./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-examples/standard_palindrome_ground.i --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_5409893d-2b28-4e79-a8a0-3ccb4013aaec/bin/uautomizer-verify-aQ6SnzHsRB/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5409893d-2b28-4e79-a8a0-3ccb4013aaec/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_5409893d-2b28-4e79-a8a0-3ccb4013aaec/bin/uautomizer-verify-aQ6SnzHsRB/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5409893d-2b28-4e79-a8a0-3ccb4013aaec/bin/uautomizer-verify-aQ6SnzHsRB/config/AutomizerReach.xml -i ../../sv-benchmarks/c/array-examples/standard_palindrome_ground.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5409893d-2b28-4e79-a8a0-3ccb4013aaec/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_5409893d-2b28-4e79-a8a0-3ccb4013aaec/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 270a2842345dc5b188d8b64dce3436ccc5910bc1472a41053bc5c00e7f4ceeb6 --- Real Ultimate output --- This is Ultimate 0.3.0-dev-d790fec [2024-11-28 04:31:52,951 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-28 04:31:53,028 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5409893d-2b28-4e79-a8a0-3ccb4013aaec/bin/uautomizer-verify-aQ6SnzHsRB/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-11-28 04:31:53,037 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-28 04:31:53,037 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-28 04:31:53,079 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-28 04:31:53,079 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-28 04:31:53,079 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-28 04:31:53,080 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-28 04:31:53,081 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-28 04:31:53,082 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-28 04:31:53,082 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-28 04:31:53,083 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-28 04:31:53,083 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-28 04:31:53,084 INFO L153 SettingsManager]: * Use SBE=true [2024-11-28 04:31:53,084 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-28 04:31:53,084 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-28 04:31:53,084 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-28 04:31:53,084 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-28 04:31:53,085 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-28 04:31:53,085 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-28 04:31:53,085 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-28 04:31:53,085 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-28 04:31:53,085 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-28 04:31:53,085 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-28 04:31:53,085 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-28 04:31:53,086 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2024-11-28 04:31:53,086 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-28 04:31:53,086 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2024-11-28 04:31:53,086 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-28 04:31:53,086 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-28 04:31:53,086 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-28 04:31:53,086 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-28 04:31:53,086 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-28 04:31:53,086 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-28 04:31:53,087 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-28 04:31:53,087 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-28 04:31:53,088 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-28 04:31:53,088 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-28 04:31:53,088 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-28 04:31:53,088 INFO L153 SettingsManager]: * Compute procedure contracts=false [2024-11-28 04:31:53,088 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-28 04:31:53,088 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-28 04:31:53,089 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-28 04:31:53,089 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-28 04:31:53,089 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-28 04:31:53,089 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-28 04:31:53,089 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-28 04:31:53,089 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_5409893d-2b28-4e79-a8a0-3ccb4013aaec/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 -> 270a2842345dc5b188d8b64dce3436ccc5910bc1472a41053bc5c00e7f4ceeb6 [2024-11-28 04:31:53,398 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-28 04:31:53,409 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-28 04:31:53,412 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-28 04:31:53,413 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-28 04:31:53,414 INFO L274 PluginConnector]: CDTParser initialized [2024-11-28 04:31:53,416 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5409893d-2b28-4e79-a8a0-3ccb4013aaec/bin/uautomizer-verify-aQ6SnzHsRB/../../sv-benchmarks/c/array-examples/standard_palindrome_ground.i [2024-11-28 04:31:56,499 INFO L533 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5409893d-2b28-4e79-a8a0-3ccb4013aaec/bin/uautomizer-verify-aQ6SnzHsRB/data/56e87a364/e3b0d44b18214f2aa8d18ffd8d94d5e1/FLAG7bd94c51a [2024-11-28 04:31:56,815 INFO L384 CDTParser]: Found 1 translation units. [2024-11-28 04:31:56,817 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5409893d-2b28-4e79-a8a0-3ccb4013aaec/sv-benchmarks/c/array-examples/standard_palindrome_ground.i [2024-11-28 04:31:56,827 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5409893d-2b28-4e79-a8a0-3ccb4013aaec/bin/uautomizer-verify-aQ6SnzHsRB/data/56e87a364/e3b0d44b18214f2aa8d18ffd8d94d5e1/FLAG7bd94c51a [2024-11-28 04:31:56,852 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5409893d-2b28-4e79-a8a0-3ccb4013aaec/bin/uautomizer-verify-aQ6SnzHsRB/data/56e87a364/e3b0d44b18214f2aa8d18ffd8d94d5e1 [2024-11-28 04:31:56,855 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-28 04:31:56,857 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-28 04:31:56,858 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-28 04:31:56,859 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-28 04:31:56,864 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-28 04:31:56,865 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 04:31:56" (1/1) ... [2024-11-28 04:31:56,867 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@42c2ec8f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:31:56, skipping insertion in model container [2024-11-28 04:31:56,867 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 04:31:56" (1/1) ... [2024-11-28 04:31:56,885 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-28 04:31:57,055 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_5409893d-2b28-4e79-a8a0-3ccb4013aaec/sv-benchmarks/c/array-examples/standard_palindrome_ground.i[819,832] [2024-11-28 