./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/recursified_loop-simple/recursified_nested_3.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_5dab80af-618f-475b-9864-969976b18a30/bin/uautomizer-verify-aQ6SnzHsRB/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dab80af-618f-475b-9864-969976b18a30/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_5dab80af-618f-475b-9864-969976b18a30/bin/uautomizer-verify-aQ6SnzHsRB/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dab80af-618f-475b-9864-969976b18a30/bin/uautomizer-verify-aQ6SnzHsRB/config/AutomizerReach.xml -i ../../sv-benchmarks/c/recursified_loop-simple/recursified_nested_3.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dab80af-618f-475b-9864-969976b18a30/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_5dab80af-618f-475b-9864-969976b18a30/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 9a8e2b8a66923dd7d46d9db92fbd8b38c75eb8108da5237ec87b15cd1ae67985 --- Real Ultimate output --- This is Ultimate 0.3.0-dev-d790fec [2024-11-27 19:51:11,766 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-27 19:51:11,880 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dab80af-618f-475b-9864-969976b18a30/bin/uautomizer-verify-aQ6SnzHsRB/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-11-27 19:51:11,887 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-27 19:51:11,891 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-27 19:51:11,930 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-27 19:51:11,931 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-27 19:51:11,932 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-27 19:51:11,932 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-27 19:51:11,933 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-27 19:51:11,933 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-27 19:51:11,934 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-27 19:51:11,935 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-27 19:51:11,935 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-27 19:51:11,935 INFO L153 SettingsManager]: * Use SBE=true [2024-11-27 19:51:11,935 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-27 19:51:11,935 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-27 19:51:11,935 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-27 19:51:11,936 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-27 19:51:11,936 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-27 19:51:11,936 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-27 19:51:11,936 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-27 19:51:11,936 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-27 19:51:11,936 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-27 19:51:11,936 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-27 19:51:11,936 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-27 19:51:11,936 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2024-11-27 19:51:11,936 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-27 19:51:11,936 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2024-11-27 19:51:11,936 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-27 19:51:11,937 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-27 19:51:11,937 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-27 19:51:11,937 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-27 19:51:11,937 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-27 19:51:11,937 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-27 19:51:11,937 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-27 19:51:11,937 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-27 19:51:11,937 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-27 19:51:11,937 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-27 19:51:11,938 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-27 19:51:11,939 INFO L153 SettingsManager]: * Compute procedure contracts=false [2024-11-27 19:51:11,939 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-27 19:51:11,939 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-27 19:51:11,939 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-27 19:51:11,939 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-27 19:51:11,940 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-27 19:51:11,940 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-27 19:51:11,940 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-27 19:51:11,940 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_5dab80af-618f-475b-9864-969976b18a30/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 -> 9a8e2b8a66923dd7d46d9db92fbd8b38c75eb8108da5237ec87b15cd1ae67985 [2024-11-27 19:51:12,306 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-27 19:51:12,319 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-27 19:51:12,323 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-27 19:51:12,324 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-27 19:51:12,324 INFO L274 PluginConnector]: CDTParser initialized [2024-11-27 19:51:12,327 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dab80af-618f-475b-9864-969976b18a30/bin/uautomizer-verify-aQ6SnzHsRB/../../sv-benchmarks/c/recursified_loop-simple/recursified_nested_3.c [2024-11-27 19:51:15,505 INFO L533 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dab80af-618f-475b-9864-969976b18a30/bin/uautomizer-verify-aQ6SnzHsRB/data/1ba0490d8/3c950119dc284710aa1b211a1458686c/FLAG36729267b [2024-11-27 19:51:15,770 INFO L384 CDTParser]: Found 1 translation units. [2024-11-27 19:51:15,771 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dab80af-618f-475b-9864-969976b18a30/sv-benchmarks/c/recursified_loop-simple/recursified_nested_3.c [2024-11-27 19:51:15,777 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dab80af-618f-475b-9864-969976b18a30/bin/uautomizer-verify-aQ6SnzHsRB/data/1ba0490d8/3c950119dc284710aa1b211a1458686c/FLAG36729267b [2024-11-27 19:51:15,792 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dab80af-618f-475b-9864-969976b18a30/bin/uautomizer-verify-aQ6SnzHsRB/data/1ba0490d8/3c950119dc284710aa1b211a1458686c [2024-11-27 19:51:15,794 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-27 19:51:15,796 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-27 19:51:15,797 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-27 19:51:15,797 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-27 19:51:15,802 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-27 19:51:15,803 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.11 07:51:15" (1/1) ... [2024-11-27 19:51:15,804 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@408514dc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 07:51:15, skipping insertion in model container [2024-11-27 19:51:15,804 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.11 07:51:15" (1/1) ... [2024-11-27 19:51:15,824 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-27 19:51:16,001 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_5dab80af-618f-475b-9864-969976b18a30/sv-benchmarks/c/recursified_loop-simple/recursified_nested_3.c[1963,1976] [2024-11-27 19:51:16,009 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-27 19:51:16,018 INFO L200 MainTranslator]: Completed pre-run [2024-11-27 19:51:16,036 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_5dab80af-618f-475b-9864-969976b18a30/sv-benchmarks/c/recursified_loop-simple/recursified_nested_3.c[1963,1976] [2024-11-27 19:51:16,036 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-27 19:51:16,051 INFO L204 MainTranslator]: Completed translation [2024-11-27 19:51:16,051 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 07:51:16 WrapperNode [2024-11-27 19:51:16,051 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-27 19:51:16,053 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-27 19:51:16,053 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-27 19:51:16,053 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-27 19:51:16,065 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 07:51:16" (1/1) ... [2024-11-27 19:51:16,072 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 07:51:16" (1/1) ... [2024-11-27 19:51:16,096 INFO L138 Inliner]: procedures = 14, calls = 40, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 52 [2024-11-27 19:51:16,097 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-27 19:51:16,098 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-27 19:51:16,099 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-27 19:51:16,099 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-27 19:51:16,110 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 07:51:16" (1/1) ... [2024-11-27 19:51:16,111 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 07:51:16" (1/1) ... [2024-11-27 19:51:16,113 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 07:51:16" (1/1) ... [2024-11-27 19:51:16,135 INFO L175 MemorySlicer]: Split 20 memory accesses to 4 slices as follows [2, 6, 6, 6]. 30 percent of accesses are in the largest equivalence class. The 5 initializations are split as follows [2, 1, 1, 1]. The 6 writes are split as follows [0, 2, 2, 2]. [2024-11-27 19:51:16,135 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 07:51:16" (1/1) ... [2024-11-27 19:51:16,136 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 07:51:16" (1/1) ... [2024-11-27 19:51:16,143 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 07:51:16" (1/1) ... [2024-11-27 19:51:16,144 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 07:51:16" (1/1) ... [2024-11-27 19:51:16,146 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 07:51:16" (1/1) ... [2024-11-27 19:51:16,148 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 07:51:16" (1/1) ... [2024-11-27 19:51:16,149 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 07:51:16" (1/1) ... [2024-11-27 19:51:16,151 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-27 19:51:16,151 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-27 19:51:16,152 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-27 19:51:16,152 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-27 19:51:16,153 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 07:51:16" (1/1) ... [2024-11-27 19:51:16,160 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-27 19:51:16,179 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dab80af-618f-475b-9864-969976b18a30/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 19:51:16,197 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dab80af-618f-475b-9864-969976b18a30/bin/uautomizer-verify-aQ6SnzHsRB/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-11-27 19:51:16,203 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dab80af-618f-475b-9864-969976b18a30/bin/uautomizer-verify-aQ6SnzHsRB/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-11-27 19:51:16,237 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-27 19:51:16,237 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-27 19:51:16,237 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-11-27 19:51:16,238 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-11-27 19:51:16,238 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2024-11-27 19:51:16,238 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-11-27 19:51:16,238 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-11-27 19:51:16,238 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-11-27 19:51:16,238 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-11-27 19:51:16,238 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2024-11-27 19:51:16,238 INFO L130 BoogieDeclarations]: Found specification of procedure func_to_recursive_line_23_to_23_0 [2024-11-27 19:51:16,239 INFO L138 BoogieDeclarations]: Found implementation of procedure func_to_recursive_line_23_to_23_0 [2024-11-27 19:51:16,239 INFO L130 BoogieDeclarations]: Found specification of procedure func_to_recursive_line_22_to_23_0 [2024-11-27 19:51:16,239 INFO L138 BoogieDeclarations]: Found implementation of procedure func_to_recursive_line_22_to_23_0 [2024-11-27 19:51:16,240 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-27 19:51:16,240 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-27 19:51:16,240 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-11-27 19:51:16,240 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-11-27 19:51:16,240 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-11-27 19:51:16,240 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2024-11-27 19:51:16,240 INFO L130 BoogieDeclarations]: Found specification of procedure func_to_recursive_line_21_to_22_0 [2024-11-27 19:51:16,241 INFO L138 BoogieDeclarations]: Found implementation of procedure func_to_recursive_line_21_to_22_0 [2024-11-27 19:51:16,241 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-11-27 19:51:16,362 INFO L234 CfgBuilder]: Building ICFG [2024-11-27 19:51:16,364 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-27 19:51:16,601 INFO L? ?]: Removed 9 outVars from TransFormulas that were not future-live. [2024-11-27 19:51:16,601 INFO L283 CfgBuilder]: Performing block encoding [2024-11-27 19:51:16,620 INFO L307 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-27 19:51:16,622 INFO L312 CfgBuilder]: Removed 0 assume(true) statements. [2024-11-27 19:51:16,623 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.11 07:51:16 BoogieIcfgContainer [2024-11-27 19:51:16,623 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-27 19:51:16,626 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-27 19:51:16,626 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-27 19:51:16,635 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-27 19:51:16,635 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.11 07:51:15" (1/3) ... [2024-11-27 19:51:16,636 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@67c9019a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.11 07:51:16, skipping insertion in model container [2024-11-27 19:51:16,636 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 07:51:16" (2/3) ... [2024-11-27 19:51:16,636 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@67c9019a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.11 07:51:16, skipping insertion in model container [2024-11-27 19:51:16,636 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.11 07:51:16" (3/3) ... [2024-11-27 19:51:16,638 INFO L128 eAbstractionObserver]: Analyzing ICFG recursified_nested_3.c [2024-11-27 19:51:16,658 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-27 19:51:16,661 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG recursified_nested_3.c that has 4 procedures, 33 locations, 1 initial locations, 0 loop locations, and 1 error locations. [2024-11-27 19:51:16,742 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-27 19:51:16,760 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;@738fe5ad, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-27 19:51:16,760 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-11-27 19:51:16,766 INFO L276 IsEmpty]: Start isEmpty. Operand has 33 states, 22 states have (on average 1.3181818181818181) internal successors, (29), 26 states have internal predecessors, (29), 6 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2024-11-27 19:51:16,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2024-11-27 19:51:16,776 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 19:51:16,778 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 19:51:16,778 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-27 19:51:16,787 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 19:51:16,787 INFO L85 PathProgramCache]: Analyzing trace with hash 58732503, now seen corresponding path program 1 times [2024-11-27 19:51:16,796 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 19:51:16,797 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1908386654] [2024-11-27 19:51:16,797 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 19:51:16,799 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 19:51:16,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 19:51:17,561 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 19:51:17,562 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 19:51:17,565 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1908386654] [2024-11-27 19:51:17,566 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1908386654] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-27 19:51:17,566 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-27 19:51:17,567 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-11-27 19:51:17,568 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [114561843] [2024-11-27 19:51:17,569 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-27 19:51:17,574 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-27 19:51:17,575 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 19:51:17,599 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-27 19:51:17,599 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-11-27 19:51:17,601 INFO L87 Difference]: Start difference. First operand has 33 states, 22 states have (on average 1.3181818181818181) internal successors, (29), 26 states have internal predecessors, (29), 6 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Second operand has 6 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 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 19:51:17,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 19:51:17,837 INFO L93 Difference]: Finished difference Result 46 states and 57 transitions. [2024-11-27 19:51:17,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-27 19:51:17,841 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 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 13 [2024-11-27 19:51:17,841 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 19:51:17,848 INFO L225 Difference]: With dead ends: 46 [2024-11-27 19:51:17,849 INFO L226 Difference]: Without dead ends: 31 [2024-11-27 19:51:17,851 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 19:51:17,854 INFO L435 NwaCegarLoop]: 19 mSDtfsCounter, 14 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 98 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 59 SdHoareTripleChecker+Invalid, 100 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 98 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-27 19:51:17,855 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 59 Invalid, 100 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 98 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-27 19:51:17,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2024-11-27 19:51:17,881 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2024-11-27 19:51:17,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 20 states have (on average 1.25) internal successors, (25), 23 states have internal predecessors, (25), 6 states have call successors, (6), 3 states have call predecessors, (6), 4 states have return successors, (7), 6 states have call predecessors, (7), 6 states have call successors, (7) [2024-11-27 19:51:17,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 38 transitions. [2024-11-27 19:51:17,888 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 38 transitions. Word has length 13 [2024-11-27 19:51:17,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-27 19:51:17,888 INFO L471 AbstractCegarLoop]: Abstraction has 31 states and 38 transitions. [2024-11-27 19:51:17,888 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 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 19:51:17,888 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 38 transitions. [2024-11-27 19:51:17,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2024-11-27 19:51:17,890 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 19:51:17,890 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] [2024-11-27 19:51:17,890 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-27 19:51:17,890 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-27 19:51:17,891 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 19:51:17,891 INFO L85 PathProgramCache]: Analyzing trace with hash -1518425104, now seen corresponding path program 1 times [2024-11-27 19:51:17,891 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 19:51:17,891 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [867889711] [2024-11-27 19:51:17,891 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 19:51:17,891 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 19:51:17,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 19:51:18,240 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 19:51:18,240 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 19:51:18,241 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [867889711] [2024-11-27 19:51:18,241 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [867889711] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-27 19:51:18,241 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-27 19:51:18,241 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-11-27 19:51:18,241 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1502294854] [2024-11-27 19:51:18,241 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-27 19:51:18,244 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-27 19:51:18,244 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 19:51:18,245 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-27 19:51:18,245 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-11-27 19:51:18,245 INFO L87 Difference]: Start difference. First operand 31 states and 38 transitions. Second operand has 6 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 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 19:51:18,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 19:51:18,416 INFO L93 Difference]: Finished difference Result 61 states and 77 transitions. [2024-11-27 19:51:18,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-27 19:51:18,417 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 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 24 [2024-11-27 19:51:18,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 19:51:18,418 INFO L225 Difference]: With dead ends: 61 [2024-11-27 19:51:18,418 INFO L226 Difference]: Without dead ends: 33 [2024-11-27 19:51:18,419 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 19:51:18,420 INFO L435 NwaCegarLoop]: 23 mSDtfsCounter, 10 mSDsluCounter, 59 mSDsCounter, 0 mSdLazyCounter, 78 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 82 SdHoareTripleChecker+Invalid, 82 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 78 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-27 19:51:18,420 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 82 Invalid, 82 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 78 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-27 19:51:18,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2024-11-27 19:51:18,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2024-11-27 19:51:18,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 21 states have (on average 1.2380952380952381) internal successors, (26), 24 states have internal predecessors, (26), 6 states have call successors, (6), 3 states have call predecessors, (6), 5 states have return successors, (8), 6 states have call predecessors, (8), 6 states have call successors, (8) [2024-11-27 19:51:18,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 40 transitions. [2024-11-27 19:51:18,435 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 40 transitions. Word has length 24 [2024-11-27 19:51:18,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-27 19:51:18,435 INFO L471 AbstractCegarLoop]: Abstraction has 33 states and 40 transitions. [2024-11-27 19:51:18,436 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 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 19:51:18,436 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 40 transitions. [2024-11-27 19:51:18,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2024-11-27 19:51:18,438 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 19:51:18,438 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] [2024-11-27 19:51:18,438 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-27 19:51:18,438 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-27 19:51:18,439 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 19:51:18,439 INFO L85 PathProgramCache]: Analyzing trace with hash -1549340056, now seen corresponding path program 1 times [2024-11-27 19:51:18,439 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 19:51:18,439 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1013885576] [2024-11-27 19:51:18,440 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 19:51:18,440 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 19:51:18,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 19:51:18,834 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 19:51:18,834 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 19:51:18,834 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1013885576] [2024-11-27 19:51:18,834 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1013885576] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-27 19:51:18,834 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-27 19:51:18,834 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-11-27 19:51:18,835 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [844978906] [2024-11-27 19:51:18,835 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-27 19:51:18,835 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-27 19:51:18,835 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 19:51:18,836 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-27 19:51:18,836 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-11-27 19:51:18,836 INFO L87 Difference]: Start difference. First operand 33 states and 40 transitions. Second operand has 6 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 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 19:51:18,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 19:51:18,958 INFO L93 Difference]: Finished difference Result 65 states and 83 transitions. [2024-11-27 19:51:18,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-27 19:51:18,959 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 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 35 [2024-11-27 19:51:18,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 19:51:18,960 INFO L225 Difference]: With dead ends: 65 [2024-11-27 19:51:18,960 INFO L226 Difference]: Without dead ends: 35 [2024-11-27 19:51:18,961 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 19:51:18,961 INFO L435 NwaCegarLoop]: 31 mSDtfsCounter, 8 mSDsluCounter, 65 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 96 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-27 19:51:18,964 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 96 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-27 19:51:18,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2024-11-27 19:51:18,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2024-11-27 19:51:18,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 22 states have (on average 1.2272727272727273) internal successors, (27), 25 states have internal predecessors, (27), 6 states have call successors, (6), 3 states have call predecessors, (6), 6 states have return successors, (9), 6 states have call predecessors, (9), 6 states have call successors, (9) [2024-11-27 19:51:18,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 42 transitions. [2024-11-27 19:51:18,978 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 42 transitions. Word has length 35 [2024-11-27 19:51:18,979 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-27 19:51:18,979 INFO L471 AbstractCegarLoop]: Abstraction has 35 states and 42 transitions. [2024-11-27 19:51:18,979 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 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 19:51:18,979 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 42 transitions. [2024-11-27 19:51:18,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2024-11-27 19:51:18,981 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 19:51:18,982 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] [2024-11-27 19:51:18,982 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-11-27 19:51:18,983 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-27 19:51:18,983 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 19:51:18,986 INFO L85 PathProgramCache]: Analyzing trace with hash 1995545220, now seen corresponding path program 1 times [2024-11-27 19:51:18,986 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 19:51:18,986 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1250620406] [2024-11-27 19:51:18,986 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 19:51:18,986 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 19:51:19,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 19:51:19,650 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-27 19:51:19,650 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 19:51:19,650 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1250620406] [2024-11-27 19:51:19,651 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1250620406] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-27 19:51:19,651 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1825679105] [2024-11-27 19:51:19,651 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 19:51:19,651 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 19:51:19,652 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dab80af-618f-475b-9864-969976b18a30/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 19:51:19,656 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dab80af-618f-475b-9864-969976b18a30/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 19:51:19,658 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dab80af-618f-475b-9864-969976b18a30/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-27 19:51:19,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 19:51:19,794 INFO L256 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 28 conjuncts are in the unsatisfiable core [2024-11-27 19:51:19,806 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 19:51:19,845 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 19:51:20,068 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 19 treesize of output 11 [2024-11-27 19:51:20,121 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-27 19:51:20,123 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-27 19:51:20,482 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 7 treesize of output 3 [2024-11-27 19:51:20,764 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-27 19:51:20,765 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1825679105] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-27 19:51:20,765 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-27 19:51:20,765 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 22 [2024-11-27 19:51:20,765 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [211629267] [2024-11-27 19:51:20,766 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-27 19:51:20,766 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-11-27 19:51:20,766 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 19:51:20,767 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-11-27 19:51:20,767 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=404, Unknown=0, NotChecked=0, Total=462 [2024-11-27 19:51:20,768 INFO L87 Difference]: Start difference. First operand 35 states and 42 transitions. Second operand has 22 states, 17 states have (on average 3.0) internal successors, (51), 18 states have internal predecessors, (51), 10 states have call successors, (15), 5 states have call predecessors, (15), 8 states have return successors, (15), 9 states have call predecessors, (15), 10 states have call successors, (15) [2024-11-27 19:51:21,586 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 19:51:21,586 INFO L93 Difference]: Finished difference Result 80 states and 102 transitions. [2024-11-27 19:51:21,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2024-11-27 19:51:21,587 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 17 states have (on average 3.0) internal successors, (51), 18 states have internal predecessors, (51), 10 states have call successors, (15), 5 states have call predecessors, (15), 8 states have return successors, (15), 9 states have call predecessors, (15), 10 states have call successors, (15) Word has length 40 [2024-11-27 19:51:21,587 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 19:51:21,589 INFO L225 Difference]: With dead ends: 80 [2024-11-27 19:51:21,590 INFO L226 Difference]: Without dead ends: 46 [2024-11-27 19:51:21,591 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=147, Invalid=845, Unknown=0, NotChecked=0, Total=992 [2024-11-27 19:51:21,591 INFO L435 NwaCegarLoop]: 14 mSDtfsCounter, 38 mSDsluCounter, 151 mSDsCounter, 0 mSdLazyCounter, 426 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 165 SdHoareTripleChecker+Invalid, 445 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 426 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-11-27 19:51:21,592 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [40 Valid, 165 Invalid, 445 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 426 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-11-27 19:51:21,594 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2024-11-27 19:51:21,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 43. [2024-11-27 19:51:21,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 28 states have (on average 1.1785714285714286) internal successors, (33), 29 states have internal predecessors, (33), 6 states have call successors, (6), 4 states have call predecessors, (6), 8 states have return successors, (12), 9 states have call predecessors, (12), 6 states have call successors, (12) [2024-11-27 19:51:21,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 51 transitions. [2024-11-27 19:51:21,611 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 51 transitions. Word has length 40 [2024-11-27 19:51:21,611 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-27 19:51:21,611 INFO L471 AbstractCegarLoop]: Abstraction has 43 states and 51 transitions. [2024-11-27 19:51:21,611 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 17 states have (on average 3.0) internal successors, (51), 18 states have internal predecessors, (51), 10 states have call successors, (15), 5 states have call predecessors, (15), 8 states have return successors, (15), 9 states have call predecessors, (15), 10 states have call successors, (15) [2024-11-27 19:51:21,612 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 51 transitions. [2024-11-27 19:51:21,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2024-11-27 19:51:21,613 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 19:51:21,613 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 19:51:21,628 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dab80af-618f-475b-9864-969976b18a30/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-27 19:51:21,817 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dab80af-618f-475b-9864-969976b18a30/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 19:51:21,817 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-27 19:51:21,818 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 19:51:21,818 INFO L85 PathProgramCache]: Analyzing trace with hash -1008547690, now seen corresponding path program 1 times [2024-11-27 19:51:21,818 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 19:51:21,818 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [223214608] [2024-11-27 19:51:21,818 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 19:51:21,818 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 19:51:21,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 19:51:21,905 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2024-11-27 19:51:21,905 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 19:51:21,905 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [223214608] [2024-11-27 19:51:21,905 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [223214608] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-27 19:51:21,905 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-27 19:51:21,905 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-27 19:51:21,905 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1012823561] [2024-11-27 19:51:21,906 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-27 19:51:21,906 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-27 19:51:21,907 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 19:51:21,907 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-27 19:51:21,908 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-27 19:51:21,908 INFO L87 Difference]: Start difference. First operand 43 states and 51 transitions. Second operand has 4 states, 4 states have (on average 5.5) internal successors, (22), 4 states have internal predecessors, (22), 1 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2024-11-27 19:51:21,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 19:51:21,939 INFO L93 Difference]: Finished difference Result 49 states and 57 transitions. [2024-11-27 19:51:21,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-27 19:51:21,941 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 4 states have internal predecessors, (22), 1 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 45 [2024-11-27 19:51:21,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 19:51:21,942 INFO L225 Difference]: With dead ends: 49 [2024-11-27 19:51:21,943 INFO L226 Difference]: Without dead ends: 46 [2024-11-27 19:51:21,944 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 19:51:21,946 INFO L435 NwaCegarLoop]: 33 mSDtfsCounter, 1 mSDsluCounter, 60 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 93 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-27 19:51:21,947 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 93 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-27 19:51:21,948 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2024-11-27 19:51:21,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 45. [2024-11-27 19:51:21,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 30 states have (on average 1.1666666666666667) internal successors, (35), 31 states have internal predecessors, (35), 6 states have call successors, (6), 4 states have call predecessors, (6), 8 states have return successors, (12), 9 states have call predecessors, (12), 6 states have call successors, (12) [2024-11-27 19:51:21,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 53 transitions. [2024-11-27 19:51:21,962 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 53 transitions. Word has length 45 [2024-11-27 19:51:21,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-27 19:51:21,962 INFO L471 AbstractCegarLoop]: Abstraction has 45 states and 53 transitions. [2024-11-27 19:51:21,962 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 4 states have internal predecessors, (22), 1 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2024-11-27 19:51:21,963 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 53 transitions. [2024-11-27 19:51:21,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2024-11-27 19:51:21,965 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 19:51:21,965 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 19:51:21,965 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-11-27 19:51:21,966 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-27 19:51:21,966 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 19:51:21,966 INFO L85 PathProgramCache]: Analyzing trace with hash -1008545768, now seen corresponding path program 1 times [2024-11-27 19:51:21,966 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 19:51:21,966 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2048659165] [2024-11-27 19:51:21,967 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 19:51:21,967 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 19:51:21,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 19:51:22,686 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 6 proven. 8 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-11-27 19:51:22,686 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 19:51:22,686 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2048659165] [2024-11-27 19:51:22,687 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2048659165] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-27 19:51:22,687 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [147664876] [2024-11-27 19:51:22,687 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 19:51:22,687 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 19:51:22,687 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dab80af-618f-475b-9864-969976b18a30/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 19:51:22,689 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dab80af-618f-475b-9864-969976b18a30/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 19:51:22,694 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dab80af-618f-475b-9864-969976b18a30/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-27 19:51:22,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 19:51:22,821 INFO L256 TraceCheckSpWp]: Trace formula consists of 260 conjuncts, 26 conjuncts are in the unsatisfiable core [2024-11-27 19:51:22,825 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 19:51:22,835 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 19:51:23,129 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2024-11-27 19:51:23,129 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-27 19:51:23,721 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2024-11-27 19:51:23,721 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [147664876] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-27 19:51:23,721 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-27 19:51:23,721 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9, 10] total 27 [2024-11-27 19:51:23,721 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1747967519] [2024-11-27 19:51:23,722 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-27 19:51:23,722 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2024-11-27 19:51:23,722 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 19:51:23,723 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2024-11-27 19:51:23,723 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=605, Unknown=0, NotChecked=0, Total=702 [2024-11-27 19:51:23,726 INFO L87 Difference]: Start difference. First operand 45 states and 53 transitions. Second operand has 27 states, 20 states have (on average 2.55) internal successors, (51), 23 states have internal predecessors, (51), 11 states have call successors, (16), 5 states have call predecessors, (16), 9 states have return successors, (16), 8 states have call predecessors, (16), 11 states have call successors, (16) [2024-11-27 19:51:24,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 19:51:24,326 INFO L93 Difference]: Finished difference Result 85 states and 106 transitions. [2024-11-27 19:51:24,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-11-27 19:51:24,327 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 20 states have (on average 2.55) internal successors, (51), 23 states have internal predecessors, (51), 11 states have call successors, (16), 5 states have call predecessors, (16), 9 states have return successors, (16), 8 states have call predecessors, (16), 11 states have call successors, (16) Word has length 45 [2024-11-27 19:51:24,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 19:51:24,328 INFO L225 Difference]: With dead ends: 85 [2024-11-27 19:51:24,328 INFO L226 Difference]: Without dead ends: 45 [2024-11-27 19:51:24,329 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 79 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 294 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=210, Invalid=1196, Unknown=0, NotChecked=0, Total=1406 [2024-11-27 19:51:24,330 INFO L435 NwaCegarLoop]: 16 mSDtfsCounter, 58 mSDsluCounter, 148 mSDsCounter, 0 mSdLazyCounter, 323 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 164 SdHoareTripleChecker+Invalid, 360 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 323 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-27 19:51:24,330 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [60 Valid, 164 Invalid, 360 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 323 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-27 19:51:24,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2024-11-27 19:51:24,338 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2024-11-27 19:51:24,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 29 states have (on average 1.1724137931034482) internal successors, (34), 31 states have internal predecessors, (34), 6 states have call successors, (6), 4 states have call predecessors, (6), 9 states have return successors, (12), 9 states have call predecessors, (12), 6 states have call successors, (12) [2024-11-27 19:51:24,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 52 transitions. [2024-11-27 19:51:24,339 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 52 transitions. Word has length 45 [2024-11-27 19:51:24,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-27 19:51:24,339 INFO L471 AbstractCegarLoop]: Abstraction has 45 states and 52 transitions. [2024-11-27 19:51:24,340 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 20 states have (on average 2.55) internal successors, (51), 23 states have internal predecessors, (51), 11 states have call successors, (16), 5 states have call predecessors, (16), 9 states have return successors, (16), 8 states have call predecessors, (16), 11 states have call successors, (16) [2024-11-27 19:51:24,340 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 52 transitions. [2024-11-27 19:51:24,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2024-11-27 19:51:24,341 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 19:51:24,342 INFO L218 NwaCegarLoop]: trace histogram [8, 8, 6, 6, 6, 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] [2024-11-27 19:51:24,352 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dab80af-618f-475b-9864-969976b18a30/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-11-27 19:51:24,546 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dab80af-618f-475b-9864-969976b18a30/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 19:51:24,546 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-27 19:51:24,546 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 19:51:24,546 INFO L85 PathProgramCache]: Analyzing trace with hash -1357665073, now seen corresponding path program 2 times [2024-11-27 19:51:24,546 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 19:51:24,547 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1645305133] [2024-11-27 19:51:24,547 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-27 19:51:24,547 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 19:51:24,581 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-27 19:51:24,581 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 19:51:25,572 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 10 proven. 97 refuted. 0 times theorem prover too weak. 62 trivial. 0 not checked. [2024-11-27 19:51:25,572 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 19:51:25,572 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1645305133] [2024-11-27 19:51:25,572 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1645305133] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-27 19:51:25,572 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [134920690] [2024-11-27 19:51:25,572 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-27 19:51:25,573 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 19:51:25,573 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dab80af-618f-475b-9864-969976b18a30/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 19:51:25,575 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dab80af-618f-475b-9864-969976b18a30/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 19:51:25,579 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dab80af-618f-475b-9864-969976b18a30/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-27 19:51:25,730 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-27 19:51:25,730 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 19:51:25,733 INFO L256 TraceCheckSpWp]: Trace formula consists of 458 conjuncts, 50 conjuncts are in the unsatisfiable core [2024-11-27 19:51:25,738 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 19:51:25,742 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 19:51:25,983 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 85 proven. 15 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2024-11-27 19:51:25,983 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-27 19:51:28,415 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 6 proven. 109 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2024-11-27 19:51:28,415 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [134920690] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-27 19:51:28,415 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-27 19:51:28,415 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11, 18] total 32 [2024-11-27 19:51:28,415 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2098836964] [2024-11-27 19:51:28,415 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-27 19:51:28,416 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2024-11-27 19:51:28,416 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 19:51:28,418 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2024-11-27 19:51:28,419 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=197, Invalid=795, Unknown=0, NotChecked=0, Total=992 [2024-11-27 19:51:28,420 INFO L87 Difference]: Start difference. First operand 45 states and 52 transitions. Second operand has 32 states, 24 states have (on average 2.6666666666666665) internal successors, (64), 27 states have internal predecessors, (64), 10 states have call successors, (21), 7 states have call predecessors, (21), 11 states have return successors, (26), 9 states have call predecessors, (26), 10 states have call successors, (26) [2024-11-27 19:51:28,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 19:51:28,908 INFO L93 Difference]: Finished difference Result 89 states and 109 transitions. [2024-11-27 19:51:28,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-11-27 19:51:28,909 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 24 states have (on average 2.6666666666666665) internal successors, (64), 27 states have internal predecessors, (64), 10 states have call successors, (21), 7 states have call predecessors, (21), 11 states have return successors, (26), 9 states have call predecessors, (26), 10 states have call successors, (26) Word has length 87 [2024-11-27 19:51:28,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 19:51:28,910 INFO L225 Difference]: With dead ends: 89 [2024-11-27 19:51:28,910 INFO L226 Difference]: Without dead ends: 49 [2024-11-27 19:51:28,912 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 197 GetRequests, 158 SyntacticMatches, 2 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 500 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=298, Invalid=1184, Unknown=0, NotChecked=0, Total=1482 [2024-11-27 19:51:28,912 INFO L435 NwaCegarLoop]: 34 mSDtfsCounter, 21 mSDsluCounter, 298 mSDsCounter, 0 mSdLazyCounter, 231 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 332 SdHoareTripleChecker+Invalid, 249 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 231 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-27 19:51:28,915 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 332 Invalid, 249 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 231 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-27 19:51:28,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2024-11-27 19:51:28,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2024-11-27 19:51:28,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 31 states have (on average 1.1612903225806452) internal successors, (36), 33 states have internal predecessors, (36), 6 states have call successors, (6), 4 states have call predecessors, (6), 11 states have return successors, (14), 11 states have call predecessors, (14), 6 states have call successors, (14) [2024-11-27 19:51:28,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 56 transitions. [2024-11-27 19:51:28,930 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 56 transitions. Word has length 87 [2024-11-27 19:51:28,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-27 19:51:28,933 INFO L471 AbstractCegarLoop]: Abstraction has 49 states and 56 transitions. [2024-11-27 19:51:28,933 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 24 states have (on average 2.6666666666666665) internal successors, (64), 27 states have internal predecessors, (64), 10 states have call successors, (21), 7 states have call predecessors, (21), 11 states have return successors, (26), 9 states have call predecessors, (26), 10 states have call successors, (26) [2024-11-27 19:51:28,933 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 56 transitions. [2024-11-27 19:51:28,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2024-11-27 19:51:28,935 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 19:51:28,935 INFO L218 NwaCegarLoop]: trace histogram [12, 12, 10, 10, 10, 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] [2024-11-27 19:51:28,953 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dab80af-618f-475b-9864-969976b18a30/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-11-27 19:51:29,135 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dab80af-618f-475b-9864-969976b18a30/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2024-11-27 19:51:29,136 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-27 19:51:29,140 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 19:51:29,140 INFO L85 PathProgramCache]: Analyzing trace with hash -1630787441, now seen corresponding path program 3 times [2024-11-27 19:51:29,140 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 19:51:29,140 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1596578200] [2024-11-27 19:51:29,140 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-27 19:51:29,141 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 19:51:29,170 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-11-27 19:51:29,170 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 19:51:29,691 INFO L134 CoverageAnalysis]: Checked inductivity of 351 backedges. 22 proven. 11 refuted. 0 times theorem prover too weak. 318 trivial. 0 not checked. [2024-11-27 19:51:29,691 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 19:51:29,691 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1596578200] [2024-11-27 19:51:29,691 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1596578200] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-27 19:51:29,691 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [915121661] [2024-11-27 19:51:29,691 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-27 19:51:29,691 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 19:51:29,691 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dab80af-618f-475b-9864-969976b18a30/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 19:51:29,694 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dab80af-618f-475b-9864-969976b18a30/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 19:51:29,698 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dab80af-618f-475b-9864-969976b18a30/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-27 19:51:29,841 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-11-27 19:51:29,841 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 19:51:29,844 INFO L256 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 50 conjuncts are in the unsatisfiable core [2024-11-27 19:51:29,849 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 19:51:29,856 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 19:51:30,298 INFO L134 CoverageAnalysis]: Checked inductivity of 351 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 339 trivial. 0 not checked. [2024-11-27 19:51:30,298 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-27 19:51:31,699 INFO L134 CoverageAnalysis]: Checked inductivity of 351 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 336 trivial. 0 not checked. [2024-11-27 19:51:31,699 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [915121661] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-27 19:51:31,700 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-27 19:51:31,700 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 14] total 34 [2024-11-27 19:51:31,700 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2082037781] [2024-11-27 19:51:31,700 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-27 19:51:31,701 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2024-11-27 19:51:31,701 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 19:51:31,701 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2024-11-27 19:51:31,702 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=147, Invalid=975, Unknown=0, NotChecked=0, Total=1122 [2024-11-27 19:51:31,702 INFO L87 Difference]: Start difference. First operand 49 states and 56 transitions. Second operand has 34 states, 26 states have (on average 2.3461538461538463) internal successors, (61), 30 states have internal predecessors, (61), 16 states have call successors, (20), 6 states have call predecessors, (20), 10 states have return successors, (20), 15 states have call predecessors, (20), 16 states have call successors, (20) [2024-11-27 19:51:33,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 19:51:33,008 INFO L93 Difference]: Finished difference Result 84 states and 104 transitions. [2024-11-27 19:51:33,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2024-11-27 19:51:33,009 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 26 states have (on average 2.3461538461538463) internal successors, (61), 30 states have internal predecessors, (61), 16 states have call successors, (20), 6 states have call predecessors, (20), 10 states have return successors, (20), 15 states have call predecessors, (20), 16 states have call successors, (20) Word has length 107 [2024-11-27 19:51:33,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 19:51:33,010 INFO L225 Difference]: With dead ends: 84 [2024-11-27 19:51:33,014 INFO L226 Difference]: Without dead ends: 75 [2024-11-27 19:51:33,016 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 249 GetRequests, 197 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 514 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=408, Invalid=2454, Unknown=0, NotChecked=0, Total=2862 [2024-11-27 19:51:33,017 INFO L435 NwaCegarLoop]: 20 mSDtfsCounter, 50 mSDsluCounter, 254 mSDsCounter, 0 mSdLazyCounter, 719 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 274 SdHoareTripleChecker+Invalid, 759 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 719 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-11-27 19:51:33,017 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [50 Valid, 274 Invalid, 759 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 719 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-11-27 19:51:33,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2024-11-27 19:51:33,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 67. [2024-11-27 19:51:33,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 42 states have (on average 1.1666666666666667) internal successors, (49), 43 states have internal predecessors, (49), 7 states have call successors, (7), 5 states have call predecessors, (7), 17 states have return successors, (28), 18 states have call predecessors, (28), 7 states have call successors, (28) [2024-11-27 19:51:33,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 84 transitions. [2024-11-27 19:51:33,045 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 84 transitions. Word has length 107 [2024-11-27 19:51:33,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-27 19:51:33,046 INFO L471 AbstractCegarLoop]: Abstraction has 67 states and 84 transitions. [2024-11-27 19:51:33,046 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 26 states have (on average 2.3461538461538463) internal successors, (61), 30 states have internal predecessors, (61), 16 states have call successors, (20), 6 states have call predecessors, (20), 10 states have return successors, (20), 15 states have call predecessors, (20), 16 states have call successors, (20) [2024-11-27 19:51:33,046 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 84 transitions. [2024-11-27 19:51:33,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2024-11-27 19:51:33,048 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 19:51:33,048 INFO L218 NwaCegarLoop]: trace histogram [18, 18, 15, 15, 15, 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] [2024-11-27 19:51:33,059 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dab80af-618f-475b-9864-969976b18a30/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-11-27 19:51:33,249 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dab80af-618f-475b-9864-969976b18a30/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2024-11-27 19:51:33,249 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-27 19:51:33,249 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 19:51:33,249 INFO L85 PathProgramCache]: Analyzing trace with hash -179007914, now seen corresponding path program 1 times [2024-11-27 19:51:33,249 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 19:51:33,249 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [545948925] [2024-11-27 19:51:33,249 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 19:51:33,250 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 19:51:33,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 19:51:34,016 INFO L134 CoverageAnalysis]: Checked inductivity of 819 backedges. 30 proven. 25 refuted. 0 times theorem prover too weak. 764 trivial. 0 not checked. [2024-11-27 19:51:34,016 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 19:51:34,016 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [545948925] [2024-11-27 19:51:34,016 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [545948925] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-27 19:51:34,016 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [743953331] [2024-11-27 19:51:34,016 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 19:51:34,016 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 19:51:34,017 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dab80af-618f-475b-9864-969976b18a30/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 19:51:34,018 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dab80af-618f-475b-9864-969976b18a30/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 19:51:34,021 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dab80af-618f-475b-9864-969976b18a30/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-27 19:51:34,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 19:51:34,251 INFO L256 TraceCheckSpWp]: Trace formula consists of 742 conjuncts, 28 conjuncts are in the unsatisfiable core [2024-11-27 19:51:34,256 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 19:51:34,302 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 19:51:34,504 INFO L134 CoverageAnalysis]: Checked inductivity of 819 backedges. 410 proven. 3 refuted. 0 times theorem prover too weak. 406 trivial. 0 not checked. [2024-11-27 19:51:34,505 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-27 19:51:35,798 INFO L134 CoverageAnalysis]: Checked inductivity of 819 backedges. 30 proven. 26 refuted. 0 times theorem prover too weak. 763 trivial. 0 not checked. [2024-11-27 19:51:35,798 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [743953331] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-27 19:51:35,798 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-27 19:51:35,799 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 10] total 22 [2024-11-27 19:51:35,799 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1360496610] [2024-11-27 19:51:35,799 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-27 19:51:35,800 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-11-27 19:51:35,800 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 19:51:35,801 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-11-27 19:51:35,802 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=367, Unknown=0, NotChecked=0, Total=462 [2024-11-27 19:51:35,803 INFO L87 Difference]: Start difference. First operand 67 states and 84 transitions. Second operand has 22 states, 16 states have (on average 3.6875) internal successors, (59), 19 states have internal predecessors, (59), 11 states have call successors, (21), 5 states have call predecessors, (21), 7 states have return successors, (22), 8 states have call predecessors, (22), 11 states have call successors, (22) [2024-11-27 19:51:36,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 19:51:36,207 INFO L93 Difference]: Finished difference Result 117 states and 149 transitions. [2024-11-27 19:51:36,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-27 19:51:36,207 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 16 states have (on average 3.6875) internal successors, (59), 19 states have internal predecessors, (59), 11 states have call successors, (21), 5 states have call predecessors, (21), 7 states have return successors, (22), 8 states have call predecessors, (22), 11 states have call successors, (22) Word has length 154 [2024-11-27 19:51:36,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 19:51:36,209 INFO L225 Difference]: With dead ends: 117 [2024-11-27 19:51:36,209 INFO L226 Difference]: Without dead ends: 55 [2024-11-27 19:51:36,210 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 321 GetRequests, 296 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 177 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=150, Invalid=552, Unknown=0, NotChecked=0, Total=702 [2024-11-27 19:51:36,211 INFO L435 NwaCegarLoop]: 23 mSDtfsCounter, 28 mSDsluCounter, 190 mSDsCounter, 0 mSdLazyCounter, 251 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 213 SdHoareTripleChecker+Invalid, 269 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 251 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-27 19:51:36,211 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 213 Invalid, 269 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 251 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-27 19:51:36,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2024-11-27 19:51:36,221 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2024-11-27 19:51:36,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 34 states have (on average 1.1470588235294117) internal successors, (39), 36 states have internal predecessors, (39), 6 states have call successors, (6), 4 states have call predecessors, (6), 14 states have return successors, (17), 14 states have call predecessors, (17), 6 states have call successors, (17) [2024-11-27 19:51:36,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 62 transitions. [2024-11-27 19:51:36,222 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 62 transitions. Word has length 154 [2024-11-27 19:51:36,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-27 19:51:36,223 INFO L471 AbstractCegarLoop]: Abstraction has 55 states and 62 transitions. [2024-11-27 19:51:36,223 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 16 states have (on average 3.6875) internal successors, (59), 19 states have internal predecessors, (59), 11 states have call successors, (21), 5 states have call predecessors, (21), 7 states have return successors, (22), 8 states have call predecessors, (22), 11 states have call successors, (22) [2024-11-27 19:51:36,223 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 62 transitions. [2024-11-27 19:51:36,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 371 [2024-11-27 19:51:36,235 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 19:51:36,235 INFO L218 NwaCegarLoop]: trace histogram [54, 54, 45, 45, 45, 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] [2024-11-27 19:51:36,248 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dab80af-618f-475b-9864-969976b18a30/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2024-11-27 19:51:36,436 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dab80af-618f-475b-9864-969976b18a30/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2024-11-27 19:51:36,436 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-27 19:51:36,436 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 19:51:36,437 INFO L85 PathProgramCache]: Analyzing trace with hash -1278376404, now seen corresponding path program 4 times [2024-11-27 19:51:36,437 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 19:51:36,437 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1820366834] [2024-11-27 19:51:36,437 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-27 19:51:36,437 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 19:51:36,560 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-27 19:51:36,562 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 19:51:40,364 INFO L134 CoverageAnalysis]: Checked inductivity of 7119 backedges. 20 proven. 1431 refuted. 0 times theorem prover too weak. 5668 trivial. 0 not checked. [2024-11-27 19:51:40,365 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 19:51:40,365 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1820366834] [2024-11-27 19:51:40,365 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1820366834] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-27 19:51:40,365 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1490633789] [2024-11-27 19:51:40,365 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-27 19:51:40,365 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 19:51:40,366 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dab80af-618f-475b-9864-969976b18a30/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 19:51:40,368 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dab80af-618f-475b-9864-969976b18a30/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 19:51:40,373 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dab80af-618f-475b-9864-969976b18a30/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-27 19:51:40,855 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-27 19:51:40,856 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 19:51:40,865 INFO L256 TraceCheckSpWp]: Trace formula consists of 1584 conjuncts, 74 conjuncts are in the unsatisfiable core [2024-11-27 19:51:40,880 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 19:51:40,888 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 19:51:41,217 INFO L134 CoverageAnalysis]: Checked inductivity of 7119 backedges. 1390 proven. 35 refuted. 0 times theorem prover too weak. 5694 trivial. 0 not checked. [2024-11-27 19:51:41,217 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-27 19:51:46,054 INFO L134 CoverageAnalysis]: Checked inductivity of 7119 backedges. 12 proven. 1466 refuted. 0 times theorem prover too weak. 5641 trivial. 0 not checked. [2024-11-27 19:51:46,055 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1490633789] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-27 19:51:46,055 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-27 19:51:46,055 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13, 26] total 42 [2024-11-27 19:51:46,057 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [164861696] [2024-11-27 19:51:46,058 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-27 19:51:46,060 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2024-11-27 19:51:46,060 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 19:51:46,061 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2024-11-27 19:51:46,063 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=331, Invalid=1391, Unknown=0, NotChecked=0, Total=1722 [2024-11-27 19:51:46,063 INFO L87 Difference]: Start difference. First operand 55 states and 62 transitions. Second operand has 42 states, 32 states have (on average 2.25) internal successors, (72), 35 states have internal predecessors, (72), 12 states have call successors, (23), 9 states have call predecessors, (23), 15 states have return successors, (32), 13 states have call predecessors, (32), 12 states have call successors, (32) [2024-11-27 19:51:46,667 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 19:51:46,668 INFO L93 Difference]: Finished difference Result 107 states and 129 transitions. [2024-11-27 19:51:46,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-11-27 19:51:46,668 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 32 states have (on average 2.25) internal successors, (72), 35 states have internal predecessors, (72), 12 states have call successors, (23), 9 states have call predecessors, (23), 15 states have return successors, (32), 13 states have call predecessors, (32), 12 states have call successors, (32) Word has length 370 [2024-11-27 19:51:46,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 19:51:46,670 INFO L225 Difference]: With dead ends: 107 [2024-11-27 19:51:46,670 INFO L226 Difference]: Without dead ends: 57 [2024-11-27 19:51:46,671 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 772 GetRequests, 720 SyntacticMatches, 4 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 922 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=486, Invalid=1964, Unknown=0, NotChecked=0, Total=2450 [2024-11-27 19:51:46,672 INFO L435 NwaCegarLoop]: 36 mSDtfsCounter, 54 mSDsluCounter, 402 mSDsCounter, 0 mSdLazyCounter, 320 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 438 SdHoareTripleChecker+Invalid, 356 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 320 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-27 19:51:46,672 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [54 Valid, 438 Invalid, 356 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 320 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-27 19:51:46,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2024-11-27 19:51:46,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2024-11-27 19:51:46,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 35 states have (on average 1.1428571428571428) internal successors, (40), 37 states have internal predecessors, (40), 6 states have call successors, (6), 4 states have call predecessors, (6), 15 states have return successors, (18), 15 states have call predecessors, (18), 6 states have call successors, (18) [2024-11-27 19:51:46,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 64 transitions. [2024-11-27 19:51:46,683 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 64 transitions. Word has length 370 [2024-11-27 19:51:46,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-27 19:51:46,683 INFO L471 AbstractCegarLoop]: Abstraction has 57 states and 64 transitions. [2024-11-27 19:51:46,684 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 32 states have (on average 2.25) internal successors, (72), 35 states have internal predecessors, (72), 12 states have call successors, (23), 9 states have call predecessors, (23), 15 states have return successors, (32), 13 states have call predecessors, (32), 12 states have call successors, (32) [2024-11-27 19:51:46,684 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 64 transitions. [2024-11-27 19:51:46,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 416 [2024-11-27 19:51:46,691 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 19:51:46,691 INFO L218 NwaCegarLoop]: trace histogram [63, 63, 54, 54, 54, 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] [2024-11-27 19:51:46,705 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dab80af-618f-475b-9864-969976b18a30/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-11-27 19:51:46,895 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dab80af-618f-475b-9864-969976b18a30/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2024-11-27 19:51:46,895 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-27 19:51:46,895 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 19:51:46,896 INFO L85 PathProgramCache]: Analyzing trace with hash -1564459760, now seen corresponding path program 5 times [2024-11-27 19:51:46,896 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 19:51:46,896 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [204166223] [2024-11-27 19:51:46,896 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-27 19:51:46,896 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 19:51:47,356 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2024-11-27 19:51:47,356 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 19:51:53,574 INFO L134 CoverageAnalysis]: Checked inductivity of 9648 backedges. 429 proven. 631 refuted. 0 times theorem prover too weak. 8588 trivial. 0 not checked. [2024-11-27 19:51:53,574 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 19:51:53,574 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [204166223] [2024-11-27 19:51:53,574 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [204166223] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-27 19:51:53,574 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1155310426] [2024-11-27 19:51:53,575 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-27 19:51:53,575 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 19:51:53,575 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dab80af-618f-475b-9864-969976b18a30/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 19:51:53,579 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dab80af-618f-475b-9864-969976b18a30/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 19:51:53,582 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dab80af-618f-475b-9864-969976b18a30/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-27 19:52:18,220 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2024-11-27 19:52:18,220 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 19:52:18,250 INFO L256 TraceCheckSpWp]: Trace formula consists of 1596 conjuncts, 68 conjuncts are in the unsatisfiable core [2024-11-27 19:52:18,265 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 19:52:18,281 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 19:52:18,778 INFO L134 CoverageAnalysis]: Checked inductivity of 9648 backedges. 4366 proven. 15 refuted. 0 times theorem prover too weak. 5267 trivial. 0 not checked. [2024-11-27 19:52:18,778 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-27 19:52:22,309 INFO L134 CoverageAnalysis]: Checked inductivity of 9648 backedges. 6 proven. 221 refuted. 0 times theorem prover too weak. 9421 trivial. 0 not checked. [2024-11-27 19:52:22,309 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1155310426] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-27 19:52:22,309 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-27 19:52:22,310 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 11, 18] total 44 [2024-11-27 19:52:22,310 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [971554757] [2024-11-27 19:52:22,310 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-27 19:52:22,311 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2024-11-27 19:52:22,311 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 19:52:22,312 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2024-11-27 19:52:22,313 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=285, Invalid=1607, Unknown=0, NotChecked=0, Total=1892 [2024-11-27 19:52:22,313 INFO L87 Difference]: Start difference. First operand 57 states and 64 transitions. Second operand has 44 states, 30 states have (on average 2.6333333333333333) internal successors, (79), 38 states have internal predecessors, (79), 21 states have call successors, (31), 8 states have call predecessors, (31), 13 states have return successors, (34), 16 states have call predecessors, (34), 21 states have call successors, (34) [2024-11-27 19:52:22,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 19:52:22,921 INFO L93 Difference]: Finished difference Result 111 states and 129 transitions. [2024-11-27 19:52:22,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-11-27 19:52:22,921 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 30 states have (on average 2.6333333333333333) internal successors, (79), 38 states have internal predecessors, (79), 21 states have call successors, (31), 8 states have call predecessors, (31), 13 states have return successors, (34), 16 states have call predecessors, (34), 21 states have call successors, (34) Word has length 415 [2024-11-27 19:52:22,922 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 19:52:22,923 INFO L225 Difference]: With dead ends: 111 [2024-11-27 19:52:22,923 INFO L226 Difference]: Without dead ends: 59 [2024-11-27 19:52:22,927 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 884 GetRequests, 830 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 783 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=452, Invalid=2628, Unknown=0, NotChecked=0, Total=3080 [2024-11-27 19:52:22,928 INFO L435 NwaCegarLoop]: 26 mSDtfsCounter, 47 mSDsluCounter, 238 mSDsCounter, 0 mSdLazyCounter, 299 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 264 SdHoareTripleChecker+Invalid, 336 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 299 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-27 19:52:22,928 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [47 Valid, 264 Invalid, 336 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 299 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-27 19:52:22,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2024-11-27 19:52:22,950 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2024-11-27 19:52:22,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 36 states have (on average 1.1388888888888888) internal successors, (41), 38 states have internal predecessors, (41), 6 states have call successors, (6), 4 states have call predecessors, (6), 16 states have return successors, (19), 16 states have call predecessors, (19), 6 states have call successors, (19) [2024-11-27 19:52:22,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 66 transitions. [2024-11-27 19:52:22,952 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 66 transitions. Word has length 415 [2024-11-27 19:52:22,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-27 19:52:22,955 INFO L471 AbstractCegarLoop]: Abstraction has 59 states and 66 transitions. [2024-11-27 19:52:22,955 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 30 states have (on average 2.6333333333333333) internal successors, (79), 38 states have internal predecessors, (79), 21 states have call successors, (31), 8 states have call predecessors, (31), 13 states have return successors, (34), 16 states have call predecessors, (34), 21 states have call successors, (34) [2024-11-27 19:52:22,955 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 66 transitions. [2024-11-27 19:52:22,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 539 [2024-11-27 19:52:22,970 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 19:52:22,970 INFO L218 NwaCegarLoop]: trace histogram [84, 84, 72, 72, 72, 15, 15, 12, 12, 12, 12, 12, 12, 12, 4, 4, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 19:52:23,006 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dab80af-618f-475b-9864-969976b18a30/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2024-11-27 19:52:23,171 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dab80af-618f-475b-9864-969976b18a30/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 19:52:23,171 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-27 19:52:23,172 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 19:52:23,172 INFO L85 PathProgramCache]: Analyzing trace with hash -269020316, now seen corresponding path program 6 times [2024-11-27 19:52:23,172 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 19:52:23,172 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1704299865] [2024-11-27 19:52:23,172 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-27 19:52:23,172 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 19:52:23,255 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2024-11-27 19:52:23,255 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 19:52:24,210 INFO L134 CoverageAnalysis]: Checked inductivity of 17151 backedges. 6 proven. 21 refuted. 0 times theorem prover too weak. 17124 trivial. 0 not checked. [2024-11-27 19:52:24,210 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 19:52:24,210 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1704299865] [2024-11-27 19:52:24,210 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1704299865] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-27 19:52:24,211 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1841023458] [2024-11-27 19:52:24,211 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-27 19:52:24,211 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 19:52:24,211 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dab80af-618f-475b-9864-969976b18a30/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 19:52:24,215 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dab80af-618f-475b-9864-969976b18a30/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 19:52:24,217 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dab80af-618f-475b-9864-969976b18a30/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-27 19:52:24,563 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2024-11-27 19:52:24,563 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 19:52:24,566 INFO L256 TraceCheckSpWp]: Trace formula consists of 491 conjuncts, 52 conjuncts are in the unsatisfiable core [2024-11-27 19:52:24,581 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 19:52:24,585 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 19:52:24,896 INFO L134 CoverageAnalysis]: Checked inductivity of 17151 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 17136 trivial. 0 not checked. [2024-11-27 19:52:24,896 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-27 19:52:28,360 INFO L134 CoverageAnalysis]: Checked inductivity of 17151 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 17118 trivial. 0 not checked. [2024-11-27 19:52:28,361 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1841023458] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-27 19:52:28,361 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-27 19:52:28,361 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 11, 18] total 40 [2024-11-27 19:52:28,361 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2135575457] [2024-11-27 19:52:28,361 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-27 19:52:28,362 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2024-11-27 19:52:28,362 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 19:52:28,363 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2024-11-27 19:52:28,364 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=264, Invalid=1296, Unknown=0, NotChecked=0, Total=1560 [2024-11-27 19:52:28,364 INFO L87 Difference]: Start difference. First operand 59 states and 66 transitions. Second operand has 40 states, 30 states have (on average 1.9) internal successors, (57), 35 states have internal predecessors, (57), 18 states have call successors, (20), 6 states have call predecessors, (20), 12 states have return successors, (22), 18 states have call predecessors, (22), 18 states have call successors, (22) [2024-11-27 19:52:28,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 19:52:28,918 INFO L93 Difference]: Finished difference Result 72 states and 82 transitions. [2024-11-27 19:52:28,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-11-27 19:52:28,920 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 30 states have (on average 1.9) internal successors, (57), 35 states have internal predecessors, (57), 18 states have call successors, (20), 6 states have call predecessors, (20), 12 states have return successors, (22), 18 states have call predecessors, (22), 18 states have call successors, (22) Word has length 538 [2024-11-27 19:52:28,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 19:52:28,926 INFO L225 Difference]: With dead ends: 72 [2024-11-27 19:52:28,926 INFO L226 Difference]: Without dead ends: 63 [2024-11-27 19:52:28,927 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 1101 GetRequests, 1056 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 621 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=384, Invalid=1778, Unknown=0, NotChecked=0, Total=2162 [2024-11-27 19:52:28,928 INFO L435 NwaCegarLoop]: 18 mSDtfsCounter, 69 mSDsluCounter, 205 mSDsCounter, 0 mSdLazyCounter, 410 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 223 SdHoareTripleChecker+Invalid, 457 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 410 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-27 19:52:28,928 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [72 Valid, 223 Invalid, 457 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 410 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-27 19:52:28,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2024-11-27 19:52:28,946 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2024-11-27 19:52:28,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 38 states have (on average 1.131578947368421) internal successors, (43), 40 states have internal predecessors, (43), 6 states have call successors, (6), 4 states have call predecessors, (6), 18 states have return successors, (21), 18 states have call predecessors, (21), 6 states have call successors, (21) [2024-11-27 19:52:28,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 70 transitions. [2024-11-27 19:52:28,947 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 70 transitions. Word has length 538 [2024-11-27 19:52:28,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-27 19:52:28,949 INFO L471 AbstractCegarLoop]: Abstraction has 63 states and 70 transitions. [2024-11-27 19:52:28,949 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 30 states have (on average 1.9) internal successors, (57), 35 states have internal predecessors, (57), 18 states have call successors, (20), 6 states have call predecessors, (20), 12 states have return successors, (22), 18 states have call predecessors, (22), 18 states have call successors, (22) [2024-11-27 19:52:28,949 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 70 transitions. [2024-11-27 19:52:28,982 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 889 [2024-11-27 19:52:28,982 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 19:52:28,983 INFO L218 NwaCegarLoop]: trace histogram [140, 140, 120, 120, 120, 25, 25, 20, 20, 20, 20, 20, 20, 20, 6, 6, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 19:52:28,994 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dab80af-618f-475b-9864-969976b18a30/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-11-27 19:52:29,183 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dab80af-618f-475b-9864-969976b18a30/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 19:52:29,183 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-27 19:52:29,184 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 19:52:29,184 INFO L85 PathProgramCache]: Analyzing trace with hash -1388661156, now seen corresponding path program 7 times [2024-11-27 19:52:29,184 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 19:52:29,184 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1785011409] [2024-11-27 19:52:29,184 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-27 19:52:29,185 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 19:52:29,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 19:52:37,923 INFO L134 CoverageAnalysis]: Checked inductivity of 47920 backedges. 21 proven. 631 refuted. 0 times theorem prover too weak. 47268 trivial. 0 not checked. [2024-11-27 19:52:37,923 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 19:52:37,923 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1785011409] [2024-11-27 19:52:37,924 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1785011409] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-27 19:52:37,924 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1884831300] [2024-11-27 19:52:37,924 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-27 19:52:37,924 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 19:52:37,924 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dab80af-618f-475b-9864-969976b18a30/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 19:52:37,927 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dab80af-618f-475b-9864-969976b18a30/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 19:52:37,930 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dab80af-618f-475b-9864-969976b18a30/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-11-27 19:52:38,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 19:52:38,912 INFO L256 TraceCheckSpWp]: Trace formula consists of 3692 conjuncts, 67 conjuncts are in the unsatisfiable core [2024-11-27 19:52:38,934 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 19:52:38,964 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 19:52:39,388 INFO L134 CoverageAnalysis]: Checked inductivity of 47920 backedges. 15919 proven. 24 refuted. 0 times theorem prover too weak. 31977 trivial. 0 not checked. [2024-11-27 19:52:39,388 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-27 19:52:47,817 INFO L134 CoverageAnalysis]: Checked inductivity of 47920 backedges. 469 proven. 209 refuted. 0 times theorem prover too weak. 47242 trivial. 0 not checked. [2024-11-27 19:52:47,817 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1884831300] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-27 19:52:47,818 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-27 19:52:47,818 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12, 22] total 40 [2024-11-27 19:52:47,818 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [277862472] [2024-11-27 19:52:47,818 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-27 19:52:47,820 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2024-11-27 19:52:47,820 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 19:52:47,821 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2024-11-27 19:52:47,822 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=313, Invalid=1247, Unknown=0, NotChecked=0, Total=1560 [2024-11-27 19:52:47,822 INFO L87 Difference]: Start difference. First operand 63 states and 70 transitions. Second operand has 40 states, 30 states have (on average 2.566666666666667) internal successors, (77), 34 states have internal predecessors, (77), 18 states have call successors, (28), 8 states have call predecessors, (28), 13 states have return successors, (34), 17 states have call predecessors, (34), 18 states have call successors, (34) [2024-11-27 19:52:48,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 19:52:48,306 INFO L93 Difference]: Finished difference Result 125 states and 146 transitions. [2024-11-27 19:52:48,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-11-27 19:52:48,307 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 30 states have (on average 2.566666666666667) internal successors, (77), 34 states have internal predecessors, (77), 18 states have call successors, (28), 8 states have call predecessors, (28), 13 states have return successors, (34), 17 states have call predecessors, (34), 18 states have call successors, (34) Word has length 888 [2024-11-27 19:52:48,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 19:52:48,308 INFO L225 Difference]: With dead ends: 125 [2024-11-27 19:52:48,308 INFO L226 Difference]: Without dead ends: 67 [2024-11-27 19:52:48,309 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 1805 GetRequests, 1757 SyntacticMatches, 3 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 865 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=443, Invalid=1719, Unknown=0, NotChecked=0, Total=2162 [2024-11-27 19:52:48,310 INFO L435 NwaCegarLoop]: 23 mSDtfsCounter, 31 mSDsluCounter, 263 mSDsCounter, 0 mSdLazyCounter, 299 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 286 SdHoareTripleChecker+Invalid, 323 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 299 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-27 19:52:48,310 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [32 Valid, 286 Invalid, 323 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 299 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-27 19:52:48,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2024-11-27 19:52:48,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 67. [2024-11-27 19:52:48,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 40 states have (on average 1.125) internal successors, (45), 42 states have internal predecessors, (45), 6 states have call successors, (6), 4 states have call predecessors, (6), 20 states have return successors, (23), 20 states have call predecessors, (23), 6 states have call successors, (23) [2024-11-27 19:52:48,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 74 transitions. [2024-11-27 19:52:48,322 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 74 transitions. Word has length 888 [2024-11-27 19:52:48,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-27 19:52:48,323 INFO L471 AbstractCegarLoop]: Abstraction has 67 states and 74 transitions. [2024-11-27 19:52:48,323 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 30 states have (on average 2.566666666666667) internal successors, (77), 34 states have internal predecessors, (77), 18 states have call successors, (28), 8 states have call predecessors, (28), 13 states have return successors, (34), 17 states have call predecessors, (34), 18 states have call successors, (34) [2024-11-27 19:52:48,327 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 74 transitions. [2024-11-27 19:52:48,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1299 [2024-11-27 19:52:48,340 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 19:52:48,341 INFO L218 NwaCegarLoop]: trace histogram [210, 210, 180, 180, 180, 35, 35, 30, 30, 30, 30, 30, 30, 30, 6, 6, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 19:52:48,355 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dab80af-618f-475b-9864-969976b18a30/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2024-11-27 19:52:48,542 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dab80af-618f-475b-9864-969976b18a30/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2024-11-27 19:52:48,542 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-27 19:52:48,543 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 19:52:48,543 INFO L85 PathProgramCache]: Analyzing trace with hash 1156230426, now seen corresponding path program 8 times [2024-11-27 19:52:48,543 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 19:52:48,543 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1007301213] [2024-11-27 19:52:48,543 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-27 19:52:48,543 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 19:52:49,113 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-27 19:52:49,113 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 19:53:06,910 INFO L134 CoverageAnalysis]: Checked inductivity of 107665 backedges. 12 proven. 51 refuted. 0 times theorem prover too weak. 107602 trivial. 