./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/combinations/square_4+soft_float_1-2a.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_ef5e54c2-064e-4fe1-a295-d132e8d37af5/bin/uautomizer-verify-aQ6SnzHsRB/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef5e54c2-064e-4fe1-a295-d132e8d37af5/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_ef5e54c2-064e-4fe1-a295-d132e8d37af5/bin/uautomizer-verify-aQ6SnzHsRB/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef5e54c2-064e-4fe1-a295-d132e8d37af5/bin/uautomizer-verify-aQ6SnzHsRB/config/AutomizerReach.xml -i ../../sv-benchmarks/c/combinations/square_4+soft_float_1-2a.c.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef5e54c2-064e-4fe1-a295-d132e8d37af5/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_ef5e54c2-064e-4fe1-a295-d132e8d37af5/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 964037bccd5af2bec8208ce0f4b08447d41303350ff91bfe4b13e42b362dc54b --- Real Ultimate output --- This is Ultimate 0.3.0-dev-d790fec [2024-11-27 20:08:30,192 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-27 20:08:30,282 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef5e54c2-064e-4fe1-a295-d132e8d37af5/bin/uautomizer-verify-aQ6SnzHsRB/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-11-27 20:08:30,289 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-27 20:08:30,289 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-27 20:08:30,314 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-27 20:08:30,314 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-27 20:08:30,315 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-27 20:08:30,315 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-27 20:08:30,315 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-27 20:08:30,315 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-27 20:08:30,316 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-27 20:08:30,316 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-27 20:08:30,316 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-27 20:08:30,316 INFO L153 SettingsManager]: * Use SBE=true [2024-11-27 20:08:30,317 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-27 20:08:30,317 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-27 20:08:30,317 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-27 20:08:30,317 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-27 20:08:30,317 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-27 20:08:30,317 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-27 20:08:30,317 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-27 20:08:30,318 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-27 20:08:30,318 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-27 20:08:30,318 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-27 20:08:30,318 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-27 20:08:30,318 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2024-11-27 20:08:30,318 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-27 20:08:30,319 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2024-11-27 20:08:30,319 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-27 20:08:30,319 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-27 20:08:30,319 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-27 20:08:30,319 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-27 20:08:30,319 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-27 20:08:30,320 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-27 20:08:30,320 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-27 20:08:30,320 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-27 20:08:30,320 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-27 20:08:30,320 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-27 20:08:30,320 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-27 20:08:30,321 INFO L153 SettingsManager]: * Compute procedure contracts=false [2024-11-27 20:08:30,321 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-27 20:08:30,321 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-27 20:08:30,321 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-27 20:08:30,321 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-27 20:08:30,321 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-27 20:08:30,321 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-27 20:08:30,321 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-27 20:08:30,321 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_ef5e54c2-064e-4fe1-a295-d132e8d37af5/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 -> 964037bccd5af2bec8208ce0f4b08447d41303350ff91bfe4b13e42b362dc54b [2024-11-27 20:08:30,633 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-27 20:08:30,642 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-27 20:08:30,644 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-27 20:08:30,646 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-27 20:08:30,646 INFO L274 PluginConnector]: CDTParser initialized [2024-11-27 20:08:30,647 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef5e54c2-064e-4fe1-a295-d132e8d37af5/bin/uautomizer-verify-aQ6SnzHsRB/../../sv-benchmarks/c/combinations/square_4+soft_float_1-2a.c.cil.c [2024-11-27 20:08:33,766 INFO L533 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef5e54c2-064e-4fe1-a295-d132e8d37af5/bin/uautomizer-verify-aQ6SnzHsRB/data/17db6dbdc/1387246cb1004a529d629bf3a8ab88d1/FLAGc5f5b9c96 [2024-11-27 20:08:34,026 INFO L384 CDTParser]: Found 1 translation units. [2024-11-27 20:08:34,027 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef5e54c2-064e-4fe1-a295-d132e8d37af5/sv-benchmarks/c/combinations/square_4+soft_float_1-2a.c.cil.c [2024-11-27 20:08:34,037 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef5e54c2-064e-4fe1-a295-d132e8d37af5/bin/uautomizer-verify-aQ6SnzHsRB/data/17db6dbdc/1387246cb1004a529d629bf3a8ab88d1/FLAGc5f5b9c96 [2024-11-27 20:08:34,056 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef5e54c2-064e-4fe1-a295-d132e8d37af5/bin/uautomizer-verify-aQ6SnzHsRB/data/17db6dbdc/1387246cb1004a529d629bf3a8ab88d1 [2024-11-27 20:08:34,059 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-27 20:08:34,061 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-27 20:08:34,062 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-27 20:08:34,063 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-27 20:08:34,068 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-27 20:08:34,069 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.11 08:08:34" (1/1) ... [2024-11-27 20:08:34,070 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6738dc2a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 08:08:34, skipping insertion in model container [2024-11-27 20:08:34,071 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.11 08:08:34" (1/1) ... [2024-11-27 20:08:34,099 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-27 20:08:34,311 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_ef5e54c2-064e-4fe1-a295-d132e8d37af5/sv-benchmarks/c/combinations/square_4+soft_float_1-2a.c.cil.c[1999,2012] [2024-11-27 20:08:34,318 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_ef5e54c2-064e-4fe1-a295-d132e8d37af5/sv-benchmarks/c/combinations/square_4+soft_float_1-2a.c.cil.c[2393,2406] [2024-11-27 20:08:34,396 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-27 20:08:34,408 INFO L200 MainTranslator]: Completed pre-run [2024-11-27 20:08:34,423 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_ef5e54c2-064e-4fe1-a295-d132e8d37af5/sv-benchmarks/c/combinations/square_4+soft_float_1-2a.c.cil.c[1999,2012] [2024-11-27 20:08:34,425 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_ef5e54c2-064e-4fe1-a295-d132e8d37af5/sv-benchmarks/c/combinations/square_4+soft_float_1-2a.c.cil.c[2393,2406] [2024-11-27 20:08:34,471 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-27 20:08:34,490 INFO L204 MainTranslator]: Completed translation [2024-11-27 20:08:34,491 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 08:08:34 WrapperNode [2024-11-27 20:08:34,491 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-27 20:08:34,492 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-27 20:08:34,492 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-27 20:08:34,493 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-27 20:08:34,506 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 08:08:34" (1/1) ... [2024-11-27 20:08:34,517 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 08:08:34" (1/1) ... [2024-11-27 20:08:34,559 INFO L138 Inliner]: procedures = 27, calls = 20, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 211 [2024-11-27 20:08:34,563 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-27 20:08:34,563 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-27 20:08:34,563 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-27 20:08:34,563 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-27 20:08:34,579 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 08:08:34" (1/1) ... [2024-11-27 20:08:34,581 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 08:08:34" (1/1) ... [2024-11-27 20:08:34,584 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 08:08:34" (1/1) ... [2024-11-27 20:08:34,618 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 20:08:34,622 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 08:08:34" (1/1) ... [2024-11-27 20:08:34,623 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 08:08:34" (1/1) ... [2024-11-27 20:08:34,630 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 08:08:34" (1/1) ... [2024-11-27 20:08:34,632 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 08:08:34" (1/1) ... [2024-11-27 20:08:34,637 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 08:08:34" (1/1) ... [2024-11-27 20:08:34,639 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 08:08:34" (1/1) ... [2024-11-27 20:08:34,641 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 08:08:34" (1/1) ... [2024-11-27 20:08:34,644 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-27 20:08:34,645 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-27 20:08:34,645 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-27 20:08:34,645 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-27 20:08:34,650 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 08:08:34" (1/1) ... [2024-11-27 20:08:34,664 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-27 20:08:34,685 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef5e54c2-064e-4fe1-a295-d132e8d37af5/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 20:08:34,703 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef5e54c2-064e-4fe1-a295-d132e8d37af5/bin/uautomizer-verify-aQ6SnzHsRB/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-11-27 20:08:34,709 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef5e54c2-064e-4fe1-a295-d132e8d37af5/bin/uautomizer-verify-aQ6SnzHsRB/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-11-27 20:08:34,743 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-27 20:08:34,743 INFO L130 BoogieDeclarations]: Found specification of procedure base2flt [2024-11-27 20:08:34,744 INFO L138 BoogieDeclarations]: Found implementation of procedure base2flt [2024-11-27 20:08:34,744 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-27 20:08:34,745 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-27 20:08:34,745 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-27 20:08:34,745 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2024-11-27 20:08:34,745 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2024-11-27 20:08:34,836 INFO L234 CfgBuilder]: Building ICFG [2024-11-27 20:08:34,838 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-27 20:08:35,421 INFO L? ?]: Removed 81 outVars from TransFormulas that were not future-live. [2024-11-27 20:08:35,422 INFO L283 CfgBuilder]: Performing block encoding [2024-11-27 20:08:35,437 INFO L307 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-27 20:08:35,438 INFO L312 CfgBuilder]: Removed 4 assume(true) statements. [2024-11-27 20:08:35,438 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.11 08:08:35 BoogieIcfgContainer [2024-11-27 20:08:35,439 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-27 20:08:35,441 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-27 20:08:35,441 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-27 20:08:35,449 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-27 20:08:35,450 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.11 08:08:34" (1/3) ... [2024-11-27 20:08:35,451 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7452f2ca and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.11 08:08:35, skipping insertion in model container [2024-11-27 20:08:35,451 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 08:08:34" (2/3) ... [2024-11-27 20:08:35,451 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7452f2ca and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.11 08:08:35, skipping insertion in model container [2024-11-27 20:08:35,451 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.11 08:08:35" (3/3) ... [2024-11-27 20:08:35,453 INFO L128 eAbstractionObserver]: Analyzing ICFG square_4+soft_float_1-2a.c.cil.c [2024-11-27 20:08:35,472 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-27 20:08:35,474 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG square_4+soft_float_1-2a.c.cil.c that has 3 procedures, 103 locations, 1 initial locations, 2 loop locations, and 2 error locations. [2024-11-27 20:08:35,548 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-27 20:08:35,563 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;@7166c4f7, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-27 20:08:35,563 INFO L334 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2024-11-27 20:08:35,569 INFO L276 IsEmpty]: Start isEmpty. Operand has 103 states, 90 states have (on average 1.5888888888888888) internal successors, (143), 94 states have internal predecessors, (143), 8 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2024-11-27 20:08:35,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2024-11-27 20:08:35,577 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 20:08:35,577 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-11-27 20:08:35,578 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-27 20:08:35,586 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 20:08:35,586 INFO L85 PathProgramCache]: Analyzing trace with hash 1530844763, now seen corresponding path program 1 times [2024-11-27 20:08:35,594 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 20:08:35,595 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [740723722] [2024-11-27 20:08:35,596 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 20:08:35,596 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 20:08:35,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 20:08:35,744 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 20:08:35,744 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 20:08:35,744 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [740723722] [2024-11-27 20:08:35,745 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [740723722] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-27 20:08:35,745 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-27 20:08:35,746 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-27 20:08:35,747 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [506787710] [2024-11-27 20:08:35,748 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-27 20:08:35,752 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-11-27 20:08:35,752 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 20:08:35,772 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-11-27 20:08:35,772 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-11-27 20:08:35,775 INFO L87 Difference]: Start difference. First operand has 103 states, 90 states have (on average 1.5888888888888888) internal successors, (143), 94 states have internal predecessors, (143), 8 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) Second operand has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 20:08:35,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 20:08:35,807 INFO L93 Difference]: Finished difference Result 201 states and 318 transitions. [2024-11-27 20:08:35,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-11-27 20:08:35,809 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 20:08:35,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 20:08:35,822 INFO L225 Difference]: With dead ends: 201 [2024-11-27 20:08:35,822 INFO L226 Difference]: Without dead ends: 96 [2024-11-27 20:08:35,827 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 20:08:35,831 INFO L435 NwaCegarLoop]: 149 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, 149 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 20:08:35,832 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 149 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-27 20:08:35,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2024-11-27 20:08:35,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 96. [2024-11-27 20:08:35,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 84 states have (on average 1.4880952380952381) internal successors, (125), 87 states have internal predecessors, (125), 8 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2024-11-27 20:08:35,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 140 transitions. [2024-11-27 20:08:35,891 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 140 transitions. Word has length 7 [2024-11-27 20:08:35,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-27 20:08:35,892 INFO L471 AbstractCegarLoop]: Abstraction has 96 states and 140 transitions. [2024-11-27 20:08:35,892 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 20:08:35,893 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 140 transitions. [2024-11-27 20:08:35,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2024-11-27 20:08:35,894 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 20:08:35,894 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-11-27 20:08:35,895 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-27 20:08:35,895 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-27 20:08:35,896 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 20:08:35,897 INFO L85 PathProgramCache]: Analyzing trace with hash 1530904345, now seen corresponding path program 1 times [2024-11-27 20:08:35,897 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 20:08:35,897 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2045057062] [2024-11-27 20:08:35,897 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 20:08:35,897 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 20:08:35,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-11-27 20:08:35,929 INFO L357 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-11-27 20:08:35,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-11-27 20:08:35,968 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2024-11-27 20:08:35,968 INFO L340 BasicCegarLoop]: Counterexample is feasible [2024-11-27 20:08:35,970 INFO L782 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (1 of 2 remaining) [2024-11-27 20:08:35,972 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2024-11-27 20:08:35,972 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-27 20:08:35,976 INFO L422 BasicCegarLoop]: Path program histogram: [1, 1] [2024-11-27 20:08:35,991 INFO L170 ceAbstractionStarter]: Computing trace abstraction results [2024-11-27 20:08:35,997 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 27.11 08:08:35 BoogieIcfgContainer [2024-11-27 20:08:35,997 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2024-11-27 20:08:35,998 INFO L112 PluginConnector]: ------------------------Witness Printer---------------------------- [2024-11-27 20:08:35,998 INFO L270 PluginConnector]: Initializing Witness Printer... [2024-11-27 20:08:35,999 INFO L274 PluginConnector]: Witness Printer initialized [2024-11-27 20:08:35,999 INFO L184 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.11 08:08:35" (3/4) ... [2024-11-27 20:08:36,002 INFO L149 WitnessPrinter]: No result that supports witness generation found [2024-11-27 20:08:36,003 INFO L131 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2024-11-27 20:08:36,004 INFO L158 Benchmark]: Toolchain (without parser) took 1943.80ms. Allocated memory is still 117.4MB. Free memory was 91.1MB in the beginning and 78.9MB in the end (delta: 12.2MB). Peak memory consumption was 13.8MB. Max. memory is 16.1GB. [2024-11-27 20:08:36,005 INFO L158 Benchmark]: CDTParser took 0.45ms. Allocated memory is still 83.9MB. Free memory is still 38.4MB. There was no memory consumed. Max. memory is 16.1GB. [2024-11-27 20:08:36,005 INFO L158 Benchmark]: CACSL2BoogieTranslator took 429.42ms. Allocated memory is still 117.4MB. Free memory was 91.1MB in the beginning and 76.3MB in the end (delta: 14.8MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. [2024-11-27 20:08:36,005 INFO L158 Benchmark]: Boogie Procedure Inliner took 70.38ms. Allocated memory is still 117.4MB. Free memory was 76.3MB in the beginning and 74.3MB in the end (delta: 2.0MB). There was no memory consumed. Max. memory is 16.1GB. [2024-11-27 20:08:36,006 INFO L158 Benchmark]: Boogie Preprocessor took 80.81ms. Allocated memory is still 117.4MB. Free memory was 74.3MB in the beginning and 72.2MB in the end (delta: 2.0MB). There was no memory consumed. Max. memory is 16.1GB. [2024-11-27 20:08:36,006 INFO L158 Benchmark]: RCFGBuilder took 793.97ms. Allocated memory is still 117.4MB. Free memory was 72.2MB in the beginning and 48.8MB in the end (delta: 23.5MB). Peak memory consumption was 25.2MB. Max. memory is 16.1GB. [2024-11-27 20:08:36,007 INFO L158 Benchmark]: TraceAbstraction took 556.41ms. Allocated memory is still 117.4MB. Free memory was 47.9MB in the beginning and 78.9MB in the end (delta: -31.0MB). There was no memory consumed. Max. memory is 16.1GB. [2024-11-27 20:08:36,007 INFO L158 Benchmark]: Witness Printer took 5.16ms. Allocated memory is still 117.4MB. Free memory was 78.9MB in the beginning and 78.9MB in the end (delta: 13.7kB). There was no memory consumed. Max. memory is 16.1GB. [2024-11-27 20:08:36,009 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 83.9MB. Free memory is still 38.4MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 429.42ms. Allocated memory is still 117.4MB. Free memory was 91.1MB in the beginning and 76.3MB in the end (delta: 14.8MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 70.38ms. Allocated memory is still 117.4MB. Free memory was 76.3MB in the beginning and 74.3MB in the end (delta: 2.0MB). There was no memory consumed. Max. memory is 16.1GB. * Boogie Preprocessor took 80.81ms. Allocated memory is still 117.4MB. Free memory was 74.3MB in the beginning and 72.2MB in the end (delta: 2.0MB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 793.97ms. Allocated memory is still 117.4MB. Free memory was 72.2MB in the beginning and 48.8MB in the end (delta: 23.5MB). Peak memory consumption was 25.2MB. Max. memory is 16.1GB. * TraceAbstraction took 556.41ms. Allocated memory is still 117.4MB. Free memory was 47.9MB in the beginning and 78.9MB in the end (delta: -31.0MB). There was no memory consumed. Max. memory is 16.1GB. * Witness Printer took 5.16ms. Allocated memory is still 117.4MB. Free memory was 78.9MB in the beginning and 78.9MB in the end (delta: 13.7kB). 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: [L403] COND TRUE __VERIFIER_nondet_int() [L404] CALL main1() [L39] float IN = __VERIFIER_nondet_float(); [L40] CALL assume_abort_if_not(IN >= 0.0f && IN < 1.0f) [L34] COND FALSE !(!cond) [L40] RET assume_abort_if_not(IN >= 0.0f && IN < 1.0f) [L42] float x = IN; [L44-L45] float result = 1.0f + 0.5f*x - 0.125f*x*x + 0.0625f*x*x*x - 0.0390625f*x*x*x*x; [L47] COND TRUE !(result >= 0.0f && result < 1.39844f) [L48] reach_error() - UnprovableResult [Line: 61]: Unable to prove that a call to reach_error is unreachable Unable to prove that a call to reach_error is unreachable Reason: Not analyzed. - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 103 locations, 2 error locations. Started 1 CEGAR loops. OverallTime: 0.5s, OverallIterations: 2, TraceHistogramMax: 1, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 0.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 0 SdHoareTripleChecker+Valid, 0.0s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 0 mSDsluCounter, 149 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, 149 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=103occurred in iteration=0, InterpolantAutomatonStates: 2, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 1 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.1s InterpolantComputationTime, 14 NumberOfCodeBlocks, 14 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 6 ConstructedInterpolants, 0 QuantifiedInterpolants, 6 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 1 InterpolantComputations, 1 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available, ConComCheckerStatistics: No data available RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces [2024-11-27 20:08:36,032 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef5e54c2-064e-4fe1-a295-d132e8d37af5/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_ef5e54c2-064e-4fe1-a295-d132e8d37af5/bin/uautomizer-verify-aQ6SnzHsRB/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef5e54c2-064e-4fe1-a295-d132e8d37af5/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_ef5e54c2-064e-4fe1-a295-d132e8d37af5/bin/uautomizer-verify-aQ6SnzHsRB/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef5e54c2-064e-4fe1-a295-d132e8d37af5/bin/uautomizer-verify-aQ6SnzHsRB/config/AutomizerReach.xml -i ../../sv-benchmarks/c/combinations/square_4+soft_float_1-2a.c.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef5e54c2-064e-4fe1-a295-d132e8d37af5/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_ef5e54c2-064e-4fe1-a295-d132e8d37af5/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 964037bccd5af2bec8208ce0f4b08447d41303350ff91bfe4b13e42b362dc54b --- Real Ultimate output --- This is Ultimate 0.3.0-dev-d790fec [2024-11-27 20:08:39,048 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-27 20:08:39,209 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef5e54c2-064e-4fe1-a295-d132e8d37af5/bin/uautomizer-verify-aQ6SnzHsRB/config/svcomp-Reach-32bit-Automizer_Bitvector.epf [2024-11-27 20:08:39,220 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-27 20:08:39,220 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-27 20:08:39,262 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-27 20:08:39,263 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-27 20:08:39,263 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-27 20:08:39,264 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-27 20:08:39,264 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-27 20:08:39,265 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-27 20:08:39,266 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-27 20:08:39,266 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-27 20:08:39,267 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-27 20:08:39,267 INFO L153 SettingsManager]: * Use SBE=true [2024-11-27 20:08:39,268 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-27 20:08:39,268 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-27 20:08:39,268 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-27 20:08:39,268 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-27 20:08:39,268 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-27 20:08:39,269 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-27 20:08:39,269 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-27 20:08:39,269 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-27 20:08:39,269 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-11-27 20:08:39,269 INFO L153 SettingsManager]: * Use bitvectors instead of ints=true [2024-11-27 20:08:39,269 INFO L153 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2024-11-27 20:08:39,269 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-27 20:08:39,269 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-27 20:08:39,270 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2024-11-27 20:08:39,270 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-27 20:08:39,270 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2024-11-27 20:08:39,271 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-27 20:08:39,271 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-27 20:08:39,271 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-27 20:08:39,271 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-27 20:08:39,271 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-27 20:08:39,272 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-27 20:08:39,272 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-27 20:08:39,272 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-27 20:08:39,272 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-27 20:08:39,273 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-27 20:08:39,273 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-27 20:08:39,273 INFO L153 SettingsManager]: * Compute procedure contracts=false [2024-11-27 20:08:39,273 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-27 20:08:39,273 INFO L153 SettingsManager]: * Trace refinement strategy=FOX [2024-11-27 20:08:39,274 INFO L153 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2024-11-27 20:08:39,274 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-27 20:08:39,274 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-27 20:08:39,274 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-27 20:08:39,274 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-27 20:08:39,274 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_ef5e54c2-064e-4fe1-a295-d132e8d37af5/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 -> 964037bccd5af2bec8208ce0f4b08447d41303350ff91bfe4b13e42b362dc54b [2024-11-27 20:08:39,632 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-27 20:08:39,642 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-27 20:08:39,645 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-27 20:08:39,646 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-27 20:08:39,647 INFO L274 PluginConnector]: CDTParser initialized [2024-11-27 20:08:39,648 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef5e54c2-064e-4fe1-a295-d132e8d37af5/bin/uautomizer-verify-aQ6SnzHsRB/../../sv-benchmarks/c/combinations/square_4+soft_float_1-2a.c.cil.c [2024-11-27 20:08:42,734 INFO L533 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef5e54c2-064e-4fe1-a295-d132e8d37af5/bin/uautomizer-verify-aQ6SnzHsRB/data/d9570a943/ecaaafcd525041269437b752d2dd2bbe/FLAG0d84fbe46 [2024-11-27 20:08:43,075 INFO L384 CDTParser]: Found 1 translation units. [2024-11-27 20:08:43,076 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef5e54c2-064e-4fe1-a295-d132e8d37af5/sv-benchmarks/c/combinations/square_4+soft_float_1-2a.c.cil.c [2024-11-27 20:08:43,092 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef5e54c2-064e-4fe1-a295-d132e8d37af5/bin/uautomizer-verify-aQ6SnzHsRB/data/d9570a943/ecaaafcd525041269437b752d2dd2bbe/FLAG0d84fbe46 [2024-11-27 20:08:43,117 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef5e54c2-064e-4fe1-a295-d132e8d37af5/bin/uautomizer-verify-aQ6SnzHsRB/data/d9570a943/ecaaafcd525041269437b752d2dd2bbe [2024-11-27 20:08:43,120 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-27 20:08:43,123 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-27 20:08:43,126 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-27 20:08:43,126 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-27 20:08:43,133 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-27 20:08:43,134 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.11 08:08:43" (1/1) ... [2024-11-27 20:08:43,137 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3670770a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 08:08:43, skipping insertion in model container [2024-11-27 20:08:43,137 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.11 08:08:43" (1/1) ... [2024-11-27 20:08:43,175 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-27 20:08:43,403 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_ef5e54c2-064e-4fe1-a295-d132e8d37af5/sv-benchmarks/c/combinations/square_4+soft_float_1-2a.c.cil.c[1999,2012] [2024-11-27 20:08:43,413 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_ef5e54c2-064e-4fe1-a295-d132e8d37af5/sv-benchmarks/c/combinations/square_4+soft_float_1-2a.c.cil.c[2393,2406] [2024-11-27 20:08:43,478 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-27 20:08:43,493 INFO L200 MainTranslator]: Completed pre-run [2024-11-27 20:08:43,510 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_ef5e54c2-064e-4fe1-a295-d132e8d37af5/sv-benchmarks/c/combinations/square_4+soft_float_1-2a.c.cil.c[1999,2012] [2024-11-27 20:08:43,512 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_ef5e54c2-064e-4fe1-a295-d132e8d37af5/sv-benchmarks/c/combinations/square_4+soft_float_1-2a.c.cil.c[2393,2406] [2024-11-27 20:08:43,561 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-27 20:08:43,589 INFO L204 MainTranslator]: Completed translation [2024-11-27 20:08:43,589 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 08:08:43 WrapperNode [2024-11-27 20:08:43,589 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-27 20:08:43,591 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-27 20:08:43,591 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-27 20:08:43,591 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-27 20:08:43,603 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 08:08:43" (1/1) ... [2024-11-27 20:08:43,621 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 08:08:43" (1/1) ... [2024-11-27 20:08:43,662 INFO L138 Inliner]: procedures = 28, calls = 20, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 168 [2024-11-27 20:08:43,662 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-27 20:08:43,663 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-27 20:08:43,663 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-27 20:08:43,663 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-27 20:08:43,674 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 08:08:43" (1/1) ... [2024-11-27 20:08:43,674 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 08:08:43" (1/1) ... [2024-11-27 20:08:43,678 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 08:08:43" (1/1) ... [2024-11-27 20:08:43,702 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 20:08:43,702 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 08:08:43" (1/1) ... [2024-11-27 20:08:43,702 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 08:08:43" (1/1) ... [2024-11-27 20:08:43,723 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 08:08:43" (1/1) ... [2024-11-27 20:08:43,724 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 08:08:43" (1/1) ... [2024-11-27 20:08:43,737 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 08:08:43" (1/1) ... [2024-11-27 20:08:43,739 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 08:08:43" (1/1) ... [2024-11-27 20:08:43,745 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 08:08:43" (1/1) ... [2024-11-27 20:08:43,748 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-27 20:08:43,756 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-27 20:08:43,757 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-27 20:08:43,757 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-27 20:08:43,758 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 08:08:43" (1/1) ... [2024-11-27 20:08:43,767 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-27 20:08:43,784 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef5e54c2-064e-4fe1-a295-d132e8d37af5/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 20:08:43,800 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef5e54c2-064e-4fe1-a295-d132e8d37af5/bin/uautomizer-verify-aQ6SnzHsRB/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-11-27 20:08:43,808 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef5e54c2-064e-4fe1-a295-d132e8d37af5/bin/uautomizer-verify-aQ6SnzHsRB/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-11-27 20:08:43,839 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-27 20:08:43,839 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1#0 [2024-11-27 20:08:43,839 INFO L130 BoogieDeclarations]: Found specification of procedure base2flt [2024-11-27 20:08:43,839 INFO L138 BoogieDeclarations]: Found implementation of procedure base2flt [2024-11-27 20:08:43,840 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-27 20:08:43,840 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-27 20:08:43,840 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2024-11-27 20:08:43,840 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2024-11-27 20:08:43,952 INFO L234 CfgBuilder]: Building ICFG [2024-11-27 20:08:43,954 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-27 20:08:48,793 INFO L? ?]: Removed 65 outVars from TransFormulas that were not future-live. [2024-11-27 20:08:48,794 INFO L283 CfgBuilder]: Performing block encoding [2024-11-27 20:08:48,805 INFO L307 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-27 20:08:48,805 INFO L312 CfgBuilder]: Removed 4 assume(true) statements. [2024-11-27 20:08:48,806 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.11 08:08:48 BoogieIcfgContainer [2024-11-27 20:08:48,806 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-27 20:08:48,809 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-27 20:08:48,809 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-27 20:08:48,814 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-27 20:08:48,815 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.11 08:08:43" (1/3) ... [2024-11-27 20:08:48,816 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@19a2052f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.11 08:08:48, skipping insertion in model container [2024-11-27 20:08:48,816 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 08:08:43" (2/3) ... [2024-11-27 20:08:48,817 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@19a2052f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.11 08:08:48, skipping insertion in model container [2024-11-27 20:08:48,817 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.11 08:08:48" (3/3) ... [2024-11-27 20:08:48,819 INFO L128 eAbstractionObserver]: Analyzing ICFG square_4+soft_float_1-2a.c.cil.c [2024-11-27 20:08:48,837 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-27 20:08:48,839 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG square_4+soft_float_1-2a.c.cil.c that has 3 procedures, 79 locations, 1 initial locations, 2 loop locations, and 2 error locations. [2024-11-27 20:08:48,912 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-27 20:08:48,930 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;@407a9d97, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-27 20:08:48,930 INFO L334 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2024-11-27 20:08:48,936 INFO L276 IsEmpty]: Start isEmpty. Operand has 79 states, 66 states have (on average 1.606060606060606) internal successors, (106), 70 states have internal predecessors, (106), 8 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2024-11-27 20:08:48,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2024-11-27 20:08:48,944 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 20:08:48,944 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-11-27 20:08:48,945 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-27 20:08:48,952 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 20:08:48,953 INFO L85 PathProgramCache]: Analyzing trace with hash 78502818, now seen corresponding path program 1 times [2024-11-27 20:08:48,964 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-27 20:08:48,965 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1082050115] [2024-11-27 20:08:48,965 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 20:08:48,965 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 20:08:48,966 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef5e54c2-064e-4fe1-a295-d132e8d37af5/bin/uautomizer-verify-aQ6SnzHsRB/mathsat [2024-11-27 20:08:48,971 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef5e54c2-064e-4fe1-a295-d132e8d37af5/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 20:08:48,974 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef5e54c2-064e-4fe1-a295-d132e8d37af5/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 20:08:49,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 20:08:49,505 INFO L256 TraceCheckSpWp]: Trace formula consists of 20 conjuncts, 1 conjuncts are in the unsatisfiable core [2024-11-27 20:08:49,509 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 20:08:49,528 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 20:08:49,529 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-27 20:08:49,529 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-27 20:08:49,530 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1082050115] [2024-11-27 20:08:49,530 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1082050115] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-27 20:08:49,531 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-27 20:08:49,531 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-27 20:08:49,533 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1383537315] [2024-11-27 20:08:49,534 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-27 20:08:49,538 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-11-27 20:08:49,539 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-27 20:08:49,563 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-11-27 20:08:49,564 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-11-27 20:08:49,567 INFO L87 Difference]: Start difference. First operand has 79 states, 66 states have (on average 1.606060606060606) internal successors, (106), 70 states have internal predecessors, (106), 8 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) Second operand has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 20:08:49,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 20:08:49,609 INFO L93 Difference]: Finished difference Result 153 states and 244 transitions. [2024-11-27 20:08:49,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-11-27 20:08:49,613 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 20:08:49,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 20:08:49,622 INFO L225 Difference]: With dead ends: 153 [2024-11-27 20:08:49,623 INFO L226 Difference]: Without dead ends: 72 [2024-11-27 20:08:49,629 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 20:08:49,634 INFO L435 NwaCegarLoop]: 114 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 114 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-27 20:08:49,636 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 114 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-27 20:08:49,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2024-11-27 20:08:49,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 72. [2024-11-27 20:08:49,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 60 states have (on average 1.5) internal successors, (90), 63 states have internal predecessors, (90), 8 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2024-11-27 20:08:49,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 105 transitions. [2024-11-27 20:08:49,674 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 105 transitions. Word has length 7 [2024-11-27 20:08:49,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-27 20:08:49,675 INFO L471 AbstractCegarLoop]: Abstraction has 72 states and 105 transitions. [2024-11-27 20:08:49,675 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 20:08:49,675 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 105 transitions. [2024-11-27 20:08:49,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2024-11-27 20:08:49,676 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 20:08:49,676 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-11-27 20:08:49,689 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef5e54c2-064e-4fe1-a295-d132e8d37af5/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 20:08:49,876 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef5e54c2-064e-4fe1-a295-d132e8d37af5/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 20:08:49,877 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-27 20:08:49,877 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 20:08:49,878 INFO L85 PathProgramCache]: Analyzing trace with hash 78562400, now seen corresponding path program 1 times [2024-11-27 20:08:49,878 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-27 20:08:49,878 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1884072359] [2024-11-27 20:08:49,878 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 20:08:49,878 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 20:08:49,878 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef5e54c2-064e-4fe1-a295-d132e8d37af5/bin/uautomizer-verify-aQ6SnzHsRB/mathsat [2024-11-27 20:08:49,881 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef5e54c2-064e-4fe1-a295-d132e8d37af5/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 20:08:49,883 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef5e54c2-064e-4fe1-a295-d132e8d37af5/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 20:17:11,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 20:17:11,816 INFO L256 TraceCheckSpWp]: Trace formula consists of 20 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-11-27 20:17:11,819 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 20:17:20,693 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 20:17:28,813 WARN L286 SmtUtils]: Spent 8.12s on a formula simplification that was a NOOP. DAG size: 28 (called from [L 728] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2024-11-27 20:17:37,005 WARN L286 SmtUtils]: Spent 8.19s 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 20:17:41,087 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 20:17:57,443 WARN L286 SmtUtils]: Spent 8.21s on a formula simplification that was a NOOP. DAG size: 3 (called from [L 728] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2024-11-27 20:18:05,665 WARN L286 SmtUtils]: Spent 8.22s on a formula simplification that was a NOOP. DAG size: 5 (called from [L 728] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2024-11-27 20:18:13,775 WARN L286 SmtUtils]: Spent 8.11s on a formula simplification that was a NOOP. DAG size: 30 (called from [L 728] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2024-11-27 20:18:26,052 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 20:18:34,277 WARN L286 SmtUtils]: Spent 8.22s on a formula simplification that was a NOOP. DAG size: 5 (called from [L 728] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2024-11-27 20:18:42,390 WARN L286 SmtUtils]: Spent 8.11s on a formula simplification that was a NOOP. DAG size: 29 (called from [L 728] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2024-11-27 20:18:46,490 WARN L851 $PredicateComparison]: unable to prove that (let ((.cse0 ((_ to_fp 8 24) roundNearestTiesToEven 1.0)) (.cse1 ((_ to_fp 8 24) roundNearestTiesToEven (/ 1.0 2.0))) (.cse2 ((_ to_fp 8 24) roundNearestTiesToEven (/ 1.0 8.0))) (.cse3 ((_ to_fp 8 24) roundNearestTiesToEven (/ 1.0 16.0))) (.cse4 ((_ to_fp 8 24) roundNearestTiesToEven (/ 5.0 128.0)))) (or (exists ((|v_ULTIMATE.start_main1_~IN~0#1_5| (_ FloatingPoint 8 24))) (and (fp.geq |v_ULTIMATE.start_main1_~IN~0#1_5| (_ +zero 8 24)) (fp.lt |v_ULTIMATE.start_main1_~IN~0#1_5| .cse0) (not (fp.lt (fp.sub roundNearestTiesToEven (fp.add roundNearestTiesToEven (fp.sub roundNearestTiesToEven (fp.add roundNearestTiesToEven .cse0 (fp.mul roundNearestTiesToEven .cse1 |v_ULTIMATE.start_main1_~IN~0#1_5|)) (fp.mul roundNearestTiesToEven (fp.mul roundNearestTiesToEven .cse2 |v_ULTIMATE.start_main1_~IN~0#1_5|) |v_ULTIMATE.start_main1_~IN~0#1_5|)) (fp.mul roundNearestTiesToEven (fp.mul roundNearestTiesToEven (fp.mul roundNearestTiesToEven .cse3 |v_ULTIMATE.start_main1_~IN~0#1_5|) |v_ULTIMATE.start_main1_~IN~0#1_5|) |v_ULTIMATE.start_main1_~IN~0#1_5|)) (fp.mul roundNearestTiesToEven (fp.mul roundNearestTiesToEven (fp.mul roundNearestTiesToEven (fp.mul roundNearestTiesToEven .cse4 |v_ULTIMATE.start_main1_~IN~0#1_5|) |v_ULTIMATE.start_main1_~IN~0#1_5|) |v_ULTIMATE.start_main1_~IN~0#1_5|) |v_ULTIMATE.start_main1_~IN~0#1_5|)) ((_ to_fp 8 24) roundNearestTiesToEven (/ 34961.0 25000.0)))))) (exists ((|v_ULTIMATE.start_main1_~IN~0#1_5| (_ FloatingPoint 8 24))) (and (fp.geq |v_ULTIMATE.start_main1_~IN~0#1_5| (_ +zero 8 24)) (fp.lt |v_ULTIMATE.start_main1_~IN~0#1_5| .cse0) (not (fp.geq (fp.sub roundNearestTiesToEven (fp.add roundNearestTiesToEven (fp.sub roundNearestTiesToEven (fp.add roundNearestTiesToEven .cse0 (fp.mul roundNearestTiesToEven .cse1 |v_ULTIMATE.start_main1_~IN~0#1_5|)) (fp.mul roundNearestTiesToEven (fp.mul roundNearestTiesToEven .cse2 |v_ULTIMATE.start_main1_~IN~0#1_5|) |v_ULTIMATE.start_main1_~IN~0#1_5|)) (fp.mul roundNearestTiesToEven (fp.mul roundNearestTiesToEven (fp.mul roundNearestTiesToEven .cse3 |v_ULTIMATE.start_main1_~IN~0#1_5|) |v_ULTIMATE.start_main1_~IN~0#1_5|) |v_ULTIMATE.start_main1_~IN~0#1_5|)) (fp.mul roundNearestTiesToEven (fp.mul roundNearestTiesToEven (fp.mul roundNearestTiesToEven (fp.mul roundNearestTiesToEven .cse4 |v_ULTIMATE.start_main1_~IN~0#1_5|) |v_ULTIMATE.start_main1_~IN~0#1_5|) |v_ULTIMATE.start_main1_~IN~0#1_5|) |v_ULTIMATE.start_main1_~IN~0#1_5|)) (_ +zero 8 24))))))) is different from false [2024-11-27 20:18:50,533 WARN L873 $PredicateComparison]: unable to prove that (let ((.cse0 ((_ to_fp 8 24) roundNearestTiesToEven 1.0)) (.cse1 ((_ to_fp 8 24) roundNearestTiesToEven (/ 1.0 2.0))) (.cse2 ((_ to_fp 8 24) roundNearestTiesToEven (/ 1.0 8.0))) (.cse3 ((_ to_fp 8 24) roundNearestTiesToEven (/ 1.0 16.0))) (.cse4 ((_ to_fp 8 24) roundNearestTiesToEven (/ 5.0 128.0)))) (or (exists ((|v_ULTIMATE.start_main1_~IN~0#1_5| (_ FloatingPoint 8 24))) (and (fp.geq |v_ULTIMATE.start_main1_~IN~0#1_5| (_ +zero 8 24)) (fp.lt |v_ULTIMATE.start_main1_~IN~0#1_5| .cse0) (not (fp.lt (fp.sub roundNearestTiesToEven (fp.add roundNearestTiesToEven (fp.sub roundNearestTiesToEven (fp.add roundNearestTiesToEven .cse0 (fp.mul roundNearestTiesToEven .cse1 |v_ULTIMATE.start_main1_~IN~0#1_5|)) (fp.mul roundNearestTiesToEven (fp.mul roundNearestTiesToEven .cse2 |v_ULTIMATE.start_main1_~IN~0#1_5|) |v_ULTIMATE.start_main1_~IN~0#1_5|)) (fp.mul roundNearestTiesToEven (fp.mul roundNearestTiesToEven (fp.mul roundNearestTiesToEven .cse3 |v_ULTIMATE.start_main1_~IN~0#1_5|) |v_ULTIMATE.start_main1_~IN~0#1_5|) |v_ULTIMATE.start_main1_~IN~0#1_5|)) (fp.mul roundNearestTiesToEven (fp.mul roundNearestTiesToEven (fp.mul roundNearestTiesToEven (fp.mul roundNearestTiesToEven .cse4 |v_ULTIMATE.start_main1_~IN~0#1_5|) |v_ULTIMATE.start_main1_~IN~0#1_5|) |v_ULTIMATE.start_main1_~IN~0#1_5|) |v_ULTIMATE.start_main1_~IN~0#1_5|)) ((_ to_fp 8 24) roundNearestTiesToEven (/ 34961.0 25000.0)))))) (exists ((|v_ULTIMATE.start_main1_~IN~0#1_5| (_ FloatingPoint 8 24))) (and (fp.geq |v_ULTIMATE.start_main1_~IN~0#1_5| (_ +zero 8 24)) (fp.lt |v_ULTIMATE.start_main1_~IN~0#1_5| .cse0) (not (fp.geq (fp.sub roundNearestTiesToEven (fp.add roundNearestTiesToEven (fp.sub roundNearestTiesToEven (fp.add roundNearestTiesToEven .cse0 (fp.mul roundNearestTiesToEven .cse1 |v_ULTIMATE.start_main1_~IN~0#1_5|)) (fp.mul roundNearestTiesToEven (fp.mul roundNearestTiesToEven .cse2 |v_ULTIMATE.start_main1_~IN~0#1_5|) |v_ULTIMATE.start_main1_~IN~0#1_5|)) (fp.mul roundNearestTiesToEven (fp.mul roundNearestTiesToEven (fp.mul roundNearestTiesToEven .cse3 |v_ULTIMATE.start_main1_~IN~0#1_5|) |v_ULTIMATE.start_main1_~IN~0#1_5|) |v_ULTIMATE.start_main1_~IN~0#1_5|)) (fp.mul roundNearestTiesToEven (fp.mul roundNearestTiesToEven (fp.mul roundNearestTiesToEven (fp.mul roundNearestTiesToEven .cse4 |v_ULTIMATE.start_main1_~IN~0#1_5|) |v_ULTIMATE.start_main1_~IN~0#1_5|) |v_ULTIMATE.start_main1_~IN~0#1_5|) |v_ULTIMATE.start_main1_~IN~0#1_5|)) (_ +zero 8 24))))))) is different from true [2024-11-27 20:18:50,533 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 20:18:50,533 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-27 20:18:50,533 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-27 20:18:50,533 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1884072359] [2024-11-27 20:18:50,534 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1884072359] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-27 20:18:50,534 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-27 20:18:50,534 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-27 20:18:50,534 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1336405299] [2024-11-27 20:18:50,534 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-27 20:18:50,535 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-27 20:18:50,535 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-27 20:18:50,536 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-27 20:18:50,536 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=12, Unknown=3, NotChecked=14, Total=42 [2024-11-27 20:18:50,536 INFO L87 Difference]: Start difference. First operand 72 states and 105 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 20:18:54,831 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.17s for a HTC check with result UNKNOWN. Formula has sorts [Bool, FloatingPoint, RoundingMode, Real], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-11-27 20:18:58,834 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, FloatingPoint, RoundingMode, Real, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-11-27 20:19:02,838 WARN L539 Checker$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 20:19:03,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 20:19:03,285 INFO L93 Difference]: Finished difference Result 72 states and 105 transitions. [2024-11-27 20:19:03,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-27 20:19:03,286 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 20:19:03,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 20:19:03,287 INFO L225 Difference]: With dead ends: 72 [2024-11-27 20:19:03,287 INFO L226 Difference]: Without dead ends: 67 [2024-11-27 20:19:03,287 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 20:19:03,288 INFO L435 NwaCegarLoop]: 100 mSDtfsCounter, 99 mSDsluCounter, 168 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 0 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 12.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 99 SdHoareTripleChecker+Valid, 268 SdHoareTripleChecker+Invalid, 249 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 210 IncrementalHoareTripleChecker+Unchecked, 12.7s IncrementalHoareTripleChecker+Time [2024-11-27 20:19:03,289 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [99 Valid, 268 Invalid, 249 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 36 Invalid, 3 Unknown, 210 Unchecked, 12.7s Time] [2024-11-27 20:19:03,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2024-11-27 20:19:03,296 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 67. [2024-11-27 20:19:03,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 56 states have (on average 1.5178571428571428) internal successors, (85), 58 states have internal predecessors, (85), 8 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2024-11-27 20:19:03,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 100 transitions. [2024-11-27 20:19:03,298 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 100 transitions. Word has length 7 [2024-11-27 20:19:03,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-27 20:19:03,299 INFO L471 AbstractCegarLoop]: Abstraction has 67 states and 100 transitions. [2024-11-27 20:19:03,299 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 20:19:03,299 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 100 transitions. [2024-11-27 20:19:03,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2024-11-27 20:19:03,300 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 20:19:03,300 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 20:19:03,343 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef5e54c2-064e-4fe1-a295-d132e8d37af5/bin/uautomizer-verify-aQ6SnzHsRB/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Ended with exit code 0 [2024-11-27 20:19:03,501 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef5e54c2-064e-4fe1-a295-d132e8d37af5/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 20:19:03,501 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-27 20:19:03,501 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 20:19:03,502 INFO L85 PathProgramCache]: Analyzing trace with hash -531498825, now seen corresponding path program 1 times [2024-11-27 20:19:03,502 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-27 20:19:03,502 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [707512374] [2024-11-27 20:19:03,502 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 20:19:03,502 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 20:19:03,502 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef5e54c2-064e-4fe1-a295-d132e8d37af5/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 20:19:03,504 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef5e54c2-064e-4fe1-a295-d132e8d37af5/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 20:19:03,533 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef5e54c2-064e-4fe1-a295-d132e8d37af5/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-27 20:19:03,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 20:19:03,619 INFO L256 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-11-27 20:19:03,623 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 20:19:04,426 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-27 20:19:04,426 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-27 20:19:04,975 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-27 20:19:04,975 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-27 20:19:04,976 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [707512374] [2024-11-27 20:19:04,976 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [707512374] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-27 20:19:04,976 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-27 20:19:04,976 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2024-11-27 20:19:04,976 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1680792340] [2024-11-27 20:19:04,976 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-27 20:19:04,976 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-27 20:19:04,976 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-27 20:19:04,977 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-27 20:19:04,978 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2024-11-27 20:19:04,978 INFO L87 Difference]: Start difference. First operand 67 states and 100 transitions. Second operand has 8 states, 8 states have (on average 2.625) internal successors, (21), 7 states have internal predecessors, (21), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-11-27 20:19:06,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 20:19:06,618 INFO L93 Difference]: Finished difference Result 144 states and 222 transitions. [2024-11-27 20:19:06,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-27 20:19:06,619 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.625) internal successors, (21), 7 states have internal predecessors, (21), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 33 [2024-11-27 20:19:06,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 20:19:06,622 INFO L225 Difference]: With dead ends: 144 [2024-11-27 20:19:06,622 INFO L226 Difference]: Without dead ends: 99 [2024-11-27 20:19:06,623 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2024-11-27 20:19:06,623 INFO L435 NwaCegarLoop]: 85 mSDtfsCounter, 31 mSDsluCounter, 498 mSDsCounter, 0 mSdLazyCounter, 121 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 583 SdHoareTripleChecker+Invalid, 126 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 121 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2024-11-27 20:19:06,624 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [33 Valid, 583 Invalid, 126 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 121 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2024-11-27 20:19:06,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2024-11-27 20:19:06,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 97. [2024-11-27 20:19:06,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 82 states have (on average 1.475609756097561) internal successors, (121), 85 states have internal predecessors, (121), 11 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (14), 11 states have call predecessors, (14), 10 states have call successors, (14) [2024-11-27 20:19:06,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 146 transitions. [2024-11-27 20:19:06,638 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 146 transitions. Word has length 33 [2024-11-27 20:19:06,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-27 20:19:06,639 INFO L471 AbstractCegarLoop]: Abstraction has 97 states and 146 transitions. [2024-11-27 20:19:06,639 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.625) internal successors, (21), 7 states have internal predecessors, (21), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-11-27 20:19:06,639 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 146 transitions. [2024-11-27 20:19:06,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2024-11-27 20:19:06,640 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 20:19:06,641 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 20:19:06,647 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef5e54c2-064e-4fe1-a295-d132e8d37af5/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-11-27 20:19:06,841 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef5e54c2-064e-4fe1-a295-d132e8d37af5/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 20:19:06,841 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-27 20:19:06,842 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 20:19:06,842 INFO L85 PathProgramCache]: Analyzing trace with hash 1740441323, now seen corresponding path program 1 times [2024-11-27 20:19:06,842 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-27 20:19:06,842 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [286661161] [2024-11-27 20:19:06,843 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 20:19:06,843 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 20:19:06,843 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef5e54c2-064e-4fe1-a295-d132e8d37af5/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 20:19:06,844 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef5e54c2-064e-4fe1-a295-d132e8d37af5/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 20:19:06,846 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef5e54c2-064e-4fe1-a295-d132e8d37af5/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-27 20:19:06,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 20:19:06,915 INFO L256 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-11-27 20:19:06,917 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 20:19:08,195 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-27 20:19:08,195 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-27 20:19:09,006 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-27 20:19:09,006 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-27 20:19:09,006 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [286661161] [2024-11-27 20:19:09,006 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [286661161] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-27 20:19:09,007 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-27 20:19:09,007 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 6] total 12 [2024-11-27 20:19:09,007 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1673359892] [2024-11-27 20:19:09,007 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-27 20:19:09,007 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-11-27 20:19:09,008 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-27 20:19:09,008 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-11-27 20:19:09,009 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2024-11-27 20:19:09,009 INFO L87 Difference]: Start difference. First operand 97 states and 146 transitions. Second operand has 12 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 9 states have internal predecessors, (31), 5 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) [2024-11-27 20:19:12,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 20:19:12,012 INFO L93 Difference]: Finished difference Result 229 states and 364 transitions. [2024-11-27 20:19:12,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-11-27 20:19:12,014 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 9 states have internal predecessors, (31), 5 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) Word has length 36 [2024-11-27 20:19:12,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 20:19:12,017 INFO L225 Difference]: With dead ends: 229 [2024-11-27 20:19:12,021 INFO L226 Difference]: Without dead ends: 163 [2024-11-27 20:19:12,022 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2024-11-27 20:19:12,023 INFO L435 NwaCegarLoop]: 147 mSDtfsCounter, 58 mSDsluCounter, 1056 mSDsCounter, 0 mSdLazyCounter, 312 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 1203 SdHoareTripleChecker+Invalid, 323 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 312 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.0s IncrementalHoareTripleChecker+Time [2024-11-27 20:19:12,023 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [67 Valid, 1203 Invalid, 323 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 312 Invalid, 0 Unknown, 0 Unchecked, 3.0s Time] [2024-11-27 20:19:12,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2024-11-27 20:19:12,051 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 125. [2024-11-27 20:19:12,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125 states, 104 states have (on average 1.3846153846153846) internal successors, (144), 104 states have internal predecessors, (144), 16 states have call successors, (16), 2 states have call predecessors, (16), 4 states have return successors, (33), 20 states have call predecessors, (33), 15 states have call successors, (33) [2024-11-27 20:19:12,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 193 transitions. [2024-11-27 20:19:12,058 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 193 transitions. Word has length 36 [2024-11-27 20:19:12,059 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-27 20:19:12,059 INFO L471 AbstractCegarLoop]: Abstraction has 125 states and 193 transitions. [2024-11-27 20:19:12,059 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 9 states have internal predecessors, (31), 5 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) [2024-11-27 20:19:12,059 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 193 transitions. [2024-11-27 20:19:12,061 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2024-11-27 20:19:12,061 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 20:19:12,061 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 20:19:12,071 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef5e54c2-064e-4fe1-a295-d132e8d37af5/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-11-27 20:19:12,261 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef5e54c2-064e-4fe1-a295-d132e8d37af5/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 20:19:12,262 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-27 20:19:12,262 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 20:19:12,262 INFO L85 PathProgramCache]: Analyzing trace with hash 748537497, now seen corresponding path program 1 times [2024-11-27 20:19:12,262 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-27 20:19:12,262 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [708277176] [2024-11-27 20:19:12,263 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 20:19:12,263 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 20:19:12,263 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef5e54c2-064e-4fe1-a295-d132e8d37af5/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 20:19:12,264 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef5e54c2-064e-4fe1-a295-d132e8d37af5/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 20:19:12,265 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef5e54c2-064e-4fe1-a295-d132e8d37af5/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-27 20:19:12,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 20:19:12,324 INFO L256 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-11-27 20:19:12,326 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 20:19:12,571 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-27 20:19:12,572 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-27 20:19:12,572 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-27 20:19:12,572 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [708277176] [2024-11-27 20:19:12,572 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [708277176] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-27 20:19:12,572 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-27 20:19:12,572 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-27 20:19:12,572 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1200800565] [2024-11-27 20:19:12,573 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-27 20:19:12,573 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-27 20:19:12,573 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-27 20:19:12,574 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-27 20:19:12,574 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-27 20:19:12,575 INFO L87 Difference]: Start difference. First operand 125 states and 193 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, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2024-11-27 20:19:12,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 20:19:12,965 INFO L93 Difference]: Finished difference Result 239 states and 370 transitions. [2024-11-27 20:19:12,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-27 20:19:12,965 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, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) Word has length 39 [2024-11-27 20:19:12,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 20:19:12,967 INFO L225 Difference]: With dead ends: 239 [2024-11-27 20:19:12,967 INFO L226 Difference]: Without dead ends: 118 [2024-11-27 20:19:12,968 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 36 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 20:19:12,969 INFO L435 NwaCegarLoop]: 91 mSDtfsCounter, 22 mSDsluCounter, 166 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 257 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-27 20:19:12,969 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 257 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-27 20:19:12,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2024-11-27 20:19:12,982 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 108. [2024-11-27 20:19:12,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 90 states have (on average 1.3888888888888888) internal successors, (125), 94 states have internal predecessors, (125), 12 states have call successors, (12), 2 states have call predecessors, (12), 5 states have return successors, (23), 13 states have call predecessors, (23), 11 states have call successors, (23) [2024-11-27 20:19:12,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 160 transitions. [2024-11-27 20:19:12,984 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 160 transitions. Word has length 39 [2024-11-27 20:19:12,984 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-27 20:19:12,985 INFO L471 AbstractCegarLoop]: Abstraction has 108 states and 160 transitions. [2024-11-27 20:19:12,985 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, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2024-11-27 20:19:12,985 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 160 transitions. [2024-11-27 20:19:12,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2024-11-27 20:19:12,986 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 20:19:12,987 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 20:19:12,996 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef5e54c2-064e-4fe1-a295-d132e8d37af5/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2024-11-27 20:19:13,190 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef5e54c2-064e-4fe1-a295-d132e8d37af5/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 20:19:13,191 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-27 20:19:13,191 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 20:19:13,191 INFO L85 PathProgramCache]: Analyzing trace with hash -1688699891, now seen corresponding path program 1 times [2024-11-27 20:19:13,191 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-27 20:19:13,192 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2013661713] [2024-11-27 20:19:13,192 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 20:19:13,192 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 20:19:13,192 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef5e54c2-064e-4fe1-a295-d132e8d37af5/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 20:19:13,193 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef5e54c2-064e-4fe1-a295-d132e8d37af5/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 20:19:13,195 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef5e54c2-064e-4fe1-a295-d132e8d37af5/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-27 20:19:13,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 20:19:13,262 INFO L256 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 13 conjuncts are in the unsatisfiable core [2024-11-27 20:19:13,264 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 20:19:15,073 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-27 20:19:15,074 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-27 20:19:16,139 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-27 20:19:16,139 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-27 20:19:16,139 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2013661713] [2024-11-27 20:19:16,139 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2013661713] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-27 20:19:16,139 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-27 20:19:16,139 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [11] total 14 [2024-11-27 20:19:16,140 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [39071524] [2024-11-27 20:19:16,140 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-27 20:19:16,140 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-27 20:19:16,140 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-27 20:19:16,141 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-27 20:19:16,141 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2024-11-27 20:19:16,141 INFO L87 Difference]: Start difference. First operand 108 states and 160 transitions. Second operand has 7 states, 7 states have (on average 4.142857142857143) internal successors, (29), 6 states have internal predecessors, (29), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2024-11-27 20:19:17,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 20:19:17,999 INFO L93 Difference]: Finished difference Result 226 states and 336 transitions. [2024-11-27 20:19:18,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-27 20:19:18,001 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.142857142857143) internal successors, (29), 6 states have internal predecessors, (29), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 40 [2024-11-27 20:19:18,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 20:19:18,003 INFO L225 Difference]: With dead ends: 226 [2024-11-27 20:19:18,003 INFO L226 Difference]: Without dead ends: 171 [2024-11-27 20:19:18,004 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2024-11-27 20:19:18,005 INFO L435 NwaCegarLoop]: 74 mSDtfsCounter, 37 mSDsluCounter, 351 mSDsCounter, 0 mSdLazyCounter, 159 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 425 SdHoareTripleChecker+Invalid, 162 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 159 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2024-11-27 20:19:18,005 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [41 Valid, 425 Invalid, 162 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 159 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2024-11-27 20:19:18,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2024-11-27 20:19:18,021 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 129. [2024-11-27 20:19:18,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129 states, 111 states have (on average 1.3423423423423424) internal successors, (149), 112 states have internal predecessors, (149), 12 states have call successors, (12), 2 states have call predecessors, (12), 5 states have return successors, (23), 16 states have call predecessors, (23), 11 states have call successors, (23) [2024-11-27 20:19:18,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 184 transitions. [2024-11-27 20:19:18,024 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 184 transitions. Word has length 40 [2024-11-27 20:19:18,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-27 20:19:18,025 INFO L471 AbstractCegarLoop]: Abstraction has 129 states and 184 transitions. [2024-11-27 20:19:18,025 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.142857142857143) internal successors, (29), 6 states have internal predecessors, (29), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2024-11-27 20:19:18,025 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 184 transitions. [2024-11-27 20:19:18,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2024-11-27 20:19:18,027 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 20:19:18,027 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 20:19:18,038 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef5e54c2-064e-4fe1-a295-d132e8d37af5/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-11-27 20:19:18,227 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef5e54c2-064e-4fe1-a295-d132e8d37af5/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 20:19:18,228 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-27 20:19:18,228 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 20:19:18,228 INFO L85 PathProgramCache]: Analyzing trace with hash -1631441589, now seen corresponding path program 1 times [2024-11-27 20:19:18,228 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-27 20:19:18,228 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [482719504] [2024-11-27 20:19:18,228 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 20:19:18,229 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 20:19:18,229 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef5e54c2-064e-4fe1-a295-d132e8d37af5/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 20:19:18,230 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef5e54c2-064e-4fe1-a295-d132e8d37af5/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 20:19:18,231 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef5e54c2-064e-4fe1-a295-d132e8d37af5/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-27 20:19:18,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 20:19:18,290 INFO L256 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-11-27 20:19:18,292 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 20:19:18,951 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-27 20:19:18,952 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-27 20:19:18,952 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-27 20:19:18,952 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [482719504] [2024-11-27 20:19:18,952 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [482719504] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-27 20:19:18,952 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-27 20:19:18,952 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-11-27 20:19:18,953 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1779745517] [2024-11-27 20:19:18,953 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-27 20:19:18,953 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-27 20:19:18,953 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-27 20:19:18,954 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-27 20:19:18,954 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2024-11-27 20:19:18,955 INFO L87 Difference]: Start difference. First operand 129 states and 184 transitions. Second operand has 7 states, 7 states have (on average 4.142857142857143) internal successors, (29), 6 states have internal predecessors, (29), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2024-11-27 20:19:19,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 20:19:19,918 INFO L93 Difference]: Finished difference Result 228 states and 334 transitions. [2024-11-27 20:19:19,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-27 20:19:19,919 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.142857142857143) internal successors, (29), 6 states have internal predecessors, (29), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 40 [2024-11-27 20:19:19,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 20:19:19,921 INFO L225 Difference]: With dead ends: 228 [2024-11-27 20:19:19,921 INFO L226 Difference]: Without dead ends: 167 [2024-11-27 20:19:19,922 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-11-27 20:19:19,922 INFO L435 NwaCegarLoop]: 85 mSDtfsCounter, 30 mSDsluCounter, 414 mSDsCounter, 0 mSdLazyCounter, 87 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 499 SdHoareTripleChecker+Invalid, 91 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 87 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2024-11-27 20:19:19,923 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [32 Valid, 499 Invalid, 91 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 87 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2024-11-27 20:19:19,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2024-11-27 20:19:19,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 165. [2024-11-27 20:19:19,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 165 states, 143 states have (on average 1.3496503496503496) internal successors, (193), 146 states have internal predecessors, (193), 16 states have call successors, (16), 2 states have call predecessors, (16), 5 states have return successors, (27), 20 states have call predecessors, (27), 15 states have call successors, (27) [2024-11-27 20:19:19,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 236 transitions. [2024-11-27 20:19:19,938 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 236 transitions. Word has length 40 [2024-11-27 20:19:19,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-27 20:19:19,939 INFO L471 AbstractCegarLoop]: Abstraction has 165 states and 236 transitions. [2024-11-27 20:19:19,939 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.142857142857143) internal successors, (29), 6 states have internal predecessors, (29), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2024-11-27 20:19:19,939 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 236 transitions. [2024-11-27 20:19:19,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2024-11-27 20:19:19,940 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 20:19:19,941 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 20:19:19,950 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef5e54c2-064e-4fe1-a295-d132e8d37af5/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-11-27 20:19:20,141 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef5e54c2-064e-4fe1-a295-d132e8d37af5/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 20:19:20,141 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-27 20:19:20,142 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 20:19:20,142 INFO L85 PathProgramCache]: Analyzing trace with hash 923141631, now seen corresponding path program 2 times [2024-11-27 20:19:20,142 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-27 20:19:20,142 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2079953327] [2024-11-27 20:19:20,142 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-27 20:19:20,142 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 20:19:20,142 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef5e54c2-064e-4fe1-a295-d132e8d37af5/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 20:19:20,144 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef5e54c2-064e-4fe1-a295-d132e8d37af5/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 20:19:20,145 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef5e54c2-064e-4fe1-a295-d132e8d37af5/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-27 20:19:20,197 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-11-27 20:19:20,197 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 20:19:20,199 INFO L256 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-27 20:19:20,201 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 20:19:20,921 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-27 20:19:20,922 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-27 20:19:20,922 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-27 20:19:20,922 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2079953327] [2024-11-27 20:19:20,922 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2079953327] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-27 20:19:20,922 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-27 20:19:20,922 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-11-27 20:19:20,923 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [811653924] [2024-11-27 20:19:20,923 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-27 20:19:20,923 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-27 20:19:20,923 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-27 20:19:20,924 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-27 20:19:20,924 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2024-11-27 20:19:20,924 INFO L87 Difference]: Start difference. First operand 165 states and 236 transitions. Second operand has 7 states, 7 states have (on average 4.142857142857143) internal successors, (29), 6 states have internal predecessors, (29), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2024-11-27 20:19:22,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 20:19:22,237 INFO L93 Difference]: Finished difference Result 283 states and 411 transitions. [2024-11-27 20:19:22,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-27 20:19:22,238 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.142857142857143) internal successors, (29), 6 states have internal predecessors, (29), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 43 [2024-11-27 20:19:22,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 20:19:22,240 INFO L225 Difference]: With dead ends: 283 [2024-11-27 20:19:22,240 INFO L226 Difference]: Without dead ends: 236 [2024-11-27 20:19:22,240 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2024-11-27 20:19:22,241 INFO L435 NwaCegarLoop]: 145 mSDtfsCounter, 47 mSDsluCounter, 636 mSDsCounter, 0 mSdLazyCounter, 114 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 781 SdHoareTripleChecker+Invalid, 116 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 114 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2024-11-27 20:19:22,242 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [51 Valid, 781 Invalid, 116 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 114 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2024-11-27 20:19:22,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 236 states. [2024-11-27 20:19:22,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 236 to 235. [2024-11-27 20:19:22,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 235 states, 207 states have (on average 1.357487922705314) internal successors, (281), 209 states have internal predecessors, (281), 22 states have call successors, (22), 2 states have call predecessors, (22), 5 states have return successors, (33), 29 states have call predecessors, (33), 21 states have call successors, (33) [2024-11-27 20:19:22,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 235 states to 235 states and 336 transitions. [2024-11-27 20:19:22,271 INFO L78 Accepts]: Start accepts. Automaton has 235 states and 336 transitions. Word has length 43 [2024-11-27 20:19:22,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-27 20:19:22,272 INFO L471 AbstractCegarLoop]: Abstraction has 235 states and 336 transitions. [2024-11-27 20:19:22,272 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.142857142857143) internal successors, (29), 6 states have internal predecessors, (29), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2024-11-27 20:19:22,272 INFO L276 IsEmpty]: Start isEmpty. Operand 235 states and 336 transitions. [2024-11-27 20:19:22,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2024-11-27 20:19:22,274 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 20:19:22,274 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 20:19:22,285 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef5e54c2-064e-4fe1-a295-d132e8d37af5/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-11-27 20:19:22,475 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef5e54c2-064e-4fe1-a295-d132e8d37af5/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 20:19:22,475 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-27 20:19:22,475 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 20:19:22,476 INFO L85 PathProgramCache]: Analyzing trace with hash 243083261, now seen corresponding path program 1 times [2024-11-27 20:19:22,476 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-27 20:19:22,476 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1554526962] [2024-11-27 20:19:22,476 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 20:19:22,476 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 20:19:22,476 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef5e54c2-064e-4fe1-a295-d132e8d37af5/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 20:19:22,478 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef5e54c2-064e-4fe1-a295-d132e8d37af5/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 20:19:22,479 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef5e54c2-064e-4fe1-a295-d132e8d37af5/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-11-27 20:19:22,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 20:19:22,532 INFO L256 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-11-27 20:19:22,534 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 20:19:23,280 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-27 20:19:23,280 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-27 20:19:23,778 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-27 20:19:23,778 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-27 20:19:23,779 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1554526962] [2024-11-27 20:19:23,779 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1554526962] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-27 20:19:23,779 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-27 20:19:23,779 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2024-11-27 20:19:23,779 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1719115734] [2024-11-27 20:19:23,779 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-27 20:19:23,780 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-27 20:19:23,780 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-27 20:19:23,780 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-27 20:19:23,781 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2024-11-27 20:19:23,781 INFO L87 Difference]: Start difference. First operand 235 states and 336 transitions. Second operand has 7 states, 7 states have (on average 4.142857142857143) internal successors, (29), 6 states have internal predecessors, (29), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-11-27 20:19:24,903 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 20:19:24,903 INFO L93 Difference]: Finished difference Result 408 states and 600 transitions. [2024-11-27 20:19:24,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-27 20:19:24,905 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.142857142857143) internal successors, (29), 6 states have internal predecessors, (29), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 43 [2024-11-27 20:19:24,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 20:19:24,907 INFO L225 Difference]: With dead ends: 408 [2024-11-27 20:19:24,907 INFO L226 Difference]: Without dead ends: 326 [2024-11-27 20:19:24,908 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 79 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-11-27 20:19:24,909 INFO L435 NwaCegarLoop]: 126 mSDtfsCounter, 46 mSDsluCounter, 575 mSDsCounter, 0 mSdLazyCounter, 103 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 701 SdHoareTripleChecker+Invalid, 109 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 103 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2024-11-27 20:19:24,909 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [48 Valid, 701 Invalid, 109 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 103 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2024-11-27 20:19:24,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 326 states. [2024-11-27 20:19:24,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 326 to 322. [2024-11-27 20:19:24,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 322 states, 284 states have (on average 1.3591549295774648) internal successors, (386), 289 states have internal predecessors, (386), 32 states have call successors, (32), 2 states have call predecessors, (32), 5 states have return successors, (43), 39 states have call predecessors, (43), 31 states have call successors, (43) [2024-11-27 20:19:24,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 322 states to 322 states and 461 transitions. [2024-11-27 20:19:24,933 INFO L78 Accepts]: Start accepts. Automaton has 322 states and 461 transitions. Word has length 43 [2024-11-27 20:19:24,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-27 20:19:24,933 INFO L471 AbstractCegarLoop]: Abstraction has 322 states and 461 transitions. [2024-11-27 20:19:24,933 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.142857142857143) internal successors, (29), 6 states have internal predecessors, (29), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-11-27 20:19:24,933 INFO L276 IsEmpty]: Start isEmpty. Operand 322 states and 461 transitions. [2024-11-27 20:19:24,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2024-11-27 20:19:24,935 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 20:19:24,935 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 20:19:24,945 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef5e54c2-064e-4fe1-a295-d132e8d37af5/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2024-11-27 20:19:25,136 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef5e54c2-064e-4fe1-a295-d132e8d37af5/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 20:19:25,136 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-27 20:19:25,136 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 20:19:25,136 INFO L85 PathProgramCache]: Analyzing trace with hash 300341563, now seen corresponding path program 1 times [2024-11-27 20:19:25,137 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-27 20:19:25,137 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1225116686] [2024-11-27 20:19:25,137 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 20:19:25,137 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 20:19:25,137 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef5e54c2-064e-4fe1-a295-d132e8d37af5/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 20:19:25,139 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef5e54c2-064e-4fe1-a295-d132e8d37af5/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 20:19:25,140 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef5e54c2-064e-4fe1-a295-d132e8d37af5/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-11-27 20:19:25,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 20:19:25,203 INFO L256 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 17 conjuncts are in the unsatisfiable core [2024-11-27 20:19:25,206 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 20:19:27,058 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-27 20:19:27,058 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-27 20:19:27,058 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-27 20:19:27,058 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1225116686] [2024-11-27 20:19:27,058 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1225116686] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-27 20:19:27,058 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-27 20:19:27,058 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2024-11-27 20:19:27,059 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [799595468] [2024-11-27 20:19:27,059 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-27 20:19:27,059 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-11-27 20:19:27,059 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-27 20:19:27,060 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-11-27 20:19:27,060 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2024-11-27 20:19:27,060 INFO L87 Difference]: Start difference. First operand 322 states and 461 transitions. Second operand has 12 states, 10 states have (on average 2.8) internal successors, (28), 9 states have internal predecessors, (28), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-11-27 20:19:31,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 20:19:31,843 INFO L93 Difference]: Finished difference Result 355 states and 504 transitions. [2024-11-27 20:19:31,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-11-27 20:19:31,844 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 10 states have (on average 2.8) internal successors, (28), 9 states have internal predecessors, (28), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 43 [2024-11-27 20:19:31,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 20:19:31,847 INFO L225 Difference]: With dead ends: 355 [2024-11-27 20:19:31,847 INFO L226 Difference]: Without dead ends: 326 [2024-11-27 20:19:31,847 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2024-11-27 20:19:31,848 INFO L435 NwaCegarLoop]: 142 mSDtfsCounter, 75 mSDsluCounter, 1275 mSDsCounter, 0 mSdLazyCounter, 413 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 83 SdHoareTripleChecker+Valid, 1417 SdHoareTripleChecker+Invalid, 416 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 413 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.2s IncrementalHoareTripleChecker+Time [2024-11-27 20:19:31,849 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [83 Valid, 1417 Invalid, 416 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 413 Invalid, 0 Unknown, 0 Unchecked, 4.2s Time] [2024-11-27 20:19:31,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 326 states. [2024-11-27 20:19:31,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 326 to 326. [2024-11-27 20:19:31,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 326 states, 287 states have (on average 1.3519163763066202) internal successors, (388), 292 states have internal predecessors, (388), 32 states have call successors, (32), 3 states have call predecessors, (32), 6 states have return successors, (43), 39 states have call predecessors, (43), 31 states have call successors, (43) [2024-11-27 20:19:31,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 326 states to 326 states and 463 transitions. [2024-11-27 20:19:31,872 INFO L78 Accepts]: Start accepts. Automaton has 326 states and 463 transitions. Word has length 43 [2024-11-27 20:19:31,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-27 20:19:31,872 INFO L471 AbstractCegarLoop]: Abstraction has 326 states and 463 transitions. [2024-11-27 20:19:31,872 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 10 states have (on average 2.8) internal successors, (28), 9 states have internal predecessors, (28), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-11-27 20:19:31,872 INFO L276 IsEmpty]: Start isEmpty. Operand 326 states and 463 transitions. [2024-11-27 20:19:31,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2024-11-27 20:19:31,874 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 20:19:31,874 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 20:19:31,883 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef5e54c2-064e-4fe1-a295-d132e8d37af5/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2024-11-27 20:19:32,074 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef5e54c2-064e-4fe1-a295-d132e8d37af5/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 20:19:32,075 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-27 20:19:32,075 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 20:19:32,075 INFO L85 PathProgramCache]: Analyzing trace with hash 1898956665, now seen corresponding path program 1 times [2024-11-27 20:19:32,075 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-27 20:19:32,075 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [284895752] [2024-11-27 20:19:32,075 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 20:19:32,075 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 20:19:32,075 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef5e54c2-064e-4fe1-a295-d132e8d37af5/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 20:19:32,077 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef5e54c2-064e-4fe1-a295-d132e8d37af5/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 20:19:32,078 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef5e54c2-064e-4fe1-a295-d132e8d37af5/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-11-27 20:19:32,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 20:19:32,133 INFO L256 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-27 20:19:32,134 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 20:19:32,960 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2024-11-27 20:19:32,961 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-27 20:19:33,705 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2024-11-27 20:19:33,705 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-27 20:19:33,705 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [284895752] [2024-11-27 20:19:33,705 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [284895752] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-27 20:19:33,705 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-27 20:19:33,705 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2024-11-27 20:19:33,706 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [62440684] [2024-11-27 20:19:33,706 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-27 20:19:33,706 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-27 20:19:33,706 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-27 20:19:33,707 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-27 20:19:33,707 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2024-11-27 20:19:33,707 INFO L87 Difference]: Start difference. First operand 326 states and 463 transitions. Second operand has 8 states, 8 states have (on average 3.75) internal successors, (30), 7 states have internal predecessors, (30), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2024-11-27 20:19:34,974 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 20:19:34,974 INFO L93 Difference]: Finished difference Result 559 states and 820 transitions. [2024-11-27 20:19:34,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-27 20:19:34,975 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.75) internal successors, (30), 7 states have internal predecessors, (30), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 43 [2024-11-27 20:19:34,976 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 20:19:34,981 INFO L225 Difference]: With dead ends: 559 [2024-11-27 20:19:34,981 INFO L226 Difference]: Without dead ends: 433 [2024-11-27 20:19:34,982 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 76 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2024-11-27 20:19:34,983 INFO L435 NwaCegarLoop]: 81 mSDtfsCounter, 30 mSDsluCounter, 468 mSDsCounter, 0 mSdLazyCounter, 123 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 549 SdHoareTripleChecker+Invalid, 127 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 123 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2024-11-27 20:19:34,983 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [32 Valid, 549 Invalid, 127 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 123 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2024-11-27 20:19:34,986 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 433 states. [2024-11-27 20:19:35,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 433 to 368. [2024-11-27 20:19:35,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 368 states, 325 states have (on average 1.3476923076923077) internal successors, (438), 332 states have internal predecessors, (438), 36 states have call successors, (36), 3 states have call predecessors, (36), 6 states have return successors, (47), 43 states have call predecessors, (47), 35 states have call successors, (47) [2024-11-27 20:19:35,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 368 states to 368 states and 521 transitions. [2024-11-27 20:19:35,017 INFO L78 Accepts]: Start accepts. Automaton has 368 states and 521 transitions. Word has length 43 [2024-11-27 20:19:35,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-27 20:19:35,018 INFO L471 AbstractCegarLoop]: Abstraction has 368 states and 521 transitions. [2024-11-27 20:19:35,018 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.75) internal successors, (30), 7 states have internal predecessors, (30), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2024-11-27 20:19:35,019 INFO L276 IsEmpty]: Start isEmpty. Operand 368 states and 521 transitions. [2024-11-27 20:19:35,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2024-11-27 20:19:35,021 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 20:19:35,021 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 20:19:35,031 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef5e54c2-064e-4fe1-a295-d132e8d37af5/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2024-11-27 20:19:35,222 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef5e54c2-064e-4fe1-a295-d132e8d37af5/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 20:19:35,222 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-27 20:19:35,222 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 20:19:35,222 INFO L85 PathProgramCache]: Analyzing trace with hash 1218898295, now seen corresponding path program 1 times [2024-11-27 20:19:35,222 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-27 20:19:35,222 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [896790867] [2024-11-27 20:19:35,223 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 20:19:35,223 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 20:19:35,223 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef5e54c2-064e-4fe1-a295-d132e8d37af5/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 20:19:35,224 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef5e54c2-064e-4fe1-a295-d132e8d37af5/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 20:19:35,227 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef5e54c2-064e-4fe1-a295-d132e8d37af5/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-11-27 20:19:35,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 20:19:35,280 INFO L256 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 11 conjuncts are in the unsatisfiable core [2024-11-27 20:19:35,281 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 20:19:36,517 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2024-11-27 20:19:36,517 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-27 20:19:38,813 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-27 20:19:38,813 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [896790867] [2024-11-27 20:19:38,813 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [896790867] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-27 20:19:38,813 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [52703709] [2024-11-27 20:19:38,813 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 20:19:38,814 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-11-27 20:19:38,814 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef5e54c2-064e-4fe1-a295-d132e8d37af5/bin/uautomizer-verify-aQ6SnzHsRB/cvc4 [2024-11-27 20:19:38,822 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef5e54c2-064e-4fe1-a295-d132e8d37af5/bin/uautomizer-verify-aQ6SnzHsRB/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2024-11-27 20:19:38,825 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef5e54c2-064e-4fe1-a295-d132e8d37af5/bin/uautomizer-verify-aQ6SnzHsRB/cvc4 --incremental --print-success --lang smt (14)] Waiting until timeout for monitored process [2024-11-27 20:19:38,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 20:19:38,956 INFO L256 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 11 conjuncts are in the unsatisfiable core [2024-11-27 20:19:38,957 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 20:19:39,540 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2024-11-27 20:19:39,540 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-27 20:19:39,920 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [52703709] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-27 20:19:39,920 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-27 20:19:39,920 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2024-11-27 20:19:39,920 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1444509873] [2024-11-27 20:19:39,920 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-27 20:19:39,920 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-11-27 20:19:39,920 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-27 20:19:39,921 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-11-27 20:19:39,921 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=178, Unknown=0, NotChecked=0, Total=210 [2024-11-27 20:19:39,921 INFO L87 Difference]: Start difference. First operand 368 states and 521 transitions. Second operand has 10 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 8 states have internal predecessors, (30), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-11-27 20:19:42,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 20:19:42,512 INFO L93 Difference]: Finished difference Result 378 states and 530 transitions. [2024-11-27 20:19:42,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-27 20:19:42,513 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 8 states have internal predecessors, (30), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 43 [2024-11-27 20:19:42,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 20:19:42,515 INFO L225 Difference]: With dead ends: 378 [2024-11-27 20:19:42,515 INFO L226 Difference]: Without dead ends: 376 [2024-11-27 20:19:42,515 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 100 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=53, Invalid=253, Unknown=0, NotChecked=0, Total=306 [2024-11-27 20:19:42,516 INFO L435 NwaCegarLoop]: 130 mSDtfsCounter, 48 mSDsluCounter, 964 mSDsCounter, 0 mSdLazyCounter, 195 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 1094 SdHoareTripleChecker+Invalid, 200 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 195 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2024-11-27 20:19:42,517 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [50 Valid, 1094 Invalid, 200 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 195 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2024-11-27 20:19:42,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 376 states. [2024-11-27 20:19:42,536 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 376 to 372. [2024-11-27 20:19:42,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 372 states, 328 states have (on average 1.3445121951219512) internal successors, (441), 335 states have internal predecessors, (441), 36 states have call successors, (36), 4 states have call predecessors, (36), 7 states have return successors, (47), 43 states have call predecessors, (47), 35 states have call successors, (47) [2024-11-27 20:19:42,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 372 states to 372 states and 524 transitions. [2024-11-27 20:19:42,540 INFO L78 Accepts]: Start accepts. Automaton has 372 states and 524 transitions. Word has length 43 [2024-11-27 20:19:42,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-27 20:19:42,540 INFO L471 AbstractCegarLoop]: Abstraction has 372 states and 524 transitions. [2024-11-27 20:19:42,541 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 8 states have internal predecessors, (30), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-11-27 20:19:42,541 INFO L276 IsEmpty]: Start isEmpty. Operand 372 states and 524 transitions. [2024-11-27 20:19:42,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2024-11-27 20:19:42,542 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 20:19:42,542 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 20:19:42,552 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef5e54c2-064e-4fe1-a295-d132e8d37af5/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2024-11-27 20:19:42,745 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef5e54c2-064e-4fe1-a295-d132e8d37af5/bin/uautomizer-verify-aQ6SnzHsRB/cvc4 --incremental --print-success --lang smt (14)] Forceful destruction successful, exit code 0 [2024-11-27 20:19:42,943 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef5e54c2-064e-4fe1-a295-d132e8d37af5/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef5e54c2-064e-4fe1-a295-d132e8d37af5/bin/uautomizer-verify-aQ6SnzHsRB/cvc4 --incremental --print-success --lang smt [2024-11-27 20:19:42,943 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-27 20:19:42,944 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 20:19:42,944 INFO L85 PathProgramCache]: Analyzing trace with hash 100867385, now seen corresponding path program 1 times [2024-11-27 20:19:42,944 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-27 20:19:42,944 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [703183615] [2024-11-27 20:19:42,944 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 20:19:42,944 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 20:19:42,944 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef5e54c2-064e-4fe1-a295-d132e8d37af5/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 20:19:42,946 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef5e54c2-064e-4fe1-a295-d132e8d37af5/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 20:19:42,948 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef5e54c2-064e-4fe1-a295-d132e8d37af5/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-11-27 20:19:43,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 20:19:43,006 INFO L256 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-11-27 20:19:43,008 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 20:19:44,600 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2024-11-27 20:19:44,600 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-27 20:19:44,600 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-27 20:19:44,600 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [703183615] [2024-11-27 20:19:44,600 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [703183615] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-27 20:19:44,600 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-27 20:19:44,600 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-11-27 20:19:44,601 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [747107678] [2024-11-27 20:19:44,601 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-27 20:19:44,601 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-27 20:19:44,601 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-27 20:19:44,602 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-27 20:19:44,602 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2024-11-27 20:19:44,602 INFO L87 Difference]: Start difference. First operand 372 states and 524 transitions. Second operand has 11 states, 10 states have (on average 3.0) internal successors, (30), 9 states have internal predecessors, (30), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2024-11-27 20:19:47,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 20:19:47,557 INFO L93 Difference]: Finished difference Result 427 states and 599 transitions. [2024-11-27 20:19:47,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-11-27 20:19:47,558 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 3.0) internal successors, (30), 9 states have internal predecessors, (30), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 43 [2024-11-27 20:19:47,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 20:19:47,560 INFO L225 Difference]: With dead ends: 427 [2024-11-27 20:19:47,560 INFO L226 Difference]: Without dead ends: 340 [2024-11-27 20:19:47,561 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=44, Invalid=196, Unknown=0, NotChecked=0, Total=240 [2024-11-27 20:19:47,562 INFO L435 NwaCegarLoop]: 131 mSDtfsCounter, 60 mSDsluCounter, 1095 mSDsCounter, 0 mSdLazyCounter, 237 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 1226 SdHoareTripleChecker+Invalid, 244 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 237 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2024-11-27 20:19:47,562 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [62 Valid, 1226 Invalid, 244 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 237 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2024-11-27 20:19:47,563 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 340 states. [2024-11-27 20:19:47,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 340 to 332. [2024-11-27 20:19:47,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 332 states, 291 states have (on average 1.3367697594501717) internal successors, (389), 296 states have internal predecessors, (389), 32 states have call successors, (32), 5 states have call predecessors, (32), 8 states have return successors, (43), 39 states have call predecessors, (43), 31 states have call successors, (43) [2024-11-27 20:19:47,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 332 states to 332 states and 464 transitions. [2024-11-27 20:19:47,585 INFO L78 Accepts]: Start accepts. Automaton has 332 states and 464 transitions. Word has length 43 [2024-11-27 20:19:47,585 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-27 20:19:47,585 INFO L471 AbstractCegarLoop]: Abstraction has 332 states and 464 transitions. [2024-11-27 20:19:47,585 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 3.0) internal successors, (30), 9 states have internal predecessors, (30), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2024-11-27 20:19:47,586 INFO L276 IsEmpty]: Start isEmpty. Operand 332 states and 464 transitions. [2024-11-27 20:19:47,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2024-11-27 20:19:47,587 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 20:19:47,587 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 20:19:47,598 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef5e54c2-064e-4fe1-a295-d132e8d37af5/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2024-11-27 20:19:47,787 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef5e54c2-064e-4fe1-a295-d132e8d37af5/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 20:19:47,788 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-27 20:19:47,788 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 20:19:47,788 INFO L85 PathProgramCache]: Analyzing trace with hash 1019424117, now seen corresponding path program 1 times [2024-11-27 20:19:47,788 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-27 20:19:47,788 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2090426611] [2024-11-27 20:19:47,788 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 20:19:47,789 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 20:19:47,789 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef5e54c2-064e-4fe1-a295-d132e8d37af5/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 20:19:47,790 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef5e54c2-064e-4fe1-a295-d132e8d37af5/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 20:19:47,792 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef5e54c2-064e-4fe1-a295-d132e8d37af5/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-11-27 20:19:47,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 20:19:47,851 INFO L256 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-11-27 20:19:47,852 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 20:19:48,493 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2024-11-27 20:19:48,493 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-27 20:19:48,493 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-27 20:19:48,493 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2090426611] [2024-11-27 20:19:48,493 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2090426611] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-27 20:19:48,494 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-27 20:19:48,494 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-11-27 20:19:48,494 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [268796366] [2024-11-27 20:19:48,494 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-27 20:19:48,494 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-27 20:19:48,494 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-27 20:19:48,495 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-27 20:19:48,495 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-27 20:19:48,495 INFO L87 Difference]: Start difference. First operand 332 states and 464 transitions. Second operand has 6 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2024-11-27 20:19:49,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 20:19:49,684 INFO L93 Difference]: Finished difference Result 348 states and 481 transitions. [2024-11-27 20:19:49,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-27 20:19:49,685 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 43 [2024-11-27 20:19:49,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 20:19:49,687 INFO L225 Difference]: With dead ends: 348 [2024-11-27 20:19:49,687 INFO L226 Difference]: Without dead ends: 346 [2024-11-27 20:19:49,687 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-11-27 20:19:49,688 INFO L435 NwaCegarLoop]: 96 mSDtfsCounter, 3 mSDsluCounter, 364 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 460 SdHoareTripleChecker+Invalid, 45 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2024-11-27 20:19:49,688 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 460 Invalid, 45 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2024-11-27 20:19:49,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 346 states. [2024-11-27 20:19:49,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 346 to 338. [2024-11-27 20:19:49,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 338 states, 295 states have (on average 1.335593220338983) internal successors, (394), 301 states have internal predecessors, (394), 33 states have call successors, (33), 6 states have call predecessors, (33), 9 states have return successors, (44), 39 states have call predecessors, (44), 32 states have call successors, (44) [2024-11-27 20:19:49,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 338 states to 338 states and 471 transitions. [2024-11-27 20:19:49,718 INFO L78 Accepts]: Start accepts. Automaton has 338 states and 471 transitions. Word has length 43 [2024-11-27 20:19:49,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-27 20:19:49,718 INFO L471 AbstractCegarLoop]: Abstraction has 338 states and 471 transitions. [2024-11-27 20:19:49,718 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2024-11-27 20:19:49,718 INFO L276 IsEmpty]: Start isEmpty. Operand 338 states and 471 transitions. [2024-11-27 20:19:49,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2024-11-27 20:19:49,719 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 20:19:49,720 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 20:19:49,730 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef5e54c2-064e-4fe1-a295-d132e8d37af5/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2024-11-27 20:19:49,920 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef5e54c2-064e-4fe1-a295-d132e8d37af5/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 20:19:49,920 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-27 20:19:49,921 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 20:19:49,921 INFO L85 PathProgramCache]: Analyzing trace with hash 1076682419, now seen corresponding path program 1 times [2024-11-27 20:19:49,921 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-27 20:19:49,921 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2130906345] [2024-11-27 20:19:49,921 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 20:19:49,921 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 20:19:49,921 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef5e54c2-064e-4fe1-a295-d132e8d37af5/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 20:19:49,923 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef5e54c2-064e-4fe1-a295-d132e8d37af5/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 20:19:49,924 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef5e54c2-064e-4fe1-a295-d132e8d37af5/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2024-11-27 20:19:49,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 20:19:49,979 INFO L256 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-27 20:19:49,980 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 20:19:50,603 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2024-11-27 20:19:50,603 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-27 20:19:50,603 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-27 20:19:50,603 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2130906345] [2024-11-27 20:19:50,603 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2130906345] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-27 20:19:50,603 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-27 20:19:50,603 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-11-27 20:19:50,603 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1145156245] [2024-11-27 20:19:50,603 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-27 20:19:50,604 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-27 20:19:50,604 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-27 20:19:50,604 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-27 20:19:50,604 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-27 20:19:50,605 INFO L87 Difference]: Start difference. First operand 338 states and 471 transitions. Second operand has 6 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2024-11-27 20:19:51,411 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 20:19:51,411 INFO L93 Difference]: Finished difference Result 344 states and 476 transitions. [2024-11-27 20:19:51,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-27 20:19:51,412 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 43 [2024-11-27 20:19:51,412 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 20:19:51,414 INFO L225 Difference]: With dead ends: 344 [2024-11-27 20:19:51,414 INFO L226 Difference]: Without dead ends: 342 [2024-11-27 20:19:51,414 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-11-27 20:19:51,415 INFO L435 NwaCegarLoop]: 95 mSDtfsCounter, 3 mSDsluCounter, 360 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 455 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2024-11-27 20:19:51,415 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 455 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2024-11-27 20:19:51,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 342 states. [2024-11-27 20:19:51,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 342 to 336. [2024-11-27 20:19:51,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 336 states, 294 states have (on average 1.3333333333333333) internal successors, (392), 299 states have internal predecessors, (392), 32 states have call successors, (32), 6 states have call predecessors, (32), 9 states have return successors, (43), 39 states have call predecessors, (43), 31 states have call successors, (43) [2024-11-27 20:19:51,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 336 states to 336 states and 467 transitions. [2024-11-27 20:19:51,453 INFO L78 Accepts]: Start accepts. Automaton has 336 states and 467 transitions. Word has length 43 [2024-11-27 20:19:51,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-27 20:19:51,453 INFO L471 AbstractCegarLoop]: Abstraction has 336 states and 467 transitions. [2024-11-27 20:19:51,454 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2024-11-27 20:19:51,454 INFO L276 IsEmpty]: Start isEmpty. Operand 336 states and 467 transitions. [2024-11-27 20:19:51,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2024-11-27 20:19:51,455 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 20:19:51,456 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 20:19:51,467 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef5e54c2-064e-4fe1-a295-d132e8d37af5/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2024-11-27 20:19:51,656 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef5e54c2-064e-4fe1-a295-d132e8d37af5/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 20:19:51,657 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-27 20:19:51,657 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 20:19:51,657 INFO L85 PathProgramCache]: Analyzing trace with hash -595914348, now seen corresponding path program 1 times [2024-11-27 20:19:51,657 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-27 20:19:51,657 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [489014058] [2024-11-27 20:19:51,657 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 20:19:51,657 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 20:19:51,657 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef5e54c2-064e-4fe1-a295-d132e8d37af5/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 20:19:51,659 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef5e54c2-064e-4fe1-a295-d132e8d37af5/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 20:19:51,660 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef5e54c2-064e-4fe1-a295-d132e8d37af5/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2024-11-27 20:19:51,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 20:19:51,712 INFO L256 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-11-27 20:19:51,713 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 20:19:52,012 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-11-27 20:19:52,012 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-27 20:19:52,012 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-27 20:19:52,012 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [489014058] [2024-11-27 20:19:52,012 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [489014058] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-27 20:19:52,012 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-27 20:19:52,012 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-27 20:19:52,012 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2075197782] [2024-11-27 20:19:52,013 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-27 20:19:52,013 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-27 20:19:52,013 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-27 20:19:52,013 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-27 20:19:52,013 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-27 20:19:52,014 INFO L87 Difference]: Start difference. First operand 336 states and 467 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, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2024-11-27 20:19:52,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 20:19:52,157 INFO L93 Difference]: Finished difference Result 453 states and 642 transitions. [2024-11-27 20:19:52,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-27 20:19:52,158 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, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 44 [2024-11-27 20:19:52,158 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 20:19:52,160 INFO L225 Difference]: With dead ends: 453 [2024-11-27 20:19:52,161 INFO L226 Difference]: Without dead ends: 358 [2024-11-27 20:19:52,161 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 41 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 20:19:52,162 INFO L435 NwaCegarLoop]: 108 mSDtfsCounter, 14 mSDsluCounter, 199 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 307 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-27 20:19:52,162 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 307 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-27 20:19:52,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 358 states. [2024-11-27 20:19:52,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 358 to 358. [2024-11-27 20:19:52,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 358 states, 318 states have (on average 1.2924528301886793) internal successors, (411), 320 states have internal predecessors, (411), 30 states have call successors, (30), 6 states have call predecessors, (30), 9 states have return successors, (41), 37 states have call predecessors, (41), 29 states have call successors, (41) [2024-11-27 20:19:52,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 358 states to 358 states and 482 transitions. [2024-11-27 20:19:52,187 INFO L78 Accepts]: Start accepts. Automaton has 358 states and 482 transitions. Word has length 44 [2024-11-27 20:19:52,187 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-27 20:19:52,187 INFO L471 AbstractCegarLoop]: Abstraction has 358 states and 482 transitions. [2024-11-27 20:19:52,187 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, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2024-11-27 20:19:52,187 INFO L276 IsEmpty]: Start isEmpty. Operand 358 states and 482 transitions. [2024-11-27 20:19:52,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2024-11-27 20:19:52,189 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 20:19:52,189 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 20:19:52,199 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef5e54c2-064e-4fe1-a295-d132e8d37af5/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2024-11-27 20:19:52,389 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef5e54c2-064e-4fe1-a295-d132e8d37af5/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 20:19:52,390 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-27 20:19:52,390 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 20:19:52,390 INFO L85 PathProgramCache]: Analyzing trace with hash 387869080, now seen corresponding path program 1 times [2024-11-27 20:19:52,390 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-27 20:19:52,390 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [95233694] [2024-11-27 20:19:52,390 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 20:19:52,390 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 20:19:52,390 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef5e54c2-064e-4fe1-a295-d132e8d37af5/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 20:19:52,395 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef5e54c2-064e-4fe1-a295-d132e8d37af5/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 20:19:52,397 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef5e54c2-064e-4fe1-a295-d132e8d37af5/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2024-11-27 20:19:52,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 20:19:52,454 INFO L256 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-11-27 20:19:52,455 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 20:19:52,585 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-11-27 20:19:52,585 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-27 20:19:52,585 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-27 20:19:52,585 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [95233694] [2024-11-27 20:19:52,585 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [95233694] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-27 20:19:52,586 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-27 20:19:52,586 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-27 20:19:52,586 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1324152357] [2024-11-27 20:19:52,586 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-27 20:19:52,586 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-27 20:19:52,586 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-27 20:19:52,587 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-27 20:19:52,587 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-27 20:19:52,587 INFO L87 Difference]: Start difference. First operand 358 states and 482 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, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2024-11-27 20:19:52,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 20:19:52,728 INFO L93 Difference]: Finished difference Result 371 states and 497 transitions. [2024-11-27 20:19:52,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-27 20:19:52,729 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, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 45 [2024-11-27 20:19:52,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 20:19:52,731 INFO L225 Difference]: With dead ends: 371 [2024-11-27 20:19:52,731 INFO L226 Difference]: Without dead ends: 364 [2024-11-27 20:19:52,732 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 42 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 20:19:52,733 INFO L435 NwaCegarLoop]: 96 mSDtfsCounter, 0 mSDsluCounter, 186 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 282 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-27 20:19:52,733 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 282 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-27 20:19:52,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 364 states. [2024-11-27 20:19:52,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 364 to 364. [2024-11-27 20:19:52,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 364 states, 324 states have (on average 1.287037037037037) internal successors, (417), 326 states have internal predecessors, (417), 30 states have call successors, (30), 6 states have call predecessors, (30), 9 states have return successors, (41), 37 states have call predecessors, (41), 29 states have call successors, (41) [2024-11-27 20:19:52,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 364 states to 364 states and 488 transitions. [2024-11-27 20:19:52,757 INFO L78 Accepts]: Start accepts. Automaton has 364 states and 488 transitions. Word has length 45 [2024-11-27 20:19:52,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-27 20:19:52,757 INFO L471 AbstractCegarLoop]: Abstraction has 364 states and 488 transitions. [2024-11-27 20:19:52,757 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, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2024-11-27 20:19:52,757 INFO L276 IsEmpty]: Start isEmpty. Operand 364 states and 488 transitions. [2024-11-27 20:19:52,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2024-11-27 20:19:52,759 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 20:19:52,759 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 20:19:52,770 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef5e54c2-064e-4fe1-a295-d132e8d37af5/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2024-11-27 20:19:52,959 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef5e54c2-064e-4fe1-a295-d132e8d37af5/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 20:19:52,960 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-27 20:19:52,960 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 20:19:52,960 INFO L85 PathProgramCache]: Analyzing trace with hash -2132090854, now seen corresponding path program 1 times [2024-11-27 20:19:52,960 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-27 20:19:52,960 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1820211568] [2024-11-27 20:19:52,960 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 20:19:52,960 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 20:19:52,961 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef5e54c2-064e-4fe1-a295-d132e8d37af5/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 20:19:52,962 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef5e54c2-064e-4fe1-a295-d132e8d37af5/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 20:19:52,963 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef5e54c2-064e-4fe1-a295-d132e8d37af5/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2024-11-27 20:19:53,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 20:19:53,014 INFO L256 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-11-27 20:19:53,015 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 20:19:53,269 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-11-27 20:19:53,270 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-27 20:19:53,270 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-27 20:19:53,270 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1820211568] [2024-11-27 20:19:53,270 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1820211568] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-27 20:19:53,270 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-27 20:19:53,270 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-27 20:19:53,270 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [201435821] [2024-11-27 20:19:53,270 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-27 20:19:53,270 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-27 20:19:53,271 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-27 20:19:53,271 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-27 20:19:53,271 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-27 20:19:53,271 INFO L87 Difference]: Start difference. First operand 364 states and 488 transitions. Second operand has 5 states, 4 states have (on average 7.5) internal successors, (30), 4 states have internal predecessors, (30), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2024-11-27 20:19:53,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 20:19:53,507 INFO L93 Difference]: Finished difference Result 371 states and 494 transitions. [2024-11-27 20:19:53,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-27 20:19:53,507 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 7.5) internal successors, (30), 4 states have internal predecessors, (30), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 45 [2024-11-27 20:19:53,508 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 20:19:53,509 INFO L225 Difference]: With dead ends: 371 [2024-11-27 20:19:53,509 INFO L226 Difference]: Without dead ends: 364 [2024-11-27 20:19:53,510 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-11-27 20:19:53,511 INFO L435 NwaCegarLoop]: 96 mSDtfsCounter, 3 mSDsluCounter, 279 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 375 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-27 20:19:53,511 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 375 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-27 20:19:53,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 364 states. [2024-11-27 20:19:53,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 364 to 358. [2024-11-27 20:19:53,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 358 states, 318 states have (on average 1.279874213836478) internal successors, (407), 320 states have internal predecessors, (407), 30 states have call successors, (30), 6 states have call predecessors, (30), 9 states have return successors, (41), 37 states have call predecessors, (41), 29 states have call successors, (41) [2024-11-27 20:19:53,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 358 states to 358 states and 478 transitions. [2024-11-27 20:19:53,537 INFO L78 Accepts]: Start accepts. Automaton has 358 states and 478 transitions. Word has length 45 [2024-11-27 20:19:53,537 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-27 20:19:53,537 INFO L471 AbstractCegarLoop]: Abstraction has 358 states and 478 transitions. [2024-11-27 20:19:53,538 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 7.5) internal successors, (30), 4 states have internal predecessors, (30), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2024-11-27 20:19:53,538 INFO L276 IsEmpty]: Start isEmpty. Operand 358 states and 478 transitions. [2024-11-27 20:19:53,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2024-11-27 20:19:53,539 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 20:19:53,539 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 20:19:53,550 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef5e54c2-064e-4fe1-a295-d132e8d37af5/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2024-11-27 20:19:53,740 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef5e54c2-064e-4fe1-a295-d132e8d37af5/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 20:19:53,740 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-27 20:19:53,740 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 20:19:53,740 INFO L85 PathProgramCache]: Analyzing trace with hash 2069480440, now seen corresponding path program 1 times [2024-11-27 20:19:53,740 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-27 20:19:53,740 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [14476702] [2024-11-27 20:19:53,741 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 20:19:53,741 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 20:19:53,741 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef5e54c2-064e-4fe1-a295-d132e8d37af5/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 20:19:53,742 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef5e54c2-064e-4fe1-a295-d132e8d37af5/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 20:19:53,743 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef5e54c2-064e-4fe1-a295-d132e8d37af5/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2024-11-27 20:19:53,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 20:19:53,805 INFO L256 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-11-27 20:19:53,806 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 20:19:54,049 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-11-27 20:19:54,049 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-27 20:19:54,049 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-27 20:19:54,049 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [14476702] [2024-11-27 20:19:54,049 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [14476702] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-27 20:19:54,049 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-27 20:19:54,049 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-27 20:19:54,049 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [838183642] [2024-11-27 20:19:54,050 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-27 20:19:54,050 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-27 20:19:54,050 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-27 20:19:54,050 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-27 20:19:54,051 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-27 20:19:54,051 INFO L87 Difference]: Start difference. First operand 358 states and 478 transitions. Second operand has 4 states, 4 states have (on average 7.75) internal successors, (31), 4 states have internal predecessors, (31), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2024-11-27 20:19:54,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 20:19:54,185 INFO L93 Difference]: Finished difference Result 390 states and 519 transitions. [2024-11-27 20:19:54,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-27 20:19:54,186 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.75) internal successors, (31), 4 states have internal predecessors, (31), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 45 [2024-11-27 20:19:54,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 20:19:54,187 INFO L225 Difference]: With dead ends: 390 [2024-11-27 20:19:54,187 INFO L226 Difference]: Without dead ends: 353 [2024-11-27 20:19:54,188 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 42 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 20:19:54,188 INFO L435 NwaCegarLoop]: 93 mSDtfsCounter, 15 mSDsluCounter, 181 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 274 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-27 20:19:54,189 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 274 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-27 20:19:54,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 353 states. [2024-11-27 20:19:54,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 353 to 342. [2024-11-27 20:19:54,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 342 states, 306 states have (on average 1.2679738562091503) internal successors, (388), 306 states have internal predecessors, (388), 26 states have call successors, (26), 6 states have call predecessors, (26), 9 states have return successors, (37), 33 states have call predecessors, (37), 25 states have call successors, (37) [2024-11-27 20:19:54,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 342 states to 342 states and 451 transitions. [2024-11-27 20:19:54,211 INFO L78 Accepts]: Start accepts. Automaton has 342 states and 451 transitions. Word has length 45 [2024-11-27 20:19:54,211 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-27 20:19:54,211 INFO L471 AbstractCegarLoop]: Abstraction has 342 states and 451 transitions. [2024-11-27 20:19:54,212 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.75) internal successors, (31), 4 states have internal predecessors, (31), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2024-11-27 20:19:54,212 INFO L276 IsEmpty]: Start isEmpty. Operand 342 states and 451 transitions. [2024-11-27 20:19:54,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2024-11-27 20:19:54,213 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 20:19:54,213 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 20:19:54,223 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef5e54c2-064e-4fe1-a295-d132e8d37af5/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2024-11-27 20:19:54,417 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef5e54c2-064e-4fe1-a295-d132e8d37af5/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 20:19:54,418 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-27 20:19:54,418 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 20:19:54,418 INFO L85 PathProgramCache]: Analyzing trace with hash 2048901964, now seen corresponding path program 1 times [2024-11-27 20:19:54,419 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-27 20:19:54,419 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1415756197] [2024-11-27 20:19:54,419 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 20:19:54,419 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 20:19:54,419 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef5e54c2-064e-4fe1-a295-d132e8d37af5/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 20:19:54,420 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef5e54c2-064e-4fe1-a295-d132e8d37af5/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 20:19:54,422 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef5e54c2-064e-4fe1-a295-d132e8d37af5/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2024-11-27 20:19:54,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 20:19:54,475 INFO L256 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-11-27 20:19:54,477 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 20:19:54,673 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2024-11-27 20:19:54,673 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-27 20:19:54,673 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-27 20:19:54,673 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1415756197] [2024-11-27 20:19:54,673 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1415756197] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-27 20:19:54,673 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-27 20:19:54,673 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-27 20:19:54,674 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1700668608] [2024-11-27 20:19:54,674 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-27 20:19:54,674 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-27 20:19:54,674 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-27 20:19:54,674 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-27 20:19:54,674 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-27 20:19:54,675 INFO L87 Difference]: Start difference. First operand 342 states and 451 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, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2024-11-27 20:19:55,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 20:19:55,169 INFO L93 Difference]: Finished difference Result 400 states and 533 transitions. [2024-11-27 20:19:55,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-27 20:19:55,170 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, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 48 [2024-11-27 20:19:55,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 20:19:55,171 INFO L225 Difference]: With dead ends: 400 [2024-11-27 20:19:55,171 INFO L226 Difference]: Without dead ends: 345 [2024-11-27 20:19:55,172 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 45 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 20:19:55,172 INFO L435 NwaCegarLoop]: 106 mSDtfsCounter, 41 mSDsluCounter, 158 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 264 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-27 20:19:55,172 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [45 Valid, 264 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-11-27 20:19:55,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 345 states. [2024-11-27 20:19:55,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 345 to 344. [2024-11-27 20:19:55,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 344 states, 308 states have (on average 1.2597402597402598) internal successors, (388), 308 states have internal predecessors, (388), 26 states have call successors, (26), 6 states have call predecessors, (26), 9 states have return successors, (37), 33 states have call predecessors, (37), 25 states have call successors, (37) [2024-11-27 20:19:55,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 344 states to 344 states and 451 transitions. [2024-11-27 20:19:55,199 INFO L78 Accepts]: Start accepts. Automaton has 344 states and 451 transitions. Word has length 48 [2024-11-27 20:19:55,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-27 20:19:55,200 INFO L471 AbstractCegarLoop]: Abstraction has 344 states and 451 transitions. [2024-11-27 20:19:55,200 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, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2024-11-27 20:19:55,200 INFO L276 IsEmpty]: Start isEmpty. Operand 344 states and 451 transitions. [2024-11-27 20:19:55,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2024-11-27 20:19:55,201 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 20:19:55,201 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 20:19:55,210 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef5e54c2-064e-4fe1-a295-d132e8d37af5/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2024-11-27 20:19:55,402 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef5e54c2-064e-4fe1-a295-d132e8d37af5/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 20:19:55,403 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-27 20:19:55,404 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 20:19:55,404 INFO L85 PathProgramCache]: Analyzing trace with hash 142055626, now seen corresponding path program 1 times [2024-11-27 20:19:55,404 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-27 20:19:55,404 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1915967091] [2024-11-27 20:19:55,405 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 20:19:55,405 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 20:19:55,405 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef5e54c2-064e-4fe1-a295-d132e8d37af5/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 20:19:55,407 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef5e54c2-064e-4fe1-a295-d132e8d37af5/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 20:19:55,411 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef5e54c2-064e-4fe1-a295-d132e8d37af5/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2024-11-27 20:19:55,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 20:19:55,469 INFO L256 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-11-27 20:19:55,471 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 20:19:57,130 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2024-11-27 20:19:57,131 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-27 20:19:57,131 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-27 20:19:57,131 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1915967091] [2024-11-27 20:19:57,131 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1915967091] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-27 20:19:57,131 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-27 20:19:57,131 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-11-27 20:19:57,131 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1548450897] [2024-11-27 20:19:57,131 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-27 20:19:57,131 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-27 20:19:57,132 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-27 20:19:57,132 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-27 20:19:57,132 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2024-11-27 20:19:57,132 INFO L87 Difference]: Start difference. First operand 344 states and 451 transitions. Second operand has 11 states, 11 states have (on average 3.1818181818181817) internal successors, (35), 10 states have internal predecessors, (35), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2024-11-27 20:20:01,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 20:20:01,472 INFO L93 Difference]: Finished difference Result 387 states and 510 transitions. [2024-11-27 20:20:01,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-11-27 20:20:01,473 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.1818181818181817) internal successors, (35), 10 states have internal predecessors, (35), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 48 [2024-11-27 20:20:01,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 20:20:01,475 INFO L225 Difference]: With dead ends: 387 [2024-11-27 20:20:01,475 INFO L226 Difference]: Without dead ends: 364 [2024-11-27 20:20:01,476 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=46, Invalid=226, Unknown=0, NotChecked=0, Total=272 [2024-11-27 20:20:01,476 INFO L435 NwaCegarLoop]: 109 mSDtfsCounter, 69 mSDsluCounter, 831 mSDsCounter, 0 mSdLazyCounter, 338 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 940 SdHoareTripleChecker+Invalid, 346 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 338 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.4s IncrementalHoareTripleChecker+Time [2024-11-27 20:20:01,477 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [73 Valid, 940 Invalid, 346 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 338 Invalid, 0 Unknown, 0 Unchecked, 3.4s Time] [2024-11-27 20:20:01,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 364 states. [2024-11-27 20:20:01,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 364 to 359. [2024-11-27 20:20:01,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 359 states, 321 states have (on average 1.2585669781931463) internal successors, (404), 322 states have internal predecessors, (404), 28 states have call successors, (28), 6 states have call predecessors, (28), 9 states have return successors, (39), 35 states have call predecessors, (39), 27 states have call successors, (39) [2024-11-27 20:20:01,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 359 states to 359 states and 471 transitions. [2024-11-27 20:20:01,501 INFO L78 Accepts]: Start accepts. Automaton has 359 states and 471 transitions. Word has length 48 [2024-11-27 20:20:01,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-27 20:20:01,502 INFO L471 AbstractCegarLoop]: Abstraction has 359 states and 471 transitions. [2024-11-27 20:20:01,502 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.1818181818181817) internal successors, (35), 10 states have internal predecessors, (35), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2024-11-27 20:20:01,502 INFO L276 IsEmpty]: Start isEmpty. Operand 359 states and 471 transitions. [2024-11-27 20:20:01,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2024-11-27 20:20:01,503 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 20:20:01,503 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 20:20:01,515 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef5e54c2-064e-4fe1-a295-d132e8d37af5/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2024-11-27 20:20:01,707 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef5e54c2-064e-4fe1-a295-d132e8d37af5/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 20:20:01,708 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-27 20:20:01,708 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 20:20:01,709 INFO L85 PathProgramCache]: Analyzing trace with hash -1113305586, now seen corresponding path program 1 times [2024-11-27 20:20:01,709 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-27 20:20:01,709 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2075654013] [2024-11-27 20:20:01,709 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 20:20:01,709 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 20:20:01,709 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef5e54c2-064e-4fe1-a295-d132e8d37af5/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 20:20:01,711 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef5e54c2-064e-4fe1-a295-d132e8d37af5/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 20:20:01,714 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef5e54c2-064e-4fe1-a295-d132e8d37af5/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2024-11-27 20:20:01,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 20:20:01,772 INFO L256 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-27 20:20:01,773 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 20:20:02,127 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2024-11-27 20:20:02,127 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-27 20:20:02,127 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-27 20:20:02,127 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2075654013] [2024-11-27 20:20:02,128 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2075654013] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-27 20:20:02,128 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-27 20:20:02,128 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-27 20:20:02,128 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1649296262] [2024-11-27 20:20:02,128 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-27 20:20:02,128 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-27 20:20:02,128 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-27 20:20:02,129 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-27 20:20:02,129 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-27 20:20:02,129 INFO L87 Difference]: Start difference. First operand 359 states and 471 transitions. Second operand has 5 states, 5 states have (on average 6.2) internal successors, (31), 5 states have internal predecessors, (31), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2024-11-27 20:20:03,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 20:20:03,003 INFO L93 Difference]: Finished difference Result 430 states and 571 transitions. [2024-11-27 20:20:03,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-27 20:20:03,004 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.2) internal successors, (31), 5 states have internal predecessors, (31), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 48 [2024-11-27 20:20:03,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 20:20:03,006 INFO L225 Difference]: With dead ends: 430 [2024-11-27 20:20:03,006 INFO L226 Difference]: Without dead ends: 381 [2024-11-27 20:20:03,007 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-11-27 20:20:03,008 INFO L435 NwaCegarLoop]: 123 mSDtfsCounter, 52 mSDsluCounter, 290 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 413 SdHoareTripleChecker+Invalid, 78 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2024-11-27 20:20:03,009 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [56 Valid, 413 Invalid, 78 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 74 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2024-11-27 20:20:03,009 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 381 states. [2024-11-27 20:20:03,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 381 to 343. [2024-11-27 20:20:03,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 343 states, 307 states have (on average 1.254071661237785) internal successors, (385), 307 states have internal predecessors, (385), 26 states have call successors, (26), 6 states have call predecessors, (26), 9 states have return successors, (37), 33 states have call predecessors, (37), 25 states have call successors, (37) [2024-11-27 20:20:03,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 343 states to 343 states and 448 transitions. [2024-11-27 20:20:03,031 INFO L78 Accepts]: Start accepts. Automaton has 343 states and 448 transitions. Word has length 48 [2024-11-27 20:20:03,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-27 20:20:03,032 INFO L471 AbstractCegarLoop]: Abstraction has 343 states and 448 transitions. [2024-11-27 20:20:03,032 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.2) internal successors, (31), 5 states have internal predecessors, (31), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2024-11-27 20:20:03,032 INFO L276 IsEmpty]: Start isEmpty. Operand 343 states and 448 transitions. [2024-11-27 20:20:03,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2024-11-27 20:20:03,033 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 20:20:03,034 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 20:20:03,044 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef5e54c2-064e-4fe1-a295-d132e8d37af5/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2024-11-27 20:20:03,234 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef5e54c2-064e-4fe1-a295-d132e8d37af5/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 20:20:03,234 INFO L396 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-27 20:20:03,235 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 20:20:03,235 INFO L85 PathProgramCache]: Analyzing trace with hash 1453533571, now seen corresponding path program 1 times [2024-11-27 20:20:03,235 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-27 20:20:03,235 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1036927170] [2024-11-27 20:20:03,235 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 20:20:03,235 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 20:20:03,235 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef5e54c2-064e-4fe1-a295-d132e8d37af5/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 20:20:03,237 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef5e54c2-064e-4fe1-a295-d132e8d37af5/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 20:20:03,238 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef5e54c2-064e-4fe1-a295-d132e8d37af5/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2024-11-27 20:20:03,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 20:20:03,291 INFO L256 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-11-27 20:20:03,292 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 20:20:04,724 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-27 20:20:04,725 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-27 20:20:05,691 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-11-27 20:20:05,691 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-27 20:20:05,691 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1036927170] [2024-11-27 20:20:05,691 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1036927170] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-27 20:20:05,691 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-27 20:20:05,691 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [10] total 14 [2024-11-27 20:20:05,692 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1597289621] [2024-11-27 20:20:05,692 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-27 20:20:05,692 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-27 20:20:05,692 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-27 20:20:05,692 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-27 20:20:05,692 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2024-11-27 20:20:05,693 INFO L87 Difference]: Start difference. First operand 343 states and 448 transitions. Second operand has 6 states, 6 states have (on average 5.666666666666667) internal successors, (34), 6 states have internal predecessors, (34), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2024-11-27 20:20:07,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 20:20:07,129 INFO L93 Difference]: Finished difference Result 489 states and 660 transitions. [2024-11-27 20:20:07,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-27 20:20:07,131 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.666666666666667) internal successors, (34), 6 states have internal predecessors, (34), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 49 [2024-11-27 20:20:07,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 20:20:07,133 INFO L225 Difference]: With dead ends: 489 [2024-11-27 20:20:07,133 INFO L226 Difference]: Without dead ends: 449 [2024-11-27 20:20:07,133 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2024-11-27 20:20:07,134 INFO L435 NwaCegarLoop]: 82 mSDtfsCounter, 25 mSDsluCounter, 270 mSDsCounter, 0 mSdLazyCounter, 137 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 352 SdHoareTripleChecker+Invalid, 141 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 137 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2024-11-27 20:20:07,135 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 352 Invalid, 141 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 137 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2024-11-27 20:20:07,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 449 states. [2024-11-27 20:20:07,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 449 to 358. [2024-11-27 20:20:07,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 358 states, 318 states have (on average 1.2452830188679245) internal successors, (396), 318 states have internal predecessors, (396), 30 states have call successors, (30), 6 states have call predecessors, (30), 9 states have return successors, (41), 37 states have call predecessors, (41), 29 states have call successors, (41) [2024-11-27 20:20:07,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 358 states to 358 states and 467 transitions. [2024-11-27 20:20:07,163 INFO L78 Accepts]: Start accepts. Automaton has 358 states and 467 transitions. Word has length 49 [2024-11-27 20:20:07,163 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-27 20:20:07,163 INFO L471 AbstractCegarLoop]: Abstraction has 358 states and 467 transitions. [2024-11-27 20:20:07,164 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.666666666666667) internal successors, (34), 6 states have internal predecessors, (34), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2024-11-27 20:20:07,164 INFO L276 IsEmpty]: Start isEmpty. Operand 358 states and 467 transitions. [2024-11-27 20:20:07,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2024-11-27 20:20:07,165 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 20:20:07,165 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 20:20:07,176 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef5e54c2-064e-4fe1-a295-d132e8d37af5/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2024-11-27 20:20:07,366 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef5e54c2-064e-4fe1-a295-d132e8d37af5/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 20:20:07,366 INFO L396 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-27 20:20:07,366 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 20:20:07,366 INFO L85 PathProgramCache]: Analyzing trace with hash -2140369147, now seen corresponding path program 1 times [2024-11-27 20:20:07,366 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-27 20:20:07,367 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [904340130] [2024-11-27 20:20:07,367 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 20:20:07,367 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 20:20:07,367 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef5e54c2-064e-4fe1-a295-d132e8d37af5/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 20:20:07,371 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef5e54c2-064e-4fe1-a295-d132e8d37af5/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 20:20:07,374 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef5e54c2-064e-4fe1-a295-d132e8d37af5/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2024-11-27 20:20:07,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 20:20:07,446 INFO L256 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-11-27 20:20:07,448 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 20:20:07,604 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-11-27 20:20:07,604 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-27 20:20:07,604 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-27 20:20:07,604 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [904340130] [2024-11-27 20:20:07,604 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [904340130] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-27 20:20:07,604 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-27 20:20:07,604 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-27 20:20:07,604 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [526242990] [2024-11-27 20:20:07,604 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-27 20:20:07,605 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-27 20:20:07,605 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-27 20:20:07,605 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-27 20:20:07,605 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-27 20:20:07,605 INFO L87 Difference]: Start difference. First operand 358 states and 467 transitions. Second operand has 4 states, 4 states have (on average 8.5) internal successors, (34), 4 states have internal predecessors, (34), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2024-11-27 20:20:07,699 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 20:20:07,699 INFO L93 Difference]: Finished difference Result 377 states and 488 transitions. [2024-11-27 20:20:07,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-27 20:20:07,700 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 8.5) internal successors, (34), 4 states have internal predecessors, (34), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 49 [2024-11-27 20:20:07,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 20:20:07,702 INFO L225 Difference]: With dead ends: 377 [2024-11-27 20:20:07,702 INFO L226 Difference]: Without dead ends: 339 [2024-11-27 20:20:07,702 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 46 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 20:20:07,703 INFO L435 NwaCegarLoop]: 95 mSDtfsCounter, 0 mSDsluCounter, 184 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 279 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 20:20:07,703 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 279 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-27 20:20:07,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 339 states. [2024-11-27 20:20:07,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 339 to 338. [2024-11-27 20:20:07,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 338 states, 298 states have (on average 1.2416107382550337) internal successors, (370), 299 states have internal predecessors, (370), 30 states have call successors, (30), 6 states have call predecessors, (30), 9 states have return successors, (39), 36 states have call predecessors, (39), 29 states have call successors, (39) [2024-11-27 20:20:07,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 338 states to 338 states and 439 transitions. [2024-11-27 20:20:07,732 INFO L78 Accepts]: Start accepts. Automaton has 338 states and 439 transitions. Word has length 49 [2024-11-27 20:20:07,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-27 20:20:07,733 INFO L471 AbstractCegarLoop]: Abstraction has 338 states and 439 transitions. [2024-11-27 20:20:07,733 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.5) internal successors, (34), 4 states have internal predecessors, (34), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2024-11-27 20:20:07,733 INFO L276 IsEmpty]: Start isEmpty. Operand 338 states and 439 transitions. [2024-11-27 20:20:07,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2024-11-27 20:20:07,735 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 20:20:07,735 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 20:20:07,745 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef5e54c2-064e-4fe1-a295-d132e8d37af5/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2024-11-27 20:20:07,935 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef5e54c2-064e-4fe1-a295-d132e8d37af5/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 20:20:07,936 INFO L396 AbstractCegarLoop]: === Iteration 25 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-27 20:20:07,936 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 20:20:07,936 INFO L85 PathProgramCache]: Analyzing trace with hash 1929516195, now seen corresponding path program 1 times [2024-11-27 20:20:07,936 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-27 20:20:07,936 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [412864385] [2024-11-27 20:20:07,937 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 20:20:07,937 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 20:20:07,937 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef5e54c2-064e-4fe1-a295-d132e8d37af5/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 20:20:07,938 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef5e54c2-064e-4fe1-a295-d132e8d37af5/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 20:20:07,939 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef5e54c2-064e-4fe1-a295-d132e8d37af5/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2024-11-27 20:20:07,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 20:20:07,995 INFO L256 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 11 conjuncts are in the unsatisfiable core [2024-11-27 20:20:07,996 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 20:20:09,706 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-27 20:20:09,706 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-27 20:20:09,707 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-27 20:20:09,707 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [412864385] [2024-11-27 20:20:09,707 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [412864385] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-27 20:20:09,707 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-27 20:20:09,707 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-11-27 20:20:09,707 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1889133258] [2024-11-27 20:20:09,707 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-27 20:20:09,707 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-27 20:20:09,707 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-27 20:20:09,708 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-27 20:20:09,708 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-11-27 20:20:09,708 INFO L87 Difference]: Start difference. First operand 338 states and 439 transitions. Second operand has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 10 states have internal predecessors, (38), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2024-11-27 20:20:12,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 20:20:12,430 INFO L93 Difference]: Finished difference Result 404 states and 529 transitions. [2024-11-27 20:20:12,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-11-27 20:20:12,431 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 10 states have internal predecessors, (38), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 50 [2024-11-27 20:20:12,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 20:20:12,433 INFO L225 Difference]: With dead ends: 404 [2024-11-27 20:20:12,433 INFO L226 Difference]: Without dead ends: 371 [2024-11-27 20:20:12,433 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2024-11-27 20:20:12,434 INFO L435 NwaCegarLoop]: 88 mSDtfsCounter, 74 mSDsluCounter, 460 mSDsCounter, 0 mSdLazyCounter, 248 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 80 SdHoareTripleChecker+Valid, 548 SdHoareTripleChecker+Invalid, 260 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 248 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2024-11-27 20:20:12,434 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [80 Valid, 548 Invalid, 260 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 248 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2024-11-27 20:20:12,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 371 states. [2024-11-27 20:20:12,467 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 371 to 360. [2024-11-27 20:20:12,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 360 states, 316 states have (on average 1.2373417721518987) internal successors, (391), 319 states have internal predecessors, (391), 34 states have call successors, (34), 6 states have call predecessors, (34), 9 states have return successors, (42), 39 states have call predecessors, (42), 32 states have call successors, (42) [2024-11-27 20:20:12,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 360 states to 360 states and 467 transitions. [2024-11-27 20:20:12,477 INFO L78 Accepts]: Start accepts. Automaton has 360 states and 467 transitions. Word has length 50 [2024-11-27 20:20:12,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-27 20:20:12,478 INFO L471 AbstractCegarLoop]: Abstraction has 360 states and 467 transitions. [2024-11-27 20:20:12,478 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 10 states have internal predecessors, (38), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2024-11-27 20:20:12,478 INFO L276 IsEmpty]: Start isEmpty. Operand 360 states and 467 transitions. [2024-11-27 20:20:12,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2024-11-27 20:20:12,479 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 20:20:12,479 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 20:20:12,492 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef5e54c2-064e-4fe1-a295-d132e8d37af5/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Ended with exit code 0 [2024-11-27 20:20:12,680 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef5e54c2-064e-4fe1-a295-d132e8d37af5/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 20:20:12,680 INFO L396 AbstractCegarLoop]: === Iteration 26 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-27 20:20:12,681 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 20:20:12,681 INFO L85 PathProgramCache]: Analyzing trace with hash 1787300319, now seen corresponding path program 1 times [2024-11-27 20:20:12,681 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-27 20:20:12,681 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [452334497] [2024-11-27 20:20:12,681 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 20:20:12,681 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 20:20:12,682 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef5e54c2-064e-4fe1-a295-d132e8d37af5/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 20:20:12,684 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef5e54c2-064e-4fe1-a295-d132e8d37af5/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 20:20:12,687 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef5e54c2-064e-4fe1-a295-d132e8d37af5/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2024-11-27 20:20:12,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 20:20:12,769 INFO L256 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-11-27 20:20:12,771 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 20:20:13,552 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-11-27 20:20:13,552 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-27 20:20:13,552 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-27 20:20:13,552 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [452334497] [2024-11-27 20:20:13,552 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [452334497] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-27 20:20:13,552 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-27 20:20:13,552 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-11-27 20:20:13,553 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1250939752] [2024-11-27 20:20:13,553 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-27 20:20:13,553 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-27 20:20:13,553 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-27 20:20:13,554 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-27 20:20:13,554 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2024-11-27 20:20:13,555 INFO L87 Difference]: Start difference. First operand 360 states and 467 transitions. Second operand has 7 states, 7 states have (on average 5.142857142857143) internal successors, (36), 7 states have internal predecessors, (36), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2024-11-27 20:20:15,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 20:20:15,445 INFO L93 Difference]: Finished difference Result 475 states and 624 transitions. [2024-11-27 20:20:15,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-27 20:20:15,447 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.142857142857143) internal successors, (36), 7 states have internal predecessors, (36), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 50 [2024-11-27 20:20:15,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 20:20:15,450 INFO L225 Difference]: With dead ends: 475 [2024-11-27 20:20:15,450 INFO L226 Difference]: Without dead ends: 451 [2024-11-27 20:20:15,451 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2024-11-27 20:20:15,451 INFO L435 NwaCegarLoop]: 88 mSDtfsCounter, 27 mSDsluCounter, 355 mSDsCounter, 0 mSdLazyCounter, 191 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 443 SdHoareTripleChecker+Invalid, 195 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 191 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2024-11-27 20:20:15,452 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 443 Invalid, 195 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 191 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2024-11-27 20:20:15,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 451 states. [2024-11-27 20:20:15,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 451 to 373. [2024-11-27 20:20:15,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 373 states, 325 states have (on average 1.2523076923076923) internal successors, (407), 330 states have internal predecessors, (407), 38 states have call successors, (38), 6 states have call predecessors, (38), 9 states have return successors, (46), 42 states have call predecessors, (46), 36 states have call successors, (46) [2024-11-27 20:20:15,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 373 states to 373 states and 491 transitions. [2024-11-27 20:20:15,516 INFO L78 Accepts]: Start accepts. Automaton has 373 states and 491 transitions. Word has length 50 [2024-11-27 20:20:15,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-27 20:20:15,516 INFO L471 AbstractCegarLoop]: Abstraction has 373 states and 491 transitions. [2024-11-27 20:20:15,516 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 5.142857142857143) internal successors, (36), 7 states have internal predecessors, (36), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2024-11-27 20:20:15,516 INFO L276 IsEmpty]: Start isEmpty. Operand 373 states and 491 transitions. [2024-11-27 20:20:15,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2024-11-27 20:20:15,522 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 20:20:15,523 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 20:20:15,544 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef5e54c2-064e-4fe1-a295-d132e8d37af5/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2024-11-27 20:20:15,723 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef5e54c2-064e-4fe1-a295-d132e8d37af5/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 20:20:15,723 INFO L396 AbstractCegarLoop]: === Iteration 27 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-27 20:20:15,724 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 20:20:15,724 INFO L85 PathProgramCache]: Analyzing trace with hash -865053569, now seen corresponding path program 1 times [2024-11-27 20:20:15,724 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-27 20:20:15,724 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1031586957] [2024-11-27 20:20:15,724 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 20:20:15,725 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 20:20:15,725 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef5e54c2-064e-4fe1-a295-d132e8d37af5/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 20:20:15,727 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef5e54c2-064e-4fe1-a295-d132e8d37af5/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 20:20:15,730 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef5e54c2-064e-4fe1-a295-d132e8d37af5/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2024-11-27 20:20:15,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 20:20:15,790 INFO L256 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-11-27 20:20:15,792 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 20:20:16,149 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-11-27 20:20:16,149 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-27 20:20:16,149 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-27 20:20:16,149 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1031586957] [2024-11-27 20:20:16,149 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1031586957] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-27 20:20:16,149 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-27 20:20:16,150 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-27 20:20:16,150 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [471438821] [2024-11-27 20:20:16,150 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-27 20:20:16,150 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-27 20:20:16,150 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-27 20:20:16,151 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-27 20:20:16,151 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-27 20:20:16,151 INFO L87 Difference]: Start difference. First operand 373 states and 491 transitions. Second operand has 4 states, 4 states have (on average 9.0) internal successors, (36), 4 states have internal predecessors, (36), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2024-11-27 20:20:16,317 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 20:20:16,317 INFO L93 Difference]: Finished difference Result 420 states and 550 transitions. [2024-11-27 20:20:16,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-27 20:20:16,318 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 9.0) internal successors, (36), 4 states have internal predecessors, (36), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 50 [2024-11-27 20:20:16,318 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 20:20:16,319 INFO L225 Difference]: With dead ends: 420 [2024-11-27 20:20:16,320 INFO L226 Difference]: Without dead ends: 373 [2024-11-27 20:20:16,320 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 47 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 20:20:16,321 INFO L435 NwaCegarLoop]: 103 mSDtfsCounter, 26 mSDsluCounter, 174 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 277 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-27 20:20:16,321 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [30 Valid, 277 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-27 20:20:16,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 373 states. [2024-11-27 20:20:16,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 373 to 373. [2024-11-27 20:20:16,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 373 states, 325 states have (on average 1.2061538461538461) internal successors, (392), 330 states have internal predecessors, (392), 38 states have call successors, (38), 6 states have call predecessors, (38), 9 states have return successors, (46), 42 states have call predecessors, (46), 36 states have call successors, (46) [2024-11-27 20:20:16,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 373 states to 373 states and 476 transitions. [2024-11-27 20:20:16,359 INFO L78 Accepts]: Start accepts. Automaton has 373 states and 476 transitions. Word has length 50 [2024-11-27 20:20:16,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-27 20:20:16,360 INFO L471 AbstractCegarLoop]: Abstraction has 373 states and 476 transitions. [2024-11-27 20:20:16,360 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.0) internal successors, (36), 4 states have internal predecessors, (36), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2024-11-27 20:20:16,360 INFO L276 IsEmpty]: Start isEmpty. Operand 373 states and 476 transitions. [2024-11-27 20:20:16,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2024-11-27 20:20:16,362 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 20:20:16,362 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 20:20:16,373 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef5e54c2-064e-4fe1-a295-d132e8d37af5/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2024-11-27 20:20:16,565 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef5e54c2-064e-4fe1-a295-d132e8d37af5/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 20:20:16,566 INFO L396 AbstractCegarLoop]: === Iteration 28 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-27 20:20:16,566 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 20:20:16,566 INFO L85 PathProgramCache]: Analyzing trace with hash 722385153, now seen corresponding path program 1 times [2024-11-27 20:20:16,566 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-27 20:20:16,566 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1026435916] [2024-11-27 20:20:16,566 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 20:20:16,567 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 20:20:16,567 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef5e54c2-064e-4fe1-a295-d132e8d37af5/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 20:20:16,568 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef5e54c2-064e-4fe1-a295-d132e8d37af5/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 20:20:16,569 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef5e54c2-064e-4fe1-a295-d132e8d37af5/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2024-11-27 20:20:16,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 20:20:16,623 INFO L256 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-27 20:20:16,624 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 20:20:17,430 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-27 20:20:17,430 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-27 20:20:18,194 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-27 20:20:18,194 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-27 20:20:18,194 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1026435916] [2024-11-27 20:20:18,194 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1026435916] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-27 20:20:18,194 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-27 20:20:18,194 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2024-11-27 20:20:18,195 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [954864570] [2024-11-27 20:20:18,195 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-27 20:20:18,195 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-27 20:20:18,195 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-27 20:20:18,195 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-27 20:20:18,196 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2024-11-27 20:20:18,196 INFO L87 Difference]: Start difference. First operand 373 states and 476 transitions. Second operand has 7 states, 7 states have (on average 5.571428571428571) internal successors, (39), 6 states have internal predecessors, (39), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2024-11-27 20:20:18,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 20:20:18,999 INFO L93 Difference]: Finished difference Result 401 states and 509 transitions. [2024-11-27 20:20:19,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-27 20:20:19,000 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.571428571428571) internal successors, (39), 6 states have internal predecessors, (39), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 50 [2024-11-27 20:20:19,000 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 20:20:19,001 INFO L225 Difference]: With dead ends: 401 [2024-11-27 20:20:19,001 INFO L226 Difference]: Without dead ends: 365 [2024-11-27 20:20:19,001 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 91 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-11-27 20:20:19,002 INFO L435 NwaCegarLoop]: 101 mSDtfsCounter, 20 mSDsluCounter, 468 mSDsCounter, 0 mSdLazyCounter, 77 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 569 SdHoareTripleChecker+Invalid, 78 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 77 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2024-11-27 20:20:19,002 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 569 Invalid, 78 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 77 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2024-11-27 20:20:19,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 365 states. [2024-11-27 20:20:19,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 365 to 353. [2024-11-27 20:20:19,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 353 states, 305 states have (on average 1.2098360655737705) internal successors, (369), 311 states have internal predecessors, (369), 38 states have call successors, (38), 6 states have call predecessors, (38), 9 states have return successors, (46), 41 states have call predecessors, (46), 36 states have call successors, (46) [2024-11-27 20:20:19,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 353 states to 353 states and 453 transitions. [2024-11-27 20:20:19,026 INFO L78 Accepts]: Start accepts. Automaton has 353 states and 453 transitions. Word has length 50 [2024-11-27 20:20:19,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-27 20:20:19,026 INFO L471 AbstractCegarLoop]: Abstraction has 353 states and 453 transitions. [2024-11-27 20:20:19,026 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 5.571428571428571) internal successors, (39), 6 states have internal predecessors, (39), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2024-11-27 20:20:19,027 INFO L276 IsEmpty]: Start isEmpty. Operand 353 states and 453 transitions. [2024-11-27 20:20:19,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2024-11-27 20:20:19,028 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 20:20:19,028 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 20:20:19,037 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef5e54c2-064e-4fe1-a295-d132e8d37af5/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Ended with exit code 0 [2024-11-27 20:20:19,228 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef5e54c2-064e-4fe1-a295-d132e8d37af5/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 20:20:19,229 INFO L396 AbstractCegarLoop]: === Iteration 29 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-27 20:20:19,229 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 20:20:19,229 INFO L85 PathProgramCache]: Analyzing trace with hash -1721726817, now seen corresponding path program 1 times [2024-11-27 20:20:19,229 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-27 20:20:19,229 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [628445442] [2024-11-27 20:20:19,229 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 20:20:19,229 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 20:20:19,229 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef5e54c2-064e-4fe1-a295-d132e8d37af5/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 20:20:19,231 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef5e54c2-064e-4fe1-a295-d132e8d37af5/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 20:20:19,233 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef5e54c2-064e-4fe1-a295-d132e8d37af5/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2024-11-27 20:20:19,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 20:20:19,286 INFO L256 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-11-27 20:20:19,287 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 20:20:19,409 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-11-27 20:20:19,409 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-27 20:20:19,409 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-27 20:20:19,409 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [628445442] [2024-11-27 20:20:19,409 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [628445442] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-27 20:20:19,409 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-27 20:20:19,409 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-27 20:20:19,409 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1832639131] [2024-11-27 20:20:19,409 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-27 20:20:19,410 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-27 20:20:19,410 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-27 20:20:19,410 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-27 20:20:19,410 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-27 20:20:19,410 INFO L87 Difference]: Start difference. First operand 353 states and 453 transitions. Second operand has 4 states, 4 states have (on average 9.5) internal successors, (38), 4 states have internal predecessors, (38), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2024-11-27 20:20:19,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 20:20:19,501 INFO L93 Difference]: Finished difference Result 362 states and 461 transitions. [2024-11-27 20:20:19,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-27 20:20:19,501 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 9.5) internal successors, (38), 4 states have internal predecessors, (38), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 52 [2024-11-27 20:20:19,502 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 20:20:19,503 INFO L225 Difference]: With dead ends: 362 [2024-11-27 20:20:19,503 INFO L226 Difference]: Without dead ends: 323 [2024-11-27 20:20:19,503 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 49 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 20:20:19,504 INFO L435 NwaCegarLoop]: 94 mSDtfsCounter, 0 mSDsluCounter, 182 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 276 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 20:20:19,504 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 276 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-27 20:20:19,505 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 323 states. [2024-11-27 20:20:19,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 323 to 292. [2024-11-27 20:20:19,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 292 states, 253 states have (on average 1.209486166007905) internal successors, (306), 258 states have internal predecessors, (306), 29 states have call successors, (29), 6 states have call predecessors, (29), 9 states have return successors, (34), 31 states have call predecessors, (34), 27 states have call successors, (34) [2024-11-27 20:20:19,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 292 states to 292 states and 369 transitions. [2024-11-27 20:20:19,534 INFO L78 Accepts]: Start accepts. Automaton has 292 states and 369 transitions. Word has length 52 [2024-11-27 20:20:19,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-27 20:20:19,535 INFO L471 AbstractCegarLoop]: Abstraction has 292 states and 369 transitions. [2024-11-27 20:20:19,535 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.5) internal successors, (38), 4 states have internal predecessors, (38), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2024-11-27 20:20:19,535 INFO L276 IsEmpty]: Start isEmpty. Operand 292 states and 369 transitions. [2024-11-27 20:20:19,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2024-11-27 20:20:19,536 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 20:20:19,536 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 20:20:19,548 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef5e54c2-064e-4fe1-a295-d132e8d37af5/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Ended with exit code 0 [2024-11-27 20:20:19,736 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef5e54c2-064e-4fe1-a295-d132e8d37af5/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 20:20:19,736 INFO L396 AbstractCegarLoop]: === Iteration 30 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-27 20:20:19,737 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 20:20:19,737 INFO L85 PathProgramCache]: Analyzing trace with hash -66283809, now seen corresponding path program 1 times [2024-11-27 20:20:19,737 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-27 20:20:19,737 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [262281093] [2024-11-27 20:20:19,737 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 20:20:19,737 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 20:20:19,737 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef5e54c2-064e-4fe1-a295-d132e8d37af5/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 20:20:19,741 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef5e54c2-064e-4fe1-a295-d132e8d37af5/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 20:20:19,742 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef5e54c2-064e-4fe1-a295-d132e8d37af5/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2024-11-27 20:20:19,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 20:20:19,804 INFO L256 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-11-27 20:20:19,805 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 20:20:21,191 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-27 20:20:21,191 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-27 20:20:22,148 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-11-27 20:20:22,148 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-27 20:20:22,148 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [262281093] [2024-11-27 20:20:22,148 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [262281093] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-27 20:20:22,148 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-27 20:20:22,149 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [10] total 14 [2024-11-27 20:20:22,149 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [903347229] [2024-11-27 20:20:22,149 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-27 20:20:22,149 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-27 20:20:22,149 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-27 20:20:22,149 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-27 20:20:22,150 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2024-11-27 20:20:22,150 INFO L87 Difference]: Start difference. First operand 292 states and 369 transitions. Second operand has 6 states, 6 states have (on average 6.333333333333333) internal successors, (38), 6 states have internal predecessors, (38), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2024-11-27 20:20:23,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 20:20:23,635 INFO L93 Difference]: Finished difference Result 363 states and 458 transitions. [2024-11-27 20:20:23,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-27 20:20:23,636 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 6.333333333333333) internal successors, (38), 6 states have internal predecessors, (38), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 52 [2024-11-27 20:20:23,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 20:20:23,637 INFO L225 Difference]: With dead ends: 363 [2024-11-27 20:20:23,637 INFO L226 Difference]: Without dead ends: 308 [2024-11-27 20:20:23,638 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2024-11-27 20:20:23,639 INFO L435 NwaCegarLoop]: 81 mSDtfsCounter, 24 mSDsluCounter, 257 mSDsCounter, 0 mSdLazyCounter, 128 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 338 SdHoareTripleChecker+Invalid, 134 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 128 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2024-11-27 20:20:23,639 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 338 Invalid, 134 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 128 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2024-11-27 20:20:23,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 308 states. [2024-11-27 20:20:23,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 308 to 284. [2024-11-27 20:20:23,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 284 states, 244 states have (on average 1.2172131147540983) internal successors, (297), 248 states have internal predecessors, (297), 31 states have call successors, (31), 6 states have call predecessors, (31), 8 states have return successors, (32), 32 states have call predecessors, (32), 29 states have call successors, (32) [2024-11-27 20:20:23,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 284 states to 284 states and 360 transitions. [2024-11-27 20:20:23,663 INFO L78 Accepts]: Start accepts. Automaton has 284 states and 360 transitions. Word has length 52 [2024-11-27 20:20:23,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-27 20:20:23,663 INFO L471 AbstractCegarLoop]: Abstraction has 284 states and 360 transitions. [2024-11-27 20:20:23,663 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 6.333333333333333) internal successors, (38), 6 states have internal predecessors, (38), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2024-11-27 20:20:23,663 INFO L276 IsEmpty]: Start isEmpty. Operand 284 states and 360 transitions. [2024-11-27 20:20:23,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2024-11-27 20:20:23,664 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 20:20:23,664 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 20:20:23,673 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef5e54c2-064e-4fe1-a295-d132e8d37af5/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Ended with exit code 0 [2024-11-27 20:20:23,864 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef5e54c2-064e-4fe1-a295-d132e8d37af5/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 20:20:23,865 INFO L396 AbstractCegarLoop]: === Iteration 31 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-27 20:20:23,865 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 20:20:23,865 INFO L85 PathProgramCache]: Analyzing trace with hash 2031048038, now seen corresponding path program 1 times [2024-11-27 20:20:23,865 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-27 20:20:23,865 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [315283144] [2024-11-27 20:20:23,865 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 20:20:23,866 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 20:20:23,866 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef5e54c2-064e-4fe1-a295-d132e8d37af5/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 20:20:23,867 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef5e54c2-064e-4fe1-a295-d132e8d37af5/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 20:20:23,868 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef5e54c2-064e-4fe1-a295-d132e8d37af5/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2024-11-27 20:20:23,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 20:20:23,925 INFO L256 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 21 conjuncts are in the unsatisfiable core [2024-11-27 20:20:23,927 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 20:20:26,272 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-27 20:20:26,272 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-27 20:20:26,272 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-27 20:20:26,272 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [315283144] [2024-11-27 20:20:26,272 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [315283144] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-27 20:20:26,272 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-27 20:20:26,272 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2024-11-27 20:20:26,272 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [437649060] [2024-11-27 20:20:26,273 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-27 20:20:26,273 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-11-27 20:20:26,273 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-27 20:20:26,273 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-11-27 20:20:26,274 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2024-11-27 20:20:26,274 INFO L87 Difference]: Start difference. First operand 284 states and 360 transitions. Second operand has 13 states, 12 states have (on average 3.0) internal successors, (36), 11 states have internal predecessors, (36), 4 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2024-11-27 20:20:30,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 20:20:30,016 INFO L93 Difference]: Finished difference Result 364 states and 461 transitions. [2024-11-27 20:20:30,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-11-27 20:20:30,016 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 3.0) internal successors, (36), 11 states have internal predecessors, (36), 4 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) Word has length 53 [2024-11-27 20:20:30,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 20:20:30,017 INFO L225 Difference]: With dead ends: 364 [2024-11-27 20:20:30,017 INFO L226 Difference]: Without dead ends: 325 [2024-11-27 20:20:30,018 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=56, Invalid=250, Unknown=0, NotChecked=0, Total=306 [2024-11-27 20:20:30,019 INFO L435 NwaCegarLoop]: 127 mSDtfsCounter, 84 mSDsluCounter, 934 mSDsCounter, 0 mSdLazyCounter, 301 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 92 SdHoareTripleChecker+Valid, 1061 SdHoareTripleChecker+Invalid, 305 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 301 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2024-11-27 20:20:30,019 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [92 Valid, 1061 Invalid, 305 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 301 Invalid, 0 Unknown, 0 Unchecked, 2.8s Time] [2024-11-27 20:20:30,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 325 states. [2024-11-27 20:20:30,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 325 to 284. [2024-11-27 20:20:30,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 284 states, 244 states have (on average 1.209016393442623) internal successors, (295), 248 states have internal predecessors, (295), 31 states have call successors, (31), 6 states have call predecessors, (31), 8 states have return successors, (32), 32 states have call predecessors, (32), 29 states have call successors, (32) [2024-11-27 20:20:30,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 284 states to 284 states and 358 transitions. [2024-11-27 20:20:30,048 INFO L78 Accepts]: Start accepts. Automaton has 284 states and 358 transitions. Word has length 53 [2024-11-27 20:20:30,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-27 20:20:30,048 INFO L471 AbstractCegarLoop]: Abstraction has 284 states and 358 transitions. [2024-11-27 20:20:30,048 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 3.0) internal successors, (36), 11 states have internal predecessors, (36), 4 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2024-11-27 20:20:30,048 INFO L276 IsEmpty]: Start isEmpty. Operand 284 states and 358 transitions. [2024-11-27 20:20:30,049 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2024-11-27 20:20:30,049 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 20:20:30,049 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 20:20:30,059 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef5e54c2-064e-4fe1-a295-d132e8d37af5/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Ended with exit code 0 [2024-11-27 20:20:30,249 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef5e54c2-064e-4fe1-a295-d132e8d37af5/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 20:20:30,250 INFO L396 AbstractCegarLoop]: === Iteration 32 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-27 20:20:30,250 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 20:20:30,250 INFO L85 PathProgramCache]: Analyzing trace with hash 1888832162, now seen corresponding path program 1 times [2024-11-27 20:20:30,250 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-27 20:20:30,250 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [925267139] [2024-11-27 20:20:30,250 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 20:20:30,250 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 20:20:30,250 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef5e54c2-064e-4fe1-a295-d132e8d37af5/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 20:20:30,252 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef5e54c2-064e-4fe1-a295-d132e8d37af5/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 20:20:30,253 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef5e54c2-064e-4fe1-a295-d132e8d37af5/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2024-11-27 20:20:30,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 20:20:30,309 INFO L256 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 18 conjuncts are in the unsatisfiable core [2024-11-27 20:20:30,310 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 20:20:32,105 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2024-11-27 20:20:32,105 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-27 20:20:34,039 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-27 20:20:34,039 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [925267139] [2024-11-27 20:20:34,040 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [925267139] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-27 20:20:34,040 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1382405167] [2024-11-27 20:20:34,040 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 20:20:34,040 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-11-27 20:20:34,040 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef5e54c2-064e-4fe1-a295-d132e8d37af5/bin/uautomizer-verify-aQ6SnzHsRB/cvc4 [2024-11-27 20:20:34,042 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef5e54c2-064e-4fe1-a295-d132e8d37af5/bin/uautomizer-verify-aQ6SnzHsRB/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2024-11-27 20:20:34,043 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef5e54c2-064e-4fe1-a295-d132e8d37af5/bin/uautomizer-verify-aQ6SnzHsRB/cvc4 --incremental --print-success --lang smt (35)] Waiting until timeout for monitored process [2024-11-27 20:20:34,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 20:20:34,153 INFO L256 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-11-27 20:20:34,154 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 20:20:35,071 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2024-11-27 20:20:35,071 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-27 20:20:36,564 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1382405167] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-27 20:20:36,565 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-27 20:20:36,565 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 12 [2024-11-27 20:20:36,565 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1839903413] [2024-11-27 20:20:36,565 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-27 20:20:36,565 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-11-27 20:20:36,565 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-27 20:20:36,566 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-11-27 20:20:36,566 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=321, Unknown=0, NotChecked=0, Total=380 [2024-11-27 20:20:36,566 INFO L87 Difference]: Start difference. First operand 284 states and 358 transitions. Second operand has 12 states, 12 states have (on average 3.4166666666666665) internal successors, (41), 11 states have internal predecessors, (41), 4 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) [2024-11-27 20:20:40,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 20:20:40,393 INFO L93 Difference]: Finished difference Result 359 states and 456 transitions. [2024-11-27 20:20:40,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-11-27 20:20:40,393 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.4166666666666665) internal successors, (41), 11 states have internal predecessors, (41), 4 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) Word has length 53 [2024-11-27 20:20:40,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 20:20:40,395 INFO L225 Difference]: With dead ends: 359 [2024-11-27 20:20:40,395 INFO L226 Difference]: Without dead ends: 325 [2024-11-27 20:20:40,396 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 104 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=97, Invalid=455, Unknown=0, NotChecked=0, Total=552 [2024-11-27 20:20:40,396 INFO L435 NwaCegarLoop]: 111 mSDtfsCounter, 44 mSDsluCounter, 901 mSDsCounter, 0 mSdLazyCounter, 294 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 1012 SdHoareTripleChecker+Invalid, 298 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 294 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.0s IncrementalHoareTripleChecker+Time [2024-11-27 20:20:40,397 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [46 Valid, 1012 Invalid, 298 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 294 Invalid, 0 Unknown, 0 Unchecked, 3.0s Time] [2024-11-27 20:20:40,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 325 states. [2024-11-27 20:20:40,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 325 to 284. [2024-11-27 20:20:40,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 284 states, 244 states have (on average 1.2049180327868851) internal successors, (294), 248 states have internal predecessors, (294), 31 states have call successors, (31), 6 states have call predecessors, (31), 8 states have return successors, (32), 32 states have call predecessors, (32), 29 states have call successors, (32) [2024-11-27 20:20:40,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 284 states to 284 states and 357 transitions. [2024-11-27 20:20:40,433 INFO L78 Accepts]: Start accepts. Automaton has 284 states and 357 transitions. Word has length 53 [2024-11-27 20:20:40,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-27 20:20:40,434 INFO L471 AbstractCegarLoop]: Abstraction has 284 states and 357 transitions. [2024-11-27 20:20:40,434 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.4166666666666665) internal successors, (41), 11 states have internal predecessors, (41), 4 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) [2024-11-27 20:20:40,434 INFO L276 IsEmpty]: Start isEmpty. Operand 284 states and 357 transitions. [2024-11-27 20:20:40,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2024-11-27 20:20:40,435 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 20:20:40,435 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 20:20:40,447 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef5e54c2-064e-4fe1-a295-d132e8d37af5/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Ended with exit code 0 [2024-11-27 20:20:40,637 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef5e54c2-064e-4fe1-a295-d132e8d37af5/bin/uautomizer-verify-aQ6SnzHsRB/cvc4 --incremental --print-success --lang smt (35)] Ended with exit code 0 [2024-11-27 20:20:40,836 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef5e54c2-064e-4fe1-a295-d132e8d37af5/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef5e54c2-064e-4fe1-a295-d132e8d37af5/bin/uautomizer-verify-aQ6SnzHsRB/cvc4 --incremental --print-success --lang smt [2024-11-27 20:20:40,836 INFO L396 AbstractCegarLoop]: === Iteration 33 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-27 20:20:40,837 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 20:20:40,837 INFO L85 PathProgramCache]: Analyzing trace with hash -1881328668, now seen corresponding path program 1 times [2024-11-27 20:20:40,837 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-27 20:20:40,837 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [419540483] [2024-11-27 20:20:40,837 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 20:20:40,837 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 20:20:40,837 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef5e54c2-064e-4fe1-a295-d132e8d37af5/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 20:20:40,839 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef5e54c2-064e-4fe1-a295-d132e8d37af5/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 20:20:40,840 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef5e54c2-064e-4fe1-a295-d132e8d37af5/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2024-11-27 20:20:40,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 20:20:40,908 INFO L256 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 19 conjuncts are in the unsatisfiable core [2024-11-27 20:20:40,910 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 20:20:43,054 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2024-11-27 20:20:43,054 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-27 20:20:43,054 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-27 20:20:43,054 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [419540483] [2024-11-27 20:20:43,055 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [419540483] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-27 20:20:43,055 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-27 20:20:43,055 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2024-11-27 20:20:43,055 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [833941012] [2024-11-27 20:20:43,055 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-27 20:20:43,055 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-11-27 20:20:43,056 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-27 20:20:43,056 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-11-27 20:20:43,056 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=132, Unknown=0, NotChecked=0, Total=156 [2024-11-27 20:20:43,056 INFO L87 Difference]: Start difference. First operand 284 states and 357 transitions. Second operand has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 12 states have internal predecessors, (38), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2024-11-27 20:20:47,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 20:20:47,061 INFO L93 Difference]: Finished difference Result 349 states and 437 transitions. [2024-11-27 20:20:47,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-11-27 20:20:47,062 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 12 states have internal predecessors, (38), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) Word has length 53 [2024-11-27 20:20:47,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 20:20:47,063 INFO L225 Difference]: With dead ends: 349 [2024-11-27 20:20:47,064 INFO L226 Difference]: Without dead ends: 301 [2024-11-27 20:20:47,064 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=59, Invalid=283, Unknown=0, NotChecked=0, Total=342 [2024-11-27 20:20:47,064 INFO L435 NwaCegarLoop]: 77 mSDtfsCounter, 52 mSDsluCounter, 736 mSDsCounter, 0 mSdLazyCounter, 303 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 813 SdHoareTripleChecker+Invalid, 308 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 303 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.0s IncrementalHoareTripleChecker+Time [2024-11-27 20:20:47,064 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [54 Valid, 813 Invalid, 308 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 303 Invalid, 0 Unknown, 0 Unchecked, 3.0s Time] [2024-11-27 20:20:47,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 301 states. [2024-11-27 20:20:47,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 301 to 284. [2024-11-27 20:20:47,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 284 states, 244 states have (on average 1.1967213114754098) internal successors, (292), 248 states have internal predecessors, (292), 31 states have call successors, (31), 6 states have call predecessors, (31), 8 states have return successors, (32), 32 states have call predecessors, (32), 29 states have call successors, (32) [2024-11-27 20:20:47,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 284 states to 284 states and 355 transitions. [2024-11-27 20:20:47,087 INFO L78 Accepts]: Start accepts. Automaton has 284 states and 355 transitions. Word has length 53 [2024-11-27 20:20:47,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-27 20:20:47,087 INFO L471 AbstractCegarLoop]: Abstraction has 284 states and 355 transitions. [2024-11-27 20:20:47,088 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 12 states have internal predecessors, (38), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2024-11-27 20:20:47,088 INFO L276 IsEmpty]: Start isEmpty. Operand 284 states and 355 transitions. [2024-11-27 20:20:47,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2024-11-27 20:20:47,089 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 20:20:47,089 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 20:20:47,100 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef5e54c2-064e-4fe1-a295-d132e8d37af5/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2024-11-27 20:20:47,289 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef5e54c2-064e-4fe1-a295-d132e8d37af5/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 20:20:47,290 INFO L396 AbstractCegarLoop]: === Iteration 34 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-27 20:20:47,290 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 20:20:47,290 INFO L85 PathProgramCache]: Analyzing trace with hash -2023544544, now seen corresponding path program 1 times [2024-11-27 20:20:47,290 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-27 20:20:47,290 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [690680176] [2024-11-27 20:20:47,290 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 20:20:47,290 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 20:20:47,290 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef5e54c2-064e-4fe1-a295-d132e8d37af5/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 20:20:47,293 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef5e54c2-064e-4fe1-a295-d132e8d37af5/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 20:20:47,293 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef5e54c2-064e-4fe1-a295-d132e8d37af5/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2024-11-27 20:20:47,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 20:20:47,352 INFO L256 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 11 conjuncts are in the unsatisfiable core [2024-11-27 20:20:47,353 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 20:20:53,739 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2024-11-27 20:20:53,739 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-27 20:20:55,332 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-27 20:20:55,333 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [690680176] [2024-11-27 20:20:55,333 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [690680176] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-27 20:20:55,333 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [86135324] [2024-11-27 20:20:55,333 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 20:20:55,333 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-11-27 20:20:55,333 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef5e54c2-064e-4fe1-a295-d132e8d37af5/bin/uautomizer-verify-aQ6SnzHsRB/cvc4 [2024-11-27 20:20:55,337 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef5e54c2-064e-4fe1-a295-d132e8d37af5/bin/uautomizer-verify-aQ6SnzHsRB/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2024-11-27 20:20:55,340 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef5e54c2-064e-4fe1-a295-d132e8d37af5/bin/uautomizer-verify-aQ6SnzHsRB/cvc4 --incremental --print-success --lang smt (38)] Waiting until timeout for monitored process [2024-11-27 20:20:55,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 20:20:55,484 INFO L256 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-27 20:20:55,485 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 20:20:56,081 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2024-11-27 20:20:56,081 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-27 20:20:56,081 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [86135324] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-27 20:20:56,081 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-27 20:20:56,081 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [10] total 10 [2024-11-27 20:20:56,081 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [465460836] [2024-11-27 20:20:56,082 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-27 20:20:56,082 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-27 20:20:56,082 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-27 20:20:56,082 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-27 20:20:56,083 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2024-11-27 20:20:56,083 INFO L87 Difference]: Start difference. First operand 284 states and 355 transitions. Second operand has 8 states, 7 states have (on average 4.857142857142857) internal successors, (34), 7 states have internal predecessors, (34), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-11-27 20:20:57,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 20:20:57,346 INFO L93 Difference]: Finished difference Result 302 states and 374 transitions. [2024-11-27 20:20:57,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-27 20:20:57,346 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 4.857142857142857) internal successors, (34), 7 states have internal predecessors, (34), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 53 [2024-11-27 20:20:57,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 20:20:57,348 INFO L225 Difference]: With dead ends: 302 [2024-11-27 20:20:57,349 INFO L226 Difference]: Without dead ends: 300 [2024-11-27 20:20:57,349 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 99 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 7.4s TimeCoverageRelationStatistics Valid=56, Invalid=184, Unknown=0, NotChecked=0, Total=240 [2024-11-27 20:20:57,349 INFO L435 NwaCegarLoop]: 87 mSDtfsCounter, 10 mSDsluCounter, 248 mSDsCounter, 0 mSdLazyCounter, 56 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 335 SdHoareTripleChecker+Invalid, 57 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 56 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2024-11-27 20:20:57,349 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 335 Invalid, 57 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 56 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2024-11-27 20:20:57,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 300 states. [2024-11-27 20:20:57,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 300 to 290. [2024-11-27 20:20:57,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 290 states, 247 states have (on average 1.194331983805668) internal successors, (295), 253 states have internal predecessors, (295), 33 states have call successors, (33), 7 states have call predecessors, (33), 9 states have return successors, (34), 32 states have call predecessors, (34), 31 states have call successors, (34) [2024-11-27 20:20:57,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 290 states to 290 states and 362 transitions. [2024-11-27 20:20:57,385 INFO L78 Accepts]: Start accepts. Automaton has 290 states and 362 transitions. Word has length 53 [2024-11-27 20:20:57,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-27 20:20:57,385 INFO L471 AbstractCegarLoop]: Abstraction has 290 states and 362 transitions. [2024-11-27 20:20:57,385 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 4.857142857142857) internal successors, (34), 7 states have internal predecessors, (34), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-11-27 20:20:57,385 INFO L276 IsEmpty]: Start isEmpty. Operand 290 states and 362 transitions. [2024-11-27 20:20:57,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2024-11-27 20:20:57,386 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 20:20:57,388 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 20:20:57,391 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef5e54c2-064e-4fe1-a295-d132e8d37af5/bin/uautomizer-verify-aQ6SnzHsRB/cvc4 --incremental --print-success --lang smt (38)] Ended with exit code 0 [2024-11-27 20:20:57,600 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef5e54c2-064e-4fe1-a295-d132e8d37af5/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Ended with exit code 0 [2024-11-27 20:20:57,790 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef5e54c2-064e-4fe1-a295-d132e8d37af5/bin/uautomizer-verify-aQ6SnzHsRB/cvc4 --incremental --print-success --lang smt,37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef5e54c2-064e-4fe1-a295-d132e8d37af5/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 20:20:57,791 INFO L396 AbstractCegarLoop]: === Iteration 35 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-27 20:20:57,791 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 20:20:57,791 INFO L85 PathProgramCache]: Analyzing trace with hash -1777301099, now seen corresponding path program 1 times [2024-11-27 20:20:57,791 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-27 20:20:57,791 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [822497392] [2024-11-27 20:20:57,791 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 20:20:57,791 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 20:20:57,792 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef5e54c2-064e-4fe1-a295-d132e8d37af5/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 20:20:57,793 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef5e54c2-064e-4fe1-a295-d132e8d37af5/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 20:20:57,794 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef5e54c2-064e-4fe1-a295-d132e8d37af5/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2024-11-27 20:20:57,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 20:20:57,856 INFO L256 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-27 20:20:57,858 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 20:20:58,751 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-27 20:20:58,751 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-27 20:21:00,140 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-27 20:21:00,140 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-27 20:21:00,140 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [822497392] [2024-11-27 20:21:00,140 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [822497392] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-27 20:21:00,140 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-27 20:21:00,140 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2024-11-27 20:21:00,141 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [920737340] [2024-11-27 20:21:00,141 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-27 20:21:00,142 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-11-27 20:21:00,142 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-27 20:21:00,142 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-11-27 20:21:00,143 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2024-11-27 20:21:00,143 INFO L87 Difference]: Start difference. First operand 290 states and 362 transitions. Second operand has 13 states, 13 states have (on average 4.0) internal successors, (52), 11 states have internal predecessors, (52), 5 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) [2024-11-27 20:21:02,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 20:21:02,098 INFO L93 Difference]: Finished difference Result 353 states and 441 transitions. [2024-11-27 20:21:02,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-27 20:21:02,099 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.0) internal successors, (52), 11 states have internal predecessors, (52), 5 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) Word has length 54 [2024-11-27 20:21:02,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 20:21:02,101 INFO L225 Difference]: With dead ends: 353 [2024-11-27 20:21:02,101 INFO L226 Difference]: Without dead ends: 299 [2024-11-27 20:21:02,101 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 95 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2024-11-27 20:21:02,101 INFO L435 NwaCegarLoop]: 98 mSDtfsCounter, 34 mSDsluCounter, 1014 mSDsCounter, 0 mSdLazyCounter, 168 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 1112 SdHoareTripleChecker+Invalid, 170 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 168 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2024-11-27 20:21:02,102 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [35 Valid, 1112 Invalid, 170 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 168 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2024-11-27 20:21:02,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 299 states. [2024-11-27 20:21:02,126 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 299 to 275. [2024-11-27 20:21:02,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 275 states, 234 states have (on average 1.1794871794871795) internal successors, (276), 238 states have internal predecessors, (276), 31 states have call successors, (31), 7 states have call predecessors, (31), 9 states have return successors, (32), 30 states have call predecessors, (32), 29 states have call successors, (32) [2024-11-27 20:21:02,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 275 states to 275 states and 339 transitions. [2024-11-27 20:21:02,128 INFO L78 Accepts]: Start accepts. Automaton has 275 states and 339 transitions. Word has length 54 [2024-11-27 20:21:02,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-27 20:21:02,128 INFO L471 AbstractCegarLoop]: Abstraction has 275 states and 339 transitions. [2024-11-27 20:21:02,128 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 4.0) internal successors, (52), 11 states have internal predecessors, (52), 5 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) [2024-11-27 20:21:02,128 INFO L276 IsEmpty]: Start isEmpty. Operand 275 states and 339 transitions. [2024-11-27 20:21:02,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2024-11-27 20:21:02,129 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 20:21:02,129 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 20:21:02,140 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef5e54c2-064e-4fe1-a295-d132e8d37af5/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Ended with exit code 0 [2024-11-27 20:21:02,330 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef5e54c2-064e-4fe1-a295-d132e8d37af5/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 20:21:02,330 INFO L396 AbstractCegarLoop]: === Iteration 36 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-27 20:21:02,330 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 20:21:02,330 INFO L85 PathProgramCache]: Analyzing trace with hash 1493072599, now seen corresponding path program 1 times [2024-11-27 20:21:02,331 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-27 20:21:02,331 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [769351200] [2024-11-27 20:21:02,331 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 20:21:02,331 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 20:21:02,331 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef5e54c2-064e-4fe1-a295-d132e8d37af5/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 20:21:02,332 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef5e54c2-064e-4fe1-a295-d132e8d37af5/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 20:21:02,334 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef5e54c2-064e-4fe1-a295-d132e8d37af5/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2024-11-27 20:21:02,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 20:21:02,392 INFO L256 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-11-27 20:21:02,398 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 20:21:03,432 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2024-11-27 20:21:03,432 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-27 20:21:03,432 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-27 20:21:03,432 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [769351200] [2024-11-27 20:21:03,432 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [769351200] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-27 20:21:03,432 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-27 20:21:03,432 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-11-27 20:21:03,432 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [562725514] [2024-11-27 20:21:03,432 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-27 20:21:03,433 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-11-27 20:21:03,433 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-27 20:21:03,433 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-11-27 20:21:03,433 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2024-11-27 20:21:03,434 INFO L87 Difference]: Start difference. First operand 275 states and 339 transitions. Second operand has 9 states, 9 states have (on average 4.333333333333333) internal successors, (39), 8 states have internal predecessors, (39), 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 20:21:05,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 20:21:05,145 INFO L93 Difference]: Finished difference Result 303 states and 368 transitions. [2024-11-27 20:21:05,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-11-27 20:21:05,146 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.333333333333333) internal successors, (39), 8 states have internal predecessors, (39), 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 54 [2024-11-27 20:21:05,146 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 20:21:05,147 INFO L225 Difference]: With dead ends: 303 [2024-11-27 20:21:05,147 INFO L226 Difference]: Without dead ends: 240 [2024-11-27 20:21:05,147 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2024-11-27 20:21:05,148 INFO L435 NwaCegarLoop]: 82 mSDtfsCounter, 36 mSDsluCounter, 557 mSDsCounter, 0 mSdLazyCounter, 119 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 639 SdHoareTripleChecker+Invalid, 122 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 119 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2024-11-27 20:21:05,148 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [37 Valid, 639 Invalid, 122 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 119 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2024-11-27 20:21:05,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 240 states. [2024-11-27 20:21:05,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 240 to 224. [2024-11-27 20:21:05,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 224 states, 191 states have (on average 1.1675392670157068) internal successors, (223), 195 states have internal predecessors, (223), 23 states have call successors, (23), 7 states have call predecessors, (23), 9 states have return successors, (24), 22 states have call predecessors, (24), 21 states have call successors, (24) [2024-11-27 20:21:05,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 270 transitions. [2024-11-27 20:21:05,166 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 270 transitions. Word has length 54 [2024-11-27 20:21:05,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-27 20:21:05,167 INFO L471 AbstractCegarLoop]: Abstraction has 224 states and 270 transitions. [2024-11-27 20:21:05,167 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.333333333333333) internal successors, (39), 8 states have internal predecessors, (39), 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 20:21:05,167 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 270 transitions. [2024-11-27 20:21:05,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2024-11-27 20:21:05,168 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 20:21:05,168 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 20:21:05,178 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef5e54c2-064e-4fe1-a295-d132e8d37af5/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Ended with exit code 0 [2024-11-27 20:21:05,368 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef5e54c2-064e-4fe1-a295-d132e8d37af5/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 20:21:05,369 INFO L396 AbstractCegarLoop]: === Iteration 37 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-27 20:21:05,369 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 20:21:05,369 INFO L85 PathProgramCache]: Analyzing trace with hash 1379347739, now seen corresponding path program 1 times [2024-11-27 20:21:05,369 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-27 20:21:05,369 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1286226999] [2024-11-27 20:21:05,369 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 20:21:05,369 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 20:21:05,370 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef5e54c2-064e-4fe1-a295-d132e8d37af5/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 20:21:05,371 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef5e54c2-064e-4fe1-a295-d132e8d37af5/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 20:21:05,373 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef5e54c2-064e-4fe1-a295-d132e8d37af5/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2024-11-27 20:21:05,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 20:21:05,436 INFO L256 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-11-27 20:21:05,437 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 20:21:19,279 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2024-11-27 20:21:19,279 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-27 20:21:21,123 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-27 20:21:21,123 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1286226999] [2024-11-27 20:21:21,123 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1286226999] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-27 20:21:21,123 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1337767216] [2024-11-27 20:21:21,123 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 20:21:21,124 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-11-27 20:21:21,124 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef5e54c2-064e-4fe1-a295-d132e8d37af5/bin/uautomizer-verify-aQ6SnzHsRB/cvc4 [2024-11-27 20:21:21,125 INFO L229 MonitoredProcess]: Starting monitored process 42 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef5e54c2-064e-4fe1-a295-d132e8d37af5/bin/uautomizer-verify-aQ6SnzHsRB/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2024-11-27 20:21:21,127 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef5e54c2-064e-4fe1-a295-d132e8d37af5/bin/uautomizer-verify-aQ6SnzHsRB/cvc4 --incremental --print-success --lang smt (42)] Waiting until timeout for monitored process [2024-11-27 20:21:21,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 20:21:21,239 INFO L256 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-27 20:21:21,239 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 20:21:34,014 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2024-11-27 20:21:34,014 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-27 20:21:34,015 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1337767216] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-27 20:21:34,015 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-27 20:21:34,015 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [11] total 12 [2024-11-27 20:21:34,015 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2121411624] [2024-11-27 20:21:34,015 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-27 20:21:34,015 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-27 20:21:34,015 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-27 20:21:34,016 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-27 20:21:34,016 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=236, Unknown=4, NotChecked=0, Total=306 [2024-11-27 20:21:34,016 INFO L87 Difference]: Start difference. First operand 224 states and 270 transitions. Second operand has 8 states, 7 states have (on average 5.0) internal successors, (35), 7 states have internal predecessors, (35), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-11-27 20:21:38,070 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2024-11-27 20:21:42,127 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2024-11-27 20:21:46,131 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2024-11-27 20:21:50,150 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.02s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2024-11-27 20:21:54,198 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2024-11-27 20:21:59,242 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2024-11-27 20:22:03,542 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2024-11-27 20:22:07,549 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2024-11-27 20:22:08,403 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 20:22:08,403 INFO L93 Difference]: Finished difference Result 234 states and 279 transitions. [2024-11-27 20:22:08,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-27 20:22:08,403 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 5.0) internal successors, (35), 7 states have internal predecessors, (35), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 54 [2024-11-27 20:22:08,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 20:22:08,405 INFO L225 Difference]: With dead ends: 234 [2024-11-27 20:22:08,405 INFO L226 Difference]: Without dead ends: 232 [2024-11-27 20:22:08,405 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 99 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 27.4s TimeCoverageRelationStatistics Valid=73, Invalid=265, Unknown=4, NotChecked=0, Total=342 [2024-11-27 20:22:08,406 INFO L435 NwaCegarLoop]: 86 mSDtfsCounter, 7 mSDsluCounter, 476 mSDsCounter, 0 mSdLazyCounter, 82 mSolverCounterSat, 0 mSolverCounterUnsat, 8 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 34.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 562 SdHoareTripleChecker+Invalid, 90 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 82 IncrementalHoareTripleChecker+Invalid, 8 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 34.2s IncrementalHoareTripleChecker+Time [2024-11-27 20:22:08,406 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 562 Invalid, 90 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 82 Invalid, 8 Unknown, 0 Unchecked, 34.2s Time] [2024-11-27 20:22:08,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 232 states. [2024-11-27 20:22:08,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 232 to 222. [2024-11-27 20:22:08,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 222 states, 191 states have (on average 1.1675392670157068) internal successors, (223), 193 states have internal predecessors, (223), 21 states have call successors, (21), 7 states have call predecessors, (21), 9 states have return successors, (22), 22 states have call predecessors, (22), 19 states have call successors, (22) [2024-11-27 20:22:08,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 222 states to 222 states and 266 transitions. [2024-11-27 20:22:08,435 INFO L78 Accepts]: Start accepts. Automaton has 222 states and 266 transitions. Word has length 54 [2024-11-27 20:22:08,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-27 20:22:08,436 INFO L471 AbstractCegarLoop]: Abstraction has 222 states and 266 transitions. [2024-11-27 20:22:08,436 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 5.0) internal successors, (35), 7 states have internal predecessors, (35), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-11-27 20:22:08,436 INFO L276 IsEmpty]: Start isEmpty. Operand 222 states and 266 transitions. [2024-11-27 20:22:08,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2024-11-27 20:22:08,437 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 20:22:08,437 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 20:22:08,450 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef5e54c2-064e-4fe1-a295-d132e8d37af5/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Ended with exit code 0 [2024-11-27 20:22:08,640 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef5e54c2-064e-4fe1-a295-d132e8d37af5/bin/uautomizer-verify-aQ6SnzHsRB/cvc4 --incremental --print-success --lang smt (42)] Ended with exit code 0 [2024-11-27 20:22:08,838 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef5e54c2-064e-4fe1-a295-d132e8d37af5/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,42 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef5e54c2-064e-4fe1-a295-d132e8d37af5/bin/uautomizer-verify-aQ6SnzHsRB/cvc4 --incremental --print-success --lang smt [2024-11-27 20:22:08,838 INFO L396 AbstractCegarLoop]: === Iteration 38 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-27 20:22:08,838 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 20:22:08,839 INFO L85 PathProgramCache]: Analyzing trace with hash -324137263, now seen corresponding path program 1 times [2024-11-27 20:22:08,839 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-27 20:22:08,839 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1626494709] [2024-11-27 20:22:08,839 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 20:22:08,839 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 20:22:08,839 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef5e54c2-064e-4fe1-a295-d132e8d37af5/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 20:22:08,842 INFO L229 MonitoredProcess]: Starting monitored process 43 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef5e54c2-064e-4fe1-a295-d132e8d37af5/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 20:22:08,843 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef5e54c2-064e-4fe1-a295-d132e8d37af5/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2024-11-27 20:22:08,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 20:22:08,906 INFO L256 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-11-27 20:22:08,907 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 20:22:09,335 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2024-11-27 20:22:09,335 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-27 20:22:09,335 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-27 20:22:09,335 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1626494709] [2024-11-27 20:22:09,336 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1626494709] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-27 20:22:09,336 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-27 20:22:09,336 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-11-27 20:22:09,336 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [692571630] [2024-11-27 20:22:09,336 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-27 20:22:09,336 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-27 20:22:09,336 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-27 20:22:09,337 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-27 20:22:09,337 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-27 20:22:09,337 INFO L87 Difference]: Start difference. First operand 222 states and 266 transitions. Second operand has 6 states, 5 states have (on average 8.4) internal successors, (42), 5 states have internal predecessors, (42), 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 20:22:09,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 20:22:09,712 INFO L93 Difference]: Finished difference Result 234 states and 278 transitions. [2024-11-27 20:22:09,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-27 20:22:09,713 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 8.4) internal successors, (42), 5 states have internal predecessors, (42), 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 59 [2024-11-27 20:22:09,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 20:22:09,714 INFO L225 Difference]: With dead ends: 234 [2024-11-27 20:22:09,714 INFO L226 Difference]: Without dead ends: 232 [2024-11-27 20:22:09,714 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-11-27 20:22:09,715 INFO L435 NwaCegarLoop]: 92 mSDtfsCounter, 8 mSDsluCounter, 352 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 444 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-27 20:22:09,715 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 444 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-27 20:22:09,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 232 states. [2024-11-27 20:22:09,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 232 to 228. [2024-11-27 20:22:09,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 228 states, 195 states have (on average 1.1641025641025642) internal successors, (227), 198 states have internal predecessors, (227), 22 states have call successors, (22), 8 states have call predecessors, (22), 10 states have return successors, (23), 22 states have call predecessors, (23), 20 states have call successors, (23) [2024-11-27 20:22:09,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 228 states to 228 states and 272 transitions. [2024-11-27 20:22:09,733 INFO L78 Accepts]: Start accepts. Automaton has 228 states and 272 transitions. Word has length 59 [2024-11-27 20:22:09,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-27 20:22:09,733 INFO L471 AbstractCegarLoop]: Abstraction has 228 states and 272 transitions. [2024-11-27 20:22:09,733 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 8.4) internal successors, (42), 5 states have internal predecessors, (42), 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 20:22:09,734 INFO L276 IsEmpty]: Start isEmpty. Operand 228 states and 272 transitions. [2024-11-27 20:22:09,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2024-11-27 20:22:09,735 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 20:22:09,735 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 20:22:09,747 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef5e54c2-064e-4fe1-a295-d132e8d37af5/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Ended with exit code 0 [2024-11-27 20:22:09,935 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 43 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef5e54c2-064e-4fe1-a295-d132e8d37af5/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 20:22:09,935 INFO L396 AbstractCegarLoop]: === Iteration 39 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-27 20:22:09,936 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 20:22:09,936 INFO L85 PathProgramCache]: Analyzing trace with hash 1721027925, now seen corresponding path program 1 times [2024-11-27 20:22:09,936 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-27 20:22:09,936 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1800934810] [2024-11-27 20:22:09,936 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 20:22:09,936 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 20:22:09,936 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef5e54c2-064e-4fe1-a295-d132e8d37af5/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 20:22:09,938 INFO L229 MonitoredProcess]: Starting monitored process 44 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef5e54c2-064e-4fe1-a295-d132e8d37af5/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 20:22:09,940 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef5e54c2-064e-4fe1-a295-d132e8d37af5/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2024-11-27 20:22:10,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 20:22:10,025 INFO L256 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-11-27 20:22:10,027 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 20:22:10,421 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2024-11-27 20:22:10,421 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-27 20:22:10,421 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-27 20:22:10,421 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1800934810] [2024-11-27 20:22:10,421 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1800934810] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-27 20:22:10,421 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-27 20:22:10,421 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-11-27 20:22:10,421 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [752194661] [2024-11-27 20:22:10,422 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-27 20:22:10,422 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-27 20:22:10,422 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-27 20:22:10,422 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-27 20:22:10,422 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-27 20:22:10,423 INFO L87 Difference]: Start difference. First operand 228 states and 272 transitions. Second operand has 6 states, 5 states have (on average 8.4) internal successors, (42), 5 states have internal predecessors, (42), 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 20:22:10,829 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 20:22:10,829 INFO L93 Difference]: Finished difference Result 249 states and 293 transitions. [2024-11-27 20:22:10,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-27 20:22:10,830 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 8.4) internal successors, (42), 5 states have internal predecessors, (42), 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 59 [2024-11-27 20:22:10,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 20:22:10,831 INFO L225 Difference]: With dead ends: 249 [2024-11-27 20:22:10,831 INFO L226 Difference]: Without dead ends: 247 [2024-11-27 20:22:10,832 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-11-27 20:22:10,832 INFO L435 NwaCegarLoop]: 104 mSDtfsCounter, 19 mSDsluCounter, 388 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 492 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-27 20:22:10,832 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 492 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-27 20:22:10,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 247 states. [2024-11-27 20:22:10,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 247 to 232. [2024-11-27 20:22:10,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 232 states, 198 states have (on average 1.1616161616161615) internal successors, (230), 201 states have internal predecessors, (230), 22 states have call successors, (22), 9 states have call predecessors, (22), 11 states have return successors, (23), 22 states have call predecessors, (23), 20 states have call successors, (23) [2024-11-27 20:22:10,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 232 states to 232 states and 275 transitions. [2024-11-27 20:22:10,852 INFO L78 Accepts]: Start accepts. Automaton has 232 states and 275 transitions. Word has length 59 [2024-11-27 20:22:10,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-27 20:22:10,853 INFO L471 AbstractCegarLoop]: Abstraction has 232 states and 275 transitions. [2024-11-27 20:22:10,853 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 8.4) internal successors, (42), 5 states have internal predecessors, (42), 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 20:22:10,853 INFO L276 IsEmpty]: Start isEmpty. Operand 232 states and 275 transitions. [2024-11-27 20:22:10,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2024-11-27 20:22:10,854 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 20:22:10,854 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 20:22:10,864 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef5e54c2-064e-4fe1-a295-d132e8d37af5/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Ended with exit code 0 [2024-11-27 20:22:11,054 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef5e54c2-064e-4fe1-a295-d132e8d37af5/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 20:22:11,055 INFO L396 AbstractCegarLoop]: === Iteration 40 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-27 20:22:11,056 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 20:22:11,056 INFO L85 PathProgramCache]: Analyzing trace with hash -1001210711, now seen corresponding path program 1 times [2024-11-27 20:22:11,056 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-27 20:22:11,056 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2000121297] [2024-11-27 20:22:11,056 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 20:22:11,056 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 20:22:11,056 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef5e54c2-064e-4fe1-a295-d132e8d37af5/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 20:22:11,060 INFO L229 MonitoredProcess]: Starting monitored process 45 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef5e54c2-064e-4fe1-a295-d132e8d37af5/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 20:22:11,063 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef5e54c2-064e-4fe1-a295-d132e8d37af5/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2024-11-27 20:22:11,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 20:22:11,174 INFO L256 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 20 conjuncts are in the unsatisfiable core [2024-11-27 20:22:11,177 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 20:22:15,985 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2024-11-27 20:22:15,985 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-27 20:22:15,985 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-27 20:22:15,985 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2000121297] [2024-11-27 20:22:15,985 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2000121297] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-27 20:22:15,986 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-27 20:22:15,986 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2024-11-27 20:22:15,986 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [783771785] [2024-11-27 20:22:15,986 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-27 20:22:15,986 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-11-27 20:22:15,986 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-27 20:22:15,987 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-11-27 20:22:15,987 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=132, Unknown=0, NotChecked=0, Total=156 [2024-11-27 20:22:15,987 INFO L87 Difference]: Start difference. First operand 232 states and 275 transitions. Second operand has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 13 states have internal predecessors, (40), 4 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2024-11-27 20:22:26,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 20:22:26,887 INFO L93 Difference]: Finished difference Result 319 states and 385 transitions. [2024-11-27 20:22:26,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-11-27 20:22:26,888 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 13 states have internal predecessors, (40), 4 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) Word has length 64 [2024-11-27 20:22:26,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 20:22:26,890 INFO L225 Difference]: With dead ends: 319 [2024-11-27 20:22:26,890 INFO L226 Difference]: Without dead ends: 289 [2024-11-27 20:22:26,890 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=28, Invalid=154, Unknown=0, NotChecked=0, Total=182 [2024-11-27 20:22:26,891 INFO L435 NwaCegarLoop]: 105 mSDtfsCounter, 30 mSDsluCounter, 773 mSDsCounter, 0 mSdLazyCounter, 504 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 878 SdHoareTripleChecker+Invalid, 509 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 504 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10.6s IncrementalHoareTripleChecker+Time [2024-11-27 20:22:26,891 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 878 Invalid, 509 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 504 Invalid, 0 Unknown, 0 Unchecked, 10.6s Time] [2024-11-27 20:22:26,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 289 states. [2024-11-27 20:22:26,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 289 to 241. [2024-11-27 20:22:26,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 241 states, 206 states have (on average 1.1650485436893203) internal successors, (240), 209 states have internal predecessors, (240), 23 states have call successors, (23), 9 states have call predecessors, (23), 11 states have return successors, (24), 23 states have call predecessors, (24), 21 states have call successors, (24) [2024-11-27 20:22:26,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 241 states to 241 states and 287 transitions. [2024-11-27 20:22:26,914 INFO L78 Accepts]: Start accepts. Automaton has 241 states and 287 transitions. Word has length 64 [2024-11-27 20:22:26,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-27 20:22:26,914 INFO L471 AbstractCegarLoop]: Abstraction has 241 states and 287 transitions. [2024-11-27 20:22:26,914 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 13 states have internal predecessors, (40), 4 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2024-11-27 20:22:26,914 INFO L276 IsEmpty]: Start isEmpty. Operand 241 states and 287 transitions. [2024-11-27 20:22:26,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2024-11-27 20:22:26,915 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 20:22:26,915 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 20:22:26,926 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef5e54c2-064e-4fe1-a295-d132e8d37af5/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Ended with exit code 0 [2024-11-27 20:22:27,115 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef5e54c2-064e-4fe1-a295-d132e8d37af5/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 20:22:27,116 INFO L396 AbstractCegarLoop]: === Iteration 41 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-27 20:22:27,116 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 20:22:27,116 INFO L85 PathProgramCache]: Analyzing trace with hash 922017323, now seen corresponding path program 1 times [2024-11-27 20:22:27,116 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-27 20:22:27,116 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1697326955] [2024-11-27 20:22:27,116 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 20:22:27,116 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 20:22:27,117 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef5e54c2-064e-4fe1-a295-d132e8d37af5/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 20:22:27,118 INFO L229 MonitoredProcess]: Starting monitored process 46 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef5e54c2-064e-4fe1-a295-d132e8d37af5/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 20:22:27,119 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef5e54c2-064e-4fe1-a295-d132e8d37af5/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2024-11-27 20:22:27,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 20:22:27,197 INFO L256 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 19 conjuncts are in the unsatisfiable core [2024-11-27 20:22:27,199 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 20:22:30,255 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2024-11-27 20:22:30,255 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-27 20:22:30,255 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-27 20:22:30,255 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1697326955] [2024-11-27 20:22:30,255 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1697326955] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-27 20:22:30,255 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-27 20:22:30,255 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2024-11-27 20:22:30,255 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [370022757] [2024-11-27 20:22:30,255 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-27 20:22:30,256 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-11-27 20:22:30,256 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-27 20:22:30,256 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-11-27 20:22:30,256 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2024-11-27 20:22:30,256 INFO L87 Difference]: Start difference. First operand 241 states and 287 transitions. Second operand has 13 states, 13 states have (on average 3.3076923076923075) internal successors, (43), 13 states have internal predecessors, (43), 4 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2024-11-27 20:22:36,673 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2024-11-27 20:22:40,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 20:22:40,597 INFO L93 Difference]: Finished difference Result 327 states and 395 transitions. [2024-11-27 20:22:40,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-11-27 20:22:40,598 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.3076923076923075) internal successors, (43), 13 states have internal predecessors, (43), 4 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) Word has length 64 [2024-11-27 20:22:40,598 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 20:22:40,599 INFO L225 Difference]: With dead ends: 327 [2024-11-27 20:22:40,599 INFO L226 Difference]: Without dead ends: 297 [2024-11-27 20:22:40,599 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 51 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=67, Invalid=353, Unknown=0, NotChecked=0, Total=420 [2024-11-27 20:22:40,599 INFO L435 NwaCegarLoop]: 90 mSDtfsCounter, 27 mSDsluCounter, 587 mSDsCounter, 0 mSdLazyCounter, 409 mSolverCounterSat, 4 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 677 SdHoareTripleChecker+Invalid, 414 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 409 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.8s IncrementalHoareTripleChecker+Time [2024-11-27 20:22:40,600 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [30 Valid, 677 Invalid, 414 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 409 Invalid, 1 Unknown, 0 Unchecked, 8.8s Time] [2024-11-27 20:22:40,600 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 297 states. [2024-11-27 20:22:40,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 297 to 240. [2024-11-27 20:22:40,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 240 states, 205 states have (on average 1.1609756097560975) internal successors, (238), 208 states have internal predecessors, (238), 23 states have call successors, (23), 9 states have call predecessors, (23), 11 states have return successors, (24), 23 states have call predecessors, (24), 21 states have call successors, (24) [2024-11-27 20:22:40,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 240 states to 240 states and 285 transitions. [2024-11-27 20:22:40,618 INFO L78 Accepts]: Start accepts. Automaton has 240 states and 285 transitions. Word has length 64 [2024-11-27 20:22:40,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-27 20:22:40,618 INFO L471 AbstractCegarLoop]: Abstraction has 240 states and 285 transitions. [2024-11-27 20:22:40,618 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.3076923076923075) internal successors, (43), 13 states have internal predecessors, (43), 4 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2024-11-27 20:22:40,618 INFO L276 IsEmpty]: Start isEmpty. Operand 240 states and 285 transitions. [2024-11-27 20:22:40,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2024-11-27 20:22:40,619 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 20:22:40,619 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 20:22:40,631 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef5e54c2-064e-4fe1-a295-d132e8d37af5/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Ended with exit code 0 [2024-11-27 20:22:40,819 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef5e54c2-064e-4fe1-a295-d132e8d37af5/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 20:22:40,820 INFO L396 AbstractCegarLoop]: === Iteration 42 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-27 20:22:40,820 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 20:22:40,820 INFO L85 PathProgramCache]: Analyzing trace with hash -298738180, now seen corresponding path program 1 times [2024-11-27 20:22:40,820 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-27 20:22:40,820 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1525783983] [2024-11-27 20:22:40,820 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 20:22:40,820 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 20:22:40,820 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef5e54c2-064e-4fe1-a295-d132e8d37af5/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 20:22:40,822 INFO L229 MonitoredProcess]: Starting monitored process 47 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef5e54c2-064e-4fe1-a295-d132e8d37af5/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 20:22:40,823 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef5e54c2-064e-4fe1-a295-d132e8d37af5/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2024-11-27 20:22:40,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 20:22:40,889 INFO L256 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-11-27 20:22:40,891 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 20:22:42,198 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 7 proven. 3 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-11-27 20:22:42,198 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-27 20:22:42,990 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 7 proven. 3 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-11-27 20:22:42,990 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-27 20:22:42,990 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1525783983] [2024-11-27 20:22:42,990 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1525783983] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-27 20:22:42,991 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-27 20:22:42,991 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2024-11-27 20:22:42,991 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [997178403] [2024-11-27 20:22:42,991 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-27 20:22:42,991 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-11-27 20:22:42,991 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-27 20:22:42,992 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-11-27 20:22:42,992 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2024-11-27 20:22:42,992 INFO L87 Difference]: Start difference. First operand 240 states and 285 transitions. Second operand has 10 states, 10 states have (on average 4.5) internal successors, (45), 9 states have internal predecessors, (45), 5 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) [2024-11-27 20:22:45,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 20:22:45,565 INFO L93 Difference]: Finished difference Result 314 states and 372 transitions. [2024-11-27 20:22:45,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-11-27 20:22:45,566 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.5) internal successors, (45), 9 states have internal predecessors, (45), 5 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) Word has length 65 [2024-11-27 20:22:45,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 20:22:45,567 INFO L225 Difference]: With dead ends: 314 [2024-11-27 20:22:45,567 INFO L226 Difference]: Without dead ends: 295 [2024-11-27 20:22:45,567 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 120 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=47, Invalid=193, Unknown=0, NotChecked=0, Total=240 [2024-11-27 20:22:45,568 INFO L435 NwaCegarLoop]: 90 mSDtfsCounter, 46 mSDsluCounter, 679 mSDsCounter, 0 mSdLazyCounter, 201 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 769 SdHoareTripleChecker+Invalid, 207 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 201 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2024-11-27 20:22:45,568 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [47 Valid, 769 Invalid, 207 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 201 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2024-11-27 20:22:45,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 295 states. [2024-11-27 20:22:45,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 295 to 267. [2024-11-27 20:22:45,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 267 states, 229 states have (on average 1.1528384279475983) internal successors, (264), 233 states have internal predecessors, (264), 26 states have call successors, (26), 9 states have call predecessors, (26), 11 states have return successors, (27), 26 states have call predecessors, (27), 24 states have call successors, (27) [2024-11-27 20:22:45,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 267 states to 267 states and 317 transitions. [2024-11-27 20:22:45,592 INFO L78 Accepts]: Start accepts. Automaton has 267 states and 317 transitions. Word has length 65 [2024-11-27 20:22:45,592 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-27 20:22:45,592 INFO L471 AbstractCegarLoop]: Abstraction has 267 states and 317 transitions. [2024-11-27 20:22:45,592 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.5) internal successors, (45), 9 states have internal predecessors, (45), 5 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) [2024-11-27 20:22:45,592 INFO L276 IsEmpty]: Start isEmpty. Operand 267 states and 317 transitions. [2024-11-27 20:22:45,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2024-11-27 20:22:45,593 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 20:22:45,594 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 20:22:45,604 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef5e54c2-064e-4fe1-a295-d132e8d37af5/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Ended with exit code 0 [2024-11-27 20:22:45,794 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef5e54c2-064e-4fe1-a295-d132e8d37af5/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 20:22:45,794 INFO L396 AbstractCegarLoop]: === Iteration 43 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-27 20:22:45,794 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 20:22:45,794 INFO L85 PathProgramCache]: Analyzing trace with hash 1293680078, now seen corresponding path program 1 times [2024-11-27 20:22:45,795 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-27 20:22:45,795 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1380157197] [2024-11-27 20:22:45,795 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 20:22:45,795 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 20:22:45,795 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef5e54c2-064e-4fe1-a295-d132e8d37af5/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 20:22:45,796 INFO L229 MonitoredProcess]: Starting monitored process 48 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef5e54c2-064e-4fe1-a295-d132e8d37af5/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 20:22:45,797 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef5e54c2-064e-4fe1-a295-d132e8d37af5/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2024-11-27 20:22:45,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 20:22:45,868 INFO L256 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 19 conjuncts are in the unsatisfiable core [2024-11-27 20:22:45,870 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 20:22:52,398 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2024-11-27 20:22:52,398 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-27 20:22:54,021 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-27 20:22:54,021 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1380157197] [2024-11-27 20:22:54,021 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1380157197] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-27 20:22:54,021 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [535498484] [2024-11-27 20:22:54,021 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 20:22:54,021 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-11-27 20:22:54,021 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef5e54c2-064e-4fe1-a295-d132e8d37af5/bin/uautomizer-verify-aQ6SnzHsRB/cvc4 [2024-11-27 20:22:54,024 INFO L229 MonitoredProcess]: Starting monitored process 49 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef5e54c2-064e-4fe1-a295-d132e8d37af5/bin/uautomizer-verify-aQ6SnzHsRB/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2024-11-27 20:22:54,026 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef5e54c2-064e-4fe1-a295-d132e8d37af5/bin/uautomizer-verify-aQ6SnzHsRB/cvc4 --incremental --print-success --lang smt (49)] Waiting until timeout for monitored process [2024-11-27 20:22:54,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 20:22:54,173 INFO L256 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 18 conjuncts are in the unsatisfiable core [2024-11-27 20:22:54,174 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 20:23:02,095 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2024-11-27 20:23:02,095 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-27 20:23:02,095 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [535498484] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-27 20:23:02,095 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-27 20:23:02,095 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [12] total 18 [2024-11-27 20:23:02,095 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [625863826] [2024-11-27 20:23:02,095 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-27 20:23:02,096 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-27 20:23:02,096 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-27 20:23:02,096 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-27 20:23:02,097 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=404, Unknown=0, NotChecked=0, Total=462 [2024-11-27 20:23:02,097 INFO L87 Difference]: Start difference. First operand 267 states and 317 transitions. Second operand has 11 states, 11 states have (on average 3.727272727272727) internal successors, (41), 11 states have internal predecessors, (41), 4 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2024-11-27 20:23:08,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 20:23:08,617 INFO L93 Difference]: Finished difference Result 356 states and 429 transitions. [2024-11-27 20:23:08,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-11-27 20:23:08,618 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.727272727272727) internal successors, (41), 11 states have internal predecessors, (41), 4 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) Word has length 65 [2024-11-27 20:23:08,618 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 20:23:08,620 INFO L225 Difference]: With dead ends: 356 [2024-11-27 20:23:08,620 INFO L226 Difference]: Without dead ends: 326 [2024-11-27 20:23:08,620 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 119 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 14.2s TimeCoverageRelationStatistics Valid=63, Invalid=443, Unknown=0, NotChecked=0, Total=506 [2024-11-27 20:23:08,620 INFO L435 NwaCegarLoop]: 114 mSDtfsCounter, 30 mSDsluCounter, 759 mSDsCounter, 0 mSdLazyCounter, 436 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 873 SdHoareTripleChecker+Invalid, 438 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 436 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.2s IncrementalHoareTripleChecker+Time [2024-11-27 20:23:08,621 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [35 Valid, 873 Invalid, 438 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 436 Invalid, 0 Unknown, 0 Unchecked, 6.2s Time] [2024-11-27 20:23:08,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 326 states. [2024-11-27 20:23:08,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 326 to 269. [2024-11-27 20:23:08,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 269 states, 231 states have (on average 1.1601731601731602) internal successors, (268), 235 states have internal predecessors, (268), 26 states have call successors, (26), 9 states have call predecessors, (26), 11 states have return successors, (27), 26 states have call predecessors, (27), 24 states have call successors, (27) [2024-11-27 20:23:08,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 269 states to 269 states and 321 transitions. [2024-11-27 20:23:08,645 INFO L78 Accepts]: Start accepts. Automaton has 269 states and 321 transitions. Word has length 65 [2024-11-27 20:23:08,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-27 20:23:08,645 INFO L471 AbstractCegarLoop]: Abstraction has 269 states and 321 transitions. [2024-11-27 20:23:08,645 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.727272727272727) internal successors, (41), 11 states have internal predecessors, (41), 4 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2024-11-27 20:23:08,646 INFO L276 IsEmpty]: Start isEmpty. Operand 269 states and 321 transitions. [2024-11-27 20:23:08,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2024-11-27 20:23:08,646 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 20:23:08,646 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 20:23:08,653 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef5e54c2-064e-4fe1-a295-d132e8d37af5/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Ended with exit code 0 [2024-11-27 20:23:08,849 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef5e54c2-064e-4fe1-a295-d132e8d37af5/bin/uautomizer-verify-aQ6SnzHsRB/cvc4 --incremental --print-success --lang smt (49)] Ended with exit code 0 [2024-11-27 20:23:09,047 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 48 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef5e54c2-064e-4fe1-a295-d132e8d37af5/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,49 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef5e54c2-064e-4fe1-a295-d132e8d37af5/bin/uautomizer-verify-aQ6SnzHsRB/cvc4 --incremental --print-success --lang smt [2024-11-27 20:23:09,047 INFO L396 AbstractCegarLoop]: === Iteration 44 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-27 20:23:09,047 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 20:23:09,047 INFO L85 PathProgramCache]: Analyzing trace with hash 524402232, now seen corresponding path program 1 times [2024-11-27 20:23:09,048 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-27 20:23:09,048 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1536691252] [2024-11-27 20:23:09,048 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 20:23:09,048 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 20:23:09,048 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef5e54c2-064e-4fe1-a295-d132e8d37af5/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 20:23:09,050 INFO L229 MonitoredProcess]: Starting monitored process 50 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef5e54c2-064e-4fe1-a295-d132e8d37af5/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 20:23:09,051 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef5e54c2-064e-4fe1-a295-d132e8d37af5/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2024-11-27 20:23:09,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 20:23:09,124 INFO L256 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-11-27 20:23:09,125 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 20:23:11,161 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2024-11-27 20:23:11,161 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-27 20:23:11,161 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-27 20:23:11,161 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1536691252] [2024-11-27 20:23:11,161 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1536691252] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-27 20:23:11,161 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-27 20:23:11,161 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-11-27 20:23:11,161 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [944734882] [2024-11-27 20:23:11,161 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-27 20:23:11,162 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-27 20:23:11,162 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-27 20:23:11,162 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-27 20:23:11,162 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2024-11-27 20:23:11,162 INFO L87 Difference]: Start difference. First operand 269 states and 321 transitions. Second operand has 11 states, 11 states have (on average 3.727272727272727) internal successors, (41), 11 states have internal predecessors, (41), 4 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2024-11-27 20:23:13,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 20:23:13,906 INFO L93 Difference]: Finished difference Result 308 states and 365 transitions. [2024-11-27 20:23:13,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-11-27 20:23:13,907 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.727272727272727) internal successors, (41), 11 states have internal predecessors, (41), 4 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) Word has length 65 [2024-11-27 20:23:13,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 20:23:13,908 INFO L225 Difference]: With dead ends: 308 [2024-11-27 20:23:13,908 INFO L226 Difference]: Without dead ends: 290 [2024-11-27 20:23:13,908 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2024-11-27 20:23:13,908 INFO L435 NwaCegarLoop]: 90 mSDtfsCounter, 3 mSDsluCounter, 661 mSDsCounter, 0 mSdLazyCounter, 275 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 751 SdHoareTripleChecker+Invalid, 276 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 275 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2024-11-27 20:23:13,908 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 751 Invalid, 276 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 275 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time] [2024-11-27 20:23:13,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 290 states. [2024-11-27 20:23:13,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 290 to 273. [2024-11-27 20:23:13,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 273 states, 234 states have (on average 1.1538461538461537) internal successors, (270), 238 states have internal predecessors, (270), 27 states have call successors, (27), 9 states have call predecessors, (27), 11 states have return successors, (28), 27 states have call predecessors, (28), 25 states have call successors, (28) [2024-11-27 20:23:13,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 273 states to 273 states and 325 transitions. [2024-11-27 20:23:13,939 INFO L78 Accepts]: Start accepts. Automaton has 273 states and 325 transitions. Word has length 65 [2024-11-27 20:23:13,939 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-27 20:23:13,939 INFO L471 AbstractCegarLoop]: Abstraction has 273 states and 325 transitions. [2024-11-27 20:23:13,939 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.727272727272727) internal successors, (41), 11 states have internal predecessors, (41), 4 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2024-11-27 20:23:13,940 INFO L276 IsEmpty]: Start isEmpty. Operand 273 states and 325 transitions. [2024-11-27 20:23:13,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2024-11-27 20:23:13,940 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 20:23:13,940 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 20:23:13,951 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef5e54c2-064e-4fe1-a295-d132e8d37af5/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Forceful destruction successful, exit code 0 [2024-11-27 20:23:14,141 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef5e54c2-064e-4fe1-a295-d132e8d37af5/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 20:23:14,141 INFO L396 AbstractCegarLoop]: === Iteration 45 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-27 20:23:14,141 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 20:23:14,141 INFO L85 PathProgramCache]: Analyzing trace with hash 784206988, now seen corresponding path program 1 times [2024-11-27 20:23:14,141 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-27 20:23:14,141 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [701513896] [2024-11-27 20:23:14,141 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 20:23:14,142 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 20:23:14,142 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef5e54c2-064e-4fe1-a295-d132e8d37af5/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 20:23:14,143 INFO L229 MonitoredProcess]: Starting monitored process 51 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef5e54c2-064e-4fe1-a295-d132e8d37af5/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 20:23:14,145 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef5e54c2-064e-4fe1-a295-d132e8d37af5/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Waiting until timeout for monitored process [2024-11-27 20:23:14,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 20:23:14,213 INFO L256 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 11 conjuncts are in the unsatisfiable core [2024-11-27 20:23:14,215 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 20:23:15,613 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2024-11-27 20:23:15,613 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-27 20:23:15,614 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-27 20:23:15,614 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [701513896] [2024-11-27 20:23:15,614 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [701513896] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-27 20:23:15,614 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-27 20:23:15,614 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-11-27 20:23:15,614 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [626716987] [2024-11-27 20:23:15,614 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-27 20:23:15,614 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-27 20:23:15,614 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-27 20:23:15,615 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-27 20:23:15,615 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2024-11-27 20:23:15,615 INFO L87 Difference]: Start difference. First operand 273 states and 325 transitions. Second operand has 8 states, 8 states have (on average 5.125) internal successors, (41), 8 states have internal predecessors, (41), 4 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2024-11-27 20:23:18,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 20:23:18,346 INFO L93 Difference]: Finished difference Result 332 states and 394 transitions. [2024-11-27 20:23:18,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-27 20:23:18,347 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.125) internal successors, (41), 8 states have internal predecessors, (41), 4 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) Word has length 65 [2024-11-27 20:23:18,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 20:23:18,348 INFO L225 Difference]: With dead ends: 332 [2024-11-27 20:23:18,348 INFO L226 Difference]: Without dead ends: 302 [2024-11-27 20:23:18,349 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2024-11-27 20:23:18,349 INFO L435 NwaCegarLoop]: 104 mSDtfsCounter, 29 mSDsluCounter, 487 mSDsCounter, 0 mSdLazyCounter, 236 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 591 SdHoareTripleChecker+Invalid, 242 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 236 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2024-11-27 20:23:18,349 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 591 Invalid, 242 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 236 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2024-11-27 20:23:18,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 302 states. [2024-11-27 20:23:18,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 302 to 249. [2024-11-27 20:23:18,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 249 states, 214 states have (on average 1.1261682242990654) internal successors, (241), 218 states have internal predecessors, (241), 23 states have call successors, (23), 9 states have call predecessors, (23), 11 states have return successors, (24), 23 states have call predecessors, (24), 21 states have call successors, (24) [2024-11-27 20:23:18,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 249 states to 249 states and 288 transitions. [2024-11-27 20:23:18,383 INFO L78 Accepts]: Start accepts. Automaton has 249 states and 288 transitions. Word has length 65 [2024-11-27 20:23:18,383 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-27 20:23:18,384 INFO L471 AbstractCegarLoop]: Abstraction has 249 states and 288 transitions. [2024-11-27 20:23:18,384 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.125) internal successors, (41), 8 states have internal predecessors, (41), 4 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2024-11-27 20:23:18,384 INFO L276 IsEmpty]: Start isEmpty. Operand 249 states and 288 transitions. [2024-11-27 20:23:18,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2024-11-27 20:23:18,384 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 20:23:18,385 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 20:23:18,395 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef5e54c2-064e-4fe1-a295-d132e8d37af5/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Ended with exit code 0 [2024-11-27 20:23:18,585 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef5e54c2-064e-4fe1-a295-d132e8d37af5/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 20:23:18,585 INFO L396 AbstractCegarLoop]: === Iteration 46 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-27 20:23:18,585 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 20:23:18,586 INFO L85 PathProgramCache]: Analyzing trace with hash -242886238, now seen corresponding path program 1 times [2024-11-27 20:23:18,586 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-27 20:23:18,586 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1434501790] [2024-11-27 20:23:18,586 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 20:23:18,586 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 20:23:18,586 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef5e54c2-064e-4fe1-a295-d132e8d37af5/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 20:23:18,588 INFO L229 MonitoredProcess]: Starting monitored process 52 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef5e54c2-064e-4fe1-a295-d132e8d37af5/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 20:23:18,589 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef5e54c2-064e-4fe1-a295-d132e8d37af5/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Waiting until timeout for monitored process [2024-11-27 20:23:18,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 20:23:18,655 INFO L256 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-11-27 20:23:18,656 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 20:23:18,965 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2024-11-27 20:23:18,965 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-27 20:23:18,965 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-27 20:23:18,965 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1434501790] [2024-11-27 20:23:18,965 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1434501790] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-27 20:23:18,965 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-27 20:23:18,965 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-11-27 20:23:18,965 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [616304893] [2024-11-27 20:23:18,965 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-27 20:23:18,966 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-27 20:23:18,966 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-27 20:23:18,966 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-27 20:23:18,966 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-27 20:23:18,966 INFO L87 Difference]: Start difference. First operand 249 states and 288 transitions. Second operand has 6 states, 5 states have (on average 9.0) internal successors, (45), 5 states have internal predecessors, (45), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2024-11-27 20:23:19,429 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 20:23:19,429 INFO L93 Difference]: Finished difference Result 279 states and 320 transitions. [2024-11-27 20:23:19,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-27 20:23:19,430 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 9.0) internal successors, (45), 5 states have internal predecessors, (45), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) Word has length 67 [2024-11-27 20:23:19,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 20:23:19,431 INFO L225 Difference]: With dead ends: 279 [2024-11-27 20:23:19,431 INFO L226 Difference]: Without dead ends: 265 [2024-11-27 20:23:19,431 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-11-27 20:23:19,431 INFO L435 NwaCegarLoop]: 103 mSDtfsCounter, 14 mSDsluCounter, 382 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 485 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-27 20:23:19,432 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 485 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-27 20:23:19,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 265 states. [2024-11-27 20:23:19,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 265 to 216. [2024-11-27 20:23:19,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 216 states, 182 states have (on average 1.1318681318681318) internal successors, (206), 189 states have internal predecessors, (206), 22 states have call successors, (22), 9 states have call predecessors, (22), 11 states have return successors, (23), 19 states have call predecessors, (23), 20 states have call successors, (23) [2024-11-27 20:23:19,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 251 transitions. [2024-11-27 20:23:19,450 INFO L78 Accepts]: Start accepts. Automaton has 216 states and 251 transitions. Word has length 67 [2024-11-27 20:23:19,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-27 20:23:19,450 INFO L471 AbstractCegarLoop]: Abstraction has 216 states and 251 transitions. [2024-11-27 20:23:19,450 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 9.0) internal successors, (45), 5 states have internal predecessors, (45), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2024-11-27 20:23:19,450 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states and 251 transitions. [2024-11-27 20:23:19,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2024-11-27 20:23:19,450 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 20:23:19,450 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 20:23:19,457 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef5e54c2-064e-4fe1-a295-d132e8d37af5/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Ended with exit code 0 [2024-11-27 20:23:19,651 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef5e54c2-064e-4fe1-a295-d132e8d37af5/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 20:23:19,651 INFO L396 AbstractCegarLoop]: === Iteration 47 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-27 20:23:19,651 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 20:23:19,651 INFO L85 PathProgramCache]: Analyzing trace with hash 1719764324, now seen corresponding path program 1 times [2024-11-27 20:23:19,652 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-27 20:23:19,652 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1134384692] [2024-11-27 20:23:19,652 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 20:23:19,652 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 20:23:19,652 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef5e54c2-064e-4fe1-a295-d132e8d37af5/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 20:23:19,653 INFO L229 MonitoredProcess]: Starting monitored process 53 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef5e54c2-064e-4fe1-a295-d132e8d37af5/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 20:23:19,654 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef5e54c2-064e-4fe1-a295-d132e8d37af5/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Waiting until timeout for monitored process [2024-11-27 20:23:19,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 20:23:19,725 INFO L256 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-11-27 20:23:19,726 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 20:23:20,032 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2024-11-27 20:23:20,032 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-27 20:23:20,032 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-27 20:23:20,032 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1134384692] [2024-11-27 20:23:20,032 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1134384692] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-27 20:23:20,032 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-27 20:23:20,032 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-11-27 20:23:20,032 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2090801997] [2024-11-27 20:23:20,032 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-27 20:23:20,033 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-27 20:23:20,033 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-27 20:23:20,033 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-27 20:23:20,033 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-27 20:23:20,033 INFO L87 Difference]: Start difference. First operand 216 states and 251 transitions. Second operand has 6 states, 5 states have (on average 9.0) internal successors, (45), 5 states have internal predecessors, (45), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2024-11-27 20:23:20,407 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 20:23:20,407 INFO L93 Difference]: Finished difference Result 241 states and 277 transitions. [2024-11-27 20:23:20,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-27 20:23:20,407 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 9.0) internal successors, (45), 5 states have internal predecessors, (45), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) Word has length 67 [2024-11-27 20:23:20,408 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 20:23:20,408 INFO L225 Difference]: With dead ends: 241 [2024-11-27 20:23:20,408 INFO L226 Difference]: Without dead ends: 162 [2024-11-27 20:23:20,409 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-11-27 20:23:20,409 INFO L435 NwaCegarLoop]: 101 mSDtfsCounter, 14 mSDsluCounter, 377 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 478 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-27 20:23:20,409 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 478 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-27 20:23:20,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2024-11-27 20:23:20,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 130. [2024-11-27 20:23:20,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 130 states, 109 states have (on average 1.165137614678899) internal successors, (127), 114 states have internal predecessors, (127), 13 states have call successors, (13), 6 states have call predecessors, (13), 7 states have return successors, (12), 11 states have call predecessors, (12), 12 states have call successors, (12) [2024-11-27 20:23:20,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 152 transitions. [2024-11-27 20:23:20,426 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 152 transitions. Word has length 67 [2024-11-27 20:23:20,426 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-27 20:23:20,426 INFO L471 AbstractCegarLoop]: Abstraction has 130 states and 152 transitions. [2024-11-27 20:23:20,427 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 9.0) internal successors, (45), 5 states have internal predecessors, (45), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2024-11-27 20:23:20,427 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 152 transitions. [2024-11-27 20:23:20,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2024-11-27 20:23:20,427 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 20:23:20,427 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 20:23:20,440 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef5e54c2-064e-4fe1-a295-d132e8d37af5/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Ended with exit code 0 [2024-11-27 20:23:20,628 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef5e54c2-064e-4fe1-a295-d132e8d37af5/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 20:23:20,628 INFO L396 AbstractCegarLoop]: === Iteration 48 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-27 20:23:20,628 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 20:23:20,628 INFO L85 PathProgramCache]: Analyzing trace with hash -626934387, now seen corresponding path program 1 times [2024-11-27 20:23:20,629 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-27 20:23:20,629 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2075023036] [2024-11-27 20:23:20,629 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 20:23:20,629 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 20:23:20,629 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef5e54c2-064e-4fe1-a295-d132e8d37af5/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 20:23:20,630 INFO L229 MonitoredProcess]: Starting monitored process 54 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef5e54c2-064e-4fe1-a295-d132e8d37af5/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 20:23:20,631 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef5e54c2-064e-4fe1-a295-d132e8d37af5/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Waiting until timeout for monitored process [2024-11-27 20:23:20,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 20:23:20,699 INFO L256 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-11-27 20:23:20,700 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 20:23:21,582 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2024-11-27 20:23:21,582 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-27 20:23:22,281 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-27 20:23:22,281 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-27 20:23:22,281 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2075023036] [2024-11-27 20:23:22,281 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2075023036] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-27 20:23:22,281 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-27 20:23:22,282 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2024-11-27 20:23:22,282 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1088194718] [2024-11-27 20:23:22,282 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-27 20:23:22,282 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-11-27 20:23:22,282 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-27 20:23:22,283 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-11-27 20:23:22,283 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2024-11-27 20:23:22,283 INFO L87 Difference]: Start difference. First operand 130 states and 152 transitions. Second operand has 9 states, 9 states have (on average 5.666666666666667) internal successors, (51), 8 states have internal predecessors, (51), 3 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2024-11-27 20:23:23,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 20:23:23,570 INFO L93 Difference]: Finished difference Result 159 states and 179 transitions. [2024-11-27 20:23:23,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-11-27 20:23:23,571 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.666666666666667) internal successors, (51), 8 states have internal predecessors, (51), 3 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) Word has length 66 [2024-11-27 20:23:23,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 20:23:23,572 INFO L225 Difference]: With dead ends: 159 [2024-11-27 20:23:23,572 INFO L226 Difference]: Without dead ends: 106 [2024-11-27 20:23:23,572 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 121 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2024-11-27 20:23:23,572 INFO L435 NwaCegarLoop]: 79 mSDtfsCounter, 8 mSDsluCounter, 522 mSDsCounter, 0 mSdLazyCounter, 101 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 601 SdHoareTripleChecker+Invalid, 102 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 101 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2024-11-27 20:23:23,573 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 601 Invalid, 102 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 101 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2024-11-27 20:23:23,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2024-11-27 20:23:23,584 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 106. [2024-11-27 20:23:23,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 87 states have (on average 1.160919540229885) internal successors, (101), 92 states have internal predecessors, (101), 11 states have call successors, (11), 6 states have call predecessors, (11), 7 states have return successors, (10), 9 states have call predecessors, (10), 10 states have call successors, (10) [2024-11-27 20:23:23,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 122 transitions. [2024-11-27 20:23:23,585 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 122 transitions. Word has length 66 [2024-11-27 20:23:23,585 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-27 20:23:23,585 INFO L471 AbstractCegarLoop]: Abstraction has 106 states and 122 transitions. [2024-11-27 20:23:23,586 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 5.666666666666667) internal successors, (51), 8 states have internal predecessors, (51), 3 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2024-11-27 20:23:23,586 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 122 transitions. [2024-11-27 20:23:23,586 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2024-11-27 20:23:23,586 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 20:23:23,586 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 20:23:23,593 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef5e54c2-064e-4fe1-a295-d132e8d37af5/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Forceful destruction successful, exit code 0 [2024-11-27 20:23:23,787 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef5e54c2-064e-4fe1-a295-d132e8d37af5/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 20:23:23,787 INFO L396 AbstractCegarLoop]: === Iteration 49 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-27 20:23:23,787 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 20:23:23,787 INFO L85 PathProgramCache]: Analyzing trace with hash -1229804565, now seen corresponding path program 1 times [2024-11-27 20:23:23,787 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-27 20:23:23,787 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [359714266] [2024-11-27 20:23:23,787 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 20:23:23,787 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 20:23:23,788 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef5e54c2-064e-4fe1-a295-d132e8d37af5/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 20:23:23,789 INFO L229 MonitoredProcess]: Starting monitored process 55 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef5e54c2-064e-4fe1-a295-d132e8d37af5/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 20:23:23,790 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef5e54c2-064e-4fe1-a295-d132e8d37af5/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Waiting until timeout for monitored process [2024-11-27 20:23:23,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 20:23:23,863 INFO L256 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-11-27 20:23:23,864 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 20:23:24,243 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2024-11-27 20:23:24,243 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-27 20:23:24,243 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-27 20:23:24,243 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [359714266] [2024-11-27 20:23:24,243 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [359714266] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-27 20:23:24,243 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-27 20:23:24,243 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-27 20:23:24,243 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1451970966] [2024-11-27 20:23:24,243 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-27 20:23:24,244 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-27 20:23:24,244 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-27 20:23:24,244 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-27 20:23:24,244 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-27 20:23:24,244 INFO L87 Difference]: Start difference. First operand 106 states and 122 transitions. Second operand has 4 states, 4 states have (on average 12.25) internal successors, (49), 4 states have internal predecessors, (49), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-11-27 20:23:24,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 20:23:24,305 INFO L93 Difference]: Finished difference Result 116 states and 131 transitions. [2024-11-27 20:23:24,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-27 20:23:24,306 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 12.25) internal successors, (49), 4 states have internal predecessors, (49), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 68 [2024-11-27 20:23:24,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 20:23:24,307 INFO L225 Difference]: With dead ends: 116 [2024-11-27 20:23:24,307 INFO L226 Difference]: Without dead ends: 67 [2024-11-27 20:23:24,308 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 65 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 20:23:24,308 INFO L435 NwaCegarLoop]: 69 mSDtfsCounter, 13 mSDsluCounter, 106 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 175 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-27 20:23:24,308 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 175 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-27 20:23:24,309 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2024-11-27 20:23:24,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 67. [2024-11-27 20:23:24,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 54 states have (on average 1.1111111111111112) internal successors, (60), 55 states have internal predecessors, (60), 7 states have call successors, (7), 5 states have call predecessors, (7), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2024-11-27 20:23:24,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 73 transitions. [2024-11-27 20:23:24,316 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 73 transitions. Word has length 68 [2024-11-27 20:23:24,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-27 20:23:24,316 INFO L471 AbstractCegarLoop]: Abstraction has 67 states and 73 transitions. [2024-11-27 20:23:24,316 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.25) internal successors, (49), 4 states have internal predecessors, (49), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-11-27 20:23:24,316 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 73 transitions. [2024-11-27 20:23:24,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2024-11-27 20:23:24,316 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 20:23:24,317 INFO L218 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 20:23:24,326 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef5e54c2-064e-4fe1-a295-d132e8d37af5/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Ended with exit code 0 [2024-11-27 20:23:24,517 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef5e54c2-064e-4fe1-a295-d132e8d37af5/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 20:23:24,517 INFO L396 AbstractCegarLoop]: === Iteration 50 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-27 20:23:24,517 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 20:23:24,517 INFO L85 PathProgramCache]: Analyzing trace with hash -2089156486, now seen corresponding path program 1 times [2024-11-27 20:23:24,518 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-27 20:23:24,518 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [486458352] [2024-11-27 20:23:24,518 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 20:23:24,518 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 20:23:24,518 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef5e54c2-064e-4fe1-a295-d132e8d37af5/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 20:23:24,519 INFO L229 MonitoredProcess]: Starting monitored process 56 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef5e54c2-064e-4fe1-a295-d132e8d37af5/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 20:23:24,521 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef5e54c2-064e-4fe1-a295-d132e8d37af5/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Waiting until timeout for monitored process [2024-11-27 20:23:24,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 20:23:24,618 INFO L256 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 20 conjuncts are in the unsatisfiable core [2024-11-27 20:23:24,619 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 20:23:28,272 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 9 proven. 3 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-11-27 20:23:28,273 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-27 20:23:32,242 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-27 20:23:32,242 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [486458352] [2024-11-27 20:23:32,242 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [486458352] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-27 20:23:32,242 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [540569433] [2024-11-27 20:23:32,242 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 20:23:32,242 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-11-27 20:23:32,242 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef5e54c2-064e-4fe1-a295-d132e8d37af5/bin/uautomizer-verify-aQ6SnzHsRB/cvc4 [2024-11-27 20:23:32,244 INFO L229 MonitoredProcess]: Starting monitored process 57 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef5e54c2-064e-4fe1-a295-d132e8d37af5/bin/uautomizer-verify-aQ6SnzHsRB/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2024-11-27 20:23:32,245 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef5e54c2-064e-4fe1-a295-d132e8d37af5/bin/uautomizer-verify-aQ6SnzHsRB/cvc4 --incremental --print-success --lang smt (57)] Waiting until timeout for monitored process [2024-11-27 20:23:32,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 20:23:32,405 INFO L256 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-11-27 20:23:32,406 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 20:23:36,381 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-11-27 20:23:36,381 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-27 20:23:36,381 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [540569433] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-27 20:23:36,381 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-27 20:23:36,381 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [14] total 19 [2024-11-27 20:23:36,381 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1696682403] [2024-11-27 20:23:36,381 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-27 20:23:36,382 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-11-27 20:23:36,382 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-27 20:23:36,382 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-11-27 20:23:36,382 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=654, Unknown=0, NotChecked=0, Total=756 [2024-11-27 20:23:36,382 INFO L87 Difference]: Start difference. First operand 67 states and 73 transitions. Second operand has 12 states, 12 states have (on average 3.5833333333333335) internal successors, (43), 12 states have internal predecessors, (43), 5 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2024-11-27 20:23:40,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 20:23:40,628 INFO L93 Difference]: Finished difference Result 95 states and 105 transitions. [2024-11-27 20:23:40,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-11-27 20:23:40,629 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.5833333333333335) internal successors, (43), 12 states have internal predecessors, (43), 5 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) Word has length 72 [2024-11-27 20:23:40,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 20:23:40,630 INFO L225 Difference]: With dead ends: 95 [2024-11-27 20:23:40,630 INFO L226 Difference]: Without dead ends: 79 [2024-11-27 20:23:40,630 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 142 SyntacticMatches, 3 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 234 ImplicationChecksByTransitivity, 10.1s TimeCoverageRelationStatistics Valid=170, Invalid=1020, Unknown=0, NotChecked=0, Total=1190 [2024-11-27 20:23:40,631 INFO L435 NwaCegarLoop]: 70 mSDtfsCounter, 14 mSDsluCounter, 344 mSDsCounter, 0 mSdLazyCounter, 162 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 414 SdHoareTripleChecker+Invalid, 164 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 162 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2024-11-27 20:23:40,631 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 414 Invalid, 164 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 162 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2024-11-27 20:23:40,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2024-11-27 20:23:40,640 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 74. [2024-11-27 20:23:40,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 60 states have (on average 1.1) internal successors, (66), 61 states have internal predecessors, (66), 8 states have call successors, (8), 5 states have call predecessors, (8), 5 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2024-11-27 20:23:40,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 81 transitions. [2024-11-27 20:23:40,640 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 81 transitions. Word has length 72 [2024-11-27 20:23:40,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-27 20:23:40,641 INFO L471 AbstractCegarLoop]: Abstraction has 74 states and 81 transitions. [2024-11-27 20:23:40,641 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.5833333333333335) internal successors, (43), 12 states have internal predecessors, (43), 5 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2024-11-27 20:23:40,641 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 81 transitions. [2024-11-27 20:23:40,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2024-11-27 20:23:40,641 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 20:23:40,641 INFO L218 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 20:23:40,648 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef5e54c2-064e-4fe1-a295-d132e8d37af5/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Forceful destruction successful, exit code 0 [2024-11-27 20:23:40,844 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef5e54c2-064e-4fe1-a295-d132e8d37af5/bin/uautomizer-verify-aQ6SnzHsRB/cvc4 --incremental --print-success --lang smt (57)] Ended with exit code 0 [2024-11-27 20:23:41,042 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 56 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef5e54c2-064e-4fe1-a295-d132e8d37af5/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,57 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef5e54c2-064e-4fe1-a295-d132e8d37af5/bin/uautomizer-verify-aQ6SnzHsRB/cvc4 --incremental --print-success --lang smt [2024-11-27 20:23:41,042 INFO L396 AbstractCegarLoop]: === Iteration 51 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-27 20:23:41,042 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 20:23:41,042 INFO L85 PathProgramCache]: Analyzing trace with hash 1361805308, now seen corresponding path program 1 times [2024-11-27 20:23:41,043 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-27 20:23:41,043 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1027723670] [2024-11-27 20:23:41,043 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 20:23:41,043 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 20:23:41,043 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef5e54c2-064e-4fe1-a295-d132e8d37af5/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 20:23:41,046 INFO L229 MonitoredProcess]: Starting monitored process 58 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef5e54c2-064e-4fe1-a295-d132e8d37af5/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 20:23:41,047 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef5e54c2-064e-4fe1-a295-d132e8d37af5/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Waiting until timeout for monitored process [2024-11-27 20:23:41,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 20:23:41,132 INFO L256 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 21 conjuncts are in the unsatisfiable core [2024-11-27 20:23:41,134 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 20:23:45,424 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-11-27 20:23:45,424 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-27 20:23:45,424 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-27 20:23:45,424 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1027723670] [2024-11-27 20:23:45,424 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1027723670] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-27 20:23:45,424 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-27 20:23:45,424 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2024-11-27 20:23:45,424 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [493447499] [2024-11-27 20:23:45,424 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-27 20:23:45,425 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-11-27 20:23:45,425 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-27 20:23:45,425 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-11-27 20:23:45,425 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=154, Unknown=0, NotChecked=0, Total=182 [2024-11-27 20:23:45,425 INFO L87 Difference]: Start difference. First operand 74 states and 81 transitions. Second operand has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 14 states have internal predecessors, (43), 5 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6)