./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/recursive-simple/sum_15x0-2.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_be41c75b-8843-4b24-9742-0d657c72db73/bin/uautomizer-verify-aQ6SnzHsRB/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be41c75b-8843-4b24-9742-0d657c72db73/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_be41c75b-8843-4b24-9742-0d657c72db73/bin/uautomizer-verify-aQ6SnzHsRB/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be41c75b-8843-4b24-9742-0d657c72db73/bin/uautomizer-verify-aQ6SnzHsRB/config/AutomizerReach.xml -i ../../sv-benchmarks/c/recursive-simple/sum_15x0-2.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be41c75b-8843-4b24-9742-0d657c72db73/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_be41c75b-8843-4b24-9742-0d657c72db73/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 610248c6c4c4e7168ba971ed5fa38cec025658aa482465da336c99be91c3aa5c --- Real Ultimate output --- This is Ultimate 0.3.0-dev-d790fec [2024-11-28 03:15:39,115 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-28 03:15:39,173 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be41c75b-8843-4b24-9742-0d657c72db73/bin/uautomizer-verify-aQ6SnzHsRB/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-11-28 03:15:39,179 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-28 03:15:39,179 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-28 03:15:39,211 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-28 03:15:39,212 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-28 03:15:39,213 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-28 03:15:39,213 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-28 03:15:39,213 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-28 03:15:39,214 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-28 03:15:39,214 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-28 03:15:39,214 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-28 03:15:39,214 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-28 03:15:39,215 INFO L153 SettingsManager]: * Use SBE=true [2024-11-28 03:15:39,215 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-28 03:15:39,215 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-28 03:15:39,215 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-28 03:15:39,215 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-28 03:15:39,215 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-28 03:15:39,215 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-28 03:15:39,216 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-28 03:15:39,216 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-28 03:15:39,216 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-28 03:15:39,216 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-28 03:15:39,216 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-28 03:15:39,216 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2024-11-28 03:15:39,216 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-28 03:15:39,217 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2024-11-28 03:15:39,217 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-28 03:15:39,218 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-28 03:15:39,218 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-28 03:15:39,218 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-28 03:15:39,218 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-28 03:15:39,218 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-28 03:15:39,218 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-28 03:15:39,218 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-28 03:15:39,218 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-28 03:15:39,218 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-28 03:15:39,218 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-28 03:15:39,219 INFO L153 SettingsManager]: * Compute procedure contracts=false [2024-11-28 03:15:39,219 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-28 03:15:39,219 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-28 03:15:39,219 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-28 03:15:39,219 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-28 03:15:39,219 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-28 03:15:39,219 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-28 03:15:39,219 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-28 03:15:39,219 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_be41c75b-8843-4b24-9742-0d657c72db73/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 -> 610248c6c4c4e7168ba971ed5fa38cec025658aa482465da336c99be91c3aa5c [2024-11-28 03:15:39,533 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-28 03:15:39,545 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-28 03:15:39,549 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-28 03:15:39,550 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-28 03:15:39,550 INFO L274 PluginConnector]: CDTParser initialized [2024-11-28 03:15:39,551 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be41c75b-8843-4b24-9742-0d657c72db73/bin/uautomizer-verify-aQ6SnzHsRB/../../sv-benchmarks/c/recursive-simple/sum_15x0-2.c [2024-11-28 03:15:42,598 INFO L533 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be41c75b-8843-4b24-9742-0d657c72db73/bin/uautomizer-verify-aQ6SnzHsRB/data/7a6419d67/6e5c25fa50d14f029e91cc7deb45bace/FLAG01aecf9d0 [2024-11-28 03:15:42,905 INFO L384 CDTParser]: Found 1 translation units. [2024-11-28 03:15:42,906 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be41c75b-8843-4b24-9742-0d657c72db73/sv-benchmarks/c/recursive-simple/sum_15x0-2.c [2024-11-28 03:15:42,925 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be41c75b-8843-4b24-9742-0d657c72db73/bin/uautomizer-verify-aQ6SnzHsRB/data/7a6419d67/6e5c25fa50d14f029e91cc7deb45bace/FLAG01aecf9d0 [2024-11-28 03:15:43,186 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be41c75b-8843-4b24-9742-0d657c72db73/bin/uautomizer-verify-aQ6SnzHsRB/data/7a6419d67/6e5c25fa50d14f029e91cc7deb45bace [2024-11-28 03:15:43,191 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-28 03:15:43,192 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-28 03:15:43,194 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-28 03:15:43,194 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-28 03:15:43,200 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-28 03:15:43,201 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 03:15:43" (1/1) ... [2024-11-28 03:15:43,204 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@55c7c010 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:15:43, skipping insertion in model container [2024-11-28 03:15:43,204 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 03:15:43" (1/1) ... [2024-11-28 03:15:43,220 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-28 03:15:43,378 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_be41c75b-8843-4b24-9742-0d657c72db73/sv-benchmarks/c/recursive-simple/sum_15x0-2.c[481,494] [2024-11-28 03:15:43,383 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-28 03:15:43,396 INFO L200 MainTranslator]: Completed pre-run [2024-11-28 03:15:43,411 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_be41c75b-8843-4b24-9742-0d657c72db73/sv-benchmarks/c/recursive-simple/sum_15x0-2.c[481,494] [2024-11-28 03:15:43,412 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-28 03:15:43,429 INFO L204 MainTranslator]: Completed translation [2024-11-28 03:15:43,429 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:15:43 WrapperNode [2024-11-28 03:15:43,432 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-28 03:15:43,433 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-28 03:15:43,433 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-28 03:15:43,433 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-28 03:15:43,440 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:15:43" (1/1) ... [2024-11-28 03:15:43,447 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:15:43" (1/1) ... [2024-11-28 03:15:43,463 INFO L138 Inliner]: procedures = 12, calls = 9, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 19 [2024-11-28 03:15:43,464 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-28 03:15:43,465 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-28 03:15:43,466 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-28 03:15:43,467 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-28 03:15:43,476 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:15:43" (1/1) ... [2024-11-28 03:15:43,476 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:15:43" (1/1) ... [2024-11-28 03:15:43,477 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:15:43" (1/1) ... [2024-11-28 03:15:43,490 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2024-11-28 03:15:43,491 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:15:43" (1/1) ... [2024-11-28 03:15:43,491 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:15:43" (1/1) ... [2024-11-28 03:15:43,493 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:15:43" (1/1) ... [2024-11-28 03:15:43,494 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:15:43" (1/1) ... [2024-11-28 03:15:43,495 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:15:43" (1/1) ... [2024-11-28 03:15:43,500 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:15:43" (1/1) ... [2024-11-28 03:15:43,501 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:15:43" (1/1) ... [2024-11-28 03:15:43,502 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-28 03:15:43,505 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-28 03:15:43,505 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-28 03:15:43,505 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-28 03:15:43,507 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:15:43" (1/1) ... [2024-11-28 03:15:43,513 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-28 03:15:43,527 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be41c75b-8843-4b24-9742-0d657c72db73/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:15:43,543 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be41c75b-8843-4b24-9742-0d657c72db73/bin/uautomizer-verify-aQ6SnzHsRB/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-11-28 03:15:43,546 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be41c75b-8843-4b24-9742-0d657c72db73/bin/uautomizer-verify-aQ6SnzHsRB/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-11-28 03:15:43,571 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-28 03:15:43,571 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-28 03:15:43,571 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-28 03:15:43,571 INFO L130 BoogieDeclarations]: Found specification of procedure sum [2024-11-28 03:15:43,571 INFO L138 BoogieDeclarations]: Found implementation of procedure sum [2024-11-28 03:15:43,571 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-28 03:15:43,633 INFO L234 CfgBuilder]: Building ICFG [2024-11-28 03:15:43,635 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-28 03:15:43,762 INFO L? ?]: Removed 10 outVars from TransFormulas that were not future-live. [2024-11-28 03:15:43,762 INFO L283 CfgBuilder]: Performing block encoding [2024-11-28 03:15:43,770 INFO L307 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-28 03:15:43,771 INFO L312 CfgBuilder]: Removed 0 assume(true) statements. [2024-11-28 03:15:43,771 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 03:15:43 BoogieIcfgContainer [2024-11-28 03:15:43,771 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-28 03:15:43,774 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-28 03:15:43,774 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-28 03:15:43,778 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-28 03:15:43,778 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.11 03:15:43" (1/3) ... [2024-11-28 03:15:43,779 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@276d6c6e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 03:15:43, skipping insertion in model container [2024-11-28 03:15:43,779 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:15:43" (2/3) ... [2024-11-28 03:15:43,779 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@276d6c6e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 03:15:43, skipping insertion in model container [2024-11-28 03:15:43,779 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 03:15:43" (3/3) ... [2024-11-28 03:15:43,781 INFO L128 eAbstractionObserver]: Analyzing ICFG sum_15x0-2.c [2024-11-28 03:15:43,800 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-28 03:15:43,805 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG sum_15x0-2.c that has 2 procedures, 16 locations, 1 initial locations, 0 loop locations, and 1 error locations. [2024-11-28 03:15:43,879 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-28 03:15:43,899 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;@2ed1ff2f, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-28 03:15:43,899 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-11-28 03:15:43,904 INFO L276 IsEmpty]: Start isEmpty. Operand has 16 states, 11 states have (on average 1.2727272727272727) internal successors, (14), 12 states have internal predecessors, (14), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-28 03:15:43,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2024-11-28 03:15:43,912 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 03:15:43,912 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:15:43,913 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 03:15:43,917 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:15:43,917 INFO L85 PathProgramCache]: Analyzing trace with hash -358017204, now seen corresponding path program 1 times [2024-11-28 03:15:43,925 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:15:43,926 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1395144288] [2024-11-28 03:15:43,926 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 03:15:43,927 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:15:44,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:15:44,147 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:15:44,147 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:15:44,148 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1395144288] [2024-11-28 03:15:44,148 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1395144288] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 03:15:44,151 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 03:15:44,152 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-28 03:15:44,153 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [519744752] [2024-11-28 03:15:44,154 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 03:15:44,157 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-28 03:15:44,157 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:15:44,176 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-28 03:15:44,177 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-28 03:15:44,178 INFO L87 Difference]: Start difference. First operand has 16 states, 11 states have (on average 1.2727272727272727) internal successors, (14), 12 states have internal predecessors, (14), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 5 states, 4 states have (on average 2.0) internal successors, (8), 5 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-11-28 03:15:44,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 03:15:44,276 INFO L93 Difference]: Finished difference Result 25 states and 28 transitions. [2024-11-28 03:15:44,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-28 03:15:44,279 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 5 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 10 [2024-11-28 03:15:44,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 03:15:44,287 INFO L225 