04:31:57,071 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-28 04:31:57,081 INFO L200 MainTranslator]: Completed pre-run [2024-11-28 04:31:57,090 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_5409893d-2b28-4e79-a8a0-3ccb4013aaec/sv-benchmarks/c/array-examples/standard_palindrome_ground.i[819,832] [2024-11-28 04:31:57,097 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-28 04:31:57,114 INFO L204 MainTranslator]: Completed translation [2024-11-28 04:31:57,114 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:31:57 WrapperNode [2024-11-28 04:31:57,114 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-28 04:31:57,115 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-28 04:31:57,116 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-28 04:31:57,116 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-28 04:31:57,123 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:31:57" (1/1) ... [2024-11-28 04:31:57,130 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:31:57" (1/1) ... [2024-11-28 04:31:57,148 INFO L138 Inliner]: procedures = 16, calls = 15, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 55 [2024-11-28 04:31:57,148 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-28 04:31:57,150 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-28 04:31:57,151 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-28 04:31:57,151 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-28 04:31:57,162 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:31:57" (1/1) ... [2024-11-28 04:31:57,163 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:31:57" (1/1) ... [2024-11-28 04:31:57,169 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:31:57" (1/1) ... [2024-11-28 04:31:57,188 INFO L175 MemorySlicer]: Split 7 memory accesses to 2 slices as follows [2, 5]. 71 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0]. The 2 writes are split as follows [0, 2]. [2024-11-28 04:31:57,189 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:31:57" (1/1) ... [2024-11-28 04:31:57,189 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:31:57" (1/1) ... [2024-11-28 04:31:57,202 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:31:57" (1/1) ... [2024-11-28 04:31:57,203 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:31:57" (1/1) ... [2024-11-28 04:31:57,209 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:31:57" (1/1) ... [2024-11-28 04:31:57,212 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:31:57" (1/1) ... [2024-11-28 04:31:57,213 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:31:57" (1/1) ... [2024-11-28 04:31:57,218 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-28 04:31:57,219 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-28 04:31:57,219 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-28 04:31:57,219 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-28 04:31:57,220 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:31:57" (1/1) ... [2024-11-28 04:31:57,232 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-28 04:31:57,247 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5409893d-2b28-4e79-a8a0-3ccb4013aaec/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:31:57,260 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5409893d-2b28-4e79-a8a0-3ccb4013aaec/bin/uautomizer-verify-aQ6SnzHsRB/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-11-28 04:31:57,265 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5409893d-2b28-4e79-a8a0-3ccb4013aaec/bin/uautomizer-verify-aQ6SnzHsRB/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-11-28 04:31:57,288 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-28 04:31:57,288 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-28 04:31:57,288 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-11-28 04:31:57,289 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-11-28 04:31:57,289 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-11-28 04:31:57,289 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-11-28 04:31:57,289 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-28 04:31:57,289 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-28 04:31:57,289 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-11-28 04:31:57,289 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-11-28 04:31:57,289 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-11-28 04:31:57,357 INFO L234 CfgBuilder]: Building ICFG [2024-11-28 04:31:57,359 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-28 04:31:57,534 INFO L? ?]: Removed 10 outVars from TransFormulas that were not future-live. [2024-11-28 04:31:57,534 INFO L283 CfgBuilder]: Performing block encoding [2024-11-28 04:31:57,544 INFO L307 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-28 04:31:57,545 INFO L312 CfgBuilder]: Removed 3 assume(true) statements. [2024-11-28 04:31:57,545 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 04:31:57 BoogieIcfgContainer [2024-11-28 04:31:57,546 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-28 04:31:57,548 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-28 04:31:57,548 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-28 04:31:57,554 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-28 04:31:57,554 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.11 04:31:56" (1/3) ... [2024-11-28 04:31:57,555 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@57a15d64 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 04:31:57, skipping insertion in model container [2024-11-28 04:31:57,555 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:31:57" (2/3) ... [2024-11-28 04:31:57,556 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@57a15d64 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 04:31:57, skipping insertion in model container [2024-11-28 04:31:57,556 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 04:31:57" (3/3) ... [2024-11-28 04:31:57,557 INFO L128 eAbstractionObserver]: Analyzing ICFG standard_palindrome_ground.i [2024-11-28 04:31:57,576 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-28 04:31:57,579 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG standard_palindrome_ground.i that has 1 procedures, 18 locations, 1 initial locations, 3 loop locations, and 1 error locations. [2024-11-28 04:31:57,644 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-28 04:31:57,661 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;@7d8c3e14, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-28 04:31:57,661 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-11-28 04:31:57,665 INFO L276 IsEmpty]: Start isEmpty. Operand has 18 states, 16 states have (on average 1.5) internal successors, (24), 17 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 04:31:57,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2024-11-28 04:31:57,671 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 04:31:57,672 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 04:31:57,672 