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2024-11-27 20:33:43,578 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 20:33:43,578 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] [2024-11-27 20:33:43,586 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c49d284e-bc07-42e7-90ac-bbc98e65a8a0/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2024-11-27 20:33:43,779 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c49d284e-bc07-42e7-90ac-bbc98e65a8a0/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 20:33:43,779 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-27 20:33:43,779 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 20:33:43,779 INFO L85 PathProgramCache]: Analyzing trace with hash -1143048730, now seen corresponding path program 3 times [2024-11-27 20:33:43,780 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-27 20:33:43,780 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1100025320] [2024-11-27 20:33:43,780 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-27 20:33:43,780 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 20:33:43,780 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c49d284e-bc07-42e7-90ac-bbc98e65a8a0/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 20:33:43,782 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c49d284e-bc07-42e7-90ac-bbc98e65a8a0/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 20:33:43,784 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c49d284e-bc07-42e7-90ac-bbc98e65a8a0/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2024-11-27 20:33:43,870 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-11-27 20:33:43,870 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 20:33:43,875 INFO L256 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-11-27 20:33:43,877 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 20:33:45,201 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 4 proven. 13 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2024-11-27 20:33:45,201 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-27 20:33:47,772 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 4 proven. 13 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2024-11-27 20:33:47,772 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-27 20:33:47,772 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1100025320] [2024-11-27 20:33:47,773 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1100025320] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-27 20:33:47,773 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-27 20:33:47,773 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2024-11-27 20:33:47,773 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1417850269] [2024-11-27 20:33:47,773 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-27 20:33:47,773 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-11-27 20:33:47,773 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-27 20:33:47,774 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-11-27 20:33:47,774 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=197, Unknown=0, NotChecked=0, Total=240 [2024-11-27 20:33:47,774 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) [2024-11-27 20:33:54,797 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 20:33:54,797 INFO L93 Difference]: Finished difference Result 264 states and 445 transitions. [2024-11-27 20:33:54,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2024-11-27 20:33:54,798 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 [2024-11-27 20:33:54,798 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 20:33:54,801 INFO L225 Difference]: With dead ends: 264 [2024-11-27 20:33:54,801 INFO L226 Difference]: Without dead ends: 245 [2024-11-27 20:33:54,802 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 91 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=103, Invalid=497, Unknown=0, NotChecked=0, Total=600 [2024-11-27 20:33:54,803 INFO L435 NwaCegarLoop]: 67 mSDtfsCounter, 70 mSDsluCounter, 502 mSDsCounter, 0 mSdLazyCounter, 396 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.8s 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, 4.9s IncrementalHoareTripleChecker+Time [2024-11-27 20:33:54,803 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [70 Valid, 569 Invalid, 412 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 396 Invalid, 0 Unknown, 0 Unchecked, 4.9s Time] [2024-11-27 20:33:54,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 245 states. [2024-11-27 20:33:54,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 245 to 155. [2024-11-27 20:33:54,827 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) [2024-11-27 20:33:54,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 267 transitions. [2024-11-27 20:33:54,834 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 267 transitions. Word has length 53 [2024-11-27 20:33:54,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-27 20:33:54,835 INFO L471 AbstractCegarLoop]: Abstraction has 155 states and 267 transitions. [2024-11-27 20:33:54,835 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) [2024-11-27 20:33:54,835 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 267 transitions. [2024-11-27 20:33:54,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2024-11-27 20:33:54,837 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 20:33:54,837 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] [2024-11-27 20:33:54,852 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c49d284e-bc07-42e7-90ac-bbc98e65a8a0/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2024-11-27 20:33:55,041 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c49d284e-bc07-42e7-90ac-bbc98e65a8a0/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 20:33:55,042 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-27 20:33:55,042 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 20:33:55,042 INFO L85 PathProgramCache]: Analyzing trace with hash -1617015324, now seen corresponding path program 2 times [2024-11-27 20:33:55,042 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-27 20:33:55,042 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [389750438] [2024-11-27 20:33:55,042 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-27 20:33:55,043 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 20:33:55,043 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c49d284e-bc07-42e7-90ac-bbc98e65a8a0/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 20:33:55,045 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c49d284e-bc07-42e7-90ac-bbc98e65a8a0/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 20:33:55,046 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c49d284e-bc07-42e7-90ac-bbc98e65a8a0/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2024-11-27 20:33:55,101 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-11-27 20:33:55,101 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 20:33:55,103 INFO L256 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-27 20:33:55,104 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 20:33:55,451 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2024-11-27 20:33:55,451 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-27 20:33:55,451 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-27 20:33:55,451 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [389750438] [2024-11-27 20:33:55,451 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [389750438] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-27 20:33:55,451 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-27 20:33:55,451 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-27 20:33:55,452 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1041808167] [2024-11-27 20:33:55,452 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-27 20:33:55,452 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-27 20:33:55,452 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-27 20:33:55,452 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-27 20:33:55,453 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-27 20:33:55,453 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) [2024-11-27 20:33:55,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 20:33:55,871 INFO L93 Difference]: Finished difference Result 174 states and 287 transitions. [2024-11-27 20:33:55,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-27 20:33:55,871 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 [2024-11-27 20:33:55,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 20:33:55,873 INFO L225 Difference]: With dead ends: 174 [2024-11-27 20:33:55,873 INFO L226 Difference]: Without dead ends: 158 [2024-11-27 20:33:55,874 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 [2024-11-27 20:33:55,874 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 [2024-11-27 20:33:55,874 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] [2024-11-27 20:33:55,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2024-11-27 20:33:55,895 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 154. [2024-11-27 20:33:55,896 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) [2024-11-27 20:33:55,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 265 transitions. [2024-11-27 20:33:55,898 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 265 transitions. Word has length 53 [2024-11-27 20:33:55,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-27 20:33:55,898 INFO L471 AbstractCegarLoop]: Abstraction has 154 states and 265 transitions. [2024-11-27 20:33:55,899 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) [2024-11-27 20:33:55,899 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 265 transitions. [2024-11-27 20:33:55,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2024-11-27 20:33:55,901 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 20:33:55,901 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] [2024-11-27 20:33:55,914 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c49d284e-bc07-42e7-90ac-bbc98e65a8a0/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2024-11-27 20:33:56,102 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c49d284e-bc07-42e7-90ac-bbc98e65a8a0/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 20:33:56,102 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-27 20:33:56,102 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 20:33:56,102 INFO L85 PathProgramCache]: Analyzing trace with hash -1915623849, now seen corresponding path program 1 times [2024-11-27 20:33:56,103 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-27 20:33:56,103 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [598099848] [2024-11-27 20:33:56,103 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 20:33:56,103 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 20:33:56,103 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c49d284e-bc07-42e7-90ac-bbc98e65a8a0/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 20:33:56,107 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c49d284e-bc07-42e7-90ac-bbc98e65a8a0/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 20:33:56,110 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c49d284e-bc07-42e7-90ac-bbc98e65a8a0/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2024-11-27 20:33:56,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 20:33:56,185 INFO L256 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 15 conjuncts are in the unsatisfiable core [2024-11-27 20:33:56,187 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 20:33:58,570 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 10 proven. 11 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-27 20:33:58,570 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-27 20:34:02,895 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 10 proven. 