Difference]: With dead ends: 25 [2024-11-28 03:15:44,287 INFO L226 Difference]: Without dead ends: 15 [2024-11-28 03:15:44,293 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-28 03:15:44,299 INFO L435 NwaCegarLoop]: 12 mSDtfsCounter, 4 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-28 03:15:44,299 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 35 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-28 03:15:44,315 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2024-11-28 03:15:44,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2024-11-28 03:15:44,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 10 states have (on average 1.1) internal successors, (11), 11 states have internal predecessors, (11), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2024-11-28 03:15:44,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 16 transitions. [2024-11-28 03:15:44,336 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 16 transitions. Word has length 10 [2024-11-28 03:15:44,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 03:15:44,336 INFO L471 AbstractCegarLoop]: Abstraction has 15 states and 16 transitions. [2024-11-28 03:15:44,336 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 5 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-11-28 03:15:44,337 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 16 transitions. [2024-11-28 03:15:44,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2024-11-28 03:15:44,338 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 03:15:44,338 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:15:44,338 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-28 03:15:44,339 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 03:15:44,339 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:15:44,339 INFO L85 PathProgramCache]: Analyzing trace with hash 679465686, now seen corresponding path program 1 times [2024-11-28 03:15:44,340 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:15:44,340 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [370182046] [2024-11-28 03:15:44,340 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 03:15:44,340 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:15:44,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:15:44,528 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-28 03:15:44,528 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:15:44,529 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [370182046] [2024-11-28 03:15:44,529 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [370182046] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 03:15:44,529 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1023151343] [2024-11-28 03:15:44,529 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 03:15:44,529 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:15:44,529 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be41c75b-8843-4b24-9742-0d657c72db73/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:15:44,533 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be41c75b-8843-4b24-9742-0d657c72db73/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:15:44,536 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be41c75b-8843-4b24-9742-0d657c72db73/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-28 03:15:44,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:15:44,600 INFO L256 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-28 03:15:44,605 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:15:44,726 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-28 03:15:44,728 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 03:15:45,065 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-28 03:15:45,066 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1023151343] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 03:15:45,066 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 03:15:45,066 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 7] total 9 [2024-11-28 03:15:45,066 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1216840350] [2024-11-28 03:15:45,067 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 03:15:45,067 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-11-28 03:15:45,067 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:15:45,068 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-11-28 03:15:45,068 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-11-28 03:15:45,069 INFO L87 Difference]: Start difference. First operand 15 states and 16 transitions. Second operand has 9 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 9 states have internal predecessors, (16), 4 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 4 states have call successors, (4) [2024-11-28 03:15:45,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 03:15:45,144 INFO L93 Difference]: Finished difference Result 22 states and 23 transitions. [2024-11-28 03:15:45,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-28 03:15:45,145 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 9 states have internal predecessors, (16), 4 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 4 states have call successors, (4) Word has length 16 [2024-11-28 03:15:45,146 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 03:15:45,146 INFO L225 Difference]: With dead ends: 22 [2024-11-28 03:15:45,146 INFO L226 Difference]: Without dead ends: 18 [2024-11-28 03:15:45,147 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 28 SyntacticMatches, 2 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2024-11-28 03:15:45,149 INFO L435 NwaCegarLoop]: 10 mSDtfsCounter, 10 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-28 03:15:45,149 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 30 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-28 03:15:45,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2024-11-28 03:15:45,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2024-11-28 03:15:45,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 12 states have (on average 1.0833333333333333) internal successors, (13), 13 states have internal predecessors, (13), 2 states have call successors, (2), 1 states have call predecessors, (2), 3 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2024-11-28 03:15:45,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 19 transitions. [2024-11-28 03:15:45,158 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 19 transitions. Word has length 16 [2024-11-28 03:15:45,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 03:15:45,158 INFO L471 AbstractCegarLoop]: Abstraction has 18 states and 19 transitions. [2024-11-28 03:15:45,158 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 9 states have internal predecessors, (16), 4 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 4 states have call successors, (4) [2024-11-28 03:15:45,159 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 19 transitions. [2024-11-28 03:15:45,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2024-11-28 03:15:45,159 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 03:15:45,159 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:15:45,171 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be41c75b-8843-4b24-9742-0d657c72db73/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-28 03:15:45,361 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be41c75b-8843-4b24-9742-0d657c72db73/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:15:45,361 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 03:15:45,362 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:15:45,362 INFO L85 PathProgramCache]: Analyzing trace with hash -41010676, now seen corresponding path program 2 times [2024-11-28 03:15:45,362 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:15:45,362 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [982966926] [2024-11-28 03:15:45,362 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 03:15:45,363 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:15:45,387 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 03:15:45,387 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:15:45,587 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-28 03:15:45,587 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:15:45,587 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [982966926] [2024-11-28 03:15:45,588 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [982966926] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 03:15:45,588 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [252515995] [2024-11-28 03:15:45,588 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 03:15:45,588 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:15:45,588 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be41c75b-8843-4b24-9742-0d657c72db73/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:15:45,590 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be41c75b-8843-4b24-9742-0d657c72db73/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:15:45,594 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be41c75b-8843-4b24-9742-0d657c72db73/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-28 03:15:45,666 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 03:15:45,666 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:15:45,667 INFO L256 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-28 03:15:45,668 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:15:45,731 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-11-28 03:15:45,731 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 03:15:46,226 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-28 03:15:46,226 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [252515995] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 03:15:46,226 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 03:15:46,226 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 9] total 12 [2024-11-28 03:15:46,227 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [244640902] [2024-11-28 03:15:46,227 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 03:15:46,227 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-11-28 03:15:46,227 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:15:46,228 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-11-28 03:15:46,228 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2024-11-28 03:15:46,228 INFO L87 Difference]: Start difference. First operand 18 states and 19 transitions. Second operand has 12 states, 10 states have (on average 2.2) internal successors, (22), 12 states have internal predecessors, (22), 5 states have call successors, (5), 1 states have call predecessors, (5), 3 states have return successors, (6), 3 states have call predecessors, (6), 5 states have call successors, (6) [2024-11-28 03:15:46,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 03:15:46,326 INFO L93 Difference]: Finished difference Result 25 states and 26 transitions. [2024-11-28 03:15:46,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-28 03:15:46,327 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 10 states have (on average 2.2) internal successors, (22), 12 states have internal predecessors, (22), 5 states have call successors, (5), 1 states have call predecessors, (5), 3 states have return successors, (6), 3 states have call predecessors, (6), 5 states have call successors, (6) Word has length 22 [2024-11-28 03:15:46,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 03:15:46,328 INFO L225 Difference]: With dead ends: 25 [2024-11-28 03:15:46,328 INFO L226 Difference]: Without dead ends: 21 [2024-11-28 03:15:46,328 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 38 SyntacticMatches, 3 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2024-11-28 03:15:46,329 INFO L435 NwaCegarLoop]: 10 mSDtfsCounter, 12 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-28 03:15:46,329 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 48 Invalid, 46 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-28 03:15:46,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2024-11-28 03:15:46,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2024-11-28 03:15:46,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 14 states have (on average 1.0714285714285714) internal successors, (15), 15 states have internal predecessors, (15), 2 states have call successors, (2), 1 states have call predecessors, (2), 4 states have return successors, (5), 4 states have call predecessors, (5), 2 states have call successors, (5) [2024-11-28 03:15:46,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2024-11-28 03:15:46,340 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 22 [2024-11-28 03:15:46,340 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 03:15:46,340 INFO L471 AbstractCegarLoop]: Abstraction has 21 states and 22 transitions. [2024-11-28 03:15:46,340 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 10 states have (on average 2.2) internal successors, (22), 12 states have internal predecessors, (22), 5 states have call successors, (5), 1 states have call predecessors, (5), 3 states have return successors, (6), 3 states have call predecessors, (6), 5 states have call successors, (6) [2024-11-28 03:15:46,341 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 22 transitions. [2024-11-28 03:15:46,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2024-11-28 03:15:46,341 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 03:15:46,341 INFO L218 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:15:46,351 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be41c75b-8843-4b24-9742-0d657c72db73/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-11-28 03:15:46,546 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be41c75b-8843-4b24-9742-0d657c72db73/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:15:46,546 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 03:15:46,546 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:15:46,546 INFO L85 PathProgramCache]: Analyzing trace with hash 1769866774, now seen corresponding path program 3 times [2024-11-28 03:15:46,546 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:15:46,547 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2078385624] [2024-11-28 03:15:46,547 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-28 03:15:46,547 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:15:46,568 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-11-28 03:15:46,568 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:15:47,034 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 3 proven. 19 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-28 03:15:47,034 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:15:47,034 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2078385624] [2024-11-28 03:15:47,034 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2078385624] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 03:15:47,034 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1041805089] [2024-11-28 03:15:47,034 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-28 03:15:47,034 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:15:47,034 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be41c75b-8843-4b24-9742-0d657c72db73/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:15:47,038 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be41c75b-8843-4b24-9742-0d657c72db73/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:15:47,041 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be41c75b-8843-4b24-9742-0d657c72db73/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-28 03:15:47,091 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-11-28 03:15:47,091 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:15:47,092 INFO L256 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-11-28 03:15:47,093 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:15:47,272 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-11-28 03:15:47,272 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 03:15:48,033 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-28 03:15:48,034 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1041805089] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 03:15:48,034 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 03:15:48,034 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 8, 11] total 26 [2024-11-28 03:15:48,034 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1088091894] [2024-11-28 03:15:48,034 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 03:15:48,035 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2024-11-28 03:15:48,035 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:15:48,036 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2024-11-28 03:15:48,036 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=567, Unknown=0, NotChecked=0, Total=650 [2024-11-28 03:15:48,037 INFO L87 Difference]: Start difference. First operand 21 states and 22 transitions. Second operand has 26 states, 23 states have (on average 1.7391304347826086) internal successors, (40), 22 states have internal predecessors, (40), 9 states have call successors, (9), 1 states have call predecessors, (9), 8 states have return successors, (12), 8 states have call predecessors, (12), 9 states have call successors, (12) [2024-11-28 03:15:48,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 03:15:48,308 INFO L93 Difference]: Finished difference Result 28 states and 29 transitions. [2024-11-28 03:15:48,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-11-28 03:15:48,309 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 23 states have (on average 1.7391304347826086) internal successors, (40), 22 states have internal predecessors, (40), 9 states have call successors, (9), 1 states have call predecessors, (9), 8 states have return successors, (12), 8 states have call predecessors, (12), 9 states have call successors, (12) Word has length 28 [2024-11-28 03:15:48,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 03:15:48,310 INFO L225 Difference]: With dead ends: 28 [2024-11-28 03:15:48,310 INFO L226 Difference]: Without dead ends: 24 [2024-11-28 03:15:48,311 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 42 SyntacticMatches, 4 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 189 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=203, Invalid=919, Unknown=0, NotChecked=0, Total=1122 [2024-11-28 03:15:48,311 INFO L435 NwaCegarLoop]: 9 mSDtfsCounter, 25 mSDsluCounter, 83 mSDsCounter, 0 mSdLazyCounter, 120 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 92 SdHoareTripleChecker+Invalid, 135 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 120 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-28 03:15:48,312 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 92 Invalid, 135 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 120 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-28 03:15:48,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2024-11-28 03:15:48,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2024-11-28 03:15:48,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 16 states have (on average 1.0625) internal successors, (17), 17 states have internal predecessors, (17), 2 states have call successors, (2), 1 states have call predecessors, (2), 5 states have return successors, (6), 5 states have call predecessors, (6), 2 states have call successors, (6) [2024-11-28 03:15:48,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 25 transitions. [2024-11-28 03:15:48,318 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 25 transitions. Word has length 28 [2024-11-28 03:15:48,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 03:15:48,318 INFO L471 AbstractCegarLoop]: Abstraction has 24 states and 25 transitions. [2024-11-28 03:15:48,318 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 23 states have (on average 1.7391304347826086) internal successors, (40), 22 states have internal predecessors, (40), 9 states have call successors, (9), 1 states have call predecessors, (9), 8 states have return successors, (12), 8 states have call predecessors, (12), 9 states have call successors, (12) [2024-11-28 03:15:48,318 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 25 transitions. [2024-11-28 03:15:48,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2024-11-28 03:15:48,319 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 03:15:48,319 INFO L218 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:15:48,328 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be41c75b-8843-4b24-9742-0d657c72db73/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-11-28 03:15:48,523 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be41c75b-8843-4b24-9742-0d657c72db73/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:15:48,523 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 03:15:48,524 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:15:48,524 INFO L85 PathProgramCache]: Analyzing trace with hash 371264716, now seen corresponding path program 4 times [2024-11-28 03:15:48,524 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:15:48,524 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1835198796] [2024-11-28 03:15:48,524 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-28 03:15:48,524 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:15:48,540 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-28 03:15:48,540 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:15:48,716 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2024-11-28 03:15:48,717 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:15:48,717 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1835198796] [2024-11-28 03:15:48,717 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1835198796] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 03:15:48,717 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [699599825] [2024-11-28 03:15:48,717 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-28 03:15:48,720 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:15:48,720 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be41c75b-8843-4b24-9742-0d657c72db73/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:15:48,723 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be41c75b-8843-4b24-9742-0d657c72db73/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:15:48,727 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be41c75b-8843-4b24-9742-0d657c72db73/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-28 03:15:48,791 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-28 03:15:48,791 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:15:48,792 INFO L256 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-11-28 03:15:48,795 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:15:48,876 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2024-11-28 03:15:48,876 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 03:15:50,024 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-11-28 03:15:50,025 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [699599825] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 03:15:50,025 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 03:15:50,025 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 13] total 16 [2024-11-28 03:15:50,025 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1577583182] [2024-11-28 03:15:50,025 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 03:15:50,026 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-11-28 03:15:50,026 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:15:50,027 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-11-28 03:15:50,027 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2024-11-28 03:15:50,029 INFO L87 Difference]: Start difference. First operand 24 states and 25 transitions. Second operand has 16 states, 14 states have (on average 2.142857142857143) internal successors, (30), 16 states have internal predecessors, (30), 8 states have call successors, (8), 1 states have call predecessors, (8), 5 states have return successors, (11), 5 states have call predecessors, (11), 8 states have call successors, (11) [2024-11-28 03:15:50,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 03:15:50,156 INFO L93 Difference]: Finished difference Result 31 states and 32 transitions. [2024-11-28 03:15:50,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-28 03:15:50,157 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 14 states have (on average 2.142857142857143) internal successors, (30), 16 states have internal predecessors, (30), 8 states have call successors, (8), 1 states have call predecessors, (8), 5 states have return successors, (11), 5 states have call predecessors, (11), 8 states have call successors, (11) Word has length 34 [2024-11-28 03:15:50,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 03:15:50,158 INFO L225 Difference]: With dead ends: 31 [2024-11-28 03:15:50,158 INFO L226 Difference]: Without dead ends: 27 [2024-11-28 03:15:50,158 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 60 SyntacticMatches, 5 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=118, Invalid=262, Unknown=0, NotChecked=0, Total=380 [2024-11-28 03:15:50,159 INFO L435 NwaCegarLoop]: 10 mSDtfsCounter, 16 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 55 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-28 03:15:50,160 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 57 Invalid, 55 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-28 03:15:50,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2024-11-28 03:15:50,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2024-11-28 03:15:50,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 18 states have (on average 1.0555555555555556) internal successors, (19), 19 states have internal predecessors, (19), 2 states have call successors, (2), 1 states have call predecessors, (2), 6 states have return successors, (7), 6 states have call predecessors, (7), 2 states have call successors, (7) [2024-11-28 03:15:50,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 28 transitions. [2024-11-28 03:15:50,166 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 28 transitions. Word has length 34 [2024-11-28 03:15:50,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 03:15:50,166 INFO L471 AbstractCegarLoop]: Abstraction has 27 states and 28 transitions. [2024-11-28 03:15:50,167 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 14 states have (on average 2.142857142857143) internal successors, (30), 16 states have internal predecessors, (30), 8 states have call successors, (8), 1 states have call predecessors, (8), 5 states have return successors, (11), 5 states have call predecessors, (11), 8 states have call successors, (11) [2024-11-28 03:15:50,167 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 28 transitions. [2024-11-28 03:15:50,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2024-11-28 03:15:50,168 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 03:15:50,168 INFO L218 NwaCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:15:50,179 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be41c75b-8843-4b24-9742-0d657c72db73/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-11-28 03:15:50,370 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be41c75b-8843-4b24-9742-0d657c72db73/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:15:50,370 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 03:15:50,370 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:15:50,370 INFO L85 PathProgramCache]: Analyzing trace with hash -886339242, now seen corresponding path program 5 times [2024-11-28 03:15:50,370 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:15:50,371 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [208967534] [2024-11-28 03:15:50,371 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-28 03:15:50,371 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:15:50,385 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2024-11-28 03:15:50,385 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:15:50,591 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2024-11-28 03:15:50,591 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:15:50,591 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [208967534] [2024-11-28 03:15:50,591 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [208967534] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 03:15:50,591 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [522732455] [2024-11-28 03:15:50,591 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-28 03:15:50,591 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:15:50,591 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be41c75b-8843-4b24-9742-0d657c72db73/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:15:50,595 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be41c75b-8843-4b24-9742-0d657c72db73/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:15:50,597 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be41c75b-8843-4b24-9742-0d657c72db73/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-28 03:15:50,673 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2024-11-28 03:15:50,673 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:15:50,674 INFO L256 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-11-28 03:15:50,676 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:15:50,738 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2024-11-28 03:15:50,738 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 03:15:52,154 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 65 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-11-28 03:15:52,155 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [522732455] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 03:15:52,155 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 03:15:52,155 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 15] total 17 [2024-11-28 03:15:52,155 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2118769525] [2024-11-28 03:15:52,155 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 03:15:52,156 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-11-28 03:15:52,156 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:15:52,157 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-11-28 03:15:52,157 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=198, Unknown=0, NotChecked=0, Total=272 [2024-11-28 03:15:52,157 INFO L87 Difference]: Start difference. First operand 27 states and 28 transitions. Second operand has 17 states, 15 states have (on average 2.1333333333333333) internal successors, (32), 17 states have internal predecessors, (32), 8 states have call successors, (8), 1 states have call predecessors, (8), 6 states have return successors, (12), 6 states have call predecessors, (12), 8 states have call successors, (12) [2024-11-28 03:15:52,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 03:15:52,276 INFO L93 Difference]: Finished difference Result 34 states and 35 transitions. [2024-11-28 03:15:52,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-28 03:15:52,276 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 15 states have (on average 2.1333333333333333) internal successors, (32), 17 states have internal predecessors, (32), 8 states have call successors, (8), 1 states have call predecessors, (8), 6 states have return successors, (12), 6 states have call predecessors, (12), 8 states have call successors, (12) Word has length 40 [2024-11-28 03:15:52,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 03:15:52,277 INFO L225 Difference]: With dead ends: 34 [2024-11-28 03:15:52,277 INFO L226 Difference]: Without dead ends: 30 [2024-11-28 03:15:52,278 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 72 SyntacticMatches, 6 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=144, Invalid=318, Unknown=0, NotChecked=0, Total=462 [2024-11-28 03:15:52,279 INFO L435 NwaCegarLoop]: 10 mSDtfsCounter, 38 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 68 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-28 03:15:52,281 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [46 Valid, 54 Invalid, 68 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-28 03:15:52,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2024-11-28 03:15:52,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2024-11-28 03:15:52,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 20 states have (on average 1.05) internal successors, (21), 21 states have internal predecessors, (21), 2 states have call successors, (2), 1 states have call predecessors, (2), 7 states have return successors, (8), 7 states have call predecessors, (8), 2 states have call successors, (8) [2024-11-28 03:15:52,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 31 transitions. [2024-11-28 03:15:52,289 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 31 transitions. Word has length 40 [2024-11-28 03:15:52,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 03:15:52,294 INFO L471 AbstractCegarLoop]: Abstraction has 30 states and 31 transitions. [2024-11-28 03:15:52,294 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 15 states have (on average 2.1333333333333333) internal successors, (32), 17 states have internal predecessors, (32), 8 states have call successors, (8), 1 states have call predecessors, (8), 6 states have return successors, (12), 6 states have call predecessors, (12), 8 states have call successors, (12) [2024-11-28 03:15:52,295 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 31 transitions. [2024-11-28 03:15:52,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2024-11-28 03:15:52,295 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 03:15:52,296 INFO L218 NwaCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:15:52,302 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be41c75b-8843-4b24-9742-0d657c72db73/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-11-28 03:15:52,496 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be41c75b-8843-4b24-9742-0d657c72db73/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2024-11-28 03:15:52,496 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 03:15:52,497 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:15:52,497 INFO L85 PathProgramCache]: Analyzing trace with hash -918712436, now seen corresponding path program 6 times [2024-11-28 03:15:52,497 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:15:52,497 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1724585168] [2024-11-28 03:15:52,497 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-28 03:15:52,497 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:15:52,515 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2024-11-28 03:15:52,516 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:15:52,844 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 5 proven. 63 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2024-11-28 03:15:52,845 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:15:52,845 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1724585168] [2024-11-28 03:15:52,845 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1724585168] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 03:15:52,845 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1545519461] [2024-11-28 03:15:52,845 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-28 03:15:52,845 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:15:52,845 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be41c75b-8843-4b24-9742-0d657c72db73/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:15:52,847 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be41c75b-8843-4b24-9742-0d657c72db73/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:15:52,852 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be41c75b-8843-4b24-9742-0d657c72db73/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-28 03:15:52,939 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2024-11-28 03:15:52,939 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:15:52,941 INFO L256 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-11-28 03:15:52,943 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:15:53,063 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2024-11-28 03:15:53,064 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 03:15:55,185 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 93 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2024-11-28 03:15:55,185 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1545519461] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 03:15:55,185 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 03:15:55,185 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11, 17] total 21 [2024-11-28 03:15:55,185 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [45532015] [2024-11-28 03:15:55,185 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 03:15:55,186 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-11-28 03:15:55,186 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:15:55,187 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-11-28 03:15:55,187 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=309, Unknown=0, NotChecked=0, Total=420 [2024-11-28 03:15:55,187 INFO L87 Difference]: Start difference. First operand 30 states and 31 transitions. Second operand has 21 states, 18 states have (on average 2.1666666666666665) internal successors, (39), 21 states have internal predecessors, (39), 10 states have call successors, (10), 1 states have call predecessors, (10), 7 states have return successors, (15), 7 states have call predecessors, (15), 10 states have call successors, (15) [2024-11-28 03:15:55,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 03:15:55,404 INFO L93 Difference]: Finished difference Result 37 states and 38 transitions. [2024-11-28 03:15:55,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-11-28 03:15:55,405 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 18 states have (on average 2.1666666666666665) internal successors, (39), 21 states have internal predecessors, (39), 10 states have call successors, (10), 1 states have call predecessors, (10), 7 states have return successors, (15), 7 states have call predecessors, (15), 10 states have call successors, (15) Word has length 46 [2024-11-28 03:15:55,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 03:15:55,406 INFO L225 Difference]: With dead ends: 37 [2024-11-28 03:15:55,406 INFO L226 Difference]: Without dead ends: 33 [2024-11-28 03:15:55,407 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 80 SyntacticMatches, 9 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 177 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=255, Invalid=557, Unknown=0, NotChecked=0, Total=812 [2024-11-28 03:15:55,408 INFO L435 NwaCegarLoop]: 10 mSDtfsCounter, 73 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 56 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 65 SdHoareTripleChecker+Invalid, 98 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 56 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-28 03:15:55,408 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [74 Valid, 65 Invalid, 98 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 56 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-28 03:15:55,409 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2024-11-28 03:15:55,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2024-11-28 03:15:55,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 22 states have (on average 1.0454545454545454) internal successors, (23), 23 states have internal predecessors, (23), 2 states have call successors, (2), 1 states have call predecessors, (2), 8 states have return successors, (9), 8 states have call predecessors, (9), 2 states have call successors, (9) [2024-11-28 03:15:55,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 34 transitions. [2024-11-28 03:15:55,415 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 34 transitions. Word has length 46 [2024-11-28 03:15:55,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 03:15:55,415 INFO L471 AbstractCegarLoop]: Abstraction has 33 states and 34 transitions. [2024-11-28 03:15:55,415 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 18 states have (on average 2.1666666666666665) internal successors, (39), 21 states have internal predecessors, (39), 10 states have call successors, (10), 1 states have call predecessors, (10), 7 states have return successors, (15), 7 states have call predecessors, (15), 10 states have call successors, (15) [2024-11-28 03:15:55,415 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 34 transitions. [2024-11-28 03:15:55,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2024-11-28 03:15:55,416 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 03:15:55,416 INFO L218 NwaCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:15:55,426 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be41c75b-8843-4b24-9742-0d657c72db73/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2024-11-28 03:15:55,620 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be41c75b-8843-4b24-9742-0d657c72db73/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2024-11-28 03:15:55,620 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 03:15:55,620 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:15:55,620 INFO L85 PathProgramCache]: Analyzing trace with hash -626238314, now seen corresponding path program 7 times [2024-11-28 03:15:55,621 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:15:55,621 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1679317682] [2024-11-28 03:15:55,621 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-28 03:15:55,621 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:15:55,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:15:55,849 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2024-11-28 03:15:55,850 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:15:55,850 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1679317682] [2024-11-28 03:15:55,850 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1679317682] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 03:15:55,850 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1395591899] [2024-11-28 03:15:55,850 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-28 03:15:55,850 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:15:55,851 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be41c75b-8843-4b24-9742-0d657c72db73/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:15:55,853 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be41c75b-8843-4b24-9742-0d657c72db73/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:15:55,862 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be41c75b-8843-4b24-9742-0d657c72db73/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-28 03:15:55,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:15:55,967 INFO L256 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 18 conjuncts are in the unsatisfiable core [2024-11-28 03:15:55,969 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:15:56,051 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2024-11-28 03:15:56,051 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 03:15:59,041 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2024-11-28 03:15:59,042 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1395591899] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 03:15:59,042 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 03:15:59,042 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 19] total 21 [2024-11-28 03:15:59,042 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1845519966] [2024-11-28 03:15:59,042 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 03:15:59,043 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-11-28 03:15:59,043 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:15:59,044 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-11-28 03:15:59,044 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=308, Unknown=0, NotChecked=0, Total=420 [2024-11-28 03:15:59,045 INFO L87 Difference]: Start difference. First operand 33 states and 34 transitions. Second operand has 21 states, 19 states have (on average 2.1052631578947367) internal successors, (40), 21 states have internal predecessors, (40), 10 states have call successors, (10), 1 states have call predecessors, (10), 8 states have return successors, (16), 8 states have call predecessors, (16), 10 states have call successors, (16) [2024-11-28 03:15:59,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 03:15:59,215 INFO L93 Difference]: Finished difference Result 40 states and 41 transitions. [2024-11-28 03:15:59,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-11-28 03:15:59,215 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 19 states have (on average 2.1052631578947367) internal successors, (40), 21 states have internal predecessors, (40), 10 states have call successors, (10), 1 states have call predecessors, (10), 8 states have return successors, (16), 8 states have call predecessors, (16), 10 states have call successors, (16) Word has length 52 [2024-11-28 03:15:59,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 03:15:59,216 INFO L225 Difference]: With dead ends: 40 [2024-11-28 03:15:59,216 INFO L226 Difference]: Without dead ends: 36 [2024-11-28 03:15:59,217 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 94 SyntacticMatches, 8 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 177 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=238, Invalid=518, Unknown=0, NotChecked=0, Total=756 [2024-11-28 03:15:59,218 INFO L435 NwaCegarLoop]: 10 mSDtfsCounter, 31 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 77 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 85 SdHoareTripleChecker+Invalid, 86 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 77 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-28 03:15:59,218 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [41 Valid, 85 Invalid, 86 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 77 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-28 03:15:59,219 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2024-11-28 03:15:59,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2024-11-28 03:15:59,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 24 states have (on average 1.0416666666666667) internal successors, (25), 25 states have internal predecessors, (25), 2 states have call successors, (2), 1 states have call predecessors, (2), 9 states have return successors, (10), 9 states have call predecessors, (10), 2 states have call successors, (10) [2024-11-28 03:15:59,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 37 transitions. [2024-11-28 03:15:59,225 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 37 transitions. Word has length 52 [2024-11-28 03:15:59,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 03:15:59,225 INFO L471 AbstractCegarLoop]: Abstraction has 36 states and 37 transitions. [2024-11-28 03:15:59,226 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 19 states have (on average 2.1052631578947367) internal successors, (40), 21 states have internal predecessors, (40), 10 states have call successors, (10), 1 states have call predecessors, (10), 8 states have return successors, (16), 8 states have call predecessors, (16), 10 states have call successors, (16) [2024-11-28 03:15:59,226 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 37 transitions. [2024-11-28 03:15:59,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2024-11-28 03:15:59,227 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 03:15:59,227 INFO L218 NwaCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:15:59,237 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be41c75b-8843-4b24-9742-0d657c72db73/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2024-11-28 03:15:59,431 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be41c75b-8843-4b24-9742-0d657c72db73/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2024-11-28 03:15:59,431 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 03:15:59,431 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:15:59,432 INFO L85 PathProgramCache]: Analyzing trace with hash -960511412, now seen corresponding path program 8 times [2024-11-28 03:15:59,432 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:15:59,432 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1460007656] [2024-11-28 03:15:59,432 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 03:15:59,432 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:15:59,453 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 03:15:59,453 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:15:59,754 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 8 proven. 100 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2024-11-28 03:15:59,754 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:15:59,754 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1460007656] [2024-11-28 03:15:59,754 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1460007656] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 03:15:59,754 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [140738251] [2024-11-28 03:15:59,754 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 03:15:59,755 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:15:59,755 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be41c75b-8843-4b24-9742-0d657c72db73/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:15:59,757 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be41c75b-8843-4b24-9742-0d657c72db73/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:15:59,761 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be41c75b-8843-4b24-9742-0d657c72db73/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-28 03:15:59,921 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 03:15:59,921 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:15:59,922 INFO L256 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 20 conjuncts are in the unsatisfiable core [2024-11-28 03:15:59,928 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:16:00,016 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2024-11-28 03:16:00,016 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 03:16:03,792 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 164 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2024-11-28 03:16:03,792 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [140738251] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 03:16:03,792 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 03:16:03,792 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 21] total 24 [2024-11-28 03:16:03,792 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [332617777] [2024-11-28 03:16:03,793 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 03:16:03,793 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-11-28 03:16:03,793 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:16:03,794 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-11-28 03:16:03,794 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=146, Invalid=406, Unknown=0, NotChecked=0, Total=552 [2024-11-28 03:16:03,794 INFO L87 Difference]: Start difference. First operand 36 states and 37 transitions. Second operand has 24 states, 22 states have (on average 2.090909090909091) internal successors, (46), 24 states have internal predecessors, (46), 11 states have call successors, (11), 1 states have call predecessors, (11), 9 states have return successors, (18), 9 states have call predecessors, (18), 11 states have call successors, (18) [2024-11-28 03:16:03,979 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 03:16:03,979 INFO L93 Difference]: Finished difference Result 43 states and 44 transitions. [2024-11-28 03:16:03,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-11-28 03:16:03,980 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 22 states have (on average 2.090909090909091) internal successors, (46), 24 states have internal predecessors, (46), 11 states have call successors, (11), 1 states have call predecessors, (11), 9 states have return successors, (18), 9 states have call predecessors, (18), 11 states have call successors, (18) Word has length 58 [2024-11-28 03:16:03,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 03:16:03,980 INFO L225 Difference]: With dead ends: 43 [2024-11-28 03:16:03,980 INFO L226 Difference]: Without dead ends: 39 [2024-11-28 03:16:03,981 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 104 SyntacticMatches, 9 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 263 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=314, Invalid=678, Unknown=0, NotChecked=0, Total=992 [2024-11-28 03:16:03,982 INFO L435 NwaCegarLoop]: 10 mSDtfsCounter, 59 mSDsluCounter, 63 mSDsCounter, 0 mSdLazyCounter, 66 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 73 SdHoareTripleChecker+Invalid, 91 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 66 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-28 03:16:03,982 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [70 Valid, 73 Invalid, 91 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 66 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-28 03:16:03,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2024-11-28 03:16:03,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2024-11-28 03:16:03,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 26 states have (on average 1.0384615384615385) internal successors, (27), 27 states have internal predecessors, (27), 2 states have call successors, (2), 1 states have call predecessors, (2), 10 states have return successors, (11), 10 states have call predecessors, (11), 2 states have call successors, (11) [2024-11-28 03:16:03,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 40 transitions. [2024-11-28 03:16:03,994 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 40 transitions. Word has length 58 [2024-11-28 03:16:03,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 03:16:03,994 INFO L471 AbstractCegarLoop]: Abstraction has 39 states and 40 transitions. [2024-11-28 03:16:03,995 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 22 states have (on average 2.090909090909091) internal successors, (46), 24 states have internal predecessors, (46), 11 states have call successors, (11), 1 states have call predecessors, (11), 9 states have return successors, (18), 9 states have call predecessors, (18), 11 states have call successors, (18) [2024-11-28 03:16:03,995 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 40 transitions. [2024-11-28 03:16:03,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2024-11-28 03:16:03,997 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 03:16:03,998 INFO L218 NwaCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:16:04,008 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be41c75b-8843-4b24-9742-0d657c72db73/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-11-28 03:16:04,198 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be41c75b-8843-4b24-9742-0d657c72db73/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2024-11-28 03:16:04,199 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 03:16:04,199 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:16:04,199 INFO L85 PathProgramCache]: Analyzing trace with hash -366706730, now seen corresponding path program 9 times [2024-11-28 03:16:04,199 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:16:04,199 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1276867613] [2024-11-28 03:16:04,199 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-28 03:16:04,199 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:16:04,221 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2024-11-28 03:16:04,222 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:16:04,536 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 8 proven. 135 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2024-11-28 03:16:04,536 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:16:04,536 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1276867613] [2024-11-28 03:16:04,536 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1276867613] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 03:16:04,536 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1441242962] [2024-11-28 03:16:04,536 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-28 03:16:04,537 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:16:04,537 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be41c75b-8843-4b24-9742-0d657c72db73/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:16:04,538 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be41c75b-8843-4b24-9742-0d657c72db73/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:16:04,540 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be41c75b-8843-4b24-9742-0d657c72db73/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-11-28 03:16:04,707 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2024-11-28 03:16:04,708 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:16:04,709 INFO L256 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 22 conjuncts are in the unsatisfiable core [2024-11-28 03:16:04,711 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:16:04,812 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2024-11-28 03:16:04,812 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 03:16:09,478 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 207 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2024-11-28 03:16:09,478 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1441242962] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 03:16:09,478 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 03:16:09,479 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14, 23] total 27 [2024-11-28 03:16:09,479 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1918497326] [2024-11-28 03:16:09,479 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 03:16:09,479 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2024-11-28 03:16:09,479 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:16:09,480 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2024-11-28 03:16:09,480 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=183, Invalid=519, Unknown=0, NotChecked=0, Total=702 [2024-11-28 03:16:09,480 INFO L87 Difference]: Start difference. First operand 39 states and 40 transitions. Second operand has 27 states, 24 states have (on average 2.125) internal successors, (51), 27 states have internal predecessors, (51), 13 states have call successors, (13), 1 states have call predecessors, (13), 10 states have return successors, (21), 10 states have call predecessors, (21), 13 states have call successors, (21) [2024-11-28 03:16:09,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 03:16:09,754 INFO L93 Difference]: Finished difference Result 46 states and 47 transitions. [2024-11-28 03:16:09,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-11-28 03:16:09,755 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 24 states have (on average 2.125) internal successors, (51), 27 states have internal predecessors, (51), 13 states have call successors, (13), 1 states have call predecessors, (13), 10 states have return successors, (21), 10 states have call predecessors, (21), 13 states have call successors, (21) Word has length 64 [2024-11-28 03:16:09,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 03:16:09,755 INFO L225 Difference]: With dead ends: 46 [2024-11-28 03:16:09,756 INFO L226 Difference]: Without dead ends: 42 [2024-11-28 03:16:09,756 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 113 SyntacticMatches, 12 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 342 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=447, Invalid=959, Unknown=0, NotChecked=0, Total=1406 [2024-11-28 03:16:09,757 INFO L435 NwaCegarLoop]: 10 mSDtfsCounter, 42 mSDsluCounter, 89 mSDsCounter, 0 mSdLazyCounter, 89 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 99 SdHoareTripleChecker+Invalid, 111 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 89 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-28 03:16:09,757 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [43 Valid, 99 Invalid, 111 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 89 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-28 03:16:09,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2024-11-28 03:16:09,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2024-11-28 03:16:09,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 28 states have (on average 1.0357142857142858) internal successors, (29), 29 states have internal predecessors, (29), 2 states have call successors, (2), 1 states have call predecessors, (2), 11 states have return successors, (12), 11 states have call predecessors, (12), 2 states have call successors, (12) [2024-11-28 03:16:09,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 43 transitions. [2024-11-28 03:16:09,764 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 43 transitions. Word has length 64 [2024-11-28 03:16:09,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 03:16:09,764 INFO L471 AbstractCegarLoop]: Abstraction has 42 states and 43 transitions. [2024-11-28 03:16:09,764 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 24 states have (on average 2.125) internal successors, (51), 27 states have internal predecessors, (51), 13 states have call successors, (13), 1 states have call predecessors, (13), 10 states have return successors, (21), 10 states have call predecessors, (21), 13 states have call successors, (21) [2024-11-28 03:16:09,764 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 43 transitions. [2024-11-28 03:16:09,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2024-11-28 03:16:09,765 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 03:16:09,765 INFO L218 NwaCegarLoop]: trace histogram [11, 11, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:16:09,774 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be41c75b-8843-4b24-9742-0d657c72db73/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2024-11-28 03:16:09,966 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be41c75b-8843-4b24-9742-0d657c72db73/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:16:09,966 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 03:16:09,967 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:16:09,967 INFO L85 PathProgramCache]: Analyzing trace with hash -1719425780, now seen corresponding path program 10 times [2024-11-28 03:16:09,967 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:16:09,967 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [319209233] [2024-11-28 03:16:09,967 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-28 03:16:09,967 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:16:09,999 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-28 03:16:10,000 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:16:10,297 INFO L134 CoverageAnalysis]: Checked inductivity of 310 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 136 trivial. 0 not checked. [2024-11-28 03:16:10,298 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:16:10,298 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [319209233] [2024-11-28 03:16:10,298 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [319209233] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 03:16:10,298 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [529483132] [2024-11-28 03:16:10,298 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-28 03:16:10,298 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:16:10,298 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be41c75b-8843-4b24-9742-0d657c72db73/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:16:10,300 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be41c75b-8843-4b24-9742-0d657c72db73/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:16:10,303 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be41c75b-8843-4b24-9742-0d657c72db73/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-11-28 03:16:10,536 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-28 03:16:10,537 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:16:10,538 INFO L256 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 24 conjuncts are in the unsatisfiable core [2024-11-28 03:16:10,540 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:16:10,642 INFO L134 CoverageAnalysis]: Checked inductivity of 310 backedges. 0 proven. 155 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2024-11-28 03:16:10,642 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 03:16:16,475 INFO L134 CoverageAnalysis]: Checked inductivity of 310 backedges. 0 proven. 255 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2024-11-28 03:16:16,476 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [529483132] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 03:16:16,476 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 03:16:16,476 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 25] total 28 [2024-11-28 03:16:16,476 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [774685207] [2024-11-28 03:16:16,477 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 03:16:16,477 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2024-11-28 03:16:16,478 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:16:16,479 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2024-11-28 03:16:16,483 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=198, Invalid=558, Unknown=0, NotChecked=0, Total=756 [2024-11-28 03:16:16,483 INFO L87 Difference]: Start difference. First operand 42 states and 43 transitions. Second operand has 28 states, 26 states have (on average 2.076923076923077) internal successors, (54), 28 states have internal predecessors, (54), 14 states have call successors, (14), 1 states have call predecessors, (14), 11 states have return successors, (23), 11 states have call predecessors, (23), 14 states have call successors, (23) [2024-11-28 03:16:16,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 03:16:16,677 INFO L93 Difference]: Finished difference Result 49 states and 50 transitions. [2024-11-28 03:16:16,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-11-28 03:16:16,678 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 26 states have (on average 2.076923076923077) internal successors, (54), 28 states have internal predecessors, (54), 14 states have call successors, (14), 1 states have call predecessors, (14), 11 states have return successors, (23), 11 states have call predecessors, (23), 14 states have call successors, (23) Word has length 70 [2024-11-28 03:16:16,678 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 03:16:16,679 INFO L225 Difference]: With dead ends: 49 [2024-11-28 03:16:16,679 INFO L226 Difference]: Without dead ends: 45 [2024-11-28 03:16:16,680 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 126 SyntacticMatches, 11 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 365 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=448, Invalid=958, Unknown=0, NotChecked=0, Total=1406 [2024-11-28 03:16:16,680 INFO L435 NwaCegarLoop]: 10 mSDtfsCounter, 119 mSDsluCounter, 86 mSDsCounter, 0 mSdLazyCounter, 86 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 132 SdHoareTripleChecker+Valid, 96 SdHoareTripleChecker+Invalid, 141 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 86 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-28 03:16:16,680 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [132 Valid, 96 Invalid, 141 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 86 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-28 03:16:16,682 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2024-11-28 03:16:16,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2024-11-28 03:16:16,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 30 states have (on average 1.0333333333333334) internal successors, (31), 31 states have internal predecessors, (31), 2 states have call successors, (2), 1 states have call predecessors, (2), 12 states have return successors, (13), 12 states have call predecessors, (13), 2 states have call successors, (13) [2024-11-28 03:16:16,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 46 transitions. [2024-11-28 03:16:16,688 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 46 transitions. Word has length 70 [2024-11-28 03:16:16,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 03:16:16,688 INFO L471 AbstractCegarLoop]: Abstraction has 45 states and 46 transitions. [2024-11-28 03:16:16,688 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 26 states have (on average 2.076923076923077) internal successors, (54), 28 states have internal predecessors, (54), 14 states have call successors, (14), 1 states have call predecessors, (14), 11 states have return successors, (23), 11 states have call predecessors, (23), 14 states have call successors, (23) [2024-11-28 03:16:16,689 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 46 transitions. [2024-11-28 03:16:16,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2024-11-28 03:16:16,689 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 03:16:16,689 INFO L218 NwaCegarLoop]: trace histogram [12, 12, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:16:16,699 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be41c75b-8843-4b24-9742-0d657c72db73/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2024-11-28 03:16:16,890 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be41c75b-8843-4b24-9742-0d657c72db73/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:16:16,890 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 03:16:16,890 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:16:16,890 INFO L85 PathProgramCache]: Analyzing trace with hash 1354232598, now seen corresponding path program 11 times [2024-11-28 03:16:16,891 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:16:16,891 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [478765297] [2024-11-28 03:16:16,891 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-28 03:16:16,891 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:16:16,918 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2024-11-28 03:16:16,918 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:16:17,251 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 0 proven. 187 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2024-11-28 03:16:17,251 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:16:17,251 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [478765297] [2024-11-28 03:16:17,251 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [478765297] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 03:16:17,251 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1504326498] [2024-11-28 03:16:17,251 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-28 03:16:17,252 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:16:17,252 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be41c75b-8843-4b24-9742-0d657c72db73/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:16:17,254 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be41c75b-8843-4b24-9742-0d657c72db73/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:16:17,257 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be41c75b-8843-4b24-9742-0d657c72db73/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-11-28 03:16:17,570 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2024-11-28 03:16:17,570 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:16:17,572 INFO L256 TraceCheckSpWp]: Trace formula consists of 246 conjuncts, 26 conjuncts are in the unsatisfiable core [2024-11-28 03:16:17,574 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:16:17,664 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 0 proven. 187 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2024-11-28 03:16:17,664 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 03:16:25,278 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 0 proven. 308 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2024-11-28 03:16:25,278 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1504326498] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 03:16:25,278 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 03:16:25,278 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 27] total 29 [2024-11-28 03:16:25,279 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2098897738] [2024-11-28 03:16:25,279 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 03:16:25,279 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2024-11-28 03:16:25,279 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:16:25,280 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2024-11-28 03:16:25,280 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=600, Unknown=0, NotChecked=0, Total=812 [2024-11-28 03:16:25,281 INFO L87 Difference]: Start difference. First operand 45 states and 46 transitions. Second operand has 29 states, 27 states have (on average 2.074074074074074) internal successors, (56), 29 states have internal predecessors, (56), 14 states have call successors, (14), 1 states have call predecessors, (14), 12 states have return successors, (24), 12 states have call predecessors, (24), 14 states have call successors, (24) [2024-11-28 03:16:25,476 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 03:16:25,476 INFO L93 Difference]: Finished difference Result 52 states and 53 transitions. [2024-11-28 03:16:25,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-11-28 03:16:25,477 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 27 states have (on average 2.074074074074074) internal successors, (56), 29 states have internal predecessors, (56), 14 states have call successors, (14), 1 states have call predecessors, (14), 12 states have return successors, (24), 12 states have call predecessors, (24), 14 states have call successors, (24) Word has length 76 [2024-11-28 03:16:25,477 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 03:16:25,478 INFO L225 Difference]: With dead ends: 52 [2024-11-28 03:16:25,478 INFO L226 Difference]: Without dead ends: 48 [2024-11-28 03:16:25,478 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 188 GetRequests, 138 SyntacticMatches, 12 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 409 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=498, Invalid=1062, Unknown=0, NotChecked=0, Total=1560 [2024-11-28 03:16:25,479 INFO L435 NwaCegarLoop]: 10 mSDtfsCounter, 26 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 91 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 102 SdHoareTripleChecker+Invalid, 92 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 91 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-28 03:16:25,479 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [40 Valid, 102 Invalid, 92 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 91 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-28 03:16:25,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2024-11-28 03:16:25,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2024-11-28 03:16:25,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 32 states have (on average 1.03125) internal successors, (33), 33 states have internal predecessors, (33), 2 states have call successors, (2), 1 states have call predecessors, (2), 13 states have return successors, (14), 13 states have call predecessors, (14), 2 states have call successors, (14) [2024-11-28 03:16:25,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 49 transitions. [2024-11-28 03:16:25,486 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 49 transitions. Word has length 76 [2024-11-28 03:16:25,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 03:16:25,487 INFO L471 AbstractCegarLoop]: Abstraction has 48 states and 49 transitions. [2024-11-28 03:16:25,487 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 27 states have (on average 2.074074074074074) internal successors, (56), 29 states have internal predecessors, (56), 14 states have call successors, (14), 1 states have call predecessors, (14), 12 states have return successors, (24), 12 states have call predecessors, (24), 14 states have call successors, (24) [2024-11-28 03:16:25,487 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 49 transitions. [2024-11-28 03:16:25,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2024-11-28 03:16:25,488 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 03:16:25,488 INFO L218 NwaCegarLoop]: trace histogram [13, 13, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:16:25,499 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be41c75b-8843-4b24-9742-0d657c72db73/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2024-11-28 03:16:25,688 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be41c75b-8843-4b24-9742-0d657c72db73/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:16:25,689 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 03:16:25,689 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:16:25,689 INFO L85 PathProgramCache]: Analyzing trace with hash 1734686668, now seen corresponding path program 12 times [2024-11-28 03:16:25,689 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:16:25,689 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1214649393] [2024-11-28 03:16:25,689 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-28 03:16:25,689 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:16:25,731 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2024-11-28 03:16:25,731 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:16:26,093 INFO L134 CoverageAnalysis]: Checked inductivity of 444 backedges. 11 proven. 234 refuted. 0 times theorem prover too weak. 199 trivial. 0 not checked. [2024-11-28 03:16:26,093 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:16:26,094 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1214649393] [2024-11-28 03:16:26,094 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1214649393] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 03:16:26,094 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1431468429] [2024-11-28 03:16:26,094 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-28 03:16:26,094 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:16:26,094 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be41c75b-8843-4b24-9742-0d657c72db73/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:16:26,096 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be41c75b-8843-4b24-9742-0d657c72db73/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:16:26,097 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be41c75b-8843-4b24-9742-0d657c72db73/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-11-28 03:16:26,487 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2024-11-28 03:16:26,488 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:16:26,489 INFO L256 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 28 conjuncts are in the unsatisfiable core [2024-11-28 03:16:26,492 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:16:26,608 INFO L134 CoverageAnalysis]: Checked inductivity of 444 backedges. 0 proven. 222 refuted. 0 times theorem prover too weak. 222 trivial. 0 not checked. [2024-11-28 03:16:26,608 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 03:16:36,387 INFO L134 CoverageAnalysis]: Checked inductivity of 444 backedges. 0 proven. 366 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2024-11-28 03:16:36,387 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1431468429] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 03:16:36,387 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 03:16:36,387 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 17, 29] total 33 [2024-11-28 03:16:36,387 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [190546533] [2024-11-28 03:16:36,387 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 03:16:36,388 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2024-11-28 03:16:36,388 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:16:36,388 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2024-11-28 03:16:36,389 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=273, Invalid=783, Unknown=0, NotChecked=0, Total=1056 [2024-11-28 03:16:36,389 INFO L87 Difference]: Start difference. First operand 48 states and 49 transitions. Second operand has 33 states, 30 states have (on average 2.1) internal successors, (63), 33 states have internal predecessors, (63), 16 states have call successors, (16), 1 states have call predecessors, (16), 13 states have return successors, (27), 13 states have call predecessors, (27), 16 states have call successors, (27) [2024-11-28 03:16:36,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 03:16:36,793 INFO L93 Difference]: Finished difference Result 55 states and 56 transitions. [2024-11-28 03:16:36,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2024-11-28 03:16:36,794 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 30 states have (on average 2.1) internal successors, (63), 33 states have internal predecessors, (63), 16 states have call successors, (16), 1 states have call predecessors, (16), 13 states have return successors, (27), 13 states have call predecessors, (27), 16 states have call successors, (27) Word has length 82 [2024-11-28 03:16:36,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 03:16:36,795 INFO L225 Difference]: With dead ends: 55 [2024-11-28 03:16:36,795 INFO L226 Difference]: Without dead ends: 51 [2024-11-28 03:16:36,795 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 206 GetRequests, 146 SyntacticMatches, 15 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 561 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=693, Invalid=1469, Unknown=0, NotChecked=0, Total=2162 [2024-11-28 03:16:36,796 INFO L435 NwaCegarLoop]: 10 mSDtfsCounter, 123 mSDsluCounter, 96 mSDsCounter, 0 mSdLazyCounter, 98 mSolverCounterSat, 69 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 124 SdHoareTripleChecker+Valid, 106 SdHoareTripleChecker+Invalid, 167 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 69 IncrementalHoareTripleChecker+Valid, 98 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-28 03:16:36,796 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [124 Valid, 106 Invalid, 167 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [69 Valid, 98 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-28 03:16:36,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2024-11-28 03:16:36,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2024-11-28 03:16:36,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 34 states have (on average 1.0294117647058822) internal successors, (35), 35 states have internal predecessors, (35), 2 states have call successors, (2), 1 states have call predecessors, (2), 14 states have return successors, (15), 14 states have call predecessors, (15), 2 states have call successors, (15) [2024-11-28 03:16:36,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 52 transitions. [2024-11-28 03:16:36,803 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 52 transitions. Word has length 82 [2024-11-28 03:16:36,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 03:16:36,804 INFO L471 AbstractCegarLoop]: Abstraction has 51 states and 52 transitions. [2024-11-28 03:16:36,804 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 30 states have (on average 2.1) internal successors, (63), 33 states have internal predecessors, (63), 16 states have call successors, (16), 1 states have call predecessors, (16), 13 states have return successors, (27), 13 states have call predecessors, (27), 16 states have call successors, (27) [2024-11-28 03:16:36,804 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 52 transitions. [2024-11-28 03:16:36,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2024-11-28 03:16:36,805 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 03:16:36,805 INFO L218 NwaCegarLoop]: trace histogram [14, 14, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:16:36,817 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be41c75b-8843-4b24-9742-0d657c72db73/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2024-11-28 03:16:37,006 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be41c75b-8843-4b24-9742-0d657c72db73/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:16:37,006 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 03:16:37,006 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:16:37,006 INFO L85 PathProgramCache]: Analyzing trace with hash -1433749930, now seen corresponding path program 13 times [2024-11-28 03:16:37,006 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:16:37,007 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [590324912] [2024-11-28 03:16:37,007 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-28 03:16:37,007 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:16:37,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:16:37,395 INFO L134 CoverageAnalysis]: Checked inductivity of 520 backedges. 0 proven. 260 refuted. 0 times theorem prover too weak. 260 trivial. 0 not checked. [2024-11-28 03:16:37,395 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:16:37,396 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [590324912] [2024-11-28 03:16:37,396 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [590324912] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 03:16:37,396 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1263079167] [2024-11-28 03:16:37,396 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-28 03:16:37,396 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:16:37,396 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be41c75b-8843-4b24-9742-0d657c72db73/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:16:37,398 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be41c75b-8843-4b24-9742-0d657c72db73/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:16:37,403 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be41c75b-8843-4b24-9742-0d657c72db73/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-11-28 03:16:37,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:16:37,909 INFO L256 TraceCheckSpWp]: Trace formula consists of 282 conjuncts, 30 conjuncts are in the unsatisfiable core [2024-11-28 03:16:37,911 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:16:38,004 INFO L134 CoverageAnalysis]: Checked inductivity of 520 backedges. 0 proven. 260 refuted. 0 times theorem prover too weak. 260 trivial. 0 not checked. [2024-11-28 03:16:38,005 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 03:16:50,827 INFO L134 CoverageAnalysis]: Checked inductivity of 520 backedges. 0 proven. 429 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2024-11-28 03:16:50,828 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1263079167] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 03:16:50,828 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 03:16:50,828 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 31] total 33 [2024-11-28 03:16:50,828 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [526056220] [2024-11-28 03:16:50,828 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 03:16:50,829 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2024-11-28 03:16:50,829 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:16:50,829 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2024-11-28 03:16:50,831 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=274, Invalid=782, Unknown=0, NotChecked=0, Total=1056 [2024-11-28 03:16:50,831 INFO L87 Difference]: Start difference. First operand 51 states and 52 transitions. Second operand has 33 states, 31 states have (on average 2.064516129032258) internal successors, (64), 33 states have internal predecessors, (64), 16 states have call successors, (16), 1 states have call predecessors, (16), 14 states have return successors, (28), 14 states have call predecessors, (28), 16 states have call successors, (28) [2024-11-28 03:16:51,067 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 03:16:51,067 INFO L93 Difference]: Finished difference Result 58 states and 59 transitions. [2024-11-28 03:16:51,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2024-11-28 03:16:51,068 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 31 states have (on average 2.064516129032258) internal successors, (64), 33 states have internal predecessors, (64), 16 states have call successors, (16), 1 states have call predecessors, (16), 14 states have return successors, (28), 14 states have call predecessors, (28), 16 states have call successors, (28) Word has length 88 [2024-11-28 03:16:51,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 03:16:51,069 INFO L225 Difference]: With dead ends: 58 [2024-11-28 03:16:51,069 INFO L226 Difference]: Without dead ends: 54 [2024-11-28 03:16:51,070 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 218 GetRequests, 160 SyntacticMatches, 14 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 561 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=664, Invalid=1406, Unknown=0, NotChecked=0, Total=2070 [2024-11-28 03:16:51,071 INFO L435 NwaCegarLoop]: 10 mSDtfsCounter, 30 mSDsluCounter, 100 mSDsCounter, 0 mSdLazyCounter, 102 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 110 SdHoareTripleChecker+Invalid, 103 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 102 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-28 03:16:51,071 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [46 Valid, 110 Invalid, 103 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 102 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-28 03:16:51,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2024-11-28 03:16:51,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2024-11-28 03:16:51,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 36 states have (on average 1.0277777777777777) internal successors, (37), 37 states have internal predecessors, (37), 2 states have call successors, (2), 1 states have call predecessors, (2), 15 states have return successors, (16), 15 states have call predecessors, (16), 2 states have call successors, (16) [2024-11-28 03:16:51,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 55 transitions. [2024-11-28 03:16:51,083 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 55 transitions. Word has length 88 [2024-11-28 03:16:51,084 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 03:16:51,084 INFO L471 AbstractCegarLoop]: Abstraction has 54 states and 55 transitions. [2024-11-28 03:16:51,084 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 31 states have (on average 2.064516129032258) internal successors, (64), 33 states have internal predecessors, (64), 16 states have call successors, (16), 1 states have call predecessors, (16), 14 states have return successors, (28), 14 states have call predecessors, (28), 16 states have call successors, (28) [2024-11-28 03:16:51,084 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 55 transitions. [2024-11-28 03:16:51,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2024-11-28 03:16:51,086 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 03:16:51,087 INFO L218 NwaCegarLoop]: trace histogram [15, 15, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:16:51,099 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be41c75b-8843-4b24-9742-0d657c72db73/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2024-11-28 03:16:51,291 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be41c75b-8843-4b24-9742-0d657c72db73/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:16:51,291 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 03:16:51,292 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:16:51,292 INFO L85 PathProgramCache]: Analyzing trace with hash -1321174388, now seen corresponding path program 14 times [2024-11-28 03:16:51,292 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:16:51,292 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [585948756] [2024-11-28 03:16:51,292 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 03:16:51,292 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:16:51,326 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 03:16:51,326 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:16:51,807 INFO L134 CoverageAnalysis]: Checked inductivity of 602 backedges. 14 proven. 301 refuted. 0 times theorem prover too weak. 287 trivial. 0 not checked. [2024-11-28 03:16:51,808 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:16:51,808 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [585948756] [2024-11-28 03:16:51,808 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [585948756] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 03:16:51,808 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1065364354] [2024-11-28 03:16:51,808 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 03:16:51,808 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:16:51,808 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be41c75b-8843-4b24-9742-0d657c72db73/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:16:51,810 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be41c75b-8843-4b24-9742-0d657c72db73/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:16:51,814 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be41c75b-8843-4b24-9742-0d657c72db73/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-11-28 03:16:52,459 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 03:16:52,459 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:16:52,465 INFO L256 TraceCheckSpWp]: Trace formula consists of 300 conjuncts, 32 conjuncts are in the unsatisfiable core [2024-11-28 03:16:52,467 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:16:52,577 INFO L134 CoverageAnalysis]: Checked inductivity of 602 backedges. 0 proven. 301 refuted. 0 times theorem prover too weak. 301 trivial. 0 not checked. [2024-11-28 03:16:52,577 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 03:17:08,554 INFO L134 CoverageAnalysis]: Checked inductivity of 602 backedges. 0 proven. 497 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2024-11-28 03:17:08,555 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1065364354] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 03:17:08,555 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 03:17:08,555 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19, 33] total 35 [2024-11-28 03:17:08,555 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [868701515] [2024-11-28 03:17:08,555 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 03:17:08,556 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2024-11-28 03:17:08,556 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:17:08,557 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2024-11-28 03:17:08,557 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=323, Invalid=867, Unknown=0, NotChecked=0, Total=1190 [2024-11-28 03:17:08,557 INFO L87 Difference]: Start difference. First operand 54 states and 55 transitions. Second operand has 35 states, 34 states have (on average 2.0294117647058822) internal successors, (69), 35 states have internal predecessors, (69), 16 states have call successors, (16), 1 states have call predecessors, (16), 15 states have return successors, (29), 15 states have call predecessors, (29), 16 states have call successors, (29) [2024-11-28 03:17:08,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 03:17:08,841 INFO L93 Difference]: Finished difference Result 61 states and 62 transitions. [2024-11-28 03:17:08,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-11-28 03:17:08,842 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 34 states have (on average 2.0294117647058822) internal successors, (69), 35 states have internal predecessors, (69), 16 states have call successors, (16), 1 states have call predecessors, (16), 15 states have return successors, (29), 15 states have call predecessors, (29), 16 states have call successors, (29) Word has length 94 [2024-11-28 03:17:08,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 03:17:08,842 INFO L225 Difference]: With dead ends: 61 [2024-11-28 03:17:08,843 INFO L226 Difference]: Without dead ends: 57 [2024-11-28 03:17:08,843 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 233 GetRequests, 170 SyntacticMatches, 16 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 662 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=785, Invalid=1567, Unknown=0, NotChecked=0, Total=2352 [2024-11-28 03:17:08,844 INFO L435 NwaCegarLoop]: 10 mSDtfsCounter, 62 mSDsluCounter, 110 mSDsCounter, 0 mSdLazyCounter, 110 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 79 SdHoareTripleChecker+Valid, 120 SdHoareTripleChecker+Invalid, 126 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 110 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-28 03:17:08,844 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [79 Valid, 120 Invalid, 126 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 110 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-28 03:17:08,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2024-11-28 03:17:08,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2024-11-28 03:17:08,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 38 states have (on average 1.0263157894736843) internal successors, (39), 39 states have internal predecessors, (39), 2 states have call successors, (2), 1 states have call predecessors, (2), 16 states have return successors, (17), 16 states have call predecessors, (17), 2 states have call successors, (17) [2024-11-28 03:17:08,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 58 transitions. [2024-11-28 03:17:08,855 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 58 transitions. Word has length 94 [2024-11-28 03:17:08,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 03:17:08,855 INFO L471 AbstractCegarLoop]: Abstraction has 57 states and 58 transitions. [2024-11-28 03:17:08,856 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 34 states have (on average 2.0294117647058822) internal successors, (69), 35 states have internal predecessors, (69), 16 states have call successors, (16), 1 states have call predecessors, (16), 15 states have return successors, (29), 15 states have call predecessors, (29), 16 states have call successors, (29) [2024-11-28 03:17:08,856 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 58 transitions. [2024-11-28 03:17:08,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2024-11-28 03:17:08,856 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 03:17:08,860 INFO L218 NwaCegarLoop]: trace histogram [16, 16, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:17:08,872 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be41c75b-8843-4b24-9742-0d657c72db73/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2024-11-28 03:17:09,060 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be41c75b-8843-4b24-9742-0d657c72db73/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2024-11-28 03:17:09,060 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 03:17:09,061 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:17:09,061 INFO L85 PathProgramCache]: Analyzing trace with hash 415287702, now seen corresponding path program 15 times [2024-11-28 03:17:09,061 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:17:09,061 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [196182277] [2024-11-28 03:17:09,061 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-28 03:17:09,061 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:17:09,111 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2024-11-28 03:17:09,111 INFO L230 tOrderPrioritization]: Conjunction of SSA is sat [2024-11-28 03:17:09,111 INFO L357 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-11-28 03:17:09,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-11-28 03:17:09,190 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2024-11-28 03:17:09,191 INFO L340 BasicCegarLoop]: Counterexample is feasible [2024-11-28 03:17:09,192 INFO L782 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2024-11-28 03:17:09,193 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-11-28 03:17:09,200 INFO L422 BasicCegarLoop]: Path program histogram: [15, 1] [2024-11-28 03:17:09,233 INFO L170 ceAbstractionStarter]: Computing trace abstraction results [2024-11-28 03:17:09,236 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 28.11 03:17:09 BoogieIcfgContainer [2024-11-28 03:17:09,237 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2024-11-28 03:17:09,238 INFO L112 PluginConnector]: ------------------------Witness Printer---------------------------- [2024-11-28 03:17:09,238 INFO L270 PluginConnector]: Initializing Witness Printer... [2024-11-28 03:17:09,238 INFO L274 PluginConnector]: Witness Printer initialized [2024-11-28 03:17:09,239 INFO L184 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 03:15:43" (3/4) ... [2024-11-28 03:17:09,240 INFO L140 WitnessPrinter]: Generating witness for reachability counterexample [2024-11-28 03:17:09,296 INFO L129 tionWitnessGenerator]: Generated YAML witness of length 50. [2024-11-28 03:17:09,398 INFO L149 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be41c75b-8843-4b24-9742-0d657c72db73/bin/uautomizer-verify-aQ6SnzHsRB/witness.graphml [2024-11-28 03:17:09,399 INFO L149 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be41c75b-8843-4b24-9742-0d657c72db73/bin/uautomizer-verify-aQ6SnzHsRB/witness.yml [2024-11-28 03:17:09,399 INFO L131 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2024-11-28 03:17:09,403 INFO L158 Benchmark]: Toolchain (without parser) took 86207.37ms. Allocated memory was 117.4MB in the beginning and 385.9MB in the end (delta: 268.4MB). Free memory was 95.5MB in the beginning and 318.5MB in the end (delta: -223.0MB). Peak memory consumption was 38.8MB. Max. memory is 16.1GB. [2024-11-28 03:17:09,404 INFO L158 Benchmark]: CDTParser took 1.46ms. Allocated memory is still 142.6MB. Free memory is still 80.3MB. There was no memory consumed. Max. memory is 16.1GB. [2024-11-28 03:17:09,404 INFO L158 Benchmark]: CACSL2BoogieTranslator took 238.45ms. Allocated memory is still 117.4MB. Free memory was 95.5MB in the beginning and 84.8MB in the end (delta: 10.6MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2024-11-28 03:17:09,404 INFO L158 Benchmark]: Boogie Procedure Inliner took 31.58ms. Allocated memory is still 117.4MB. Free memory was 84.8MB in the beginning and 83.9MB in the end (delta: 923.8kB). There was no memory consumed. Max. memory is 16.1GB. [2024-11-28 03:17:09,404 INFO L158 Benchmark]: Boogie Preprocessor took 37.83ms. Allocated memory is still 117.4MB. Free memory was 83.9MB in the beginning and 82.7MB in the end (delta: 1.2MB). There was no memory consumed. Max. memory is 16.1GB. [2024-11-28 03:17:09,405 INFO L158 Benchmark]: RCFGBuilder took 266.39ms. Allocated memory is still 117.4MB. Free memory was 82.7MB in the beginning and 73.4MB in the end (delta: 9.3MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2024-11-28 03:17:09,405 INFO L158 Benchmark]: TraceAbstraction took 85462.85ms. Allocated memory was 117.4MB in the beginning and 385.9MB in the end (delta: 268.4MB). Free memory was 72.8MB in the beginning and 326.8MB in the end (delta: -254.1MB). Peak memory consumption was 13.6MB. Max. memory is 16.1GB. [2024-11-28 03:17:09,405 INFO L158 Benchmark]: Witness Printer took 160.71ms. Allocated memory is still 385.9MB. Free memory was 326.8MB in the beginning and 318.5MB in the end (delta: 8.4MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2024-11-28 03:17:09,410 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 1.46ms. Allocated memory is still 142.6MB. Free memory is still 80.3MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 238.45ms. Allocated memory is still 117.4MB. Free memory was 95.5MB in the beginning and 84.8MB in the end (delta: 10.6MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 31.58ms. Allocated memory is still 117.4MB. Free memory was 84.8MB in the beginning and 83.9MB in the end (delta: 923.8kB). There was no memory consumed. Max. memory is 16.1GB. * Boogie Preprocessor took 37.83ms. Allocated memory is still 117.4MB. Free memory was 83.9MB in the beginning and 82.7MB in the end (delta: 1.2MB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 266.39ms. Allocated memory is still 117.4MB. Free memory was 82.7MB in the beginning and 73.4MB in the end (delta: 9.3MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * TraceAbstraction took 85462.85ms. Allocated memory was 117.4MB in the beginning and 385.9MB in the end (delta: 268.4MB). Free memory was 72.8MB in the beginning and 326.8MB in the end (delta: -254.1MB). Peak memory consumption was 13.6MB. Max. memory is 16.1GB. * Witness Printer took 160.71ms. Allocated memory is still 385.9MB. Free memory was 326.8MB in the beginning and 318.5MB in the end (delta: 8.4MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - CounterExampleResult [Line: 18]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L14] int a = 15; [L15] int b = 0; VAL [a=15, b=0] [L16] CALL, EXPR sum(a, b) VAL [\old(m)=0, \old(n)=15] [L6] COND FALSE !(n <= 0) VAL [\old(m)=0, \old(n)=15, m=0, n=15] [L9] CALL, EXPR sum(n - 1, m + 1) VAL [\old(m)=1, \old(n)=14] [L6] COND FALSE !(n <= 0) VAL [\old(m)=1, \old(n)=14, m=1, n=14] [L9] CALL, EXPR sum(n - 1, m + 1) VAL [\old(m)=2, \old(n)=13] [L6] COND FALSE !(n <= 0) VAL [\old(m)=2, \old(n)=13, m=2, n=13] [L9] CALL, EXPR sum(n - 1, m + 1) VAL [\old(m)=3, \old(n)=12] [L6] COND FALSE !(n <= 0) VAL [\old(m)=3, \old(n)=12, m=3, n=12] [L9] CALL, EXPR sum(n - 1, m + 1) VAL [\old(m)=4, \old(n)=11] [L6] COND FALSE !(n <= 0) VAL [\old(m)=4, \old(n)=11, m=4, n=11] [L9] CALL, EXPR sum(n - 1, m + 1) VAL [\old(m)=5, \old(n)=10] [L6] COND FALSE !(n <= 0) VAL [\old(m)=5, \old(n)=10, m=5, n=10] [L9] CALL, EXPR sum(n - 1, m + 1) VAL [\old(m)=6, \old(n)=9] [L6] COND FALSE !(n <= 0) VAL [\old(m)=6, \old(n)=9, m=6, n=9] [L9] CALL, EXPR sum(n - 1, m + 1) VAL [\old(m)=7, \old(n)=8] [L6] COND FALSE !(n <= 0) VAL [\old(m)=7, \old(n)=8, m=7, n=8] [L9] CALL, EXPR sum(n - 1, m + 1) VAL [\old(m)=8, \old(n)=7] [L6] COND FALSE !(n <= 0) VAL [\old(m)=8, \old(n)=7, m=8, n=7] [L9] CALL, EXPR sum(n - 1, m + 1) VAL [\old(m)=9, \old(n)=6] [L6] COND FALSE !(n <= 0) VAL [\old(m)=9, \old(n)=6, m=9, n=6] [L9] CALL, EXPR sum(n - 1, m + 1) VAL [\old(m)=10, \old(n)=5] [L6] COND FALSE !(n <= 0) VAL [\old(m)=10, \old(n)=5, m=10, n=5] [L9] CALL, EXPR sum(n - 1, m + 1) VAL [\old(m)=11, \old(n)=4] [L6] COND FALSE !(n <= 0) VAL [\old(m)=11, \old(n)=4, m=11, n=4] [L9] CALL, EXPR sum(n - 1, m + 1) VAL [\old(m)=12, \old(n)=3] [L6] COND FALSE !(n <= 0) VAL [\old(m)=12, \old(n)=3, m=12, n=3] [L9] CALL, EXPR sum(n - 1, m + 1) VAL [\old(m)=13, \old(n)=2] [L6] COND FALSE !(n <= 0) VAL [\old(m)=13, \old(n)=2, m=13, n=2] [L9] CALL, EXPR sum(n - 1, m + 1) VAL [\old(m)=14, \old(n)=1] [L6] COND FALSE !(n <= 0) VAL [\old(m)=14, \old(n)=1, m=14, n=1] [L9] CALL, EXPR sum(n - 1, m + 1) VAL [\old(m)=15, \old(n)=0] [L6] COND TRUE n <= 0 [L7] return m + n; VAL [\old(m)=15, \old(n)=0, \result=15] [L9] RET, EXPR sum(n - 1, m + 1) VAL [\old(m)=14, \old(n)=1, m=14, n=1] [L9] return sum(n - 1, m + 1); [L9] RET, EXPR sum(n - 1, m + 1) VAL [\old(m)=13, \old(n)=2, m=13, n=2] [L9] return sum(n - 1, m + 1); [L9] RET, EXPR sum(n - 1, m + 1) VAL [\old(m)=12, \old(n)=3, m=12, n=3] [L9] return sum(n - 1, m + 1); [L9] RET, EXPR sum(n - 1, m + 1) VAL [\old(m)=11, \old(n)=4, m=11, n=4] [L9] return sum(n - 1, m + 1); [L9] RET, EXPR sum(n - 1, m + 1) VAL [\old(m)=10, \old(n)=5, m=10, n=5] [L9] return sum(n - 1, m + 1); [L9] RET, EXPR sum(n - 1, m + 1) VAL [\old(m)=9, \old(n)=6, m=9, n=6] [L9] return sum(n - 1, m + 1); [L9] RET, EXPR sum(n - 1, m + 1) VAL [\old(m)=8, \old(n)=7, m=8, n=7] [L9] return sum(n - 1, m + 1); [L9] RET, EXPR sum(n - 1, m + 1) VAL [\old(m)=7, \old(n)=8, m=7, n=8] [L9] return sum(n - 1, m + 1); [L9] RET, EXPR sum(n - 1, m + 1) VAL [\old(m)=6, \old(n)=9, m=6, n=9] [L9] return sum(n - 1, m + 1); [L9] RET, EXPR sum(n - 1, m + 1) VAL [\old(m)=5, \old(n)=10, m=5, n=10] [L9] return sum(n - 1, m + 1); [L9] RET, EXPR sum(n - 1, m + 1) VAL [\old(m)=4, \old(n)=11, m=4, n=11] [L9] return sum(n - 1, m + 1); [L9] RET, EXPR sum(n - 1, m + 1) VAL [\old(m)=3, \old(n)=12, m=3, n=12] [L9] return sum(n - 1, m + 1); [L9] RET, EXPR sum(n - 1, m + 1) VAL [\old(m)=2, \old(n)=13, m=2, n=13] [L9] return sum(n - 1, m + 1); [L9] RET, EXPR sum(n - 1, m + 1) VAL [\old(m)=1, \old(n)=14, m=1, n=14] [L9] return sum(n - 1, m + 1); [L9] RET, EXPR sum(n - 1, m + 1) VAL [\old(m)=0, \old(n)=15, m=0, n=15] [L9] return sum(n - 1, m + 1); [L16] RET, EXPR sum(a, b) VAL [a=15, b=0] [L16] int result = sum(a, b); [L17] COND TRUE result == a + b [L18] reach_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 16 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 85.3s, OverallIterations: 16, TraceHistogramMax: 16, PathProgramHistogramMax: 15, EmptinessCheckTime: 0.0s, AutomataDifference: 3.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 782 SdHoareTripleChecker+Valid, 1.2s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 670 mSDsluCounter, 1172 SdHoareTripleChecker+Invalid, 1.0s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 1021 mSDsCounter, 283 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 1098 IncrementalHoareTripleChecker+Invalid, 1381 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 283 mSolverCounterUnsat, 151 mSDtfsCounter, 1098 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 1921 GetRequests, 1373 SyntacticMatches, 126 SemanticMatches, 422 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3924 ImplicationChecksByTransitivity, 6.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=57occurred in iteration=15, InterpolantAutomatonStates: 186, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 15 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.7s SatisfiabilityAnalysisTime, 75.5s InterpolantComputationTime, 1650 NumberOfCodeBlocks, 1650 NumberOfCodeBlocksAsserted, 147 NumberOfCheckSat, 2277 ConstructedInterpolants, 0 QuantifiedInterpolants, 6825 SizeOfPredicates, 105 NumberOfNonLiveVariables, 2562 ConjunctsInSsa, 266 ConjunctsInUnsatCore, 43 InterpolantComputations, 1 PerfectInterpolantSequences, 3653/9450 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available, ConComCheckerStatistics: No data available RESULT: Ultimate proved your program to be incorrect! [2024-11-28 03:17:09,444 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be41c75b-8843-4b24-9742-0d657c72db73/bin/uautomizer-verify-aQ6SnzHsRB/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE