./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/loop-acceleration/simple_4-1.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_643d409a-8c4d-4b64-9267-ab45a1417003/bin/uautomizer-verify-aQ6SnzHsRB/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_643d409a-8c4d-4b64-9267-ab45a1417003/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_643d409a-8c4d-4b64-9267-ab45a1417003/bin/uautomizer-verify-aQ6SnzHsRB/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_643d409a-8c4d-4b64-9267-ab45a1417003/bin/uautomizer-verify-aQ6SnzHsRB/config/AutomizerReach.xml -i ../../sv-benchmarks/c/loop-acceleration/simple_4-1.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_643d409a-8c4d-4b64-9267-ab45a1417003/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_643d409a-8c4d-4b64-9267-ab45a1417003/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 9950a3ef699b75b517ce9b65b2c32dbbe13ac0a027bb7e02ceeaeee924f6aade --- Real Ultimate output --- This is Ultimate 0.3.0-dev-d790fec [2024-11-27 19:55:42,300 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-27 19:55:42,389 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_643d409a-8c4d-4b64-9267-ab45a1417003/bin/uautomizer-verify-aQ6SnzHsRB/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-11-27 19:55:42,394 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-27 19:55:42,398 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-27 19:55:42,429 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-27 19:55:42,430 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-27 19:55:42,430 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-27 19:55:42,431 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-27 19:55:42,431 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-27 19:55:42,432 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-27 19:55:42,432 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-27 19:55:42,433 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-27 19:55:42,433 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-27 19:55:42,433 INFO L153 SettingsManager]: * Use SBE=true [2024-11-27 19:55:42,433 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-27 19:55:42,433 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-27 19:55:42,433 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-27 19:55:42,433 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-27 19:55:42,433 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-27 19:55:42,433 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-27 19:55:42,433 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-27 19:55:42,433 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-27 19:55:42,434 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-27 19:55:42,434 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-27 19:55:42,434 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-27 19:55:42,434 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2024-11-27 19:55:42,434 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-27 19:55:42,434 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2024-11-27 19:55:42,434 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-27 19:55:42,434 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-27 19:55:42,434 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-27 19:55:42,434 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-27 19:55:42,434 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-27 19:55:42,434 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-27 19:55:42,434 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-27 19:55:42,434 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-27 19:55:42,435 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-27 19:55:42,435 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-27 19:55:42,435 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-27 19:55:42,435 INFO L153 SettingsManager]: * Compute procedure contracts=false [2024-11-27 19:55:42,435 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-27 19:55:42,435 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-27 19:55:42,435 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-27 19:55:42,435 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-27 19:55:42,435 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-27 19:55:42,435 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-27 19:55:42,435 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-27 19:55:42,435 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_643d409a-8c4d-4b64-9267-ab45a1417003/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 -> 9950a3ef699b75b517ce9b65b2c32dbbe13ac0a027bb7e02ceeaeee924f6aade [2024-11-27 19:55:42,760 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-27 19:55:42,771 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-27 19:55:42,773 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-27 19:55:42,776 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-27 19:55:42,776 INFO L274 PluginConnector]: CDTParser initialized [2024-11-27 19:55:42,777 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_643d409a-8c4d-4b64-9267-ab45a1417003/bin/uautomizer-verify-aQ6SnzHsRB/../../sv-benchmarks/c/loop-acceleration/simple_4-1.c [2024-11-27 19:55:45,776 INFO L533 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_643d409a-8c4d-4b64-9267-ab45a1417003/bin/uautomizer-verify-aQ6SnzHsRB/data/c320ff7f2/0dd72c65bfd24fbb8288a2620410f25f/FLAGaec174b09 [2024-11-27 19:55:45,996 INFO L384 CDTParser]: Found 1 translation units. [2024-11-27 19:55:45,997 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_643d409a-8c4d-4b64-9267-ab45a1417003/sv-benchmarks/c/loop-acceleration/simple_4-1.c [2024-11-27 19:55:46,004 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_643d409a-8c4d-4b64-9267-ab45a1417003/bin/uautomizer-verify-aQ6SnzHsRB/data/c320ff7f2/0dd72c65bfd24fbb8288a2620410f25f/FLAGaec174b09 [2024-11-27 19:55:46,019 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_643d409a-8c4d-4b64-9267-ab45a1417003/bin/uautomizer-verify-aQ6SnzHsRB/data/c320ff7f2/0dd72c65bfd24fbb8288a2620410f25f [2024-11-27 19:55:46,021 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-27 19:55:46,022 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-27 19:55:46,024 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-27 19:55:46,024 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-27 19:55:46,028 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-27 19:55:46,029 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.11 07:55:46" (1/1) ... [2024-11-27 19:55:46,030 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@22ff160b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 07:55:46, skipping insertion in model container [2024-11-27 19:55:46,030 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.11 07:55:46" (1/1) ... [2024-11-27 19:55:46,044 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-27 