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 04:31:57,677 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:31:57,678 INFO L85 PathProgramCache]: Analyzing trace with hash 1162415733, now seen corresponding path program 1 times [2024-11-28 04:31:57,687 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 04:31:57,688 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [263314653] [2024-11-28 04:31:57,688 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 04:31:57,689 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 04:31:57,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 04:31:57,899 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 04:31:57,900 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 04:31:57,900 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [263314653] [2024-11-28 04:31:57,901 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [263314653] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 04:31:57,901 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 04:31:57,901 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-28 04:31:57,908 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1219576389] [2024-11-28 04:31:57,908 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 04:31:57,912 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-28 04:31:57,912 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 04:31:57,930 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-28 04:31:57,930 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-28 04:31:57,932 INFO L87 Difference]: Start difference. First operand has 18 states, 16 states have (on average 1.5) internal successors, (24), 17 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 04:31:57,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 04:31:57,970 INFO L93 Difference]: Finished difference Result 36 states and 50 transitions. [2024-11-28 04:31:57,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-28 04:31:57,972 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2024-11-28 04:31:57,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 04:31:57,979 INFO L225 Difference]: With dead ends: 36 [2024-11-28 04:31:57,979 INFO L226 Difference]: Without dead ends: 18 [2024-11-28 04:31:57,981 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-28 04:31:57,984 INFO L435 NwaCegarLoop]: 16 mSDtfsCounter, 2 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-28 04:31:57,985 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 27 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-28 04:31:57,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2024-11-28 04:31:58,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 16. [2024-11-28 04:31:58,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 15 states have (on average 1.2) internal successors, (18), 15 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 04:31:58,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 18 transitions. [2024-11-28 04:31:58,014 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 18 transitions. Word has length 10 [2024-11-28 04:31:58,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 04:31:58,015 INFO L471 AbstractCegarLoop]: Abstraction has 16 states and 18 transitions. [2024-11-28 04:31:58,015 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 04:31:58,015 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 18 transitions. [2024-11-28 04:31:58,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2024-11-28 04:31:58,016 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 04:31:58,016 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 04:31:58,016 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-28 04:31:58,016 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 04:31:58,017 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:31:58,017 INFO L85 PathProgramCache]: Analyzing trace with hash -1246476483, now seen corresponding path program 1 times [2024-11-28 04:31:58,017 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 04:31:58,017 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1693896755] [2024-11-28 04:31:58,017 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 04:31:58,017 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 04:31:58,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 04:31:58,137 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-28 04:31:58,138 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 04:31:58,138 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1693896755] [2024-11-28 04:31:58,138 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1693896755] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 04:31:58,138 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [659982954] [2024-11-28 04:31:58,138 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 04:31:58,138 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:31:58,138 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5409893d-2b28-4e79-a8a0-3ccb4013aaec/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:31:58,140 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5409893d-2b28-4e79-a8a0-3ccb4013aaec/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 04:31:58,143 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5409893d-2b28-4e79-a8a0-3ccb4013aaec/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-28 04:31:58,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 04:31:58,218 INFO L256 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-11-28 04:31:58,221 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:31:58,263 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-28 04:31:58,263 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 04:31:58,337 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-28 04:31:58,337 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [659982954] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 04:31:58,337 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 04:31:58,338 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2024-11-28 04:31:58,338 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [414246843] [2024-11-28 04:31:58,339 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 04:31:58,342 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-28 04:31:58,342 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 04:31:58,343 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-28 04:31:58,343 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-11-28 04:31:58,343 INFO L87 Difference]: Start difference. First operand 16 states and 18 transitions. Second operand has 7 states, 7 states have (on average 3.0) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 04:31:58,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 04:31:58,430 INFO L93 Difference]: Finished difference Result 37 states and 45 transitions. [2024-11-28 04:31:58,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-28 04:31:58,434 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.0) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2024-11-28 04:31:58,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 04:31:58,435 INFO L225 Difference]: With dead ends: 37 [2024-11-28 04:31:58,435 INFO L226 Difference]: Without dead ends: 26 [2024-11-28 04:31:58,435 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-11-28 04:31:58,436 INFO L435 NwaCegarLoop]: 11 mSDtfsCounter, 11 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-28 04:31:58,437 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 19 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-28 04:31:58,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2024-11-28 04:31:58,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 24. [2024-11-28 04:31:58,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 23 states have (on average 1.1304347826086956) internal successors, (26), 23 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 04:31:58,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 26 transitions. [2024-11-28 04:31:58,447 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 26 transitions. Word has length 14 [2024-11-28 04:31:58,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 04:31:58,448 INFO L471 AbstractCegarLoop]: Abstraction has 24 states and 26 transitions. [2024-11-28 04:31:58,448 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.0) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 04:31:58,448 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 26 transitions. [2024-11-28 04:31:58,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2024-11-28 04:31:58,450 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 04:31:58,450 INFO L218 NwaCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 04:31:58,458 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5409893d-2b28-4e79-a8a0-3ccb4013aaec/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-28 04:31:58,654 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5409893d-2b28-4e79-a8a0-3ccb4013aaec/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:31:58,654 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 04:31:58,655 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:31:58,655 INFO L85 PathProgramCache]: Analyzing trace with hash -792374387, now seen corresponding path program 2 times [2024-11-28 04:31:58,655 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 04:31:58,655 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [134548104] [2024-11-28 04:31:58,655 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 04:31:58,656 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 04:31:58,690 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 04:31:58,690 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 04:31:58,870 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-28 04:31:58,870 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 04:31:58,871 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [134548104] [2024-11-28 04:31:58,871 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [134548104] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 04:31:58,871 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [425931248] [2024-11-28 04:31:58,871 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 04:31:58,871 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:31:58,871 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5409893d-2b28-4e79-a8a0-3ccb4013aaec/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:31:58,873 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5409893d-2b28-4e79-a8a0-3ccb4013aaec/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 04:31:58,877 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5409893d-2b28-4e79-a8a0-3ccb4013aaec/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-28 04:31:58,967 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 04:31:58,968 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 04:31:58,970 INFO L256 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-28 04:31:58,971 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:31:59,016 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-28 04:31:59,016 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 04:31:59,121 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-28 04:31:59,121 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [425931248] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 04:31:59,121 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 04:31:59,121 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2024-11-28 04:31:59,122 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1019922548] [2024-11-28 04:31:59,122 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 04:31:59,122 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-11-28 04:31:59,122 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 04:31:59,123 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-11-28 04:31:59,123 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2024-11-28 04:31:59,123 INFO L87 Difference]: Start difference. First operand 24 states and 26 transitions. Second operand has 13 states, 13 states have (on average 2.5384615384615383) internal successors, (33), 13 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 04:31:59,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 04:31:59,225 INFO L93 Difference]: Finished difference Result 57 states and 70 transitions. [2024-11-28 04:31:59,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-11-28 04:31:59,225 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.5384615384615383) internal successors, (33), 13 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2024-11-28 04:31:59,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 04:31:59,226 INFO L225 Difference]: With dead ends: 57 [2024-11-28 04:31:59,226 INFO L226 Difference]: Without dead ends: 44 [2024-11-28 04:31:59,227 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2024-11-28 04:31:59,227 INFO L435 NwaCegarLoop]: 11 mSDtfsCounter, 20 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 69 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-28 04:31:59,228 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 27 Invalid, 69 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-28 04:31:59,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2024-11-28 04:31:59,233 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 42. [2024-11-28 04:31:59,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 41 states have (on average 1.0731707317073171) internal successors, (44), 41 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 04:31:59,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 44 transitions. [2024-11-28 04:31:59,234 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 44 transitions. Word has length 22 [2024-11-28 04:31:59,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 04:31:59,234 INFO L471 AbstractCegarLoop]: Abstraction has 42 states and 44 transitions. [2024-11-28 04:31:59,234 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.5384615384615383) internal successors, (33), 13 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 04:31:59,234 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 44 transitions. [2024-11-28 04:31:59,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2024-11-28 04:31:59,235 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 04:31:59,235 INFO L218 NwaCegarLoop]: trace histogram [10, 10, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 04:31:59,244 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5409893d-2b28-4e79-a8a0-3ccb4013aaec/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-11-28 04:31:59,439 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5409893d-2b28-4e79-a8a0-3ccb4013aaec/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2024-11-28 04:31:59,439 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 04:31:59,440 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:31:59,440 INFO L85 PathProgramCache]: Analyzing trace with hash 850616241, now seen corresponding path program 3 times [2024-11-28 04:31:59,440 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 04:31:59,440 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [314865592] [2024-11-28 04:31:59,440 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-28 04:31:59,440 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 04:31:59,497 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2024-11-28 04:31:59,498 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 04:31:59,688 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2024-11-28 04:31:59,689 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 04:31:59,689 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [314865592] [2024-11-28 04:31:59,689 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [314865592] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 04:31:59,690 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2073188514] [2024-11-28 04:31:59,690 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-28 04:31:59,691 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:31:59,691 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5409893d-2b28-4e79-a8a0-3ccb4013aaec/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:31:59,693 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5409893d-2b28-4e79-a8a0-3ccb4013aaec/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 04:31:59,695 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5409893d-2b28-4e79-a8a0-3ccb4013aaec/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-28 04:31:59,888 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2024-11-28 04:31:59,889 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 04:31:59,890 INFO L256 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-11-28 04:31:59,892 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:31:59,932 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2024-11-28 04:31:59,932 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 04:32:00,057 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2024-11-28 04:32:00,057 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2073188514] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 04:32:00,057 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 04:32:00,058 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 15 [2024-11-28 04:32:00,058 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [570255662] [2024-11-28 04:32:00,058 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 04:32:00,058 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-11-28 04:32:00,058 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 04:32:00,059 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-11-28 04:32:00,059 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2024-11-28 04:32:00,059 INFO L87 Difference]: Start difference. First operand 42 states and 44 transitions. Second operand has 15 states, 15 states have (on average 2.466666666666667) internal successors, (37), 15 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 04:32:00,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 04:32:00,214 INFO L93 Difference]: Finished difference Result 80 states and 92 transitions. [2024-11-28 04:32:00,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-11-28 04:32:00,216 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.466666666666667) internal successors, (37), 15 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2024-11-28 04:32:00,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 04:32:00,217 INFO L225 Difference]: With dead ends: 80 [2024-11-28 04:32:00,217 INFO L226 Difference]: Without dead ends: 61 [2024-11-28 04:32:00,218 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2024-11-28 04:32:00,218 INFO L435 NwaCegarLoop]: 12 mSDtfsCounter, 27 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 88 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-28 04:32:00,219 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 44 Invalid, 88 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 59 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-28 04:32:00,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2024-11-28 04:32:00,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 60. [2024-11-28 04:32:00,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 59 states have (on average 1.0508474576271187) internal successors, (62), 59 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 04:32:00,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 62 transitions. [2024-11-28 04:32:00,236 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 62 transitions. Word has length 40 [2024-11-28 04:32:00,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 04:32:00,236 INFO L471 AbstractCegarLoop]: Abstraction has 60 states and 62 transitions. [2024-11-28 04:32:00,237 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.466666666666667) internal successors, (37), 15 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 04:32:00,238 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 62 transitions. [2024-11-28 04:32:00,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2024-11-28 04:32:00,241 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 04:32:00,241 INFO L218 NwaCegarLoop]: trace histogram [12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 04:32:00,252 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5409893d-2b28-4e79-a8a0-3ccb4013aaec/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-11-28 04:32:00,442 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5409893d-2b28-4e79-a8a0-3ccb4013aaec/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:32:00,442 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 04:32:00,443 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:32:00,443 INFO L85 PathProgramCache]: Analyzing trace with hash -1610477611, now seen corresponding path program 4 times [2024-11-28 04:32:00,443 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 04:32:00,443 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1155138647] [2024-11-28 04:32:00,443 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-28 04:32:00,443 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 04:32:00,494 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-28 04:32:00,494 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 04:32:00,954 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2024-11-28 04:32:00,955 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 04:32:00,955 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1155138647] [2024-11-28 04:32:00,955 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1155138647] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 04:32:00,955 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [491902122] [2024-11-28 04:32:00,955 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-28 04:32:00,955 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:32:00,955 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5409893d-2b28-4e79-a8a0-3ccb4013aaec/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:32:00,958 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5409893d-2b28-4e79-a8a0-3ccb4013aaec/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 04:32:00,966 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5409893d-2b28-4e79-a8a0-3ccb4013aaec/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-28 04:32:01,112 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-28 04:32:01,112 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 04:32:01,114 INFO L256 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-11-28 04:32:01,121 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:32:01,233 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2024-11-28 04:32:01,233 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 04:32:01,707 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2024-11-28 04:32:01,707 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [491902122] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 04:32:01,708 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 04:32:01,708 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 29 [2024-11-28 04:32:01,708 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1549127464] [2024-11-28 04:32:01,708 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 04:32:01,709 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2024-11-28 04:32:01,709 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 04:32:01,710 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2024-11-28 04:32:01,710 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2024-11-28 04:32:01,711 INFO L87 Difference]: Start difference. First operand 60 states and 62 transitions. Second operand has 29 states, 29 states have (on average 2.2413793103448274) internal successors, (65), 29 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 04:32:01,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 04:32:01,968 INFO L93 Difference]: Finished difference Result 125 states and 144 transitions. [2024-11-28 04:32:01,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2024-11-28 04:32:01,969 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.2413793103448274) internal successors, (65), 29 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 58 [2024-11-28 04:32:01,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 04:32:01,970 INFO L225 Difference]: With dead ends: 125 [2024-11-28 04:32:01,971 INFO L226 Difference]: Without dead ends: 92 [2024-11-28 04:32:01,971 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2024-11-28 04:32:01,973 INFO L435 NwaCegarLoop]: 11 mSDtfsCounter, 61 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 95 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 159 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 95 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-28 04:32:01,973 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [61 Valid, 43 Invalid, 159 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 95 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-28 04:32:01,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2024-11-28 04:32:01,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 90. [2024-11-28 04:32:01,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 89 states have (on average 1.0337078651685394) internal successors, (92), 89 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 04:32:01,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 92 transitions. [2024-11-28 04:32:01,987 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 92 transitions. Word has length 58 [2024-11-28 04:32:01,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 04:32:01,988 INFO L471 AbstractCegarLoop]: Abstraction has 90 states and 92 transitions. [2024-11-28 04:32:01,988 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.2413793103448274) internal successors, (65), 29 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 04:32:01,988 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 92 transitions. [2024-11-28 04:32:01,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2024-11-28 04:32:01,989 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 04:32:01,989 INFO L218 NwaCegarLoop]: trace histogram [26, 26, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 04:32:02,001 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5409893d-2b28-4e79-a8a0-3ccb4013aaec/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-11-28 04:32:02,190 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5409893d-2b28-4e79-a8a0-3ccb4013aaec/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:32:02,190 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 04:32:02,191 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:32:02,191 INFO L85 PathProgramCache]: Analyzing trace with hash 586494993, now seen corresponding path program 5 times [2024-11-28 04:32:02,191 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 04:32:02,192 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1555996666] [2024-11-28 04:32:02,192 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-28 04:32:02,192 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 04:32:02,484 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 27 check-sat command(s) [2024-11-28 04:32:02,484 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 04:32:03,891 INFO L134 CoverageAnalysis]: Checked inductivity of 845 backedges. 0 proven. 676 refuted. 0 times theorem prover too weak. 169 trivial. 0 not checked. [2024-11-28 04:32:03,892 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 04:32:03,892 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1555996666] [2024-11-28 04:32:03,892 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1555996666] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 04:32:03,892 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [277836141] [2024-11-28 04:32:03,892 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-28 04:32:03,892 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:32:03,892 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5409893d-2b28-4e79-a8a0-3ccb4013aaec/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:32:03,894 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5409893d-2b28-4e79-a8a0-3ccb4013aaec/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 04:32:03,897 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5409893d-2b28-4e79-a8a0-3ccb4013aaec/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-28 04:32:33,475 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 27 check-sat command(s) [2024-11-28 04:32:33,476 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 04:32:33,503 INFO L256 TraceCheckSpWp]: Trace formula consists of 374 conjuncts, 15 conjuncts are in the unsatisfiable core [2024-11-28 04:32:33,507 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:32:33,578 INFO L134 CoverageAnalysis]: Checked inductivity of 845 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 676 trivial. 0 not checked. [2024-11-28 04:32:33,578 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 04:32:34,269 INFO L134 CoverageAnalysis]: Checked inductivity of 845 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 676 trivial. 0 not checked. [2024-11-28 04:32:34,269 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [277836141] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 04:32:34,270 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 04:32:34,270 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 16, 16] total 43 [2024-11-28 04:32:34,270 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1054588009] [2024-11-28 04:32:34,270 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 04:32:34,271 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2024-11-28 04:32:34,271 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 04:32:34,272 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2024-11-28 04:32:34,273 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=903, Invalid=903, Unknown=0, NotChecked=0, Total=1806 [2024-11-28 04:32:34,274 INFO L87 Difference]: Start difference. First operand 90 states and 92 transitions. Second operand has 43 states, 43 states have (on average 2.883720930232558) internal successors, (124), 43 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 04:32:34,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 04:32:34,757 INFO L93 Difference]: Finished difference Result 212 states and 258 transitions. [2024-11-28 04:32:34,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2024-11-28 04:32:34,758 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 2.883720930232558) internal successors, (124), 43 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 88 [2024-11-28 04:32:34,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 04:32:34,760 INFO L225 Difference]: With dead ends: 212 [2024-11-28 04:32:34,760 INFO L226 Difference]: Without dead ends: 177 [2024-11-28 04:32:34,761 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 203 GetRequests, 162 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=903, Invalid=903, Unknown=0, NotChecked=0, Total=1806 [2024-11-28 04:32:34,762 INFO L435 NwaCegarLoop]: 12 mSDtfsCounter, 62 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 177 mSolverCounterSat, 72 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 249 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 72 IncrementalHoareTripleChecker+Valid, 177 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-28 04:32:34,762 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [62 Valid, 52 Invalid, 249 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [72 Valid, 177 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-11-28 04:32:34,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2024-11-28 04:32:34,783 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 176. [2024-11-28 04:32:34,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 176 states, 175 states have (on average 1.0171428571428571) internal successors, (178), 175 states have internal predecessors, (178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 04:32:34,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 178 transitions. [2024-11-28 04:32:34,786 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 178 transitions. Word has length 88 [2024-11-28 04:32:34,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 04:32:34,786 INFO L471 AbstractCegarLoop]: Abstraction has 176 states and 178 transitions. [2024-11-28 04:32:34,786 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 2.883720930232558) internal successors, (124), 43 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 04:32:34,787 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 178 transitions. [2024-11-28 04:32:34,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 175 [2024-11-28 04:32:34,788 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 04:32:34,789 INFO L218 NwaCegarLoop]: trace histogram [41, 41, 41, 41, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 04:32:34,813 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5409893d-2b28-4e79-a8a0-3ccb4013aaec/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-11-28 04:32:34,990 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5409893d-2b28-4e79-a8a0-3ccb4013aaec/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:32:34,990 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 04:32:34,991 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:32:34,991 INFO L85 PathProgramCache]: Analyzing trace with hash -1983900035, now seen corresponding path program 6 times [2024-11-28 04:32:34,991 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 04:32:34,991 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [584789496] [2024-11-28 04:32:34,991 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-28 04:32:34,991 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 04:32:35,877 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 42 check-sat command(s) [2024-11-28 04:32:35,877 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 04:32:38,760 INFO L134 CoverageAnalysis]: Checked inductivity of 3362 backedges. 0 proven. 1681 refuted. 0 times theorem prover too weak. 1681 trivial. 0 not checked. [2024-11-28 04:32:38,761 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 04:32:38,761 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [584789496] [2024-11-28 04:32:38,761 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [584789496] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 04:32:38,761 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1975760911] [2024-11-28 04:32:38,761 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-28 04:32:38,762 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:32:38,762 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5409893d-2b28-4e79-a8a0-3ccb4013aaec/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:32:38,764 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5409893d-2b28-4e79-a8a0-3ccb4013aaec/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 04:32:38,772 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5409893d-2b28-4e79-a8a0-3ccb4013aaec/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process