11 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-27 20:34:02,896 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-27 20:34:02,896 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [598099848] [2024-11-27 20:34:02,896 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [598099848] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-27 20:34:02,896 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-27 20:34:02,896 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2024-11-27 20:34:02,897 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1657584619] [2024-11-27 20:34:02,897 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-27 20:34:02,897 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-11-27 20:34:02,897 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-27 20:34:02,897 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-11-27 20:34:02,898 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=400, Unknown=0, NotChecked=0, Total=462 [2024-11-27 20:34:02,898 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) [2024-11-27 20:34:17,756 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 20:34:17,756 INFO L93 Difference]: Finished difference Result 283 states and 535 transitions. [2024-11-27 20:34:17,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2024-11-27 20:34:17,757 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 [2024-11-27 20:34:17,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 20:34:17,760 INFO L225 Difference]: With dead ends: 283 [2024-11-27 20:34:17,760 INFO L226 Difference]: Without dead ends: 262 [2024-11-27 20:34:17,761 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 84 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 427 ImplicationChecksByTransitivity, 12.3s TimeCoverageRelationStatistics Valid=315, Invalid=1847, Unknown=0, NotChecked=0, Total=2162 [2024-11-27 20:34:17,762 INFO L435 NwaCegarLoop]: 64 mSDtfsCounter, 128 mSDsluCounter, 752 mSDsCounter, 0 mSdLazyCounter, 640 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.2s 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, 7.3s IncrementalHoareTripleChecker+Time [2024-11-27 20:34:17,762 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [134 Valid, 816 Invalid, 674 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 640 Invalid, 0 Unknown, 0 Unchecked, 7.3s Time] [2024-11-27 20:34:17,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 262 states. [2024-11-27 20:34:17,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 262 to 157. [2024-11-27 20:34:17,790 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) [2024-11-27 20:34:17,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 271 transitions. [2024-11-27 20:34:17,792 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 271 transitions. Word has length 53 [2024-11-27 20:34:17,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-27 20:34:17,793 INFO L471 AbstractCegarLoop]: Abstraction has 157 states and 271 transitions. [2024-11-27 20:34:17,793 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) [2024-11-27 20:34:17,793 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 271 transitions. [2024-11-27 20:34:17,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2024-11-27 20:34:17,795 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 20:34:17,795 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] [2024-11-27 20:34:17,806 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c49d284e-bc07-42e7-90ac-bbc98e65a8a0/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2024-11-27 20:34:17,999 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c49d284e-bc07-42e7-90ac-bbc98e65a8a0/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 20:34:18,000 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-27 20:34:18,000 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 20:34:18,000 INFO L85 PathProgramCache]: Analyzing trace with hash -1267341752, now seen corresponding path program 1 times [2024-11-27 20:34:18,000 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-27 20:34:18,001 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2040217542] [2024-11-27 20:34:18,001 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 20:34:18,001 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 20:34:18,001 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c49d284e-bc07-42e7-90ac-bbc98e65a8a0/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 20:34:18,002 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c49d284e-bc07-42e7-90ac-bbc98e65a8a0/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 20:34:18,004 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c49d284e-bc07-42e7-90ac-bbc98e65a8a0/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2024-11-27 20:34:18,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 20:34:18,062 INFO L256 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 13 conjuncts are in the unsatisfiable core [2024-11-27 20:34:18,064 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 20:34:19,920 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 10 proven. 12 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-11-27 20:34:19,921 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-27 20:34:22,935 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 10 proven. 12 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-11-27 20:34:22,935 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-27 20:34:22,935 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2040217542] [2024-11-27 20:34:22,935 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2040217542] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-27 20:34:22,935 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-27 20:34:22,935 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2024-11-27 20:34:22,935 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [287202928] [2024-11-27 20:34:22,935 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-27 20:34:22,936 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-11-27 20:34:22,936 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-27 20:34:22,936 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-11-27 20:34:22,937 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2024-11-27 20:34:22,937 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) [2024-11-27 20:34:32,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 20:34:32,819 INFO L93 Difference]: Finished difference Result 321 states and 628 transitions. [2024-11-27 20:34:32,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2024-11-27 20:34:32,820 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 [2024-11-27 20:34:32,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 20:34:32,823 INFO L225 Difference]: With dead ends: 321 [2024-11-27 20:34:32,824 INFO L226 Difference]: Without dead ends: 308 [2024-11-27 20:34:32,825 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 92 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 176 ImplicationChecksByTransitivity, 6.8s TimeCoverageRelationStatistics Valid=144, Invalid=912, Unknown=0, NotChecked=0, Total=1056 [2024-11-27 20:34:32,826 INFO L435 NwaCegarLoop]: 47 mSDtfsCounter, 126 mSDsluCounter, 591 mSDsCounter, 0 mSdLazyCounter, 499 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.1s 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, 6.2s IncrementalHoareTripleChecker+Time [2024-11-27 20:34:32,826 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [135 Valid, 638 Invalid, 516 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 499 Invalid, 0 Unknown, 0 Unchecked, 6.2s Time] [2024-11-27 20:34:32,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 308 states. [2024-11-27 20:34:32,866 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 308 to 203. [2024-11-27 20:34:32,869 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) [2024-11-27 20:34:32,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 203 states to 203 states and 400 transitions. [2024-11-27 20:34:32,871 INFO L78 Accepts]: Start accepts. Automaton has 203 states and 400 transitions. Word has length 54 [2024-11-27 20:34:32,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-27 20:34:32,872 INFO L471 AbstractCegarLoop]: Abstraction has 203 states and 400 transitions. [2024-11-27 20:34:32,872 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) [2024-11-27 20:34:32,872 INFO L276 IsEmpty]: Start isEmpty. Operand 203 states and 400 transitions. [2024-11-27 20:34:32,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2024-11-27 20:34:32,876 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 20:34:32,876 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] [2024-11-27 20:34:32,889 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c49d284e-bc07-42e7-90ac-bbc98e65a8a0/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2024-11-27 20:34:33,076 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c49d284e-bc07-42e7-90ac-bbc98e65a8a0/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 20:34:33,077 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-27 20:34:33,077 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 20:34:33,077 INFO L85 PathProgramCache]: Analyzing trace with hash -457995126, now seen corresponding path program 1 times [2024-11-27 20:34:33,077 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-27 20:34:33,077 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [887291349] [2024-11-27 20:34:33,078 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 20:34:33,078 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 20:34:33,078 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c49d284e-bc07-42e7-90ac-bbc98e65a8a0/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 20:34:33,080 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c49d284e-bc07-42e7-90ac-bbc98e65a8a0/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 20:34:33,084 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c49d284e-bc07-42e7-90ac-bbc98e65a8a0/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2024-11-27 20:34:33,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 20:34:33,168 INFO L256 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-11-27 20:34:33,170 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 20:34:33,343 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2024-11-27 20:34:33,344 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-27 20:34:33,344 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-27 20:34:33,344 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [887291349] [2024-11-27 20:34:33,344 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [887291349] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-27 20:34:33,344 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-27 20:34:33,344 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-27 20:34:33,344 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [302463417] [2024-11-27 20:34:33,344 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-27 20:34:33,345 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-27 20:34:33,345 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-27 20:34:33,346 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-27 20:34:33,346 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-27 20:34:33,346 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) [2024-11-27 20:34:33,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 20:34:33,491 INFO L93 Difference]: Finished difference Result 216 states and 413 transitions. [2024-11-27 20:34:33,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-27 20:34:33,492 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 [2024-11-27 20:34:33,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 20:34:33,494 INFO L225 Difference]: With dead ends: 216 [2024-11-27 20:34:33,494 INFO L226 Difference]: Without dead ends: 177 [2024-11-27 20:34:33,495 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 [2024-11-27 20:34:33,497 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 [2024-11-27 20:34:33,497 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] [2024-11-27 20:34:33,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2024-11-27 20:34:33,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 151. [2024-11-27 20:34:33,524 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) [2024-11-27 20:34:33,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 312 transitions. [2024-11-27 20:34:33,526 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 312 transitions. Word has length 54 [2024-11-27 20:34:33,526 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-27 20:34:33,526 INFO L471 AbstractCegarLoop]: Abstraction has 151 states and 312 transitions. [2024-11-27 20:34:33,527 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) [2024-11-27 20:34:33,527 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 312 transitions. [2024-11-27 20:34:33,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2024-11-27 20:34:33,530 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 20:34:33,530 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] [2024-11-27 20:34:33,543 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c49d284e-bc07-42e7-90ac-bbc98e65a8a0/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2024-11-27 20:34:33,731 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c49d284e-bc07-42e7-90ac-bbc98e65a8a0/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 20:34:33,731 INFO L396 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-27 20:34:33,731 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 20:34:33,732 INFO L85 PathProgramCache]: Analyzing trace with hash 1438113164, now seen corresponding path program 2 times [2024-11-27 20:34:33,732 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-27 20:34:33,732 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1283241482] [2024-11-27 20:34:33,732 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-27 20:34:33,732 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 20:34:33,732 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c49d284e-bc07-42e7-90ac-bbc98e65a8a0/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 20:34:33,734 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c49d284e-bc07-42e7-90ac-bbc98e65a8a0/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 20:34:33,735 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c49d284e-bc07-42e7-90ac-bbc98e65a8a0/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2024-11-27 20:34:33,797 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-11-27 20:34:33,797 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 20:34:33,798 INFO L256 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-11-27 20:34:33,799 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 20:34:34,139 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2024-11-27 20:34:34,140 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-27 20:34:34,140 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-27 20:34:34,140 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1283241482] [2024-11-27 20:34:34,140 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1283241482] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-27 20:34:34,140 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-27 20:34:34,140 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-27 20:34:34,140 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1806945706] [2024-11-27 20:34:34,140 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-27 20:34:34,141 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-27 20:34:34,141 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-27 20:34:34,141 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-27 20:34:34,141 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-27 20:34:34,142 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) [2024-11-27 20:34:34,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 20:34:34,484 INFO L93 Difference]: Finished difference Result 171 states and 332 transitions. [2024-11-27 20:34:34,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-27 20:34:34,486 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 [2024-11-27 20:34:34,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 20:34:34,488 INFO L225 Difference]: With dead ends: 171 [2024-11-27 20:34:34,488 INFO L226 Difference]: Without dead ends: 159 [2024-11-27 20:34:34,489 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 [2024-11-27 20:34:34,489 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 [2024-11-27 20:34:34,489 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] [2024-11-27 20:34:34,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2024-11-27 20:34:34,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 158. [2024-11-27 20:34:34,518 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) [2024-11-27 20:34:34,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 316 transitions. [2024-11-27 20:34:34,520 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 316 transitions. Word has length 54 [2024-11-27 20:34:34,520 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-27 20:34:34,521 INFO L471 AbstractCegarLoop]: Abstraction has 158 states and 316 transitions. [2024-11-27 20:34:34,521 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) [2024-11-27 20:34:34,521 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 316 transitions. [2024-11-27 20:34:34,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2024-11-27 20:34:34,524 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 20:34:34,525 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] [2024-11-27 20:34:34,537 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c49d284e-bc07-42e7-90ac-bbc98e65a8a0/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2024-11-27 20:34:34,725 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c49d284e-bc07-42e7-90ac-bbc98e65a8a0/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 20:34:34,725 INFO L396 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-27 20:34:34,726 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 20:34:34,726 INFO L85 PathProgramCache]: Analyzing trace with hash -1686260354, now seen corresponding path program 2 times [2024-11-27 20:34:34,726 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-27 20:34:34,726 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1305011428] [2024-11-27 20:34:34,726 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-27 20:34:34,726 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 20:34:34,726 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c49d284e-bc07-42e7-90ac-bbc98e65a8a0/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 20:34:34,728 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c49d284e-bc07-42e7-90ac-bbc98e65a8a0/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 20:34:34,730 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c49d284e-bc07-42e7-90ac-bbc98e65a8a0/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2024-11-27 20:34:34,809 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-27 20:34:34,809 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 20:34:34,811 INFO L256 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-11-27 20:34:34,812 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 20:34:36,234 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 17 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2024-11-27 20:34:36,234 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-27 20:34:39,124 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 17 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2024-11-27 20:34:39,124 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-27 20:34:39,124 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1305011428] [2024-11-27 20:34:39,124 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1305011428] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-27 20:34:39,124 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-27 20:34:39,124 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2024-11-27 20:34:39,124 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [938847948] [2024-11-27 20:34:39,125 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-27 20:34:39,125 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-11-27 20:34:39,125 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-27 20:34:39,126 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-11-27 20:34:39,126 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2024-11-27 20:34:39,126 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) [2024-11-27 20:34:48,922 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.79s for a HTC check with result INVALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2024-11-27 20:34:49,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 20:34:49,315 INFO L93 Difference]: Finished difference Result 267 states and 501 transitions. [2024-11-27 20:34:49,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2024-11-27 20:34:49,315 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 [2024-11-27 20:34:49,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 20:34:49,318 INFO L225 Difference]: With dead ends: 267 [2024-11-27 20:34:49,319 INFO L226 Difference]: Without dead ends: 252 [2024-11-27 20:34:49,320 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 93 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=95, Invalid=457, Unknown=0, NotChecked=0, Total=552 [2024-11-27 20:34:49,321 INFO L435 NwaCegarLoop]: 64 mSDtfsCounter, 72 mSDsluCounter, 613 mSDsCounter, 0 mSdLazyCounter, 406 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.3s 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, 8.4s IncrementalHoareTripleChecker+Time [2024-11-27 20:34:49,321 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [72 Valid, 677 Invalid, 430 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 406 Invalid, 0 Unknown, 0 Unchecked, 8.4s Time] [2024-11-27 20:34:49,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 252 states. [2024-11-27 20:34:49,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 252 to 152. [2024-11-27 20:34:49,355 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) [2024-11-27 20:34:49,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 289 transitions. [2024-11-27 20:34:49,357 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 289 transitions. Word has length 55 [2024-11-27 20:34:49,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-27 20:34:49,357 INFO L471 AbstractCegarLoop]: Abstraction has 152 states and 289 transitions. [2024-11-27 20:34:49,358 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) [2024-11-27 20:34:49,358 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 289 transitions. [2024-11-27 20:34:49,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2024-11-27 20:34:49,361 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 20:34:49,361 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] [2024-11-27 20:34:49,373 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c49d284e-bc07-42e7-90ac-bbc98e65a8a0/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2024-11-27 20:34:49,561 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c49d284e-bc07-42e7-90ac-bbc98e65a8a0/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 20:34:49,562 INFO L396 AbstractCegarLoop]: === Iteration 25 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-27 20:34:49,562 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 20:34:49,562 INFO L85 PathProgramCache]: Analyzing trace with hash 495166849, now seen corresponding path program 1 times [2024-11-27 20:34:49,562 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-27 20:34:49,563 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1222080546] [2024-11-27 20:34:49,563 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 20:34:49,563 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 20:34:49,563 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c49d284e-bc07-42e7-90ac-bbc98e65a8a0/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 20:34:49,565 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c49d284e-bc07-42e7-90ac-bbc98e65a8a0/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 20:34:49,566 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c49d284e-bc07-42e7-90ac-bbc98e65a8a0/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2024-11-27 20:34:49,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 20:34:49,644 INFO L256 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-11-27 20:34:49,645 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 20:34:50,118 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 29 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-27 20:34:50,118 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-27 20:34:50,118 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-27 20:34:50,118 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1222080546] [2024-11-27 20:34:50,118 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1222080546] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-27 20:34:50,119 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-27 20:34:50,119 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-27 20:34:50,119 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [711399667] [2024-11-27 20:34:50,119 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-27 20:34:50,119 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-27 20:34:50,119 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-27 20:34:50,120 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-27 20:34:50,120 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-27 20:34:50,120 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) [2024-11-27 20:34:50,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 20:34:50,887 INFO L93 Difference]: Finished difference Result 270 states and 463 transitions. [2024-11-27 20:34:50,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-27 20:34:50,888 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 [2024-11-27 20:34:50,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 20:34:50,891 INFO L225 Difference]: With dead ends: 270 [2024-11-27 20:34:50,891 INFO L226 Difference]: Without dead ends: 159 [2024-11-27 20:34:50,892 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 [2024-11-27 20:34:50,893 INFO L435 NwaCegarLoop]: 56 mSDtfsCounter, 12 mSDsluCounter, 99 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s 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, 0.6s IncrementalHoareTripleChecker+Time [2024-11-27 20:34:50,893 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 155 Invalid, 51 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-11-27 20:34:50,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2024-11-27 20:34:50,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 156. [2024-11-27 20:34:50,933 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) [2024-11-27 20:34:50,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 307 transitions. [2024-11-27 20:34:50,935 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 307 transitions. Word has length 55 [2024-11-27 20:34:50,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-27 20:34:50,936 INFO L471 AbstractCegarLoop]: Abstraction has 156 states and 307 transitions. [2024-11-27 20:34:50,936 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) [2024-11-27 20:34:50,936 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 307 transitions. [2024-11-27 20:34:50,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2024-11-27 20:34:50,943 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 20:34:50,943 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] [2024-11-27 20:34:50,958 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c49d284e-bc07-42e7-90ac-bbc98e65a8a0/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Ended with exit code 0 [2024-11-27 20:34:51,143 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c49d284e-bc07-42e7-90ac-bbc98e65a8a0/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 20:34:51,144 INFO L396 AbstractCegarLoop]: === Iteration 26 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-27 20:34:51,144 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 20:34:51,144 INFO L85 PathProgramCache]: Analyzing trace with hash -469885383, now seen corresponding path program 1 times [2024-11-27 20:34:51,144 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-27 20:34:51,144 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1523490594] [2024-11-27 20:34:51,145 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 20:34:51,145 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 20:34:51,145 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c49d284e-bc07-42e7-90ac-bbc98e65a8a0/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 20:34:51,147 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c49d284e-bc07-42e7-90ac-bbc98e65a8a0/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 20:34:51,148 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c49d284e-bc07-42e7-90ac-bbc98e65a8a0/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2024-11-27 20:34:51,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 20:34:51,224 INFO L256 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-11-27 20:34:51,225 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 20:34:52,865 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 4 proven. 13 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2024-11-27 20:34:52,865 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-27 20:34:56,393 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 4 proven. 13 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2024-11-27 20:34:56,393 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-27 20:34:56,393 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1523490594] [2024-11-27 20:34:56,393 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1523490594] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-27 20:34:56,393 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-27 20:34:56,393 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2024-11-27 20:34:56,393 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2142813007] [2024-11-27 20:34:56,393 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-27 20:34:56,395 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-11-27 20:34:56,395 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-27 20:34:56,396 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-11-27 20:34:56,398 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=321, Unknown=0, NotChecked=0, Total=380 [2024-11-27 20:34:56,399 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) [2024-11-27 20:35:08,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 20:35:08,215 INFO L93 Difference]: Finished difference Result 283 states and 584 transitions. [2024-11-27 20:35:08,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2024-11-27 20:35:08,216 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 [2024-11-27 20:35:08,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 20:35:08,219 INFO L225 Difference]: With dead ends: 283 [2024-11-27 20:35:08,220 INFO L226 Difference]: Without dead ends: 268 [2024-11-27 20:35:08,221 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 95 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 181 ImplicationChecksByTransitivity, 7.4s TimeCoverageRelationStatistics Valid=193, Invalid=929, Unknown=0, NotChecked=0, Total=1122 [2024-11-27 20:35:08,222 INFO L435 NwaCegarLoop]: 86 mSDtfsCounter, 118 mSDsluCounter, 838 mSDsCounter, 0 mSdLazyCounter, 730 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.7s 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, 7.9s IncrementalHoareTripleChecker+Time [2024-11-27 20:35:08,222 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [118 Valid, 924 Invalid, 754 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 730 Invalid, 0 Unknown, 0 Unchecked, 7.9s Time] [2024-11-27 20:35:08,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 268 states. [2024-11-27 20:35:08,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 268 to 146. [2024-11-27 20:35:08,255 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) [2024-11-27 20:35:08,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 265 transitions. [2024-11-27 20:35:08,257 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 265 transitions. Word has length 56 [2024-11-27 20:35:08,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-27 20:35:08,257 INFO L471 AbstractCegarLoop]: Abstraction has 146 states and 265 transitions. [2024-11-27 20:35:08,257 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) [2024-11-27 20:35:08,257 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 265 transitions. [2024-11-27 20:35:08,259 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2024-11-27 20:35:08,260 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 20:35:08,260 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] [2024-11-27 20:35:08,270 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c49d284e-bc07-42e7-90ac-bbc98e65a8a0/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2024-11-27 20:35:08,460 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c49d284e-bc07-42e7-90ac-bbc98e65a8a0/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 20:35:08,461 INFO L396 AbstractCegarLoop]: === Iteration 27 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-27 20:35:08,461 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 20:35:08,461 INFO L85 PathProgramCache]: Analyzing trace with hash -2036817359, now seen corresponding path program 1 times [2024-11-27 20:35:08,461 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-27 20:35:08,461 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [670498431] [2024-11-27 20:35:08,462 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 20:35:08,462 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 20:35:08,462 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c49d284e-bc07-42e7-90ac-bbc98e65a8a0/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 20:35:08,464 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c49d284e-bc07-42e7-90ac-bbc98e65a8a0/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 20:35:08,466 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c49d284e-bc07-42e7-90ac-bbc98e65a8a0/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2024-11-27 20:35:08,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 20:35:08,532 INFO L256 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-11-27 20:35:08,534 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 20:35:09,105 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 27 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-27 20:35:09,105 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-27 20:35:09,106 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-27 20:35:09,106 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [670498431] [2024-11-27 20:35:09,106 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [670498431] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-27 20:35:09,106 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-27 20:35:09,106 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-11-27 20:35:09,106 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1767514687] [2024-11-27 20:35:09,106 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-27 20:35:09,107 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-27 20:35:09,107 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-27 20:35:09,108 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-27 20:35:09,108 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-11-27 20:35:09,108 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) [2024-11-27 20:35:10,063 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 20:35:10,064 INFO L93 Difference]: Finished difference Result 267 states and 442 transitions. [2024-11-27 20:35:10,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-27 20:35:10,065 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 [2024-11-27 20:35:10,065 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 20:35:10,066 INFO L225 Difference]: With dead ends: 267 [2024-11-27 20:35:10,066 INFO L226 Difference]: Without dead ends: 156 [2024-11-27 20:35:10,067 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 [2024-11-27 20:35:10,067 INFO L435 NwaCegarLoop]: 55 mSDtfsCounter, 17 mSDsluCounter, 146 mSDsCounter, 0 mSdLazyCounter, 85 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 201 SdHoareTripleChecker+Invalid, 85 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 85 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2024-11-27 20:35:10,067 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 201 Invalid, 85 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 85 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2024-11-27 20:35:10,068 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2024-11-27 20:35:10,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 146. [2024-11-27 20:35:10,092 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) [2024-11-27 20:35:10,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 265 transitions. [2024-11-27 20:35:10,094 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 265 transitions. Word has length 56 [2024-11-27 20:35:10,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-27 20:35:10,094 INFO L471 AbstractCegarLoop]: Abstraction has 146 states and 265 transitions. [2024-11-27 20:35:10,094 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) [2024-11-27 20:35:10,094 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 265 transitions. [2024-11-27 20:35:10,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2024-11-27 20:35:10,096 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 20:35:10,097 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] [2024-11-27 20:35:10,108 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c49d284e-bc07-42e7-90ac-bbc98e65a8a0/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2024-11-27 20:35:10,297 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c49d284e-bc07-42e7-90ac-bbc98e65a8a0/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 20:35:10,297 INFO L396 AbstractCegarLoop]: === Iteration 28 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-27 20:35:10,298 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 20:35:10,298 INFO L85 PathProgramCache]: Analyzing trace with hash -413109599, now seen corresponding path program 1 times [2024-11-27 20:35:10,298 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-27 20:35:10,298 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1314026868] [2024-11-27 20:35:10,298 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 20:35:10,298 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 20:35:10,298 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c49d284e-bc07-42e7-90ac-bbc98e65a8a0/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 20:35:10,300 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c49d284e-bc07-42e7-90ac-bbc98e65a8a0/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 20:35:10,301 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c49d284e-bc07-42e7-90ac-bbc98e65a8a0/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2024-11-27 20:35:10,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 20:35:10,366 INFO L256 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 15 conjuncts are in the unsatisfiable core [2024-11-27 20:35:10,369 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 20:35:11,313 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2024-11-27 20:35:11,313 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-27 20:35:11,313 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-27 20:35:11,313 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1314026868] [2024-11-27 20:35:11,313 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1314026868] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-27 20:35:11,314 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-27 20:35:11,314 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-11-27 20:35:11,314 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [52093497] [2024-11-27 20:35:11,314 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-27 20:35:11,314 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-11-27 20:35:11,314 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-27 20:35:11,315 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-11-27 20:35:11,315 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2024-11-27 20:35:11,315 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) [2024-11-27 20:35:12,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 20:35:12,523 INFO L93 Difference]: Finished difference Result 177 states and 297 transitions. [2024-11-27 20:35:12,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-27 20:35:12,524 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 [2024-11-27 20:35:12,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 20:35:12,526 INFO L225 Difference]: With dead ends: 177 [2024-11-27 20:35:12,526 INFO L226 Difference]: Without dead ends: 156 [2024-11-27 20:35:12,527 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-11-27 20:35:12,527 INFO L435 NwaCegarLoop]: 79 mSDtfsCounter, 19 mSDsluCounter, 488 mSDsCounter, 0 mSdLazyCounter, 93 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s 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, 1.0s IncrementalHoareTripleChecker+Time [2024-11-27 20:35:12,527 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 567 Invalid, 94 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 93 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2024-11-27 20:35:12,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2024-11-27 20:35:12,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 142. [2024-11-27 20:35:12,554 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) [2024-11-27 20:35:12,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 244 transitions. [2024-11-27 20:35:12,555 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 244 transitions. Word has length 57 [2024-11-27 20:35:12,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-27 20:35:12,555 INFO L471 AbstractCegarLoop]: Abstraction has 142 states and 244 transitions. [2024-11-27 20:35:12,555 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) [2024-11-27 20:35:12,556 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 244 transitions. [2024-11-27 20:35:12,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2024-11-27 20:35:12,557 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 20:35:12,557 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] [2024-11-27 20:35:12,570 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c49d284e-bc07-42e7-90ac-bbc98e65a8a0/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Ended with exit code 0 [2024-11-27 20:35:12,758 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c49d284e-bc07-42e7-90ac-bbc98e65a8a0/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 20:35:12,758 INFO L396 AbstractCegarLoop]: === Iteration 29 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-27 20:35:12,758 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 20:35:12,758 INFO L85 PathProgramCache]: Analyzing trace with hash 1851614173, now seen corresponding path program 1 times [2024-11-27 20:35:12,759 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-27 20:35:12,759 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2034221187] [2024-11-27 20:35:12,759 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 20:35:12,759 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 20:35:12,759 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c49d284e-bc07-42e7-90ac-bbc98e65a8a0/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 20:35:12,760 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c49d284e-bc07-42e7-90ac-bbc98e65a8a0/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 20:35:12,761 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c49d284e-bc07-42e7-90ac-bbc98e65a8a0/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2024-11-27 20:35:12,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 20:35:12,823 INFO L256 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-11-27 20:35:12,823 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 20:35:13,087 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 32 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-11-27 20:35:13,087 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-27 20:35:13,087 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-27 20:35:13,087 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2034221187] [2024-11-27 20:35:13,087 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2034221187] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-27 20:35:13,088 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-27 20:35:13,088 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-27 20:35:13,088 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [251588711] [2024-11-27 20:35:13,088 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-27 20:35:13,088 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-27 20:35:13,088 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-27 20:35:13,088 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-27 20:35:13,089 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-27 20:35:13,089 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) [2024-11-27 20:35:13,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 20:35:13,536 INFO L93 Difference]: Finished difference Result 275 states and 438 transitions. [2024-11-27 20:35:13,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-27 20:35:13,537 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 [2024-11-27 20:35:13,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 20:35:13,538 INFO L225 Difference]: With dead ends: 275 [2024-11-27 20:35:13,539 INFO L226 Difference]: Without dead ends: 145 [2024-11-27 20:35:13,540 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2024-11-27 20:35:13,540 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 [2024-11-27 20:35:13,541 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] [2024-11-27 20:35:13,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2024-11-27 20:35:13,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 116. [2024-11-27 20:35:13,557 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) [2024-11-27 20:35:13,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 166 transitions. [2024-11-27 20:35:13,558 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 166 transitions. Word has length 57 [2024-11-27 20:35:13,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-27 20:35:13,558 INFO L471 AbstractCegarLoop]: Abstraction has 116 states and 166 transitions. [2024-11-27 20:35:13,559 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) [2024-11-27 20:35:13,559 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 166 transitions. [2024-11-27 20:35:13,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2024-11-27 20:35:13,560 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 20:35:13,560 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] [2024-11-27 20:35:13,569 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c49d284e-bc07-42e7-90ac-bbc98e65a8a0/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Ended with exit code 0 [2024-11-27 20:35:13,760 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c49d284e-bc07-42e7-90ac-bbc98e65a8a0/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 20:35:13,760 INFO L396 AbstractCegarLoop]: === Iteration 30 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-27 20:35:13,761 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 20:35:13,761 INFO L85 PathProgramCache]: Analyzing trace with hash -1498287313, now seen corresponding path program 2 times [2024-11-27 20:35:13,761 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-27 20:35:13,761 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1408958558] [2024-11-27 20:35:13,761 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-27 20:35:13,761 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 20:35:13,761 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c49d284e-bc07-42e7-90ac-bbc98e65a8a0/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 20:35:13,763 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c49d284e-bc07-42e7-90ac-bbc98e65a8a0/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 20:35:13,764 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c49d284e-bc07-42e7-90ac-bbc98e65a8a0/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2024-11-27 20:35:13,824 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-27 20:35:13,824 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 20:35:13,825 INFO L256 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-27 20:35:13,826 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 20:35:14,759 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 25 proven. 16 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-27 20:35:14,759 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-27 20:35:17,001 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 4 proven. 25 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2024-11-27 20:35:17,001 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-27 20:35:17,002 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1408958558] [2024-11-27 20:35:17,002 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1408958558] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-27 20:35:17,002 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-27 20:35:17,002 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2024-11-27 20:35:17,002 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [322257684] [2024-11-27 20:35:17,002 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-27 20:35:17,002 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-11-27 20:35:17,002 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-27 20:35:17,003 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-11-27 20:35:17,003 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=121, Unknown=0, NotChecked=0, Total=182 [2024-11-27 20:35:17,003 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) [2024-11-27 20:35:20,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 20:35:20,583 INFO L93 Difference]: Finished difference Result 242 states and 343 transitions. [2024-11-27 20:35:20,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-11-27 20:35:20,585 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 [2024-11-27 20:35:20,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 20:35:20,586 INFO L225 Difference]: With dead ends: 242 [2024-11-27 20:35:20,586 INFO L226 Difference]: Without dead ends: 145 [2024-11-27 20:35:20,586 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=117, Invalid=189, Unknown=0, NotChecked=0, Total=306 [2024-11-27 20:35:20,587 INFO L435 NwaCegarLoop]: 62 mSDtfsCounter, 65 mSDsluCounter, 473 mSDsCounter, 0 mSdLazyCounter, 242 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 535 SdHoareTripleChecker+Invalid, 255 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 242 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2024-11-27 20:35:20,587 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [65 Valid, 535 Invalid, 255 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 242 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2024-11-27 20:35:20,588 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2024-11-27 20:35:20,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 125. [2024-11-27 20:35:20,607 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) [2024-11-27 20:35:20,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 184 transitions. [2024-11-27 20:35:20,608 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 184 transitions. Word has length 57 [2024-11-27 20:35:20,608 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-27 20:35:20,608 INFO L471 AbstractCegarLoop]: Abstraction has 125 states and 184 transitions. [2024-11-27 20:35:20,608 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) [2024-11-27 20:35:20,608 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 184 transitions. [2024-11-27 20:35:20,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2024-11-27 20:35:20,609 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 20:35:20,609 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] [2024-11-27 20:35:20,621 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c49d284e-bc07-42e7-90ac-bbc98e65a8a0/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Ended with exit code 0 [2024-11-27 20:35:20,810 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c49d284e-bc07-42e7-90ac-bbc98e65a8a0/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 20:35:20,810 INFO L396 AbstractCegarLoop]: === Iteration 31 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-27 20:35:20,811 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 20:35:20,811 INFO L85 PathProgramCache]: Analyzing trace with hash -1134918380, now seen corresponding path program 1 times [2024-11-27 20:35:20,811 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-27 20:35:20,811 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [193628309] [2024-11-27 20:35:20,811 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 20:35:20,811 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 20:35:20,811 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c49d284e-bc07-42e7-90ac-bbc98e65a8a0/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 20:35:20,813 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c49d284e-bc07-42e7-90ac-bbc98e65a8a0/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 20:35:20,820 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c49d284e-bc07-42e7-90ac-bbc98e65a8a0/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2024-11-27 20:35:20,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 20:35:20,880 INFO L256 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-11-27 20:35:20,881 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 20:35:21,900 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 27 proven. 2 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-27 20:35:21,900 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-27 20:35:23,538 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 4 proven. 13 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2024-11-27 20:35:23,538 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-27 20:35:23,539 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [193628309] [2024-11-27 20:35:23,539 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [193628309] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-27 20:35:23,539 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-27 20:35:23,539 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2024-11-27 20:35:23,539 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1452690775] [2024-11-27 20:35:23,539 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-27 20:35:23,539 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-11-27 20:35:23,539 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-27 20:35:23,540 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-11-27 20:35:23,540 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=117, Unknown=0, NotChecked=0, Total=182 [2024-11-27 20:35:23,540 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) [2024-11-27 20:35:26,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 20:35:26,344 INFO L93 Difference]: Finished difference Result 242 states and 336 transitions. [2024-11-27 20:35:26,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-11-27 20:35:26,345 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 [2024-11-27 20:35:26,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 20:35:26,346 INFO L225 Difference]: With dead ends: 242 [2024-11-27 20:35:26,346 INFO L226 Difference]: Without dead ends: 140 [2024-11-27 20:35:26,347 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=141, Invalid=239, Unknown=0, NotChecked=0, Total=380 [2024-11-27 20:35:26,347 INFO L435 NwaCegarLoop]: 57 mSDtfsCounter, 95 mSDsluCounter, 297 mSDsCounter, 0 mSdLazyCounter, 198 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 95 SdHoareTripleChecker+Valid, 354 SdHoareTripleChecker+Invalid, 224 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 198 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2024-11-27 20:35:26,347 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [95 Valid, 354 Invalid, 224 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 198 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2024-11-27 20:35:26,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2024-11-27 20:35:26,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 110. [2024-11-27 20:35:26,364 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) [2024-11-27 20:35:26,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 155 transitions. [2024-11-27 20:35:26,365 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 155 transitions. Word has length 58 [2024-11-27 20:35:26,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-27 20:35:26,366 INFO L471 AbstractCegarLoop]: Abstraction has 110 states and 155 transitions. [2024-11-27 20:35:26,366 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) [2024-11-27 20:35:26,366 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 155 transitions. [2024-11-27 20:35:26,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2024-11-27 20:35:26,367 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 20:35:26,367 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] [2024-11-27 20:35:26,378 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c49d284e-bc07-42e7-90ac-bbc98e65a8a0/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2024-11-27 20:35:26,567 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c49d284e-bc07-42e7-90ac-bbc98e65a8a0/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 20:35:26,568 INFO L396 AbstractCegarLoop]: === Iteration 32 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-27 20:35:26,568 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 20:35:26,568 INFO L85 PathProgramCache]: Analyzing trace with hash 1441260235, now seen corresponding path program 2 times [2024-11-27 20:35:26,568 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-27 20:35:26,568 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1450636461] [2024-11-27 20:35:26,568 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-27 20:35:26,568 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 20:35:26,569 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c49d284e-bc07-42e7-90ac-bbc98e65a8a0/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 20:35:26,570 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c49d284e-bc07-42e7-90ac-bbc98e65a8a0/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 20:35:26,571 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c49d284e-bc07-42e7-90ac-bbc98e65a8a0/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2024-11-27 20:35:26,636 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-27 20:35:26,636 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 20:35:26,638 INFO L256 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 19 conjuncts are in the unsatisfiable core [2024-11-27 20:35:26,639 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 20:35:30,151 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 10 proven. 39 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-27 20:35:30,151 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-27 20:35:37,462 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 10 proven. 39 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-27 20:35:37,463 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-27 20:35:37,463 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1450636461] [2024-11-27 20:35:37,463 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1450636461] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-27 20:35:37,463 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-27 20:35:37,463 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 30 [2024-11-27 20:35:37,463 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [557551355] [2024-11-27 20:35:37,463 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-27 20:35:37,464 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2024-11-27 20:35:37,464 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-27 20:35:37,464 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2024-11-27 20:35:37,465 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=752, Unknown=0, NotChecked=0, Total=870 [2024-11-27 20:35:37,465 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) [2024-11-27 20:36:13,491 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 20:36:13,492 INFO L93 Difference]: Finished difference Result 280 states and 477 transitions. [2024-11-27 20:36:13,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2024-11-27 20:36:13,493 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 [2024-11-27 20:36:13,493 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 20:36:13,494 INFO L225 Difference]: With dead ends: 280 [2024-11-27 20:36:13,494 INFO L226 Difference]: Without dead ends: 259 [2024-11-27 20:36:13,496 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 92 SyntacticMatches, 1 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1515 ImplicationChecksByTransitivity, 28.4s TimeCoverageRelationStatistics Valid=1007, Invalid=5155, Unknown=0, NotChecked=0, Total=6162 [2024-11-27 20:36:13,497 INFO L435 NwaCegarLoop]: 78 mSDtfsCounter, 302 mSDsluCounter, 1423 mSDsCounter, 0 mSdLazyCounter, 1499 mSolverCounterSat, 60 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 15.8s 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, 16.1s IncrementalHoareTripleChecker+Time [2024-11-27 20:36:13,497 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [306 Valid, 1501 Invalid, 1559 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 1499 Invalid, 0 Unknown, 0 Unchecked, 16.1s Time] [2024-11-27 20:36:13,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 259 states. [2024-11-27 20:36:13,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 259 to 127. [2024-11-27 20:36:13,522 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) [2024-11-27 20:36:13,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 192 transitions. [2024-11-27 20:36:13,523 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 192 transitions. Word has length 61 [2024-11-27 20:36:13,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-27 20:36:13,524 INFO L471 AbstractCegarLoop]: Abstraction has 127 states and 192 transitions. [2024-11-27 20:36:13,524 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) [2024-11-27 20:36:13,524 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 192 transitions. [2024-11-27 20:36:13,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2024-11-27 20:36:13,525 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 20:36:13,525 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] [2024-11-27 20:36:13,537 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c49d284e-bc07-42e7-90ac-bbc98e65a8a0/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Ended with exit code 0 [2024-11-27 20:36:13,725 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c49d284e-bc07-42e7-90ac-bbc98e65a8a0/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 20:36:13,725 INFO L396 AbstractCegarLoop]: === Iteration 33 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-27 20:36:13,726 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 20:36:13,726 INFO L85 PathProgramCache]: Analyzing trace with hash 445340997, now seen corresponding path program 2 times [2024-11-27 20:36:13,726 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-27 20:36:13,726 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1903998226] [2024-11-27 20:36:13,726 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-27 20:36:13,726 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 20:36:13,726 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c49d284e-bc07-42e7-90ac-bbc98e65a8a0/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 20:36:13,728 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c49d284e-bc07-42e7-90ac-bbc98e65a8a0/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 20:36:13,729 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c49d284e-bc07-42e7-90ac-bbc98e65a8a0/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2024-11-27 20:36:13,797 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-27 20:36:13,797 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 20:36:13,799 INFO L256 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 18 conjuncts are in the unsatisfiable core [2024-11-27 20:36:13,800 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 20:36:16,795 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 4 proven. 41 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2024-11-27 20:36:16,795 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-27 20:36:23,306 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 4 proven. 41 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2024-11-27 20:36:23,306 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-27 20:36:23,306 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1903998226] [2024-11-27 20:36:23,306 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1903998226] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-27 20:36:23,306 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-27 20:36:23,306 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 28 [2024-11-27 20:36:23,306 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1611921090] [2024-11-27 20:36:23,307 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-27 20:36:23,307 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2024-11-27 20:36:23,307 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-27 20:36:23,307 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2024-11-27 20:36:23,308 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=641, Unknown=0, NotChecked=0, Total=756 [2024-11-27 20:36:23,308 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) [2024-11-27 20:36:44,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 20:36:44,671 INFO L93 Difference]: Finished difference Result 274 states and 407 transitions. [2024-11-27 20:36:44,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2024-11-27 20:36:44,671 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 [2024-11-27 20:36:44,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 20:36:44,673 INFO L225 Difference]: With dead ends: 274 [2024-11-27 20:36:44,673 INFO L226 Difference]: Without dead ends: 259 [2024-11-27 20:36:44,674 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 107 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 409 ImplicationChecksByTransitivity, 15.9s TimeCoverageRelationStatistics Valid=473, Invalid=1977, Unknown=0, NotChecked=0, Total=2450 [2024-11-27 20:36:44,674 INFO L435 NwaCegarLoop]: 72 mSDtfsCounter, 380 mSDsluCounter, 1117 mSDsCounter, 0 mSdLazyCounter, 1235 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 12.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 380 SdHoareTripleChecker+Valid, 1189 SdHoareTripleChecker+Invalid, 1281 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 1235 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 12.7s IncrementalHoareTripleChecker+Time [2024-11-27 20:36:44,674 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [380 Valid, 1189 Invalid, 1281 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 1235 Invalid, 0 Unknown, 0 Unchecked, 12.7s Time] [2024-11-27 20:36:44,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 259 states. [2024-11-27 20:36:44,704 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 259 to 132. [2024-11-27 20:36:44,704 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) [2024-11-27 20:36:44,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 198 transitions. [2024-11-27 20:36:44,705 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 198 transitions. Word has length 64 [2024-11-27 20:36:44,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-27 20:36:44,705 INFO L471 AbstractCegarLoop]: Abstraction has 132 states and 198 transitions. [2024-11-27 20:36:44,705 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) [2024-11-27 20:36:44,705 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 198 transitions. [2024-11-27 20:36:44,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2024-11-27 20:36:44,706 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 20:36:44,707 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] [2024-11-27 20:36:44,716 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c49d284e-bc07-42e7-90ac-bbc98e65a8a0/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Ended with exit code 0 [2024-11-27 20:36:44,907 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c49d284e-bc07-42e7-90ac-bbc98e65a8a0/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 20:36:44,907 INFO L396 AbstractCegarLoop]: === Iteration 34 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-27 20:36:44,907 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 20:36:44,908 INFO L85 PathProgramCache]: Analyzing trace with hash -2070662880, now seen corresponding path program 2 times [2024-11-27 20:36:44,908 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-27 20:36:44,908 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [187217221] [2024-11-27 20:36:44,908 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-27 20:36:44,908 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 20:36:44,908 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c49d284e-bc07-42e7-90ac-bbc98e65a8a0/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 20:36:44,909 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c49d284e-bc07-42e7-90ac-bbc98e65a8a0/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 20:36:44,911 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c49d284e-bc07-42e7-90ac-bbc98e65a8a0/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2024-11-27 20:36:44,984 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-27 20:36:44,984 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 20:36:44,985 INFO L256 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-11-27 20:36:44,987 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 20:36:45,722 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2024-11-27 20:36:45,722 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-27 20:36:46,640 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-27 20:36:46,640 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [187217221] [2024-11-27 20:36:46,640 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [187217221] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-27 20:36:46,640 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [816602248] [2024-11-27 20:36:46,640 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-27 20:36:46,640 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-11-27 20:36:46,641 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c49d284e-bc07-42e7-90ac-bbc98e65a8a0/bin/uautomizer-verify-aQ6SnzHsRB/cvc4 [2024-11-27 20:36:46,652 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c49d284e-bc07-42e7-90ac-bbc98e65a8a0/bin/uautomizer-verify-aQ6SnzHsRB/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2024-11-27 20:36:46,654 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c49d284e-bc07-42e7-90ac-bbc98e65a8a0/bin/uautomizer-verify-aQ6SnzHsRB/cvc4 --incremental --print-success --lang smt (36)] Waiting until timeout for monitored process [2024-11-27 20:36:46,795 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-27 20:36:46,795 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 20:36:46,797 INFO L256 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-11-27 20:36:46,798 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 20:36:49,115 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 27 proven. 30 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-27 20:36:49,115 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-27 20:36:53,049 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 4 proven. 41 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2024-11-27 20:36:53,049 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [816602248] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-27 20:36:53,049 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-27 20:36:53,049 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10, 10] total 24 [2024-11-27 20:36:53,049 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [591197134] [2024-11-27 20:36:53,049 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-27 20:36:53,050 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-11-27 20:36:53,050 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-27 20:36:53,050 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-11-27 20:36:53,051 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=584, Unknown=0, NotChecked=0, Total=702 [2024-11-27 20:36:53,051 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) [2024-11-27 20:37:07,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 20:37:07,441 INFO L93 Difference]: Finished difference Result 294 states and 412 transitions. [2024-11-27 20:37:07,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2024-11-27 20:37:07,442 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 [2024-11-27 20:37:07,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 20:37:07,443 INFO L225 Difference]: With dead ends: 294 [2024-11-27 20:37:07,443 INFO L226 Difference]: Without dead ends: 185 [2024-11-27 20:37:07,444 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 237 GetRequests, 193 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 286 ImplicationChecksByTransitivity, 11.4s TimeCoverageRelationStatistics Valid=432, Invalid=1638, Unknown=0, NotChecked=0, Total=2070 [2024-11-27 20:37:07,444 INFO L435 NwaCegarLoop]: 58 mSDtfsCounter, 285 mSDsluCounter, 768 mSDsCounter, 0 mSdLazyCounter, 934 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.9s 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, 9.1s IncrementalHoareTripleChecker+Time [2024-11-27 20:37:07,444 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [285 Valid, 826 Invalid, 959 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 934 Invalid, 0 Unknown, 0 Unchecked, 9.1s Time] [2024-11-27 20:37:07,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2024-11-27 20:37:07,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 117. [2024-11-27 20:37:07,465 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) [2024-11-27 20:37:07,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 168 transitions. [2024-11-27 20:37:07,466 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 168 transitions. Word has length 66 [2024-11-27 20:37:07,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-27 20:37:07,467 INFO L471 AbstractCegarLoop]: Abstraction has 117 states and 168 transitions. [2024-11-27 20:37:07,467 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) [2024-11-27 20:37:07,467 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 168 transitions. [2024-11-27 20:37:07,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2024-11-27 20:37:07,468 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 20:37:07,468 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] [2024-11-27 20:37:07,479 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c49d284e-bc07-42e7-90ac-bbc98e65a8a0/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Ended with exit code 0 [2024-11-27 20:37:07,670 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c49d284e-bc07-42e7-90ac-bbc98e65a8a0/bin/uautomizer-verify-aQ6SnzHsRB/cvc4 --incremental --print-success --lang smt (36)] Ended with exit code 0 [2024-11-27 20:37:07,868 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c49d284e-bc07-42e7-90ac-bbc98e65a8a0/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c49d284e-bc07-42e7-90ac-bbc98e65a8a0/bin/uautomizer-verify-aQ6SnzHsRB/cvc4 --incremental --print-success --lang smt [2024-11-27 20:37:07,869 INFO L396 AbstractCegarLoop]: === Iteration 35 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-27 20:37:07,869 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 20:37:07,869 INFO L85 PathProgramCache]: Analyzing trace with hash 1716175709, now seen corresponding path program 3 times [2024-11-27 20:37:07,869 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-27 20:37:07,869 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [747904502] [2024-11-27 20:37:07,869 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-27 20:37:07,869 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 20:37:07,870 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c49d284e-bc07-42e7-90ac-bbc98e65a8a0/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 20:37:07,871 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c49d284e-bc07-42e7-90ac-bbc98e65a8a0/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 20:37:07,872 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c49d284e-bc07-42e7-90ac-bbc98e65a8a0/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2024-11-27 20:37:07,976 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 14 check-sat command(s) [2024-11-27 20:37:07,976 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 20:37:07,978 INFO L256 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-11-27 20:37:07,979 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 20:37:10,495 INFO L134 CoverageAnalysis]: Checked inductivity of 131 backedges. 25 proven. 100 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-27 20:37:10,495 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-27 20:37:16,919 INFO L134 CoverageAnalysis]: Checked inductivity of 131 backedges. 4 proven. 109 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2024-11-27 20:37:16,919 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-27 20:37:16,919 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [747904502] [2024-11-27 20:37:16,919 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [747904502] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-27 20:37:16,919 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-27 20:37:16,920 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2024-11-27 20:37:16,920 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2006907894] [2024-11-27 20:37:16,920 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-27 20:37:16,920 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2024-11-27 20:37:16,920 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-27 20:37:16,921 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2024-11-27 20:37:16,921 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=193, Invalid=457, Unknown=0, NotChecked=0, Total=650 [2024-11-27 20:37:16,922 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) [2024-11-27 20:37:30,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 20:37:30,248 INFO L93 Difference]: Finished difference Result 275 states and 397 transitions. [2024-11-27 20:37:30,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2024-11-27 20:37:30,249 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 [2024-11-27 20:37:30,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 20:37:30,250 INFO L225 Difference]: With dead ends: 275 [2024-11-27 20:37:30,250 INFO L226 Difference]: Without dead ends: 166 [2024-11-27 20:37:30,251 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 113 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 13.2s TimeCoverageRelationStatistics Valid=453, Invalid=807, Unknown=0, NotChecked=0, Total=1260 [2024-11-27 20:37:30,252 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 [2024-11-27 20:37:30,252 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] [2024-11-27 20:37:30,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2024-11-27 20:37:30,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 134. [2024-11-27 20:37:30,271 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) [2024-11-27 20:37:30,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 202 transitions. [2024-11-27 20:37:30,272 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 202 transitions. Word has length 69 [2024-11-27 20:37:30,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-27 20:37:30,272 INFO L471 AbstractCegarLoop]: Abstraction has 134 states and 202 transitions. [2024-11-27 20:37:30,273 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) [2024-11-27 20:37:30,273 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 202 transitions. [2024-11-27 20:37:30,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2024-11-27 20:37:30,273 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 20:37:30,273 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] [2024-11-27 20:37:30,286 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c49d284e-bc07-42e7-90ac-bbc98e65a8a0/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Ended with exit code 0 [2024-11-27 20:37:30,474 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c49d284e-bc07-42e7-90ac-bbc98e65a8a0/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 20:37:30,474 INFO L396 AbstractCegarLoop]: === Iteration 36 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-27 20:37:30,474 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 20:37:30,474 INFO L85 PathProgramCache]: Analyzing trace with hash -2032484429, now seen corresponding path program 3 times [2024-11-27 20:37:30,475 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-27 20:37:30,475 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1535644685] [2024-11-27 20:37:30,475 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-27 20:37:30,475 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 20:37:30,475 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c49d284e-bc07-42e7-90ac-bbc98e65a8a0/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 20:37:30,477 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c49d284e-bc07-42e7-90ac-bbc98e65a8a0/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 20:37:30,478 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c49d284e-bc07-42e7-90ac-bbc98e65a8a0/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2024-11-27 20:37:30,606 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 17 check-sat command(s) [2024-11-27 20:37:30,606 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 20:37:30,608 INFO L256 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 27 conjuncts are in the unsatisfiable core [2024-11-27 20:37:30,610 INFO L279 TraceCheckSpWp]: Computing forward predicates...