./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/recursified_loop-simple/recursified_nested_4.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_e815c5b8-bb3f-489e-8797-c12c12d6812b/bin/uautomizer-verify-aQ6SnzHsRB/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e815c5b8-bb3f-489e-8797-c12c12d6812b/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_e815c5b8-bb3f-489e-8797-c12c12d6812b/bin/uautomizer-verify-aQ6SnzHsRB/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e815c5b8-bb3f-489e-8797-c12c12d6812b/bin/uautomizer-verify-aQ6SnzHsRB/config/AutomizerReach.xml -i ../../sv-benchmarks/c/recursified_loop-simple/recursified_nested_4.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e815c5b8-bb3f-489e-8797-c12c12d6812b/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_e815c5b8-bb3f-489e-8797-c12c12d6812b/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 45898d4df949634911027a72c0e1c79e1edaab63547cca5c16238cef1218e556 --- Real Ultimate output --- This is Ultimate 0.3.0-dev-d790fec [2024-11-27 19:54:13,099 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-27 19:54:13,180 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e815c5b8-bb3f-489e-8797-c12c12d6812b/bin/uautomizer-verify-aQ6SnzHsRB/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-11-27 19:54:13,187 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-27 19:54:13,188 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-27 19:54:13,212 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-27 19:54:13,213 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-27 19:54:13,213 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-27 19:54:13,214 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-27 19:54:13,214 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-27 19:54:13,214 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-27 19:54:13,214 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-27 19:54:13,214 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-27 19:54:13,214 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-27 19:54:13,215 INFO L153 SettingsManager]: * Use SBE=true [2024-11-27 19:54:13,215 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-27 19:54:13,215 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-27 19:54:13,215 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-27 19:54:13,215 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-27 19:54:13,215 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-27 19:54:13,216 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-27 19:54:13,216 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-27 19:54:13,216 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-27 19:54:13,216 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-27 19:54:13,216 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-27 19:54:13,216 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-27 19:54:13,216 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2024-11-27 19:54:13,217 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-27 19:54:13,217 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2024-11-27 19:54:13,217 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-27 19:54:13,217 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-27 19:54:13,217 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-27 19:54:13,217 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-27 19:54:13,217 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-27 19:54:13,218 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-27 19:54:13,218 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-27 19:54:13,218 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-27 19:54:13,218 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-27 19:54:13,218 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-27 19:54:13,218 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-27 19:54:13,219 INFO L153 SettingsManager]: * Compute procedure contracts=false [2024-11-27 19:54:13,219 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-27 19:54:13,219 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-27 19:54:13,219 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-27 19:54:13,219 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-27 19:54:13,219 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-27 19:54:13,219 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-27 19:54:13,219 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-27 19:54:13,220 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_e815c5b8-bb3f-489e-8797-c12c12d6812b/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 -> 45898d4df949634911027a72c0e1c79e1edaab63547cca5c16238cef1218e556 [2024-11-27 19:54:13,515 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-27 19:54:13,524 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-27 19:54:13,526 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-27 19:54:13,527 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-27 19:54:13,528 INFO L274 PluginConnector]: CDTParser initialized [2024-11-27 19:54:13,528 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e815c5b8-bb3f-489e-8797-c12c12d6812b/bin/uautomizer-verify-aQ6SnzHsRB/../../sv-benchmarks/c/recursified_loop-simple/recursified_nested_4.c [2024-11-27 19:54:16,617 INFO L533 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e815c5b8-bb3f-489e-8797-c12c12d6812b/bin/uautomizer-verify-aQ6SnzHsRB/data/38de58d5e/feb606a90c9a4dd7b76135397be53e35/FLAG6123e0128 [2024-11-27 19:54:16,929 INFO L384 CDTParser]: Found 1 translation units. [2024-11-27 19:54:16,930 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e815c5b8-bb3f-489e-8797-c12c12d6812b/sv-benchmarks/c/recursified_loop-simple/recursified_nested_4.c [2024-11-27 19:54:16,942 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e815c5b8-bb3f-489e-8797-c12c12d6812b/bin/uautomizer-verify-aQ6SnzHsRB/data/38de58d5e/feb606a90c9a4dd7b76135397be53e35/FLAG6123e0128 [2024-11-27 19:54:16,965 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e815c5b8-bb3f-489e-8797-c12c12d6812b/bin/uautomizer-verify-aQ6SnzHsRB/data/38de58d5e/feb606a90c9a4dd7b76135397be53e35 [2024-11-27 19:54:16,969 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-27 19:54:16,971 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-27 19:54:16,972 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-27 19:54:16,973 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-27 19:54:16,978 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-27 19:54:16,979 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.11 07:54:16" (1/1) ... [2024-11-27 19:54:16,982 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1f8f43a0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 07:54:16, skipping insertion in model container [2024-11-27 19:54:16,982 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.11 07:54:16" (1/1) ... [2024-11-27 19:54:17,005 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-27 19:54:17,213 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_e815c5b8-bb3f-489e-8797-c12c12d6812b/sv-benchmarks/c/recursified_loop-simple/recursified_nested_4.c[2333,2346] [2024-11-27 19:54:17,218 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-27 19:54:17,231 INFO L200 MainTranslator]: Completed pre-run [2024-11-27 19:54:17,261 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_e815c5b8-bb3f-489e-8797-c12c12d6812b/sv-benchmarks/c/recursified_loop-simple/recursified_nested_4.c[2333,2346] [2024-11-27 19:54:17,265 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-27 19:54:17,284 INFO L204 MainTranslator]: Completed translation [2024-11-27 19:54:17,285 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 07:54:17 WrapperNode [2024-11-27 19:54:17,285 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-27 19:54:17,287 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-27 19:54:17,287 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-27 19:54:17,287 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-27 19:54:17,302 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 07:54:17" (1/1) ... [2024-11-27 19:54:17,318 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 07:54:17" (1/1) ... [2024-11-27 19:54:17,343 INFO L138 Inliner]: procedures = 15, calls = 51, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 66 [2024-11-27 19:54:17,345 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-27 19:54:17,346 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-27 19:54:17,346 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-27 19:54:17,346 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-27 19:54:17,357 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 07:54:17" (1/1) ... [2024-11-27 19:54:17,358 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 07:54:17" (1/1) ... [2024-11-27 19:54:17,360 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 07:54:17" (1/1) ... [2024-11-27 19:54:17,392 INFO L175 MemorySlicer]: Split 26 memory accesses to 5 slices as follows [2, 6, 6, 6, 6]. 23 percent of accesses are in the largest equivalence class. The 6 initializations are split as follows [2, 1, 1, 1, 1]. The 8 writes are split as follows [0, 2, 2, 2, 2]. [2024-11-27 19:54:17,393 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 07:54:17" (1/1) ... [2024-11-27 19:54:17,394 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 07:54:17" (1/1) ... [2024-11-27 19:54:17,404 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 07:54:17" (1/1) ... [2024-11-27 19:54:17,404 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 07:54:17" (1/1) ... [2024-11-27 19:54:17,411 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 07:54:17" (1/1) ... [2024-11-27 19:54:17,412 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 07:54:17" (1/1) ... [2024-11-27 19:54:17,413 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 07:54:17" (1/1) ... [2024-11-27 19:54:17,419 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-27 19:54:17,420 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-27 19:54:17,420 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-27 19:54:17,420 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-27 19:54:17,421 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 07:54:17" (1/1) ... [2024-11-27 19:54:17,433 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-27 19:54:17,446 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e815c5b8-bb3f-489e-8797-c12c12d6812b/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 19:54:17,465 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e815c5b8-bb3f-489e-8797-c12c12d6812b/bin/uautomizer-verify-aQ6SnzHsRB/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-11-27 19:54:17,470 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e815c5b8-bb3f-489e-8797-c12c12d6812b/bin/uautomizer-verify-aQ6SnzHsRB/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-11-27 19:54:17,500 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-27 19:54:17,500 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-27 19:54:17,501 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-11-27 19:54:17,501 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-11-27 19:54:17,501 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2024-11-27 19:54:17,501 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#4 [2024-11-27 19:54:17,501 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-11-27 19:54:17,501 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-11-27 19:54:17,501 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-11-27 19:54:17,501 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-11-27 19:54:17,502 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2024-11-27 19:54:17,502 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#4 [2024-11-27 19:54:17,502 INFO L130 BoogieDeclarations]: Found specification of procedure func_to_recursive_line_24_to_25_0 [2024-11-27 19:54:17,502 INFO L138 BoogieDeclarations]: Found implementation of procedure func_to_recursive_line_24_to_25_0 [2024-11-27 19:54:17,502 INFO L130 BoogieDeclarations]: Found specification of procedure func_to_recursive_line_23_to_24_0 [2024-11-27 19:54:17,502 INFO L138 BoogieDeclarations]: Found implementation of procedure func_to_recursive_line_23_to_24_0 [2024-11-27 19:54:17,502 INFO L130 BoogieDeclarations]: Found specification of procedure func_to_recursive_line_22_to_23_0 [2024-11-27 19:54:17,503 INFO L138 BoogieDeclarations]: Found implementation of procedure func_to_recursive_line_22_to_23_0 [2024-11-27 19:54:17,503 INFO L130 BoogieDeclarations]: Found specification of procedure func_to_recursive_line_25_to_25_0 [2024-11-27 19:54:17,503 INFO L138 BoogieDeclarations]: Found implementation of procedure func_to_recursive_line_25_to_25_0 [2024-11-27 19:54:17,503 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-27 19:54:17,503 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-27 19:54:17,503 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-11-27 19:54:17,503 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-11-27 19:54:17,503 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-11-27 19:54:17,503 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2024-11-27 19:54:17,504 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#4 [2024-11-27 19:54:17,504 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-11-27 19:54:17,619 INFO L234 CfgBuilder]: Building ICFG [2024-11-27 19:54:17,621 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-27 19:54:17,845 INFO L? ?]: Removed 12 outVars from TransFormulas that were not future-live. [2024-11-27 19:54:17,846 INFO L283 CfgBuilder]: Performing block encoding [2024-11-27 19:54:17,858 INFO L307 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-27 19:54:17,858 INFO L312 CfgBuilder]: Removed 0 assume(true) statements. [2024-11-27 19:54:17,861 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.11 07:54:17 BoogieIcfgContainer [2024-11-27 19:54:17,861 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-27 19:54:17,865 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-27 19:54:17,867 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-27 19:54:17,873 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-27 19:54:17,873 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.11 07:54:16" (1/3) ... [2024-11-27 19:54:17,874 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@75de8e02 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.11 07:54:17, skipping insertion in model container [2024-11-27 19:54:17,874 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 07:54:17" (2/3) ... [2024-11-27 19:54:17,875 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@75de8e02 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.11 07:54:17, skipping insertion in model container [2024-11-27 19:54:17,875 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.11 07:54:17" (3/3) ... [2024-11-27 19:54:17,878 INFO L128 eAbstractionObserver]: Analyzing ICFG recursified_nested_4.c [2024-11-27 19:54:17,896 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-27 19:54:17,898 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG recursified_nested_4.c that has 5 procedures, 42 locations, 1 initial locations, 0 loop locations, and 1 error locations. [2024-11-27 19:54:17,975 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-27 19:54:17,993 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;@36ff0c9b, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-27 19:54:17,993 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-11-27 19:54:18,000 INFO L276 IsEmpty]: Start isEmpty. Operand has 42 states, 28 states have (on average 1.3214285714285714) internal successors, (37), 33 states have internal predecessors, (37), 8 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2024-11-27 19:54:18,009 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2024-11-27 19:54:18,009 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 19:54:18,010 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 19:54:18,011 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-27 19:54:18,018 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 19:54:18,018 INFO L85 PathProgramCache]: Analyzing trace with hash 1439893324, now seen corresponding path program 1 times [2024-11-27 19:54:18,027 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 19:54:18,027 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [103325916] [2024-11-27 19:54:18,028 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 19:54:18,028 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 19:54:18,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 19:54:18,911 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-27 19:54:18,912 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 19:54:18,912 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [103325916] [2024-11-27 19:54:18,913 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [103325916] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-27 19:54:18,913 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-27 19:54:18,914 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-11-27 19:54:18,916 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1681729203] [2024-11-27 19:54:18,917 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-27 19:54:18,922 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-27 19:54:18,922 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 19:54:18,945 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-27 19:54:18,945 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-11-27 19:54:18,948 INFO L87 Difference]: Start difference. First operand has 42 states, 28 states have (on average 1.3214285714285714) internal successors, (37), 33 states have internal predecessors, (37), 8 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) Second operand has 6 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-11-27 19:54:19,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 19:54:19,247 INFO L93 Difference]: Finished difference Result 57 states and 72 transitions. [2024-11-27 19:54:19,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-27 19:54:19,251 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 15 [2024-11-27 19:54:19,251 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 19:54:19,258 INFO L225 Difference]: With dead ends: 57 [2024-11-27 19:54:19,258 INFO L226 Difference]: Without dead ends: 40 [2024-11-27 19:54:19,262 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-11-27 19:54:19,264 INFO L435 NwaCegarLoop]: 22 mSDtfsCounter, 21 mSDsluCounter, 49 mSDsCounter, 0 mSdLazyCounter, 134 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 71 SdHoareTripleChecker+Invalid, 136 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 134 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-27 19:54:19,265 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 71 Invalid, 136 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 134 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-27 19:54:19,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2024-11-27 19:54:19,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2024-11-27 19:54:19,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 26 states have (on average 1.2692307692307692) internal successors, (33), 30 states have internal predecessors, (33), 8 states have call successors, (8), 4 states have call predecessors, (8), 5 states have return successors, (9), 8 states have call predecessors, (9), 8 states have call successors, (9) [2024-11-27 19:54:19,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 50 transitions. [2024-11-27 19:54:19,315 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 50 transitions. Word has length 15 [2024-11-27 19:54:19,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-27 19:54:19,316 INFO L471 AbstractCegarLoop]: Abstraction has 40 states and 50 transitions. [2024-11-27 19:54:19,317 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-11-27 19:54:19,317 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 50 transitions. [2024-11-27 19:54:19,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2024-11-27 19:54:19,321 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 19:54:19,321 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 19:54:19,321 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-27 19:54:19,321 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-27 19:54:19,322 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 19:54:19,322 INFO L85 PathProgramCache]: Analyzing trace with hash 2118287023, now seen corresponding path program 1 times [2024-11-27 19:54:19,322 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 19:54:19,323 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1255030630] [2024-11-27 19:54:19,324 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 19:54:19,325 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 19:54:19,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 19:54:19,794 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-27 19:54:19,795 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 19:54:19,795 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1255030630] [2024-11-27 19:54:19,796 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1255030630] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-27 19:54:19,796 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-27 19:54:19,796 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-11-27 19:54:19,796 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1869792978] [2024-11-27 19:54:19,796 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-27 19:54:19,797 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-27 19:54:19,798 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 19:54:19,799 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-27 19:54:19,799 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-11-27 19:54:19,800 INFO L87 Difference]: Start difference. First operand 40 states and 50 transitions. Second operand has 6 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 3 states have call successors, (3), 2 states have call predecessors, (3), 3 states have return successors, (3), 1 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-27 19:54:19,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 19:54:19,986 INFO L93 Difference]: Finished difference Result 79 states and 101 transitions. [2024-11-27 19:54:19,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-27 19:54:19,987 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 3 states have call successors, (3), 2 states have call predecessors, (3), 3 states have return successors, (3), 1 states have call predecessors, (3), 3 states have call successors, (3) Word has length 26 [2024-11-27 19:54:19,987 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 19:54:19,989 INFO L225 Difference]: With dead ends: 79 [2024-11-27 19:54:19,989 INFO L226 Difference]: Without dead ends: 42 [2024-11-27 19:54:19,990 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-11-27 19:54:19,991 INFO L435 NwaCegarLoop]: 26 mSDtfsCounter, 17 mSDsluCounter, 56 mSDsCounter, 0 mSdLazyCounter, 108 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 82 SdHoareTripleChecker+Invalid, 112 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 108 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-27 19:54:19,992 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 82 Invalid, 112 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 108 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-27 19:54:19,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2024-11-27 19:54:20,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2024-11-27 19:54:20,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 27 states have (on average 1.2592592592592593) internal successors, (34), 31 states have internal predecessors, (34), 8 states have call successors, (8), 4 states have call predecessors, (8), 6 states have return successors, (10), 8 states have call predecessors, (10), 8 states have call successors, (10) [2024-11-27 19:54:20,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 52 transitions. [2024-11-27 19:54:20,006 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 52 transitions. Word has length 26 [2024-11-27 19:54:20,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-27 19:54:20,006 INFO L471 AbstractCegarLoop]: Abstraction has 42 states and 52 transitions. [2024-11-27 19:54:20,007 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 3 states have call successors, (3), 2 states have call predecessors, (3), 3 states have return successors, (3), 1 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-27 19:54:20,007 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 52 transitions. [2024-11-27 19:54:20,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2024-11-27 19:54:20,010 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 19:54:20,010 INFO L218 NwaCegarLoop]: trace histogram [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] [2024-11-27 19:54:20,011 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-27 19:54:20,011 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-27 19:54:20,012 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 19:54:20,013 INFO L85 PathProgramCache]: Analyzing trace with hash 932350083, now seen corresponding path program 1 times [2024-11-27 19:54:20,013 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 19:54:20,013 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [987447852] [2024-11-27 19:54:20,013 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 19:54:20,013 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 19:54:20,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 19:54:20,383 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-27 19:54:20,384 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 19:54:20,384 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [987447852] [2024-11-27 19:54:20,384 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [987447852] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-27 19:54:20,384 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-27 19:54:20,384 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-11-27 19:54:20,384 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [223338977] [2024-11-27 19:54:20,384 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-27 19:54:20,385 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-27 19:54:20,385 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 19:54:20,385 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-27 19:54:20,385 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-11-27 19:54:20,386 INFO L87 Difference]: Start difference. First operand 42 states and 52 transitions. Second operand has 6 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (5), 1 states have call predecessors, (5), 3 states have call successors, (5) [2024-11-27 19:54:20,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 19:54:20,513 INFO L93 Difference]: Finished difference Result 83 states and 107 transitions. [2024-11-27 19:54:20,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-27 19:54:20,514 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (5), 1 states have call predecessors, (5), 3 states have call successors, (5) Word has length 37 [2024-11-27 19:54:20,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 19:54:20,515 INFO L225 Difference]: With dead ends: 83 [2024-11-27 19:54:20,515 INFO L226 Difference]: Without dead ends: 44 [2024-11-27 19:54:20,515 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-11-27 19:54:20,516 INFO L435 NwaCegarLoop]: 35 mSDtfsCounter, 14 mSDsluCounter, 74 mSDsCounter, 0 mSdLazyCounter, 82 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 109 SdHoareTripleChecker+Invalid, 88 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 82 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-27 19:54:20,516 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 109 Invalid, 88 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 82 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-27 19:54:20,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2024-11-27 19:54:20,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2024-11-27 19:54:20,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 28 states have (on average 1.25) internal successors, (35), 32 states have internal predecessors, (35), 8 states have call successors, (8), 4 states have call predecessors, (8), 7 states have return successors, (11), 8 states have call predecessors, (11), 8 states have call successors, (11) [2024-11-27 19:54:20,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 54 transitions. [2024-11-27 19:54:20,524 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 54 transitions. Word has length 37 [2024-11-27 19:54:20,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-27 19:54:20,524 INFO L471 AbstractCegarLoop]: Abstraction has 44 states and 54 transitions. [2024-11-27 19:54:20,524 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (5), 1 states have call predecessors, (5), 3 states have call successors, (5) [2024-11-27 19:54:20,525 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 54 transitions. [2024-11-27 19:54:20,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2024-11-27 19:54:20,525 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 19:54:20,526 INFO L218 NwaCegarLoop]: trace histogram [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] [2024-11-27 19:54:20,526 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-11-27 19:54:20,526 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-27 19:54:20,526 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 19:54:20,526 INFO L85 PathProgramCache]: Analyzing trace with hash 718933668, now seen corresponding path program 1 times [2024-11-27 19:54:20,527 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 19:54:20,527 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1071634242] [2024-11-27 19:54:20,527 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 19:54:20,527 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 19:54:20,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 19:54:20,841 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-27 19:54:20,842 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 19:54:20,842 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1071634242] [2024-11-27 19:54:20,842 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1071634242] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-27 19:54:20,842 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-27 19:54:20,842 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-11-27 19:54:20,842 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1159408532] [2024-11-27 19:54:20,842 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-27 19:54:20,843 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-27 19:54:20,843 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 19:54:20,843 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-27 19:54:20,843 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-11-27 19:54:20,843 INFO L87 Difference]: Start difference. First operand 44 states and 54 transitions. Second operand has 6 states, 5 states have (on average 6.2) internal successors, (31), 5 states have internal predecessors, (31), 3 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (7), 1 states have call predecessors, (7), 3 states have call successors, (7) [2024-11-27 19:54:20,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 19:54:20,966 INFO L93 Difference]: Finished difference Result 87 states and 113 transitions. [2024-11-27 19:54:20,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-27 19:54:20,967 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 6.2) internal successors, (31), 5 states have internal predecessors, (31), 3 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (7), 1 states have call predecessors, (7), 3 states have call successors, (7) Word has length 48 [2024-11-27 19:54:20,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 19:54:20,968 INFO L225 Difference]: With dead ends: 87 [2024-11-27 19:54:20,968 INFO L226 Difference]: Without dead ends: 46 [2024-11-27 19:54:20,968 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-11-27 19:54:20,969 INFO L435 NwaCegarLoop]: 43 mSDtfsCounter, 12 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 135 SdHoareTripleChecker+Invalid, 64 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-27 19:54:20,970 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 135 Invalid, 64 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 57 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-27 19:54:20,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2024-11-27 19:54:20,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2024-11-27 19:54:20,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 29 states have (on average 1.2413793103448276) internal successors, (36), 33 states have internal predecessors, (36), 8 states have call successors, (8), 4 states have call predecessors, (8), 8 states have return successors, (12), 8 states have call predecessors, (12), 8 states have call successors, (12) [2024-11-27 19:54:20,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 56 transitions. [2024-11-27 19:54:20,980 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 56 transitions. Word has length 48 [2024-11-27 19:54:20,980 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-27 19:54:20,980 INFO L471 AbstractCegarLoop]: Abstraction has 46 states and 56 transitions. [2024-11-27 19:54:20,980 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 6.2) internal successors, (31), 5 states have internal predecessors, (31), 3 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (7), 1 states have call predecessors, (7), 3 states have call successors, (7) [2024-11-27 19:54:20,980 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 56 transitions. [2024-11-27 19:54:20,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2024-11-27 19:54:20,981 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 19:54:20,982 INFO L218 NwaCegarLoop]: trace histogram [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] [2024-11-27 19:54:20,982 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-11-27 19:54:20,982 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-27 19:54:20,982 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 19:54:20,982 INFO L85 PathProgramCache]: Analyzing trace with hash 276627555, now seen corresponding path program 1 times [2024-11-27 19:54:20,982 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 19:54:20,983 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [868961920] [2024-11-27 19:54:20,983 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 19:54:20,983 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 19:54:21,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 19:54:21,783 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2024-11-27 19:54:21,784 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 19:54:21,784 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [868961920] [2024-11-27 19:54:21,784 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [868961920] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-27 19:54:21,784 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1203304854] [2024-11-27 19:54:21,784 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 19:54:21,784 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 19:54:21,785 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e815c5b8-bb3f-489e-8797-c12c12d6812b/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 19:54:21,787 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e815c5b8-bb3f-489e-8797-c12c12d6812b/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 19:54:21,790 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e815c5b8-bb3f-489e-8797-c12c12d6812b/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-27 19:54:21,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 19:54:21,963 INFO L256 TraceCheckSpWp]: Trace formula consists of 359 conjuncts, 26 conjuncts are in the unsatisfiable core [2024-11-27 19:54:21,971 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 19:54:22,011 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-27 19:54:22,300 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2024-11-27 19:54:22,300 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-27 19:54:23,023 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-27 19:54:23,023 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1203304854] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-27 19:54:23,023 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-27 19:54:23,023 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 10] total 23 [2024-11-27 19:54:23,024 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1146235935] [2024-11-27 19:54:23,024 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-27 19:54:23,024 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-11-27 19:54:23,024 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 19:54:23,025 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-11-27 19:54:23,026 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=404, Unknown=0, NotChecked=0, Total=506 [2024-11-27 19:54:23,026 INFO L87 Difference]: Start difference. First operand 46 states and 56 transitions. Second operand has 23 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 20 states have internal predecessors, (48), 9 states have call successors, (13), 4 states have call predecessors, (13), 7 states have return successors, (14), 9 states have call predecessors, (14), 9 states have call successors, (14) [2024-11-27 19:54:23,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 19:54:23,677 INFO L93 Difference]: Finished difference Result 62 states and 77 transitions. [2024-11-27 19:54:23,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-11-27 19:54:23,678 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 20 states have internal predecessors, (48), 9 states have call successors, (13), 4 states have call predecessors, (13), 7 states have return successors, (14), 9 states have call predecessors, (14), 9 states have call successors, (14) Word has length 53 [2024-11-27 19:54:23,678 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 19:54:23,679 INFO L225 Difference]: With dead ends: 62 [2024-11-27 19:54:23,680 INFO L226 Difference]: Without dead ends: 53 [2024-11-27 19:54:23,680 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 94 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 161 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=152, Invalid=550, Unknown=0, NotChecked=0, Total=702 [2024-11-27 19:54:23,685 INFO L435 NwaCegarLoop]: 15 mSDtfsCounter, 40 mSDsluCounter, 120 mSDsCounter, 0 mSdLazyCounter, 449 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 135 SdHoareTripleChecker+Invalid, 467 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 449 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-11-27 19:54:23,689 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [45 Valid, 135 Invalid, 467 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 449 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-11-27 19:54:23,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2024-11-27 19:54:23,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 52. [2024-11-27 19:54:23,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 36 states have internal predecessors, (40), 8 states have call successors, (8), 4 states have call predecessors, (8), 10 states have return successors, (15), 11 states have call predecessors, (15), 8 states have call successors, (15) [2024-11-27 19:54:23,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 63 transitions. [2024-11-27 19:54:23,709 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 63 transitions. Word has length 53 [2024-11-27 19:54:23,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-27 19:54:23,709 INFO L471 AbstractCegarLoop]: Abstraction has 52 states and 63 transitions. [2024-11-27 19:54:23,713 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 20 states have internal predecessors, (48), 9 states have call successors, (13), 4 states have call predecessors, (13), 7 states have return successors, (14), 9 states have call predecessors, (14), 9 states have call successors, (14) [2024-11-27 19:54:23,713 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 63 transitions. [2024-11-27 19:54:23,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2024-11-27 19:54:23,714 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 19:54:23,714 INFO L218 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 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] [2024-11-27 19:54:23,729 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e815c5b8-bb3f-489e-8797-c12c12d6812b/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-11-27 19:54:23,915 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e815c5b8-bb3f-489e-8797-c12c12d6812b/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 19:54:23,915 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-27 19:54:23,916 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 19:54:23,916 INFO L85 PathProgramCache]: Analyzing trace with hash -1179830148, now seen corresponding path program 1 times [2024-11-27 19:54:23,916 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 19:54:23,916 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1612736290] [2024-11-27 19:54:23,916 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 19:54:23,916 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 19:54:23,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 19:54:24,077 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 94 trivial. 0 not checked. [2024-11-27 19:54:24,078 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 19:54:24,078 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1612736290] [2024-11-27 19:54:24,078 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1612736290] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-27 19:54:24,078 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-27 19:54:24,078 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-27 19:54:24,079 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1549080287] [2024-11-27 19:54:24,079 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-27 19:54:24,079 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-27 19:54:24,079 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 19:54:24,080 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-27 19:54:24,080 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-27 19:54:24,080 INFO L87 Difference]: Start difference. First operand 52 states and 63 transitions. Second operand has 4 states, 4 states have (on average 7.25) internal successors, (29), 4 states have internal predecessors, (29), 1 states have call successors, (8), 1 states have call predecessors, (8), 1 states have return successors, (8), 1 states have call predecessors, (8), 1 states have call successors, (8) [2024-11-27 19:54:24,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 19:54:24,121 INFO L93 Difference]: Finished difference Result 60 states and 72 transitions. [2024-11-27 19:54:24,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-27 19:54:24,121 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.25) internal successors, (29), 4 states have internal predecessors, (29), 1 states have call successors, (8), 1 states have call predecessors, (8), 1 states have return successors, (8), 1 states have call predecessors, (8), 1 states have call successors, (8) Word has length 91 [2024-11-27 19:54:24,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 19:54:24,123 INFO L225 Difference]: With dead ends: 60 [2024-11-27 19:54:24,124 INFO L226 Difference]: Without dead ends: 55 [2024-11-27 19:54:24,125 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-27 19:54:24,126 INFO L435 NwaCegarLoop]: 45 mSDtfsCounter, 1 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 127 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-27 19:54:24,126 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 127 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-27 19:54:24,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2024-11-27 19:54:24,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 54. [2024-11-27 19:54:24,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 35 states have (on average 1.2) internal successors, (42), 38 states have internal predecessors, (42), 8 states have call successors, (8), 4 states have call predecessors, (8), 10 states have return successors, (15), 11 states have call predecessors, (15), 8 states have call successors, (15) [2024-11-27 19:54:24,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 65 transitions. [2024-11-27 19:54:24,143 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 65 transitions. Word has length 91 [2024-11-27 19:54:24,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-27 19:54:24,145 INFO L471 AbstractCegarLoop]: Abstraction has 54 states and 65 transitions. [2024-11-27 19:54:24,145 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.25) internal successors, (29), 4 states have internal predecessors, (29), 1 states have call successors, (8), 1 states have call predecessors, (8), 1 states have return successors, (8), 1 states have call predecessors, (8), 1 states have call successors, (8) [2024-11-27 19:54:24,145 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 65 transitions. [2024-11-27 19:54:24,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2024-11-27 19:54:24,146 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 19:54:24,146 INFO L218 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 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] [2024-11-27 19:54:24,147 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-11-27 19:54:24,147 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-27 19:54:24,147 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 19:54:24,150 INFO L85 PathProgramCache]: Analyzing trace with hash -1177983106, now seen corresponding path program 1 times [2024-11-27 19:54:24,150 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 19:54:24,150 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [767987133] [2024-11-27 19:54:24,150 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 19:54:24,151 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 19:54:24,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 19:54:24,931 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 8 proven. 35 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2024-11-27 19:54:24,932 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 19:54:24,932 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [767987133] [2024-11-27 19:54:24,932 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [767987133] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-27 19:54:24,932 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1160899391] [2024-11-27 19:54:24,932 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 19:54:24,933 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 19:54:24,934 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e815c5b8-bb3f-489e-8797-c12c12d6812b/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 19:54:24,936 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e815c5b8-bb3f-489e-8797-c12c12d6812b/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 19:54:24,940 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e815c5b8-bb3f-489e-8797-c12c12d6812b/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-27 19:54:25,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 19:54:25,144 INFO L256 TraceCheckSpWp]: Trace formula consists of 576 conjuncts, 27 conjuncts are in the unsatisfiable core [2024-11-27 19:54:25,150 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 19:54:25,167 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-11-27 19:54:25,347 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 56 proven. 3 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2024-11-27 19:54:25,348 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-27 19:54:26,684 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 40 proven. 4 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2024-11-27 19:54:26,686 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1160899391] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-27 19:54:26,686 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-27 19:54:26,686 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 10] total 22 [2024-11-27 19:54:26,687 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1864676966] [2024-11-27 19:54:26,687 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-27 19:54:26,687 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-11-27 19:54:26,690 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 19:54:26,691 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-11-27 19:54:26,691 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=369, Unknown=0, NotChecked=0, Total=462 [2024-11-27 19:54:26,691 INFO L87 Difference]: Start difference. First operand 54 states and 65 transitions. Second operand has 22 states, 16 states have (on average 3.8125) internal successors, (61), 19 states have internal predecessors, (61), 8 states have call successors, (20), 5 states have call predecessors, (20), 7 states have return successors, (23), 5 states have call predecessors, (23), 8 states have call successors, (23) [2024-11-27 19:54:27,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 19:54:27,064 INFO L93 Difference]: Finished difference Result 109 states and 140 transitions. [2024-11-27 19:54:27,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-27 19:54:27,065 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 16 states have (on average 3.8125) internal successors, (61), 19 states have internal predecessors, (61), 8 states have call successors, (20), 5 states have call predecessors, (20), 7 states have return successors, (23), 5 states have call predecessors, (23), 8 states have call successors, (23) Word has length 91 [2024-11-27 19:54:27,065 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 19:54:27,066 INFO L225 Difference]: With dead ends: 109 [2024-11-27 19:54:27,066 INFO L226 Difference]: Without dead ends: 58 [2024-11-27 19:54:27,067 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 195 GetRequests, 170 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 169 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=143, Invalid=559, Unknown=0, NotChecked=0, Total=702 [2024-11-27 19:54:27,068 INFO L435 NwaCegarLoop]: 44 mSDtfsCounter, 16 mSDsluCounter, 387 mSDsCounter, 0 mSdLazyCounter, 230 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 431 SdHoareTripleChecker+Invalid, 242 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 230 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-27 19:54:27,068 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 431 Invalid, 242 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 230 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-27 19:54:27,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2024-11-27 19:54:27,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2024-11-27 19:54:27,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 37 states have (on average 1.1891891891891893) internal successors, (44), 40 states have internal predecessors, (44), 8 states have call successors, (8), 4 states have call predecessors, (8), 12 states have return successors, (17), 13 states have call predecessors, (17), 8 states have call successors, (17) [2024-11-27 19:54:27,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 69 transitions. [2024-11-27 19:54:27,086 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 69 transitions. Word has length 91 [2024-11-27 19:54:27,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-27 19:54:27,086 INFO L471 AbstractCegarLoop]: Abstraction has 58 states and 69 transitions. [2024-11-27 19:54:27,086 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 16 states have (on average 3.8125) internal successors, (61), 19 states have internal predecessors, (61), 8 states have call successors, (20), 5 states have call predecessors, (20), 7 states have return successors, (23), 5 states have call predecessors, (23), 8 states have call successors, (23) [2024-11-27 19:54:27,086 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 69 transitions. [2024-11-27 19:54:27,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2024-11-27 19:54:27,087 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 19:54:27,088 INFO L218 NwaCegarLoop]: trace histogram [8, 8, 6, 6, 6, 4, 4, 4, 4, 3, 3, 2, 2, 2, 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] [2024-11-27 19:54:27,098 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e815c5b8-bb3f-489e-8797-c12c12d6812b/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-11-27 19:54:27,288 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e815c5b8-bb3f-489e-8797-c12c12d6812b/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 19:54:27,288 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-27 19:54:27,289 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 19:54:27,289 INFO L85 PathProgramCache]: Analyzing trace with hash -883636598, now seen corresponding path program 2 times [2024-11-27 19:54:27,289 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 19:54:27,289 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1702509928] [2024-11-27 19:54:27,289 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-27 19:54:27,289 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 19:54:27,349 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-27 19:54:27,349 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 19:54:27,996 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 34 proven. 3 refuted. 0 times theorem prover too weak. 159 trivial. 0 not checked. [2024-11-27 19:54:27,996 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 19:54:27,996 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1702509928] [2024-11-27 19:54:27,996 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1702509928] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-27 19:54:27,996 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [288004251] [2024-11-27 19:54:27,996 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-27 19:54:27,996 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 19:54:27,997 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e815c5b8-bb3f-489e-8797-c12c12d6812b/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 19:54:28,000 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e815c5b8-bb3f-489e-8797-c12c12d6812b/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 19:54:28,007 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e815c5b8-bb3f-489e-8797-c12c12d6812b/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-27 19:54:28,230 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-27 19:54:28,230 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 19:54:28,235 INFO L256 TraceCheckSpWp]: Trace formula consists of 652 conjuncts, 51 conjuncts are in the unsatisfiable core [2024-11-27 19:54:28,242 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 19:54:28,260 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-11-27 19:54:28,577 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 112 proven. 15 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2024-11-27 19:54:28,578 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-27 19:54:31,925 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 96 proven. 27 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2024-11-27 19:54:31,925 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [288004251] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-27 19:54:31,926 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-27 19:54:31,926 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11, 18] total 34 [2024-11-27 19:54:31,926 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [821588916] [2024-11-27 19:54:31,926 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-27 19:54:31,927 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2024-11-27 19:54:31,927 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 19:54:31,928 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2024-11-27 19:54:31,928 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=174, Invalid=948, Unknown=0, NotChecked=0, Total=1122 [2024-11-27 19:54:31,929 INFO L87 Difference]: Start difference. First operand 58 states and 69 transitions. Second operand has 34 states, 26 states have (on average 2.730769230769231) internal successors, (71), 28 states have internal predecessors, (71), 11 states have call successors, (23), 8 states have call predecessors, (23), 12 states have return successors, (27), 10 states have call predecessors, (27), 11 states have call successors, (27) [2024-11-27 19:54:32,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 19:54:32,708 INFO L93 Difference]: Finished difference Result 117 states and 148 transitions. [2024-11-27 19:54:32,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-11-27 19:54:32,709 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 26 states have (on average 2.730769230769231) internal successors, (71), 28 states have internal predecessors, (71), 11 states have call successors, (23), 8 states have call predecessors, (23), 12 states have return successors, (27), 10 states have call predecessors, (27), 11 states have call successors, (27) Word has length 111 [2024-11-27 19:54:32,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 19:54:32,710 INFO L225 Difference]: With dead ends: 117 [2024-11-27 19:54:32,710 INFO L226 Difference]: Without dead ends: 62 [2024-11-27 19:54:32,712 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 243 GetRequests, 198 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 459 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=324, Invalid=1838, Unknown=0, NotChecked=0, Total=2162 [2024-11-27 19:54:32,712 INFO L435 NwaCegarLoop]: 35 mSDtfsCounter, 46 mSDsluCounter, 405 mSDsCounter, 0 mSdLazyCounter, 457 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 440 SdHoareTripleChecker+Invalid, 487 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 457 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-27 19:54:32,713 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [46 Valid, 440 Invalid, 487 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 457 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-11-27 19:54:32,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2024-11-27 19:54:32,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 62. [2024-11-27 19:54:32,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 39 states have (on average 1.1794871794871795) internal successors, (46), 42 states have internal predecessors, (46), 8 states have call successors, (8), 4 states have call predecessors, (8), 14 states have return successors, (19), 15 states have call predecessors, (19), 8 states have call successors, (19) [2024-11-27 19:54:32,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 73 transitions. [2024-11-27 19:54:32,723 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 73 transitions. Word has length 111 [2024-11-27 19:54:32,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-27 19:54:32,723 INFO L471 AbstractCegarLoop]: Abstraction has 62 states and 73 transitions. [2024-11-27 19:54:32,723 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 26 states have (on average 2.730769230769231) internal successors, (71), 28 states have internal predecessors, (71), 11 states have call successors, (23), 8 states have call predecessors, (23), 12 states have return successors, (27), 10 states have call predecessors, (27), 11 states have call successors, (27) [2024-11-27 19:54:32,723 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 73 transitions. [2024-11-27 19:54:32,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 184 [2024-11-27 19:54:32,725 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 19:54:32,725 INFO L218 NwaCegarLoop]: trace histogram [20, 20, 16, 16, 16, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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] [2024-11-27 19:54:32,735 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e815c5b8-bb3f-489e-8797-c12c12d6812b/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-11-27 19:54:32,929 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e815c5b8-bb3f-489e-8797-c12c12d6812b/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 19:54:32,930 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-27 19:54:32,930 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 19:54:32,930 INFO L85 PathProgramCache]: Analyzing trace with hash 373213534, now seen corresponding path program 3 times [2024-11-27 19:54:32,930 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 19:54:32,930 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1359903187] [2024-11-27 19:54:32,930 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-27 19:54:32,931 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 19:54:32,977 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-11-27 19:54:32,977 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 19:54:33,490 INFO L134 CoverageAnalysis]: Checked inductivity of 1000 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 988 trivial. 0 not checked. [2024-11-27 19:54:33,491 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 19:54:33,491 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1359903187] [2024-11-27 19:54:33,491 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1359903187] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-27 19:54:33,491 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [227629640] [2024-11-27 19:54:33,491 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-27 19:54:33,491 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 19:54:33,492 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e815c5b8-bb3f-489e-8797-c12c12d6812b/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 19:54:33,493 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e815c5b8-bb3f-489e-8797-c12c12d6812b/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 19:54:33,496 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e815c5b8-bb3f-489e-8797-c12c12d6812b/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-27 19:54:33,686 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-11-27 19:54:33,686 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 19:54:33,689 INFO L256 TraceCheckSpWp]: Trace formula consists of 374 conjuncts, 48 conjuncts are in the unsatisfiable core [2024-11-27 19:54:33,695 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 19:54:34,164 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2024-11-27 19:54:34,319 INFO L134 CoverageAnalysis]: Checked inductivity of 1000 backedges. 533 proven. 10 refuted. 0 times theorem prover too weak. 457 trivial. 0 not checked. [2024-11-27 19:54:34,319 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-27 19:54:35,041 INFO L349 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2024-11-27 19:54:35,042 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 25 [2024-11-27 19:54:52,139 INFO L134 CoverageAnalysis]: Checked inductivity of 1000 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 988 trivial. 0 not checked. [2024-11-27 19:54:52,139 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [227629640] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-27 19:54:52,139 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-27 19:54:52,139 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14, 12] total 31 [2024-11-27 19:54:52,140 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [519211824] [2024-11-27 19:54:52,140 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-27 19:54:52,140 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2024-11-27 19:54:52,141 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 19:54:52,141 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2024-11-27 19:54:52,142 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=820, Unknown=4, NotChecked=0, Total=930 [2024-11-27 19:54:52,143 INFO L87 Difference]: Start difference. First operand 62 states and 73 transitions. Second operand has 31 states, 25 states have (on average 2.88) internal successors, (72), 27 states have internal predecessors, (72), 14 states have call successors, (25), 4 states have call predecessors, (25), 7 states have return successors, (25), 14 states have call predecessors, (25), 14 states have call successors, (25) [2024-11-27 19:54:53,175 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 19:54:53,175 INFO L93 Difference]: Finished difference Result 71 states and 82 transitions. [2024-11-27 19:54:53,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-11-27 19:54:53,176 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 25 states have (on average 2.88) internal successors, (72), 27 states have internal predecessors, (72), 14 states have call successors, (25), 4 states have call predecessors, (25), 7 states have return successors, (25), 14 states have call predecessors, (25), 14 states have call successors, (25) Word has length 183 [2024-11-27 19:54:53,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 19:54:53,178 INFO L225 Difference]: With dead ends: 71 [2024-11-27 19:54:53,178 INFO L226 Difference]: Without dead ends: 60 [2024-11-27 19:54:53,179 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 391 GetRequests, 349 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 362 ImplicationChecksByTransitivity, 17.1s TimeCoverageRelationStatistics Valid=246, Invalid=1556, Unknown=4, NotChecked=0, Total=1806 [2024-11-27 19:54:53,181 INFO L435 NwaCegarLoop]: 15 mSDtfsCounter, 38 mSDsluCounter, 187 mSDsCounter, 0 mSdLazyCounter, 634 mSolverCounterSat, 24 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 202 SdHoareTripleChecker+Invalid, 660 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 634 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-11-27 19:54:53,182 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [38 Valid, 202 Invalid, 660 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 634 Invalid, 2 Unknown, 0 Unchecked, 0.6s Time] [2024-11-27 19:54:53,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2024-11-27 19:54:53,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2024-11-27 19:54:53,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 37 states have (on average 1.162162162162162) internal successors, (43), 40 states have internal predecessors, (43), 8 states have call successors, (8), 5 states have call predecessors, (8), 14 states have return successors, (18), 14 states have call predecessors, (18), 8 states have call successors, (18) [2024-11-27 19:54:53,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 69 transitions. [2024-11-27 19:54:53,204 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 69 transitions. Word has length 183 [2024-11-27 19:54:53,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-27 19:54:53,206 INFO L471 AbstractCegarLoop]: Abstraction has 60 states and 69 transitions. [2024-11-27 19:54:53,207 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 25 states have (on average 2.88) internal successors, (72), 27 states have internal predecessors, (72), 14 states have call successors, (25), 4 states have call predecessors, (25), 7 states have return successors, (25), 14 states have call predecessors, (25), 14 states have call successors, (25) [2024-11-27 19:54:53,207 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 69 transitions. [2024-11-27 19:54:53,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 268 [2024-11-27 19:54:53,233 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 19:54:53,233 INFO L218 NwaCegarLoop]: trace histogram [30, 30, 24, 24, 24, 9, 9, 6, 6, 6, 6, 6, 6, 6, 6, 6, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 19:54:53,245 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e815c5b8-bb3f-489e-8797-c12c12d6812b/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-11-27 19:54:53,433 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e815c5b8-bb3f-489e-8797-c12c12d6812b/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2024-11-27 19:54:53,434 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-27 19:54:53,434 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 19:54:53,434 INFO L85 PathProgramCache]: Analyzing trace with hash 1910654145, now seen corresponding path program 2 times [2024-11-27 19:54:53,435 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 19:54:53,435 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [8883646] [2024-11-27 19:54:53,435 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-27 19:54:53,435 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 19:54:53,519 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-27 19:54:53,519 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 19:54:56,293 INFO L134 CoverageAnalysis]: Checked inductivity of 2307 backedges. 18 proven. 647 refuted. 0 times theorem prover too weak. 1642 trivial. 0 not checked. [2024-11-27 19:54:56,294 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 19:54:56,294 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [8883646] [2024-11-27 19:54:56,294 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [8883646] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-27 19:54:56,294 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [330231474] [2024-11-27 19:54:56,295 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-27 19:54:56,295 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 19:54:56,295 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e815c5b8-bb3f-489e-8797-c12c12d6812b/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 19:54:56,297 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e815c5b8-bb3f-489e-8797-c12c12d6812b/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 19:54:56,298 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e815c5b8-bb3f-489e-8797-c12c12d6812b/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-27 19:54:56,699 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-27 19:54:56,700 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 19:54:56,712 INFO L256 TraceCheckSpWp]: Trace formula consists of 1348 conjuncts, 63 conjuncts are in the unsatisfiable core [2024-11-27 19:54:56,722 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 19:54:56,733 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-11-27 19:54:57,065 INFO L134 CoverageAnalysis]: Checked inductivity of 2307 backedges. 621 proven. 24 refuted. 0 times theorem prover too weak. 1662 trivial. 0 not checked. [2024-11-27 19:54:57,066 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-27 19:55:00,776 INFO L134 CoverageAnalysis]: Checked inductivity of 2307 backedges. 12 proven. 669 refuted. 0 times theorem prover too weak. 1626 trivial. 0 not checked. [2024-11-27 19:55:00,777 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [330231474] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-27 19:55:00,777 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-27 19:55:00,778 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 22] total 39 [2024-11-27 19:55:00,778 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1533222691] [2024-11-27 19:55:00,778 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-27 19:55:00,780 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2024-11-27 19:55:00,783 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 19:55:00,784 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2024-11-27 19:55:00,784 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=287, Invalid=1195, Unknown=0, NotChecked=0, Total=1482 [2024-11-27 19:55:00,785 INFO L87 Difference]: Start difference. First operand 60 states and 69 transitions. Second operand has 39 states, 29 states have (on average 2.8275862068965516) internal successors, (82), 33 states have internal predecessors, (82), 12 states have call successors, (28), 8 states have call predecessors, (28), 13 states have return successors, (35), 11 states have call predecessors, (35), 12 states have call successors, (35) [2024-11-27 19:55:01,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 19:55:01,294 INFO L93 Difference]: Finished difference Result 119 states and 147 transitions. [2024-11-27 19:55:01,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-11-27 19:55:01,295 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 29 states have (on average 2.8275862068965516) internal successors, (82), 33 states have internal predecessors, (82), 12 states have call successors, (28), 8 states have call predecessors, (28), 13 states have return successors, (35), 11 states have call predecessors, (35), 12 states have call successors, (35) Word has length 267 [2024-11-27 19:55:01,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 19:55:01,296 INFO L225 Difference]: With dead ends: 119 [2024-11-27 19:55:01,296 INFO L226 Difference]: Without dead ends: 64 [2024-11-27 19:55:01,297 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 561 GetRequests, 514 SyntacticMatches, 3 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 807 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=395, Invalid=1675, Unknown=0, NotChecked=0, Total=2070 [2024-11-27 19:55:01,298 INFO L435 NwaCegarLoop]: 46 mSDtfsCounter, 57 mSDsluCounter, 462 mSDsCounter, 0 mSdLazyCounter, 306 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 508 SdHoareTripleChecker+Invalid, 343 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 306 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-27 19:55:01,298 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [57 Valid, 508 Invalid, 343 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 306 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-27 19:55:01,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2024-11-27 19:55:01,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 64. [2024-11-27 19:55:01,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 39 states have (on average 1.1538461538461537) internal successors, (45), 42 states have internal predecessors, (45), 8 states have call successors, (8), 5 states have call predecessors, (8), 16 states have return successors, (20), 16 states have call predecessors, (20), 8 states have call successors, (20) [2024-11-27 19:55:01,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 73 transitions. [2024-11-27 19:55:01,316 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 73 transitions. Word has length 267 [2024-11-27 19:55:01,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-27 19:55:01,316 INFO L471 AbstractCegarLoop]: Abstraction has 64 states and 73 transitions. [2024-11-27 19:55:01,316 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 29 states have (on average 2.8275862068965516) internal successors, (82), 33 states have internal predecessors, (82), 12 states have call successors, (28), 8 states have call predecessors, (28), 13 states have return successors, (35), 11 states have call predecessors, (35), 12 states have call successors, (35) [2024-11-27 19:55:01,316 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 73 transitions. [2024-11-27 19:55:01,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 328 [2024-11-27 19:55:01,321 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 19:55:01,322 INFO L218 NwaCegarLoop]: trace histogram [42, 42, 36, 36, 36, 9, 9, 6, 6, 6, 6, 6, 6, 6, 6, 6, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 19:55:01,334 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e815c5b8-bb3f-489e-8797-c12c12d6812b/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-11-27 19:55:01,526 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e815c5b8-bb3f-489e-8797-c12c12d6812b/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 19:55:01,526 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-27 19:55:01,526 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 19:55:01,526 INFO L85 PathProgramCache]: Analyzing trace with hash 617426369, now seen corresponding path program 3 times [2024-11-27 19:55:01,527 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 19:55:01,527 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [357305123] [2024-11-27 19:55:01,527 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-27 19:55:01,527 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 19:55:01,574 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-11-27 19:55:01,574 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 19:55:01,951 INFO L134 CoverageAnalysis]: Checked inductivity of 4365 backedges. 50 proven. 3 refuted. 0 times theorem prover too weak. 4312 trivial. 0 not checked. [2024-11-27 19:55:01,951 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 19:55:01,952 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [357305123] [2024-11-27 19:55:01,952 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [357305123] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-27 19:55:01,952 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1983091151] [2024-11-27 19:55:01,952 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-27 19:55:01,952 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 19:55:01,952 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e815c5b8-bb3f-489e-8797-c12c12d6812b/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 19:55:01,954 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e815c5b8-bb3f-489e-8797-c12c12d6812b/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 19:55:01,958 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e815c5b8-bb3f-489e-8797-c12c12d6812b/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-27 19:55:02,260 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-11-27 19:55:02,260 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 19:55:02,267 INFO L256 TraceCheckSpWp]: Trace formula consists of 380 conjuncts, 33 conjuncts are in the unsatisfiable core [2024-11-27 19:55:02,277 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 19:55:02,310 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-27 19:55:02,503 INFO L134 CoverageAnalysis]: Checked inductivity of 4365 backedges. 52 proven. 3 refuted. 0 times theorem prover too weak. 4310 trivial. 0 not checked. [2024-11-27 19:55:02,503 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-27 19:55:04,724 INFO L134 CoverageAnalysis]: Checked inductivity of 4365 backedges. 50 proven. 4 refuted. 0 times theorem prover too weak. 4311 trivial. 0 not checked. [2024-11-27 19:55:04,724 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1983091151] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-27 19:55:04,724 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-27 19:55:04,724 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 24 [2024-11-27 19:55:04,724 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [777993272] [2024-11-27 19:55:04,724 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-27 19:55:04,725 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-11-27 19:55:04,725 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 19:55:04,726 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-11-27 19:55:04,726 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=447, Unknown=0, NotChecked=0, Total=552 [2024-11-27 19:55:04,727 INFO L87 Difference]: Start difference. First operand 64 states and 73 transitions. Second operand has 24 states, 18 states have (on average 3.1666666666666665) internal successors, (57), 21 states have internal predecessors, (57), 11 states have call successors, (19), 5 states have call predecessors, (19), 7 states have return successors, (19), 8 states have call predecessors, (19), 11 states have call successors, (19) [2024-11-27 19:55:05,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 19:55:05,106 INFO L93 Difference]: Finished difference Result 127 states and 150 transitions. [2024-11-27 19:55:05,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-11-27 19:55:05,107 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 18 states have (on average 3.1666666666666665) internal successors, (57), 21 states have internal predecessors, (57), 11 states have call successors, (19), 5 states have call predecessors, (19), 7 states have return successors, (19), 8 states have call predecessors, (19), 11 states have call successors, (19) Word has length 327 [2024-11-27 19:55:05,108 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 19:55:05,108 INFO L225 Difference]: With dead ends: 127 [2024-11-27 19:55:05,109 INFO L226 Difference]: Without dead ends: 68 [2024-11-27 19:55:05,109 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 669 GetRequests, 641 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 215 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=168, Invalid=702, Unknown=0, NotChecked=0, Total=870 [2024-11-27 19:55:05,110 INFO L435 NwaCegarLoop]: 23 mSDtfsCounter, 28 mSDsluCounter, 172 mSDsCounter, 0 mSdLazyCounter, 302 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 195 SdHoareTripleChecker+Invalid, 312 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 302 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-27 19:55:05,110 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [33 Valid, 195 Invalid, 312 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 302 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-27 19:55:05,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2024-11-27 19:55:05,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 68. [2024-11-27 19:55:05,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 41 states have (on average 1.146341463414634) internal successors, (47), 44 states have internal predecessors, (47), 8 states have call successors, (8), 5 states have call predecessors, (8), 18 states have return successors, (22), 18 states have call predecessors, (22), 8 states have call successors, (22) [2024-11-27 19:55:05,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 77 transitions. [2024-11-27 19:55:05,123 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 77 transitions. Word has length 327 [2024-11-27 19:55:05,123 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-27 19:55:05,123 INFO L471 AbstractCegarLoop]: Abstraction has 68 states and 77 transitions. [2024-11-27 19:55:05,123 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 18 states have (on average 3.1666666666666665) internal successors, (57), 21 states have internal predecessors, (57), 11 states have call successors, (19), 5 states have call predecessors, (19), 7 states have return successors, (19), 8 states have call predecessors, (19), 11 states have call successors, (19) [2024-11-27 19:55:05,124 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 77 transitions. [2024-11-27 19:55:05,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 886 [2024-11-27 19:55:05,153 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 19:55:05,153 INFO L218 NwaCegarLoop]: trace histogram [126, 126, 108, 108, 108, 27, 27, 18, 18, 18, 18, 18, 18, 18, 12, 12, 9, 9, 9, 9, 9, 9, 9, 4, 4, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 19:55:05,165 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e815c5b8-bb3f-489e-8797-c12c12d6812b/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-11-27 19:55:05,354 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e815c5b8-bb3f-489e-8797-c12c12d6812b/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 19:55:05,354 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-27 19:55:05,355 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 19:55:05,355 INFO L85 PathProgramCache]: Analyzing trace with hash -1491611737, now seen corresponding path program 4 times [2024-11-27 19:55:05,355 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 19:55:05,355 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1013163200] [2024-11-27 19:55:05,355 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-27 19:55:05,355 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 19:55:05,604 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-27 19:55:05,604 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 19:55:10,855 INFO L134 CoverageAnalysis]: Checked inductivity of 39546 backedges. 69 proven. 401 refuted. 0 times theorem prover too weak. 39076 trivial. 0 not checked. [2024-11-27 19:55:10,855 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 19:55:10,855 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1013163200] [2024-11-27 19:55:10,856 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1013163200] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-27 19:55:10,856 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1298085478] [2024-11-27 19:55:10,856 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-27 19:55:10,856 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 19:55:10,856 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e815c5b8-bb3f-489e-8797-c12c12d6812b/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 19:55:10,860 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e815c5b8-bb3f-489e-8797-c12c12d6812b/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 19:55:10,867 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e815c5b8-bb3f-489e-8797-c12c12d6812b/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-27 19:55:11,783 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-27 19:55:11,783 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 19:55:11,800 INFO L256 TraceCheckSpWp]: Trace formula consists of 3909 conjuncts, 41 conjuncts are in the unsatisfiable core [2024-11-27 19:55:11,821 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 19:55:11,858 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-11-27 19:55:12,096 INFO L134 CoverageAnalysis]: Checked inductivity of 39546 backedges. 504 proven. 8 refuted. 0 times theorem prover too weak. 39034 trivial. 0 not checked. [2024-11-27 19:55:12,097 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-27 19:55:18,710 INFO L134 CoverageAnalysis]: Checked inductivity of 39546 backedges. 472 proven. 15 refuted. 0 times theorem prover too weak. 39059 trivial. 0 not checked. [2024-11-27 19:55:18,710 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1298085478] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-27 19:55:18,710 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-27 19:55:18,711 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10, 14] total 28 [2024-11-27 19:55:18,711 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1802795377] [2024-11-27 19:55:18,711 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-27 19:55:18,713 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2024-11-27 19:55:18,713 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 19:55:18,714 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2024-11-27 19:55:18,714 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=150, Invalid=606, Unknown=0, NotChecked=0, Total=756 [2024-11-27 19:55:18,714 INFO L87 Difference]: Start difference. First operand 68 states and 77 transitions. Second operand has 28 states, 20 states have (on average 3.3) internal successors, (66), 24 states have internal predecessors, (66), 14 states have call successors, (24), 6 states have call predecessors, (24), 9 states have return successors, (28), 11 states have call predecessors, (28), 14 states have call successors, (28) [2024-11-27 19:55:19,199 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 19:55:19,199 INFO L93 Difference]: Finished difference Result 135 states and 162 transitions. [2024-11-27 19:55:19,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-11-27 19:55:19,200 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 20 states have (on average 3.3) internal successors, (66), 24 states have internal predecessors, (66), 14 states have call successors, (24), 6 states have call predecessors, (24), 9 states have return successors, (28), 11 states have call predecessors, (28), 14 states have call successors, (28) Word has length 885 [2024-11-27 19:55:19,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 19:55:19,202 INFO L225 Difference]: With dead ends: 135 [2024-11-27 19:55:19,203 INFO L226 Difference]: Without dead ends: 72 [2024-11-27 19:55:19,204 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 1788 GetRequests, 1755 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 360 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=234, Invalid=888, Unknown=0, NotChecked=0, Total=1122 [2024-11-27 19:55:19,204 INFO L435 NwaCegarLoop]: 34 mSDtfsCounter, 20 mSDsluCounter, 323 mSDsCounter, 0 mSdLazyCounter, 302 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 357 SdHoareTripleChecker+Invalid, 315 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 302 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-27 19:55:19,204 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 357 Invalid, 315 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 302 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-27 19:55:19,205 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2024-11-27 19:55:19,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 72. [2024-11-27 19:55:19,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 43 states have (on average 1.1395348837209303) internal successors, (49), 46 states have internal predecessors, (49), 8 states have call successors, (8), 5 states have call predecessors, (8), 20 states have return successors, (24), 20 states have call predecessors, (24), 8 states have call successors, (24) [2024-11-27 19:55:19,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 81 transitions. [2024-11-27 19:55:19,233 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 81 transitions. Word has length 885 [2024-11-27 19:55:19,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-27 19:55:19,233 INFO L471 AbstractCegarLoop]: Abstraction has 72 states and 81 transitions. [2024-11-27 19:55:19,234 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 20 states have (on average 3.3) internal successors, (66), 24 states have internal predecessors, (66), 14 states have call successors, (24), 6 states have call predecessors, (24), 9 states have return successors, (28), 11 states have call predecessors, (28), 14 states have call successors, (28) [2024-11-27 19:55:19,234 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 81 transitions. [2024-11-27 19:55:19,259 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1624 [2024-11-27 19:55:19,259 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 19:55:19,259 INFO L218 NwaCegarLoop]: trace histogram [252, 252, 216, 216, 216, 45, 45, 36, 36, 36, 36, 36, 36, 36, 12, 12, 9, 9, 9, 9, 9, 9, 9, 4, 4, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 19:55:19,279 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e815c5b8-bb3f-489e-8797-c12c12d6812b/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2024-11-27 19:55:19,460 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e815c5b8-bb3f-489e-8797-c12c12d6812b/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 19:55:19,461 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-27 19:55:19,461 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 19:55:19,462 INFO L85 PathProgramCache]: Analyzing trace with hash 1352699063, now seen corresponding path program 5 times [2024-11-27 19:55:19,462 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 19:55:19,462 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [38358932] [2024-11-27 19:55:19,462 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-27 19:55:19,462 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 19:55:22,366 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 21 check-sat command(s) [2024-11-27 19:55:22,366 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 19:55:37,245 INFO L134 CoverageAnalysis]: Checked inductivity of 155979 backedges. 177 proven. 1117 refuted. 0 times theorem prover too weak. 154685 trivial. 0 not checked. [2024-11-27 19:55:37,245 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 19:55:37,245 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [38358932] [2024-11-27 19:55:37,246 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [38358932] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-27 19:55:37,246 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1215366434] [2024-11-27 19:55:37,246 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-27 19:55:37,246 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 19:55:37,246 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e815c5b8-bb3f-489e-8797-c12c12d6812b/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 19:55:37,248 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e815c5b8-bb3f-489e-8797-c12c12d6812b/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 19:55:37,251 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e815c5b8-bb3f-489e-8797-c12c12d6812b/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process