0 not checked. [2024-11-27 19:53:06,911 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 19:53:06,911 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1007301213] [2024-11-27 19:53:06,911 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1007301213] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-27 19:53:06,911 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2055674045] [2024-11-27 19:53:06,911 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-27 19:53:06,911 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 19:53:06,912 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dab80af-618f-475b-9864-969976b18a30/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 19:53:06,913 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dab80af-618f-475b-9864-969976b18a30/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 19:53:06,915 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dab80af-618f-475b-9864-969976b18a30/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-11-27 19:53:08,519 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-27 19:53:08,519 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 19:53:08,545 INFO L256 TraceCheckSpWp]: Trace formula consists of 5312 conjuncts, 74 conjuncts are in the unsatisfiable core [2024-11-27 19:53:08,584 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 19:53:08,587 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 19:53:09,130 INFO L134 CoverageAnalysis]: Checked inductivity of 107665 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 107630 trivial. 0 not checked. [2024-11-27 19:53:09,131 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-27 19:53:20,273 INFO L134 CoverageAnalysis]: Checked inductivity of 107665 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 107575 trivial. 0 not checked. [2024-11-27 19:53:20,274 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2055674045] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-27 19:53:20,274 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-27 19:53:20,275 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 13, 26] total 52 [2024-11-27 19:53:20,275 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [725840276] [2024-11-27 19:53:20,275 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-27 19:53:20,278 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2024-11-27 19:53:20,278 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 19:53:20,279 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2024-11-27 19:53:20,280 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=510, Invalid=2142, Unknown=0, NotChecked=0, Total=2652 [2024-11-27 19:53:20,281 INFO L87 Difference]: Start difference. First operand 67 states and 74 transitions. Second operand has 52 states, 41 states have (on average 1.7317073170731707) internal successors, (71), 45 states have internal predecessors, (71), 20 states have call successors, (22), 8 states have call predecessors, (22), 19 states have return successors, (29), 26 states have call predecessors, (29), 20 states have call successors, (29) [2024-11-27 19:53:21,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 19:53:21,240 INFO L93 Difference]: Finished difference Result 80 states and 90 transitions. [2024-11-27 19:53:21,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-11-27 19:53:21,242 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 41 states have (on average 1.7317073170731707) internal successors, (71), 45 states have internal predecessors, (71), 20 states have call successors, (22), 8 states have call predecessors, (22), 19 states have return successors, (29), 26 states have call predecessors, (29), 20 states have call successors, (29) Word has length 1298 [2024-11-27 19:53:21,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 19:53:21,255 INFO L225 Difference]: With dead ends: 80 [2024-11-27 19:53:21,256 INFO L226 Difference]: Without dead ends: 71 [2024-11-27 19:53:21,257 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 2631 GetRequests, 2575 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1288 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=657, Invalid=2649, Unknown=0, NotChecked=0, Total=3306 [2024-11-27 19:53:21,258 INFO L435 NwaCegarLoop]: 19 mSDtfsCounter, 64 mSDsluCounter, 233 mSDsCounter, 0 mSdLazyCounter, 469 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 252 SdHoareTripleChecker+Invalid, 511 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 469 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-11-27 19:53:21,262 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [67 Valid, 252 Invalid, 511 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 469 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-11-27 19:53:21,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2024-11-27 19:53:21,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 69. [2024-11-27 19:53:21,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 41 states have (on average 1.1219512195121952) internal successors, (46), 43 states have internal predecessors, (46), 6 states have call successors, (6), 4 states have call predecessors, (6), 21 states have return successors, (24), 21 states have call predecessors, (24), 6 states have call successors, (24) [2024-11-27 19:53:21,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 76 transitions. [2024-11-27 19:53:21,284 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 76 transitions. Word has length 1298 [2024-11-27 19:53:21,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-27 19:53:21,291 INFO L471 AbstractCegarLoop]: Abstraction has 69 states and 76 transitions. [2024-11-27 19:53:21,292 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 41 states have (on average 1.7317073170731707) internal successors, (71), 45 states have internal predecessors, (71), 20 states have call successors, (22), 8 states have call predecessors, (22), 19 states have return successors, (29), 26 states have call predecessors, (29), 20 states have call successors, (29) [2024-11-27 19:53:21,292 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 76 transitions. [2024-11-27 19:53:21,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1556 [2024-11-27 19:53:21,320 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 19:53:21,321 INFO L218 NwaCegarLoop]: trace histogram [252, 252, 216, 216, 216, 42, 42, 36, 36, 36, 36, 36, 36, 36, 7, 7, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 19:53:21,350 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dab80af-618f-475b-9864-969976b18a30/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2024-11-27 19:53:21,521 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dab80af-618f-475b-9864-969976b18a30/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 19:53:21,522 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-27 19:53:21,523 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 19:53:21,523 INFO L85 PathProgramCache]: Analyzing trace with hash 1124760959, now seen corresponding path program 9 times [2024-11-27 19:53:21,523 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 19:53:21,523 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2132744781] [2024-11-27 19:53:21,524 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-27 19:53:21,524 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 19:53:23,860 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 86 check-sat command(s) [2024-11-27 19:53:23,860 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 19:53:45,491 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-11-27 19:53:45,493 FATAL L? ?]: The Plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction has thrown an exception: java.lang.AssertionError at de.uni_freiburg.informatik.ultimate.smtinterpol.interpolate.InterpolantChecker.checkInductivity(InterpolantChecker.java:409) at de.uni_freiburg.informatik.ultimate.smtinterpol.interpolate.Interpolator.walkLeafNode(Interpolator.java:395) at de.uni_freiburg.informatik.ultimate.smtinterpol.interpolate.Interpolator$ProofTreeWalker.walk(Interpolator.java:154) at de.uni_freiburg.informatik.ultimate.logic.NonRecursive.run(NonRecursive.java:115) at de.uni_freiburg.informatik.ultimate.logic.NonRecursive.run(NonRecursive.java:106) at de.uni_freiburg.informatik.ultimate.smtinterpol.interpolate.Interpolator.interpolate(Interpolator.java:260) at de.uni_freiburg.informatik.ultimate.smtinterpol.interpolate.Interpolator.getInterpolants(Interpolator.java:237) at de.uni_freiburg.informatik.ultimate.smtinterpol.smtlib2.SMTInterpol.getInterpolants(SMTInterpol.java:871) at de.uni_freiburg.informatik.ultimate.smtinterpol.smtlib2.SMTInterpol.getInterpolants(SMTInterpol.java:795) at de.uni_freiburg.informatik.ultimate.logic.WrapperScript.getInterpolants(WrapperScript.java:343) at de.uni_freiburg.informatik.ultimate.logic.WrapperScript.getInterpolants(WrapperScript.java:343) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.ManagedScript.getInterpolants(ManagedScript.java:207) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.NestedInterpolantsBuilder.(NestedInterpolantsBuilder.java:155) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.InterpolatingTraceCheckCraig.computeInterpolantsTree(InterpolatingTraceCheckCraig.java:292) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.InterpolatingTraceCheckCraig.computeInterpolants(InterpolatingTraceCheckCraig.java:227) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.InterpolatingTraceCheckCraig.(InterpolatingTraceCheckCraig.java:98) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleCraig.construct(IpTcStrategyModuleCraig.java:75) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleCraig.construct(IpTcStrategyModuleCraig.java:1) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.isCorrect(IpTcStrategyModuleBase.java:57) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.checkFeasibility(AutomatonFreeRefinementEngine.java:210) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:121) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:317) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:407) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:342) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:324) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:428) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:314) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:275) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:167) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:140) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:132) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:167) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:150) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:127) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:233) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:227) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:144) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:106) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:319) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2024-11-27 19:53:45,504 INFO L158 Benchmark]: Toolchain (without parser) took 149708.44ms. Allocated memory was 117.4MB in the beginning and 369.1MB in the end (delta: 251.7MB). Free memory was 92.0MB in the beginning and 229.7MB in the end (delta: -137.7MB). Peak memory consumption was 1.3GB. Max. memory is 16.1GB. [2024-11-27 19:53:45,504 INFO L158 Benchmark]: CDTParser took 0.46ms. Allocated memory is still 117.4MB. Free memory is still 72.5MB. There was no memory consumed. Max. memory is 16.1GB. [2024-11-27 19:53:45,505 INFO L158 Benchmark]: CACSL2BoogieTranslator took 254.93ms. Allocated memory is still 117.4MB. Free memory was 91.8MB in the beginning and 81.1MB in the end (delta: 10.8MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2024-11-27 19:53:45,505 INFO L158 Benchmark]: Boogie Procedure Inliner took 44.45ms. Allocated memory is still 117.4MB. Free memory was 81.1MB in the beginning and 80.0MB in the end (delta: 1.1MB). There was no memory consumed. Max. memory is 16.1GB. [2024-11-27 19:53:45,505 INFO L158 Benchmark]: Boogie Preprocessor took 53.17ms. Allocated memory is still 117.4MB. Free memory was 80.0MB in the beginning and 78.3MB in the end (delta: 1.6MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2024-11-27 19:53:45,506 INFO L158 Benchmark]: RCFGBuilder took 471.39ms. Allocated memory is still 117.4MB. Free memory was 78.3MB in the beginning and 65.8MB in the end (delta: 12.5MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2024-11-27 19:53:45,506 INFO L158 Benchmark]: TraceAbstraction took 148877.46ms. Allocated memory was 117.4MB in the beginning and 369.1MB in the end (delta: 251.7MB). Free memory was 65.3MB in the beginning and 229.7MB in the end (delta: -164.4MB). Peak memory consumption was 1.3GB. Max. memory is 16.1GB. [2024-11-27 19:53:45,510 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.46ms. Allocated memory is still 117.4MB. Free memory is still 72.5MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 254.93ms. Allocated memory is still 117.4MB. Free memory was 91.8MB in the beginning and 81.1MB in the end (delta: 10.8MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 44.45ms. Allocated memory is still 117.4MB. Free memory was 81.1MB in the beginning and 80.0MB in the end (delta: 1.1MB). There was no memory consumed. Max. memory is 16.1GB. * Boogie Preprocessor took 53.17ms. Allocated memory is still 117.4MB. Free memory was 80.0MB in the beginning and 78.3MB in the end (delta: 1.6MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * RCFGBuilder took 471.39ms. Allocated memory is still 117.4MB. Free memory was 78.3MB in the beginning and 65.8MB in the end (delta: 12.5MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * TraceAbstraction took 148877.46ms. Allocated memory was 117.4MB in the beginning and 369.1MB in the end (delta: 251.7MB). Free memory was 65.3MB in the beginning and 229.7MB in the end (delta: -164.4MB). Peak memory consumption was 1.3GB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: AssertionError: null de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: AssertionError: null: de.uni_freiburg.informatik.ultimate.smtinterpol.interpolate.InterpolantChecker.checkInductivity(InterpolantChecker.java:409) RESULT: Ultimate could not prove your program: Toolchain returned no result. [2024-11-27 19:53:45,560 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dab80af-618f-475b-9864-969976b18a30/bin/uautomizer-verify-aQ6SnzHsRB/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Ended with exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dab80af-618f-475b-9864-969976b18a30/bin/uautomizer-verify-aQ6SnzHsRB/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dab80af-618f-475b-9864-969976b18a30/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_5dab80af-618f-475b-9864-969976b18a30/bin/uautomizer-verify-aQ6SnzHsRB/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dab80af-618f-475b-9864-969976b18a30/bin/uautomizer-verify-aQ6SnzHsRB/config/AutomizerReach.xml -i ../../sv-benchmarks/c/recursified_loop-simple/recursified_nested_3.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dab80af-618f-475b-9864-969976b18a30/bin/uautomizer-verify-aQ6SnzHsRB/config/svcomp-Reach-32bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dab80af-618f-475b-9864-969976b18a30/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 9a8e2b8a66923dd7d46d9db92fbd8b38c75eb8108da5237ec87b15cd1ae67985 --- Real Ultimate output --- This is Ultimate 0.3.0-dev-d790fec [2024-11-27 19:53:48,301 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-27 19:53:48,433 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dab80af-618f-475b-9864-969976b18a30/bin/uautomizer-verify-aQ6SnzHsRB/config/svcomp-Reach-32bit-Automizer_Bitvector.epf [2024-11-27 19:53:48,443 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-27 19:53:48,443 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-27 19:53:48,466 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-27 19:53:48,467 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-27 19:53:48,467 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-27 19:53:48,468 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-27 19:53:48,468 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-27 19:53:48,468 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-27 19:53:48,468 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-27 19:53:48,468 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-27 19:53:48,469 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-27 19:53:48,469 INFO L153 SettingsManager]: * Use SBE=true [2024-11-27 19:53:48,469 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-27 19:53:48,469 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-27 19:53:48,469 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-27 19:53:48,469 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-27 19:53:48,470 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-27 19:53:48,470 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-27 19:53:48,470 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-27 19:53:48,470 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-27 19:53:48,470 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-11-27 19:53:48,470 INFO L153 SettingsManager]: * Use bitvectors instead of ints=true [2024-11-27 19:53:48,470 INFO L153 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2024-11-27 19:53:48,471 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-27 19:53:48,471 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-27 19:53:48,471 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2024-11-27 19:53:48,471 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-27 19:53:48,471 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2024-11-27 19:53:48,471 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-27 19:53:48,471 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-27 19:53:48,471 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-27 19:53:48,472 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-27 19:53:48,472 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-27 19:53:48,472 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-27 19:53:48,472 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-27 19:53:48,472 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-27 19:53:48,472 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-27 19:53:48,472 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-27 19:53:48,472 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-27 19:53:48,473 INFO L153 SettingsManager]: * Compute procedure contracts=false [2024-11-27 19:53:48,473 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-27 19:53:48,473 INFO L153 SettingsManager]: * Trace refinement strategy=FOX [2024-11-27 19:53:48,473 INFO L153 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2024-11-27 19:53:48,473 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-27 19:53:48,473 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-27 19:53:48,474 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-27 19:53:48,474 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-27 19:53:48,474 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_5dab80af-618f-475b-9864-969976b18a30/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 -> 9a8e2b8a66923dd7d46d9db92fbd8b38c75eb8108da5237ec87b15cd1ae67985 [2024-11-27 19:53:48,828 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-27 19:53:48,837 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-27 19:53:48,839 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-27 19:53:48,841 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-27 19:53:48,841 INFO L274 PluginConnector]: CDTParser initialized [2024-11-27 19:53:48,843 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dab80af-618f-475b-9864-969976b18a30/bin/uautomizer-verify-aQ6SnzHsRB/../../sv-benchmarks/c/recursified_loop-simple/recursified_nested_3.c [2024-11-27 19:53:52,276 INFO L533 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dab80af-618f-475b-9864-969976b18a30/bin/uautomizer-verify-aQ6SnzHsRB/data/3d8e40c6c/051408c139ea49cca120dadf86ad957b/FLAG9e43dc76e [2024-11-27 19:53:52,594 INFO L384 CDTParser]: Found 1 translation units. [2024-11-27 19:53:52,595 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dab80af-618f-475b-9864-969976b18a30/sv-benchmarks/c/recursified_loop-simple/recursified_nested_3.c [2024-11-27 19:53:52,607 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dab80af-618f-475b-9864-969976b18a30/bin/uautomizer-verify-aQ6SnzHsRB/data/3d8e40c6c/051408c139ea49cca120dadf86ad957b/FLAG9e43dc76e [2024-11-27 19:53:52,637 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dab80af-618f-475b-9864-969976b18a30/bin/uautomizer-verify-aQ6SnzHsRB/data/3d8e40c6c/051408c139ea49cca120dadf86ad957b [2024-11-27 19:53:52,643 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-27 19:53:52,649 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-27 19:53:52,651 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-27 19:53:52,651 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-27 19:53:52,658 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-27 19:53:52,659 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.11 07:53:52" (1/1) ... [2024-11-27 19:53:52,661 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@99be508 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 07:53:52, skipping insertion in model container [2024-11-27 19:53:52,661 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.11 07:53:52" (1/1) ... [2024-11-27 19:53:52,683 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-27 19:53:52,913 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_5dab80af-618f-475b-9864-969976b18a30/sv-benchmarks/c/recursified_loop-simple/recursified_nested_3.c[1963,1976] [2024-11-27 19:53:52,918 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-27 19:53:52,934 INFO L200 MainTranslator]: Completed pre-run [2024-11-27 19:53:52,957 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_5dab80af-618f-475b-9864-969976b18a30/sv-benchmarks/c/recursified_loop-simple/recursified_nested_3.c[1963,1976] [2024-11-27 19:53:52,958 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-27 19:53:52,981 INFO L204 MainTranslator]: Completed translation [2024-11-27 19:53:52,982 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 07:53:52 WrapperNode [2024-11-27 19:53:52,982 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-27 19:53:52,984 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-27 19:53:52,986 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-27 19:53:52,986 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-27 19:53:52,997 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 07:53:52" (1/1) ... [2024-11-27 19:53:53,009 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 07:53:52" (1/1) ... [2024-11-27 19:53:53,035 INFO L138 Inliner]: procedures = 17, calls = 40, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 52 [2024-11-27 19:53:53,037 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-27 19:53:53,039 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-27 19:53:53,039 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-27 19:53:53,039 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-27 19:53:53,050 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 07:53:52" (1/1) ... [2024-11-27 19:53:53,050 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 07:53:52" (1/1) ... [2024-11-27 19:53:53,053 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 07:53:52" (1/1) ... [2024-11-27 19:53:53,085 INFO L175 MemorySlicer]: Split 20 memory accesses to 4 slices as follows [2, 6, 6, 6]. 30 percent of accesses are in the largest equivalence class. The 5 initializations are split as follows [2, 1, 1, 1]. The 6 writes are split as follows [0, 2, 2, 2]. [2024-11-27 19:53:53,088 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 07:53:52" (1/1) ... [2024-11-27 19:53:53,089 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 07:53:52" (1/1) ... [2024-11-27 19:53:53,105 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 07:53:52" (1/1) ... [2024-11-27 19:53:53,106 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 07:53:52" (1/1) ... [2024-11-27 19:53:53,108 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 07:53:52" (1/1) ... [2024-11-27 19:53:53,114 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 07:53:52" (1/1) ... [2024-11-27 19:53:53,115 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 07:53:52" (1/1) ... [2024-11-27 19:53:53,122 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-27 19:53:53,123 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-27 19:53:53,127 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-27 19:53:53,128 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-27 19:53:53,129 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 07:53:52" (1/1) ... [2024-11-27 19:53:53,140 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-27 19:53:53,158 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dab80af-618f-475b-9864-969976b18a30/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 19:53:53,172 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dab80af-618f-475b-9864-969976b18a30/bin/uautomizer-verify-aQ6SnzHsRB/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-11-27 19:53:53,176 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dab80af-618f-475b-9864-969976b18a30/bin/uautomizer-verify-aQ6SnzHsRB/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-11-27 19:53:53,210 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-27 19:53:53,210 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1#0 [2024-11-27 19:53:53,210 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1#1 [2024-11-27 19:53:53,211 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1#2 [2024-11-27 19:53:53,212 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1#3 [2024-11-27 19:53:53,213 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE4#0 [2024-11-27 19:53:53,213 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE4#1 [2024-11-27 19:53:53,213 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE4#2 [2024-11-27 19:53:53,213 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE4#3 [2024-11-27 19:53:53,213 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-11-27 19:53:53,213 INFO L130 BoogieDeclarations]: Found specification of procedure func_to_recursive_line_23_to_23_0 [2024-11-27 19:53:53,213 INFO L138 BoogieDeclarations]: Found implementation of procedure func_to_recursive_line_23_to_23_0 [2024-11-27 19:53:53,214 INFO L130 BoogieDeclarations]: Found specification of procedure func_to_recursive_line_22_to_23_0 [2024-11-27 19:53:53,214 INFO L138 BoogieDeclarations]: Found implementation of procedure func_to_recursive_line_22_to_23_0 [2024-11-27 19:53:53,214 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4#0 [2024-11-27 19:53:53,214 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4#1 [2024-11-27 19:53:53,214 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4#2 [2024-11-27 19:53:53,214 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4#3 [2024-11-27 19:53:53,214 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-27 19:53:53,214 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-27 19:53:53,214 INFO L130 BoogieDeclarations]: Found specification of procedure func_to_recursive_line_21_to_22_0 [2024-11-27 19:53:53,215 INFO L138 BoogieDeclarations]: Found implementation of procedure func_to_recursive_line_21_to_22_0 [2024-11-27 19:53:53,215 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-11-27 19:53:53,215 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4#0 [2024-11-27 19:53:53,215 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4#1 [2024-11-27 19:53:53,215 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4#2 [2024-11-27 19:53:53,215 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4#3 [2024-11-27 19:53:53,327 INFO L234 CfgBuilder]: Building ICFG [2024-11-27 19:53:53,330 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-27 19:53:53,631 INFO L? ?]: Removed 9 outVars from TransFormulas that were not future-live. [2024-11-27 19:53:53,631 INFO L283 CfgBuilder]: Performing block encoding [2024-11-27 19:53:53,643 INFO L307 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-27 19:53:53,644 INFO L312 CfgBuilder]: Removed 0 assume(true) statements. [2024-11-27 19:53:53,644 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.11 07:53:53 BoogieIcfgContainer [2024-11-27 19:53:53,645 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-27 19:53:53,648 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-27 19:53:53,648 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-27 19:53:53,655 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-27 19:53:53,656 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.11 07:53:52" (1/3) ... [2024-11-27 19:53:53,657 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@29786a81 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.11 07:53:53, skipping insertion in model container [2024-11-27 19:53:53,657 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 07:53:52" (2/3) ... [2024-11-27 19:53:53,657 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@29786a81 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.11 07:53:53, skipping insertion in model container [2024-11-27 19:53:53,657 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.11 07:53:53" (3/3) ... [2024-11-27 19:53:53,659 INFO L128 eAbstractionObserver]: Analyzing ICFG recursified_nested_3.c [2024-11-27 19:53:53,681 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-27 19:53:53,683 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG recursified_nested_3.c that has 4 procedures, 33 locations, 1 initial locations, 0 loop locations, and 1 error locations. [2024-11-27 19:53:53,758 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-27 19:53:53,780 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;@77131e41, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-27 19:53:53,780 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-11-27 19:53:53,787 INFO L276 IsEmpty]: Start isEmpty. Operand has 33 states, 22 states have (on average 1.3181818181818181) internal successors, (29), 26 states have internal predecessors, (29), 6 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2024-11-27 19:53:53,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2024-11-27 19:53:53,803 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 19:53:53,804 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 19:53:53,804 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-27 19:53:53,812 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 19:53:53,812 INFO L85 PathProgramCache]: Analyzing trace with hash 58732503, now seen corresponding path program 1 times [2024-11-27 19:53:53,827 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-27 19:53:53,827 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [561724267] [2024-11-27 19:53:53,828 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 19:53:53,828 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 19:53:53,828 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dab80af-618f-475b-9864-969976b18a30/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 19:53:53,833 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dab80af-618f-475b-9864-969976b18a30/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 19:53:53,835 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dab80af-618f-475b-9864-969976b18a30/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-27 19:53:54,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 19:53:54,056 INFO L256 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-11-27 19:53:54,063 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 19:53:54,125 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 19:53:54,275 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 19:53:54,275 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-27 19:53:54,276 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-27 19:53:54,276 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [561724267] [2024-11-27 19:53:54,277 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [561724267] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-27 19:53:54,277 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-27 19:53:54,277 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-27 19:53:54,280 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1919592093] [2024-11-27 19:53:54,281 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-27 19:53:54,286 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-27 19:53:54,287 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-27 19:53:54,320 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-27 19:53:54,320 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-27 19:53:54,324 INFO L87 Difference]: Start difference. First operand has 33 states, 22 states have (on average 1.3181818181818181) internal successors, (29), 26 states have internal predecessors, (29), 6 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Second operand has 5 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 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 19:53:54,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 19:53:54,615 INFO L93 Difference]: Finished difference Result 47 states and 58 transitions. [2024-11-27 19:53:54,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-27 19:53:54,619 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 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 13 [2024-11-27 19:53:54,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 19:53:54,627 INFO L225 Difference]: With dead ends: 47 [2024-11-27 19:53:54,628 INFO L226 Difference]: Without dead ends: 34 [2024-11-27 19:53:54,631 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-27 19:53:54,635 INFO L435 NwaCegarLoop]: 18 mSDtfsCounter, 14 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 82 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 85 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 82 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-27 19:53:54,638 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 54 Invalid, 85 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 82 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-27 19:53:54,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2024-11-27 19:53:54,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 33. [2024-11-27 19:53:54,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 22 states have (on average 1.2272727272727273) internal successors, (27), 24 states have internal predecessors, (27), 6 states have call successors, (6), 3 states have call predecessors, (6), 4 states have return successors, (8), 7 states have call predecessors, (8), 6 states have call successors, (8) [2024-11-27 19:53:54,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 41 transitions. [2024-11-27 19:53:54,686 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 41 transitions. Word has length 13 [2024-11-27 19:53:54,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-27 19:53:54,687 INFO L471 AbstractCegarLoop]: Abstraction has 33 states and 41 transitions. [2024-11-27 19:53:54,687 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 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 19:53:54,687 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 41 transitions. [2024-11-27 19:53:54,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2024-11-27 19:53:54,689 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 19:53:54,689 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 19:53:54,698 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dab80af-618f-475b-9864-969976b18a30/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-27 19:53:54,890 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dab80af-618f-475b-9864-969976b18a30/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 19:53:54,890 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-27 19:53:54,891 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 19:53:54,891 INFO L85 PathProgramCache]: Analyzing trace with hash 60579545, now seen corresponding path program 1 times [2024-11-27 19:53:54,891 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-27 19:53:54,891 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2130599204] [2024-11-27 19:53:54,892 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 19:53:54,892 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 19:53:54,892 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dab80af-618f-475b-9864-969976b18a30/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 19:53:54,896 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dab80af-618f-475b-9864-969976b18a30/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 19:53:54,897 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dab80af-618f-475b-9864-969976b18a30/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-27 19:53:54,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 19:53:54,986 INFO L256 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-11-27 19:53:54,988 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 19:53:55,009 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 19:53:55,009 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-27 19:53:55,009 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-27 19:53:55,009 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2130599204] [2024-11-27 19:53:55,010 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2130599204] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-27 19:53:55,010 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-27 19:53:55,010 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-27 19:53:55,010 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1256305535] [2024-11-27 19:53:55,010 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-27 19:53:55,012 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-27 19:53:55,012 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-27 19:53:55,013 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-27 19:53:55,013 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-27 19:53:55,013 INFO L87 Difference]: Start difference. First operand 33 states and 41 transitions. Second operand has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 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 19:53:55,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 19:53:55,064 INFO L93 Difference]: Finished difference Result 39 states and 47 transitions. [2024-11-27 19:53:55,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-27 19:53:55,065 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 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 13 [2024-11-27 19:53:55,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 19:53:55,067 INFO L225 Difference]: With dead ends: 39 [2024-11-27 19:53:55,069 INFO L226 Difference]: Without dead ends: 36 [2024-11-27 19:53:55,070 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 10 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 19:53:55,071 INFO L435 NwaCegarLoop]: 33 mSDtfsCounter, 1 mSDsluCounter, 60 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 93 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-27 19:53:55,072 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 93 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-27 19:53:55,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2024-11-27 19:53:55,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 35. [2024-11-27 19:53:55,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 24 states have (on average 1.2083333333333333) internal successors, (29), 26 states have internal predecessors, (29), 6 states have call successors, (6), 3 states have call predecessors, (6), 4 states have return successors, (8), 7 states have call predecessors, (8), 6 states have call successors, (8) [2024-11-27 19:53:55,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 43 transitions. [2024-11-27 19:53:55,087 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 43 transitions. Word has length 13 [2024-11-27 19:53:55,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-27 19:53:55,087 INFO L471 AbstractCegarLoop]: Abstraction has 35 states and 43 transitions. [2024-11-27 19:53:55,087 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 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 19:53:55,089 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 43 transitions. [2024-11-27 19:53:55,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2024-11-27 19:53:55,090 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 19:53:55,090 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 19:53:55,103 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dab80af-618f-475b-9864-969976b18a30/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-11-27 19:53:55,296 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dab80af-618f-475b-9864-969976b18a30/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 19:53:55,296 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-27 19:53:55,297 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 19:53:55,297 INFO L85 PathProgramCache]: Analyzing trace with hash 60581467, now seen corresponding path program 1 times [2024-11-27 19:53:55,297 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-27 19:53:55,297 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [95608686] [2024-11-27 19:53:55,297 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 19:53:55,297 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 19:53:55,298 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dab80af-618f-475b-9864-969976b18a30/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 19:53:55,302 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dab80af-618f-475b-9864-969976b18a30/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 19:53:55,307 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dab80af-618f-475b-9864-969976b18a30/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-27 19:53:55,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 19:53:55,402 INFO L256 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-11-27 19:53:55,408 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 19:53:55,418 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 19:53:55,549 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 19:53:55,549 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-27 19:53:55,550 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-27 19:53:55,550 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [95608686] [2024-11-27 19:53:55,550 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [95608686] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-27 19:53:55,550 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-27 19:53:55,550 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-11-27 19:53:55,550 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1674957879] [2024-11-27 19:53:55,550 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-27 19:53:55,550 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-27 19:53:55,551 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-27 19:53:55,551 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-27 19:53:55,551 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-11-27 19:53:55,551 INFO L87 Difference]: Start difference. First operand 35 states and 43 transitions. Second operand has 6 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 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 19:53:55,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 19:53:55,793 INFO L93 Difference]: Finished difference Result 40 states and 47 transitions. [2024-11-27 19:53:55,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-27 19:53:55,794 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 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 13 [2024-11-27 19:53:55,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 19:53:55,795 INFO L225 Difference]: With dead ends: 40 [2024-11-27 19:53:55,796 INFO L226 Difference]: Without dead ends: 33 [2024-11-27 19:53:55,796 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-11-27 19:53:55,797 INFO L435 NwaCegarLoop]: 15 mSDtfsCounter, 13 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 92 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 94 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 92 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-27 19:53:55,798 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 36 Invalid, 94 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 92 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-27 19:53:55,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2024-11-27 19:53:55,804 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2024-11-27 19:53:55,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 22 states have (on average 1.2272727272727273) internal successors, (27), 25 states have internal predecessors, (27), 6 states have call successors, (6), 3 states have call predecessors, (6), 4 states have return successors, (7), 6 states have call predecessors, (7), 6 states have call successors, (7) [2024-11-27 19:53:55,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 40 transitions. [2024-11-27 19:53:55,806 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 40 transitions. Word has length 13 [2024-11-27 19:53:55,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-27 19:53:55,806 INFO L471 AbstractCegarLoop]: Abstraction has 33 states and 40 transitions. [2024-11-27 19:53:55,806 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 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 19:53:55,807 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 40 transitions. [2024-11-27 19:53:55,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2024-11-27 19:53:55,808 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 19:53:55,808 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] [2024-11-27 19:53:55,820 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dab80af-618f-475b-9864-969976b18a30/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-11-27 19:53:56,008 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dab80af-618f-475b-9864-969976b18a30/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 19:53:56,009 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-27 19:53:56,010 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 19:53:56,010 INFO L85 PathProgramCache]: Analyzing trace with hash -1518425104, now seen corresponding path program 1 times [2024-11-27 19:53:56,010 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-27 19:53:56,011 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [188563381] [2024-11-27 19:53:56,011 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 19:53:56,011 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 19:53:56,011 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dab80af-618f-475b-9864-969976b18a30/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 19:53:56,013 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dab80af-618f-475b-9864-969976b18a30/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 19:53:56,017 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dab80af-618f-475b-9864-969976b18a30/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-27 19:53:56,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 19:53:56,157 INFO L256 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-11-27 19:53:56,163 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 19:53:56,198 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 19:53:56,365 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-27 19:53:56,365 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-27 19:53:57,007 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 16 treesize of output 12 [2024-11-27 19:53:57,020 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-27 19:53:57,020 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-27 19:53:57,020 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [188563381] [2024-11-27 19:53:57,020 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [188563381] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-27 19:53:57,021 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-27 19:53:57,021 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2024-11-27 19:53:57,021 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1912670692] [2024-11-27 19:53:57,021 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-27 19:53:57,021 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-27 19:53:57,022 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-27 19:53:57,022 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-27 19:53:57,023 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2024-11-27 19:53:57,023 INFO L87 Difference]: Start difference. First operand 33 states and 40 transitions. Second operand has 11 states, 11 states have (on average 2.6363636363636362) internal successors, (29), 11 states have internal predecessors, (29), 3 states have call successors, (5), 3 states have call predecessors, (5), 4 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2024-11-27 19:53:57,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 19:53:57,841 INFO L93 Difference]: Finished difference Result 63 states and 82 transitions. [2024-11-27 19:53:57,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-11-27 19:53:57,842 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.6363636363636362) internal successors, (29), 11 states have internal predecessors, (29), 3 states have call successors, (5), 3 states have call predecessors, (5), 4 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) Word has length 24 [2024-11-27 19:53:57,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 19:53:57,844 INFO L225 Difference]: With dead ends: 63 [2024-11-27 19:53:57,844 INFO L226 Difference]: Without dead ends: 60 [2024-11-27 19:53:57,845 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 36 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=66, Invalid=240, Unknown=0, NotChecked=0, Total=306 [2024-11-27 19:53:57,846 INFO L435 NwaCegarLoop]: 25 mSDtfsCounter, 25 mSDsluCounter, 122 mSDsCounter, 0 mSdLazyCounter, 219 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 147 SdHoareTripleChecker+Invalid, 244 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 219 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-11-27 19:53:57,846 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 147 Invalid, 244 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 219 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-11-27 19:53:57,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2024-11-27 19:53:57,863 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 50. [2024-11-27 19:53:57,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 32 states have (on average 1.21875) internal successors, (39), 35 states have internal predecessors, (39), 9 states have call successors, (9), 4 states have call predecessors, (9), 8 states have return successors, (21), 12 states have call predecessors, (21), 9 states have call successors, (21) [2024-11-27 19:53:57,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 69 transitions. [2024-11-27 19:53:57,866 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 69 transitions. Word has length 24 [2024-11-27 19:53:57,866 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-27 19:53:57,866 INFO L471 AbstractCegarLoop]: Abstraction has 50 states and 69 transitions. [2024-11-27 19:53:57,867 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.6363636363636362) internal successors, (29), 11 states have internal predecessors, (29), 3 states have call successors, (5), 3 states have call predecessors, (5), 4 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2024-11-27 19:53:57,867 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 69 transitions. [2024-11-27 19:53:57,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2024-11-27 19:53:57,868 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 19:53:57,868 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] [2024-11-27 19:53:57,881 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dab80af-618f-475b-9864-969976b18a30/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-11-27 19:53:58,073 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dab80af-618f-475b-9864-969976b18a30/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 19:53:58,073 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-27 19:53:58,074 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 19:53:58,074 INFO L85 PathProgramCache]: Analyzing trace with hash -1518423182, now seen corresponding path program 1 times [2024-11-27 19:53:58,074 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-27 19:53:58,074 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [838083478] [2024-11-27 19:53:58,074 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 19:53:58,075 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 19:53:58,075 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dab80af-618f-475b-9864-969976b18a30/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 19:53:58,079 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dab80af-618f-475b-9864-969976b18a30/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 19:53:58,081 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dab80af-618f-475b-9864-969976b18a30/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-27 19:53:58,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 19:53:58,196 INFO L256 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-11-27 19:53:58,203 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 19:53:58,212 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 19:53:58,406 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 19 treesize of output 11 [2024-11-27 19:53:58,462 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-27 19:53:58,462 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-27 19:53:58,781 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 7 treesize of output 3 [2024-11-27 19:53:59,064 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-27 19:53:59,064 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-27 19:53:59,064 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [838083478] [2024-11-27 19:53:59,064 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [838083478] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-27 19:53:59,065 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-27 19:53:59,065 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 14 [2024-11-27 19:53:59,065 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1422621585] [2024-11-27 19:53:59,065 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-27 19:53:59,065 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-11-27 19:53:59,066 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-27 19:53:59,066 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-11-27 19:53:59,066 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2024-11-27 19:53:59,067 INFO L87 Difference]: Start difference. First operand 50 states and 69 transitions. Second operand has 14 states, 12 states have (on average 2.25) internal successors, (27), 11 states have internal predecessors, (27), 6 states have call successors, (6), 4 states have call predecessors, (6), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2024-11-27 19:53:59,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 19:53:59,639 INFO L93 Difference]: Finished difference Result 77 states and 106 transitions. [2024-11-27 19:53:59,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-27 19:53:59,642 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 12 states have (on average 2.25) internal successors, (27), 11 states have internal predecessors, (27), 6 states have call successors, (6), 4 states have call predecessors, (6), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Word has length 24 [2024-11-27 19:53:59,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 19:53:59,644 INFO L225 Difference]: With dead ends: 77 [2024-11-27 19:53:59,644 INFO L226 Difference]: Without dead ends: 68 [2024-11-27 19:53:59,645 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2024-11-27 19:53:59,646 INFO L435 NwaCegarLoop]: 14 mSDtfsCounter, 42 mSDsluCounter, 69 mSDsCounter, 0 mSdLazyCounter, 200 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 83 SdHoareTripleChecker+Invalid, 222 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 200 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-11-27 19:53:59,646 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [45 Valid, 83 Invalid, 222 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 200 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-11-27 19:53:59,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2024-11-27 19:53:59,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 60. [2024-11-27 19:53:59,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 39 states have (on average 1.1794871794871795) internal successors, (46), 40 states have internal predecessors, (46), 9 states have call successors, (9), 5 states have call predecessors, (9), 11 states have return successors, (29), 15 states have call predecessors, (29), 9 states have call successors, (29) [2024-11-27 19:53:59,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 84 transitions. [2024-11-27 19:53:59,679 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 84 transitions. Word has length 24 [2024-11-27 19:53:59,679 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-27 19:53:59,679 INFO L471 AbstractCegarLoop]: Abstraction has 60 states and 84 transitions. [2024-11-27 19:53:59,680 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 12 states have (on average 2.25) internal successors, (27), 11 states have internal predecessors, (27), 6 states have call successors, (6), 4 states have call predecessors, (6), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2024-11-27 19:53:59,680 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 84 transitions. [2024-11-27 19:53:59,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2024-11-27 19:53:59,682 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 19:53:59,683 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] [2024-11-27 19:53:59,693 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dab80af-618f-475b-9864-969976b18a30/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2024-11-27 19:53:59,883 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dab80af-618f-475b-9864-969976b18a30/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 19:53:59,883 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-27 19:53:59,884 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 19:53:59,884 INFO L85 PathProgramCache]: Analyzing trace with hash -1516576140, now seen corresponding path program 1 times [2024-11-27 19:53:59,885 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-27 19:53:59,885 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [346003067] [2024-11-27 19:53:59,885 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 19:53:59,885 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 19:53:59,885 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dab80af-618f-475b-9864-969976b18a30/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 19:53:59,889 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dab80af-618f-475b-9864-969976b18a30/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 19:53:59,892 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dab80af-618f-475b-9864-969976b18a30/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-27 19:53:59,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 19:53:59,988 INFO L256 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-11-27 19:53:59,991 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 19:54:00,001 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 19:54:00,099 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 19:54:00,100 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-27 19:54:00,100 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-27 19:54:00,100 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [346003067] [2024-11-27 19:54:00,100 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [346003067] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-27 19:54:00,100 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-27 19:54:00,100 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-11-27 19:54:00,100 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1336130224] [2024-11-27 19:54:00,101 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-27 19:54:00,102 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-27 19:54:00,102 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-27 19:54:00,103 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-27 19:54:00,103 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-11-27 19:54:00,103 INFO L87 Difference]: Start difference. First operand 60 states and 84 transitions. Second operand has 6 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (3), 1 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-27 19:54:00,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 19:54:00,304 INFO L93 Difference]: Finished difference Result 96 states and 132 transitions. [2024-11-27 19:54:00,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-27 19:54:00,305 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (3), 1 states have call predecessors, (3), 3 states have call successors, (3) Word has length 24 [2024-11-27 19:54:00,306 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 19:54:00,307 INFO L225 Difference]: With dead ends: 96 [2024-11-27 19:54:00,307 INFO L226 Difference]: Without dead ends: 41 [2024-11-27 19:54:00,308 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-11-27 19:54:00,309 INFO L435 NwaCegarLoop]: 23 mSDtfsCounter, 9 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 71 SdHoareTripleChecker+Invalid, 76 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-27 19:54:00,310 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 71 Invalid, 76 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-27 19:54:00,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2024-11-27 19:54:00,320 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2024-11-27 19:54:00,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 28 states have (on average 1.1785714285714286) internal successors, (33), 29 states have internal predecessors, (33), 6 states have call successors, (6), 4 states have call predecessors, (6), 6 states have return successors, (10), 8 states have call predecessors, (10), 6 states have call successors, (10) [2024-11-27 19:54:00,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 49 transitions. [2024-11-27 19:54:00,322 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 49 transitions. Word has length 24 [2024-11-27 19:54:00,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-27 19:54:00,322 INFO L471 AbstractCegarLoop]: Abstraction has 41 states and 49 transitions. [2024-11-27 19:54:00,323 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (3), 1 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-27 19:54:00,323 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 49 transitions. [2024-11-27 19:54:00,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2024-11-27 19:54:00,324 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 19:54:00,324 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] [2024-11-27 19:54:00,340 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dab80af-618f-475b-9864-969976b18a30/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2024-11-27 19:54:00,529 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dab80af-618f-475b-9864-969976b18a30/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 19:54:00,529 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-27 19:54:00,530 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 19:54:00,530 INFO L85 PathProgramCache]: Analyzing trace with hash -1547491092, now seen corresponding path program 1 times [2024-11-27 19:54:00,531 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-27 19:54:00,531 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [23812558] [2024-11-27 19:54:00,531 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 19:54:00,531 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 19:54:00,531 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dab80af-618f-475b-9864-969976b18a30/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 19:54:00,534 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dab80af-618f-475b-9864-969976b18a30/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 19:54:00,538 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dab80af-618f-475b-9864-969976b18a30/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-27 19:54:00,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 19:54:00,645 INFO L256 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 11 conjuncts are in the unsatisfiable core [2024-11-27 19:54:00,649 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 19:54:00,660 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 19:54:00,751 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 19:54:00,751 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-27 19:54:00,752 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-27 19:54:00,752 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [23812558] [2024-11-27 19:54:00,752 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [23812558] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-27 19:54:00,752 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-27 19:54:00,752 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-11-27 19:54:00,752 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [100576793] [2024-11-27 19:54:00,752 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-27 19:54:00,753 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-27 19:54:00,753 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-27 19:54:00,754 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-27 19:54:00,754 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-11-27 19:54:00,754 INFO L87 Difference]: Start difference. First operand 41 states and 49 transitions. Second operand has 6 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 1 states have call predecessors, (5), 3 states have call successors, (5) [2024-11-27 19:54:00,952 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 19:54:00,952 INFO L93 Difference]: Finished difference Result 79 states and 100 transitions. [2024-11-27 19:54:00,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-27 19:54:00,954 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 1 states have call predecessors, (5), 3 states have call successors, (5) Word has length 35 [2024-11-27 19:54:00,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 19:54:00,956 INFO L225 Difference]: With dead ends: 79 [2024-11-27 19:54:00,956 INFO L226 Difference]: Without dead ends: 43 [2024-11-27 19:54:00,957 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-11-27 19:54:00,958 INFO L435 NwaCegarLoop]: 31 mSDtfsCounter, 7 mSDsluCounter, 78 mSDsCounter, 0 mSdLazyCounter, 55 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 109 SdHoareTripleChecker+Invalid, 60 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 55 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-27 19:54:00,958 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 109 Invalid, 60 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 55 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-27 19:54:00,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2024-11-27 19:54:00,970 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2024-11-27 19:54:00,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 29 states have (on average 1.1724137931034482) internal successors, (34), 30 states have internal predecessors, (34), 6 states have call successors, (6), 4 states have call predecessors, (6), 7 states have return successors, (11), 8 states have call predecessors, (11), 6 states have call successors, (11) [2024-11-27 19:54:00,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 51 transitions. [2024-11-27 19:54:00,973 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 51 transitions. Word has length 35 [2024-11-27 19:54:00,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-27 19:54:00,973 INFO L471 AbstractCegarLoop]: Abstraction has 43 states and 51 transitions. [2024-11-27 19:54:00,974 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 1 states have call predecessors, (5), 3 states have call successors, (5) [2024-11-27 19:54:00,974 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 51 transitions. [2024-11-27 19:54:00,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2024-11-27 19:54:00,976 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 19:54:00,976 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] [2024-11-27 19:54:00,992 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dab80af-618f-475b-9864-969976b18a30/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2024-11-27 19:54:01,176 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dab80af-618f-475b-9864-969976b18a30/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 19:54:01,177 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-27 19:54:01,177 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 19:54:01,178 INFO L85 PathProgramCache]: Analyzing trace with hash 1997394184, now seen corresponding path program 1 times [2024-11-27 19:54:01,178 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-27 19:54:01,178 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1969727317] [2024-11-27 19:54:01,178 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 19:54:01,179 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 19:54:01,179 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dab80af-618f-475b-9864-969976b18a30/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 19:54:01,181 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dab80af-618f-475b-9864-969976b18a30/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 19:54:01,183 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dab80af-618f-475b-9864-969976b18a30/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-27 19:54:01,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 19:54:01,321 INFO L256 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 19 conjuncts are in the unsatisfiable core [2024-11-27 19:54:01,325 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 19:54:01,331 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 19:54:01,690 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-27 19:54:01,690 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-27 19:54:02,644 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-27 19:54:02,644 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-27 19:54:02,644 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1969727317] [2024-11-27 19:54:02,644 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1969727317] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-27 19:54:02,645 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-27 19:54:02,645 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 17 [2024-11-27 19:54:02,645 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [539055424] [2024-11-27 19:54:02,645 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-27 19:54:02,646 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-11-27 19:54:02,646 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-27 19:54:02,647 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-11-27 19:54:02,647 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=215, Unknown=0, NotChecked=0, Total=272 [2024-11-27 19:54:02,647 INFO L87 Difference]: Start difference. First operand 43 states and 51 transitions. Second operand has 17 states, 13 states have (on average 2.4615384615384617) internal successors, (32), 14 states have internal predecessors, (32), 7 states have call successors, (9), 4 states have call predecessors, (9), 5 states have return successors, (9), 6 states have call predecessors, (9), 7 states have call successors, (9) [2024-11-27 19:54:03,463 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 19:54:03,463 INFO L93 Difference]: Finished difference Result 48 states and 55 transitions. [2024-11-27 19:54:03,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-27 19:54:03,464 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 13 states have (on average 2.4615384615384617) internal successors, (32), 14 states have internal predecessors, (32), 7 states have call successors, (9), 4 states have call predecessors, (9), 5 states have return successors, (9), 6 states have call predecessors, (9), 7 states have call successors, (9) Word has length 40 [2024-11-27 19:54:03,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 19:54:03,466 INFO L225 Difference]: With dead ends: 48 [2024-11-27 19:54:03,466 INFO L226 Difference]: Without dead ends: 41 [2024-11-27 19:54:03,467 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=92, Invalid=328, Unknown=0, NotChecked=0, Total=420 [2024-11-27 19:54:03,468 INFO L435 NwaCegarLoop]: 16 mSDtfsCounter, 35 mSDsluCounter, 97 mSDsCounter, 0 mSdLazyCounter, 223 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 113 SdHoareTripleChecker+Invalid, 241 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 223 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-11-27 19:54:03,468 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [38 Valid, 113 Invalid, 241 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 223 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-11-27 19:54:03,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2024-11-27 19:54:03,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2024-11-27 19:54:03,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 27 states have (on average 1.1851851851851851) internal successors, (32), 29 states have internal predecessors, (32), 6 states have call successors, (6), 4 states have call predecessors, (6), 7 states have return successors, (10), 7 states have call predecessors, (10), 6 states have call successors, (10) [2024-11-27 19:54:03,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 48 transitions. [2024-11-27 19:54:03,478 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 48 transitions. Word has length 40 [2024-11-27 19:54:03,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-27 19:54:03,478 INFO L471 AbstractCegarLoop]: Abstraction has 41 states and 48 transitions. [2024-11-27 19:54:03,479 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 13 states have (on average 2.4615384615384617) internal successors, (32), 14 states have internal predecessors, (32), 7 states have call successors, (9), 4 states have call predecessors, (9), 5 states have return successors, (9), 6 states have call predecessors, (9), 7 states have call successors, (9) [2024-11-27 19:54:03,479 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 48 transitions. [2024-11-27 19:54:03,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2024-11-27 19:54:03,481 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 19:54:03,481 INFO L218 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 19:54:03,494 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dab80af-618f-475b-9864-969976b18a30/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2024-11-27 19:54:03,682 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dab80af-618f-475b-9864-969976b18a30/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 19:54:03,682 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-27 19:54:03,683 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 19:54:03,683 INFO L85 PathProgramCache]: Analyzing trace with hash 1634922255, now seen corresponding path program 1 times [2024-11-27 19:54:03,683 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-27 19:54:03,683 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1193602319] [2024-11-27 19:54:03,683 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 19:54:03,684 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 19:54:03,684 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dab80af-618f-475b-9864-969976b18a30/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 19:54:03,686 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dab80af-618f-475b-9864-969976b18a30/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 19:54:03,692 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dab80af-618f-475b-9864-969976b18a30/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-11-27 19:54:03,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 19:54:03,859 INFO L256 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 26 conjuncts are in the unsatisfiable core [2024-11-27 19:54:03,868 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 19:54:03,939 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 19:54:04,140 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 19 treesize of output 11 [2024-11-27 19:54:04,301 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 22 proven. 11 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2024-11-27 19:54:04,301 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-27 19:54:05,155 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 16 treesize of output 12 [2024-11-27 19:54:05,794 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-27 19:54:05,794 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1193602319] [2024-11-27 19:54:05,794 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1193602319] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-27 19:54:05,794 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [4092807] [2024-11-27 19:54:05,794 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 19:54:05,795 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-11-27 19:54:05,795 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dab80af-618f-475b-9864-969976b18a30/bin/uautomizer-verify-aQ6SnzHsRB/cvc4 [2024-11-27 19:54:05,810 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dab80af-618f-475b-9864-969976b18a30/bin/uautomizer-verify-aQ6SnzHsRB/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2024-11-27 19:54:05,813 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dab80af-618f-475b-9864-969976b18a30/bin/uautomizer-verify-aQ6SnzHsRB/cvc4 --incremental --print-success --lang smt (11)] Waiting until timeout for monitored process [2024-11-27 19:54:06,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 19:54:06,202 INFO L256 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 26 conjuncts are in the unsatisfiable core [2024-11-27 19:54:06,210 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 19:54:06,221 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 19:54:06,853 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 19 treesize of output 11 [2024-11-27 19:54:06,937 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2024-11-27 19:54:06,937 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-27 19:54:08,003 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 7 treesize of output 3 [2024-11-27 19:54:08,362 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [4092807] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-27 19:54:08,363 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-27 19:54:08,363 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 18 [2024-11-27 19:54:08,363 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1846683312] [2024-11-27 19:54:08,364 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-27 19:54:08,365 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-11-27 19:54:08,365 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-27 19:54:08,367 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-11-27 19:54:08,370 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=683, Unknown=0, NotChecked=0, Total=756 [2024-11-27 19:54:08,371 INFO L87 Difference]: Start difference. First operand 41 states and 48 transitions. Second operand has 18 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 17 states have internal predecessors, (47), 10 states have call successors, (14), 3 states have call predecessors, (14), 7 states have return successors, (14), 10 states have call predecessors, (14), 10 states have call successors, (14) [2024-11-27 19:54:11,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 19:54:11,150 INFO L93 Difference]: Finished difference Result 76 states and 97 transitions. [2024-11-27 19:54:11,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2024-11-27 19:54:11,151 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 17 states have internal predecessors, (47), 10 states have call successors, (14), 3 states have call predecessors, (14), 7 states have return successors, (14), 10 states have call predecessors, (14), 10 states have call successors, (14) Word has length 67 [2024-11-27 19:54:11,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 19:54:11,153 INFO L225 Difference]: With dead ends: 76 [2024-11-27 19:54:11,153 INFO L226 Difference]: Without dead ends: 71 [2024-11-27 19:54:11,154 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 141 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 295 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=205, Invalid=1775, Unknown=0, NotChecked=0, Total=1980 [2024-11-27 19:54:11,155 INFO L435 NwaCegarLoop]: 14 mSDtfsCounter, 41 mSDsluCounter, 131 mSDsCounter, 0 mSdLazyCounter, 608 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 145 SdHoareTripleChecker+Invalid, 633 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 608 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2024-11-27 19:54:11,155 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [41 Valid, 145 Invalid, 633 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 608 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2024-11-27 19:54:11,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2024-11-27 19:54:11,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 61. [2024-11-27 19:54:11,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 40 states have (on average 1.175) internal successors, (47), 40 states have internal predecessors, (47), 7 states have call successors, (7), 5 states have call predecessors, (7), 13 states have return successors, (26), 15 states have call predecessors, (26), 7 states have call successors, (26) [2024-11-27 19:54:11,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 80 transitions. [2024-11-27 19:54:11,171 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 80 transitions. Word has length 67 [2024-11-27 19:54:11,171 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-27 19:54:11,171 INFO L471 AbstractCegarLoop]: Abstraction has 61 states and 80 transitions. [2024-11-27 19:54:11,172 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 17 states have internal predecessors, (47), 10 states have call successors, (14), 3 states have call predecessors, (14), 7 states have return successors, (14), 10 states have call predecessors, (14), 10 states have call successors, (14) [2024-11-27 19:54:11,172 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 80 transitions. [2024-11-27 19:54:11,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2024-11-27 19:54:11,174 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 19:54:11,174 INFO L218 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 19:54:11,186 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dab80af-618f-475b-9864-969976b18a30/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2024-11-27 19:54:11,378 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dab80af-618f-475b-9864-969976b18a30/bin/uautomizer-verify-aQ6SnzHsRB/cvc4 --incremental --print-success --lang smt (11)] Ended with exit code 0 [2024-11-27 19:54:11,575 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dab80af-618f-475b-9864-969976b18a30/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dab80af-618f-475b-9864-969976b18a30/bin/uautomizer-verify-aQ6SnzHsRB/cvc4 --incremental --print-success --lang smt [2024-11-27 19:54:11,575 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-27 19:54:11,576 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 19:54:11,576 INFO L85 PathProgramCache]: Analyzing trace with hash 1636771219, now seen corresponding path program 2 times [2024-11-27 19:54:11,576 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-27 19:54:11,576 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1492296129] [2024-11-27 19:54:11,576 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-27 19:54:11,577 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 19:54:11,577 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dab80af-618f-475b-9864-969976b18a30/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 19:54:11,578 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dab80af-618f-475b-9864-969976b18a30/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 19:54:11,582 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dab80af-618f-475b-9864-969976b18a30/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-11-27 19:54:11,735 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-27 19:54:11,735 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 19:54:11,739 INFO L256 TraceCheckSpWp]: Trace formula consists of 245 conjuncts, 18 conjuncts are in the unsatisfiable core [2024-11-27 19:54:11,745 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 19:54:11,758 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 19:54:12,017 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 41 proven. 3 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2024-11-27 19:54:12,017 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-27 19:54:13,049 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 4 proven. 26 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2024-11-27 19:54:13,050 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-27 19:54:13,050 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1492296129] [2024-11-27 19:54:13,050 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1492296129] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-27 19:54:13,050 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-27 19:54:13,050 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 17 [2024-11-27 19:54:13,050 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1445619322] [2024-11-27 19:54:13,051 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-27 19:54:13,051 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-11-27 19:54:13,051 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-27 19:54:13,052 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-11-27 19:54:13,053 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=215, Unknown=0, NotChecked=0, Total=272 [2024-11-27 19:54:13,053 INFO L87 Difference]: Start difference. First operand 61 states and 80 transitions. Second operand has 17 states, 13 states have (on average 4.0) internal successors, (52), 14 states have internal predecessors, (52), 8 states have call successors, (18), 5 states have call predecessors, (18), 6 states have return successors, (18), 6 states have call predecessors, (18), 8 states have call successors, (18) [2024-11-27 19:54:13,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 19:54:13,825 INFO L93 Difference]: Finished difference Result 103 states and 136 transitions. [2024-11-27 19:54:13,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-27 19:54:13,828 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 13 states have (on average 4.0) internal successors, (52), 14 states have internal predecessors, (52), 8 states have call successors, (18), 5 states have call predecessors, (18), 6 states have return successors, (18), 6 states have call predecessors, (18), 8 states have call successors, (18) Word has length 67 [2024-11-27 19:54:13,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 19:54:13,829 INFO L225 Difference]: With dead ends: 103 [2024-11-27 19:54:13,829 INFO L226 Difference]: Without dead ends: 47 [2024-11-27 19:54:13,830 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 117 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=98, Invalid=364, Unknown=0, NotChecked=0, Total=462 [2024-11-27 19:54:13,833 INFO L435 NwaCegarLoop]: 24 mSDtfsCounter, 25 mSDsluCounter, 154 mSDsCounter, 0 mSdLazyCounter, 217 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 178 SdHoareTripleChecker+Invalid, 235 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 217 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-11-27 19:54:13,833 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 178 Invalid, 235 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 217 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-11-27 19:54:13,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2024-11-27 19:54:13,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2024-11-27 19:54:13,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 31 states have (on average 1.1612903225806452) internal successors, (36), 32 states have internal predecessors, (36), 6 states have call successors, (6), 4 states have call predecessors, (6), 9 states have return successors, (13), 10 states have call predecessors, (13), 6 states have call successors, (13) [2024-11-27 19:54:13,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 55 transitions. [2024-11-27 19:54:13,852 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 55 transitions. Word has length 67 [2024-11-27 19:54:13,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-27 19:54:13,852 INFO L471 AbstractCegarLoop]: Abstraction has 47 states and 55 transitions. [2024-11-27 19:54:13,853 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 13 states have (on average 4.0) internal successors, (52), 14 states have internal predecessors, (52), 8 states have call successors, (18), 5 states have call predecessors, (18), 6 states have return successors, (18), 6 states have call predecessors, (18), 8 states have call successors, (18) [2024-11-27 19:54:13,853 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 55 transitions. [2024-11-27 19:54:13,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2024-11-27 19:54:13,854 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 19:54:13,854 INFO L218 NwaCegarLoop]: trace histogram [8, 8, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 19:54:13,867 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dab80af-618f-475b-9864-969976b18a30/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2024-11-27 19:54:14,054 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dab80af-618f-475b-9864-969976b18a30/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 19:54:14,055 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-27 19:54:14,056 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 19:54:14,056 INFO L85 PathProgramCache]: Analyzing trace with hash -2137473517, now seen corresponding path program 3 times [2024-11-27 19:54:14,056 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-27 19:54:14,056 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1393337427] [2024-11-27 19:54:14,057 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-27 19:54:14,057 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 19:54:14,057 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dab80af-618f-475b-9864-969976b18a30/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 19:54:14,062 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dab80af-618f-475b-9864-969976b18a30/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 19:54:14,064 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dab80af-618f-475b-9864-969976b18a30/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-11-27 19:54:14,254 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-11-27 19:54:14,254 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 19:54:14,257 INFO L256 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 28 conjuncts are in the unsatisfiable core [2024-11-27 19:54:14,263 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 19:54:14,270 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 19:54:14,718 INFO L134 CoverageAnalysis]: Checked inductivity of 211 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 203 trivial. 0 not checked. [2024-11-27 19:54:14,718 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-27 19:54:16,480 INFO L134 CoverageAnalysis]: Checked inductivity of 211 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 196 trivial. 0 not checked. [2024-11-27 19:54:16,480 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-27 19:54:16,480 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1393337427] [2024-11-27 19:54:16,480 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1393337427] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-27 19:54:16,480 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-27 19:54:16,480 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 14] total 22 [2024-11-27 19:54:16,480 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1111874785] [2024-11-27 19:54:16,480 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-27 19:54:16,481 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-11-27 19:54:16,481 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-27 19:54:16,482 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-11-27 19:54:16,482 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=381, Unknown=0, NotChecked=0, Total=462 [2024-11-27 19:54:16,482 INFO L87 Difference]: Start difference. First operand 47 states and 55 transitions. Second operand has 22 states, 17 states have (on average 2.176470588235294) internal successors, (37), 18 states have internal predecessors, (37), 9 states have call successors, (11), 5 states have call predecessors, (11), 7 states have return successors, (12), 9 states have call predecessors, (12), 9 states have call successors, (12) [2024-11-27 19:54:17,236 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 19:54:17,236 INFO L93 Difference]: Finished difference Result 52 states and 59 transitions. [2024-11-27 19:54:17,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-27 19:54:17,237 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 17 states have (on average 2.176470588235294) internal successors, (37), 18 states have internal predecessors, (37), 9 states have call successors, (11), 5 states have call predecessors, (11), 7 states have return successors, (12), 9 states have call predecessors, (12), 9 states have call successors, (12) Word has length 99 [2024-11-27 19:54:17,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 19:54:17,239 INFO L225 Difference]: With dead ends: 52 [2024-11-27 19:54:17,239 INFO L226 Difference]: Without dead ends: 45 [2024-11-27 19:54:17,240 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 200 GetRequests, 176 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=126, Invalid=524, Unknown=0, NotChecked=0, Total=650 [2024-11-27 19:54:17,241 INFO L435 NwaCegarLoop]: 17 mSDtfsCounter, 30 mSDsluCounter, 100 mSDsCounter, 0 mSdLazyCounter, 197 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 117 SdHoareTripleChecker+Invalid, 212 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 197 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-11-27 19:54:17,241 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [33 Valid, 117 Invalid, 212 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 197 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-11-27 19:54:17,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2024-11-27 19:54:17,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2024-11-27 19:54:17,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 29 states have (on average 1.1724137931034482) internal successors, (34), 31 states have internal predecessors, (34), 6 states have call successors, (6), 4 states have call predecessors, (6), 9 states have return successors, (12), 9 states have call predecessors, (12), 6 states have call successors, (12) [2024-11-27 19:54:17,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 52 transitions. [2024-11-27 19:54:17,254 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 52 transitions. Word has length 99 [2024-11-27 19:54:17,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-27 19:54:17,255 INFO L471 AbstractCegarLoop]: Abstraction has 45 states and 52 transitions. [2024-11-27 19:54:17,255 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 17 states have (on average 2.176470588235294) internal successors, (37), 18 states have internal predecessors, (37), 9 states have call successors, (11), 5 states have call predecessors, (11), 7 states have return successors, (12), 9 states have call predecessors, (12), 9 states have call successors, (12) [2024-11-27 19:54:17,255 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 52 transitions. [2024-11-27 19:54:17,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2024-11-27 19:54:17,261 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 19:54:17,261 INFO L218 NwaCegarLoop]: trace histogram [12, 12, 9, 9, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 4, 4, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 19:54:17,277 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dab80af-618f-475b-9864-969976b18a30/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2024-11-27 19:54:17,462 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dab80af-618f-475b-9864-969976b18a30/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 19:54:17,462 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-27 19:54:17,463 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 19:54:17,463 INFO L85 PathProgramCache]: Analyzing trace with hash 620889616, now seen corresponding path program 2 times [2024-11-27 19:54:17,464 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-27 19:54:17,464 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1425166482] [2024-11-27 19:54:17,464 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-27 19:54:17,464 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 19:54:17,464 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dab80af-618f-475b-9864-969976b18a30/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 19:54:17,470 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dab80af-618f-475b-9864-969976b18a30/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 19:54:17,472 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dab80af-618f-475b-9864-969976b18a30/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-11-27 19:54:17,755 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-27 19:54:17,755 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 19:54:17,760 INFO L256 TraceCheckSpWp]: Trace formula consists of 473 conjuncts, 34 conjuncts are in the unsatisfiable core [2024-11-27 19:54:17,767 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 19:54:17,772 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 19:54:18,193 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 19 treesize of output 11 [2024-11-27 19:54:18,265 INFO L134 CoverageAnalysis]: Checked inductivity of 501 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 484 trivial. 0 not checked. [2024-11-27 19:54:18,265 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-27 19:54:19,303 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 7 treesize of output 3 [2024-11-27 19:54:19,791 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-27 19:54:19,791 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1425166482] [2024-11-27 19:54:19,791 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1425166482] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-27 19:54:19,791 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [952413375] [2024-11-27 19:54:19,791 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-27 19:54:19,791 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-11-27 19:54:19,792 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dab80af-618f-475b-9864-969976b18a30/bin/uautomizer-verify-aQ6SnzHsRB/cvc4 [2024-11-27 19:54:19,795 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dab80af-618f-475b-9864-969976b18a30/bin/uautomizer-verify-aQ6SnzHsRB/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2024-11-27 19:54:19,796 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dab80af-618f-475b-9864-969976b18a30/bin/uautomizer-verify-aQ6SnzHsRB/cvc4 --incremental --print-success --lang smt (15)] Waiting until timeout for monitored process [2024-11-27 19:54:20,371 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-27 19:54:20,371 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1270126826] [2024-11-27 19:54:20,371 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-27 19:54:20,373 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-11-27 19:54:20,373 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dab80af-618f-475b-9864-969976b18a30/bin/uautomizer-verify-aQ6SnzHsRB/mathsat [2024-11-27 19:54:20,377 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dab80af-618f-475b-9864-969976b18a30/bin/uautomizer-verify-aQ6SnzHsRB/cvc4 --incremental --print-success --lang smt (15)] Ended with exit code 1 [2024-11-27 19:54:20,379 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dab80af-618f-475b-9864-969976b18a30/bin/uautomizer-verify-aQ6SnzHsRB/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2024-11-27 19:54:20,380 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dab80af-618f-475b-9864-969976b18a30/bin/uautomizer-verify-aQ6SnzHsRB/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2024-11-27 19:54:20,800 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-27 19:54:20,800 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 19:54:20,822 INFO L256 TraceCheckSpWp]: Trace formula consists of 473 conjuncts, 36 conjuncts are in the unsatisfiable core [2024-11-27 19:54:20,830 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 19:54:20,835 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 19:54:20,849 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 19:54:20,936 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 19:54:21,725 INFO L134 CoverageAnalysis]: Checked inductivity of 501 backedges. 114 proven. 3 refuted. 0 times theorem prover too weak. 384 trivial. 0 not checked. [2024-11-27 19:54:21,725 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-27 19:54:23,824 INFO L134 CoverageAnalysis]: Checked inductivity of 501 backedges. 10 proven. 120 refuted. 0 times theorem prover too weak. 371 trivial. 0 not checked. [2024-11-27 19:54:23,824 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1270126826] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-27 19:54:23,824 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-27 19:54:23,825 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 27 [2024-11-27 19:54:23,825 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [843589042] [2024-11-27 19:54:23,825 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-27 19:54:23,826 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2024-11-27 19:54:23,827 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-27 19:54:23,828 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2024-11-27 19:54:23,828 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=958, Unknown=0, NotChecked=0, Total=1056 [2024-11-27 19:54:23,829 INFO L87 Difference]: Start difference. First operand 45 states and 52 transitions. Second operand has 27 states, 20 states have (on average 3.2) internal successors, (64), 23 states have internal predecessors, (64), 11 states have call successors, (23), 6 states have call predecessors, (23), 10 states have return successors, (25), 9 states have call predecessors, (25), 11 states have call successors, (25) [2024-11-27 19:54:25,979 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 19:54:25,979 INFO L93 Difference]: Finished difference Result 91 states and 114 transitions. [2024-11-27 19:54:25,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2024-11-27 19:54:25,980 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 20 states have (on average 3.2) internal successors, (64), 23 states have internal predecessors, (64), 11 states have call successors, (23), 6 states have call predecessors, (23), 10 states have return successors, (25), 9 states have call predecessors, (25), 11 states have call successors, (25) Word has length 142 [2024-11-27 19:54:25,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 19:54:25,981 INFO L225 Difference]: With dead ends: 91 [2024-11-27 19:54:25,981 INFO L226 Difference]: Without dead ends: 51 [2024-11-27 19:54:25,983 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 444 GetRequests, 405 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 247 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=167, Invalid=1473, Unknown=0, NotChecked=0, Total=1640 [2024-11-27 19:54:25,984 INFO L435 NwaCegarLoop]: 16 mSDtfsCounter, 41 mSDsluCounter, 208 mSDsCounter, 0 mSdLazyCounter, 591 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 224 SdHoareTripleChecker+Invalid, 615 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 591 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2024-11-27 19:54:25,984 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [43 Valid, 224 Invalid, 615 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 591 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2024-11-27 19:54:25,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2024-11-27 19:54:26,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2024-11-27 19:54:26,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 33 states have (on average 1.1515151515151516) internal successors, (38), 34 states have internal predecessors, (38), 6 states have call successors, (6), 4 states have call predecessors, (6), 11 states have return successors, (15), 12 states have call predecessors, (15), 6 states have call successors, (15) [2024-11-27 19:54:26,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 59 transitions. [2024-11-27 19:54:26,002 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 59 transitions. Word has length 142 [2024-11-27 19:54:26,002 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-27 19:54:26,003 INFO L471 AbstractCegarLoop]: Abstraction has 51 states and 59 transitions. [2024-11-27 19:54:26,003 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 20 states have (on average 3.2) internal successors, (64), 23 states have internal predecessors, (64), 11 states have call successors, (23), 6 states have call predecessors, (23), 10 states have return successors, (25), 9 states have call predecessors, (25), 11 states have call successors, (25) [2024-11-27 19:54:26,003 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 59 transitions. [2024-11-27 19:54:26,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 173 [2024-11-27 19:54:26,006 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 19:54:26,006 INFO L218 NwaCegarLoop]: trace histogram [18, 18, 12, 12, 12, 9, 9, 6, 6, 6, 6, 6, 6, 6, 4, 4, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 19:54:26,022 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dab80af-618f-475b-9864-969976b18a30/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2024-11-27 19:54:26,212 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dab80af-618f-475b-9864-969976b18a30/bin/uautomizer-verify-aQ6SnzHsRB/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (16)] Ended with exit code 0 [2024-11-27 19:54:26,407 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dab80af-618f-475b-9864-969976b18a30/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dab80af-618f-475b-9864-969976b18a30/bin/uautomizer-verify-aQ6SnzHsRB/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-11-27 19:54:26,408 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-27 19:54:26,408 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 19:54:26,408 INFO L85 PathProgramCache]: Analyzing trace with hash -1305089238, now seen corresponding path program 4 times [2024-11-27 19:54:26,409 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-27 19:54:26,409 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [642636531] [2024-11-27 19:54:26,409 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-27 19:54:26,409 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 19:54:26,409 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dab80af-618f-475b-9864-969976b18a30/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 19:54:26,411 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dab80af-618f-475b-9864-969976b18a30/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 19:54:26,412 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dab80af-618f-475b-9864-969976b18a30/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2024-11-27 19:54:26,661 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-27 19:54:26,661 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 19:54:26,667 INFO L256 TraceCheckSpWp]: Trace formula consists of 537 conjuncts, 26 conjuncts are in the unsatisfiable core [2024-11-27 19:54:26,672 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 19:54:26,677 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 19:54:27,066 INFO L134 CoverageAnalysis]: Checked inductivity of 900 backedges. 424 proven. 8 refuted. 0 times theorem prover too weak. 468 trivial. 0 not checked. [2024-11-27 19:54:27,066 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-27 19:54:29,375 INFO L134 CoverageAnalysis]: Checked inductivity of 900 backedges. 6 proven. 117 refuted. 0 times theorem prover too weak. 777 trivial. 0 not checked. [2024-11-27 19:54:29,376 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-27 19:54:29,376 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [642636531] [2024-11-27 19:54:29,376 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [642636531] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-27 19:54:29,376 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-27 19:54:29,376 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 14] total 22 [2024-11-27 19:54:29,376 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [70008812] [2024-11-27 19:54:29,377 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-27 19:54:29,377 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-11-27 19:54:29,377 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-27 19:54:29,378 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-11-27 19:54:29,379 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=381, Unknown=0, NotChecked=0, Total=462 [2024-11-27 19:54:29,379 INFO L87 Difference]: Start difference. First operand 51 states and 59 transitions. Second operand has 22 states, 17 states have (on average 3.3529411764705883) internal successors, (57), 18 states have internal predecessors, (57), 10 states have call successors, (20), 6 states have call predecessors, (20), 8 states have return successors, (21), 9 states have call predecessors, (21), 10 states have call successors, (21) [2024-11-27 19:54:30,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 19:54:30,340 INFO L93 Difference]: Finished difference Result 99 states and 120 transitions. [2024-11-27 19:54:30,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-27 19:54:30,347 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 17 states have (on average 3.3529411764705883) internal successors, (57), 18 states have internal predecessors, (57), 10 states have call successors, (20), 6 states have call predecessors, (20), 8 states have return successors, (21), 9 states have call predecessors, (21), 10 states have call successors, (21) Word has length 172 [2024-11-27 19:54:30,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 19:54:30,348 INFO L225 Difference]: With dead ends: 99 [2024-11-27 19:54:30,348 INFO L226 Difference]: Without dead ends: 53 [2024-11-27 19:54:30,349 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 347 GetRequests, 322 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=133, Invalid=569, Unknown=0, NotChecked=0, Total=702 [2024-11-27 19:54:30,350 INFO L435 NwaCegarLoop]: 25 mSDtfsCounter, 19 mSDsluCounter, 205 mSDsCounter, 0 mSdLazyCounter, 277 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 230 SdHoareTripleChecker+Invalid, 294 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 277 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2024-11-27 19:54:30,350 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 230 Invalid, 294 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 277 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2024-11-27 19:54:30,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2024-11-27 19:54:30,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2024-11-27 19:54:30,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 34 states have (on average 1.1470588235294117) internal successors, (39), 35 states have internal predecessors, (39), 6 states have call successors, (6), 4 states have call predecessors, (6), 12 states have return successors, (16), 13 states have call predecessors, (16), 6 states have call successors, (16) [2024-11-27 19:54:30,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 61 transitions. [2024-11-27 19:54:30,369 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 61 transitions. Word has length 172 [2024-11-27 19:54:30,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-27 19:54:30,370 INFO L471 AbstractCegarLoop]: Abstraction has 53 states and 61 transitions. [2024-11-27 19:54:30,370 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 17 states have (on average 3.3529411764705883) internal successors, (57), 18 states have internal predecessors, (57), 10 states have call successors, (20), 6 states have call predecessors, (20), 8 states have return successors, (21), 9 states have call predecessors, (21), 10 states have call successors, (21) [2024-11-27 19:54:30,370 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 61 transitions. [2024-11-27 19:54:30,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 236 [2024-11-27 19:54:30,375 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 19:54:30,375 INFO L218 NwaCegarLoop]: trace histogram [27, 27, 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] [2024-11-27 19:54:30,388 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dab80af-618f-475b-9864-969976b18a30/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2024-11-27 19:54:30,576 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dab80af-618f-475b-9864-969976b18a30/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 19:54:30,576 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-27 19:54:30,577 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 19:54:30,577 INFO L85 PathProgramCache]: Analyzing trace with hash 1865060492, now seen corresponding path program 5 times [2024-11-27 19:54:30,577 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-27 19:54:30,578 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1915910983] [2024-11-27 19:54:30,578 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-27 19:54:30,578 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 19:54:30,578 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dab80af-618f-475b-9864-969976b18a30/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 19:54:30,580 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dab80af-618f-475b-9864-969976b18a30/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 19:54:30,582 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dab80af-618f-475b-9864-969976b18a30/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2024-11-27 19:54:30,946 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2024-11-27 19:54:30,946 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 19:54:30,951 INFO L256 TraceCheckSpWp]: Trace formula consists of 280 conjuncts, 29 conjuncts are in the unsatisfiable core [2024-11-27 19:54:30,959 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 19:54:30,965 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 19:54:31,310 INFO L134 CoverageAnalysis]: Checked inductivity of 1962 backedges. 358 proven. 8 refuted. 0 times theorem prover too weak. 1596 trivial. 0 not checked. [2024-11-27 19:54:31,311 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-27 19:54:34,867 INFO L134 CoverageAnalysis]: Checked inductivity of 1962 backedges. 12 proven. 377 refuted. 0 times theorem prover too weak. 1573 trivial. 0 not checked. [2024-11-27 19:54:34,867 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-27 19:54:34,867 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1915910983] [2024-11-27 19:54:34,867 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1915910983] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-27 19:54:34,867 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-27 19:54:34,868 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 14] total 22 [2024-11-27 19:54:34,868 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1356530980] [2024-11-27 19:54:34,868 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-27 19:54:34,869 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-11-27 19:54:34,869 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-27 19:54:34,870 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-11-27 19:54:34,870 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=381, Unknown=0, NotChecked=0, Total=462 [2024-11-27 19:54:34,871 INFO L87 Difference]: Start difference. First operand 53 states and 61 transitions. Second operand has 22 states, 17 states have (on average 3.176470588235294) internal successors, (54), 18 states have internal predecessors, (54), 7 states have call successors, (18), 6 states have call predecessors, (18), 8 states have return successors, (20), 6 states have call predecessors, (20), 7 states have call successors, (20) [2024-11-27 19:54:35,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 19:54:35,613 INFO L93 Difference]: Finished difference Result 103 states and 128 transitions. [2024-11-27 19:54:35,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-27 19:54:35,615 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 17 states have (on average 3.176470588235294) internal successors, (54), 18 states have internal predecessors, (54), 7 states have call successors, (18), 6 states have call predecessors, (18), 8 states have return successors, (20), 6 states have call predecessors, (20), 7 states have call successors, (20) Word has length 235 [2024-11-27 19:54:35,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 19:54:35,617 INFO L225 Difference]: With dead ends: 103 [2024-11-27 19:54:35,617 INFO L226 Difference]: Without dead ends: 55 [2024-11-27 19:54:35,619 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 472 GetRequests, 448 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=122, Invalid=528, Unknown=0, NotChecked=0, Total=650 [2024-11-27 19:54:35,620 INFO L435 NwaCegarLoop]: 33 mSDtfsCounter, 11 mSDsluCounter, 217 mSDsCounter, 0 mSdLazyCounter, 164 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 250 SdHoareTripleChecker+Invalid, 173 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 164 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-11-27 19:54:35,620 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 250 Invalid, 173 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 164 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-11-27 19:54:35,622 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2024-11-27 19:54:35,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2024-11-27 19:54:35,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 35 states have (on average 1.1428571428571428) internal successors, (40), 36 states have internal predecessors, (40), 6 states have call successors, (6), 4 states have call predecessors, (6), 13 states have return successors, (17), 14 states have call predecessors, (17), 6 states have call successors, (17) [2024-11-27 19:54:35,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 63 transitions. [2024-11-27 19:54:35,646 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 63 transitions. Word has length 235 [2024-11-27 19:54:35,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-27 19:54:35,647 INFO L471 AbstractCegarLoop]: Abstraction has 55 states and 63 transitions. [2024-11-27 19:54:35,647 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 17 states have (on average 3.176470588235294) internal successors, (54), 18 states have internal predecessors, (54), 7 states have call successors, (18), 6 states have call predecessors, (18), 8 states have return successors, (20), 6 states have call predecessors, (20), 7 states have call successors, (20) [2024-11-27 19:54:35,647 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 63 transitions. [2024-11-27 19:54:35,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 281 [2024-11-27 19:54:35,657 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 19:54:35,657 INFO L218 NwaCegarLoop]: trace histogram [36, 36, 27, 27, 27, 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] [2024-11-27 19:54:35,676 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dab80af-618f-475b-9864-969976b18a30/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2024-11-27 19:54:35,858 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dab80af-618f-475b-9864-969976b18a30/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 19:54:35,859 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-27 19:54:35,860 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 19:54:35,861 INFO L85 PathProgramCache]: Analyzing trace with hash -362336084, now seen corresponding path program 6 times [2024-11-27 19:54:35,862 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-27 19:54:35,862 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [722939406] [2024-11-27 19:54:35,862 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-27 19:54:35,863 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 19:54:35,863 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dab80af-618f-475b-9864-969976b18a30/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 19:54:35,866 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dab80af-618f-475b-9864-969976b18a30/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 19:54:35,870 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dab80af-618f-475b-9864-969976b18a30/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2024-11-27 19:54:38,243 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2024-11-27 19:54:38,243 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 19:54:38,252 INFO L256 TraceCheckSpWp]: Trace formula consists of 438 conjuncts, 39 conjuncts are in the unsatisfiable core [2024-11-27 19:54:38,266 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 19:54:38,274 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 19:54:59,621 INFO L134 CoverageAnalysis]: Checked inductivity of 3276 backedges. 1504 proven. 15 refuted. 0 times theorem prover too weak. 1757 trivial. 0 not checked. [2024-11-27 19:54:59,621 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-27 19:55:06,077 INFO L134 CoverageAnalysis]: Checked inductivity of 3276 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 3243 trivial. 0 not checked. [2024-11-27 19:55:06,078 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-27 19:55:06,078 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [722939406] [2024-11-27 19:55:06,078 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [722939406] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-27 19:55:06,078 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-27 19:55:06,078 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 19] total 32 [2024-11-27 19:55:06,078 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1003997660] [2024-11-27 19:55:06,078 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-27 19:55:06,079 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2024-11-27 19:55:06,079 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-27 19:55:06,080 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2024-11-27 19:55:06,080 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=148, Invalid=839, Unknown=5, NotChecked=0, Total=992 [2024-11-27 19:55:06,081 INFO L87 Difference]: Start difference. First operand 55 states and 63 transitions. Second operand has 32 states, 25 states have (on average 2.16) internal successors, (54), 27 states have internal predecessors, (54), 14 states have call successors, (18), 7 states have call predecessors, (18), 10 states have return successors, (19), 14 states have call predecessors, (19), 14 states have call successors, (19) [2024-11-27 19:55:11,234 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-27 19:55:15,277 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-27 19:55:19,494 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-27 19:55:27,674 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-27 19:55:31,701 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-27 19:55:39,908 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-27 19:55:43,936 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-27 19:55:52,143 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-27 19:55:56,188 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-27 19:56:00,688 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-27 19:56:04,944 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-27 19:56:04,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 19:56:04,956 INFO L93 Difference]: Finished difference Result 65 states and 74 transitions. [2024-11-27 19:56:04,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-11-27 19:56:04,958 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 25 states have (on average 2.16) internal successors, (54), 27 states have internal predecessors, (54), 14 states have call successors, (18), 7 states have call predecessors, (18), 10 states have return successors, (19), 14 states have call predecessors, (19), 14 states have call successors, (19) Word has length 280 [2024-11-27 19:56:04,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 19:56:04,960 INFO L225 Difference]: With dead ends: 65 [2024-11-27 19:56:04,960 INFO L226 Difference]: Without dead ends: 58 [2024-11-27 19:56:04,961 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 567 GetRequests, 528 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 370 ImplicationChecksByTransitivity, 35.7s TimeCoverageRelationStatistics Valid=250, Invalid=1302, Unknown=8, NotChecked=0, Total=1560 [2024-11-27 19:56:04,962 INFO L435 NwaCegarLoop]: 16 mSDtfsCounter, 49 mSDsluCounter, 183 mSDsCounter, 0 mSdLazyCounter, 407 mSolverCounterSat, 42 mSolverCounterUnsat, 11 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 45.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 199 SdHoareTripleChecker+Invalid, 460 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 407 IncrementalHoareTripleChecker+Invalid, 11 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 45.6s IncrementalHoareTripleChecker+Time [2024-11-27 19:56:04,962 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [49 Valid, 199 Invalid, 460 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 407 Invalid, 11 Unknown, 0 Unchecked, 45.6s Time] [2024-11-27 19:56:04,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2024-11-27 19:56:04,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 53. [2024-11-27 19:56:04,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 33 states have (on average 1.1515151515151516) internal successors, (38), 35 states have internal predecessors, (38), 6 states have call successors, (6), 4 states have call predecessors, (6), 13 states have return successors, (16), 13 states have call predecessors, (16), 6 states have call successors, (16) [2024-11-27 19:56:04,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 60 transitions. [2024-11-27 19:56:04,980 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 60 transitions. Word has length 280 [2024-11-27 19:56:04,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-27 19:56:04,981 INFO L471 AbstractCegarLoop]: Abstraction has 53 states and 60 transitions. [2024-11-27 19:56:04,981 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 25 states have (on average 2.16) internal successors, (54), 27 states have internal predecessors, (54), 14 states have call successors, (18), 7 states have call predecessors, (18), 10 states have return successors, (19), 14 states have call predecessors, (19), 14 states have call successors, (19) [2024-11-27 19:56:04,981 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 60 transitions. [2024-11-27 19:56:04,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 370 [2024-11-27 19:56:04,989 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 19:56:04,989 INFO L218 NwaCegarLoop]: trace histogram [48, 48, 36, 36, 36, 16, 16, 12, 12, 12, 12, 12, 12, 12, 5, 5, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 19:56:05,012 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dab80af-618f-475b-9864-969976b18a30/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2024-11-27 19:56:05,189 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dab80af-618f-475b-9864-969976b18a30/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 19:56:05,190 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-27 19:56:05,191 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 19:56:05,191 INFO L85 PathProgramCache]: Analyzing trace with hash -13173049, now seen corresponding path program 3 times [2024-11-27 19:56:05,192 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-27 19:56:05,192 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1258061561] [2024-11-27 19:56:05,192 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-27 19:56:05,192 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 19:56:05,192 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dab80af-618f-475b-9864-969976b18a30/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 19:56:05,197 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dab80af-618f-475b-9864-969976b18a30/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 19:56:05,199 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dab80af-618f-475b-9864-969976b18a30/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2024-11-27 19:56:05,893 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2024-11-27 19:56:05,893 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 19:56:05,900 INFO L256 TraceCheckSpWp]: Trace formula consists of 449 conjuncts, 36 conjuncts are in the unsatisfiable core [2024-11-27 19:56:05,915 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 19:56:05,956 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 19:56:27,164 INFO L134 CoverageAnalysis]: Checked inductivity of 5878 backedges. 1101 proven. 15 refuted. 0 times theorem prover too weak. 4762 trivial. 0 not checked. [2024-11-27 19:56:27,164 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-27 19:56:38,198 INFO L134 CoverageAnalysis]: Checked inductivity of 5878 backedges. 290 proven. 33 refuted. 0 times theorem prover too weak. 5555 trivial. 0 not checked. [2024-11-27 19:56:38,198 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-27 19:56:38,198 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1258061561] [2024-11-27 19:56:38,199 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1258061561] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-27 19:56:38,199 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-27 19:56:38,199 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 19] total 32 [2024-11-27 19:56:38,199 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1957461114] [2024-11-27 19:56:38,199 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-27 19:56:38,201 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2024-11-27 19:56:38,201 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-27 19:56:38,202 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2024-11-27 19:56:38,202 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=148, Invalid=839, Unknown=5, NotChecked=0, Total=992 [2024-11-27 19:56:38,203 INFO L87 Difference]: Start difference. First operand 53 states and 60 transitions. Second operand has 32 states, 25 states have (on average 2.36) internal successors, (59), 27 states have internal predecessors, (59), 15 states have call successors, (21), 8 states have call predecessors, (21), 11 states have return successors, (22), 14 states have call predecessors, (22), 15 states have call successors, (22) [2024-11-27 19:56:42,267 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-27 19:56:47,823 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-27 19:56:51,891 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-27 19:56:56,063 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-27 19:57:04,246 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-27 19:57:08,310 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-27 19:57:16,524 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-27 19:57:20,581 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-27 19:57:28,812 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-27 19:57:32,878 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-27 19:57:37,309 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-27 19:57:41,676 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-27 19:57:42,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 19:57:42,019 INFO L93 Difference]: Finished difference Result 115 states and 146 transitions. [2024-11-27 19:57:42,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-11-27 19:57:42,021 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 25 states have (on average 2.36) internal successors, (59), 27 states have internal predecessors, (59), 15 states have call successors, (21), 8 states have call predecessors, (21), 11 states have return successors, (22), 14 states have call predecessors, (22), 15 states have call successors, (22) Word has length 369 [2024-11-27 19:57:42,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 19:57:42,023 INFO L225 Difference]: With dead ends: 115 [2024-11-27 19:57:42,023 INFO L226 Difference]: Without dead ends: 65 [2024-11-27 19:57:42,024 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 746 GetRequests, 705 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 393 ImplicationChecksByTransitivity, 36.4s TimeCoverageRelationStatistics Valid=279, Invalid=1435, Unknown=8, NotChecked=0, Total=1722 [2024-11-27 19:57:42,025 INFO L435 NwaCegarLoop]: 26 mSDtfsCounter, 58 mSDsluCounter, 304 mSDsCounter, 0 mSdLazyCounter, 411 mSolverCounterSat, 52 mSolverCounterUnsat, 12 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 49.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 330 SdHoareTripleChecker+Invalid, 475 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 411 IncrementalHoareTripleChecker+Invalid, 12 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 50.0s IncrementalHoareTripleChecker+Time [2024-11-27 19:57:42,026 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [58 Valid, 330 Invalid, 475 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 411 Invalid, 12 Unknown, 0 Unchecked, 50.0s Time] [2024-11-27 19:57:42,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2024-11-27 19:57:42,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 57. [2024-11-27 19:57:42,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 36 states have (on average 1.1388888888888888) internal successors, (41), 37 states have internal predecessors, (41), 6 states have call successors, (6), 5 states have call predecessors, (6), 14 states have return successors, (17), 14 states have call predecessors, (17), 6 states have call successors, (17) [2024-11-27 19:57:42,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 64 transitions. [2024-11-27 19:57:42,045 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 64 transitions. Word has length 369 [2024-11-27 19:57:42,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-27 19:57:42,046 INFO L471 AbstractCegarLoop]: Abstraction has 57 states and 64 transitions. [2024-11-27 19:57:42,046 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 25 states have (on average 2.36) internal successors, (59), 27 states have internal predecessors, (59), 15 states have call successors, (21), 8 states have call predecessors, (21), 11 states have return successors, (22), 14 states have call predecessors, (22), 15 states have call successors, (22) [2024-11-27 19:57:42,046 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 64 transitions. [2024-11-27 19:57:42,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 474 [2024-11-27 19:57:42,051 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 19:57:42,051 INFO L218 NwaCegarLoop]: trace histogram [64, 64, 48, 48, 48, 20, 20, 16, 16, 16, 16, 16, 16, 16, 5, 5, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 19:57:42,068 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dab80af-618f-475b-9864-969976b18a30/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2024-11-27 19:57:42,251 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dab80af-618f-475b-9864-969976b18a30/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 19:57:42,252 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-27 19:57:42,252 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 19:57:42,253 INFO L85 PathProgramCache]: Analyzing trace with hash -31777977, now seen corresponding path program 4 times [2024-11-27 19:57:42,253 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-27 19:57:42,253 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1720304489] [2024-11-27 19:57:42,254 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-27 19:57:42,254 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 19:57:42,254 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dab80af-618f-475b-9864-969976b18a30/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 19:57:42,256 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dab80af-618f-475b-9864-969976b18a30/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 19:57:42,258 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dab80af-618f-475b-9864-969976b18a30/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2024-11-27 19:57:42,924 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-27 19:57:42,924 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 19:57:42,942 INFO L256 TraceCheckSpWp]: Trace formula consists of 1373 conjuncts, 43 conjuncts are in the unsatisfiable core [2024-11-27 19:57:42,964 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 19:57:42,971 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 19:57:43,881 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 19 treesize of output 11 [2024-11-27 19:57:44,012 INFO L134 CoverageAnalysis]: Checked inductivity of 10370 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 10343 trivial. 0 not checked. [2024-11-27 19:57:44,012 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-27 19:57:47,012 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 7 treesize of output 3 [2024-11-27 19:57:48,229 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-27 19:57:48,230 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1720304489] [2024-11-27 19:57:48,230 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1720304489] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-27 19:57:48,230 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1016615168] [2024-11-27 19:57:48,230 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-27 19:57:48,230 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-11-27 19:57:48,230 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dab80af-618f-475b-9864-969976b18a30/bin/uautomizer-verify-aQ6SnzHsRB/cvc4 [2024-11-27 19:57:48,232 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dab80af-618f-475b-9864-969976b18a30/bin/uautomizer-verify-aQ6SnzHsRB/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2024-11-27 19:57:48,234 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dab80af-618f-475b-9864-969976b18a30/bin/uautomizer-verify-aQ6SnzHsRB/cvc4 --incremental --print-success --lang smt (22)] Waiting until timeout for monitored process [2024-11-27 19:57:49,935 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-27 19:57:49,935 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 19:57:49,982 INFO L256 TraceCheckSpWp]: Trace formula consists of 1373 conjuncts, 117 conjuncts are in the unsatisfiable core [2024-11-27 19:57:50,002 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 19:57:50,024 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 19:57:50,447 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 19:57:50,918 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 19:57:51,536 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 7 treesize of output 3 [2024-11-27 19:57:51,976 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 7 treesize of output 3 [2024-11-27 19:57:52,315 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 19 treesize of output 11 [2024-11-27 19:57:52,451 INFO L134 CoverageAnalysis]: Checked inductivity of 10370 backedges. 0 proven. 596 refuted. 0 times theorem prover too weak. 9774 trivial. 0 not checked. [2024-11-27 19:57:52,451 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-27 19:57:56,780 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 7 treesize of output 3 [2024-11-27 19:57:57,766 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1016615168] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-27 19:57:57,766 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-27 19:57:57,767 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 22] total 24 [2024-11-27 19:57:57,767 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1787694048] [2024-11-27 19:57:57,767 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-27 19:57:57,768 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-11-27 19:57:57,768 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-27 19:57:57,769 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-11-27 19:57:57,769 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=785, Unknown=0, NotChecked=0, Total=870 [2024-11-27 19:57:57,770 INFO L87 Difference]: Start difference. First operand 57 states and 64 transitions. Second operand has 24 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 20 states have internal predecessors, (39), 11 states have call successors, (15), 4 states have call predecessors, (15), 6 states have return successors, (15), 9 states have call predecessors, (15), 11 states have call successors, (15) [2024-11-27 19:58:01,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 19:58:01,523 INFO L93 Difference]: Finished difference Result 66 states and 75 transitions. [2024-11-27 19:58:01,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2024-11-27 19:58:01,525 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 20 states have internal predecessors, (39), 11 states have call successors, (15), 4 states have call predecessors, (15), 6 states have return successors, (15), 9 states have call predecessors, (15), 11 states have call successors, (15) Word has length 473 [2024-11-27 19:58:01,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 19:58:01,529 INFO L225 Difference]: With dead ends: 66 [2024-11-27 19:58:01,529 INFO L226 Difference]: Without dead ends: 61 [2024-11-27 19:58:01,530 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 981 GetRequests, 942 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 289 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=155, Invalid=1405, Unknown=0, NotChecked=0, Total=1560 [2024-11-27 19:58:01,531 INFO L435 NwaCegarLoop]: 16 mSDtfsCounter, 45 mSDsluCounter, 186 mSDsCounter, 0 mSdLazyCounter, 591 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 202 SdHoareTripleChecker+Invalid, 619 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 591 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2024-11-27 19:58:01,532 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [45 Valid, 202 Invalid, 619 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 591 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2024-11-27 19:58:01,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2024-11-27 19:58:01,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 61. [2024-11-27 19:58:01,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 39 states have (on average 1.1282051282051282) internal successors, (44), 39 states have internal predecessors, (44), 6 states have call successors, (6), 5 states have call predecessors, (6), 15 states have return successors, (19), 16 states have call predecessors, (19), 6 states have call successors, (19) [2024-11-27 19:58:01,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 69 transitions. [2024-11-27 19:58:01,551 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 69 transitions. Word has length 473 [2024-11-27 19:58:01,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-27 19:58:01,553 INFO L471 AbstractCegarLoop]: Abstraction has 61 states and 69 transitions. [2024-11-27 19:58:01,553 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 20 states have internal predecessors, (39), 11 states have call successors, (15), 4 states have call predecessors, (15), 6 states have return successors, (15), 9 states have call predecessors, (15), 11 states have call successors, (15) [2024-11-27 19:58:01,554 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 69 transitions. [2024-11-27 19:58:01,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 474 [2024-11-27 19:58:01,558 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 19:58:01,558 INFO L218 NwaCegarLoop]: trace histogram [64, 64, 48, 48, 48, 20, 20, 16, 16, 16, 16, 16, 16, 16, 5, 5, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 19:58:01,576 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dab80af-618f-475b-9864-969976b18a30/bin/uautomizer-verify-aQ6SnzHsRB/cvc4 --incremental --print-success --lang smt (22)] Ended with exit code 0 [2024-11-27 19:58:01,775 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dab80af-618f-475b-9864-969976b18a30/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2024-11-27 19:58:01,959 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dab80af-618f-475b-9864-969976b18a30/bin/uautomizer-verify-aQ6SnzHsRB/cvc4 --incremental --print-success --lang smt,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dab80af-618f-475b-9864-969976b18a30/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 19:58:01,960 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-27 19:58:01,960 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 19:58:01,961 INFO L85 PathProgramCache]: Analyzing trace with hash -29929013, now seen corresponding path program 7 times [2024-11-27 19:58:01,962 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-27 19:58:01,962 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [650647005] [2024-11-27 19:58:01,962 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-27 19:58:01,962 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 19:58:01,963 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dab80af-618f-475b-9864-969976b18a30/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 19:58:01,969 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dab80af-618f-475b-9864-969976b18a30/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 19:58:01,970 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dab80af-618f-475b-9864-969976b18a30/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2024-11-27 19:58:02,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 19:58:02,683 INFO L256 TraceCheckSpWp]: Trace formula consists of 1379 conjuncts, 38 conjuncts are in the unsatisfiable core [2024-11-27 19:58:02,692 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 19:58:02,697 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 19:58:03,424 INFO L134 CoverageAnalysis]: Checked inductivity of 10370 backedges. 1159 proven. 15 refuted. 0 times theorem prover too weak. 9196 trivial. 0 not checked. [2024-11-27 19:58:03,424 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-27 19:58:14,740 INFO L134 CoverageAnalysis]: Checked inductivity of 10370 backedges. 16 proven. 1203 refuted. 0 times theorem prover too weak. 9151 trivial. 0 not checked. [2024-11-27 19:58:14,741 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-27 19:58:14,741 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [650647005] [2024-11-27 19:58:14,741 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [650647005] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-27 19:58:14,741 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-27 19:58:14,741 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 18] total 27 [2024-11-27 19:58:14,741 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [552343262] [2024-11-27 19:58:14,742 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-27 19:58:14,743 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2024-11-27 19:58:14,743 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-27 19:58:14,744 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2024-11-27 19:58:14,744 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=596, Unknown=0, NotChecked=0, Total=702 [2024-11-27 19:58:14,745 INFO L87 Difference]: Start difference. First operand 61 states and 69 transitions. Second operand has 27 states, 21 states have (on average 2.761904761904762) internal successors, (58), 22 states have internal predecessors, (58), 8 states have call successors, (19), 7 states have call predecessors, (19), 10 states have return successors, (22), 8 states have call predecessors, (22), 8 states have call successors, (22) [2024-11-27 19:58:16,598 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 19:58:16,598 INFO L93 Difference]: Finished difference Result 119 states and 146 transitions. [2024-11-27 19:58:16,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-27 19:58:16,599 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 21 states have (on average 2.761904761904762) internal successors, (58), 22 states have internal predecessors, (58), 8 states have call successors, (19), 7 states have call predecessors, (19), 10 states have return successors, (22), 8 states have call predecessors, (22), 8 states have call successors, (22) Word has length 473 [2024-11-27 19:58:16,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 19:58:16,601 INFO L225 Difference]: With dead ends: 119 [2024-11-27 19:58:16,601 INFO L226 Difference]: Without dead ends: 63 [2024-11-27 19:58:16,602 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 949 GetRequests, 919 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 188 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=165, Invalid=827, Unknown=0, NotChecked=0, Total=992 [2024-11-27 19:58:16,603 INFO L435 NwaCegarLoop]: 34 mSDtfsCounter, 27 mSDsluCounter, 345 mSDsCounter, 0 mSdLazyCounter, 257 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 379 SdHoareTripleChecker+Invalid, 276 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 257 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2024-11-27 19:58:16,603 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 379 Invalid, 276 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 257 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2024-11-27 19:58:16,604 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2024-11-27 19:58:16,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2024-11-27 19:58:16,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 40 states have (on average 1.125) internal successors, (45), 40 states have internal predecessors, (45), 6 states have call successors, (6), 5 states have call predecessors, (6), 16 states have return successors, (20), 17 states have call predecessors, (20), 6 states have call successors, (20) [2024-11-27 19:58:16,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 71 transitions. [2024-11-27 19:58:16,638 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 71 transitions. Word has length 473 [2024-11-27 19:58:16,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-27 19:58:16,639 INFO L471 AbstractCegarLoop]: Abstraction has 63 states and 71 transitions. [2024-11-27 19:58:16,639 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 21 states have (on average 2.761904761904762) internal successors, (58), 22 states have internal predecessors, (58), 8 states have call successors, (19), 7 states have call predecessors, (19), 10 states have return successors, (22), 8 states have call predecessors, (22), 8 states have call successors, (22) [2024-11-27 19:58:16,639 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 71 transitions. [2024-11-27 19:58:16,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 554 [2024-11-27 19:58:16,646 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 19:58:16,646 INFO L218 NwaCegarLoop]: trace histogram [80, 80, 64, 64, 64, 20, 20, 16, 16, 16, 16, 16, 16, 16, 5, 5, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 19:58:16,669 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dab80af-618f-475b-9864-969976b18a30/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2024-11-27 19:58:16,847 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dab80af-618f-475b-9864-969976b18a30/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 19:58:16,847 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-27 19:58:16,848 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 19:58:16,848 INFO L85 PathProgramCache]: Analyzing trace with hash 1145683403, now seen corresponding path program 8 times [2024-11-27 19:58:16,850 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-27 19:58:16,850 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1318721691] [2024-11-27 19:58:16,850 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-27 19:58:16,851 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 19:58:16,851 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dab80af-618f-475b-9864-969976b18a30/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 19:58:16,854 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dab80af-618f-475b-9864-969976b18a30/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 19:58:16,867 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dab80af-618f-475b-9864-969976b18a30/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2024-11-27 19:58:17,606 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-27 19:58:17,606 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 19:58:17,620 INFO L256 TraceCheckSpWp]: Trace formula consists of 1587 conjuncts, 46 conjuncts are in the unsatisfiable core [2024-11-27 19:58:17,633 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 19:58:17,641 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 19:58:18,518 INFO L134 CoverageAnalysis]: Checked inductivity of 15834 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 15810 trivial. 0 not checked. [2024-11-27 19:58:18,518 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-27 19:58:29,600 INFO L134 CoverageAnalysis]: Checked inductivity of 15834 backedges. 0 proven. 58 refuted. 0 times theorem prover too weak. 15776 trivial. 0 not checked. [2024-11-27 19:58:29,600 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-27 19:58:29,601 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1318721691] [2024-11-27 19:58:29,601 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1318721691] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-27 19:58:29,601 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-27 19:58:29,601 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 22] total 32 [2024-11-27 19:58:29,602 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2120592552] [2024-11-27 19:58:29,602 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-27 19:58:29,603 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2024-11-27 19:58:29,603 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-27 19:58:29,604 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2024-11-27 19:58:29,605 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=860, Unknown=0, NotChecked=0, Total=992 [2024-11-27 19:58:29,605 INFO L87 Difference]: Start difference. First operand 63 states and 71 transitions. Second operand has 32 states, 25 states have (on average 1.88) internal successors, (47), 26 states have internal predecessors, (47), 13 states have call successors, (15), 7 states have call predecessors, (15), 11 states have return successors, (18), 15 states have call predecessors, (18), 13 states have call successors, (18) [2024-11-27 19:58:32,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 19:58:32,490 INFO L93 Difference]: Finished difference Result 68 states and 75 transitions. [2024-11-27 19:58:32,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-11-27 19:58:32,492 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 25 states have (on average 1.88) internal successors, (47), 26 states have internal predecessors, (47), 13 states have call successors, (15), 7 states have call predecessors, (15), 11 states have return successors, (18), 15 states have call predecessors, (18), 13 states have call successors, (18) Word has length 553 [2024-11-27 19:58:32,493 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 19:58:32,493 INFO L225 Difference]: With dead ends: 68 [2024-11-27 19:58:32,493 INFO L226 Difference]: Without dead ends: 61 [2024-11-27 19:58:32,494 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 1110 GetRequests, 1074 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 273 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=220, Invalid=1186, Unknown=0, NotChecked=0, Total=1406 [2024-11-27 19:58:32,494 INFO L435 NwaCegarLoop]: 19 mSDtfsCounter, 44 mSDsluCounter, 257 mSDsCounter, 0 mSdLazyCounter, 503 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 276 SdHoareTripleChecker+Invalid, 536 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 503 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2024-11-27 19:58:32,495 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [47 Valid, 276 Invalid, 536 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 503 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2024-11-27 19:58:32,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2024-11-27 19:58:32,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 61. [2024-11-27 19:58:32,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 38 states have (on average 1.131578947368421) internal successors, (43), 39 states have internal predecessors, (43), 6 states have call successors, (6), 5 states have call predecessors, (6), 16 states have return successors, (19), 16 states have call predecessors, (19), 6 states have call successors, (19) [2024-11-27 19:58:32,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 68 transitions. [2024-11-27 19:58:32,510 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 68 transitions. Word has length 553 [2024-11-27 19:58:32,511 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-27 19:58:32,511 INFO L471 AbstractCegarLoop]: Abstraction has 61 states and 68 transitions. [2024-11-27 19:58:32,511 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 25 states have (on average 1.88) internal successors, (47), 26 states have internal predecessors, (47), 13 states have call successors, (15), 7 states have call predecessors, (15), 11 states have return successors, (18), 15 states have call predecessors, (18), 13 states have call successors, (18) [2024-11-27 19:58:32,512 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 68 transitions. [2024-11-27 19:58:32,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 689 [2024-11-27 19:58:32,517 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 19:58:32,518 INFO L218 NwaCegarLoop]: trace histogram [100, 100, 80, 80, 80, 25, 25, 20, 20, 20, 20, 20, 20, 20, 6, 6, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 19:58:32,537 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dab80af-618f-475b-9864-969976b18a30/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2024-11-27 19:58:32,718 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dab80af-618f-475b-9864-969976b18a30/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 19:58:32,718 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-27 19:58:32,719 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 19:58:32,719 INFO L85 PathProgramCache]: Analyzing trace with hash 692328668, now seen corresponding path program 5 times [2024-11-27 19:58:32,720 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-27 19:58:32,720 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1102085279] [2024-11-27 19:58:32,720 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-27 19:58:32,720 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 19:58:32,720 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dab80af-618f-475b-9864-969976b18a30/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 19:58:32,722 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dab80af-618f-475b-9864-969976b18a30/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 19:58:32,723 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dab80af-618f-475b-9864-969976b18a30/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2024-11-27 19:58:33,594 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2024-11-27 19:58:33,594 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 19:58:33,601 INFO L256 TraceCheckSpWp]: Trace formula consists of 263 conjuncts, 47 conjuncts are in the unsatisfiable core [2024-11-27 19:58:33,612 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 19:58:33,620 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 19:58:34,488 INFO L134 CoverageAnalysis]: Checked inductivity of 24820 backedges. 6419 proven. 24 refuted. 0 times theorem prover too weak. 18377 trivial. 0 not checked. [2024-11-27 19:58:34,489 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-27 19:58:50,837 INFO L134 CoverageAnalysis]: Checked inductivity of 24820 backedges. 260 proven. 2197 refuted. 0 times theorem prover too weak. 22363 trivial. 0 not checked. [2024-11-27 19:58:50,837 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-27 19:58:50,837 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1102085279] [2024-11-27 19:58:50,837 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1102085279] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-27 19:58:50,837 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-27 19:58:50,838 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 22] total 32 [2024-11-27 19:58:50,838 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [908126208] [2024-11-27 19:58:50,838 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-27 19:58:50,839 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2024-11-27 19:58:50,840 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-27 19:58:50,841 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2024-11-27 19:58:50,841 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=860, Unknown=0, NotChecked=0, Total=992 [2024-11-27 19:58:50,842 INFO L87 Difference]: Start difference. First operand 61 states and 68 transitions. Second operand has 32 states, 25 states have (on average 2.48) internal successors, (62), 26 states have internal predecessors, (62), 9 states have call successors, (20), 8 states have call predecessors, (20), 12 states have return successors, (25), 10 states have call predecessors, (25), 9 states have call successors, (25) [2024-11-27 19:58:52,877 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 19:58:52,877 INFO L93 Difference]: Finished difference Result 119 states and 144 transitions. [2024-11-27 19:58:52,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-11-27 19:58:52,882 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 25 states have (on average 2.48) internal successors, (62), 26 states have internal predecessors, (62), 9 states have call successors, (20), 8 states have call predecessors, (20), 12 states have return successors, (25), 10 states have call predecessors, (25), 9 states have call successors, (25) Word has length 688 [2024-11-27 19:58:52,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 19:58:52,883 INFO L225 Difference]: With dead ends: 119 [2024-11-27 19:58:52,883 INFO L226 Difference]: Without dead ends: 63 [2024-11-27 19:58:52,884 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 1380 GetRequests, 1344 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 276 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=212, Invalid=1194, Unknown=0, NotChecked=0, Total=1406 [2024-11-27 19:58:52,885 INFO L435 NwaCegarLoop]: 35 mSDtfsCounter, 37 mSDsluCounter, 396 mSDsCounter, 0 mSdLazyCounter, 306 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 431 SdHoareTripleChecker+Invalid, 332 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 306 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2024-11-27 19:58:52,889 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [37 Valid, 431 Invalid, 332 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 306 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2024-11-27 19:58:52,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2024-11-27 19:58:52,911 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2024-11-27 19:58:52,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 39 states have (on average 1.1282051282051282) internal successors, (44), 40 states have internal predecessors, (44), 6 states have call successors, (6), 5 states have call predecessors, (6), 17 states have return successors, (20), 17 states have call predecessors, (20), 6 states have call successors, (20) [2024-11-27 19:58:52,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 70 transitions. [2024-11-27 19:58:52,912 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 70 transitions. Word has length 688 [2024-11-27 19:58:52,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-27 19:58:52,913 INFO L471 AbstractCegarLoop]: Abstraction has 63 states and 70 transitions. [2024-11-27 19:58:52,913 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 25 states have (on average 2.48) internal successors, (62), 26 states have internal predecessors, (62), 9 states have call successors, (20), 8 states have call predecessors, (20), 12 states have return successors, (25), 10 states have call predecessors, (25), 9 states have call successors, (25) [2024-11-27 19:58:52,913 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 70 transitions. [2024-11-27 19:58:52,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 789 [2024-11-27 19:58:52,936 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 19:58:52,936 INFO L218 NwaCegarLoop]: trace histogram [120, 120, 100, 100, 100, 25, 25, 20, 20, 20, 20, 20, 20, 20, 6, 6, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 19:58:52,947 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dab80af-618f-475b-9864-969976b18a30/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2024-11-27 19:58:53,136 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dab80af-618f-475b-9864-969976b18a30/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 19:58:53,137 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-27 19:58:53,137 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 19:58:53,138 INFO L85 PathProgramCache]: Analyzing trace with hash 861864080, now seen corresponding path program 6 times [2024-11-27 19:58:53,138 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-27 19:58:53,138 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1381599470] [2024-11-27 19:58:53,139 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-27 19:58:53,139 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 19:58:53,139 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dab80af-618f-475b-9864-969976b18a30/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 19:58:53,141 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dab80af-618f-475b-9864-969976b18a30/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 19:58:53,142 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dab80af-618f-475b-9864-969976b18a30/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process