19:55:46,177 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_643d409a-8c4d-4b64-9267-ab45a1417003/sv-benchmarks/c/loop-acceleration/simple_4-1.c[322,335] [2024-11-27 19:55:46,189 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-27 19:55:46,200 INFO L200 MainTranslator]: Completed pre-run [2024-11-27 19:55:46,213 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_643d409a-8c4d-4b64-9267-ab45a1417003/sv-benchmarks/c/loop-acceleration/simple_4-1.c[322,335] [2024-11-27 19:55:46,216 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-27 19:55:46,233 INFO L204 MainTranslator]: Completed translation [2024-11-27 19:55:46,234 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 07:55:46 WrapperNode [2024-11-27 19:55:46,234 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-27 19:55:46,235 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-27 19:55:46,236 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-27 19:55:46,236 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-27 19:55:46,243 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 07:55:46" (1/1) ... [2024-11-27 19:55:46,249 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 07:55:46" (1/1) ... [2024-11-27 19:55:46,269 INFO L138 Inliner]: procedures = 12, calls = 8, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 21 [2024-11-27 19:55:46,269 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-27 19:55:46,270 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-27 19:55:46,271 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-27 19:55:46,271 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-27 19:55:46,280 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 07:55:46" (1/1) ... [2024-11-27 19:55:46,280 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 07:55:46" (1/1) ... [2024-11-27 19:55:46,282 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 07:55:46" (1/1) ... [2024-11-27 19:55:46,292 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2024-11-27 19:55:46,293 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 07:55:46" (1/1) ... [2024-11-27 19:55:46,293 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 07:55:46" (1/1) ... [2024-11-27 19:55:46,300 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 07:55:46" (1/1) ... [2024-11-27 19:55:46,300 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 07:55:46" (1/1) ... [2024-11-27 19:55:46,305 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 07:55:46" (1/1) ... [2024-11-27 19:55:46,306 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 07:55:46" (1/1) ... [2024-11-27 19:55:46,307 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 07:55:46" (1/1) ... [2024-11-27 19:55:46,311 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-27 19:55:46,312 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-27 19:55:46,312 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-27 19:55:46,312 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-27 19:55:46,313 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 07:55:46" (1/1) ... [2024-11-27 19:55:46,323 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-27 19:55:46,335 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_643d409a-8c4d-4b64-9267-ab45a1417003/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 19:55:46,352 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_643d409a-8c4d-4b64-9267-ab45a1417003/bin/uautomizer-verify-aQ6SnzHsRB/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-11-27 19:55:46,356 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_643d409a-8c4d-4b64-9267-ab45a1417003/bin/uautomizer-verify-aQ6SnzHsRB/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-11-27 19:55:46,386 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-27 19:55:46,386 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-27 19:55:46,386 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-27 19:55:46,386 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-27 19:55:46,446 INFO L234 CfgBuilder]: Building ICFG [2024-11-27 19:55:46,448 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-27 19:55:46,557 INFO L? ?]: Removed 6 outVars from TransFormulas that were not future-live. [2024-11-27 19:55:46,557 INFO L283 CfgBuilder]: Performing block encoding [2024-11-27 19:55:46,570 INFO L307 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-27 19:55:46,570 INFO L312 CfgBuilder]: Removed 1 assume(true) statements. [2024-11-27 19:55:46,570 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.11 07:55:46 BoogieIcfgContainer [2024-11-27 19:55:46,570 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-27 19:55:46,575 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-27 19:55:46,575 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-27 19:55:46,580 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-27 19:55:46,580 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.11 07:55:46" (1/3) ... [2024-11-27 19:55:46,581 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@238d5589 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.11 07:55:46, skipping insertion in model container [2024-11-27 19:55:46,581 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 07:55:46" (2/3) ... [2024-11-27 19:55:46,581 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@238d5589 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.11 07:55:46, skipping insertion in model container [2024-11-27 19:55:46,581 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.11 07:55:46" (3/3) ... [2024-11-27 19:55:46,582 INFO L128 eAbstractionObserver]: Analyzing ICFG simple_4-1.c [2024-11-27 19:55:46,599 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-27 19:55:46,602 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG simple_4-1.c that has 1 procedures, 12 locations, 1 initial locations, 1 loop locations, and 1 error locations. [2024-11-27 19:55:46,669 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-27 19:55:46,683 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;@3a7e8d19, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-27 19:55:46,684 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-11-27 19:55:46,688 INFO L276 IsEmpty]: Start isEmpty. Operand has 12 states, 10 states have (on average 1.4) internal successors, (14), 11 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 19:55:46,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2024-11-27 19:55:46,693 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 19:55:46,694 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2024-11-27 19:55:46,694 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-27 19:55:46,699 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 19:55:46,699 INFO L85 PathProgramCache]: Analyzing trace with hash 889664619, now seen corresponding path program 1 times [2024-11-27 19:55:46,706 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 19:55:46,707 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [751018367] [2024-11-27 19:55:46,707 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 19:55:46,708 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 19:55:46,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 19:55:47,043 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 19:55:47,044 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 19:55:47,046 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [751018367] [2024-11-27 19:55:47,047 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [751018367] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-27 19:55:47,047 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-27 19:55:47,047 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-27 19:55:47,050 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [725875552] [2024-11-27 19:55:47,051 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-27 19:55:47,055 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-27 19:55:47,055 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 19:55:47,076 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-27 19:55:47,077 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-27 19:55:47,080 INFO L87 Difference]: Start difference. First operand has 12 states, 10 states have (on average 1.4) internal successors, (14), 11 states have internal predecessors, (14), 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 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 19:55:47,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 19:55:47,121 INFO L93 Difference]: Finished difference Result 22 states and 26 transitions. [2024-11-27 19:55:47,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-27 19:55:47,126 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 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 6 [2024-11-27 19:55:47,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 19:55:47,133 INFO L225 Difference]: With dead ends: 22 [2024-11-27 19:55:47,133 INFO L226 Difference]: Without dead ends: 10 [2024-11-27 19:55:47,136 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-27 19:55:47,138 INFO L435 NwaCegarLoop]: 10 mSDtfsCounter, 1 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-27 19:55:47,142 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 16 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-27 19:55:47,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2024-11-27 19:55:47,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 9. [2024-11-27 19:55:47,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9 states, 8 states have (on average 1.125) internal successors, (9), 8 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 19:55:47,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 9 transitions. [2024-11-27 19:55:47,177 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 9 transitions. Word has length 6 [2024-11-27 19:55:47,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-27 19:55:47,178 INFO L471 AbstractCegarLoop]: Abstraction has 9 states and 9 transitions. [2024-11-27 19:55:47,178 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 19:55:47,178 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 9 transitions. [2024-11-27 19:55:47,178 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2024-11-27 19:55:47,178 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 19:55:47,179 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 19:55:47,179 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-27 19:55:47,179 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-27 19:55:47,179 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 19:55:47,180 INFO L85 PathProgramCache]: Analyzing trace with hash 207982255, now seen corresponding path program 1 times [2024-11-27 19:55:47,180 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 19:55:47,180 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1089269401] [2024-11-27 19:55:47,180 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 19:55:47,180 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 19:55:47,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 19:55:47,339 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-27 19:55:47,344 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 19:55:47,344 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1089269401] [2024-11-27 19:55:47,344 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1089269401] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-27 19:55:47,344 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2066016248] [2024-11-27 19:55:47,344 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 19:55:47,345 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 19:55:47,345 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_643d409a-8c4d-4b64-9267-ab45a1417003/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 19:55:47,349 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_643d409a-8c4d-4b64-9267-ab45a1417003/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 19:55:47,351 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_643d409a-8c4d-4b64-9267-ab45a1417003/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-27 19:55:47,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 19:55:47,397 INFO L256 TraceCheckSpWp]: Trace formula consists of 34 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-11-27 19:55:47,401 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 19:55:47,433 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-27 19:55:47,433 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-27 19:55:47,492 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-27 19:55:47,492 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2066016248] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-27 19:55:47,492 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-27 19:55:47,493 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2024-11-27 19:55:47,493 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [525830715] [2024-11-27 19:55:47,493 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-27 19:55:47,494 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-27 19:55:47,494 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 19:55:47,495 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-27 19:55:47,495 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2024-11-27 19:55:47,495 INFO L87 Difference]: Start difference. First operand 9 states and 9 transitions. Second operand has 7 states, 7 states have (on average 2.0) internal successors, (14), 7 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 19:55:47,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 19:55:47,597 INFO L93 Difference]: Finished difference Result 19 states and 21 transitions. [2024-11-27 19:55:47,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-27 19:55:47,597 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.0) internal successors, (14), 7 states have internal predecessors, (14), 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 8 [2024-11-27 19:55:47,598 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 19:55:47,598 INFO L225 Difference]: With dead ends: 19 [2024-11-27 19:55:47,599 INFO L226 Difference]: Without dead ends: 15 [2024-11-27 19:55:47,599 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=26, Invalid=30, Unknown=0, NotChecked=0, Total=56 [2024-11-27 19:55:47,600 INFO L435 NwaCegarLoop]: 5 mSDtfsCounter, 4 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-27 19:55:47,601 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 17 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-27 19:55:47,602 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2024-11-27 19:55:47,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2024-11-27 19:55:47,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 14 states have (on average 1.0714285714285714) internal successors, (15), 14 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 19:55:47,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 15 transitions. [2024-11-27 19:55:47,609 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 15 transitions. Word has length 8 [2024-11-27 19:55:47,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-27 19:55:47,610 INFO L471 AbstractCegarLoop]: Abstraction has 15 states and 15 transitions. [2024-11-27 19:55:47,610 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.0) internal successors, (14), 7 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 19:55:47,610 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 15 transitions. [2024-11-27 19:55:47,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2024-11-27 19:55:47,610 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 19:55:47,610 INFO L218 NwaCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1] [2024-11-27 19:55:47,621 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_643d409a-8c4d-4b64-9267-ab45a1417003/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-27 19:55:47,816 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_643d409a-8c4d-4b64-9267-ab45a1417003/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 19:55:47,816 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-27 19:55:47,817 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 19:55:47,817 INFO L85 PathProgramCache]: Analyzing trace with hash -858744965, now seen corresponding path program 2 times [2024-11-27 19:55:47,817 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 19:55:47,817 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [771871343] [2024-11-27 19:55:47,817 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-27 19:55:47,818 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 19:55:47,837 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-27 19:55:47,837 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 19:55:48,019 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-27 19:55:48,019 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 19:55:48,019 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [771871343] [2024-11-27 19:55:48,019 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [771871343] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-27 19:55:48,019 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [577055484] [2024-11-27 19:55:48,021 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-27 19:55:48,021 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 19:55:48,022 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_643d409a-8c4d-4b64-9267-ab45a1417003/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 19:55:48,024 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_643d409a-8c4d-4b64-9267-ab45a1417003/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 19:55:48,029 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_643d409a-8c4d-4b64-9267-ab45a1417003/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-27 19:55:48,080 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-27 19:55:48,080 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 19:55:48,084 INFO L256 TraceCheckSpWp]: Trace formula consists of 43 conjuncts, 11 conjuncts are in the unsatisfiable core [2024-11-27 19:55:48,085 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 19:55:48,143 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-27 19:55:48,143 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-27 19:55:48,349 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-27 19:55:48,349 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [577055484] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-27 19:55:48,350 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-27 19:55:48,350 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2024-11-27 19:55:48,350 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [812226311] [2024-11-27 19:55:48,350 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-27 19:55:48,351 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-11-27 19:55:48,351 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 19:55:48,353 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-11-27 19:55:48,354 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=98, Unknown=0, NotChecked=0, Total=156 [2024-11-27 19:55:48,355 INFO L87 Difference]: Start difference. First operand 15 states and 15 transitions. Second operand has 13 states, 13 states have (on average 2.0) internal successors, (26), 13 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) [2024-11-27 19:55:48,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 19:55:48,721 INFO L93 Difference]: Finished difference Result 31 states and 36 transitions. [2024-11-27 19:55:48,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-11-27 19:55:48,723 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.0) internal successors, (26), 13 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) Word has length 14 [2024-11-27 19:55:48,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 19:55:48,723 INFO L225 Difference]: With dead ends: 31 [2024-11-27 19:55:48,723 INFO L226 Difference]: Without dead ends: 27 [2024-11-27 19:55:48,724 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=123, Invalid=183, Unknown=0, NotChecked=0, Total=306 [2024-11-27 19:55:48,725 INFO L435 NwaCegarLoop]: 5 mSDtfsCounter, 7 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 71 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 20 SdHoareTripleChecker+Invalid, 77 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 71 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-27 19:55:48,725 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 20 Invalid, 77 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 71 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-27 19:55:48,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2024-11-27 19:55:48,738 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2024-11-27 19:55:48,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 26 states have (on average 1.0384615384615385) internal successors, (27), 26 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 19:55:48,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 27 transitions. [2024-11-27 19:55:48,739 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 27 transitions. Word has length 14 [2024-11-27 19:55:48,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-27 19:55:48,739 INFO L471 AbstractCegarLoop]: Abstraction has 27 states and 27 transitions. [2024-11-27 19:55:48,739 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.0) internal successors, (26), 13 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) [2024-11-27 19:55:48,739 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 27 transitions. [2024-11-27 19:55:48,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2024-11-27 19:55:48,740 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 19:55:48,740 INFO L218 NwaCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1] [2024-11-27 19:55:48,750 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_643d409a-8c4d-4b64-9267-ab45a1417003/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-11-27 19:55:48,940 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_643d409a-8c4d-4b64-9267-ab45a1417003/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 19:55:48,941 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-27 19:55:48,941 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 19:55:48,941 INFO L85 PathProgramCache]: Analyzing trace with hash 1255476755, now seen corresponding path program 3 times [2024-11-27 19:55:48,941 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 19:55:48,942 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1528615517] [2024-11-27 19:55:48,942 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-27 19:55:48,942 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 19:55:48,971 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2024-11-27 19:55:48,971 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 19:55:49,427 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-27 19:55:49,427 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 19:55:49,427 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1528615517] [2024-11-27 19:55:49,427 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1528615517] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-27 19:55:49,428 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1189888830] [2024-11-27 19:55:49,428 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-27 19:55:49,428 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 19:55:49,428 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_643d409a-8c4d-4b64-9267-ab45a1417003/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 19:55:49,432 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_643d409a-8c4d-4b64-9267-ab45a1417003/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 19:55:49,434 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_643d409a-8c4d-4b64-9267-ab45a1417003/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-27 19:55:49,492 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2024-11-27 19:55:49,492 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 19:55:49,497 INFO L256 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 23 conjuncts are in the unsatisfiable core [2024-11-27 19:55:49,499 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 19:55:49,569 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-27 19:55:49,569 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-27 19:55:50,014 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-27 19:55:50,015 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1189888830] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-27 19:55:50,015 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-27 19:55:50,015 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 25 [2024-11-27 19:55:50,015 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2075263663] [2024-11-27 19:55:50,016 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-27 19:55:50,016 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2024-11-27 19:55:50,016 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 19:55:50,017 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2024-11-27 19:55:50,018 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=410, Unknown=0, NotChecked=0, Total=600 [2024-11-27 19:55:50,019 INFO L87 Difference]: Start difference. First operand 27 states and 27 transitions. Second operand has 25 states, 25 states have (on average 2.0) internal successors, (50), 25 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 19:55:51,762 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 19:55:51,763 INFO L93 Difference]: Finished difference Result 55 states and 66 transitions. [2024-11-27 19:55:51,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2024-11-27 19:55:51,764 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.0) internal successors, (50), 25 states have internal predecessors, (50), 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 26 [2024-11-27 19:55:51,764 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 19:55:51,764 INFO L225 Difference]: With dead ends: 55 [2024-11-27 19:55:51,764 INFO L226 Difference]: Without dead ends: 51 [2024-11-27 19:55:51,765 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=465, Invalid=795, Unknown=0, NotChecked=0, Total=1260 [2024-11-27 19:55:51,766 INFO L435 NwaCegarLoop]: 5 mSDtfsCounter, 12 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 290 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 302 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 290 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-27 19:55:51,766 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 41 Invalid, 302 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 290 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-27 19:55:51,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2024-11-27 19:55:51,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2024-11-27 19:55:51,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 50 states have (on average 1.02) internal successors, (51), 50 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 19:55:51,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 51 transitions. [2024-11-27 19:55:51,787 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 51 transitions. Word has length 26 [2024-11-27 19:55:51,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-27 19:55:51,787 INFO L471 AbstractCegarLoop]: Abstraction has 51 states and 51 transitions. [2024-11-27 19:55:51,788 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.0) internal successors, (50), 25 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 19:55:51,788 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 51 transitions. [2024-11-27 19:55:51,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2024-11-27 19:55:51,791 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 19:55:51,791 INFO L218 NwaCegarLoop]: trace histogram [22, 22, 1, 1, 1, 1, 1, 1] [2024-11-27 19:55:51,801 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_643d409a-8c4d-4b64-9267-ab45a1417003/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-11-27 19:55:51,995 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_643d409a-8c4d-4b64-9267-ab45a1417003/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2024-11-27 19:55:51,996 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-27 19:55:51,996 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 19:55:51,996 INFO L85 PathProgramCache]: Analyzing trace with hash 1473548099, now seen corresponding path program 4 times [2024-11-27 19:55:51,996 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 19:55:51,996 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1341628984] [2024-11-27 19:55:51,996 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-27 19:55:51,996 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 19:55:52,032 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-27 19:55:52,032 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 19:55:52,765 INFO L134 CoverageAnalysis]: Checked inductivity of 484 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-27 19:55:52,765 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 19:55:52,766 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1341628984] [2024-11-27 19:55:52,766 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1341628984] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-27 19:55:52,766 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [113374944] [2024-11-27 19:55:52,766 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-27 19:55:52,766 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 19:55:52,766 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_643d409a-8c4d-4b64-9267-ab45a1417003/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 19:55:52,771 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_643d409a-8c4d-4b64-9267-ab45a1417003/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 19:55:52,778 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_643d409a-8c4d-4b64-9267-ab45a1417003/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-27 19:55:52,831 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-27 19:55:52,831 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 19:55:52,833 INFO L256 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 47 conjuncts are in the unsatisfiable core [2024-11-27 19:55:52,836 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 19:55:52,968 INFO L134 CoverageAnalysis]: Checked inductivity of 484 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-27 19:55:52,968 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-27 19:55:54,302 INFO L134 CoverageAnalysis]: Checked inductivity of 484 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-27 19:55:54,306 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [113374944] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-27 19:55:54,306 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-27 19:55:54,307 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25] total 49 [2024-11-27 19:55:54,307 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [930332331] [2024-11-27 19:55:54,307 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-27 19:55:54,307 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2024-11-27 19:55:54,307 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 19:55:54,308 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2024-11-27 19:55:54,309 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=670, Invalid=1682, Unknown=0, NotChecked=0, Total=2352 [2024-11-27 19:55:54,310 INFO L87 Difference]: Start difference. First operand 51 states and 51 transitions. Second operand has 49 states, 49 states have (on average 2.0) internal successors, (98), 49 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 19:56:06,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 19:56:06,935 INFO L93 Difference]: Finished difference Result 103 states and 126 transitions. [2024-11-27 19:56:06,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2024-11-27 19:56:06,936 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 2.0) internal successors, (98), 49 states have internal predecessors, (98), 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 50 [2024-11-27 19:56:06,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 19:56:06,937 INFO L225 Difference]: With dead ends: 103 [2024-11-27 19:56:06,938 INFO L226 Difference]: Without dead ends: 99 [2024-11-27 19:56:06,940 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 346 ImplicationChecksByTransitivity, 13.0s TimeCoverageRelationStatistics Valid=1797, Invalid=3315, Unknown=0, NotChecked=0, Total=5112 [2024-11-27 19:56:06,941 INFO L435 NwaCegarLoop]: 5 mSDtfsCounter, 24 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 1161 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 77 SdHoareTripleChecker+Invalid, 1185 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 1161 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2024-11-27 19:56:06,941 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 77 Invalid, 1185 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 1161 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2024-11-27 19:56:06,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2024-11-27 19:56:06,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 99. [2024-11-27 19:56:06,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 98 states have (on average 1.010204081632653) internal successors, (99), 98 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 19:56:06,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 99 transitions. [2024-11-27 19:56:06,965 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 99 transitions. Word has length 50 [2024-11-27 19:56:06,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-27 19:56:06,965 INFO L471 AbstractCegarLoop]: Abstraction has 99 states and 99 transitions. [2024-11-27 19:56:06,965 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 2.0) internal successors, (98), 49 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 19:56:06,966 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 99 transitions. [2024-11-27 19:56:06,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2024-11-27 19:56:06,969 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 19:56:06,970 INFO L218 NwaCegarLoop]: trace histogram [46, 46, 1, 1, 1, 1, 1, 