./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/combinations/square_8+soft_float_4-2a.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_6dce12f9-b7f9-4583-bc8d-da617b5b33ec/bin/uautomizer-verify-aQ6SnzHsRB/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dce12f9-b7f9-4583-bc8d-da617b5b33ec/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_6dce12f9-b7f9-4583-bc8d-da617b5b33ec/bin/uautomizer-verify-aQ6SnzHsRB/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dce12f9-b7f9-4583-bc8d-da617b5b33ec/bin/uautomizer-verify-aQ6SnzHsRB/config/AutomizerReach.xml -i ../../sv-benchmarks/c/combinations/square_8+soft_float_4-2a.c.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dce12f9-b7f9-4583-bc8d-da617b5b33ec/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_6dce12f9-b7f9-4583-bc8d-da617b5b33ec/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 2e745a133311e60f1a9e202bf4fcb9b524a944d790f4c1df2987f4b8dfd5e08b --- Real Ultimate output --- This is Ultimate 0.3.0-dev-d790fec [2024-11-28 03:45:45,041 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-28 03:45:45,152 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dce12f9-b7f9-4583-bc8d-da617b5b33ec/bin/uautomizer-verify-aQ6SnzHsRB/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-11-28 03:45:45,163 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-28 03:45:45,168 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-28 03:45:45,219 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-28 03:45:45,222 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-28 03:45:45,222 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-28 03:45:45,223 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-28 03:45:45,224 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-28 03:45:45,225 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-28 03:45:45,225 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-28 03:45:45,226 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-28 03:45:45,226 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-28 03:45:45,226 INFO L153 SettingsManager]: * Use SBE=true [2024-11-28 03:45:45,227 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-28 03:45:45,227 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-28 03:45:45,228 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-28 03:45:45,228 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-28 03:45:45,228 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-28 03:45:45,228 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-28 03:45:45,229 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-28 03:45:45,229 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-28 03:45:45,229 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-28 03:45:45,229 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-28 03:45:45,229 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-28 03:45:45,229 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2024-11-28 03:45:45,229 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-28 03:45:45,230 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2024-11-28 03:45:45,230 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-28 03:45:45,230 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-28 03:45:45,230 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-28 03:45:45,230 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-28 03:45:45,232 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-28 03:45:45,232 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-28 03:45:45,232 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-28 03:45:45,232 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-28 03:45:45,232 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-28 03:45:45,233 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-28 03:45:45,233 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-28 03:45:45,233 INFO L153 SettingsManager]: * Compute procedure contracts=false [2024-11-28 03:45:45,233 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-28 03:45:45,233 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-28 03:45:45,233 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-28 03:45:45,233 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-28 03:45:45,233 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-28 03:45:45,233 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-28 03:45:45,234 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-28 03:45:45,234 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_6dce12f9-b7f9-4583-bc8d-da617b5b33ec/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 -> 2e745a133311e60f1a9e202bf4fcb9b524a944d790f4c1df2987f4b8dfd5e08b [2024-11-28 03:45:45,619 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-28 03:45:45,630 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-28 03:45:45,634 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-28 03:45:45,635 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-28 03:45:45,636 INFO L274 PluginConnector]: CDTParser initialized [2024-11-28 03:45:45,637 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dce12f9-b7f9-4583-bc8d-da617b5b33ec/bin/uautomizer-verify-aQ6SnzHsRB/../../sv-benchmarks/c/combinations/square_8+soft_float_4-2a.c.cil.c [2024-11-28 03:45:49,279 INFO L533 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dce12f9-b7f9-4583-bc8d-da617b5b33ec/bin/uautomizer-verify-aQ6SnzHsRB/data/f08600ec3/26489c4fe3134bc69de5bb46b311ac53/FLAG988899416 [2024-11-28 03:45:49,777 INFO L384 CDTParser]: Found 1 translation units. [2024-11-28 03:45:49,778 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dce12f9-b7f9-4583-bc8d-da617b5b33ec/sv-benchmarks/c/combinations/square_8+soft_float_4-2a.c.cil.c [2024-11-28 03:45:49,794 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dce12f9-b7f9-4583-bc8d-da617b5b33ec/bin/uautomizer-verify-aQ6SnzHsRB/data/f08600ec3/26489c4fe3134bc69de5bb46b311ac53/FLAG988899416 [2024-11-28 03:45:49,826 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dce12f9-b7f9-4583-bc8d-da617b5b33ec/bin/uautomizer-verify-aQ6SnzHsRB/data/f08600ec3/26489c4fe3134bc69de5bb46b311ac53 [2024-11-28 03:45:49,832 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-28 03:45:49,834 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-28 03:45:49,836 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-28 03:45:49,837 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-28 03:45:49,842 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-28 03:45:49,843 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 03:45:49" (1/1) ... [2024-11-28 03:45:49,847 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@55c25b1d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:45:49, skipping insertion in model container [2024-11-28 03:45:49,847 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 03:45:49" (1/1) ... [2024-11-28 03:45:49,886 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-28 03:45:50,129 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_6dce12f9-b7f9-4583-bc8d-da617b5b33ec/sv-benchmarks/c/combinations/square_8+soft_float_4-2a.c.cil.c[1995,2008] [2024-11-28 03:45:50,138 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_6dce12f9-b7f9-4583-bc8d-da617b5b33ec/sv-benchmarks/c/combinations/square_8+soft_float_4-2a.c.cil.c[2389,2402] [2024-11-28 03:45:50,218 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-28 03:45:50,233 INFO L200 MainTranslator]: Completed pre-run [2024-11-28 03:45:50,258 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_6dce12f9-b7f9-4583-bc8d-da617b5b33ec/sv-benchmarks/c/combinations/square_8+soft_float_4-2a.c.cil.c[1995,2008] [2024-11-28 03:45:50,259 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_6dce12f9-b7f9-4583-bc8d-da617b5b33ec/sv-benchmarks/c/combinations/square_8+soft_float_4-2a.c.cil.c[2389,2402] [2024-11-28 03:45:50,297 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-28 03:45:50,329 INFO L204 MainTranslator]: Completed translation [2024-11-28 03:45:50,331 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:45:50 WrapperNode [2024-11-28 03:45:50,331 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-28 03:45:50,332 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-28 03:45:50,333 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-28 03:45:50,334 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-28 03:45:50,346 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:45:50" (1/1) ... [2024-11-28 03:45:50,369 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:45:50" (1/1) ... [2024-11-28 03:45:50,403 INFO L138 Inliner]: procedures = 27, calls = 19, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 77 [2024-11-28 03:45:50,404 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-28 03:45:50,408 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-28 03:45:50,408 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-28 03:45:50,408 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-28 03:45:50,420 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:45:50" (1/1) ... [2024-11-28 03:45:50,420 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:45:50" (1/1) ... [2024-11-28 03:45:50,427 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:45:50" (1/1) ... [2024-11-28 03:45:50,449 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2024-11-28 03:45:50,450 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:45:50" (1/1) ... [2024-11-28 03:45:50,450 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:45:50" (1/1) ... [2024-11-28 03:45:50,458 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:45:50" (1/1) ... [2024-11-28 03:45:50,459 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:45:50" (1/1) ... [2024-11-28 03:45:50,465 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:45:50" (1/1) ... [2024-11-28 03:45:50,467 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:45:50" (1/1) ... [2024-11-28 03:45:50,468 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:45:50" (1/1) ... [2024-11-28 03:45:50,471 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-28 03:45:50,472 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-28 03:45:50,473 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-28 03:45:50,473 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-28 03:45:50,474 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:45:50" (1/1) ... [2024-11-28 03:45:50,481 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-28 03:45:50,499 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dce12f9-b7f9-4583-bc8d-da617b5b33ec/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:45:50,518 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dce12f9-b7f9-4583-bc8d-da617b5b33ec/bin/uautomizer-verify-aQ6SnzHsRB/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-11-28 03:45:50,522 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dce12f9-b7f9-4583-bc8d-da617b5b33ec/bin/uautomizer-verify-aQ6SnzHsRB/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-11-28 03:45:50,547 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-28 03:45:50,547 INFO L130 BoogieDeclarations]: Found specification of procedure base2flt [2024-11-28 03:45:50,547 INFO L138 BoogieDeclarations]: Found implementation of procedure base2flt [2024-11-28 03:45:50,547 INFO L130 BoogieDeclarations]: Found specification of procedure addflt [2024-11-28 03:45:50,547 INFO L138 BoogieDeclarations]: Found implementation of procedure addflt [2024-11-28 03:45:50,548 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-28 03:45:50,548 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-28 03:45:50,548 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-28 03:45:50,548 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2024-11-28 03:45:50,548 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2024-11-28 03:45:50,636 INFO L234 CfgBuilder]: Building ICFG [2024-11-28 03:45:50,639 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-28 03:45:51,286 INFO L? ?]: Removed 60 outVars from TransFormulas that were not future-live. [2024-11-28 03:45:51,286 INFO L283 CfgBuilder]: Performing block encoding [2024-11-28 03:45:51,309 INFO L307 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-28 03:45:51,312 INFO L312 CfgBuilder]: Removed 4 assume(true) statements. [2024-11-28 03:45:51,314 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 03:45:51 BoogieIcfgContainer [2024-11-28 03:45:51,314 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-28 03:45:51,317 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-28 03:45:51,317 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-28 03:45:51,324 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-28 03:45:51,325 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.11 03:45:49" (1/3) ... [2024-11-28 03:45:51,327 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1336e139 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 03:45:51, skipping insertion in model container [2024-11-28 03:45:51,327 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:45:50" (2/3) ... [2024-11-28 03:45:51,329 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1336e139 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 03:45:51, skipping insertion in model container [2024-11-28 03:45:51,329 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 03:45:51" (3/3) ... [2024-11-28 03:45:51,331 INFO L128 eAbstractionObserver]: Analyzing ICFG square_8+soft_float_4-2a.c.cil.c [2024-11-28 03:45:51,353 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-28 03:45:51,355 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG square_8+soft_float_4-2a.c.cil.c that has 4 procedures, 85 locations, 1 initial locations, 2 loop locations, and 2 error locations. [2024-11-28 03:45:51,458 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-28 03:45:51,480 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;@38474bb3, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-28 03:45:51,481 INFO L334 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2024-11-28 03:45:51,487 INFO L276 IsEmpty]: Start isEmpty. Operand has 85 states, 71 states have (on average 1.5211267605633803) internal successors, (108), 73 states have internal predecessors, (108), 8 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2024-11-28 03:45:51,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2024-11-28 03:45:51,495 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 03:45:51,496 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:45:51,497 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 03:45:51,504 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:45:51,505 INFO L85 PathProgramCache]: Analyzing trace with hash 1530844763, now seen corresponding path program 1 times [2024-11-28 03:45:51,520 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:45:51,520 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1926339335] [2024-11-28 03:45:51,522 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 03:45:51,523 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:45:51,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:45:51,705 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:45:51,706 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:45:51,710 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1926339335] [2024-11-28 03:45:51,711 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1926339335] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 03:45:51,712 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 03:45:51,712 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-28 03:45:51,717 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [251256290] [2024-11-28 03:45:51,718 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 03:45:51,724 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-11-28 03:45:51,724 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:45:51,751 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-11-28 03:45:51,752 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-11-28 03:45:51,756 INFO L87 Difference]: Start difference. First operand has 85 states, 71 states have (on average 1.5211267605633803) internal successors, (108), 73 states have internal predecessors, (108), 8 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) Second operand has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:45:51,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 03:45:51,809 INFO L93 Difference]: Finished difference Result 165 states and 248 transitions. [2024-11-28 03:45:51,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-11-28 03:45:51,811 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2024-11-28 03:45:51,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 03:45:51,821 INFO L225 Difference]: With dead ends: 165 [2024-11-28 03:45:51,821 INFO L226 Difference]: Without dead ends: 78 [2024-11-28 03:45:51,826 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-11-28 03:45:51,830 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 [2024-11-28 03:45:51,831 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] [2024-11-28 03:45:51,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2024-11-28 03:45:51,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 78. [2024-11-28 03:45:51,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 65 states have (on average 1.4) internal successors, (91), 67 states have internal predecessors, (91), 8 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2024-11-28 03:45:51,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 106 transitions. [2024-11-28 03:45:51,884 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 106 transitions. Word has length 7 [2024-11-28 03:45:51,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 03:45:51,884 INFO L471 AbstractCegarLoop]: Abstraction has 78 states and 106 transitions. [2024-11-28 03:45:51,885 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:45:51,885 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 106 transitions. [2024-11-28 03:45:51,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2024-11-28 03:45:51,885 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 03:45:51,886 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:45:51,886 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-28 03:45:51,886 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 03:45:51,887 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:45:51,887 INFO L85 PathProgramCache]: Analyzing trace with hash 1530904345, now seen corresponding path program 1 times [2024-11-28 03:45:51,887 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:45:51,887 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [915121661] [2024-11-28 03:45:51,888 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 03:45:51,888 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:45:51,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-11-28 03:45:51,909 INFO L357 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-11-28 03:45:51,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-11-28 03:45:51,940 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2024-11-28 03:45:51,940 INFO L340 BasicCegarLoop]: Counterexample is feasible [2024-11-28 03:45:51,942 INFO L782 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (1 of 2 remaining) [2024-11-28 03:45:51,945 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2024-11-28 03:45:51,945 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-28 03:45:51,950 INFO L422 BasicCegarLoop]: Path program histogram: [1, 1] [2024-11-28 03:45:51,966 INFO L170 ceAbstractionStarter]: Computing trace abstraction results [2024-11-28 03:45:51,971 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 28.11 03:45:51 BoogieIcfgContainer [2024-11-28 03:45:51,971 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2024-11-28 03:45:51,972 INFO L112 PluginConnector]: ------------------------Witness Printer---------------------------- [2024-11-28 03:45:51,972 INFO L270 PluginConnector]: Initializing Witness Printer... [2024-11-28 03:45:51,972 INFO L274 PluginConnector]: Witness Printer initialized [2024-11-28 03:45:51,973 INFO L184 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 03:45:51" (3/4) ... [2024-11-28 03:45:51,977 INFO L149 WitnessPrinter]: No result that supports witness generation found [2024-11-28 03:45:51,978 INFO L131 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2024-11-28 03:45:51,979 INFO L158 Benchmark]: Toolchain (without parser) took 2145.35ms. Allocated memory is still 142.6MB. Free memory was 105.9MB in the beginning and 46.3MB in the end (delta: 59.5MB). Peak memory consumption was 58.7MB. Max. memory is 16.1GB. [2024-11-28 03:45:51,980 INFO L158 Benchmark]: CDTParser took 0.53ms. Allocated memory is still 167.8MB. Free memory is still 105.2MB. There was no memory consumed. Max. memory is 16.1GB. [2024-11-28 03:45:51,980 INFO L158 Benchmark]: CACSL2BoogieTranslator took 495.23ms. Allocated memory is still 142.6MB. Free memory was 105.5MB in the beginning and 91.5MB in the end (delta: 14.0MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. [2024-11-28 03:45:51,980 INFO L158 Benchmark]: Boogie Procedure Inliner took 74.83ms. Allocated memory is still 142.6MB. Free memory was 91.5MB in the beginning and 90.1MB in the end (delta: 1.4MB). There was no memory consumed. Max. memory is 16.1GB. [2024-11-28 03:45:51,981 INFO L158 Benchmark]: Boogie Preprocessor took 63.90ms. Allocated memory is still 142.6MB. Free memory was 90.1MB in the beginning and 88.1MB in the end (delta: 2.0MB). There was no memory consumed. Max. memory is 16.1GB. [2024-11-28 03:45:51,981 INFO L158 Benchmark]: RCFGBuilder took 841.74ms. Allocated memory is still 142.6MB. Free memory was 88.1MB in the beginning and 68.2MB in the end (delta: 19.9MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. [2024-11-28 03:45:51,982 INFO L158 Benchmark]: TraceAbstraction took 654.21ms. Allocated memory is still 142.6MB. Free memory was 67.6MB in the beginning and 46.7MB in the end (delta: 20.9MB). Peak memory consumption was 25.2MB. Max. memory is 16.1GB. [2024-11-28 03:45:51,982 INFO L158 Benchmark]: Witness Printer took 6.25ms. Allocated memory is still 142.6MB. Free memory was 46.7MB in the beginning and 46.3MB in the end (delta: 327.7kB). There was no memory consumed. Max. memory is 16.1GB. [2024-11-28 03:45:51,987 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.53ms. Allocated memory is still 167.8MB. Free memory is still 105.2MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 495.23ms. Allocated memory is still 142.6MB. Free memory was 105.5MB in the beginning and 91.5MB in the end (delta: 14.0MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 74.83ms. Allocated memory is still 142.6MB. Free memory was 91.5MB in the beginning and 90.1MB in the end (delta: 1.4MB). There was no memory consumed. Max. memory is 16.1GB. * Boogie Preprocessor took 63.90ms. Allocated memory is still 142.6MB. Free memory was 90.1MB in the beginning and 88.1MB in the end (delta: 2.0MB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 841.74ms. Allocated memory is still 142.6MB. Free memory was 88.1MB in the beginning and 68.2MB in the end (delta: 19.9MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. * TraceAbstraction took 654.21ms. Allocated memory is still 142.6MB. Free memory was 67.6MB in the beginning and 46.7MB in the end (delta: 20.9MB). Peak memory consumption was 25.2MB. Max. memory is 16.1GB. * Witness Printer took 6.25ms. Allocated memory is still 142.6MB. Free memory was 46.7MB in the beginning and 46.3MB in the end (delta: 327.7kB). 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 47, overapproximation of someBinaryFLOATComparisonOperation at line 40, overapproximation of someBinaryArithmeticFLOAToperation at line 45. Possible FailurePath: [L310] COND TRUE __VERIFIER_nondet_int() [L311] CALL main1() [L39] float IN = __VERIFIER_nondet_float(); [L40] CALL assume_abort_if_not(IN >= 0.0f && IN < 1.0f) [L34] COND FALSE !(!cond) [L40] RET assume_abort_if_not(IN >= 0.0f && IN < 1.0f) [L42] float x = IN; [L44-L45] float result = 1.0f + 0.5f*x - 0.125f*x*x + 0.0625f*x*x*x - 0.0390625f*x*x*x*x; [L47] COND TRUE !(result >= 0.0f && result < 1.5f) [L48] reach_error() - UnprovableResult [Line: 61]: Unable to prove that a call to reach_error is unreachable Unable to prove that a call to reach_error is unreachable Reason: Not analyzed. - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 85 locations, 2 error locations. Started 1 CEGAR loops. OverallTime: 0.5s, OverallIterations: 2, TraceHistogramMax: 1, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 0.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 0 SdHoareTripleChecker+Valid, 0.0s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 0 mSDsluCounter, 114 SdHoareTripleChecker+Invalid, 0.0s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 0 mSDsCounter, 0 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 0 IncrementalHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 0 mSolverCounterUnsat, 114 mSDtfsCounter, 0 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=85occurred in iteration=0, InterpolantAutomatonStates: 2, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s 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 [2024-11-28 03:45:52,019 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dce12f9-b7f9-4583-bc8d-da617b5b33ec/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_6dce12f9-b7f9-4583-bc8d-da617b5b33ec/bin/uautomizer-verify-aQ6SnzHsRB/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dce12f9-b7f9-4583-bc8d-da617b5b33ec/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_6dce12f9-b7f9-4583-bc8d-da617b5b33ec/bin/uautomizer-verify-aQ6SnzHsRB/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dce12f9-b7f9-4583-bc8d-da617b5b33ec/bin/uautomizer-verify-aQ6SnzHsRB/config/AutomizerReach.xml -i ../../sv-benchmarks/c/combinations/square_8+soft_float_4-2a.c.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dce12f9-b7f9-4583-bc8d-da617b5b33ec/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_6dce12f9-b7f9-4583-bc8d-da617b5b33ec/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 2e745a133311e60f1a9e202bf4fcb9b524a944d790f4c1df2987f4b8dfd5e08b --- Real Ultimate output --- This is Ultimate 0.3.0-dev-d790fec [2024-11-28 03:45:55,509 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-28 03:45:55,668 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dce12f9-b7f9-4583-bc8d-da617b5b33ec/bin/uautomizer-verify-aQ6SnzHsRB/config/svcomp-Reach-32bit-Automizer_Bitvector.epf [2024-11-28 03:45:55,675 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-28 03:45:55,675 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-28 03:45:55,700 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-28 03:45:55,701 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-28 03:45:55,701 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-28 03:45:55,701 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-28 03:45:55,701 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-28 03:45:55,701 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-28 03:45:55,702 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-28 03:45:55,702 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-28 03:45:55,702 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-28 03:45:55,702 INFO L153 SettingsManager]: * Use SBE=true [2024-11-28 03:45:55,702 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-28 03:45:55,703 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-28 03:45:55,703 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-28 03:45:55,703 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-28 03:45:55,703 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-28 03:45:55,703 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-28 03:45:55,703 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-28 03:45:55,703 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-28 03:45:55,703 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-11-28 03:45:55,703 INFO L153 SettingsManager]: * Use bitvectors instead of ints=true [2024-11-28 03:45:55,704 INFO L153 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2024-11-28 03:45:55,704 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-28 03:45:55,704 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-28 03:45:55,704 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2024-11-28 03:45:55,704 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-28 03:45:55,704 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2024-11-28 03:45:55,704 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-28 03:45:55,704 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-28 03:45:55,704 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-28 03:45:55,705 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-28 03:45:55,705 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-28 03:45:55,705 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-28 03:45:55,705 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-28 03:45:55,705 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-28 03:45:55,705 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-28 03:45:55,705 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-28 03:45:55,705 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-28 03:45:55,705 INFO L153 SettingsManager]: * Compute procedure contracts=false [2024-11-28 03:45:55,705 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-28 03:45:55,706 INFO L153 SettingsManager]: * Trace refinement strategy=FOX [2024-11-28 03:45:55,706 INFO L153 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2024-11-28 03:45:55,706 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-28 03:45:55,706 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-28 03:45:55,706 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-28 03:45:55,706 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-28 03:45:55,706 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_6dce12f9-b7f9-4583-bc8d-da617b5b33ec/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 -> 2e745a133311e60f1a9e202bf4fcb9b524a944d790f4c1df2987f4b8dfd5e08b [2024-11-28 03:45:56,117 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-28 03:45:56,127 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-28 03:45:56,130 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-28 03:45:56,132 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-28 03:45:56,132 INFO L274 PluginConnector]: CDTParser initialized [2024-11-28 03:45:56,133 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dce12f9-b7f9-4583-bc8d-da617b5b33ec/bin/uautomizer-verify-aQ6SnzHsRB/../../sv-benchmarks/c/combinations/square_8+soft_float_4-2a.c.cil.c [2024-11-28 03:45:59,415 INFO L533 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dce12f9-b7f9-4583-bc8d-da617b5b33ec/bin/uautomizer-verify-aQ6SnzHsRB/data/fc46efb07/c740eff295474c58884a0e0d2ea361d0/FLAG2702a97ed [2024-11-28 03:45:59,731 INFO L384 CDTParser]: Found 1 translation units. [2024-11-28 03:45:59,732 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dce12f9-b7f9-4583-bc8d-da617b5b33ec/sv-benchmarks/c/combinations/square_8+soft_float_4-2a.c.cil.c [2024-11-28 03:45:59,743 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dce12f9-b7f9-4583-bc8d-da617b5b33ec/bin/uautomizer-verify-aQ6SnzHsRB/data/fc46efb07/c740eff295474c58884a0e0d2ea361d0/FLAG2702a97ed [2024-11-28 03:45:59,769 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dce12f9-b7f9-4583-bc8d-da617b5b33ec/bin/uautomizer-verify-aQ6SnzHsRB/data/fc46efb07/c740eff295474c58884a0e0d2ea361d0 [2024-11-28 03:45:59,774 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-28 03:45:59,776 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-28 03:45:59,779 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-28 03:45:59,781 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-28 03:45:59,787 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-28 03:45:59,788 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 03:45:59" (1/1) ... [2024-11-28 03:45:59,789 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@455cb420 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:45:59, skipping insertion in model container [2024-11-28 03:45:59,789 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 03:45:59" (1/1) ... [2024-11-28 03:45:59,828 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-28 03:46:00,066 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_6dce12f9-b7f9-4583-bc8d-da617b5b33ec/sv-benchmarks/c/combinations/square_8+soft_float_4-2a.c.cil.c[1995,2008] [2024-11-28 03:46:00,075 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_6dce12f9-b7f9-4583-bc8d-da617b5b33ec/sv-benchmarks/c/combinations/square_8+soft_float_4-2a.c.cil.c[2389,2402] [2024-11-28 03:46:00,165 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-28 03:46:00,189 INFO L200 MainTranslator]: Completed pre-run [2024-11-28 03:46:00,213 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_6dce12f9-b7f9-4583-bc8d-da617b5b33ec/sv-benchmarks/c/combinations/square_8+soft_float_4-2a.c.cil.c[1995,2008] [2024-11-28 03:46:00,219 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_6dce12f9-b7f9-4583-bc8d-da617b5b33ec/sv-benchmarks/c/combinations/square_8+soft_float_4-2a.c.cil.c[2389,2402] [2024-11-28 03:46:00,280 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-28 03:46:00,304 INFO L204 MainTranslator]: Completed translation [2024-11-28 03:46:00,305 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:46:00 WrapperNode [2024-11-28 03:46:00,305 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-28 03:46:00,306 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-28 03:46:00,308 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-28 03:46:00,309 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-28 03:46:00,319 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:46:00" (1/1) ... [2024-11-28 03:46:00,340 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:46:00" (1/1) ... [2024-11-28 03:46:00,365 INFO L138 Inliner]: procedures = 28, calls = 19, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 73 [2024-11-28 03:46:00,365 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-28 03:46:00,366 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-28 03:46:00,366 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-28 03:46:00,366 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-28 03:46:00,378 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:46:00" (1/1) ... [2024-11-28 03:46:00,379 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:46:00" (1/1) ... [2024-11-28 03:46:00,383 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:46:00" (1/1) ... [2024-11-28 03:46:00,404 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2024-11-28 03:46:00,404 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:46:00" (1/1) ... [2024-11-28 03:46:00,404 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:46:00" (1/1) ... [2024-11-28 03:46:00,431 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:46:00" (1/1) ... [2024-11-28 03:46:00,432 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:46:00" (1/1) ... [2024-11-28 03:46:00,445 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:46:00" (1/1) ... [2024-11-28 03:46:00,447 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:46:00" (1/1) ... [2024-11-28 03:46:00,449 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:46:00" (1/1) ... [2024-11-28 03:46:00,457 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-28 03:46:00,458 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-28 03:46:00,458 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-28 03:46:00,458 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-28 03:46:00,463 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:46:00" (1/1) ... [2024-11-28 03:46:00,471 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-28 03:46:00,489 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dce12f9-b7f9-4583-bc8d-da617b5b33ec/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:46:00,505 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dce12f9-b7f9-4583-bc8d-da617b5b33ec/bin/uautomizer-verify-aQ6SnzHsRB/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-11-28 03:46:00,509 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dce12f9-b7f9-4583-bc8d-da617b5b33ec/bin/uautomizer-verify-aQ6SnzHsRB/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-11-28 03:46:00,542 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-28 03:46:00,542 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1#0 [2024-11-28 03:46:00,542 INFO L130 BoogieDeclarations]: Found specification of procedure base2flt [2024-11-28 03:46:00,543 INFO L138 BoogieDeclarations]: Found implementation of procedure base2flt [2024-11-28 03:46:00,543 INFO L130 BoogieDeclarations]: Found specification of procedure addflt [2024-11-28 03:46:00,543 INFO L138 BoogieDeclarations]: Found implementation of procedure addflt [2024-11-28 03:46:00,543 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-28 03:46:00,543 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-28 03:46:00,543 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2024-11-28 03:46:00,543 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2024-11-28 03:46:00,661 INFO L234 CfgBuilder]: Building ICFG [2024-11-28 03:46:00,664 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-28 03:46:05,369 INFO L? ?]: Removed 44 outVars from TransFormulas that were not future-live. [2024-11-28 03:46:05,372 INFO L283 CfgBuilder]: Performing block encoding [2024-11-28 03:46:05,393 INFO L307 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-28 03:46:05,393 INFO L312 CfgBuilder]: Removed 4 assume(true) statements. [2024-11-28 03:46:05,394 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 03:46:05 BoogieIcfgContainer [2024-11-28 03:46:05,394 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-28 03:46:05,400 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-28 03:46:05,400 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-28 03:46:05,407 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-28 03:46:05,408 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.11 03:45:59" (1/3) ... [2024-11-28 03:46:05,409 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@51068827 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 03:46:05, skipping insertion in model container [2024-11-28 03:46:05,410 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:46:00" (2/3) ... [2024-11-28 03:46:05,410 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@51068827 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 03:46:05, skipping insertion in model container [2024-11-28 03:46:05,412 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 03:46:05" (3/3) ... [2024-11-28 03:46:05,413 INFO L128 eAbstractionObserver]: Analyzing ICFG square_8+soft_float_4-2a.c.cil.c [2024-11-28 03:46:05,435 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-28 03:46:05,437 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG square_8+soft_float_4-2a.c.cil.c that has 4 procedures, 61 locations, 1 initial locations, 2 loop locations, and 2 error locations. [2024-11-28 03:46:05,521 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-28 03:46:05,541 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;@54f621c, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-28 03:46:05,543 INFO L334 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2024-11-28 03:46:05,548 INFO L276 IsEmpty]: Start isEmpty. Operand has 61 states, 47 states have (on average 1.5106382978723405) internal successors, (71), 49 states have internal predecessors, (71), 8 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2024-11-28 03:46:05,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2024-11-28 03:46:05,556 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 03:46:05,557 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:46:05,558 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 03:46:05,565 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:46:05,568 INFO L85 PathProgramCache]: Analyzing trace with hash 78502818, now seen corresponding path program 1 times [2024-11-28 03:46:05,581 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-28 03:46:05,581 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1482416916] [2024-11-28 03:46:05,581 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 03:46:05,582 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-11-28 03:46:05,582 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dce12f9-b7f9-4583-bc8d-da617b5b33ec/bin/uautomizer-verify-aQ6SnzHsRB/mathsat [2024-11-28 03:46:05,584 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dce12f9-b7f9-4583-bc8d-da617b5b33ec/bin/uautomizer-verify-aQ6SnzHsRB/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2024-11-28 03:46:05,589 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dce12f9-b7f9-4583-bc8d-da617b5b33ec/bin/uautomizer-verify-aQ6SnzHsRB/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2024-11-28 03:46:06,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:46:06,202 INFO L256 TraceCheckSpWp]: Trace formula consists of 20 conjuncts, 1 conjuncts are in the unsatisfiable core [2024-11-28 03:46:06,206 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:46:06,224 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:46:06,224 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-28 03:46:06,225 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-28 03:46:06,225 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1482416916] [2024-11-28 03:46:06,226 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1482416916] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 03:46:06,226 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 03:46:06,227 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-28 03:46:06,229 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1358900523] [2024-11-28 03:46:06,230 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 03:46:06,234 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-11-28 03:46:06,235 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-28 03:46:06,260 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-11-28 03:46:06,261 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-11-28 03:46:06,289 INFO L87 Difference]: Start difference. First operand has 61 states, 47 states have (on average 1.5106382978723405) internal successors, (71), 49 states have internal predecessors, (71), 8 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) Second operand has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:46:06,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 03:46:06,336 INFO L93 Difference]: Finished difference Result 117 states and 174 transitions. [2024-11-28 03:46:06,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-11-28 03:46:06,339 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2024-11-28 03:46:06,340 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 03:46:06,348 INFO L225 Difference]: With dead ends: 117 [2024-11-28 03:46:06,349 INFO L226 Difference]: Without dead ends: 54 [2024-11-28 03:46:06,355 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-11-28 03:46:06,359 INFO L435 NwaCegarLoop]: 79 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 79 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-28 03:46:06,360 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 79 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-28 03:46:06,375 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2024-11-28 03:46:06,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2024-11-28 03:46:06,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 41 states have (on average 1.3658536585365855) internal successors, (56), 43 states have internal predecessors, (56), 8 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2024-11-28 03:46:06,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 71 transitions. [2024-11-28 03:46:06,416 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 71 transitions. Word has length 7 [2024-11-28 03:46:06,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 03:46:06,417 INFO L471 AbstractCegarLoop]: Abstraction has 54 states and 71 transitions. [2024-11-28 03:46:06,418 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:46:06,418 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 71 transitions. [2024-11-28 03:46:06,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2024-11-28 03:46:06,418 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 03:46:06,419 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:46:06,436 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dce12f9-b7f9-4583-bc8d-da617b5b33ec/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)] Forceful destruction successful, exit code 0 [2024-11-28 03:46:06,620 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dce12f9-b7f9-4583-bc8d-da617b5b33ec/bin/uautomizer-verify-aQ6SnzHsRB/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-11-28 03:46:06,621 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 03:46:06,622 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:46:06,622 INFO L85 PathProgramCache]: Analyzing trace with hash 78562400, now seen corresponding path program 1 times [2024-11-28 03:46:06,622 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-28 03:46:06,623 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [211264686] [2024-11-28 03:46:06,623 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 03:46:06,623 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-11-28 03:46:06,623 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dce12f9-b7f9-4583-bc8d-da617b5b33ec/bin/uautomizer-verify-aQ6SnzHsRB/mathsat [2024-11-28 03:46:06,626 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dce12f9-b7f9-4583-bc8d-da617b5b33ec/bin/uautomizer-verify-aQ6SnzHsRB/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2024-11-28 03:46:06,628 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dce12f9-b7f9-4583-bc8d-da617b5b33ec/bin/uautomizer-verify-aQ6SnzHsRB/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2024-11-28 03:47:34,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:47:34,945 INFO L256 TraceCheckSpWp]: Trace formula consists of 20 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-11-28 03:47:34,948 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:47:43,978 WARN L286 SmtUtils]: Spent 8.32s on a formula simplification that was a NOOP. DAG size: 3 (called from [L 728] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2024-11-28 03:47:52,116 WARN L286 SmtUtils]: Spent 8.14s on a formula simplification that was a NOOP. DAG size: 28 (called from [L 728] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2024-11-28 03:48:00,370 WARN L286 SmtUtils]: Spent 8.25s on a formula simplification that was a NOOP. DAG size: 5 (called from [L 728] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2024-11-28 03:48:04,461 WARN L851 $PredicateComparison]: unable to prove that (and (exists ((|v_ULTIMATE.start_main1_~IN~0#1_5| (_ FloatingPoint 8 24))) (let ((.cse0 ((_ to_fp 8 24) c_currentRoundingMode 1.0))) (and (fp.geq |v_ULTIMATE.start_main1_~IN~0#1_5| (_ +zero 8 24)) (fp.lt |v_ULTIMATE.start_main1_~IN~0#1_5| .cse0) (= (fp.sub c_currentRoundingMode (fp.add c_currentRoundingMode (fp.sub c_currentRoundingMode (fp.add c_currentRoundingMode .cse0 (fp.mul c_currentRoundingMode ((_ to_fp 8 24) c_currentRoundingMode (/ 1.0 2.0)) |v_ULTIMATE.start_main1_~IN~0#1_5|)) (fp.mul c_currentRoundingMode (fp.mul c_currentRoundingMode ((_ to_fp 8 24) c_currentRoundingMode (/ 1.0 8.0)) |v_ULTIMATE.start_main1_~IN~0#1_5|) |v_ULTIMATE.start_main1_~IN~0#1_5|)) (fp.mul c_currentRoundingMode (fp.mul c_currentRoundingMode (fp.mul c_currentRoundingMode ((_ to_fp 8 24) c_currentRoundingMode (/ 1.0 16.0)) |v_ULTIMATE.start_main1_~IN~0#1_5|) |v_ULTIMATE.start_main1_~IN~0#1_5|) |v_ULTIMATE.start_main1_~IN~0#1_5|)) (fp.mul c_currentRoundingMode (fp.mul c_currentRoundingMode (fp.mul c_currentRoundingMode (fp.mul c_currentRoundingMode ((_ to_fp 8 24) c_currentRoundingMode (/ 5.0 128.0)) |v_ULTIMATE.start_main1_~IN~0#1_5|) |v_ULTIMATE.start_main1_~IN~0#1_5|) |v_ULTIMATE.start_main1_~IN~0#1_5|) |v_ULTIMATE.start_main1_~IN~0#1_5|)) |c_ULTIMATE.start_main1_~result~0#1|)))) (= c_currentRoundingMode roundNearestTiesToEven)) is different from false [2024-11-28 03:48:20,912 WARN L286 SmtUtils]: Spent 8.27s on a formula simplification that was a NOOP. DAG size: 3 (called from [L 728] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2024-11-28 03:48:29,190 WARN L286 SmtUtils]: Spent 8.28s on a formula simplification that was a NOOP. DAG size: 5 (called from [L 728] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2024-11-28 03:48:37,341 WARN L286 SmtUtils]: Spent 8.15s on a formula simplification that was a NOOP. DAG size: 30 (called from [L 728] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2024-11-28 03:48:49,702 WARN L286 SmtUtils]: Spent 8.29s on a formula simplification that was a NOOP. DAG size: 3 (called from [L 728] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2024-11-28 03:48:58,031 WARN L286 SmtUtils]: Spent 8.33s on a formula simplification that was a NOOP. DAG size: 5 (called from [L 728] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2024-11-28 03:49:06,177 WARN L286 SmtUtils]: Spent 8.15s on a formula simplification that was a NOOP. DAG size: 29 (called from [L 728] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2024-11-28 03:49:10,314 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 (/ 3.0 2.0)))))) (exists ((|v_ULTIMATE.start_main1_~IN~0#1_5| (_ FloatingPoint 8 24))) (and (fp.geq |v_ULTIMATE.start_main1_~IN~0#1_5| (_ +zero 8 24)) (fp.lt |v_ULTIMATE.start_main1_~IN~0#1_5| .cse0) (not (fp.geq (fp.sub roundNearestTiesToEven (fp.add roundNearestTiesToEven (fp.sub roundNearestTiesToEven (fp.add roundNearestTiesToEven .cse0 (fp.mul roundNearestTiesToEven .cse1 |v_ULTIMATE.start_main1_~IN~0#1_5|)) (fp.mul roundNearestTiesToEven (fp.mul roundNearestTiesToEven .cse2 |v_ULTIMATE.start_main1_~IN~0#1_5|) |v_ULTIMATE.start_main1_~IN~0#1_5|)) (fp.mul roundNearestTiesToEven (fp.mul roundNearestTiesToEven (fp.mul roundNearestTiesToEven .cse3 |v_ULTIMATE.start_main1_~IN~0#1_5|) |v_ULTIMATE.start_main1_~IN~0#1_5|) |v_ULTIMATE.start_main1_~IN~0#1_5|)) (fp.mul roundNearestTiesToEven (fp.mul roundNearestTiesToEven (fp.mul roundNearestTiesToEven (fp.mul roundNearestTiesToEven .cse4 |v_ULTIMATE.start_main1_~IN~0#1_5|) |v_ULTIMATE.start_main1_~IN~0#1_5|) |v_ULTIMATE.start_main1_~IN~0#1_5|) |v_ULTIMATE.start_main1_~IN~0#1_5|)) (_ +zero 8 24))))))) is different from false [2024-11-28 03:49:14,370 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 (/ 3.0 2.0)))))) (exists ((|v_ULTIMATE.start_main1_~IN~0#1_5| (_ FloatingPoint 8 24))) (and (fp.geq |v_ULTIMATE.start_main1_~IN~0#1_5| (_ +zero 8 24)) (fp.lt |v_ULTIMATE.start_main1_~IN~0#1_5| .cse0) (not (fp.geq (fp.sub roundNearestTiesToEven (fp.add roundNearestTiesToEven (fp.sub roundNearestTiesToEven (fp.add roundNearestTiesToEven .cse0 (fp.mul roundNearestTiesToEven .cse1 |v_ULTIMATE.start_main1_~IN~0#1_5|)) (fp.mul roundNearestTiesToEven (fp.mul roundNearestTiesToEven .cse2 |v_ULTIMATE.start_main1_~IN~0#1_5|) |v_ULTIMATE.start_main1_~IN~0#1_5|)) (fp.mul roundNearestTiesToEven (fp.mul roundNearestTiesToEven (fp.mul roundNearestTiesToEven .cse3 |v_ULTIMATE.start_main1_~IN~0#1_5|) |v_ULTIMATE.start_main1_~IN~0#1_5|) |v_ULTIMATE.start_main1_~IN~0#1_5|)) (fp.mul roundNearestTiesToEven (fp.mul roundNearestTiesToEven (fp.mul roundNearestTiesToEven (fp.mul roundNearestTiesToEven .cse4 |v_ULTIMATE.start_main1_~IN~0#1_5|) |v_ULTIMATE.start_main1_~IN~0#1_5|) |v_ULTIMATE.start_main1_~IN~0#1_5|) |v_ULTIMATE.start_main1_~IN~0#1_5|)) (_ +zero 8 24))))))) is different from true [2024-11-28 03:49:14,370 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:49:14,371 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-28 03:49:14,371 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-28 03:49:14,371 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [211264686] [2024-11-28 03:49:14,371 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [211264686] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 03:49:14,371 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 03:49:14,371 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-28 03:49:14,371 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [951512187] [2024-11-28 03:49:14,371 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 03:49:14,373 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-28 03:49:14,373 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-28 03:49:14,374 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-28 03:49:14,374 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=12, Unknown=3, NotChecked=14, Total=42 [2024-11-28 03:49:14,375 INFO L87 Difference]: Start difference. First operand 54 states and 71 transitions. Second operand has 7 states, 6 states have (on average 1.1666666666666667) internal successors, (7), 6 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:49:18,724 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.22s for a HTC check with result UNKNOWN. Formula has sorts [Bool, FloatingPoint, RoundingMode, Real], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-11-28 03:49:22,732 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, FloatingPoint, RoundingMode, Real, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-11-28 03:49:26,735 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, FloatingPoint, RoundingMode, Real], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-11-28 03:49:27,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 03:49:27,220 INFO L93 Difference]: Finished difference Result 54 states and 71 transitions. [2024-11-28 03:49:27,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-28 03:49:27,221 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 1.1666666666666667) internal successors, (7), 6 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2024-11-28 03:49:27,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 03:49:27,222 INFO L225 Difference]: With dead ends: 54 [2024-11-28 03:49:27,222 INFO L226 Difference]: Without dead ends: 49 [2024-11-28 03:49:27,222 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 12.6s TimeCoverageRelationStatistics Valid=13, Invalid=12, Unknown=3, NotChecked=14, Total=42 [2024-11-28 03:49:27,223 INFO L435 NwaCegarLoop]: 66 mSDtfsCounter, 65 mSDsluCounter, 100 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 0 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 12.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 166 SdHoareTripleChecker+Invalid, 181 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 142 IncrementalHoareTripleChecker+Unchecked, 12.8s IncrementalHoareTripleChecker+Time [2024-11-28 03:49:27,224 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [65 Valid, 166 Invalid, 181 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 36 Invalid, 3 Unknown, 142 Unchecked, 12.8s Time] [2024-11-28 03:49:27,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2024-11-28 03:49:27,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2024-11-28 03:49:27,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 37 states have (on average 1.3783783783783783) internal successors, (51), 38 states have internal predecessors, (51), 8 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2024-11-28 03:49:27,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 66 transitions. [2024-11-28 03:49:27,235 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 66 transitions. Word has length 7 [2024-11-28 03:49:27,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 03:49:27,235 INFO L471 AbstractCegarLoop]: Abstraction has 49 states and 66 transitions. [2024-11-28 03:49:27,235 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 1.1666666666666667) internal successors, (7), 6 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:49:27,236 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 66 transitions. [2024-11-28 03:49:27,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2024-11-28 03:49:27,237 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 03:49:27,237 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:49:27,258 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dce12f9-b7f9-4583-bc8d-da617b5b33ec/bin/uautomizer-verify-aQ6SnzHsRB/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2024-11-28 03:49:27,438 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dce12f9-b7f9-4583-bc8d-da617b5b33ec/bin/uautomizer-verify-aQ6SnzHsRB/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-11-28 03:49:27,438 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 03:49:27,439 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:49:27,439 INFO L85 PathProgramCache]: Analyzing trace with hash 1357209922, now seen corresponding path program 1 times [2024-11-28 03:49:27,439 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-28 03:49:27,439 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1889001504] [2024-11-28 03:49:27,439 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 03:49:27,441 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:49:27,441 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dce12f9-b7f9-4583-bc8d-da617b5b33ec/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:49:27,443 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dce12f9-b7f9-4583-bc8d-da617b5b33ec/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:49:27,445 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dce12f9-b7f9-4583-bc8d-da617b5b33ec/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-28 03:49:27,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:49:27,538 INFO L256 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-11-28 03:49:27,543 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:49:28,561 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-28 03:49:28,561 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 03:49:29,060 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-28 03:49:29,060 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-28 03:49:29,060 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1889001504] [2024-11-28 03:49:29,061 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1889001504] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 03:49:29,061 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-28 03:49:29,061 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2024-11-28 03:49:29,061 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [840313743] [2024-11-28 03:49:29,061 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-28 03:49:29,062 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-11-28 03:49:29,062 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-28 03:49:29,063 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-11-28 03:49:29,063 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2024-11-28 03:49:29,064 INFO L87 Difference]: Start difference. First operand 49 states and 66 transitions. Second operand has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 7 states have internal predecessors, (19), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-11-28 03:49:30,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 03:49:30,227 INFO L93 Difference]: Finished difference Result 98 states and 134 transitions. [2024-11-28 03:49:30,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-28 03:49:30,228 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 7 states have internal predecessors, (19), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 32 [2024-11-28 03:49:30,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 03:49:30,231 INFO L225 Difference]: With dead ends: 98 [2024-11-28 03:49:30,232 INFO L226 Difference]: Without dead ends: 70 [2024-11-28 03:49:30,232 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2024-11-28 03:49:30,233 INFO L435 NwaCegarLoop]: 59 mSDtfsCounter, 14 mSDsluCounter, 405 mSDsCounter, 0 mSdLazyCounter, 69 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 464 SdHoareTripleChecker+Invalid, 71 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 69 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2024-11-28 03:49:30,234 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 464 Invalid, 71 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 69 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2024-11-28 03:49:30,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2024-11-28 03:49:30,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 62. [2024-11-28 03:49:30,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 46 states have (on average 1.326086956521739) internal successors, (61), 48 states have internal predecessors, (61), 10 states have call successors, (10), 4 states have call predecessors, (10), 5 states have return successors, (13), 9 states have call predecessors, (13), 9 states have call successors, (13) [2024-11-28 03:49:30,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 84 transitions. [2024-11-28 03:49:30,249 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 84 transitions. Word has length 32 [2024-11-28 03:49:30,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 03:49:30,250 INFO L471 AbstractCegarLoop]: Abstraction has 62 states and 84 transitions. [2024-11-28 03:49:30,250 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 7 states have internal predecessors, (19), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-11-28 03:49:30,250 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 84 transitions. [2024-11-28 03:49:30,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2024-11-28 03:49:30,252 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 03:49:30,252 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:49:30,261 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dce12f9-b7f9-4583-bc8d-da617b5b33ec/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-11-28 03:49:30,452 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dce12f9-b7f9-4583-bc8d-da617b5b33ec/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:49:30,453 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 03:49:30,453 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:49:30,453 INFO L85 PathProgramCache]: Analyzing trace with hash -569601816, now seen corresponding path program 1 times [2024-11-28 03:49:30,454 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-28 03:49:30,454 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1197475855] [2024-11-28 03:49:30,454 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 03:49:30,454 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:49:30,454 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dce12f9-b7f9-4583-bc8d-da617b5b33ec/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:49:30,456 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dce12f9-b7f9-4583-bc8d-da617b5b33ec/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:49:30,457 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dce12f9-b7f9-4583-bc8d-da617b5b33ec/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-28 03:49:30,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:49:30,563 INFO L256 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 13 conjuncts are in the unsatisfiable core [2024-11-28 03:49:30,565 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:49:32,457 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-28 03:49:32,458 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 03:49:33,912 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-28 03:49:33,913 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-28 03:49:33,913 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1197475855] [2024-11-28 03:49:33,913 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1197475855] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-28 03:49:33,913 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-28 03:49:33,913 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [12] total 16 [2024-11-28 03:49:33,914 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [299703610] [2024-11-28 03:49:33,914 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 03:49:33,914 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-28 03:49:33,914 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-28 03:49:33,915 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-28 03:49:33,916 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2024-11-28 03:49:33,916 INFO L87 Difference]: Start difference. First operand 62 states and 84 transitions. Second operand has 8 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 6 states have internal predecessors, (23), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2024-11-28 03:49:34,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 03:49:34,861 INFO L93 Difference]: Finished difference Result 126 states and 168 transitions. [2024-11-28 03:49:34,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-28 03:49:34,863 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 6 states have internal predecessors, (23), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 35 [2024-11-28 03:49:34,863 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 03:49:34,865 INFO L225 Difference]: With dead ends: 126 [2024-11-28 03:49:34,865 INFO L226 Difference]: Without dead ends: 94 [2024-11-28 03:49:34,866 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2024-11-28 03:49:34,867 INFO L435 NwaCegarLoop]: 73 mSDtfsCounter, 24 mSDsluCounter, 413 mSDsCounter, 0 mSdLazyCounter, 64 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 486 SdHoareTripleChecker+Invalid, 67 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 64 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2024-11-28 03:49:34,867 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 486 Invalid, 67 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 64 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2024-11-28 03:49:34,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2024-11-28 03:49:34,881 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 87. [2024-11-28 03:49:34,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 65 states have (on average 1.2923076923076924) internal successors, (84), 67 states have internal predecessors, (84), 14 states have call successors, (14), 6 states have call predecessors, (14), 7 states have return successors, (17), 13 states have call predecessors, (17), 13 states have call successors, (17) [2024-11-28 03:49:34,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 115 transitions. [2024-11-28 03:49:34,884 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 115 transitions. Word has length 35 [2024-11-28 03:49:34,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 03:49:34,885 INFO L471 AbstractCegarLoop]: Abstraction has 87 states and 115 transitions. [2024-11-28 03:49:34,885 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 6 states have internal predecessors, (23), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2024-11-28 03:49:34,885 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 115 transitions. [2024-11-28 03:49:34,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2024-11-28 03:49:34,887 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 03:49:34,887 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:49:34,895 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dce12f9-b7f9-4583-bc8d-da617b5b33ec/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-11-28 03:49:35,089 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dce12f9-b7f9-4583-bc8d-da617b5b33ec/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:49:35,089 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 03:49:35,090 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:49:35,090 INFO L85 PathProgramCache]: Analyzing trace with hash -512343514, now seen corresponding path program 1 times [2024-11-28 03:49:35,090 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-28 03:49:35,090 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [210911983] [2024-11-28 03:49:35,090 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 03:49:35,090 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:49:35,090 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dce12f9-b7f9-4583-bc8d-da617b5b33ec/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:49:35,093 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dce12f9-b7f9-4583-bc8d-da617b5b33ec/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:49:35,096 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dce12f9-b7f9-4583-bc8d-da617b5b33ec/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-28 03:49:35,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:49:35,157 INFO L256 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-11-28 03:49:35,159 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:49:35,895 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-28 03:49:35,895 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-28 03:49:35,895 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-28 03:49:35,895 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [210911983] [2024-11-28 03:49:35,895 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [210911983] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 03:49:35,895 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 03:49:35,895 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-11-28 03:49:35,896 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [826420813] [2024-11-28 03:49:35,896 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 03:49:35,896 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-28 03:49:35,896 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-28 03:49:35,897 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-28 03:49:35,897 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2024-11-28 03:49:35,897 INFO L87 Difference]: Start difference. First operand 87 states and 115 transitions. Second operand has 8 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 6 states have internal predecessors, (23), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2024-11-28 03:49:36,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 03:49:36,529 INFO L93 Difference]: Finished difference Result 125 states and 164 transitions. [2024-11-28 03:49:36,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-28 03:49:36,530 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 6 states have internal predecessors, (23), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 35 [2024-11-28 03:49:36,530 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 03:49:36,531 INFO L225 Difference]: With dead ends: 125 [2024-11-28 03:49:36,531 INFO L226 Difference]: Without dead ends: 85 [2024-11-28 03:49:36,532 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2024-11-28 03:49:36,532 INFO L435 NwaCegarLoop]: 60 mSDtfsCounter, 12 mSDsluCounter, 352 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 412 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-11-28 03:49:36,533 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 412 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-11-28 03:49:36,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2024-11-28 03:49:36,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 70. [2024-11-28 03:49:36,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 52 states have (on average 1.2884615384615385) internal successors, (67), 54 states have internal predecessors, (67), 11 states have call successors, (11), 5 states have call predecessors, (11), 6 states have return successors, (14), 10 states have call predecessors, (14), 10 states have call successors, (14) [2024-11-28 03:49:36,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 92 transitions. [2024-11-28 03:49:36,543 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 92 transitions. Word has length 35 [2024-11-28 03:49:36,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 03:49:36,544 INFO L471 AbstractCegarLoop]: Abstraction has 70 states and 92 transitions. [2024-11-28 03:49:36,544 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 6 states have internal predecessors, (23), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2024-11-28 03:49:36,544 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 92 transitions. [2024-11-28 03:49:36,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2024-11-28 03:49:36,546 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 03:49:36,546 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:49:36,555 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dce12f9-b7f9-4583-bc8d-da617b5b33ec/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2024-11-28 03:49:36,746 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dce12f9-b7f9-4583-bc8d-da617b5b33ec/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:49:36,746 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 03:49:36,747 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:49:36,747 INFO L85 PathProgramCache]: Analyzing trace with hash -996850200, now seen corresponding path program 2 times [2024-11-28 03:49:36,747 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-28 03:49:36,747 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1587080322] [2024-11-28 03:49:36,747 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 03:49:36,748 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:49:36,748 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dce12f9-b7f9-4583-bc8d-da617b5b33ec/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:49:36,749 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dce12f9-b7f9-4583-bc8d-da617b5b33ec/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:49:36,750 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dce12f9-b7f9-4583-bc8d-da617b5b33ec/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-28 03:49:36,803 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-11-28 03:49:36,803 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:49:36,807 INFO L256 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-11-28 03:49:36,809 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:49:38,710 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-28 03:49:38,711 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-28 03:49:38,711 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-28 03:49:38,711 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1587080322] [2024-11-28 03:49:38,711 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1587080322] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 03:49:38,711 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 03:49:38,711 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2024-11-28 03:49:38,711 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [939820661] [2024-11-28 03:49:38,711 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 03:49:38,712 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-11-28 03:49:38,712 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-28 03:49:38,712 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-11-28 03:49:38,713 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2024-11-28 03:49:38,713 INFO L87 Difference]: Start difference. First operand 70 states and 92 transitions. Second operand has 12 states, 10 states have (on average 2.3) internal successors, (23), 9 states have internal predecessors, (23), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2024-11-28 03:49:41,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 03:49:41,519 INFO L93 Difference]: Finished difference Result 145 states and 191 transitions. [2024-11-28 03:49:41,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-11-28 03:49:41,521 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 10 states have (on average 2.3) internal successors, (23), 9 states have internal predecessors, (23), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 38 [2024-11-28 03:49:41,521 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 03:49:41,522 INFO L225 Difference]: With dead ends: 145 [2024-11-28 03:49:41,523 INFO L226 Difference]: Without dead ends: 113 [2024-11-28 03:49:41,523 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=46, Invalid=226, Unknown=0, NotChecked=0, Total=272 [2024-11-28 03:49:41,524 INFO L435 NwaCegarLoop]: 97 mSDtfsCounter, 40 mSDsluCounter, 889 mSDsCounter, 0 mSdLazyCounter, 181 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 986 SdHoareTripleChecker+Invalid, 188 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 181 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2024-11-28 03:49:41,525 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [42 Valid, 986 Invalid, 188 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 181 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2024-11-28 03:49:41,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2024-11-28 03:49:41,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 103. [2024-11-28 03:49:41,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 77 states have (on average 1.2597402597402598) internal successors, (97), 80 states have internal predecessors, (97), 15 states have call successors, (15), 8 states have call predecessors, (15), 10 states have return successors, (22), 14 states have call predecessors, (22), 14 states have call successors, (22) [2024-11-28 03:49:41,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 134 transitions. [2024-11-28 03:49:41,546 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 134 transitions. Word has length 38 [2024-11-28 03:49:41,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 03:49:41,546 INFO L471 AbstractCegarLoop]: Abstraction has 103 states and 134 transitions. [2024-11-28 03:49:41,546 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 10 states have (on average 2.3) internal successors, (23), 9 states have internal predecessors, (23), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2024-11-28 03:49:41,547 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 134 transitions. [2024-11-28 03:49:41,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2024-11-28 03:49:41,548 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 03:49:41,549 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:49:41,558 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dce12f9-b7f9-4583-bc8d-da617b5b33ec/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-11-28 03:49:41,749 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dce12f9-b7f9-4583-bc8d-da617b5b33ec/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:49:41,750 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 03:49:41,750 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:49:41,750 INFO L85 PathProgramCache]: Analyzing trace with hash 526581804, now seen corresponding path program 1 times [2024-11-28 03:49:41,750 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-28 03:49:41,750 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [782966084] [2024-11-28 03:49:41,750 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 03:49:41,750 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:49:41,751 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dce12f9-b7f9-4583-bc8d-da617b5b33ec/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:49:41,752 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dce12f9-b7f9-4583-bc8d-da617b5b33ec/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:49:41,755 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dce12f9-b7f9-4583-bc8d-da617b5b33ec/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-28 03:49:41,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:49:41,815 INFO L256 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-11-28 03:49:41,817 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:49:42,553 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2024-11-28 03:49:42,554 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 03:49:42,964 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2024-11-28 03:49:42,964 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-28 03:49:42,964 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [782966084] [2024-11-28 03:49:42,964 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [782966084] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 03:49:42,964 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-28 03:49:42,965 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2024-11-28 03:49:42,965 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1794726741] [2024-11-28 03:49:42,965 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-28 03:49:42,965 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-28 03:49:42,965 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-28 03:49:42,966 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-28 03:49:42,966 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2024-11-28 03:49:42,966 INFO L87 Difference]: Start difference. First operand 103 states and 134 transitions. Second operand has 8 states, 8 states have (on average 3.0) internal successors, (24), 6 states have internal predecessors, (24), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-11-28 03:49:43,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 03:49:43,845 INFO L93 Difference]: Finished difference Result 205 states and 269 transitions. [2024-11-28 03:49:43,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-28 03:49:43,846 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.0) internal successors, (24), 6 states have internal predecessors, (24), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 38 [2024-11-28 03:49:43,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 03:49:43,849 INFO L225 Difference]: With dead ends: 205 [2024-11-28 03:49:43,849 INFO L226 Difference]: Without dead ends: 160 [2024-11-28 03:49:43,850 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2024-11-28 03:49:43,850 INFO L435 NwaCegarLoop]: 102 mSDtfsCounter, 36 mSDsluCounter, 549 mSDsCounter, 0 mSdLazyCounter, 71 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 651 SdHoareTripleChecker+Invalid, 75 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 71 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2024-11-28 03:49:43,851 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [38 Valid, 651 Invalid, 75 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 71 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2024-11-28 03:49:43,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2024-11-28 03:49:43,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 139. [2024-11-28 03:49:43,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 139 states, 104 states have (on average 1.2596153846153846) internal successors, (131), 107 states have internal predecessors, (131), 22 states have call successors, (22), 10 states have call predecessors, (22), 12 states have return successors, (31), 21 states have call predecessors, (31), 21 states have call successors, (31) [2024-11-28 03:49:43,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 184 transitions. [2024-11-28 03:49:43,889 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 184 transitions. Word has length 38 [2024-11-28 03:49:43,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 03:49:43,889 INFO L471 AbstractCegarLoop]: Abstraction has 139 states and 184 transitions. [2024-11-28 03:49:43,889 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.0) internal successors, (24), 6 states have internal predecessors, (24), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-11-28 03:49:43,890 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 184 transitions. [2024-11-28 03:49:43,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2024-11-28 03:49:43,892 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 03:49:43,892 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:49:43,904 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dce12f9-b7f9-4583-bc8d-da617b5b33ec/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-11-28 03:49:44,092 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dce12f9-b7f9-4583-bc8d-da617b5b33ec/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:49:44,093 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 03:49:44,093 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:49:44,093 INFO L85 PathProgramCache]: Analyzing trace with hash 583840106, now seen corresponding path program 1 times [2024-11-28 03:49:44,093 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-28 03:49:44,093 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1350058806] [2024-11-28 03:49:44,093 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 03:49:44,093 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:49:44,094 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dce12f9-b7f9-4583-bc8d-da617b5b33ec/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:49:44,095 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dce12f9-b7f9-4583-bc8d-da617b5b33ec/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:49:44,098 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dce12f9-b7f9-4583-bc8d-da617b5b33ec/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-28 03:49:44,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:49:44,151 INFO L256 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjuncts are in the unsatisfiable core [2024-11-28 03:49:44,153 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:49:45,537 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2024-11-28 03:49:45,537 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 03:49:48,567 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-28 03:49:48,567 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1350058806] [2024-11-28 03:49:48,567 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1350058806] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 03:49:48,567 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [230266273] [2024-11-28 03:49:48,567 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 03:49:48,567 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-11-28 03:49:48,568 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dce12f9-b7f9-4583-bc8d-da617b5b33ec/bin/uautomizer-verify-aQ6SnzHsRB/cvc4 [2024-11-28 03:49:48,581 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dce12f9-b7f9-4583-bc8d-da617b5b33ec/bin/uautomizer-verify-aQ6SnzHsRB/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2024-11-28 03:49:48,582 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dce12f9-b7f9-4583-bc8d-da617b5b33ec/bin/uautomizer-verify-aQ6SnzHsRB/cvc4 --incremental --print-success --lang smt (10)] Waiting until timeout for monitored process [2024-11-28 03:49:48,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:49:48,706 INFO L256 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjuncts are in the unsatisfiable core [2024-11-28 03:49:48,713 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:49:49,206 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2024-11-28 03:49:49,206 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 03:49:49,469 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [230266273] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 03:49:49,469 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-28 03:49:49,470 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2024-11-28 03:49:49,470 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [912410477] [2024-11-28 03:49:49,470 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-28 03:49:49,470 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-28 03:49:49,470 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-28 03:49:49,471 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-28 03:49:49,471 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=235, Unknown=0, NotChecked=0, Total=272 [2024-11-28 03:49:49,472 INFO L87 Difference]: Start difference. First operand 139 states and 184 transitions. Second operand has 11 states, 10 states have (on average 2.4) internal successors, (24), 8 states have internal predecessors, (24), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-11-28 03:49:51,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 03:49:51,622 INFO L93 Difference]: Finished difference Result 170 states and 216 transitions. [2024-11-28 03:49:51,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-11-28 03:49:51,623 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 2.4) internal successors, (24), 8 states have internal predecessors, (24), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 38 [2024-11-28 03:49:51,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 03:49:51,625 INFO L225 Difference]: With dead ends: 170 [2024-11-28 03:49:51,625 INFO L226 Difference]: Without dead ends: 168 [2024-11-28 03:49:51,626 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 78 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=58, Invalid=322, Unknown=0, NotChecked=0, Total=380 [2024-11-28 03:49:51,627 INFO L435 NwaCegarLoop]: 101 mSDtfsCounter, 38 mSDsluCounter, 830 mSDsCounter, 0 mSdLazyCounter, 147 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 931 SdHoareTripleChecker+Invalid, 152 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 147 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2024-11-28 03:49:51,627 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [40 Valid, 931 Invalid, 152 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 147 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2024-11-28 03:49:51,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2024-11-28 03:49:51,652 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 147. [2024-11-28 03:49:51,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 147 states, 110 states have (on average 1.2454545454545454) internal successors, (137), 113 states have internal predecessors, (137), 22 states have call successors, (22), 12 states have call predecessors, (22), 14 states have return successors, (31), 21 states have call predecessors, (31), 21 states have call successors, (31) [2024-11-28 03:49:51,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 190 transitions. [2024-11-28 03:49:51,655 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 190 transitions. Word has length 38 [2024-11-28 03:49:51,656 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 03:49:51,656 INFO L471 AbstractCegarLoop]: Abstraction has 147 states and 190 transitions. [2024-11-28 03:49:51,656 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 2.4) internal successors, (24), 8 states have internal predecessors, (24), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-11-28 03:49:51,656 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 190 transitions. [2024-11-28 03:49:51,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2024-11-28 03:49:51,658 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 03:49:51,658 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:49:51,669 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dce12f9-b7f9-4583-bc8d-da617b5b33ec/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-11-28 03:49:51,860 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dce12f9-b7f9-4583-bc8d-da617b5b33ec/bin/uautomizer-verify-aQ6SnzHsRB/cvc4 --incremental --print-success --lang smt (10)] Ended with exit code 0 [2024-11-28 03:49:52,059 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dce12f9-b7f9-4583-bc8d-da617b5b33ec/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dce12f9-b7f9-4583-bc8d-da617b5b33ec/bin/uautomizer-verify-aQ6SnzHsRB/cvc4 --incremental --print-success --lang smt [2024-11-28 03:49:52,059 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 03:49:52,060 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:49:52,060 INFO L85 PathProgramCache]: Analyzing trace with hash -728779408, now seen corresponding path program 1 times [2024-11-28 03:49:52,060 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-28 03:49:52,061 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [951106925] [2024-11-28 03:49:52,061 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 03:49:52,061 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:49:52,061 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dce12f9-b7f9-4583-bc8d-da617b5b33ec/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:49:52,063 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dce12f9-b7f9-4583-bc8d-da617b5b33ec/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:49:52,064 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dce12f9-b7f9-4583-bc8d-da617b5b33ec/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-11-28 03:49:52,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:49:52,143 INFO L256 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-11-28 03:49:52,146 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:49:52,935 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2024-11-28 03:49:52,935 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-28 03:49:52,935 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-28 03:49:52,935 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [951106925] [2024-11-28 03:49:52,935 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [951106925] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 03:49:52,935 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 03:49:52,935 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-11-28 03:49:52,935 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [728241698] [2024-11-28 03:49:52,935 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 03:49:52,936 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-28 03:49:52,936 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-28 03:49:52,936 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-28 03:49:52,936 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-28 03:49:52,937 INFO L87 Difference]: Start difference. First operand 147 states and 190 transitions. Second operand has 6 states, 5 states have (on average 4.0) internal successors, (20), 5 states have internal predecessors, (20), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2024-11-28 03:49:53,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 03:49:53,894 INFO L93 Difference]: Finished difference Result 163 states and 207 transitions. [2024-11-28 03:49:53,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-28 03:49:53,895 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 4.0) internal successors, (20), 5 states have internal predecessors, (20), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 38 [2024-11-28 03:49:53,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 03:49:53,897 INFO L225 Difference]: With dead ends: 163 [2024-11-28 03:49:53,897 INFO L226 Difference]: Without dead ends: 161 [2024-11-28 03:49:53,897 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-11-28 03:49:53,898 INFO L435 NwaCegarLoop]: 61 mSDtfsCounter, 3 mSDsluCounter, 233 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 294 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2024-11-28 03:49:53,899 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 294 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2024-11-28 03:49:53,900 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2024-11-28 03:49:53,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 153. [2024-11-28 03:49:53,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 153 states, 114 states have (on average 1.2456140350877194) internal successors, (142), 118 states have internal predecessors, (142), 23 states have call successors, (23), 13 states have call predecessors, (23), 15 states have return successors, (32), 21 states have call predecessors, (32), 22 states have call successors, (32) [2024-11-28 03:49:53,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 197 transitions. [2024-11-28 03:49:53,927 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 197 transitions. Word has length 38 [2024-11-28 03:49:53,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 03:49:53,927 INFO L471 AbstractCegarLoop]: Abstraction has 153 states and 197 transitions. [2024-11-28 03:49:53,927 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 4.0) internal successors, (20), 5 states have internal predecessors, (20), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2024-11-28 03:49:53,928 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 197 transitions. [2024-11-28 03:49:53,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2024-11-28 03:49:53,929 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 03:49:53,930 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:49:53,941 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dce12f9-b7f9-4583-bc8d-da617b5b33ec/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2024-11-28 03:49:54,130 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dce12f9-b7f9-4583-bc8d-da617b5b33ec/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:49:54,130 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 03:49:54,131 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:49:54,131 INFO L85 PathProgramCache]: Analyzing trace with hash -671521106, now seen corresponding path program 1 times [2024-11-28 03:49:54,131 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-28 03:49:54,131 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [264732683] [2024-11-28 03:49:54,131 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 03:49:54,131 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:49:54,131 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dce12f9-b7f9-4583-bc8d-da617b5b33ec/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:49:54,134 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dce12f9-b7f9-4583-bc8d-da617b5b33ec/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:49:54,136 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dce12f9-b7f9-4583-bc8d-da617b5b33ec/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-11-28 03:49:54,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:49:54,201 INFO L256 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-28 03:49:54,202 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:49:54,913 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2024-11-28 03:49:54,913 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-28 03:49:54,913 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-28 03:49:54,913 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [264732683] [2024-11-28 03:49:54,913 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [264732683] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 03:49:54,913 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 03:49:54,913 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-11-28 03:49:54,913 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [533317167] [2024-11-28 03:49:54,913 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 03:49:54,914 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-28 03:49:54,914 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-28 03:49:54,914 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-28 03:49:54,914 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-28 03:49:54,915 INFO L87 Difference]: Start difference. First operand 153 states and 197 transitions. Second operand has 6 states, 5 states have (on average 4.0) internal successors, (20), 5 states have internal predecessors, (20), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2024-11-28 03:49:55,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 03:49:55,703 INFO L93 Difference]: Finished difference Result 159 states and 202 transitions. [2024-11-28 03:49:55,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-28 03:49:55,704 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 4.0) internal successors, (20), 5 states have internal predecessors, (20), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 38 [2024-11-28 03:49:55,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 03:49:55,709 INFO L225 Difference]: With dead ends: 159 [2024-11-28 03:49:55,709 INFO L226 Difference]: Without dead ends: 157 [2024-11-28 03:49:55,710 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-11-28 03:49:55,711 INFO L435 NwaCegarLoop]: 60 mSDtfsCounter, 3 mSDsluCounter, 229 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 289 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-11-28 03:49:55,713 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 289 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-11-28 03:49:55,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2024-11-28 03:49:55,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 151. [2024-11-28 03:49:55,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151 states, 113 states have (on average 1.238938053097345) internal successors, (140), 116 states have internal predecessors, (140), 22 states have call successors, (22), 13 states have call predecessors, (22), 15 states have return successors, (31), 21 states have call predecessors, (31), 21 states have call successors, (31) [2024-11-28 03:49:55,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 193 transitions. [2024-11-28 03:49:55,749 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 193 transitions. Word has length 38 [2024-11-28 03:49:55,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 03:49:55,749 INFO L471 AbstractCegarLoop]: Abstraction has 151 states and 193 transitions. [2024-11-28 03:49:55,750 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 4.0) internal successors, (20), 5 states have internal predecessors, (20), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2024-11-28 03:49:55,750 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 193 transitions. [2024-11-28 03:49:55,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2024-11-28 03:49:55,751 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 03:49:55,751 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:49:55,761 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dce12f9-b7f9-4583-bc8d-da617b5b33ec/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2024-11-28 03:49:55,951 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dce12f9-b7f9-4583-bc8d-da617b5b33ec/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:49:55,952 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 03:49:55,952 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:49:55,952 INFO L85 PathProgramCache]: Analyzing trace with hash -791479530, now seen corresponding path program 1 times [2024-11-28 03:49:55,953 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-28 03:49:55,953 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [347553980] [2024-11-28 03:49:55,953 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 03:49:55,953 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:49:55,953 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dce12f9-b7f9-4583-bc8d-da617b5b33ec/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:49:55,955 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dce12f9-b7f9-4583-bc8d-da617b5b33ec/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:49:55,956 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dce12f9-b7f9-4583-bc8d-da617b5b33ec/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-11-28 03:49:56,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:49:56,026 INFO L256 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-11-28 03:49:56,028 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:49:57,021 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-11-28 03:49:57,022 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 03:49:57,983 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-11-28 03:49:57,983 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-28 03:49:57,983 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [347553980] [2024-11-28 03:49:57,984 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [347553980] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 03:49:57,984 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-28 03:49:57,984 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2024-11-28 03:49:57,984 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1883609164] [2024-11-28 03:49:57,984 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-28 03:49:57,984 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-11-28 03:49:57,985 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-28 03:49:57,985 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-11-28 03:49:57,985 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2024-11-28 03:49:57,986 INFO L87 Difference]: Start difference. First operand 151 states and 193 transitions. Second operand has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 8 states have internal predecessors, (31), 3 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (5), 4 states have call predecessors, (5), 2 states have call successors, (5) [2024-11-28 03:49:58,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 03:49:58,824 INFO L93 Difference]: Finished difference Result 182 states and 232 transitions. [2024-11-28 03:49:58,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-28 03:49:58,825 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 8 states have internal predecessors, (31), 3 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (5), 4 states have call predecessors, (5), 2 states have call successors, (5) Word has length 45 [2024-11-28 03:49:58,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 03:49:58,827 INFO L225 Difference]: With dead ends: 182 [2024-11-28 03:49:58,827 INFO L226 Difference]: Without dead ends: 171 [2024-11-28 03:49:58,828 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2024-11-28 03:49:58,829 INFO L435 NwaCegarLoop]: 64 mSDtfsCounter, 18 mSDsluCounter, 394 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 458 SdHoareTripleChecker+Invalid, 76 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2024-11-28 03:49:58,829 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 458 Invalid, 76 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 74 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2024-11-28 03:49:58,830 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2024-11-28 03:49:58,853 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 159. [2024-11-28 03:49:58,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 159 states, 118 states have (on average 1.2372881355932204) internal successors, (146), 122 states have internal predecessors, (146), 24 states have call successors, (24), 13 states have call predecessors, (24), 16 states have return successors, (35), 23 states have call predecessors, (35), 23 states have call successors, (35) [2024-11-28 03:49:58,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 205 transitions. [2024-11-28 03:49:58,856 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 205 transitions. Word has length 45 [2024-11-28 03:49:58,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 03:49:58,857 INFO L471 AbstractCegarLoop]: Abstraction has 159 states and 205 transitions. [2024-11-28 03:49:58,857 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 8 states have internal predecessors, (31), 3 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (5), 4 states have call predecessors, (5), 2 states have call successors, (5) [2024-11-28 03:49:58,857 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 205 transitions. [2024-11-28 03:49:58,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2024-11-28 03:49:58,859 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 03:49:58,859 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:49:58,870 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dce12f9-b7f9-4583-bc8d-da617b5b33ec/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2024-11-28 03:49:59,059 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dce12f9-b7f9-4583-bc8d-da617b5b33ec/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:49:59,060 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 03:49:59,060 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:49:59,060 INFO L85 PathProgramCache]: Analyzing trace with hash -90414952, now seen corresponding path program 1 times [2024-11-28 03:49:59,060 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-28 03:49:59,060 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [147148887] [2024-11-28 03:49:59,060 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 03:49:59,060 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:49:59,061 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dce12f9-b7f9-4583-bc8d-da617b5b33ec/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:49:59,062 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dce12f9-b7f9-4583-bc8d-da617b5b33ec/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:49:59,064 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dce12f9-b7f9-4583-bc8d-da617b5b33ec/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-11-28 03:49:59,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:49:59,135 INFO L256 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 11 conjuncts are in the unsatisfiable core [2024-11-28 03:49:59,137 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:50:00,598 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-11-28 03:50:00,599 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-28 03:50:00,599 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-28 03:50:00,599 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [147148887] [2024-11-28 03:50:00,599 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [147148887] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 03:50:00,599 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 03:50:00,599 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-11-28 03:50:00,599 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1768300601] [2024-11-28 03:50:00,599 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 03:50:00,600 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-28 03:50:00,600 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-28 03:50:00,600 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-28 03:50:00,600 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2024-11-28 03:50:00,601 INFO L87 Difference]: Start difference. First operand 159 states and 205 transitions. Second operand has 11 states, 11 states have (on average 2.6363636363636362) internal successors, (29), 9 states have internal predecessors, (29), 3 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (5), 4 states have call predecessors, (5), 2 states have call successors, (5) [2024-11-28 03:50:02,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 03:50:02,892 INFO L93 Difference]: Finished difference Result 218 states and 284 transitions. [2024-11-28 03:50:02,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-11-28 03:50:02,893 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.6363636363636362) internal successors, (29), 9 states have internal predecessors, (29), 3 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (5), 4 states have call predecessors, (5), 2 states have call successors, (5) Word has length 45 [2024-11-28 03:50:02,894 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 03:50:02,896 INFO L225 Difference]: With dead ends: 218 [2024-11-28 03:50:02,896 INFO L226 Difference]: Without dead ends: 211 [2024-11-28 03:50:02,896 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2024-11-28 03:50:02,897 INFO L435 NwaCegarLoop]: 57 mSDtfsCounter, 23 mSDsluCounter, 487 mSDsCounter, 0 mSdLazyCounter, 191 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 544 SdHoareTripleChecker+Invalid, 193 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 191 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2024-11-28 03:50:02,898 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 544 Invalid, 193 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 191 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2024-11-28 03:50:02,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2024-11-28 03:50:02,924 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 173. [2024-11-28 03:50:02,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 173 states, 128 states have (on average 1.2265625) internal successors, (157), 132 states have internal predecessors, (157), 27 states have call successors, (27), 13 states have call predecessors, (27), 17 states have return successors, (42), 27 states have call predecessors, (42), 26 states have call successors, (42) [2024-11-28 03:50:02,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 226 transitions. [2024-11-28 03:50:02,927 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 226 transitions. Word has length 45 [2024-11-28 03:50:02,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 03:50:02,930 INFO L471 AbstractCegarLoop]: Abstraction has 173 states and 226 transitions. [2024-11-28 03:50:02,930 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.6363636363636362) internal successors, (29), 9 states have internal predecessors, (29), 3 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (5), 4 states have call predecessors, (5), 2 states have call successors, (5) [2024-11-28 03:50:02,930 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 226 transitions. [2024-11-28 03:50:02,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2024-11-28 03:50:02,932 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 03:50:02,932 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:50:02,943 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dce12f9-b7f9-4583-bc8d-da617b5b33ec/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2024-11-28 03:50:03,133 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dce12f9-b7f9-4583-bc8d-da617b5b33ec/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:50:03,133 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 03:50:03,133 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:50:03,133 INFO L85 PathProgramCache]: Analyzing trace with hash -1436794082, now seen corresponding path program 1 times [2024-11-28 03:50:03,134 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-28 03:50:03,134 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [689992576] [2024-11-28 03:50:03,134 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 03:50:03,134 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:50:03,134 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dce12f9-b7f9-4583-bc8d-da617b5b33ec/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:50:03,136 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dce12f9-b7f9-4583-bc8d-da617b5b33ec/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:50:03,140 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dce12f9-b7f9-4583-bc8d-da617b5b33ec/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-11-28 03:50:03,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:50:03,210 INFO L256 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 11 conjuncts are in the unsatisfiable core [2024-11-28 03:50:03,212 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:50:04,705 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 3 proven. 8 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-11-28 03:50:04,705 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 03:50:06,319 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 3 proven. 8 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-11-28 03:50:06,319 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-28 03:50:06,319 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [689992576] [2024-11-28 03:50:06,319 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [689992576] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 03:50:06,319 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-28 03:50:06,319 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 14 [2024-11-28 03:50:06,319 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [25153054] [2024-11-28 03:50:06,320 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-28 03:50:06,320 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-11-28 03:50:06,320 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-28 03:50:06,321 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-11-28 03:50:06,321 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=154, Unknown=0, NotChecked=0, Total=182 [2024-11-28 03:50:06,321 INFO L87 Difference]: Start difference. First operand 173 states and 226 transitions. Second operand has 14 states, 14 states have (on average 2.5714285714285716) internal successors, (36), 12 states have internal predecessors, (36), 4 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (6), 5 states have call predecessors, (6), 3 states have call successors, (6) [2024-11-28 03:50:08,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 03:50:08,715 INFO L93 Difference]: Finished difference Result 225 states and 292 transitions. [2024-11-28 03:50:08,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-11-28 03:50:08,716 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.5714285714285716) internal successors, (36), 12 states have internal predecessors, (36), 4 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (6), 5 states have call predecessors, (6), 3 states have call successors, (6) Word has length 47 [2024-11-28 03:50:08,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 03:50:08,719 INFO L225 Difference]: With dead ends: 225 [2024-11-28 03:50:08,719 INFO L226 Difference]: Without dead ends: 217 [2024-11-28 03:50:08,720 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=36, Invalid=204, Unknown=0, NotChecked=0, Total=240 [2024-11-28 03:50:08,721 INFO L435 NwaCegarLoop]: 56 mSDtfsCounter, 36 mSDsluCounter, 529 mSDsCounter, 0 mSdLazyCounter, 203 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 585 SdHoareTripleChecker+Invalid, 208 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 203 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2024-11-28 03:50:08,721 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [41 Valid, 585 Invalid, 208 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 203 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2024-11-28 03:50:08,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 217 states. [2024-11-28 03:50:08,747 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 217 to 184. [2024-11-28 03:50:08,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 184 states, 137 states have (on average 1.218978102189781) internal successors, (167), 140 states have internal predecessors, (167), 28 states have call successors, (28), 13 states have call predecessors, (28), 18 states have return successors, (44), 30 states have call predecessors, (44), 27 states have call successors, (44) [2024-11-28 03:50:08,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 239 transitions. [2024-11-28 03:50:08,750 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 239 transitions. Word has length 47 [2024-11-28 03:50:08,751 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 03:50:08,751 INFO L471 AbstractCegarLoop]: Abstraction has 184 states and 239 transitions. [2024-11-28 03:50:08,751 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.5714285714285716) internal successors, (36), 12 states have internal predecessors, (36), 4 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (6), 5 states have call predecessors, (6), 3 states have call successors, (6) [2024-11-28 03:50:08,751 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 239 transitions. [2024-11-28 03:50:08,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2024-11-28 03:50:08,753 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 03:50:08,753 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:50:08,765 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dce12f9-b7f9-4583-bc8d-da617b5b33ec/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2024-11-28 03:50:08,954 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dce12f9-b7f9-4583-bc8d-da617b5b33ec/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:50:08,955 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 03:50:08,956 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:50:08,957 INFO L85 PathProgramCache]: Analyzing trace with hash -1379535780, now seen corresponding path program 1 times [2024-11-28 03:50:08,957 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-28 03:50:08,957 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1929441541] [2024-11-28 03:50:08,957 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 03:50:08,957 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:50:08,958 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dce12f9-b7f9-4583-bc8d-da617b5b33ec/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:50:08,960 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dce12f9-b7f9-4583-bc8d-da617b5b33ec/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:50:08,962 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dce12f9-b7f9-4583-bc8d-da617b5b33ec/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-11-28 03:50:09,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:50:09,024 INFO L256 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-11-28 03:50:09,026 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:50:09,397 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2024-11-28 03:50:09,397 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-28 03:50:09,397 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-28 03:50:09,398 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1929441541] [2024-11-28 03:50:09,398 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1929441541] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 03:50:09,398 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 03:50:09,398 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-11-28 03:50:09,398 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [940786812] [2024-11-28 03:50:09,398 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 03:50:09,398 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-28 03:50:09,398 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-28 03:50:09,399 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-28 03:50:09,399 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-28 03:50:09,399 INFO L87 Difference]: Start difference. First operand 184 states and 239 transitions. Second operand has 6 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2024-11-28 03:50:09,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 03:50:09,840 INFO L93 Difference]: Finished difference Result 192 states and 246 transitions. [2024-11-28 03:50:09,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-28 03:50:09,840 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) Word has length 47 [2024-11-28 03:50:09,841 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 03:50:09,842 INFO L225 Difference]: With dead ends: 192 [2024-11-28 03:50:09,843 INFO L226 Difference]: Without dead ends: 181 [2024-11-28 03:50:09,843 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-11-28 03:50:09,844 INFO L435 NwaCegarLoop]: 66 mSDtfsCounter, 3 mSDsluCounter, 251 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 317 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-28 03:50:09,844 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 317 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-28 03:50:09,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2024-11-28 03:50:09,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 181. [2024-11-28 03:50:09,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 181 states, 134 states have (on average 1.208955223880597) internal successors, (162), 138 states have internal predecessors, (162), 28 states have call successors, (28), 13 states have call predecessors, (28), 18 states have return successors, (43), 29 states have call predecessors, (43), 26 states have call successors, (43) [2024-11-28 03:50:09,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 233 transitions. [2024-11-28 03:50:09,872 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 233 transitions. Word has length 47 [2024-11-28 03:50:09,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 03:50:09,873 INFO L471 AbstractCegarLoop]: Abstraction has 181 states and 233 transitions. [2024-11-28 03:50:09,873 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2024-11-28 03:50:09,873 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 233 transitions. [2024-11-28 03:50:09,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2024-11-28 03:50:09,875 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 03:50:09,875 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:50:09,888 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dce12f9-b7f9-4583-bc8d-da617b5b33ec/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2024-11-28 03:50:10,076 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dce12f9-b7f9-4583-bc8d-da617b5b33ec/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:50:10,076 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 03:50:10,077 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:50:10,077 INFO L85 PathProgramCache]: Analyzing trace with hash -1068772726, now seen corresponding path program 1 times [2024-11-28 03:50:10,077 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-28 03:50:10,077 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1038700065] [2024-11-28 03:50:10,077 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 03:50:10,077 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:50:10,077 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dce12f9-b7f9-4583-bc8d-da617b5b33ec/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:50:10,079 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dce12f9-b7f9-4583-bc8d-da617b5b33ec/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:50:10,081 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dce12f9-b7f9-4583-bc8d-da617b5b33ec/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2024-11-28 03:50:10,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:50:10,146 INFO L256 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-11-28 03:50:10,148 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:50:11,784 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-11-28 03:50:11,784 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 03:50:13,790 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-11-28 03:50:13,791 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-28 03:50:13,791 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1038700065] [2024-11-28 03:50:13,791 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1038700065] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 03:50:13,791 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-28 03:50:13,791 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 16 [2024-11-28 03:50:13,791 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1973978992] [2024-11-28 03:50:13,791 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-28 03:50:13,792 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-11-28 03:50:13,792 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-28 03:50:13,792 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-11-28 03:50:13,793 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=207, Unknown=0, NotChecked=0, Total=240 [2024-11-28 03:50:13,793 INFO L87 Difference]: Start difference. First operand 181 states and 233 transitions. Second operand has 16 states, 15 states have (on average 2.466666666666667) internal successors, (37), 14 states have internal predecessors, (37), 4 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2024-11-28 03:50:19,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 03:50:19,671 INFO L93 Difference]: Finished difference Result 257 states and 341 transitions. [2024-11-28 03:50:19,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2024-11-28 03:50:19,672 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 2.466666666666667) internal successors, (37), 14 states have internal predecessors, (37), 4 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) Word has length 48 [2024-11-28 03:50:19,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 03:50:19,674 INFO L225 Difference]: With dead ends: 257 [2024-11-28 03:50:19,674 INFO L226 Difference]: Without dead ends: 250 [2024-11-28 03:50:19,675 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=81, Invalid=519, Unknown=0, NotChecked=0, Total=600 [2024-11-28 03:50:19,676 INFO L435 NwaCegarLoop]: 75 mSDtfsCounter, 44 mSDsluCounter, 868 mSDsCounter, 0 mSdLazyCounter, 359 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 943 SdHoareTripleChecker+Invalid, 371 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 359 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.8s IncrementalHoareTripleChecker+Time [2024-11-28 03:50:19,676 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [57 Valid, 943 Invalid, 371 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 359 Invalid, 0 Unknown, 0 Unchecked, 3.8s Time] [2024-11-28 03:50:19,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 250 states. [2024-11-28 03:50:19,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 250 to 191. [2024-11-28 03:50:19,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 191 states, 140 states have (on average 1.2) internal successors, (168), 146 states have internal predecessors, (168), 30 states have call successors, (30), 13 states have call predecessors, (30), 20 states have return successors, (49), 31 states have call predecessors, (49), 28 states have call successors, (49) [2024-11-28 03:50:19,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 247 transitions. [2024-11-28 03:50:19,726 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 247 transitions. Word has length 48 [2024-11-28 03:50:19,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 03:50:19,726 INFO L471 AbstractCegarLoop]: Abstraction has 191 states and 247 transitions. [2024-11-28 03:50:19,727 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 2.466666666666667) internal successors, (37), 14 states have internal predecessors, (37), 4 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2024-11-28 03:50:19,727 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 247 transitions. [2024-11-28 03:50:19,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2024-11-28 03:50:19,729 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 03:50:19,729 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:50:19,742 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dce12f9-b7f9-4583-bc8d-da617b5b33ec/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2024-11-28 03:50:19,933 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dce12f9-b7f9-4583-bc8d-da617b5b33ec/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:50:19,933 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 03:50:19,934 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:50:19,934 INFO L85 PathProgramCache]: Analyzing trace with hash 1040574150, now seen corresponding path program 1 times [2024-11-28 03:50:19,934 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-28 03:50:19,934 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1343760155] [2024-11-28 03:50:19,934 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 03:50:19,934 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:50:19,935 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dce12f9-b7f9-4583-bc8d-da617b5b33ec/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:50:19,936 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dce12f9-b7f9-4583-bc8d-da617b5b33ec/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:50:19,938 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dce12f9-b7f9-4583-bc8d-da617b5b33ec/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2024-11-28 03:50:20,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:50:20,007 INFO L256 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-11-28 03:50:20,008 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:50:21,941 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-11-28 03:50:21,941 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 03:50:26,229 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-11-28 03:50:26,229 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-28 03:50:26,230 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1343760155] [2024-11-28 03:50:26,230 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1343760155] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 03:50:26,230 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-28 03:50:26,230 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2024-11-28 03:50:26,230 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [332556718] [2024-11-28 03:50:26,230 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-28 03:50:26,231 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-11-28 03:50:26,231 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-28 03:50:26,231 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-11-28 03:50:26,232 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=496, Unknown=0, NotChecked=0, Total=552 [2024-11-28 03:50:26,232 INFO L87 Difference]: Start difference. First operand 191 states and 247 transitions. Second operand has 24 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 20 states have internal predecessors, (43), 4 states have call successors, (7), 2 states have call predecessors, (7), 5 states have return successors, (7), 5 states have call predecessors, (7), 3 states have call successors, (7) [2024-11-28 03:50:36,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 03:50:36,546 INFO L93 Difference]: Finished difference Result 271 states and 371 transitions. [2024-11-28 03:50:36,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2024-11-28 03:50:36,548 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 20 states have internal predecessors, (43), 4 states have call successors, (7), 2 states have call predecessors, (7), 5 states have return successors, (7), 5 states have call predecessors, (7), 3 states have call successors, (7) Word has length 48 [2024-11-28 03:50:36,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 03:50:36,551 INFO L225 Difference]: With dead ends: 271 [2024-11-28 03:50:36,551 INFO L226 Difference]: Without dead ends: 256 [2024-11-28 03:50:36,552 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 171 ImplicationChecksByTransitivity, 9.5s TimeCoverageRelationStatistics Valid=156, Invalid=1404, Unknown=0, NotChecked=0, Total=1560 [2024-11-28 03:50:36,553 INFO L435 NwaCegarLoop]: 69 mSDtfsCounter, 56 mSDsluCounter, 959 mSDsCounter, 0 mSdLazyCounter, 515 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 1028 SdHoareTripleChecker+Invalid, 534 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 515 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.8s IncrementalHoareTripleChecker+Time [2024-11-28 03:50:36,553 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [72 Valid, 1028 Invalid, 534 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 515 Invalid, 0 Unknown, 0 Unchecked, 5.8s Time] [2024-11-28 03:50:36,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 256 states. [2024-11-28 03:50:36,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 256 to 197. [2024-11-28 03:50:36,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 197 states, 144 states have (on average 1.2013888888888888) internal successors, (173), 153 states have internal predecessors, (173), 30 states have call successors, (30), 13 states have call predecessors, (30), 22 states have return successors, (58), 30 states have call predecessors, (58), 28 states have call successors, (58) [2024-11-28 03:50:36,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 261 transitions. [2024-11-28 03:50:36,601 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 261 transitions. Word has length 48 [2024-11-28 03:50:36,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 03:50:36,601 INFO L471 AbstractCegarLoop]: Abstraction has 197 states and 261 transitions. [2024-11-28 03:50:36,602 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 20 states have internal predecessors, (43), 4 states have call successors, (7), 2 states have call predecessors, (7), 5 states have return successors, (7), 5 states have call predecessors, (7), 3 states have call successors, (7) [2024-11-28 03:50:36,602 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 261 transitions. [2024-11-28 03:50:36,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2024-11-28 03:50:36,603 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 03:50:36,604 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:50:36,616 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dce12f9-b7f9-4583-bc8d-da617b5b33ec/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2024-11-28 03:50:36,804 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dce12f9-b7f9-4583-bc8d-da617b5b33ec/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:50:36,804 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 03:50:36,805 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:50:36,805 INFO L85 PathProgramCache]: Analyzing trace with hash 1222699312, now seen corresponding path program 2 times [2024-11-28 03:50:36,805 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-28 03:50:36,805 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [166905587] [2024-11-28 03:50:36,805 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 03:50:36,805 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:50:36,805 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dce12f9-b7f9-4583-bc8d-da617b5b33ec/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:50:36,808 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dce12f9-b7f9-4583-bc8d-da617b5b33ec/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:50:36,809 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dce12f9-b7f9-4583-bc8d-da617b5b33ec/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2024-11-28 03:50:36,872 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 03:50:36,872 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:50:36,874 INFO L256 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 11 conjuncts are in the unsatisfiable core [2024-11-28 03:50:36,875 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:50:38,301 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 3 proven. 8 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-11-28 03:50:38,301 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 03:50:39,906 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 3 proven. 8 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-11-28 03:50:39,906 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-28 03:50:39,906 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [166905587] [2024-11-28 03:50:39,907 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [166905587] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 03:50:39,907 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-28 03:50:39,907 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 14 [2024-11-28 03:50:39,907 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [778286507] [2024-11-28 03:50:39,907 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-28 03:50:39,907 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-11-28 03:50:39,907 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-28 03:50:39,908 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-11-28 03:50:39,908 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=154, Unknown=0, NotChecked=0, Total=182 [2024-11-28 03:50:39,908 INFO L87 Difference]: Start difference. First operand 197 states and 261 transitions. Second operand has 14 states, 14 states have (on average 2.642857142857143) internal successors, (37), 12 states have internal predecessors, (37), 4 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (6), 5 states have call predecessors, (6), 3 states have call successors, (6) [2024-11-28 03:50:45,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 03:50:45,012 INFO L93 Difference]: Finished difference Result 255 states and 355 transitions. [2024-11-28 03:50:45,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2024-11-28 03:50:45,013 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.642857142857143) internal successors, (37), 12 states have internal predecessors, (37), 4 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (6), 5 states have call predecessors, (6), 3 states have call successors, (6) Word has length 48 [2024-11-28 03:50:45,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 03:50:45,015 INFO L225 Difference]: With dead ends: 255 [2024-11-28 03:50:45,015 INFO L226 Difference]: Without dead ends: 248 [2024-11-28 03:50:45,015 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 85 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=62, Invalid=358, Unknown=0, NotChecked=0, Total=420 [2024-11-28 03:50:45,016 INFO L435 NwaCegarLoop]: 86 mSDtfsCounter, 72 mSDsluCounter, 772 mSDsCounter, 0 mSdLazyCounter, 348 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 79 SdHoareTripleChecker+Valid, 858 SdHoareTripleChecker+Invalid, 366 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 348 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.7s IncrementalHoareTripleChecker+Time [2024-11-28 03:50:45,017 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [79 Valid, 858 Invalid, 366 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 348 Invalid, 0 Unknown, 0 Unchecked, 3.7s Time] [2024-11-28 03:50:45,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 248 states. [2024-11-28 03:50:45,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 248 to 199. [2024-11-28 03:50:45,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 199 states, 145 states have (on average 1.2) internal successors, (174), 154 states have internal predecessors, (174), 31 states have call successors, (31), 13 states have call predecessors, (31), 22 states have return successors, (59), 31 states have call predecessors, (59), 29 states have call successors, (59) [2024-11-28 03:50:45,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 264 transitions. [2024-11-28 03:50:45,068 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 264 transitions. Word has length 48 [2024-11-28 03:50:45,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 03:50:45,069 INFO L471 AbstractCegarLoop]: Abstraction has 199 states and 264 transitions. [2024-11-28 03:50:45,069 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.642857142857143) internal successors, (37), 12 states have internal predecessors, (37), 4 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (6), 5 states have call predecessors, (6), 3 states have call successors, (6) [2024-11-28 03:50:45,069 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 264 transitions. [2024-11-28 03:50:45,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2024-11-28 03:50:45,071 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 03:50:45,071 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:50:45,078 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dce12f9-b7f9-4583-bc8d-da617b5b33ec/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2024-11-28 03:50:45,271 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dce12f9-b7f9-4583-bc8d-da617b5b33ec/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:50:45,272 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 03:50:45,272 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:50:45,272 INFO L85 PathProgramCache]: Analyzing trace with hash -488645562, now seen corresponding path program 1 times [2024-11-28 03:50:45,272 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-28 03:50:45,272 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1269416940] [2024-11-28 03:50:45,272 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 03:50:45,273 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:50:45,273 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dce12f9-b7f9-4583-bc8d-da617b5b33ec/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:50:45,275 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dce12f9-b7f9-4583-bc8d-da617b5b33ec/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:50:45,276 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dce12f9-b7f9-4583-bc8d-da617b5b33ec/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2024-11-28 03:50:45,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:50:45,340 INFO L256 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 21 conjuncts are in the unsatisfiable core [2024-11-28 03:50:45,342 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:50:48,243 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-28 03:50:48,243 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-28 03:50:48,243 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-28 03:50:48,243 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1269416940] [2024-11-28 03:50:48,243 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1269416940] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 03:50:48,243 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 03:50:48,243 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2024-11-28 03:50:48,244 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [125119233] [2024-11-28 03:50:48,244 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 03:50:48,244 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-11-28 03:50:48,244 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-28 03:50:48,245 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-11-28 03:50:48,245 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=153, Unknown=0, NotChecked=0, Total=182 [2024-11-28 03:50:48,245 INFO L87 Difference]: Start difference. First operand 199 states and 264 transitions. Second operand has 14 states, 12 states have (on average 2.5) internal successors, (30), 11 states have internal predecessors, (30), 5 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2024-11-28 03:50:51,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 03:50:51,584 INFO L93 Difference]: Finished difference Result 298 states and 404 transitions. [2024-11-28 03:50:51,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-11-28 03:50:51,585 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 12 states have (on average 2.5) internal successors, (30), 11 states have internal predecessors, (30), 5 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) Word has length 48 [2024-11-28 03:50:51,586 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 03:50:51,588 INFO L225 Difference]: With dead ends: 298 [2024-11-28 03:50:51,588 INFO L226 Difference]: Without dead ends: 239 [2024-11-28 03:50:51,589 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=53, Invalid=289, Unknown=0, NotChecked=0, Total=342 [2024-11-28 03:50:51,590 INFO L435 NwaCegarLoop]: 86 mSDtfsCounter, 32 mSDsluCounter, 794 mSDsCounter, 0 mSdLazyCounter, 189 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 880 SdHoareTripleChecker+Invalid, 194 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 189 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2024-11-28 03:50:51,591 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [40 Valid, 880 Invalid, 194 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 189 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2024-11-28 03:50:51,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 239 states. [2024-11-28 03:50:51,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 239 to 218. [2024-11-28 03:50:51,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 218 states, 159 states have (on average 1.1761006289308176) internal successors, (187), 168 states have internal predecessors, (187), 35 states have call successors, (35), 14 states have call predecessors, (35), 23 states have return successors, (63), 35 states have call predecessors, (63), 33 states have call successors, (63) [2024-11-28 03:50:51,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 218 states to 218 states and 285 transitions. [2024-11-28 03:50:51,652 INFO L78 Accepts]: Start accepts. Automaton has 218 states and 285 transitions. Word has length 48 [2024-11-28 03:50:51,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 03:50:51,652 INFO L471 AbstractCegarLoop]: Abstraction has 218 states and 285 transitions. [2024-11-28 03:50:51,653 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 12 states have (on average 2.5) internal successors, (30), 11 states have internal predecessors, (30), 5 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2024-11-28 03:50:51,653 INFO L276 IsEmpty]: Start isEmpty. Operand 218 states and 285 transitions. [2024-11-28 03:50:51,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2024-11-28 03:50:51,655 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 03:50:51,655 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:50:51,669 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dce12f9-b7f9-4583-bc8d-da617b5b33ec/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2024-11-28 03:50:51,859 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dce12f9-b7f9-4583-bc8d-da617b5b33ec/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:50:51,860 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 03:50:51,861 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:50:51,861 INFO L85 PathProgramCache]: Analyzing trace with hash -1744006774, now seen corresponding path program 1 times [2024-11-28 03:50:51,861 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-28 03:50:51,861 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [61962850] [2024-11-28 03:50:51,861 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 03:50:51,862 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:50:51,862 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dce12f9-b7f9-4583-bc8d-da617b5b33ec/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:50:51,864 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dce12f9-b7f9-4583-bc8d-da617b5b33ec/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:50:51,868 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dce12f9-b7f9-4583-bc8d-da617b5b33ec/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2024-11-28 03:50:51,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:50:51,946 INFO L256 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 18 conjuncts are in the unsatisfiable core [2024-11-28 03:50:51,948 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:50:54,713 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2024-11-28 03:50:54,713 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 03:50:57,311 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-28 03:50:57,311 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [61962850] [2024-11-28 03:50:57,311 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [61962850] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 03:50:57,311 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1264806594] [2024-11-28 03:50:57,311 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 03:50:57,311 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-11-28 03:50:57,312 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dce12f9-b7f9-4583-bc8d-da617b5b33ec/bin/uautomizer-verify-aQ6SnzHsRB/cvc4 [2024-11-28 03:50:57,314 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dce12f9-b7f9-4583-bc8d-da617b5b33ec/bin/uautomizer-verify-aQ6SnzHsRB/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2024-11-28 03:50:57,315 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dce12f9-b7f9-4583-bc8d-da617b5b33ec/bin/uautomizer-verify-aQ6SnzHsRB/cvc4 --incremental --print-success --lang smt (22)] Waiting until timeout for monitored process [2024-11-28 03:50:57,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:50:57,433 INFO L256 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-11-28 03:50:57,434 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:50:58,478 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2024-11-28 03:50:58,478 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 03:51:00,350 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1264806594] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 03:51:00,350 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-28 03:51:00,350 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 13 [2024-11-28 03:51:00,350 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [133014806] [2024-11-28 03:51:00,350 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-28 03:51:00,351 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-11-28 03:51:00,351 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-28 03:51:00,351 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-11-28 03:51:00,352 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=359, Unknown=0, NotChecked=0, Total=420 [2024-11-28 03:51:00,352 INFO L87 Difference]: Start difference. First operand 218 states and 285 transitions. Second operand has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 11 states have internal predecessors, (35), 4 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) [2024-11-28 03:51:04,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 03:51:04,287 INFO L93 Difference]: Finished difference Result 290 states and 375 transitions. [2024-11-28 03:51:04,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-11-28 03:51:04,288 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 11 states have internal predecessors, (35), 4 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) Word has length 48 [2024-11-28 03:51:04,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 03:51:04,290 INFO L225 Difference]: With dead ends: 290 [2024-11-28 03:51:04,291 INFO L226 Difference]: Without dead ends: 238 [2024-11-28 03:51:04,291 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 93 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 6.8s TimeCoverageRelationStatistics Valid=99, Invalid=501, Unknown=0, NotChecked=0, Total=600 [2024-11-28 03:51:04,292 INFO L435 NwaCegarLoop]: 83 mSDtfsCounter, 38 mSDsluCounter, 824 mSDsCounter, 0 mSdLazyCounter, 255 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 907 SdHoareTripleChecker+Invalid, 259 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 255 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2024-11-28 03:51:04,293 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [40 Valid, 907 Invalid, 259 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 255 Invalid, 0 Unknown, 0 Unchecked, 2.9s Time] [2024-11-28 03:51:04,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 238 states. [2024-11-28 03:51:04,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 238 to 224. [2024-11-28 03:51:04,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 224 states, 164 states have (on average 1.1646341463414633) internal successors, (191), 173 states have internal predecessors, (191), 35 states have call successors, (35), 15 states have call predecessors, (35), 24 states have return successors, (63), 35 states have call predecessors, (63), 33 states have call successors, (63) [2024-11-28 03:51:04,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 289 transitions. [2024-11-28 03:51:04,336 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 289 transitions. Word has length 48 [2024-11-28 03:51:04,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 03:51:04,336 INFO L471 AbstractCegarLoop]: Abstraction has 224 states and 289 transitions. [2024-11-28 03:51:04,337 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 11 states have internal predecessors, (35), 4 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) [2024-11-28 03:51:04,337 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 289 transitions. [2024-11-28 03:51:04,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2024-11-28 03:51:04,338 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 03:51:04,338 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:51:04,342 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dce12f9-b7f9-4583-bc8d-da617b5b33ec/bin/uautomizer-verify-aQ6SnzHsRB/cvc4 --incremental --print-success --lang smt (22)] Forceful destruction successful, exit code 0 [2024-11-28 03:51:04,547 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dce12f9-b7f9-4583-bc8d-da617b5b33ec/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2024-11-28 03:51:04,739 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dce12f9-b7f9-4583-bc8d-da617b5b33ec/bin/uautomizer-verify-aQ6SnzHsRB/cvc4 --incremental --print-success --lang smt,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dce12f9-b7f9-4583-bc8d-da617b5b33ec/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:51:04,740 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 03:51:04,740 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:51:04,740 INFO L85 PathProgramCache]: Analyzing trace with hash -1238443660, now seen corresponding path program 2 times [2024-11-28 03:51:04,740 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-28 03:51:04,740 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1640262728] [2024-11-28 03:51:04,740 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 03:51:04,741 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:51:04,741 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dce12f9-b7f9-4583-bc8d-da617b5b33ec/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:51:04,743 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dce12f9-b7f9-4583-bc8d-da617b5b33ec/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:51:04,745 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dce12f9-b7f9-4583-bc8d-da617b5b33ec/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2024-11-28 03:51:04,815 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 03:51:04,815 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:51:04,816 INFO L256 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-11-28 03:51:04,818 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:51:06,680 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-11-28 03:51:06,680 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 03:51:11,326 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-11-28 03:51:11,326 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-28 03:51:11,326 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1640262728] [2024-11-28 03:51:11,326 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1640262728] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 03:51:11,326 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-28 03:51:11,327 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2024-11-28 03:51:11,327 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1046016547] [2024-11-28 03:51:11,327 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-28 03:51:11,328 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-11-28 03:51:11,328 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-28 03:51:11,329 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-11-28 03:51:11,329 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=496, Unknown=0, NotChecked=0, Total=552 [2024-11-28 03:51:11,329 INFO L87 Difference]: Start difference. First operand 224 states and 289 transitions. Second operand has 24 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 20 states have internal predecessors, (43), 4 states have call successors, (7), 2 states have call predecessors, (7), 5 states have return successors, (7), 5 states have call predecessors, (7), 3 states have call successors, (7) [2024-11-28 03:51:21,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 03:51:21,230 INFO L93 Difference]: Finished difference Result 288 states and 385 transitions. [2024-11-28 03:51:21,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2024-11-28 03:51:21,231 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 20 states have internal predecessors, (43), 4 states have call successors, (7), 2 states have call predecessors, (7), 5 states have return successors, (7), 5 states have call predecessors, (7), 3 states have call successors, (7) Word has length 48 [2024-11-28 03:51:21,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 03:51:21,234 INFO L225 Difference]: With dead ends: 288 [2024-11-28 03:51:21,234 INFO L226 Difference]: Without dead ends: 275 [2024-11-28 03:51:21,235 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 9.1s TimeCoverageRelationStatistics Valid=137, Invalid=1269, Unknown=0, NotChecked=0, Total=1406 [2024-11-28 03:51:21,236 INFO L435 NwaCegarLoop]: 69 mSDtfsCounter, 69 mSDsluCounter, 1045 mSDsCounter, 0 mSdLazyCounter, 540 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 83 SdHoareTripleChecker+Valid, 1114 SdHoareTripleChecker+Invalid, 562 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 540 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.0s IncrementalHoareTripleChecker+Time [2024-11-28 03:51:21,236 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [83 Valid, 1114 Invalid, 562 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 540 Invalid, 0 Unknown, 0 Unchecked, 6.0s Time] [2024-11-28 03:51:21,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 275 states. [2024-11-28 03:51:21,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 275 to 234. [2024-11-28 03:51:21,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 234 states, 170 states have (on average 1.1588235294117648) internal successors, (197), 181 states have internal predecessors, (197), 37 states have call successors, (37), 15 states have call predecessors, (37), 26 states have return successors, (71), 37 states have call predecessors, (71), 35 states have call successors, (71) [2024-11-28 03:51:21,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 234 states to 234 states and 305 transitions. [2024-11-28 03:51:21,298 INFO L78 Accepts]: Start accepts. Automaton has 234 states and 305 transitions. Word has length 48 [2024-11-28 03:51:21,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 03:51:21,298 INFO L471 AbstractCegarLoop]: Abstraction has 234 states and 305 transitions. [2024-11-28 03:51:21,298 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 20 states have internal predecessors, (43), 4 states have call successors, (7), 2 states have call predecessors, (7), 5 states have return successors, (7), 5 states have call predecessors, (7), 3 states have call successors, (7) [2024-11-28 03:51:21,299 INFO L276 IsEmpty]: Start isEmpty. Operand 234 states and 305 transitions. [2024-11-28 03:51:21,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2024-11-28 03:51:21,300 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 03:51:21,300 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:51:21,317 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dce12f9-b7f9-4583-bc8d-da617b5b33ec/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2024-11-28 03:51:21,501 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dce12f9-b7f9-4583-bc8d-da617b5b33ec/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:51:21,501 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 03:51:21,501 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:51:21,502 INFO L85 PathProgramCache]: Analyzing trace with hash -1928720180, now seen corresponding path program 1 times [2024-11-28 03:51:21,502 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-28 03:51:21,502 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [820594048] [2024-11-28 03:51:21,502 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 03:51:21,502 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:51:21,502 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dce12f9-b7f9-4583-bc8d-da617b5b33ec/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:51:21,507 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dce12f9-b7f9-4583-bc8d-da617b5b33ec/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:51:21,509 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dce12f9-b7f9-4583-bc8d-da617b5b33ec/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2024-11-28 03:51:21,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:51:21,586 INFO L256 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 19 conjuncts are in the unsatisfiable core [2024-11-28 03:51:21,589 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:51:24,213 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2024-11-28 03:51:24,213 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-28 03:51:24,213 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-28 03:51:24,213 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [820594048] [2024-11-28 03:51:24,213 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [820594048] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 03:51:24,214 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 03:51:24,214 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2024-11-28 03:51:24,214 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1429607550] [2024-11-28 03:51:24,214 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 03:51:24,214 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-11-28 03:51:24,214 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-28 03:51:24,215 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-11-28 03:51:24,215 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=156, Unknown=0, NotChecked=0, Total=182 [2024-11-28 03:51:24,215 INFO L87 Difference]: Start difference. First operand 234 states and 305 transitions. Second operand has 14 states, 13 states have (on average 2.4615384615384617) internal successors, (32), 12 states have internal predecessors, (32), 4 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2024-11-28 03:51:28,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 03:51:28,987 INFO L93 Difference]: Finished difference Result 301 states and 394 transitions. [2024-11-28 03:51:28,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-11-28 03:51:28,988 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 2.4615384615384617) internal successors, (32), 12 states have internal predecessors, (32), 4 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) Word has length 48 [2024-11-28 03:51:28,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 03:51:28,990 INFO L225 Difference]: With dead ends: 301 [2024-11-28 03:51:28,991 INFO L226 Difference]: Without dead ends: 249 [2024-11-28 03:51:28,991 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=61, Invalid=319, Unknown=0, NotChecked=0, Total=380 [2024-11-28 03:51:28,993 INFO L435 NwaCegarLoop]: 84 mSDtfsCounter, 40 mSDsluCounter, 911 mSDsCounter, 0 mSdLazyCounter, 300 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 995 SdHoareTripleChecker+Invalid, 305 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 300 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.5s IncrementalHoareTripleChecker+Time [2024-11-28 03:51:28,993 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [42 Valid, 995 Invalid, 305 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 300 Invalid, 0 Unknown, 0 Unchecked, 3.5s Time] [2024-11-28 03:51:28,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 249 states. [2024-11-28 03:51:29,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 249 to 234. [2024-11-28 03:51:29,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 234 states, 170 states have (on average 1.1529411764705881) internal successors, (196), 181 states have internal predecessors, (196), 37 states have call successors, (37), 15 states have call predecessors, (37), 26 states have return successors, (71), 37 states have call predecessors, (71), 35 states have call successors, (71) [2024-11-28 03:51:29,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 234 states to 234 states and 304 transitions. [2024-11-28 03:51:29,050 INFO L78 Accepts]: Start accepts. Automaton has 234 states and 304 transitions. Word has length 48 [2024-11-28 03:51:29,051 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 03:51:29,051 INFO L471 AbstractCegarLoop]: Abstraction has 234 states and 304 transitions. [2024-11-28 03:51:29,051 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 2.4615384615384617) internal successors, (32), 12 states have internal predecessors, (32), 4 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2024-11-28 03:51:29,051 INFO L276 IsEmpty]: Start isEmpty. Operand 234 states and 304 transitions. [2024-11-28 03:51:29,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2024-11-28 03:51:29,053 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 03:51:29,053 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:51:29,068 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dce12f9-b7f9-4583-bc8d-da617b5b33ec/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2024-11-28 03:51:29,257 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dce12f9-b7f9-4583-bc8d-da617b5b33ec/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:51:29,257 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 03:51:29,258 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:51:29,258 INFO L85 PathProgramCache]: Analyzing trace with hash 1347550551, now seen corresponding path program 1 times [2024-11-28 03:51:29,258 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-28 03:51:29,258 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2146699844] [2024-11-28 03:51:29,258 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 03:51:29,258 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:51:29,258 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dce12f9-b7f9-4583-bc8d-da617b5b33ec/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:51:29,261 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dce12f9-b7f9-4583-bc8d-da617b5b33ec/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:51:29,263 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dce12f9-b7f9-4583-bc8d-da617b5b33ec/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2024-11-28 03:51:29,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:51:29,328 INFO L256 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-11-28 03:51:29,330 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:51:30,289 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2024-11-28 03:51:30,290 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-28 03:51:30,290 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-28 03:51:30,290 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2146699844] [2024-11-28 03:51:30,290 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2146699844] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 03:51:30,290 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 03:51:30,290 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-11-28 03:51:30,290 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1416605337] [2024-11-28 03:51:30,290 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 03:51:30,291 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-11-28 03:51:30,291 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-28 03:51:30,291 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-11-28 03:51:30,292 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2024-11-28 03:51:30,292 INFO L87 Difference]: Start difference. First operand 234 states and 304 transitions. Second operand has 9 states, 9 states have (on average 3.5555555555555554) internal successors, (32), 7 states have internal predecessors, (32), 3 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) [2024-11-28 03:51:31,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 03:51:31,407 INFO L93 Difference]: Finished difference Result 298 states and 379 transitions. [2024-11-28 03:51:31,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-28 03:51:31,408 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.5555555555555554) internal successors, (32), 7 states have internal predecessors, (32), 3 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) Word has length 50 [2024-11-28 03:51:31,408 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 03:51:31,410 INFO L225 Difference]: With dead ends: 298 [2024-11-28 03:51:31,410 INFO L226 Difference]: Without dead ends: 247 [2024-11-28 03:51:31,411 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2024-11-28 03:51:31,413 INFO L435 NwaCegarLoop]: 63 mSDtfsCounter, 11 mSDsluCounter, 422 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 485 SdHoareTripleChecker+Invalid, 74 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2024-11-28 03:51:31,413 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 485 Invalid, 74 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2024-11-28 03:51:31,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 247 states. [2024-11-28 03:51:31,473 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 247 to 232. [2024-11-28 03:51:31,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 232 states, 169 states have (on average 1.1538461538461537) internal successors, (195), 180 states have internal predecessors, (195), 36 states have call successors, (36), 15 states have call predecessors, (36), 26 states have return successors, (69), 36 states have call predecessors, (69), 34 states have call successors, (69) [2024-11-28 03:51:31,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 232 states to 232 states and 300 transitions. [2024-11-28 03:51:31,476 INFO L78 Accepts]: Start accepts. Automaton has 232 states and 300 transitions. Word has length 50 [2024-11-28 03:51:31,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 03:51:31,476 INFO L471 AbstractCegarLoop]: Abstraction has 232 states and 300 transitions. [2024-11-28 03:51:31,476 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.5555555555555554) internal successors, (32), 7 states have internal predecessors, (32), 3 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) [2024-11-28 03:51:31,477 INFO L276 IsEmpty]: Start isEmpty. Operand 232 states and 300 transitions. [2024-11-28 03:51:31,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2024-11-28 03:51:31,478 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 03:51:31,478 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:51:31,490 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dce12f9-b7f9-4583-bc8d-da617b5b33ec/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2024-11-28 03:51:31,679 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dce12f9-b7f9-4583-bc8d-da617b5b33ec/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:51:31,679 INFO L396 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 03:51:31,679 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:51:31,679 INFO L85 PathProgramCache]: Analyzing trace with hash 815133349, now seen corresponding path program 1 times [2024-11-28 03:51:31,680 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-28 03:51:31,680 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1012118421] [2024-11-28 03:51:31,680 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 03:51:31,680 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:51:31,680 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dce12f9-b7f9-4583-bc8d-da617b5b33ec/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:51:31,682 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dce12f9-b7f9-4583-bc8d-da617b5b33ec/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:51:31,683 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dce12f9-b7f9-4583-bc8d-da617b5b33ec/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2024-11-28 03:51:31,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:51:31,738 INFO L256 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 13 conjuncts are in the unsatisfiable core [2024-11-28 03:51:31,740 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:51:33,432 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 9 proven. 3 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-28 03:51:33,432 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 03:51:34,843 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-28 03:51:34,844 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-28 03:51:34,844 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1012118421] [2024-11-28 03:51:34,844 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1012118421] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-28 03:51:34,844 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-28 03:51:34,844 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [12] total 16 [2024-11-28 03:51:34,844 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1590502102] [2024-11-28 03:51:34,844 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 03:51:34,845 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-28 03:51:34,845 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-28 03:51:34,845 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-28 03:51:34,845 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2024-11-28 03:51:34,846 INFO L87 Difference]: Start difference. First operand 232 states and 300 transitions. Second operand has 8 states, 8 states have (on average 4.5) internal successors, (36), 6 states have internal predecessors, (36), 3 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) [2024-11-28 03:51:35,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 03:51:35,841 INFO L93 Difference]: Finished difference Result 304 states and 398 transitions. [2024-11-28 03:51:35,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-28 03:51:35,842 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.5) internal successors, (36), 6 states have internal predecessors, (36), 3 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) Word has length 53 [2024-11-28 03:51:35,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 03:51:35,844 INFO L225 Difference]: With dead ends: 304 [2024-11-28 03:51:35,845 INFO L226 Difference]: Without dead ends: 268 [2024-11-28 03:51:35,845 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 91 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2024-11-28 03:51:35,846 INFO L435 NwaCegarLoop]: 71 mSDtfsCounter, 22 mSDsluCounter, 402 mSDsCounter, 0 mSdLazyCounter, 65 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 473 SdHoareTripleChecker+Invalid, 67 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 65 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2024-11-28 03:51:35,846 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 473 Invalid, 67 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 65 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2024-11-28 03:51:35,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 268 states. [2024-11-28 03:51:35,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 268 to 253. [2024-11-28 03:51:35,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 253 states, 184 states have (on average 1.1630434782608696) internal successors, (214), 195 states have internal predecessors, (214), 41 states have call successors, (41), 16 states have call predecessors, (41), 27 states have return successors, (72), 41 states have call predecessors, (72), 38 states have call successors, (72) [2024-11-28 03:51:35,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 253 states to 253 states and 327 transitions. [2024-11-28 03:51:35,916 INFO L78 Accepts]: Start accepts. Automaton has 253 states and 327 transitions. Word has length 53 [2024-11-28 03:51:35,916 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 03:51:35,917 INFO L471 AbstractCegarLoop]: Abstraction has 253 states and 327 transitions. [2024-11-28 03:51:35,917 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.5) internal successors, (36), 6 states have internal predecessors, (36), 3 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) [2024-11-28 03:51:35,917 INFO L276 IsEmpty]: Start isEmpty. Operand 253 states and 327 transitions. [2024-11-28 03:51:35,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2024-11-28 03:51:35,919 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 03:51:35,919 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:51:35,932 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dce12f9-b7f9-4583-bc8d-da617b5b33ec/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Ended with exit code 0 [2024-11-28 03:51:36,119 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dce12f9-b7f9-4583-bc8d-da617b5b33ec/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:51:36,120 INFO L396 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 03:51:36,120 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:51:36,121 INFO L85 PathProgramCache]: Analyzing trace with hash -1100274711, now seen corresponding path program 1 times [2024-11-28 03:51:36,121 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-28 03:51:36,121 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1492004972] [2024-11-28 03:51:36,121 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 03:51:36,121 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:51:36,121 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dce12f9-b7f9-4583-bc8d-da617b5b33ec/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:51:36,123 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dce12f9-b7f9-4583-bc8d-da617b5b33ec/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:51:36,125 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dce12f9-b7f9-4583-bc8d-da617b5b33ec/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2024-11-28 03:51:36,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:51:36,196 INFO L256 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-11-28 03:51:36,197 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:51:36,997 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2024-11-28 03:51:36,998 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 03:51:37,545 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-28 03:51:37,546 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-28 03:51:37,546 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1492004972] [2024-11-28 03:51:37,546 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1492004972] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 03:51:37,546 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-28 03:51:37,546 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2024-11-28 03:51:37,546 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2078524720] [2024-11-28 03:51:37,546 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-28 03:51:37,547 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-28 03:51:37,547 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-28 03:51:37,547 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-28 03:51:37,547 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2024-11-28 03:51:37,548 INFO L87 Difference]: Start difference. First operand 253 states and 327 transitions. Second operand has 8 states, 8 states have (on average 4.875) internal successors, (39), 6 states have internal predecessors, (39), 3 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2024-11-28 03:51:38,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 03:51:38,104 INFO L93 Difference]: Finished difference Result 317 states and 397 transitions. [2024-11-28 03:51:38,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-28 03:51:38,105 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.875) internal successors, (39), 6 states have internal predecessors, (39), 3 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) Word has length 53 [2024-11-28 03:51:38,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 03:51:38,108 INFO L225 Difference]: With dead ends: 317 [2024-11-28 03:51:38,108 INFO L226 Difference]: Without dead ends: 231 [2024-11-28 03:51:38,109 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 99 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2024-11-28 03:51:38,109 INFO L435 NwaCegarLoop]: 65 mSDtfsCounter, 6 mSDsluCounter, 374 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 439 SdHoareTripleChecker+Invalid, 45 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-28 03:51:38,110 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 439 Invalid, 45 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-11-28 03:51:38,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 231 states. [2024-11-28 03:51:38,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 231 to 231. [2024-11-28 03:51:38,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 231 states, 169 states have (on average 1.1715976331360947) internal successors, (198), 180 states have internal predecessors, (198), 36 states have call successors, (36), 14 states have call predecessors, (36), 25 states have return successors, (67), 36 states have call predecessors, (67), 35 states have call successors, (67) [2024-11-28 03:51:38,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 231 states to 231 states and 301 transitions. [2024-11-28 03:51:38,168 INFO L78 Accepts]: Start accepts. Automaton has 231 states and 301 transitions. Word has length 53 [2024-11-28 03:51:38,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 03:51:38,168 INFO L471 AbstractCegarLoop]: Abstraction has 231 states and 301 transitions. [2024-11-28 03:51:38,169 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.875) internal successors, (39), 6 states have internal predecessors, (39), 3 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2024-11-28 03:51:38,169 INFO L276 IsEmpty]: Start isEmpty. Operand 231 states and 301 transitions. [2024-11-28 03:51:38,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2024-11-28 03:51:38,170 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 03:51:38,170 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:51:38,183 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dce12f9-b7f9-4583-bc8d-da617b5b33ec/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2024-11-28 03:51:38,371 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dce12f9-b7f9-4583-bc8d-da617b5b33ec/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:51:38,371 INFO L396 AbstractCegarLoop]: === Iteration 25 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 03:51:38,371 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:51:38,371 INFO L85 PathProgramCache]: Analyzing trace with hash 1110885904, now seen corresponding path program 1 times [2024-11-28 03:51:38,372 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-28 03:51:38,372 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1424251265] [2024-11-28 03:51:38,372 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 03:51:38,372 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:51:38,372 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dce12f9-b7f9-4583-bc8d-da617b5b33ec/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:51:38,374 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dce12f9-b7f9-4583-bc8d-da617b5b33ec/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:51:38,376 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dce12f9-b7f9-4583-bc8d-da617b5b33ec/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2024-11-28 03:51:38,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:51:38,444 INFO L256 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 11 conjuncts are in the unsatisfiable core [2024-11-28 03:51:38,445 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:51:40,658 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2024-11-28 03:51:40,658 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 03:51:42,575 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-28 03:51:42,576 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1424251265] [2024-11-28 03:51:42,576 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1424251265] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 03:51:42,576 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1433519715] [2024-11-28 03:51:42,576 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 03:51:42,576 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-11-28 03:51:42,576 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dce12f9-b7f9-4583-bc8d-da617b5b33ec/bin/uautomizer-verify-aQ6SnzHsRB/cvc4 [2024-11-28 03:51:42,579 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dce12f9-b7f9-4583-bc8d-da617b5b33ec/bin/uautomizer-verify-aQ6SnzHsRB/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2024-11-28 03:51:42,581 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dce12f9-b7f9-4583-bc8d-da617b5b33ec/bin/uautomizer-verify-aQ6SnzHsRB/cvc4 --incremental --print-success --lang smt (29)] Waiting until timeout for monitored process [2024-11-28 03:51:42,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:51:42,717 INFO L256 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-28 03:51:42,719 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:51:43,372 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2024-11-28 03:51:43,372 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-28 03:51:43,372 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1433519715] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 03:51:43,372 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-28 03:51:43,372 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [10] total 10 [2024-11-28 03:51:43,373 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [818317097] [2024-11-28 03:51:43,373 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 03:51:43,373 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-28 03:51:43,373 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-28 03:51:43,373 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-28 03:51:43,374 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2024-11-28 03:51:43,374 INFO L87 Difference]: Start difference. First operand 231 states and 301 transitions. Second operand has 8 states, 7 states have (on average 4.0) internal successors, (28), 7 states have internal predecessors, (28), 3 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-11-28 03:51:44,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 03:51:44,892 INFO L93 Difference]: Finished difference Result 265 states and 349 transitions. [2024-11-28 03:51:44,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-28 03:51:44,893 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 4.0) internal successors, (28), 7 states have internal predecessors, (28), 3 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 48 [2024-11-28 03:51:44,894 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 03:51:44,895 INFO L225 Difference]: With dead ends: 265 [2024-11-28 03:51:44,895 INFO L226 Difference]: Without dead ends: 263 [2024-11-28 03:51:44,896 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 89 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=56, Invalid=184, Unknown=0, NotChecked=0, Total=240 [2024-11-28 03:51:44,896 INFO L435 NwaCegarLoop]: 64 mSDtfsCounter, 10 mSDsluCounter, 238 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 302 SdHoareTripleChecker+Invalid, 50 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2024-11-28 03:51:44,897 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 302 Invalid, 50 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2024-11-28 03:51:44,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 263 states. [2024-11-28 03:51:44,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 263 to 237. [2024-11-28 03:51:44,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 237 states, 172 states have (on average 1.1686046511627908) internal successors, (201), 185 states have internal predecessors, (201), 38 states have call successors, (38), 15 states have call predecessors, (38), 26 states have return successors, (69), 36 states have call predecessors, (69), 37 states have call successors, (69) [2024-11-28 03:51:44,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 237 states to 237 states and 308 transitions. [2024-11-28 03:51:44,957 INFO L78 Accepts]: Start accepts. Automaton has 237 states and 308 transitions. Word has length 48 [2024-11-28 03:51:44,958 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 03:51:44,958 INFO L471 AbstractCegarLoop]: Abstraction has 237 states and 308 transitions. [2024-11-28 03:51:44,958 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 4.0) internal successors, (28), 7 states have internal predecessors, (28), 3 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-11-28 03:51:44,958 INFO L276 IsEmpty]: Start isEmpty. Operand 237 states and 308 transitions. [2024-11-28 03:51:44,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2024-11-28 03:51:44,960 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 03:51:44,961 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:51:44,974 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dce12f9-b7f9-4583-bc8d-da617b5b33ec/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Ended with exit code 0 [2024-11-28 03:51:45,163 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dce12f9-b7f9-4583-bc8d-da617b5b33ec/bin/uautomizer-verify-aQ6SnzHsRB/cvc4 --incremental --print-success --lang smt (29)] Ended with exit code 0 [2024-11-28 03:51:45,362 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dce12f9-b7f9-4583-bc8d-da617b5b33ec/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dce12f9-b7f9-4583-bc8d-da617b5b33ec/bin/uautomizer-verify-aQ6SnzHsRB/cvc4 --incremental --print-success --lang smt [2024-11-28 03:51:45,362 INFO L396 AbstractCegarLoop]: === Iteration 26 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 03:51:45,363 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:51:45,363 INFO L85 PathProgramCache]: Analyzing trace with hash 1800794983, now seen corresponding path program 1 times [2024-11-28 03:51:45,363 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-28 03:51:45,363 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [592824346] [2024-11-28 03:51:45,363 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 03:51:45,363 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:51:45,363 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dce12f9-b7f9-4583-bc8d-da617b5b33ec/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:51:45,365 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dce12f9-b7f9-4583-bc8d-da617b5b33ec/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:51:45,367 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dce12f9-b7f9-4583-bc8d-da617b5b33ec/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2024-11-28 03:51:45,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:51:45,432 INFO L256 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-28 03:51:45,434 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:51:46,583 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-28 03:51:46,583 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 03:51:48,438 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-28 03:51:48,438 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-28 03:51:48,438 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [592824346] [2024-11-28 03:51:48,438 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [592824346] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 03:51:48,439 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-28 03:51:48,439 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2024-11-28 03:51:48,439 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1626255749] [2024-11-28 03:51:48,439 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-28 03:51:48,439 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-11-28 03:51:48,439 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-28 03:51:48,440 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-11-28 03:51:48,440 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=177, Unknown=0, NotChecked=0, Total=210 [2024-11-28 03:51:48,440 INFO L87 Difference]: Start difference. First operand 237 states and 308 transitions. Second operand has 15 states, 15 states have (on average 2.6666666666666665) internal successors, (40), 11 states have internal predecessors, (40), 5 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) [2024-11-28 03:51:50,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 03:51:50,283 INFO L93 Difference]: Finished difference Result 322 states and 405 transitions. [2024-11-28 03:51:50,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-28 03:51:50,284 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.6666666666666665) internal successors, (40), 11 states have internal predecessors, (40), 5 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) Word has length 49 [2024-11-28 03:51:50,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 03:51:50,288 INFO L225 Difference]: With dead ends: 322 [2024-11-28 03:51:50,292 INFO L226 Difference]: Without dead ends: 243 [2024-11-28 03:51:50,293 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 83 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=53, Invalid=253, Unknown=0, NotChecked=0, Total=306 [2024-11-28 03:51:50,293 INFO L435 NwaCegarLoop]: 85 mSDtfsCounter, 39 mSDsluCounter, 688 mSDsCounter, 0 mSdLazyCounter, 120 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 773 SdHoareTripleChecker+Invalid, 123 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 120 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2024-11-28 03:51:50,294 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [41 Valid, 773 Invalid, 123 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 120 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2024-11-28 03:51:50,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 243 states. [2024-11-28 03:51:50,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 243 to 225. [2024-11-28 03:51:50,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 225 states, 165 states have (on average 1.1636363636363636) internal successors, (192), 176 states have internal predecessors, (192), 35 states have call successors, (35), 15 states have call predecessors, (35), 24 states have return successors, (64), 33 states have call predecessors, (64), 34 states have call successors, (64) [2024-11-28 03:51:50,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 225 states to 225 states and 291 transitions. [2024-11-28 03:51:50,353 INFO L78 Accepts]: Start accepts. Automaton has 225 states and 291 transitions. Word has length 49 [2024-11-28 03:51:50,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 03:51:50,353 INFO L471 AbstractCegarLoop]: Abstraction has 225 states and 291 transitions. [2024-11-28 03:51:50,354 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.6666666666666665) internal successors, (40), 11 states have internal predecessors, (40), 5 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) [2024-11-28 03:51:50,354 INFO L276 IsEmpty]: Start isEmpty. Operand 225 states and 291 transitions. [2024-11-28 03:51:50,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2024-11-28 03:51:50,355 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 03:51:50,355 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:51:50,369 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dce12f9-b7f9-4583-bc8d-da617b5b33ec/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Ended with exit code 0 [2024-11-28 03:51:50,556 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dce12f9-b7f9-4583-bc8d-da617b5b33ec/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:51:50,556 INFO L396 AbstractCegarLoop]: === Iteration 27 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 03:51:50,557 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:51:50,557 INFO L85 PathProgramCache]: Analyzing trace with hash 108154785, now seen corresponding path program 1 times [2024-11-28 03:51:50,557 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-28 03:51:50,557 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [533353540] [2024-11-28 03:51:50,557 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 03:51:50,558 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:51:50,558 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dce12f9-b7f9-4583-bc8d-da617b5b33ec/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:51:50,560 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dce12f9-b7f9-4583-bc8d-da617b5b33ec/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:51:50,561 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dce12f9-b7f9-4583-bc8d-da617b5b33ec/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2024-11-28 03:51:50,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:51:50,633 INFO L256 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-11-28 03:51:50,634 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:51:51,913 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2024-11-28 03:51:51,913 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-28 03:51:51,913 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-28 03:51:51,913 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [533353540] [2024-11-28 03:51:51,913 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [533353540] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 03:51:51,913 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 03:51:51,913 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-11-28 03:51:51,913 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [782771062] [2024-11-28 03:51:51,914 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 03:51:51,914 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-11-28 03:51:51,914 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-28 03:51:51,915 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-11-28 03:51:51,915 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2024-11-28 03:51:51,915 INFO L87 Difference]: Start difference. First operand 225 states and 291 transitions. Second operand has 10 states, 9 states have (on average 3.6666666666666665) internal successors, (33), 8 states have internal predecessors, (33), 4 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2024-11-28 03:51:54,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 03:51:54,155 INFO L93 Difference]: Finished difference Result 274 states and 343 transitions. [2024-11-28 03:51:54,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-11-28 03:51:54,156 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 3.6666666666666665) internal successors, (33), 8 states have internal predecessors, (33), 4 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) Word has length 49 [2024-11-28 03:51:54,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 03:51:54,158 INFO L225 Difference]: With dead ends: 274 [2024-11-28 03:51:54,158 INFO L226 Difference]: Without dead ends: 229 [2024-11-28 03:51:54,159 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2024-11-28 03:51:54,160 INFO L435 NwaCegarLoop]: 78 mSDtfsCounter, 34 mSDsluCounter, 589 mSDsCounter, 0 mSdLazyCounter, 121 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 667 SdHoareTripleChecker+Invalid, 124 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 121 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2024-11-28 03:51:54,160 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [36 Valid, 667 Invalid, 124 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 121 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2024-11-28 03:51:54,161 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 229 states. [2024-11-28 03:51:54,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 229 to 218. [2024-11-28 03:51:54,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 218 states, 161 states have (on average 1.1614906832298137) internal successors, (187), 171 states have internal predecessors, (187), 33 states have call successors, (33), 15 states have call predecessors, (33), 23 states have return successors, (60), 31 states have call predecessors, (60), 32 states have call successors, (60) [2024-11-28 03:51:54,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 218 states to 218 states and 280 transitions. [2024-11-28 03:51:54,218 INFO L78 Accepts]: Start accepts. Automaton has 218 states and 280 transitions. Word has length 49 [2024-11-28 03:51:54,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 03:51:54,218 INFO L471 AbstractCegarLoop]: Abstraction has 218 states and 280 transitions. [2024-11-28 03:51:54,219 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 3.6666666666666665) internal successors, (33), 8 states have internal predecessors, (33), 4 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2024-11-28 03:51:54,219 INFO L276 IsEmpty]: Start isEmpty. Operand 218 states and 280 transitions. [2024-11-28 03:51:54,221 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2024-11-28 03:51:54,222 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 03:51:54,222 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:51:54,235 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dce12f9-b7f9-4583-bc8d-da617b5b33ec/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2024-11-28 03:51:54,422 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dce12f9-b7f9-4583-bc8d-da617b5b33ec/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:51:54,423 INFO L396 AbstractCegarLoop]: === Iteration 28 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 03:51:54,423 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:51:54,423 INFO L85 PathProgramCache]: Analyzing trace with hash -153337123, now seen corresponding path program 1 times [2024-11-28 03:51:54,423 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-28 03:51:54,423 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1950413757] [2024-11-28 03:51:54,424 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 03:51:54,424 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:51:54,424 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dce12f9-b7f9-4583-bc8d-da617b5b33ec/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:51:54,426 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dce12f9-b7f9-4583-bc8d-da617b5b33ec/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:51:54,428 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dce12f9-b7f9-4583-bc8d-da617b5b33ec/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2024-11-28 03:51:54,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:51:54,501 INFO L256 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjuncts are in the unsatisfiable core [2024-11-28 03:51:54,502 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:52:05,557 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2024-11-28 03:52:05,558 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 03:52:07,390 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-28 03:52:07,390 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1950413757] [2024-11-28 03:52:07,390 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1950413757] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 03:52:07,390 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1615886609] [2024-11-28 03:52:07,390 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 03:52:07,391 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-11-28 03:52:07,391 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dce12f9-b7f9-4583-bc8d-da617b5b33ec/bin/uautomizer-verify-aQ6SnzHsRB/cvc4 [2024-11-28 03:52:07,393 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dce12f9-b7f9-4583-bc8d-da617b5b33ec/bin/uautomizer-verify-aQ6SnzHsRB/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2024-11-28 03:52:07,395 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dce12f9-b7f9-4583-bc8d-da617b5b33ec/bin/uautomizer-verify-aQ6SnzHsRB/cvc4 --incremental --print-success --lang smt (33)] Waiting until timeout for monitored process [2024-11-28 03:52:07,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:52:07,558 INFO L256 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-28 03:52:07,560 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:52:08,265 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2024-11-28 03:52:08,265 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-28 03:52:08,266 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1615886609] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 03:52:08,266 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-28 03:52:08,266 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [10] total 10 [2024-11-28 03:52:08,266 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1664414658] [2024-11-28 03:52:08,266 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 03:52:08,267 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-28 03:52:08,267 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-28 03:52:08,267 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-28 03:52:08,267 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=162, Unknown=2, NotChecked=0, Total=210 [2024-11-28 03:52:08,268 INFO L87 Difference]: Start difference. First operand 218 states and 280 transitions. Second operand has 8 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 states have internal predecessors, (29), 3 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-11-28 03:52:12,377 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2024-11-28 03:52:16,404 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2024-11-28 03:52:23,095 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] [2024-11-28 03:52:24,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 03:52:24,704 INFO L93 Difference]: Finished difference Result 250 states and 321 transitions. [2024-11-28 03:52:24,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-28 03:52:24,705 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 states have internal predecessors, (29), 3 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 49 [2024-11-28 03:52:24,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 03:52:24,708 INFO L225 Difference]: With dead ends: 250 [2024-11-28 03:52:24,708 INFO L226 Difference]: Without dead ends: 246 [2024-11-28 03:52:24,709 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 92 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 13.7s TimeCoverageRelationStatistics Valid=81, Invalid=259, Unknown=2, NotChecked=0, Total=342 [2024-11-28 03:52:24,710 INFO L435 NwaCegarLoop]: 65 mSDtfsCounter, 15 mSDsluCounter, 295 mSDsCounter, 0 mSdLazyCounter, 65 mSolverCounterSat, 1 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 14.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 360 SdHoareTripleChecker+Invalid, 69 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 65 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 14.9s IncrementalHoareTripleChecker+Time [2024-11-28 03:52:24,710 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 360 Invalid, 69 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 65 Invalid, 3 Unknown, 0 Unchecked, 14.9s Time] [2024-11-28 03:52:24,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 246 states. [2024-11-28 03:52:24,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 246 to 220. [2024-11-28 03:52:24,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 220 states, 163 states have (on average 1.1533742331288344) internal successors, (188), 172 states have internal predecessors, (188), 33 states have call successors, (33), 16 states have call predecessors, (33), 23 states have return successors, (60), 31 states have call predecessors, (60), 32 states have call successors, (60) [2024-11-28 03:52:24,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 220 states to 220 states and 281 transitions. [2024-11-28 03:52:24,783 INFO L78 Accepts]: Start accepts. Automaton has 220 states and 281 transitions. Word has length 49 [2024-11-28 03:52:24,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 03:52:24,784 INFO L471 AbstractCegarLoop]: Abstraction has 220 states and 281 transitions. [2024-11-28 03:52:24,784 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 states have internal predecessors, (29), 3 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-11-28 03:52:24,784 INFO L276 IsEmpty]: Start isEmpty. Operand 220 states and 281 transitions. [2024-11-28 03:52:24,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2024-11-28 03:52:24,786 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 03:52:24,786 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:52:24,802 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dce12f9-b7f9-4583-bc8d-da617b5b33ec/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Ended with exit code 0 [2024-11-28 03:52:24,989 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dce12f9-b7f9-4583-bc8d-da617b5b33ec/bin/uautomizer-verify-aQ6SnzHsRB/cvc4 --incremental --print-success --lang smt (33)] Ended with exit code 0 [2024-11-28 03:52:25,187 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dce12f9-b7f9-4583-bc8d-da617b5b33ec/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dce12f9-b7f9-4583-bc8d-da617b5b33ec/bin/uautomizer-verify-aQ6SnzHsRB/cvc4 --incremental --print-success --lang smt [2024-11-28 03:52:25,187 INFO L396 AbstractCegarLoop]: === Iteration 29 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 03:52:25,188 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:52:25,188 INFO L85 PathProgramCache]: Analyzing trace with hash 1453789880, now seen corresponding path program 1 times [2024-11-28 03:52:25,188 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-28 03:52:25,188 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1674940649] [2024-11-28 03:52:25,188 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 03:52:25,188 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:52:25,188 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dce12f9-b7f9-4583-bc8d-da617b5b33ec/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:52:25,191 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dce12f9-b7f9-4583-bc8d-da617b5b33ec/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:52:25,193 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dce12f9-b7f9-4583-bc8d-da617b5b33ec/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2024-11-28 03:52:25,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:52:25,261 INFO L256 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-11-28 03:52:25,262 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:52:26,258 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-11-28 03:52:26,258 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 03:52:28,180 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-11-28 03:52:28,180 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-28 03:52:28,180 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1674940649] [2024-11-28 03:52:28,180 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1674940649] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 03:52:28,180 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-28 03:52:28,180 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2024-11-28 03:52:28,180 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [313477722] [2024-11-28 03:52:28,180 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-28 03:52:28,181 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-11-28 03:52:28,181 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-28 03:52:28,181 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-11-28 03:52:28,182 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2024-11-28 03:52:28,182 INFO L87 Difference]: Start difference. First operand 220 states and 281 transitions. Second operand has 13 states, 13 states have (on average 3.3076923076923075) internal successors, (43), 11 states have internal predecessors, (43), 4 states have call successors, (9), 2 states have call predecessors, (9), 4 states have return successors, (9), 6 states have call predecessors, (9), 3 states have call successors, (9) [2024-11-28 03:52:29,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 03:52:29,133 INFO L93 Difference]: Finished difference Result 247 states and 314 transitions. [2024-11-28 03:52:29,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-28 03:52:29,134 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.3076923076923075) internal successors, (43), 11 states have internal predecessors, (43), 4 states have call successors, (9), 2 states have call predecessors, (9), 4 states have return successors, (9), 6 states have call predecessors, (9), 3 states have call successors, (9) Word has length 50 [2024-11-28 03:52:29,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 03:52:29,136 INFO L225 Difference]: With dead ends: 247 [2024-11-28 03:52:29,136 INFO L226 Difference]: Without dead ends: 234 [2024-11-28 03:52:29,137 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 87 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2024-11-28 03:52:29,137 INFO L435 NwaCegarLoop]: 74 mSDtfsCounter, 8 mSDsluCounter, 485 mSDsCounter, 0 mSdLazyCounter, 88 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 559 SdHoareTripleChecker+Invalid, 89 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 88 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2024-11-28 03:52:29,137 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 559 Invalid, 89 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 88 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2024-11-28 03:52:29,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 234 states. [2024-11-28 03:52:29,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 234 to 223. [2024-11-28 03:52:29,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 223 states, 165 states have (on average 1.1515151515151516) internal successors, (190), 175 states have internal predecessors, (190), 33 states have call successors, (33), 16 states have call predecessors, (33), 24 states have return successors, (63), 31 states have call predecessors, (63), 32 states have call successors, (63) [2024-11-28 03:52:29,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 223 states to 223 states and 286 transitions. [2024-11-28 03:52:29,180 INFO L78 Accepts]: Start accepts. Automaton has 223 states and 286 transitions. Word has length 50 [2024-11-28 03:52:29,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 03:52:29,180 INFO L471 AbstractCegarLoop]: Abstraction has 223 states and 286 transitions. [2024-11-28 03:52:29,180 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.3076923076923075) internal successors, (43), 11 states have internal predecessors, (43), 4 states have call successors, (9), 2 states have call predecessors, (9), 4 states have return successors, (9), 6 states have call predecessors, (9), 3 states have call successors, (9) [2024-11-28 03:52:29,180 INFO L276 IsEmpty]: Start isEmpty. Operand 223 states and 286 transitions. [2024-11-28 03:52:29,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2024-11-28 03:52:29,182 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 03:52:29,182 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:52:29,195 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dce12f9-b7f9-4583-bc8d-da617b5b33ec/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Ended with exit code 0 [2024-11-28 03:52:29,383 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dce12f9-b7f9-4583-bc8d-da617b5b33ec/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:52:29,383 INFO L396 AbstractCegarLoop]: === Iteration 30 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 03:52:29,383 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:52:29,384 INFO L85 PathProgramCache]: Analyzing trace with hash -1472593412, now seen corresponding path program 1 times [2024-11-28 03:52:29,384 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-28 03:52:29,384 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1215330295] [2024-11-28 03:52:29,384 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 03:52:29,384 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:52:29,384 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dce12f9-b7f9-4583-bc8d-da617b5b33ec/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:52:29,386 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dce12f9-b7f9-4583-bc8d-da617b5b33ec/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:52:29,388 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dce12f9-b7f9-4583-bc8d-da617b5b33ec/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2024-11-28 03:52:29,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:52:29,463 INFO L256 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-11-28 03:52:29,464 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:52:30,921 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-11-28 03:52:30,921 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 03:52:33,699 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-11-28 03:52:33,700 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-28 03:52:33,700 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1215330295] [2024-11-28 03:52:33,700 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1215330295] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 03:52:33,700 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-28 03:52:33,700 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2024-11-28 03:52:33,700 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [937210349] [2024-11-28 03:52:33,700 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-28 03:52:33,701 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-11-28 03:52:33,701 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-28 03:52:33,701 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-11-28 03:52:33,701 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=203, Unknown=0, NotChecked=0, Total=240 [2024-11-28 03:52:33,702 INFO L87 Difference]: Start difference. First operand 223 states and 286 transitions. Second operand has 16 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 4 states have call successors, (7), 2 states have call predecessors, (7), 4 states have return successors, (7), 4 states have call predecessors, (7), 3 states have call successors, (7) [2024-11-28 03:52:36,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 03:52:36,837 INFO L93 Difference]: Finished difference Result 266 states and 348 transitions. [2024-11-28 03:52:36,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-11-28 03:52:36,838 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 4 states have call successors, (7), 2 states have call predecessors, (7), 4 states have return successors, (7), 4 states have call predecessors, (7), 3 states have call successors, (7) Word has length 50 [2024-11-28 03:52:36,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 03:52:36,840 INFO L225 Difference]: With dead ends: 266 [2024-11-28 03:52:36,841 INFO L226 Difference]: Without dead ends: 241 [2024-11-28 03:52:36,841 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=64, Invalid=356, Unknown=0, NotChecked=0, Total=420 [2024-11-28 03:52:36,842 INFO L435 NwaCegarLoop]: 61 mSDtfsCounter, 30 mSDsluCounter, 622 mSDsCounter, 0 mSdLazyCounter, 228 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 683 SdHoareTripleChecker+Invalid, 233 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 228 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2024-11-28 03:52:36,842 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [36 Valid, 683 Invalid, 233 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 228 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2024-11-28 03:52:36,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 241 states. [2024-11-28 03:52:36,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 241 to 215. [2024-11-28 03:52:36,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 215 states, 158 states have (on average 1.1582278481012658) internal successors, (183), 170 states have internal predecessors, (183), 32 states have call successors, (32), 14 states have call predecessors, (32), 24 states have return successors, (63), 30 states have call predecessors, (63), 31 states have call successors, (63) [2024-11-28 03:52:36,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215 states to 215 states and 278 transitions. [2024-11-28 03:52:36,899 INFO L78 Accepts]: Start accepts. Automaton has 215 states and 278 transitions. Word has length 50 [2024-11-28 03:52:36,900 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 03:52:36,900 INFO L471 AbstractCegarLoop]: Abstraction has 215 states and 278 transitions. [2024-11-28 03:52:36,900 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 4 states have call successors, (7), 2 states have call predecessors, (7), 4 states have return successors, (7), 4 states have call predecessors, (7), 3 states have call successors, (7) [2024-11-28 03:52:36,900 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states and 278 transitions. [2024-11-28 03:52:36,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2024-11-28 03:52:36,902 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 03:52:36,902 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:52:36,913 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dce12f9-b7f9-4583-bc8d-da617b5b33ec/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Ended with exit code 0 [2024-11-28 03:52:37,102 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dce12f9-b7f9-4583-bc8d-da617b5b33ec/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:52:37,102 INFO L396 AbstractCegarLoop]: === Iteration 31 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 03:52:37,103 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:52:37,103 INFO L85 PathProgramCache]: Analyzing trace with hash -1942137556, now seen corresponding path program 1 times [2024-11-28 03:52:37,103 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-28 03:52:37,103 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2030865235] [2024-11-28 03:52:37,103 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 03:52:37,103 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:52:37,103 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dce12f9-b7f9-4583-bc8d-da617b5b33ec/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:52:37,108 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dce12f9-b7f9-4583-bc8d-da617b5b33ec/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:52:37,111 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dce12f9-b7f9-4583-bc8d-da617b5b33ec/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2024-11-28 03:52:37,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:52:37,208 INFO L256 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-28 03:52:37,210 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:52:38,074 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2024-11-28 03:52:38,074 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 03:52:39,533 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2024-11-28 03:52:39,533 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-28 03:52:39,534 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2030865235] [2024-11-28 03:52:39,534 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2030865235] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 03:52:39,534 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-28 03:52:39,534 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2024-11-28 03:52:39,534 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2095426962] [2024-11-28 03:52:39,534 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-28 03:52:39,534 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-28 03:52:39,535 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-28 03:52:39,535 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-28 03:52:39,535 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-11-28 03:52:39,535 INFO L87 Difference]: Start difference. First operand 215 states and 278 transitions. Second operand has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 11 states have internal predecessors, (37), 3 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2024-11-28 03:52:41,696 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 03:52:41,696 INFO L93 Difference]: Finished difference Result 255 states and 345 transitions. [2024-11-28 03:52:41,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-28 03:52:41,697 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 11 states have internal predecessors, (37), 3 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) Word has length 53 [2024-11-28 03:52:41,697 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 03:52:41,699 INFO L225 Difference]: With dead ends: 255 [2024-11-28 03:52:41,699 INFO L226 Difference]: Without dead ends: 237 [2024-11-28 03:52:41,700 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 95 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2024-11-28 03:52:41,700 INFO L435 NwaCegarLoop]: 60 mSDtfsCounter, 60 mSDsluCounter, 427 mSDsCounter, 0 mSdLazyCounter, 120 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 487 SdHoareTripleChecker+Invalid, 132 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 120 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2024-11-28 03:52:41,700 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [60 Valid, 487 Invalid, 132 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 120 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2024-11-28 03:52:41,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 237 states. [2024-11-28 03:52:41,758 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 237 to 218. [2024-11-28 03:52:41,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 218 states, 160 states have (on average 1.15) internal successors, (184), 173 states have internal predecessors, (184), 32 states have call successors, (32), 14 states have call predecessors, (32), 25 states have return successors, (67), 30 states have call predecessors, (67), 31 states have call successors, (67) [2024-11-28 03:52:41,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 218 states to 218 states and 283 transitions. [2024-11-28 03:52:41,761 INFO L78 Accepts]: Start accepts. Automaton has 218 states and 283 transitions. Word has length 53 [2024-11-28 03:52:41,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 03:52:41,761 INFO L471 AbstractCegarLoop]: Abstraction has 218 states and 283 transitions. [2024-11-28 03:52:41,762 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 11 states have internal predecessors, (37), 3 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2024-11-28 03:52:41,762 INFO L276 IsEmpty]: Start isEmpty. Operand 218 states and 283 transitions. [2024-11-28 03:52:41,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2024-11-28 03:52:41,763 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 03:52:41,764 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:52:41,776 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dce12f9-b7f9-4583-bc8d-da617b5b33ec/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Ended with exit code 0 [2024-11-28 03:52:41,968 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dce12f9-b7f9-4583-bc8d-da617b5b33ec/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:52:41,968 INFO L396 AbstractCegarLoop]: === Iteration 32 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 03:52:41,969 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:52:41,969 INFO L85 PathProgramCache]: Analyzing trace with hash 822896616, now seen corresponding path program 1 times [2024-11-28 03:52:41,969 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-28 03:52:41,969 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [988444480] [2024-11-28 03:52:41,969 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 03:52:41,969 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:52:41,970 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dce12f9-b7f9-4583-bc8d-da617b5b33ec/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:52:41,972 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dce12f9-b7f9-4583-bc8d-da617b5b33ec/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:52:41,973 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dce12f9-b7f9-4583-bc8d-da617b5b33ec/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2024-11-28 03:52:42,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:52:42,052 INFO L256 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-11-28 03:52:42,054 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:52:43,880 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-28 03:52:43,880 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 03:52:47,172 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-28 03:52:47,173 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-28 03:52:47,173 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [988444480] [2024-11-28 03:52:47,173 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [988444480] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 03:52:47,173 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-28 03:52:47,173 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2024-11-28 03:52:47,173 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [216541626] [2024-11-28 03:52:47,173 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-28 03:52:47,174 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-11-28 03:52:47,174 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-28 03:52:47,175 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-11-28 03:52:47,175 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2024-11-28 03:52:47,175 INFO L87 Difference]: Start difference. First operand 218 states and 283 transitions. Second operand has 18 states, 18 states have (on average 3.0) internal successors, (54), 16 states have internal predecessors, (54), 7 states have call successors, (10), 2 states have call predecessors, (10), 5 states have return successors, (10), 9 states have call predecessors, (10), 6 states have call successors, (10) [2024-11-28 03:52:49,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 03:52:49,485 INFO L93 Difference]: Finished difference Result 258 states and 343 transitions. [2024-11-28 03:52:49,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-11-28 03:52:49,486 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.0) internal successors, (54), 16 states have internal predecessors, (54), 7 states have call successors, (10), 2 states have call predecessors, (10), 5 states have return successors, (10), 9 states have call predecessors, (10), 6 states have call successors, (10) Word has length 62 [2024-11-28 03:52:49,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 03:52:49,488 INFO L225 Difference]: With dead ends: 258 [2024-11-28 03:52:49,488 INFO L226 Difference]: Without dead ends: 249 [2024-11-28 03:52:49,489 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 105 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=56, Invalid=286, Unknown=0, NotChecked=0, Total=342 [2024-11-28 03:52:49,489 INFO L435 NwaCegarLoop]: 81 mSDtfsCounter, 29 mSDsluCounter, 685 mSDsCounter, 0 mSdLazyCounter, 168 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 766 SdHoareTripleChecker+Invalid, 173 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 168 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2024-11-28 03:52:49,490 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [33 Valid, 766 Invalid, 173 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 168 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2024-11-28 03:52:49,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 249 states. [2024-11-28 03:52:49,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 249 to 234. [2024-11-28 03:52:49,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 234 states, 170 states have (on average 1.1529411764705881) internal successors, (196), 187 states have internal predecessors, (196), 35 states have call successors, (35), 14 states have call predecessors, (35), 28 states have return successors, (86), 32 states have call predecessors, (86), 34 states have call successors, (86) [2024-11-28 03:52:49,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 234 states to 234 states and 317 transitions. [2024-11-28 03:52:49,563 INFO L78 Accepts]: Start accepts. Automaton has 234 states and 317 transitions. Word has length 62 [2024-11-28 03:52:49,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 03:52:49,563 INFO L471 AbstractCegarLoop]: Abstraction has 234 states and 317 transitions. [2024-11-28 03:52:49,563 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.0) internal successors, (54), 16 states have internal predecessors, (54), 7 states have call successors, (10), 2 states have call predecessors, (10), 5 states have return successors, (10), 9 states have call predecessors, (10), 6 states have call successors, (10) [2024-11-28 03:52:49,564 INFO L276 IsEmpty]: Start isEmpty. Operand 234 states and 317 transitions. [2024-11-28 03:52:49,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2024-11-28 03:52:49,565 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 03:52:49,566 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:52:49,578 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dce12f9-b7f9-4583-bc8d-da617b5b33ec/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Ended with exit code 0 [2024-11-28 03:52:49,766 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dce12f9-b7f9-4583-bc8d-da617b5b33ec/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:52:49,767 INFO L396 AbstractCegarLoop]: === Iteration 33 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 03:52:49,767 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:52:49,767 INFO L85 PathProgramCache]: Analyzing trace with hash 1558668195, now seen corresponding path program 1 times [2024-11-28 03:52:49,767 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-28 03:52:49,767 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [430454018] [2024-11-28 03:52:49,767 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 03:52:49,767 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:52:49,767 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dce12f9-b7f9-4583-bc8d-da617b5b33ec/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:52:49,769 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dce12f9-b7f9-4583-bc8d-da617b5b33ec/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:52:49,771 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dce12f9-b7f9-4583-bc8d-da617b5b33ec/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2024-11-28 03:52:49,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:52:49,847 INFO L256 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-28 03:52:49,853 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:52:50,852 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2024-11-28 03:52:50,852 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 03:52:52,434 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2024-11-28 03:52:52,434 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-28 03:52:52,434 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [430454018] [2024-11-28 03:52:52,435 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [430454018] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 03:52:52,435 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-28 03:52:52,435 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2024-11-28 03:52:52,435 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [732046239] [2024-11-28 03:52:52,435 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-28 03:52:52,435 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-28 03:52:52,436 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-28 03:52:52,436 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-28 03:52:52,436 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-11-28 03:52:52,436 INFO L87 Difference]: Start difference. First operand 234 states and 317 transitions. Second operand has 11 states, 11 states have (on average 4.090909090909091) internal successors, (45), 11 states have internal predecessors, (45), 4 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2024-11-28 03:52:53,982 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 03:52:53,982 INFO L93 Difference]: Finished difference Result 252 states and 340 transitions. [2024-11-28 03:52:53,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-28 03:52:53,984 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.090909090909091) internal successors, (45), 11 states have internal predecessors, (45), 4 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) Word has length 62 [2024-11-28 03:52:53,984 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 03:52:53,986 INFO L225 Difference]: With dead ends: 252 [2024-11-28 03:52:53,987 INFO L226 Difference]: Without dead ends: 234 [2024-11-28 03:52:53,988 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 113 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2024-11-28 03:52:53,989 INFO L435 NwaCegarLoop]: 65 mSDtfsCounter, 29 mSDsluCounter, 285 mSDsCounter, 0 mSdLazyCounter, 92 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 350 SdHoareTripleChecker+Invalid, 98 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 92 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2024-11-28 03:52:53,989 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [30 Valid, 350 Invalid, 98 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 92 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2024-11-28 03:52:53,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 234 states. [2024-11-28 03:52:54,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 234 to 218. [2024-11-28 03:52:54,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 218 states, 160 states have (on average 1.14375) internal successors, (183), 173 states have internal predecessors, (183), 32 states have call successors, (32), 14 states have call predecessors, (32), 25 states have return successors, (66), 30 states have call predecessors, (66), 31 states have call successors, (66) [2024-11-28 03:52:54,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 218 states to 218 states and 281 transitions. [2024-11-28 03:52:54,051 INFO L78 Accepts]: Start accepts. Automaton has 218 states and 281 transitions. Word has length 62 [2024-11-28 03:52:54,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 03:52:54,052 INFO L471 AbstractCegarLoop]: Abstraction has 218 states and 281 transitions. [2024-11-28 03:52:54,052 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 4.090909090909091) internal successors, (45), 11 states have internal predecessors, (45), 4 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2024-11-28 03:52:54,052 INFO L276 IsEmpty]: Start isEmpty. Operand 218 states and 281 transitions. [2024-11-28 03:52:54,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2024-11-28 03:52:54,054 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 03:52:54,054 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:52:54,068 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dce12f9-b7f9-4583-bc8d-da617b5b33ec/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Ended with exit code 0 [2024-11-28 03:52:54,256 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dce12f9-b7f9-4583-bc8d-da617b5b33ec/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:52:54,256 INFO L396 AbstractCegarLoop]: === Iteration 34 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 03:52:54,257 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:52:54,257 INFO L85 PathProgramCache]: Analyzing trace with hash 1553464034, now seen corresponding path program 1 times [2024-11-28 03:52:54,257 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-28 03:52:54,257 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [306292294] [2024-11-28 03:52:54,258 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 03:52:54,258 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:52:54,258 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dce12f9-b7f9-4583-bc8d-da617b5b33ec/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:52:54,260 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dce12f9-b7f9-4583-bc8d-da617b5b33ec/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:52:54,264 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dce12f9-b7f9-4583-bc8d-da617b5b33ec/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2024-11-28 03:52:54,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:52:54,350 INFO L256 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 13 conjuncts are in the unsatisfiable core [2024-11-28 03:52:54,352 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:52:56,203 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2024-11-28 03:52:56,203 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 03:53:00,189 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2024-11-28 03:53:00,189 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-28 03:53:00,189 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [306292294] [2024-11-28 03:53:00,189 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [306292294] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 03:53:00,189 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-28 03:53:00,190 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 20 [2024-11-28 03:53:00,190 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1282148610] [2024-11-28 03:53:00,190 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-28 03:53:00,190 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-11-28 03:53:00,190 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-28 03:53:00,191 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-11-28 03:53:00,192 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=332, Unknown=0, NotChecked=0, Total=380 [2024-11-28 03:53:00,192 INFO L87 Difference]: Start difference. First operand 218 states and 281 transitions. Second operand has 20 states, 18 states have (on average 2.888888888888889) internal successors, (52), 18 states have internal predecessors, (52), 6 states have call successors, (9), 2 states have call predecessors, (9), 4 states have return successors, (9), 6 states have call predecessors, (9), 5 states have call successors, (9) [2024-11-28 03:53:11,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 03:53:11,624 INFO L93 Difference]: Finished difference Result 255 states and 335 transitions. [2024-11-28 03:53:11,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2024-11-28 03:53:11,625 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 18 states have (on average 2.888888888888889) internal successors, (52), 18 states have internal predecessors, (52), 6 states have call successors, (9), 2 states have call predecessors, (9), 4 states have return successors, (9), 6 states have call predecessors, (9), 5 states have call successors, (9) Word has length 62 [2024-11-28 03:53:11,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 03:53:11,628 INFO L225 Difference]: With dead ends: 255 [2024-11-28 03:53:11,628 INFO L226 Difference]: Without dead ends: 246 [2024-11-28 03:53:11,629 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 9.2s TimeCoverageRelationStatistics Valid=171, Invalid=1089, Unknown=0, NotChecked=0, Total=1260 [2024-11-28 03:53:11,630 INFO L435 NwaCegarLoop]: 74 mSDtfsCounter, 127 mSDsluCounter, 904 mSDsCounter, 0 mSdLazyCounter, 460 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 134 SdHoareTripleChecker+Valid, 978 SdHoareTripleChecker+Invalid, 493 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 460 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.0s IncrementalHoareTripleChecker+Time [2024-11-28 03:53:11,630 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [134 Valid, 978 Invalid, 493 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 460 Invalid, 0 Unknown, 0 Unchecked, 6.0s Time] [2024-11-28 03:53:11,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 246 states. [2024-11-28 03:53:11,699 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 246 to 218. [2024-11-28 03:53:11,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 218 states, 160 states have (on average 1.14375) internal successors, (183), 173 states have internal predecessors, (183), 32 states have call successors, (32), 14 states have call predecessors, (32), 25 states have return successors, (65), 30 states have call predecessors, (65), 31 states have call successors, (65) [2024-11-28 03:53:11,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 218 states to 218 states and 280 transitions. [2024-11-28 03:53:11,703 INFO L78 Accepts]: Start accepts. Automaton has 218 states and 280 transitions. Word has length 62 [2024-11-28 03:53:11,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 03:53:11,703 INFO L471 AbstractCegarLoop]: Abstraction has 218 states and 280 transitions. [2024-11-28 03:53:11,703 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 18 states have (on average 2.888888888888889) internal successors, (52), 18 states have internal predecessors, (52), 6 states have call successors, (9), 2 states have call predecessors, (9), 4 states have return successors, (9), 6 states have call predecessors, (9), 5 states have call successors, (9) [2024-11-28 03:53:11,704 INFO L276 IsEmpty]: Start isEmpty. Operand 218 states and 280 transitions. [2024-11-28 03:53:11,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2024-11-28 03:53:11,705 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 03:53:11,706 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:53:11,721 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dce12f9-b7f9-4583-bc8d-da617b5b33ec/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Ended with exit code 0 [2024-11-28 03:53:11,909 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dce12f9-b7f9-4583-bc8d-da617b5b33ec/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:53:11,909 INFO L396 AbstractCegarLoop]: === Iteration 35 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 03:53:11,910 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:53:11,910 INFO L85 PathProgramCache]: Analyzing trace with hash -12618729, now seen corresponding path program 1 times [2024-11-28 03:53:11,910 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-28 03:53:11,910 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [635038927] [2024-11-28 03:53:11,910 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 03:53:11,910 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:53:11,911 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dce12f9-b7f9-4583-bc8d-da617b5b33ec/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:53:11,913 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dce12f9-b7f9-4583-bc8d-da617b5b33ec/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:53:11,915 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dce12f9-b7f9-4583-bc8d-da617b5b33ec/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2024-11-28 03:53:11,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:53:11,995 INFO L256 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-28 03:53:11,997 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:53:13,136 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2024-11-28 03:53:13,137 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 03:53:15,004 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2024-11-28 03:53:15,005 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-28 03:53:15,005 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [635038927] [2024-11-28 03:53:15,005 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [635038927] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 03:53:15,005 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-28 03:53:15,005 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2024-11-28 03:53:15,006 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1648280723] [2024-11-28 03:53:15,006 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-28 03:53:15,006 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-28 03:53:15,006 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-28 03:53:15,007 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-28 03:53:15,008 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-11-28 03:53:15,008 INFO L87 Difference]: Start difference. First operand 218 states and 280 transitions. Second operand has 11 states, 11 states have (on average 4.454545454545454) internal successors, (49), 11 states have internal predecessors, (49), 4 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2024-11-28 03:53:17,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 03:53:17,022 INFO L93 Difference]: Finished difference Result 245 states and 323 transitions. [2024-11-28 03:53:17,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-28 03:53:17,023 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.454545454545454) internal successors, (49), 11 states have internal predecessors, (49), 4 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) Word has length 64 [2024-11-28 03:53:17,024 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 03:53:17,026 INFO L225 Difference]: With dead ends: 245 [2024-11-28 03:53:17,026 INFO L226 Difference]: Without dead ends: 231 [2024-11-28 03:53:17,026 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 117 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2024-11-28 03:53:17,027 INFO L435 NwaCegarLoop]: 62 mSDtfsCounter, 51 mSDsluCounter, 368 mSDsCounter, 0 mSdLazyCounter, 99 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 430 SdHoareTripleChecker+Invalid, 109 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 99 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2024-11-28 03:53:17,028 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [53 Valid, 430 Invalid, 109 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 99 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2024-11-28 03:53:17,029 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 231 states. [2024-11-28 03:53:17,089 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 231 to 215. [2024-11-28 03:53:17,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 215 states, 158 states have (on average 1.139240506329114) internal successors, (180), 170 states have internal predecessors, (180), 32 states have call successors, (32), 14 states have call predecessors, (32), 24 states have return successors, (62), 30 states have call predecessors, (62), 31 states have call successors, (62) [2024-11-28 03:53:17,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215 states to 215 states and 274 transitions. [2024-11-28 03:53:17,092 INFO L78 Accepts]: Start accepts. Automaton has 215 states and 274 transitions. Word has length 64 [2024-11-28 03:53:17,092 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 03:53:17,092 INFO L471 AbstractCegarLoop]: Abstraction has 215 states and 274 transitions. [2024-11-28 03:53:17,092 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 4.454545454545454) internal successors, (49), 11 states have internal predecessors, (49), 4 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2024-11-28 03:53:17,093 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states and 274 transitions. [2024-11-28 03:53:17,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2024-11-28 03:53:17,094 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 03:53:17,094 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:53:17,108 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dce12f9-b7f9-4583-bc8d-da617b5b33ec/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Ended with exit code 0 [2024-11-28 03:53:17,295 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dce12f9-b7f9-4583-bc8d-da617b5b33ec/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:53:17,295 INFO L396 AbstractCegarLoop]: === Iteration 36 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 03:53:17,296 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:53:17,296 INFO L85 PathProgramCache]: Analyzing trace with hash 1211120731, now seen corresponding path program 2 times [2024-11-28 03:53:17,296 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-28 03:53:17,296 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [597744102] [2024-11-28 03:53:17,296 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 03:53:17,297 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:53:17,297 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dce12f9-b7f9-4583-bc8d-da617b5b33ec/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:53:17,299 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dce12f9-b7f9-4583-bc8d-da617b5b33ec/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:53:17,300 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dce12f9-b7f9-4583-bc8d-da617b5b33ec/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2024-11-28 03:53:17,389 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 03:53:17,389 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:53:17,392 INFO L256 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-28 03:53:17,394 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:53:18,588 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2024-11-28 03:53:18,588 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 03:53:20,253 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2024-11-28 03:53:20,254 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-28 03:53:20,254 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [597744102] [2024-11-28 03:53:20,254 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [597744102] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 03:53:20,254 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-28 03:53:20,254 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2024-11-28 03:53:20,254 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [710630039] [2024-11-28 03:53:20,254 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-28 03:53:20,255 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-28 03:53:20,255 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-28 03:53:20,255 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-28 03:53:20,255 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-11-28 03:53:20,256 INFO L87 Difference]: Start difference. First operand 215 states and 274 transitions. Second operand has 11 states, 11 states have (on average 4.454545454545454) internal successors, (49), 11 states have internal predecessors, (49), 4 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2024-11-28 03:53:21,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 03:53:21,937 INFO L93 Difference]: Finished difference Result 242 states and 317 transitions. [2024-11-28 03:53:21,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-28 03:53:21,938 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.454545454545454) internal successors, (49), 11 states have internal predecessors, (49), 4 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) Word has length 64 [2024-11-28 03:53:21,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 03:53:21,940 INFO L225 Difference]: With dead ends: 242 [2024-11-28 03:53:21,940 INFO L226 Difference]: Without dead ends: 225 [2024-11-28 03:53:21,942 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 117 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2024-11-28 03:53:21,943 INFO L435 NwaCegarLoop]: 63 mSDtfsCounter, 30 mSDsluCounter, 435 mSDsCounter, 0 mSdLazyCounter, 95 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 498 SdHoareTripleChecker+Invalid, 101 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 95 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2024-11-28 03:53:21,944 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [32 Valid, 498 Invalid, 101 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 95 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2024-11-28 03:53:21,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 225 states. [2024-11-28 03:53:22,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 225 to 204. [2024-11-28 03:53:22,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 204 states, 151 states have (on average 1.1324503311258278) internal successors, (171), 160 states have internal predecessors, (171), 31 states have call successors, (31), 14 states have call predecessors, (31), 21 states have return successors, (56), 29 states have call predecessors, (56), 30 states have call successors, (56) [2024-11-28 03:53:22,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 204 states to 204 states and 258 transitions. [2024-11-28 03:53:22,013 INFO L78 Accepts]: Start accepts. Automaton has 204 states and 258 transitions. Word has length 64 [2024-11-28 03:53:22,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 03:53:22,013 INFO L471 AbstractCegarLoop]: Abstraction has 204 states and 258 transitions. [2024-11-28 03:53:22,013 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 4.454545454545454) internal successors, (49), 11 states have internal predecessors, (49), 4 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2024-11-28 03:53:22,013 INFO L276 IsEmpty]: Start isEmpty. Operand 204 states and 258 transitions. [2024-11-28 03:53:22,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2024-11-28 03:53:22,015 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 03:53:22,015 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:53:22,030 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dce12f9-b7f9-4583-bc8d-da617b5b33ec/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Ended with exit code 0 [2024-11-28 03:53:22,215 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dce12f9-b7f9-4583-bc8d-da617b5b33ec/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:53:22,216 INFO L396 AbstractCegarLoop]: === Iteration 37 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 03:53:22,216 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:53:22,216 INFO L85 PathProgramCache]: Analyzing trace with hash -1698788290, now seen corresponding path program 1 times [2024-11-28 03:53:22,217 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-28 03:53:22,217 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [734803016] [2024-11-28 03:53:22,217 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 03:53:22,217 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:53:22,217 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dce12f9-b7f9-4583-bc8d-da617b5b33ec/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:53:22,219 INFO L229 MonitoredProcess]: Starting monitored process 42 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dce12f9-b7f9-4583-bc8d-da617b5b33ec/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:53:22,221 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dce12f9-b7f9-4583-bc8d-da617b5b33ec/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2024-11-28 03:53:22,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:53:22,311 INFO L256 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-11-28 03:53:22,312 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:53:24,515 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 17 proven. 3 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-11-28 03:53:24,515 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 03:53:27,776 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 17 proven. 3 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-11-28 03:53:27,776 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-28 03:53:27,776 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [734803016] [2024-11-28 03:53:27,776 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [734803016] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 03:53:27,777 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-28 03:53:27,777 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 16 [2024-11-28 03:53:27,777 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [441986433] [2024-11-28 03:53:27,777 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-28 03:53:27,777 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-11-28 03:53:27,777 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-28 03:53:27,778 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-11-28 03:53:27,778 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=207, Unknown=0, NotChecked=0, Total=240 [2024-11-28 03:53:27,779 INFO L87 Difference]: Start difference. First operand 204 states and 258 transitions. Second operand has 16 states, 16 states have (on average 3.5) internal successors, (56), 14 states have internal predecessors, (56), 5 states have call successors, (9), 2 states have call predecessors, (9), 4 states have return successors, (9), 6 states have call predecessors, (9), 4 states have call successors, (9) [2024-11-28 03:53:31,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 03:53:31,632 INFO L93 Difference]: Finished difference Result 227 states and 281 transitions. [2024-11-28 03:53:31,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-11-28 03:53:31,633 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.5) internal successors, (56), 14 states have internal predecessors, (56), 5 states have call successors, (9), 2 states have call predecessors, (9), 4 states have return successors, (9), 6 states have call predecessors, (9), 4 states have call successors, (9) Word has length 71 [2024-11-28 03:53:31,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 03:53:31,636 INFO L225 Difference]: With dead ends: 227 [2024-11-28 03:53:31,636 INFO L226 Difference]: Without dead ends: 215 [2024-11-28 03:53:31,637 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 124 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=59, Invalid=361, Unknown=0, NotChecked=0, Total=420 [2024-11-28 03:53:31,638 INFO L435 NwaCegarLoop]: 64 mSDtfsCounter, 28 mSDsluCounter, 639 mSDsCounter, 0 mSdLazyCounter, 222 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 703 SdHoareTripleChecker+Invalid, 227 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 222 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2024-11-28 03:53:31,638 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 703 Invalid, 227 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 222 Invalid, 0 Unknown, 0 Unchecked, 2.8s Time] [2024-11-28 03:53:31,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 215 states. [2024-11-28 03:53:31,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 215 to 199. [2024-11-28 03:53:31,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 199 states, 148 states have (on average 1.1283783783783783) internal successors, (167), 156 states have internal predecessors, (167), 30 states have call successors, (30), 14 states have call predecessors, (30), 20 states have return successors, (49), 28 states have call predecessors, (49), 29 states have call successors, (49) [2024-11-28 03:53:31,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 246 transitions. [2024-11-28 03:53:31,699 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 246 transitions. Word has length 71 [2024-11-28 03:53:31,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 03:53:31,699 INFO L471 AbstractCegarLoop]: Abstraction has 199 states and 246 transitions. [2024-11-28 03:53:31,700 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.5) internal successors, (56), 14 states have internal predecessors, (56), 5 states have call successors, (9), 2 states have call predecessors, (9), 4 states have return successors, (9), 6 states have call predecessors, (9), 4 states have call successors, (9) [2024-11-28 03:53:31,700 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 246 transitions. [2024-11-28 03:53:31,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2024-11-28 03:53:31,702 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 03:53:31,702 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:53:31,716 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dce12f9-b7f9-4583-bc8d-da617b5b33ec/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Ended with exit code 0 [2024-11-28 03:53:31,902 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dce12f9-b7f9-4583-bc8d-da617b5b33ec/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:53:31,902 INFO L396 AbstractCegarLoop]: === Iteration 38 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 03:53:31,903 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:53:31,903 INFO L85 PathProgramCache]: Analyzing trace with hash 1310665658, now seen corresponding path program 1 times [2024-11-28 03:53:31,903 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-28 03:53:31,903 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1677825446] [2024-11-28 03:53:31,903 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 03:53:31,903 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:53:31,903 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dce12f9-b7f9-4583-bc8d-da617b5b33ec/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:53:31,906 INFO L229 MonitoredProcess]: Starting monitored process 43 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dce12f9-b7f9-4583-bc8d-da617b5b33ec/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:53:31,907 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dce12f9-b7f9-4583-bc8d-da617b5b33ec/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2024-11-28 03:53:32,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:53:32,011 INFO L256 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 36 conjuncts are in the unsatisfiable core [2024-11-28 03:53:32,013 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:53:36,258 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2024-11-28 03:53:36,258 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-28 03:53:36,258 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-28 03:53:36,258 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1677825446] [2024-11-28 03:53:36,258 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1677825446] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 03:53:36,258 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 03:53:36,258 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2024-11-28 03:53:36,258 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1430644896] [2024-11-28 03:53:36,259 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 03:53:36,259 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-11-28 03:53:36,259 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-28 03:53:36,260 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-11-28 03:53:36,260 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2024-11-28 03:53:36,260 INFO L87 Difference]: Start difference. First operand 199 states and 246 transitions. Second operand has 12 states, 11 states have (on average 3.090909090909091) internal successors, (34), 11 states have internal predecessors, (34), 4 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2024-11-28 03:53:38,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 03:53:38,939 INFO L93 Difference]: Finished difference Result 215 states and 262 transitions. [2024-11-28 03:53:38,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-11-28 03:53:38,940 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 3.090909090909091) internal successors, (34), 11 states have internal predecessors, (34), 4 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) Word has length 71 [2024-11-28 03:53:38,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 03:53:38,942 INFO L225 Difference]: With dead ends: 215 [2024-11-28 03:53:38,942 INFO L226 Difference]: Without dead ends: 206 [2024-11-28 03:53:38,943 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 59 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2024-11-28 03:53:38,943 INFO L435 NwaCegarLoop]: 72 mSDtfsCounter, 6 mSDsluCounter, 638 mSDsCounter, 0 mSdLazyCounter, 204 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 710 SdHoareTripleChecker+Invalid, 204 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 204 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2024-11-28 03:53:38,943 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 710 Invalid, 204 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 204 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2024-11-28 03:53:38,944 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2024-11-28 03:53:38,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 199. [2024-11-28 03:53:38,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 199 states, 148 states have (on average 1.1283783783783783) internal successors, (167), 156 states have internal predecessors, (167), 30 states have call successors, (30), 14 states have call predecessors, (30), 20 states have return successors, (48), 28 states have call predecessors, (48), 29 states have call successors, (48) [2024-11-28 03:53:38,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 245 transitions. [2024-11-28 03:53:38,994 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 245 transitions. Word has length 71 [2024-11-28 03:53:38,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 03:53:38,994 INFO L471 AbstractCegarLoop]: Abstraction has 199 states and 245 transitions. [2024-11-28 03:53:38,994 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 3.090909090909091) internal successors, (34), 11 states have internal predecessors, (34), 4 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2024-11-28 03:53:38,995 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 245 transitions. [2024-11-28 03:53:38,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2024-11-28 03:53:38,996 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 03:53:38,996 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:53:39,008 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dce12f9-b7f9-4583-bc8d-da617b5b33ec/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Ended with exit code 0 [2024-11-28 03:53:39,197 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 43 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dce12f9-b7f9-4583-bc8d-da617b5b33ec/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:53:39,197 INFO L396 AbstractCegarLoop]: === Iteration 39 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 03:53:39,197 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:53:39,197 INFO L85 PathProgramCache]: Analyzing trace with hash 1385395055, now seen corresponding path program 1 times [2024-11-28 03:53:39,198 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-28 03:53:39,198 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2136545885] [2024-11-28 03:53:39,198 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 03:53:39,198 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:53:39,198 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dce12f9-b7f9-4583-bc8d-da617b5b33ec/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:53:39,200 INFO L229 MonitoredProcess]: Starting monitored process 44 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dce12f9-b7f9-4583-bc8d-da617b5b33ec/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:53:39,202 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dce12f9-b7f9-4583-bc8d-da617b5b33ec/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2024-11-28 03:53:39,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:53:39,287 INFO L256 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 18 conjuncts are in the unsatisfiable core [2024-11-28 03:53:39,289 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:53:46,362 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 4 proven. 10 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2024-11-28 03:53:46,362 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 03:53:57,112 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 4 proven. 10 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2024-11-28 03:53:57,112 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-28 03:53:57,112 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2136545885] [2024-11-28 03:53:57,113 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2136545885] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 03:53:57,113 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-28 03:53:57,113 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2024-11-28 03:53:57,113 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [69879870] [2024-11-28 03:53:57,113 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-28 03:53:57,114 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2024-11-28 03:53:57,114 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-28 03:53:57,114 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2024-11-28 03:53:57,115 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=518, Unknown=0, NotChecked=0, Total=600 [2024-11-28 03:53:57,115 INFO L87 Difference]: Start difference. First operand 199 states and 245 transitions. Second operand has 25 states, 25 states have (on average 2.48) internal successors, (62), 25 states have internal predecessors, (62), 8 states have call successors, (11), 2 states have call predecessors, (11), 4 states have return successors, (11), 8 states have call predecessors, (11), 7 states have call successors, (11) [2024-11-28 03:54:24,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 03:54:24,540 INFO L93 Difference]: Finished difference Result 238 states and 298 transitions. [2024-11-28 03:54:24,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-11-28 03:54:24,542 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.48) internal successors, (62), 25 states have internal predecessors, (62), 8 states have call successors, (11), 2 states have call predecessors, (11), 4 states have return successors, (11), 8 states have call predecessors, (11), 7 states have call successors, (11) Word has length 71 [2024-11-28 03:54:24,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 03:54:24,543 INFO L225 Difference]: With dead ends: 238 [2024-11-28 03:54:24,543 INFO L226 Difference]: Without dead ends: 229 [2024-11-28 03:54:24,545 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 117 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 142 ImplicationChecksByTransitivity, 28.3s TimeCoverageRelationStatistics Valid=187, Invalid=1073, Unknown=0, NotChecked=0, Total=1260 [2024-11-28 03:54:24,546 INFO L435 NwaCegarLoop]: 79 mSDtfsCounter, 67 mSDsluCounter, 1093 mSDsCounter, 0 mSdLazyCounter, 451 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 13.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 1172 SdHoareTripleChecker+Invalid, 465 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 451 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 13.4s IncrementalHoareTripleChecker+Time [2024-11-28 03:54:24,546 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [70 Valid, 1172 Invalid, 465 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 451 Invalid, 0 Unknown, 0 Unchecked, 13.4s Time] [2024-11-28 03:54:24,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 229 states. [2024-11-28 03:54:24,616 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 229 to 204. [2024-11-28 03:54:24,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 204 states, 152 states have (on average 1.138157894736842) internal successors, (173), 161 states have internal predecessors, (173), 30 states have call successors, (30), 14 states have call predecessors, (30), 21 states have return successors, (52), 28 states have call predecessors, (52), 29 states have call successors, (52) [2024-11-28 03:54:24,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 204 states to 204 states and 255 transitions. [2024-11-28 03:54:24,619 INFO L78 Accepts]: Start accepts. Automaton has 204 states and 255 transitions. Word has length 71 [2024-11-28 03:54:24,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 03:54:24,619 INFO L471 AbstractCegarLoop]: Abstraction has 204 states and 255 transitions. [2024-11-28 03:54:24,620 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.48) internal successors, (62), 25 states have internal predecessors, (62), 8 states have call successors, (11), 2 states have call predecessors, (11), 4 states have return successors, (11), 8 states have call predecessors, (11), 7 states have call successors, (11) [2024-11-28 03:54:24,620 INFO L276 IsEmpty]: Start isEmpty. Operand 204 states and 255 transitions. [2024-11-28 03:54:24,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2024-11-28 03:54:24,622 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 03:54:24,622 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:54:24,638 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dce12f9-b7f9-4583-bc8d-da617b5b33ec/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Forceful destruction successful, exit code 0 [2024-11-28 03:54:24,822 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dce12f9-b7f9-4583-bc8d-da617b5b33ec/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:54:24,823 INFO L396 AbstractCegarLoop]: === Iteration 40 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 03:54:24,823 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:54:24,824 INFO L85 PathProgramCache]: Analyzing trace with hash 1604249773, now seen corresponding path program 1 times [2024-11-28 03:54:24,824 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-28 03:54:24,824 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1158361642] [2024-11-28 03:54:24,824 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 03:54:24,824 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:54:24,824 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dce12f9-b7f9-4583-bc8d-da617b5b33ec/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:54:24,827 INFO L229 MonitoredProcess]: Starting monitored process 45 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dce12f9-b7f9-4583-bc8d-da617b5b33ec/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:54:24,829 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dce12f9-b7f9-4583-bc8d-da617b5b33ec/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2024-11-28 03:54:24,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:54:24,950 INFO L256 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 25 conjuncts are in the unsatisfiable core [2024-11-28 03:54:24,953 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:54:30,519 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-11-28 03:54:30,520 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 03:54:43,078 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 4 proven. 10 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2024-11-28 03:54:43,078 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-28 03:54:43,078 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1158361642] [2024-11-28 03:54:43,078 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1158361642] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 03:54:43,078 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-28 03:54:43,079 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16] total 28 [2024-11-28 03:54:43,079 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [948707812] [2024-11-28 03:54:43,079 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-28 03:54:43,079 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2024-11-28 03:54:43,079 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-28 03:54:43,080 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2024-11-28 03:54:43,081 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=649, Unknown=0, NotChecked=0, Total=756 [2024-11-28 03:54:43,081 INFO L87 Difference]: Start difference. First operand 204 states and 255 transitions. Second operand has 28 states, 28 states have (on average 2.1785714285714284) internal successors, (61), 28 states have internal predecessors, (61), 8 states have call successors, (11), 2 states have call predecessors, (11), 4 states have return successors, (11), 8 states have call predecessors, (11), 7 states have call successors, (11) [2024-11-28 03:55:04,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 03:55:04,741 INFO L93 Difference]: Finished difference Result 303 states and 388 transitions. [2024-11-28 03:55:04,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2024-11-28 03:55:04,743 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.1785714285714284) internal successors, (61), 28 states have internal predecessors, (61), 8 states have call successors, (11), 2 states have call predecessors, (11), 4 states have return successors, (11), 8 states have call predecessors, (11), 7 states have call successors, (11) Word has length 71 [2024-11-28 03:55:04,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 03:55:04,745 INFO L225 Difference]: With dead ends: 303 [2024-11-28 03:55:04,745 INFO L226 Difference]: Without dead ends: 283 [2024-11-28 03:55:04,746 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 114 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 330 ImplicationChecksByTransitivity, 23.4s TimeCoverageRelationStatistics Valid=342, Invalid=2108, Unknown=0, NotChecked=0, Total=2450 [2024-11-28 03:55:04,747 INFO L435 NwaCegarLoop]: 72 mSDtfsCounter, 75 mSDsluCounter, 769 mSDsCounter, 0 mSdLazyCounter, 666 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 80 SdHoareTripleChecker+Valid, 841 SdHoareTripleChecker+Invalid, 689 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 666 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10.0s IncrementalHoareTripleChecker+Time [2024-11-28 03:55:04,747 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [80 Valid, 841 Invalid, 689 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 666 Invalid, 0 Unknown, 0 Unchecked, 10.0s Time] [2024-11-28 03:55:04,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 283 states. [2024-11-28 03:55:04,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 283 to 248. [2024-11-28 03:55:04,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 248 states, 185 states have (on average 1.145945945945946) internal successors, (212), 196 states have internal predecessors, (212), 38 states have call successors, (38), 16 states have call predecessors, (38), 24 states have return successors, (70), 35 states have call predecessors, (70), 37 states have call successors, (70) [2024-11-28 03:55:04,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 248 states to 248 states and 320 transitions. [2024-11-28 03:55:04,847 INFO L78 Accepts]: Start accepts. Automaton has 248 states and 320 transitions. Word has length 71 [2024-11-28 03:55:04,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 03:55:04,848 INFO L471 AbstractCegarLoop]: Abstraction has 248 states and 320 transitions. [2024-11-28 03:55:04,848 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.1785714285714284) internal successors, (61), 28 states have internal predecessors, (61), 8 states have call successors, (11), 2 states have call predecessors, (11), 4 states have return successors, (11), 8 states have call predecessors, (11), 7 states have call successors, (11) [2024-11-28 03:55:04,848 INFO L276 IsEmpty]: Start isEmpty. Operand 248 states and 320 transitions. [2024-11-28 03:55:04,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2024-11-28 03:55:04,849 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 03:55:04,850 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:55:04,864 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dce12f9-b7f9-4583-bc8d-da617b5b33ec/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Ended with exit code 0 [2024-11-28 03:55:05,050 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dce12f9-b7f9-4583-bc8d-da617b5b33ec/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:55:05,051 INFO L396 AbstractCegarLoop]: === Iteration 41 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 03:55:05,051 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:55:05,051 INFO L85 PathProgramCache]: Analyzing trace with hash -459972111, now seen corresponding path program 2 times [2024-11-28 03:55:05,052 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-28 03:55:05,052 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1406351225] [2024-11-28 03:55:05,052 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 03:55:05,052 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:55:05,052 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dce12f9-b7f9-4583-bc8d-da617b5b33ec/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:55:05,054 INFO L229 MonitoredProcess]: Starting monitored process 46 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dce12f9-b7f9-4583-bc8d-da617b5b33ec/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:55:05,056 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dce12f9-b7f9-4583-bc8d-da617b5b33ec/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2024-11-28 03:55:05,167 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 03:55:05,167 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:55:05,170 INFO L256 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 33 conjuncts are in the unsatisfiable core [2024-11-28 03:55:05,175 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:55:12,188 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-11-28 03:55:12,188 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 03:55:32,213 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 4 proven. 10 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2024-11-28 03:55:32,213 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-28 03:55:32,213 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1406351225] [2024-11-28 03:55:32,213 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1406351225] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 03:55:32,213 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-28 03:55:32,213 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 20] total 35 [2024-11-28 03:55:32,214 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1898464627] [2024-11-28 03:55:32,214 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-28 03:55:32,214 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2024-11-28 03:55:32,214 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-28 03:55:32,216 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2024-11-28 03:55:32,217 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=1059, Unknown=0, NotChecked=0, Total=1190 [2024-11-28 03:55:32,218 INFO L87 Difference]: Start difference. First operand 248 states and 320 transitions. Second operand has 35 states, 33 states have (on average 1.9090909090909092) internal successors, (63), 33 states have internal predecessors, (63), 8 states have call successors, (11), 2 states have call predecessors, (11), 4 states have return successors, (11), 9 states have call predecessors, (11), 7 states have call successors, (11) [2024-11-28 03:56:26,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 03:56:26,478 INFO L93 Difference]: Finished difference Result 353 states and 459 transitions. [2024-11-28 03:56:26,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2024-11-28 03:56:26,481 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 33 states have (on average 1.9090909090909092) internal successors, (63), 33 states have internal predecessors, (63), 8 states have call successors, (11), 2 states have call predecessors, (11), 4 states have return successors, (11), 9 states have call predecessors, (11), 7 states have call successors, (11) Word has length 71 [2024-11-28 03:56:26,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 03:56:26,483 INFO L225 Difference]: With dead ends: 353 [2024-11-28 03:56:26,483 INFO L226 Difference]: Without dead ends: 338 [2024-11-28 03:56:26,485 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 107 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 743 ImplicationChecksByTransitivity, 47.2s TimeCoverageRelationStatistics Valid=480, Invalid=4350, Unknown=0, NotChecked=0, Total=4830 [2024-11-28 03:56:26,486 INFO L435 NwaCegarLoop]: 69 mSDtfsCounter, 57 mSDsluCounter, 1470 mSDsCounter, 0 mSdLazyCounter, 1765 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 25.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 1539 SdHoareTripleChecker+Invalid, 1816 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 1765 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 26.4s IncrementalHoareTripleChecker+Time [2024-11-28 03:56:26,486 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [61 Valid, 1539 Invalid, 1816 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 1765 Invalid, 0 Unknown, 0 Unchecked, 26.4s Time] [2024-11-28 03:56:26,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 338 states. [2024-11-28 03:56:26,580 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 338 to 262. [2024-11-28 03:56:26,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 262 states, 197 states have (on average 1.1573604060913705) internal successors, (228), 208 states have internal predecessors, (228), 40 states have call successors, (40), 17 states have call predecessors, (40), 24 states have return successors, (70), 36 states have call predecessors, (70), 39 states have call successors, (70) [2024-11-28 03:56:26,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 262 states to 262 states and 338 transitions. [2024-11-28 03:56:26,583 INFO L78 Accepts]: Start accepts. Automaton has 262 states and 338 transitions. Word has length 71 [2024-11-28 03:56:26,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 03:56:26,584 INFO L471 AbstractCegarLoop]: Abstraction has 262 states and 338 transitions. [2024-11-28 03:56:26,584 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 33 states have (on average 1.9090909090909092) internal successors, (63), 33 states have internal predecessors, (63), 8 states have call successors, (11), 2 states have call predecessors, (11), 4 states have return successors, (11), 9 states have call predecessors, (11), 7 states have call successors, (11) [2024-11-28 03:56:26,584 INFO L276 IsEmpty]: Start isEmpty. Operand 262 states and 338 transitions. [2024-11-28 03:56:26,586 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2024-11-28 03:56:26,586 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 03:56:26,586 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:56:26,599 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dce12f9-b7f9-4583-bc8d-da617b5b33ec/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Ended with exit code 0 [2024-11-28 03:56:26,787 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dce12f9-b7f9-4583-bc8d-da617b5b33ec/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:56:26,787 INFO L396 AbstractCegarLoop]: === Iteration 42 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 03:56:26,787 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:56:26,787 INFO L85 PathProgramCache]: Analyzing trace with hash 1455295583, now seen corresponding path program 1 times [2024-11-28 03:56:26,788 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-28 03:56:26,788 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2001563830] [2024-11-28 03:56:26,788 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 03:56:26,788 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:56:26,788 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dce12f9-b7f9-4583-bc8d-da617b5b33ec/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:56:26,790 INFO L229 MonitoredProcess]: Starting monitored process 47 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dce12f9-b7f9-4583-bc8d-da617b5b33ec/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:56:26,792 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dce12f9-b7f9-4583-bc8d-da617b5b33ec/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2024-11-28 03:56:26,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:56:26,885 INFO L256 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 18 conjuncts are in the unsatisfiable core [2024-11-28 03:56:26,888 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:56:32,445 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 4 proven. 10 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2024-11-28 03:56:32,445 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 03:56:35,828 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-28 03:56:35,829 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2001563830] [2024-11-28 03:56:35,829 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2001563830] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 03:56:35,829 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [952556599] [2024-11-28 03:56:35,829 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 03:56:35,829 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-11-28 03:56:35,829 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dce12f9-b7f9-4583-bc8d-da617b5b33ec/bin/uautomizer-verify-aQ6SnzHsRB/cvc4 [2024-11-28 03:56:35,832 INFO L229 MonitoredProcess]: Starting monitored process 48 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dce12f9-b7f9-4583-bc8d-da617b5b33ec/bin/uautomizer-verify-aQ6SnzHsRB/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2024-11-28 03:56:35,833 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dce12f9-b7f9-4583-bc8d-da617b5b33ec/bin/uautomizer-verify-aQ6SnzHsRB/cvc4 --incremental --print-success --lang smt (48)] Waiting until timeout for monitored process [2024-11-28 03:56:35,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:56:35,968 INFO L256 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-11-28 03:56:35,969 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:56:38,747 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2024-11-28 03:56:38,747 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-28 03:56:38,747 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [952556599] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 03:56:38,747 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-28 03:56:38,747 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [14] total 17 [2024-11-28 03:56:38,747 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [77528860] [2024-11-28 03:56:38,747 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 03:56:38,748 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-28 03:56:38,748 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-28 03:56:38,749 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-28 03:56:38,749 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=269, Unknown=0, NotChecked=0, Total=306 [2024-11-28 03:56:38,749 INFO L87 Difference]: Start difference. First operand 262 states and 338 transitions. Second operand has 5 states, 5 states have (on average 7.4) internal successors, (37), 5 states have internal predecessors, (37), 4 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2024-11-28 03:56:39,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 03:56:39,224 INFO L93 Difference]: Finished difference Result 307 states and 410 transitions. [2024-11-28 03:56:39,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-28 03:56:39,225 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 7.4) internal successors, (37), 5 states have internal predecessors, (37), 4 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) Word has length 73 [2024-11-28 03:56:39,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 03:56:39,227 INFO L225 Difference]: With dead ends: 307 [2024-11-28 03:56:39,228 INFO L226 Difference]: Without dead ends: 282 [2024-11-28 03:56:39,228 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 137 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 9.2s TimeCoverageRelationStatistics Valid=37, Invalid=269, Unknown=0, NotChecked=0, Total=306 [2024-11-28 03:56:39,229 INFO L435 NwaCegarLoop]: 80 mSDtfsCounter, 9 mSDsluCounter, 211 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 291 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-28 03:56:39,229 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 291 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-11-28 03:56:39,230 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 282 states. [2024-11-28 03:56:39,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 282 to 257. [2024-11-28 03:56:39,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 257 states, 192 states have (on average 1.1458333333333333) internal successors, (220), 202 states have internal predecessors, (220), 40 states have call successors, (40), 17 states have call predecessors, (40), 24 states have return successors, (82), 37 states have call predecessors, (82), 39 states have call successors, (82) [2024-11-28 03:56:39,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 257 states to 257 states and 342 transitions. [2024-11-28 03:56:39,344 INFO L78 Accepts]: Start accepts. Automaton has 257 states and 342 transitions. Word has length 73 [2024-11-28 03:56:39,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 03:56:39,345 INFO L471 AbstractCegarLoop]: Abstraction has 257 states and 342 transitions. [2024-11-28 03:56:39,345 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.4) internal successors, (37), 5 states have internal predecessors, (37), 4 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2024-11-28 03:56:39,345 INFO L276 IsEmpty]: Start isEmpty. Operand 257 states and 342 transitions. [2024-11-28 03:56:39,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2024-11-28 03:56:39,347 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 03:56:39,347 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:56:39,352 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dce12f9-b7f9-4583-bc8d-da617b5b33ec/bin/uautomizer-verify-aQ6SnzHsRB/cvc4 --incremental --print-success --lang smt (48)] Ended with exit code 0 [2024-11-28 03:56:39,562 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dce12f9-b7f9-4583-bc8d-da617b5b33ec/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Ended with exit code 0 [2024-11-28 03:56:39,748 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 48 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dce12f9-b7f9-4583-bc8d-da617b5b33ec/bin/uautomizer-verify-aQ6SnzHsRB/cvc4 --incremental --print-success --lang smt,47 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dce12f9-b7f9-4583-bc8d-da617b5b33ec/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:56:39,748 INFO L396 AbstractCegarLoop]: === Iteration 43 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 03:56:39,748 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:56:39,749 INFO L85 PathProgramCache]: Analyzing trace with hash 1674150301, now seen corresponding path program 1 times [2024-11-28 03:56:39,749 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-28 03:56:39,749 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1115035893] [2024-11-28 03:56:39,749 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 03:56:39,749 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:56:39,749 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dce12f9-b7f9-4583-bc8d-da617b5b33ec/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:56:39,752 INFO L229 MonitoredProcess]: Starting monitored process 49 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dce12f9-b7f9-4583-bc8d-da617b5b33ec/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:56:39,754 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dce12f9-b7f9-4583-bc8d-da617b5b33ec/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2024-11-28 03:56:39,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:56:39,852 INFO L256 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 25 conjuncts are in the unsatisfiable core [2024-11-28 03:56:39,855 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:56:44,868 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-11-28 03:56:44,868 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 03:56:55,824 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 7 proven. 7 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2024-11-28 03:56:55,824 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-28 03:56:55,824 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1115035893] [2024-11-28 03:56:55,824 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1115035893] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 03:56:55,824 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-28 03:56:55,824 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16] total 28 [2024-11-28 03:56:55,825 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [428657039] [2024-11-28 03:56:55,825 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-28 03:56:55,825 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2024-11-28 03:56:55,825 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-28 03:56:55,826 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2024-11-28 03:56:55,826 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=623, Unknown=0, NotChecked=0, Total=756 [2024-11-28 03:56:55,826 INFO L87 Difference]: Start difference. First operand 257 states and 342 transitions. Second operand has 28 states, 28 states have (on average 2.25) internal successors, (63), 28 states have internal predecessors, (63), 8 states have call successors, (11), 2 states have call predecessors, (11), 4 states have return successors, (11), 8 states have call predecessors, (11), 7 states have call successors, (11) [2024-11-28 03:57:07,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 03:57:07,895 INFO L93 Difference]: Finished difference Result 317 states and 412 transitions. [2024-11-28 03:57:07,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2024-11-28 03:57:07,896 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.25) internal successors, (63), 28 states have internal predecessors, (63), 8 states have call successors, (11), 2 states have call predecessors, (11), 4 states have return successors, (11), 8 states have call predecessors, (11), 7 states have call successors, (11) Word has length 73 [2024-11-28 03:57:07,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 03:57:07,898 INFO L225 Difference]: With dead ends: 317 [2024-11-28 03:57:07,898 INFO L226 Difference]: Without dead ends: 294 [2024-11-28 03:57:07,899 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 118 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 13.5s TimeCoverageRelationStatistics Valid=231, Invalid=1029, Unknown=0, NotChecked=0, Total=1260 [2024-11-28 03:57:07,900 INFO L435 NwaCegarLoop]: 77 mSDtfsCounter, 52 mSDsluCounter, 1106 mSDsCounter, 0 mSdLazyCounter, 661 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 1183 SdHoareTripleChecker+Invalid, 690 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 661 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.9s IncrementalHoareTripleChecker+Time [2024-11-28 03:57:07,900 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [57 Valid, 1183 Invalid, 690 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 661 Invalid, 0 Unknown, 0 Unchecked, 8.9s Time] [2024-11-28 03:57:07,900 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 294 states. [2024-11-28 03:57:08,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 294 to 259. [2024-11-28 03:57:08,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 259 states, 194 states have (on average 1.134020618556701) internal successors, (220), 203 states have internal predecessors, (220), 40 states have call successors, (40), 18 states have call predecessors, (40), 24 states have return successors, (77), 37 states have call predecessors, (77), 39 states have call successors, (77) [2024-11-28 03:57:08,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 259 states to 259 states and 337 transitions. [2024-11-28 03:57:08,009 INFO L78 Accepts]: Start accepts. Automaton has 259 states and 337 transitions. Word has length 73 [2024-11-28 03:57:08,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 03:57:08,009 INFO L471 AbstractCegarLoop]: Abstraction has 259 states and 337 transitions. [2024-11-28 03:57:08,009 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.25) internal successors, (63), 28 states have internal predecessors, (63), 8 states have call successors, (11), 2 states have call predecessors, (11), 4 states have return successors, (11), 8 states have call predecessors, (11), 7 states have call successors, (11) [2024-11-28 03:57:08,009 INFO L276 IsEmpty]: Start isEmpty. Operand 259 states and 337 transitions. [2024-11-28 03:57:08,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2024-11-28 03:57:08,011 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 03:57:08,011 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:57:08,020 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dce12f9-b7f9-4583-bc8d-da617b5b33ec/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Ended with exit code 0 [2024-11-28 03:57:08,211 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dce12f9-b7f9-4583-bc8d-da617b5b33ec/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:57:08,212 INFO L396 AbstractCegarLoop]: === Iteration 44 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 03:57:08,212 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:57:08,212 INFO L85 PathProgramCache]: Analyzing trace with hash 1748879698, now seen corresponding path program 1 times [2024-11-28 03:57:08,212 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-28 03:57:08,212 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1717154232] [2024-11-28 03:57:08,212 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 03:57:08,213 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:57:08,213 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dce12f9-b7f9-4583-bc8d-da617b5b33ec/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:57:08,215 INFO L229 MonitoredProcess]: Starting monitored process 50 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dce12f9-b7f9-4583-bc8d-da617b5b33ec/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:57:08,216 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dce12f9-b7f9-4583-bc8d-da617b5b33ec/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2024-11-28 03:57:08,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:57:08,308 INFO L256 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-11-28 03:57:08,310 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:57:08,816 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2024-11-28 03:57:08,816 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 03:57:09,468 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2024-11-28 03:57:09,468 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-28 03:57:09,468 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1717154232] [2024-11-28 03:57:09,468 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1717154232] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 03:57:09,469 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-28 03:57:09,469 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2024-11-28 03:57:09,469 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1718782672] [2024-11-28 03:57:09,469 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-28 03:57:09,469 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-28 03:57:09,469 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-28 03:57:09,470 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-28 03:57:09,470 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-28 03:57:09,470 INFO L87 Difference]: Start difference. First operand 259 states and 337 transitions. Second operand has 6 states, 6 states have (on average 6.333333333333333) internal successors, (38), 5 states have internal predecessors, (38), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) [2024-11-28 03:57:09,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 03:57:09,908 INFO L93 Difference]: Finished difference Result 269 states and 347 transitions. [2024-11-28 03:57:09,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-28 03:57:09,909 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 6.333333333333333) internal successors, (38), 5 states have internal predecessors, (38), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) Word has length 73 [2024-11-28 03:57:09,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 03:57:09,911 INFO L225 Difference]: With dead ends: 269 [2024-11-28 03:57:09,911 INFO L226 Difference]: Without dead ends: 264 [2024-11-28 03:57:09,912 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 140 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-28 03:57:09,912 INFO L435 NwaCegarLoop]: 69 mSDtfsCounter, 1 mSDsluCounter, 260 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 329 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-28 03:57:09,912 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 329 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-11-28 03:57:09,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 264 states. [2024-11-28 03:57:10,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 264 to 259. [2024-11-28 03:57:10,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 259 states, 194 states have (on average 1.134020618556701) internal successors, (220), 203 states have internal predecessors, (220), 40 states have call successors, (40), 18 states have call predecessors, (40), 24 states have return successors, (77), 37 states have call predecessors, (77), 39 states have call successors, (77) [2024-11-28 03:57:10,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 259 states to 259 states and 337 transitions. [2024-11-28 03:57:10,025 INFO L78 Accepts]: Start accepts. Automaton has 259 states and 337 transitions. Word has length 73 [2024-11-28 03:57:10,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 03:57:10,025 INFO L471 AbstractCegarLoop]: Abstraction has 259 states and 337 transitions. [2024-11-28 03:57:10,026 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 6.333333333333333) internal successors, (38), 5 states have internal predecessors, (38), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) [2024-11-28 03:57:10,026 INFO L276 IsEmpty]: Start isEmpty. Operand 259 states and 337 transitions. [2024-11-28 03:57:10,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2024-11-28 03:57:10,027 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 03:57:10,027 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:57:10,038 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dce12f9-b7f9-4583-bc8d-da617b5b33ec/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Forceful destruction successful, exit code 0 [2024-11-28 03:57:10,228 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dce12f9-b7f9-4583-bc8d-da617b5b33ec/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:57:10,228 INFO L396 AbstractCegarLoop]: === Iteration 45 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 03:57:10,228 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:57:10,228 INFO L85 PathProgramCache]: Analyzing trace with hash 1878942305, now seen corresponding path program 2 times [2024-11-28 03:57:10,229 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-28 03:57:10,229 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1917975479] [2024-11-28 03:57:10,229 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 03:57:10,229 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:57:10,229 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dce12f9-b7f9-4583-bc8d-da617b5b33ec/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:57:10,231 INFO L229 MonitoredProcess]: Starting monitored process 51 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dce12f9-b7f9-4583-bc8d-da617b5b33ec/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:57:10,232 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dce12f9-b7f9-4583-bc8d-da617b5b33ec/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Waiting until timeout for monitored process [2024-11-28 03:57:10,324 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 03:57:10,324 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:57:10,326 INFO L256 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 25 conjuncts are in the unsatisfiable core [2024-11-28 03:57:10,328 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:57:15,009 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-11-28 03:57:15,010 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 03:57:25,920 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 7 proven. 7 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2024-11-28 03:57:25,920 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-28 03:57:25,920 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1917975479] [2024-11-28 03:57:25,920 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1917975479] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 03:57:25,920 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-28 03:57:25,921 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16] total 28 [2024-11-28 03:57:25,921 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [842432099] [2024-11-28 03:57:25,921 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-28 03:57:25,921 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2024-11-28 03:57:25,921 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-28 03:57:25,922 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2024-11-28 03:57:25,922 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=629, Unknown=0, NotChecked=0, Total=756 [2024-11-28 03:57:25,922 INFO L87 Difference]: Start difference. First operand 259 states and 337 transitions. Second operand has 28 states, 28 states have (on average 2.25) internal successors, (63), 28 states have internal predecessors, (63), 8 states have call successors, (11), 2 states have call predecessors, (11), 4 states have return successors, (11), 8 states have call predecessors, (11), 7 states have call successors, (11) [2024-11-28 03:57:36,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 03:57:36,610 INFO L93 Difference]: Finished difference Result 321 states and 408 transitions. [2024-11-28 03:57:36,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2024-11-28 03:57:36,612 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.25) internal successors, (63), 28 states have internal predecessors, (63), 8 states have call successors, (11), 2 states have call predecessors, (11), 4 states have return successors, (11), 8 states have call predecessors, (11), 7 states have call successors, (11) Word has length 73 [2024-11-28 03:57:36,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 03:57:36,613 INFO L225 Difference]: With dead ends: 321 [2024-11-28 03:57:36,613 INFO L226 Difference]: Without dead ends: 307 [2024-11-28 03:57:36,614 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 118 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 119 ImplicationChecksByTransitivity, 13.7s TimeCoverageRelationStatistics Valid=219, Invalid=1041, Unknown=0, NotChecked=0, Total=1260 [2024-11-28 03:57:36,614 INFO L435 NwaCegarLoop]: 71 mSDtfsCounter, 28 mSDsluCounter, 952 mSDsCounter, 0 mSdLazyCounter, 538 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 1023 SdHoareTripleChecker+Invalid, 547 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 538 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.2s IncrementalHoareTripleChecker+Time [2024-11-28 03:57:36,614 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [33 Valid, 1023 Invalid, 547 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 538 Invalid, 0 Unknown, 0 Unchecked, 7.2s Time] [2024-11-28 03:57:36,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 307 states. [2024-11-28 03:57:36,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 307 to 267. [2024-11-28 03:57:36,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 267 states, 201 states have (on average 1.1343283582089552) internal successors, (228), 209 states have internal predecessors, (228), 41 states have call successors, (41), 19 states have call predecessors, (41), 24 states have return successors, (75), 38 states have call predecessors, (75), 40 states have call successors, (75) [2024-11-28 03:57:36,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 267 states to 267 states and 344 transitions. [2024-11-28 03:57:36,690 INFO L78 Accepts]: Start accepts. Automaton has 267 states and 344 transitions. Word has length 73 [2024-11-28 03:57:36,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 03:57:36,690 INFO L471 AbstractCegarLoop]: Abstraction has 267 states and 344 transitions. [2024-11-28 03:57:36,690 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.25) internal successors, (63), 28 states have internal predecessors, (63), 8 states have call successors, (11), 2 states have call predecessors, (11), 4 states have return successors, (11), 8 states have call predecessors, (11), 7 states have call successors, (11) [2024-11-28 03:57:36,690 INFO L276 IsEmpty]: Start isEmpty. Operand 267 states and 344 transitions. [2024-11-28 03:57:36,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2024-11-28 03:57:36,692 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 03:57:36,692 INFO L218 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:57:36,700 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dce12f9-b7f9-4583-bc8d-da617b5b33ec/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Ended with exit code 0 [2024-11-28 03:57:36,892 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dce12f9-b7f9-4583-bc8d-da617b5b33ec/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:57:36,893 INFO L396 AbstractCegarLoop]: === Iteration 46 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 03:57:36,893 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:57:36,893 INFO L85 PathProgramCache]: Analyzing trace with hash 127130955, now seen corresponding path program 1 times [2024-11-28 03:57:36,893 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-28 03:57:36,894 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1117387878] [2024-11-28 03:57:36,894 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 03:57:36,894 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:57:36,894 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dce12f9-b7f9-4583-bc8d-da617b5b33ec/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:57:36,896 INFO L229 MonitoredProcess]: Starting monitored process 52 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dce12f9-b7f9-4583-bc8d-da617b5b33ec/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:57:36,898 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dce12f9-b7f9-4583-bc8d-da617b5b33ec/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Waiting until timeout for monitored process [2024-11-28 03:57:37,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:57:37,005 INFO L256 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 24 conjuncts are in the unsatisfiable core [2024-11-28 03:57:37,010 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:57:40,888 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 6 proven. 9 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2024-11-28 03:57:40,888 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 03:57:49,370 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2024-11-28 03:57:49,370 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-28 03:57:49,370 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1117387878] [2024-11-28 03:57:49,370 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1117387878] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 03:57:49,370 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-28 03:57:49,370 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15] total 26 [2024-11-28 03:57:49,371 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [296756278] [2024-11-28 03:57:49,371 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-28 03:57:49,371 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2024-11-28 03:57:49,371 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-28 03:57:49,372 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2024-11-28 03:57:49,372 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=557, Unknown=0, NotChecked=0, Total=650 [2024-11-28 03:57:49,373 INFO L87 Difference]: Start difference. First operand 267 states and 344 transitions. Second operand has 26 states, 26 states have (on average 2.269230769230769) internal successors, (59), 26 states have internal predecessors, (59), 9 states have call successors, (12), 2 states have call predecessors, (12), 4 states have return successors, (12), 9 states have call predecessors, (12), 8 states have call successors, (12) [2024-11-28 03:58:00,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 03:58:00,857 INFO L93 Difference]: Finished difference Result 342 states and 425 transitions. [2024-11-28 03:58:00,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2024-11-28 03:58:00,858 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.269230769230769) internal successors, (59), 26 states have internal predecessors, (59), 9 states have call successors, (12), 2 states have call predecessors, (12), 4 states have return successors, (12), 9 states have call predecessors, (12), 8 states have call successors, (12) Word has length 76 [2024-11-28 03:58:00,859 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 03:58:00,860 INFO L225 Difference]: With dead ends: 342 [2024-11-28 03:58:00,860 INFO L226 Difference]: Without dead ends: 258 [2024-11-28 03:58:00,861 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 126 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 169 ImplicationChecksByTransitivity, 12.7s TimeCoverageRelationStatistics Valid=233, Invalid=1249, Unknown=0, NotChecked=0, Total=1482 [2024-11-28 03:58:00,861 INFO L435 NwaCegarLoop]: 78 mSDtfsCounter, 58 mSDsluCounter, 932 mSDsCounter, 0 mSdLazyCounter, 482 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 1010 SdHoareTripleChecker+Invalid, 513 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 482 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.7s IncrementalHoareTripleChecker+Time [2024-11-28 03:58:00,861 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [59 Valid, 1010 Invalid, 513 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 482 Invalid, 0 Unknown, 0 Unchecked, 6.7s Time] [2024-11-28 03:58:00,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 258 states. [2024-11-28 03:58:00,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 258 to 238. [2024-11-28 03:58:00,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 238 states, 178 states have (on average 1.1067415730337078) internal successors, (197), 186 states have internal predecessors, (197), 37 states have call successors, (37), 17 states have call predecessors, (37), 22 states have return successors, (65), 34 states have call predecessors, (65), 36 states have call successors, (65) [2024-11-28 03:58:00,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 238 states to 238 states and 299 transitions. [2024-11-28 03:58:00,983 INFO L78 Accepts]: Start accepts. Automaton has 238 states and 299 transitions. Word has length 76 [2024-11-28 03:58:00,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 03:58:00,983 INFO L471 AbstractCegarLoop]: Abstraction has 238 states and 299 transitions. [2024-11-28 03:58:00,983 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.269230769230769) internal successors, (59), 26 states have internal predecessors, (59), 9 states have call successors, (12), 2 states have call predecessors, (12), 4 states have return successors, (12), 9 states have call predecessors, (12), 8 states have call successors, (12) [2024-11-28 03:58:00,983 INFO L276 IsEmpty]: Start isEmpty. Operand 238 states and 299 transitions. [2024-11-28 03:58:00,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2024-11-28 03:58:00,985 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 03:58:00,985 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:58:00,999 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dce12f9-b7f9-4583-bc8d-da617b5b33ec/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Forceful destruction successful, exit code 0 [2024-11-28 03:58:01,185 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dce12f9-b7f9-4583-bc8d-da617b5b33ec/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:58:01,188 INFO L396 AbstractCegarLoop]: === Iteration 47 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 03:58:01,189 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:58:01,189 INFO L85 PathProgramCache]: Analyzing trace with hash 893805912, now seen corresponding path program 1 times [2024-11-28 03:58:01,189 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-28 03:58:01,190 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1850275586] [2024-11-28 03:58:01,190 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 03:58:01,190 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:58:01,190 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dce12f9-b7f9-4583-bc8d-da617b5b33ec/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:58:01,193 INFO L229 MonitoredProcess]: Starting monitored process 53 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dce12f9-b7f9-4583-bc8d-da617b5b33ec/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:58:01,197 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dce12f9-b7f9-4583-bc8d-da617b5b33ec/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Waiting until timeout for monitored process [2024-11-28 03:58:01,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:58:01,304 INFO L256 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-11-28 03:58:01,305 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:58:01,801 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2024-11-28 03:58:01,801 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-28 03:58:01,802 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-28 03:58:01,802 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1850275586] [2024-11-28 03:58:01,802 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1850275586] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 03:58:01,802 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 03:58:01,802 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-11-28 03:58:01,802 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [346320586] [2024-11-28 03:58:01,802 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 03:58:01,803 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-28 03:58:01,803 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-28 03:58:01,803 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-28 03:58:01,803 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-28 03:58:01,803 INFO L87 Difference]: Start difference. First operand 238 states and 299 transitions. Second operand has 6 states, 6 states have (on average 6.666666666666667) internal successors, (40), 5 states have internal predecessors, (40), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 2 states have call predecessors, (6), 1 states have call successors, (6) [2024-11-28 03:58:02,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 03:58:02,207 INFO L93 Difference]: Finished difference Result 249 states and 310 transitions. [2024-11-28 03:58:02,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-28 03:58:02,208 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 6.666666666666667) internal successors, (40), 5 states have internal predecessors, (40), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 2 states have call predecessors, (6), 1 states have call successors, (6) Word has length 75 [2024-11-28 03:58:02,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 03:58:02,210 INFO L225 Difference]: With dead ends: 249 [2024-11-28 03:58:02,210 INFO L226 Difference]: Without dead ends: 237 [2024-11-28 03:58:02,210 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-28 03:58:02,211 INFO L435 NwaCegarLoop]: 67 mSDtfsCounter, 0 mSDsluCounter, 253 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 320 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-28 03:58:02,211 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 320 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-28 03:58:02,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 237 states. [2024-11-28 03:58:02,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 237 to 220. [2024-11-28 03:58:02,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 220 states, 165 states have (on average 1.103030303030303) internal successors, (182), 171 states have internal predecessors, (182), 34 states have call successors, (34), 16 states have call predecessors, (34), 20 states have return successors, (55), 32 states have call predecessors, (55), 33 states have call successors, (55) [2024-11-28 03:58:02,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 220 states to 220 states and 271 transitions. [2024-11-28 03:58:02,276 INFO L78 Accepts]: Start accepts. Automaton has 220 states and 271 transitions. Word has length 75 [2024-11-28 03:58:02,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 03:58:02,276 INFO L471 AbstractCegarLoop]: Abstraction has 220 states and 271 transitions. [2024-11-28 03:58:02,276 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 6.666666666666667) internal successors, (40), 5 states have internal predecessors, (40), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 2 states have call predecessors, (6), 1 states have call successors, (6) [2024-11-28 03:58:02,276 INFO L276 IsEmpty]: Start isEmpty. Operand 220 states and 271 transitions. [2024-11-28 03:58:02,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2024-11-28 03:58:02,277 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 03:58:02,277 INFO L218 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:58:02,285 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dce12f9-b7f9-4583-bc8d-da617b5b33ec/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Ended with exit code 0 [2024-11-28 03:58:02,477 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dce12f9-b7f9-4583-bc8d-da617b5b33ec/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:58:02,478 INFO L396 AbstractCegarLoop]: === Iteration 48 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 03:58:02,478 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:58:02,478 INFO L85 PathProgramCache]: Analyzing trace with hash 1446556424, now seen corresponding path program 1 times [2024-11-28 03:58:02,478 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-28 03:58:02,478 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [580925110] [2024-11-28 03:58:02,478 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 03:58:02,478 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:58:02,479 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dce12f9-b7f9-4583-bc8d-da617b5b33ec/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:58:02,481 INFO L229 MonitoredProcess]: Starting monitored process 54 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dce12f9-b7f9-4583-bc8d-da617b5b33ec/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:58:02,482 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dce12f9-b7f9-4583-bc8d-da617b5b33ec/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Waiting until timeout for monitored process [2024-11-28 03:58:02,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:58:02,575 INFO L256 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-11-28 03:58:02,577 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:58:06,357 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 26 proven. 3 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2024-11-28 03:58:06,358 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 03:58:08,224 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-28 03:58:08,224 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [580925110] [2024-11-28 03:58:08,224 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [580925110] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 03:58:08,224 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1575884143] [2024-11-28 03:58:08,224 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 03:58:08,224 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-11-28 03:58:08,225 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dce12f9-b7f9-4583-bc8d-da617b5b33ec/bin/uautomizer-verify-aQ6SnzHsRB/cvc4 [2024-11-28 03:58:08,227 INFO L229 MonitoredProcess]: Starting monitored process 55 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dce12f9-b7f9-4583-bc8d-da617b5b33ec/bin/uautomizer-verify-aQ6SnzHsRB/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2024-11-28 03:58:08,229 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dce12f9-b7f9-4583-bc8d-da617b5b33ec/bin/uautomizer-verify-aQ6SnzHsRB/cvc4 --incremental --print-success --lang smt (55)] Waiting until timeout for monitored process [2024-11-28 03:58:08,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:58:08,418 INFO L256 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 13 conjuncts are in the unsatisfiable core [2024-11-28 03:58:08,420 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:58:10,735 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 20 proven. 3 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-11-28 03:58:10,736 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 03:58:12,027 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1575884143] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 03:58:12,027 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-28 03:58:12,027 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12] total 15 [2024-11-28 03:58:12,027 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [365173904] [2024-11-28 03:58:12,028 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-28 03:58:12,028 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-11-28 03:58:12,029 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-28 03:58:12,029 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-11-28 03:58:12,029 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=207, Unknown=0, NotChecked=0, Total=240 [2024-11-28 03:58:12,029 INFO L87 Difference]: Start difference. First operand 220 states and 271 transitions. Second operand has 15 states, 14 states have (on average 3.9285714285714284) internal successors, (55), 14 states have internal predecessors, (55), 6 states have call successors, (10), 2 states have call predecessors, (10), 4 states have return successors, (9), 6 states have call predecessors, (9), 5 states have call successors, (9) [2024-11-28 03:58:23,029 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 03:58:23,029 INFO L93 Difference]: Finished difference Result 247 states and 304 transitions. [2024-11-28 03:58:23,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-11-28 03:58:23,030 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 3.9285714285714284) internal successors, (55), 14 states have internal predecessors, (55), 6 states have call successors, (10), 2 states have call predecessors, (10), 4 states have return successors, (9), 6 states have call predecessors, (9), 5 states have call successors, (9) Word has length 80 [2024-11-28 03:58:23,030 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 03:58:23,031 INFO L225 Difference]: With dead ends: 247 [2024-11-28 03:58:23,031 INFO L226 Difference]: Without dead ends: 238 [2024-11-28 03:58:23,032 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 183 GetRequests, 159 SyntacticMatches, 4 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 7.5s TimeCoverageRelationStatistics Valid=63, Invalid=399, Unknown=0, NotChecked=0, Total=462 [2024-11-28 03:58:23,032 INFO L435 NwaCegarLoop]: 75 mSDtfsCounter, 27 mSDsluCounter, 878 mSDsCounter, 0 mSdLazyCounter, 406 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 953 SdHoareTripleChecker+Invalid, 410 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 406 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.3s IncrementalHoareTripleChecker+Time [2024-11-28 03:58:23,033 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 953 Invalid, 410 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 406 Invalid, 0 Unknown, 0 Unchecked, 9.3s Time] [2024-11-28 03:58:23,033 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 238 states. [2024-11-28 03:58:23,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 238 to 226. [2024-11-28 03:58:23,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 226 states, 169 states have (on average 1.1005917159763314) internal successors, (186), 175 states have internal predecessors, (186), 35 states have call successors, (35), 16 states have call predecessors, (35), 21 states have return successors, (62), 34 states have call predecessors, (62), 34 states have call successors, (62) [2024-11-28 03:58:23,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 226 states to 226 states and 283 transitions. [2024-11-28 03:58:23,121 INFO L78 Accepts]: Start accepts. Automaton has 226 states and 283 transitions. Word has length 80 [2024-11-28 03:58:23,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 03:58:23,122 INFO L471 AbstractCegarLoop]: Abstraction has 226 states and 283 transitions. [2024-11-28 03:58:23,122 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 3.9285714285714284) internal successors, (55), 14 states have internal predecessors, (55), 6 states have call successors, (10), 2 states have call predecessors, (10), 4 states have return successors, (9), 6 states have call predecessors, (9), 5 states have call successors, (9) [2024-11-28 03:58:23,122 INFO L276 IsEmpty]: Start isEmpty. Operand 226 states and 283 transitions. [2024-11-28 03:58:23,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2024-11-28 03:58:23,124 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 03:58:23,124 INFO L218 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:58:23,135 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dce12f9-b7f9-4583-bc8d-da617b5b33ec/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Ended with exit code 0 [2024-11-28 03:58:23,327 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dce12f9-b7f9-4583-bc8d-da617b5b33ec/bin/uautomizer-verify-aQ6SnzHsRB/cvc4 --incremental --print-success --lang smt (55)] Ended with exit code 0 [2024-11-28 03:58:23,524 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dce12f9-b7f9-4583-bc8d-da617b5b33ec/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,55 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dce12f9-b7f9-4583-bc8d-da617b5b33ec/bin/uautomizer-verify-aQ6SnzHsRB/cvc4 --incremental --print-success --lang smt [2024-11-28 03:58:23,525 INFO L396 AbstractCegarLoop]: === Iteration 49 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 03:58:23,525 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:58:23,525 INFO L85 PathProgramCache]: Analyzing trace with hash -1462207478, now seen corresponding path program 1 times [2024-11-28 03:58:23,525 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-28 03:58:23,525 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2070795941] [2024-11-28 03:58:23,526 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 03:58:23,526 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:58:23,526 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dce12f9-b7f9-4583-bc8d-da617b5b33ec/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:58:23,531 INFO L229 MonitoredProcess]: Starting monitored process 56 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dce12f9-b7f9-4583-bc8d-da617b5b33ec/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:58:23,533 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dce12f9-b7f9-4583-bc8d-da617b5b33ec/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Waiting until timeout for monitored process [2024-11-28 03:58:23,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:58:23,628 INFO L256 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-11-28 03:58:23,629 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:58:35,481 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 20 proven. 3 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-11-28 03:58:35,481 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 03:58:38,981 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-28 03:58:38,981 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2070795941] [2024-11-28 03:58:38,981 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2070795941] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 03:58:38,982 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [25231784] [2024-11-28 03:58:38,982 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 03:58:38,982 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-11-28 03:58:38,982 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dce12f9-b7f9-4583-bc8d-da617b5b33ec/bin/uautomizer-verify-aQ6SnzHsRB/cvc4 [2024-11-28 03:58:38,984 INFO L229 MonitoredProcess]: Starting monitored process 57 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dce12f9-b7f9-4583-bc8d-da617b5b33ec/bin/uautomizer-verify-aQ6SnzHsRB/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2024-11-28 03:58:38,986 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dce12f9-b7f9-4583-bc8d-da617b5b33ec/bin/uautomizer-verify-aQ6SnzHsRB/cvc4 --incremental --print-success --lang smt (57)] Waiting until timeout for monitored process [2024-11-28 03:58:39,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:58:39,183 INFO L256 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 15 conjuncts are in the unsatisfiable core [2024-11-28 03:58:39,185 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:59:12,004 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 20 proven. 3 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-11-28 03:59:12,004 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 03:59:14,873 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [25231784] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 03:59:14,873 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-28 03:59:14,873 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 16 [2024-11-28 03:59:14,874 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1217306348] [2024-11-28 03:59:14,874 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-28 03:59:14,874 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-11-28 03:59:14,874 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-28 03:59:14,874 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-11-28 03:59:14,875 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=230, Unknown=6, NotChecked=0, Total=272 [2024-11-28 03:59:14,875 INFO L87 Difference]: Start difference. First operand 226 states and 283 transitions. Second operand has 16 states, 16 states have (on average 3.4375) internal successors, (55), 15 states have internal predecessors, (55), 5 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (8), 6 states have call predecessors, (8), 4 states have call successors, (8) [2024-11-28 03:59:20,219 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.89s for a HTC check with result INVALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2024-11-28 03:59:24,797 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2024-11-28 03:59:30,704 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2024-11-28 03:59:34,801 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2024-11-28 03:59:38,014 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.21s for a HTC check with result INVALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2024-11-28 03:59:41,897 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 03:59:41,897 INFO L93 Difference]: Finished difference Result 253 states and 309 transitions. [2024-11-28 03:59:41,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-11-28 03:59:41,898 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.4375) internal successors, (55), 15 states have internal predecessors, (55), 5 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (8), 6 states have call predecessors, (8), 4 states have call successors, (8) Word has length 80 [2024-11-28 03:59:41,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 03:59:41,899 INFO L225 Difference]: With dead ends: 253 [2024-11-28 03:59:41,899 INFO L226 Difference]: Without dead ends: 244 [2024-11-28 03:59:41,900 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 159 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 47.0s TimeCoverageRelationStatistics Valid=41, Invalid=259, Unknown=6, NotChecked=0, Total=306 [2024-11-28 03:59:41,900 INFO L435 NwaCegarLoop]: 77 mSDtfsCounter, 9 mSDsluCounter, 818 mSDsCounter, 0 mSdLazyCounter, 306 mSolverCounterSat, 1 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 26.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 895 SdHoareTripleChecker+Invalid, 310 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 306 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 26.6s IncrementalHoareTripleChecker+Time [2024-11-28 03:59:41,900 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 895 Invalid, 310 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 306 Invalid, 3 Unknown, 0 Unchecked, 26.6s Time] [2024-11-28 03:59:41,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 244 states. [2024-11-28 03:59:41,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 244 to 230. [2024-11-28 03:59:41,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 230 states, 172 states have (on average 1.0988372093023255) internal successors, (189), 178 states have internal predecessors, (189), 35 states have call successors, (35), 16 states have call predecessors, (35), 22 states have return successors, (62), 35 states have call predecessors, (62), 34 states have call successors, (62) [2024-11-28 03:59:41,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 230 states to 230 states and 286 transitions. [2024-11-28 03:59:41,958 INFO L78 Accepts]: Start accepts. Automaton has 230 states and 286 transitions. Word has length 80 [2024-11-28 03:59:41,958 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 03:59:41,958 INFO L471 AbstractCegarLoop]: Abstraction has 230 states and 286 transitions. [2024-11-28 03:59:41,958 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.4375) internal successors, (55), 15 states have internal predecessors, (55), 5 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (8), 6 states have call predecessors, (8), 4 states have call successors, (8) [2024-11-28 03:59:41,958 INFO L276 IsEmpty]: Start isEmpty. Operand 230 states and 286 transitions. [2024-11-28 03:59:41,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2024-11-28 03:59:41,959 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 03:59:41,959 INFO L218 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:59:41,963 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dce12f9-b7f9-4583-bc8d-da617b5b33ec/bin/uautomizer-verify-aQ6SnzHsRB/cvc4 --incremental --print-success --lang smt (57)] Forceful destruction successful, exit code 0 [2024-11-28 03:59:42,167 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dce12f9-b7f9-4583-bc8d-da617b5b33ec/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Ended with exit code 0 [2024-11-28 03:59:42,360 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 57 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dce12f9-b7f9-4583-bc8d-da617b5b33ec/bin/uautomizer-verify-aQ6SnzHsRB/cvc4 --incremental --print-success --lang smt,56 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dce12f9-b7f9-4583-bc8d-da617b5b33ec/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:59:42,360 INFO L396 AbstractCegarLoop]: === Iteration 50 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 03:59:42,360 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:59:42,360 INFO L85 PathProgramCache]: Analyzing trace with hash 1513762048, now seen corresponding path program 1 times [2024-11-28 03:59:42,360 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-28 03:59:42,361 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1380512381] [2024-11-28 03:59:42,361 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 03:59:42,361 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:59:42,361 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dce12f9-b7f9-4583-bc8d-da617b5b33ec/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:59:42,362 INFO L229 MonitoredProcess]: Starting monitored process 58 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dce12f9-b7f9-4583-bc8d-da617b5b33ec/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:59:42,363 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dce12f9-b7f9-4583-bc8d-da617b5b33ec/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Waiting until timeout for monitored process [2024-11-28 03:59:42,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:59:42,452 INFO L256 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 24 conjuncts are in the unsatisfiable core [2024-11-28 03:59:42,454 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:59:45,594 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 6 proven. 9 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2024-11-28 03:59:45,594 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 03:59:52,835 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2024-11-28 03:59:52,835 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-28 03:59:52,835 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1380512381] [2024-11-28 03:59:52,835 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1380512381] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 03:59:52,835 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-28 03:59:52,835 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15] total 26 [2024-11-28 03:59:52,836 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2007186583] [2024-11-28 03:59:52,836 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-28 03:59:52,836 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2024-11-28 03:59:52,836 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-28 03:59:52,837 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2024-11-28 03:59:52,837 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=555, Unknown=0, NotChecked=0, Total=650 [2024-11-28 03:59:52,837 INFO L87 Difference]: Start difference. First operand 230 states and 286 transitions. Second operand has 26 states, 26 states have (on average 2.3076923076923075) internal successors, (60), 26 states have internal predecessors, (60), 9 states have call successors, (12), 2 states have call predecessors, (12), 4 states have return successors, (12), 9 states have call predecessors, (12), 8 states have call successors, (12) [2024-11-28 03:59:59,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 03:59:59,892 INFO L93 Difference]: Finished difference Result 272 states and 332 transitions. [2024-11-28 03:59:59,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2024-11-28 03:59:59,894 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.3076923076923075) internal successors, (60), 26 states have internal predecessors, (60), 9 states have call successors, (12), 2 states have call predecessors, (12), 4 states have return successors, (12), 9 states have call predecessors, (12), 8 states have call successors, (12) Word has length 77 [2024-11-28 03:59:59,894 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 03:59:59,895 INFO L225 Difference]: With dead ends: 272 [2024-11-28 03:59:59,895 INFO L226 Difference]: Without dead ends: 215 [2024-11-28 03:59:59,895 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 128 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 8.9s TimeCoverageRelationStatistics Valid=171, Invalid=885, Unknown=0, NotChecked=0, Total=1056 [2024-11-28 03:59:59,896 INFO L435 NwaCegarLoop]: 63 mSDtfsCounter, 40 mSDsluCounter, 851 mSDsCounter, 0 mSdLazyCounter, 428 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 914 SdHoareTripleChecker+Invalid, 444 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 428 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.0s IncrementalHoareTripleChecker+Time [2024-11-28 03:59:59,896 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [40 Valid, 914 Invalid, 444 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 428 Invalid, 0 Unknown, 0 Unchecked, 5.0s Time] [2024-11-28 03:59:59,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 215 states. [2024-11-28 03:59:59,983 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 215 to 204. [2024-11-28 03:59:59,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 204 states, 152 states have (on average 1.0921052631578947) internal successors, (166), 157 states have internal predecessors, (166), 31 states have call successors, (31), 15 states have call predecessors, (31), 20 states have return successors, (56), 31 states have call predecessors, (56), 30 states have call successors, (56) [2024-11-28 03:59:59,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 204 states to 204 states and 253 transitions. [2024-11-28 03:59:59,985 INFO L78 Accepts]: Start accepts. Automaton has 204 states and 253 transitions. Word has length 77 [2024-11-28 03:59:59,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 03:59:59,986 INFO L471 AbstractCegarLoop]: Abstraction has 204 states and 253 transitions. [2024-11-28 03:59:59,986 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.3076923076923075) internal successors, (60), 26 states have internal predecessors, (60), 9 states have call successors, (12), 2 states have call predecessors, (12), 4 states have return successors, (12), 9 states have call predecessors, (12), 8 states have call successors, (12) [2024-11-28 03:59:59,986 INFO L276 IsEmpty]: Start isEmpty. Operand 204 states and 253 transitions. [2024-11-28 03:59:59,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2024-11-28 03:59:59,988 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 03:59:59,988 INFO L218 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:59:59,997 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dce12f9-b7f9-4583-bc8d-da617b5b33ec/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Ended with exit code 0 [2024-11-28 04:00:00,189 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 58 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dce12f9-b7f9-4583-bc8d-da617b5b33ec/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:00:00,189 INFO L396 AbstractCegarLoop]: === Iteration 51 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 04:00:00,189 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:00:00,189 INFO L85 PathProgramCache]: Analyzing trace with hash -601941872, now seen corresponding path program 1 times [2024-11-28 04:00:00,190 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-28 04:00:00,190 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1053008828] [2024-11-28 04:00:00,190 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 04:00:00,190 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:00:00,190 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dce12f9-b7f9-4583-bc8d-da617b5b33ec/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:00:00,192 INFO L229 MonitoredProcess]: Starting monitored process 59 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dce12f9-b7f9-4583-bc8d-da617b5b33ec/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 04:00:00,193 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dce12f9-b7f9-4583-bc8d-da617b5b33ec/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Waiting until timeout for monitored process [2024-11-28 04:00:00,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 04:00:00,379 INFO L256 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 45 conjuncts are in the unsatisfiable core [2024-11-28 04:00:00,382 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:00:10,611 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 12 proven. 10 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2024-11-28 04:00:10,612 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 04:00:40,283 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 12 proven. 11 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-11-28 04:00:40,283 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-28 04:00:40,283 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1053008828] [2024-11-28 04:00:40,283 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1053008828] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 04:00:40,283 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-28 04:00:40,283 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 26] total 47 [2024-11-28 04:00:40,283 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1737985939] [2024-11-28 04:00:40,283 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-28 04:00:40,284 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2024-11-28 04:00:40,284 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-28 04:00:40,285 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2024-11-28 04:00:40,285 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=245, Invalid=1917, Unknown=0, NotChecked=0, Total=2162 [2024-11-28 04:00:40,285 INFO L87 Difference]: Start difference. First operand 204 states and 253 transitions. Second operand has 47 states, 45 states have (on average 1.711111111111111) internal successors, (77), 43 states have internal predecessors, (77), 10 states have call successors, (13), 2 states have call predecessors, (13), 6 states have return successors, (13), 11 states have call predecessors, (13), 9 states have call successors, (13)