1] [2024-11-27 19:56:06,975 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_643d409a-8c4d-4b64-9267-ab45a1417003/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-11-27 19:56:07,170 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_643d409a-8c4d-4b64-9267-ab45a1417003/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 19:56:07,170 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-27 19:56:07,171 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 19:56:07,171 INFO L85 PathProgramCache]: Analyzing trace with hash -350887517, now seen corresponding path program 5 times [2024-11-27 19:56:07,171 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 19:56:07,171 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1561665183] [2024-11-27 19:56:07,171 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-27 19:56:07,171 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 19:56:07,439 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 47 check-sat command(s) [2024-11-27 19:56:07,441 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 19:56:09,512 INFO L134 CoverageAnalysis]: Checked inductivity of 2116 backedges. 0 proven. 2116 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-27 19:56:09,512 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 19:56:09,512 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1561665183] [2024-11-27 19:56:09,512 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1561665183] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-27 19:56:09,513 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1007487910] [2024-11-27 19:56:09,513 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-27 19:56:09,513 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 19:56:09,513 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_643d409a-8c4d-4b64-9267-ab45a1417003/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 19:56:09,515 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_643d409a-8c4d-4b64-9267-ab45a1417003/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 19:56:09,516 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_643d409a-8c4d-4b64-9267-ab45a1417003/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-27 19:56:10,875 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 47 check-sat command(s) [2024-11-27 19:56:10,875 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 19:56:10,878 WARN L254 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 95 conjuncts are in the unsatisfiable core [2024-11-27 19:56:10,885 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 19:56:11,111 INFO L134 CoverageAnalysis]: Checked inductivity of 2116 backedges. 0 proven. 2116 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-27 19:56:11,111 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-27 19:56:15,085 INFO L134 CoverageAnalysis]: Checked inductivity of 2116 backedges. 0 proven. 2116 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-27 19:56:15,086 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1007487910] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-27 19:56:15,086 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-27 19:56:15,086 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 49, 49] total 97 [2024-11-27 19:56:15,086 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1276523486] [2024-11-27 19:56:15,086 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-27 19:56:15,087 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 97 states [2024-11-27 19:56:15,087 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 19:56:15,089 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 97 interpolants. [2024-11-27 19:56:15,093 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=2494, Invalid=6818, Unknown=0, NotChecked=0, Total=9312 [2024-11-27 19:56:15,094 INFO L87 Difference]: Start difference. First operand 99 states and 99 transitions. Second operand has 97 states, 97 states have (on average 2.0) internal successors, (194), 97 states have internal predecessors, (194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 19:56:31,530 WARN L286 SmtUtils]: Spent 13.18s on a formula simplification. DAG size of input: 190 DAG size of output: 190 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-11-27 19:56:48,311 WARN L286 SmtUtils]: Spent 16.08s on a formula simplification. DAG size of input: 186 DAG size of output: 186 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-11-27 19:57:02,309 WARN L286 SmtUtils]: Spent 12.46s on a formula simplification. DAG size of input: 182 DAG size of output: 182 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-11-27 19:57:16,332 WARN L286 SmtUtils]: Spent 12.10s on a formula simplification. DAG size of input: 178 DAG size of output: 178 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-11-27 19:57:28,589 WARN L286 SmtUtils]: Spent 10.32s on a formula simplification. DAG size of input: 174 DAG size of output: 174 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-11-27 19:57:38,246 WARN L286 SmtUtils]: Spent 8.64s on a formula simplification. DAG size of input: 170 DAG size of output: 170 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-11-27 19:57:47,781 WARN L286 SmtUtils]: Spent 7.87s on a formula simplification. DAG size of input: 166 DAG size of output: 166 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-11-27 19:57:57,391 WARN L286 SmtUtils]: Spent 8.64s on a formula simplification. DAG size of input: 162 DAG size of output: 162 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-11-27 19:58:07,848 WARN L286 SmtUtils]: Spent 8.34s on a formula simplification. DAG size of input: 158 DAG size of output: 158 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-11-27 19:58:14,694 WARN L286 SmtUtils]: Spent 5.84s on a formula simplification. DAG size of input: 154 DAG size of output: 154 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-11-27 19:58:27,118 WARN L286 SmtUtils]: Spent 5.32s on a formula simplification. DAG size of input: 146 DAG size of output: 146 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-11-27 19:59:37,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 19:59:37,306 INFO L93 Difference]: Finished difference Result 199 states and 246 transitions. [2024-11-27 19:59:37,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2024-11-27 19:59:37,308 INFO L78 Accepts]: Start accepts. Automaton has has 97 states, 97 states have (on average 2.0) internal successors, (194), 97 states have internal predecessors, (194), 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 98 [2024-11-27 19:59:37,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 19:59:37,309 INFO L225 Difference]: With dead ends: 199 [2024-11-27 19:59:37,309 INFO L226 Difference]: Without dead ends: 195 [2024-11-27 19:59:37,314 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 291 GetRequests, 149 SyntacticMatches, 0 SemanticMatches, 142 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1270 ImplicationChecksByTransitivity, 202.6s TimeCoverageRelationStatistics Valid=7053, Invalid=13539, Unknown=0, NotChecked=0, Total=20592 [2024-11-27 19:59:37,315 INFO L435 NwaCegarLoop]: 5 mSDtfsCounter, 48 mSDsluCounter, 141 mSDsCounter, 0 mSdLazyCounter, 4619 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 146 SdHoareTripleChecker+Invalid, 4667 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 4619 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.2s IncrementalHoareTripleChecker+Time [2024-11-27 19:59:37,315 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [48 Valid, 146 Invalid, 4667 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 4619 Invalid, 0 Unknown, 0 Unchecked, 4.2s Time] [2024-11-27 19:59:37,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2024-11-27 19:59:37,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 195. [2024-11-27 19:59:37,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 195 states, 194 states have (on average 1.0051546391752577) internal successors, (195), 194 states have internal predecessors, (195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 19:59:37,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 195 transitions. [2024-11-27 19:59:37,361 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 195 transitions. Word has length 98 [2024-11-27 19:59:37,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-27 19:59:37,362 INFO L471 AbstractCegarLoop]: Abstraction has 195 states and 195 transitions. [2024-11-27 19:59:37,362 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 97 states, 97 states have (on average 2.0) internal successors, (194), 97 states have internal predecessors, (194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 19:59:37,362 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 195 transitions. [2024-11-27 19:59:37,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 195 [2024-11-27 19:59:37,365 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 19:59:37,365 INFO L218 NwaCegarLoop]: trace histogram [94, 94, 1, 1, 1, 1, 1, 1] [2024-11-27 19:59:37,375 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_643d409a-8c4d-4b64-9267-ab45a1417003/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2024-11-27 19:59:37,569 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_643d409a-8c4d-4b64-9267-ab45a1417003/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2024-11-27 19:59:37,569 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-27 19:59:37,570 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 19:59:37,570 INFO L85 PathProgramCache]: Analyzing trace with hash -639515037, now seen corresponding path program 6 times [2024-11-27 19:59:37,570 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 19:59:37,570 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [824465789] [2024-11-27 19:59:37,570 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-27 19:59:37,570 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 19:59:37,896 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 95 check-sat command(s) [2024-11-27 19:59:37,896 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 19:59:44,670 INFO L134 CoverageAnalysis]: Checked inductivity of 8836 backedges. 0 proven. 8836 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-27 19:59:44,670 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 19:59:44,670 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [824465789] [2024-11-27 19:59:44,670 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [824465789] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-27 19:59:44,670 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1381534342] [2024-11-27 19:59:44,670 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-27 19:59:44,670 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 19:59:44,671 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_643d409a-8c4d-4b64-9267-ab45a1417003/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 19:59:44,677 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_643d409a-8c4d-4b64-9267-ab45a1417003/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 19:59:44,678 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_643d409a-8c4d-4b64-9267-ab45a1417003/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-27 19:59:48,380 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 95 check-sat command(s) [2024-11-27 19:59:48,380 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 19:59:48,383 WARN L254 TraceCheckSpWp]: Trace formula consists of 313 conjuncts, 197 conjuncts are in the unsatisfiable core [2024-11-27 19:59:48,391 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 19:59:48,809 INFO L134 CoverageAnalysis]: Checked inductivity of 8836 backedges. 0 proven. 8836 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-27 19:59:48,810 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-27 20:00:07,892 INFO L134 CoverageAnalysis]: Checked inductivity of 8836 backedges. 0 proven. 8836 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-27 20:00:07,892 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1381534342] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-27 20:00:07,892 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-27 20:00:07,892 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [97, 97, 99] total 195 [2024-11-27 20:00:07,893 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [770570524] [2024-11-27 20:00:07,893 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-27 20:00:07,894 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 195 states [2024-11-27 20:00:07,894 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 20:00:07,898 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 195 interpolants. [2024-11-27 20:00:07,903 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=9697, Invalid=28133, Unknown=0, NotChecked=0, Total=37830 [2024-11-27 20:00:07,903 INFO L87 Difference]: Start difference. First operand 195 states and 195 transitions. Second operand has 195 states, 195 states have (on average 1.9897435897435898) internal successors, (388), 195 states have internal predecessors, (388), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 20:03:18,386 WARN L286 SmtUtils]: Spent 2.91m on a formula simplification that was a NOOP. DAG size: 481 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-11-27 20:03:19,849 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.46s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-11-27 20:06:43,427 WARN L286 SmtUtils]: Spent 3.24m on a formula simplification that was a NOOP. DAG size: 476 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-11-27 20:10:17,087 WARN L286 SmtUtils]: Spent 3.38m on a formula simplification that was a NOOP. DAG size: 471 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate)