./Ultimate.py --spec ../../sv-benchmarks/c/properties/no-overflow.prp --file ../../sv-benchmarks/c/recursive/Ackermann03.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for overflows Using default analysis Version 826ab2ba Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0294d2b0-f4e3-4885-8197-bcb4dda18fa6/bin/uautomizer-verify-qhAvR1uOyd/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0294d2b0-f4e3-4885-8197-bcb4dda18fa6/bin/uautomizer-verify-qhAvR1uOyd/plugins/org.eclipse.equinox.launcher_1.6.800.v20240513-1750.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0294d2b0-f4e3-4885-8197-bcb4dda18fa6/bin/uautomizer-verify-qhAvR1uOyd/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0294d2b0-f4e3-4885-8197-bcb4dda18fa6/bin/uautomizer-verify-qhAvR1uOyd/config/AutomizerReach.xml -i ../../sv-benchmarks/c/recursive/Ackermann03.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0294d2b0-f4e3-4885-8197-bcb4dda18fa6/bin/uautomizer-verify-qhAvR1uOyd/config/svcomp-Overflow-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0294d2b0-f4e3-4885-8197-bcb4dda18fa6/bin/uautomizer-verify-qhAvR1uOyd --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! overflow) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash c244f72db2906c596b7f122d769fc1464836d7d05d9227ee4269773d59ed10bd --- Real Ultimate output --- This is Ultimate 0.3.0-dev-826ab2b [2024-11-13 12:44:59,268 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-13 12:44:59,341 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0294d2b0-f4e3-4885-8197-bcb4dda18fa6/bin/uautomizer-verify-qhAvR1uOyd/config/svcomp-Overflow-32bit-Automizer_Default.epf [2024-11-13 12:44:59,351 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-13 12:44:59,351 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-13 12:44:59,393 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-13 12:44:59,393 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-13 12:44:59,394 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-13 12:44:59,394 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-13 12:44:59,394 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-13 12:44:59,394 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-13 12:44:59,394 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-13 12:44:59,395 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-13 12:44:59,395 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-13 12:44:59,395 INFO L153 SettingsManager]: * Use SBE=true [2024-11-13 12:44:59,395 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-13 12:44:59,395 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-13 12:44:59,395 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-13 12:44:59,395 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-13 12:44:59,395 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-13 12:44:59,396 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-13 12:44:59,396 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-13 12:44:59,396 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-13 12:44:59,396 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-13 12:44:59,396 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-13 12:44:59,396 INFO L153 SettingsManager]: * Check absence of signed integer overflows=ASSERTandASSUME [2024-11-13 12:44:59,396 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-11-13 12:44:59,398 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-13 12:44:59,398 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-13 12:44:59,398 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-13 12:44:59,399 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-13 12:44:59,399 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-13 12:44:59,399 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-13 12:44:59,399 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-13 12:44:59,399 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-13 12:44:59,400 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-13 12:44:59,400 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-13 12:44:59,400 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-13 12:44:59,400 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-13 12:44:59,400 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-13 12:44:59,400 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-13 12:44:59,400 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-13 12:44:59,400 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-13 12:44:59,400 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-13 12:44:59,401 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_0294d2b0-f4e3-4885-8197-bcb4dda18fa6/bin/uautomizer-verify-qhAvR1uOyd 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 ! overflow) ) 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 -> c244f72db2906c596b7f122d769fc1464836d7d05d9227ee4269773d59ed10bd [2024-11-13 12:44:59,729 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-13 12:44:59,738 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-13 12:44:59,741 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-13 12:44:59,743 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-13 12:44:59,743 INFO L274 PluginConnector]: CDTParser initialized [2024-11-13 12:44:59,746 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0294d2b0-f4e3-4885-8197-bcb4dda18fa6/bin/uautomizer-verify-qhAvR1uOyd/../../sv-benchmarks/c/recursive/Ackermann03.c Unable to find full path for "g++" [2024-11-13 12:45:01,701 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-13 12:45:01,915 INFO L384 CDTParser]: Found 1 translation units. [2024-11-13 12:45:01,917 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0294d2b0-f4e3-4885-8197-bcb4dda18fa6/sv-benchmarks/c/recursive/Ackermann03.c [2024-11-13 12:45:01,929 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0294d2b0-f4e3-4885-8197-bcb4dda18fa6/bin/uautomizer-verify-qhAvR1uOyd/data/0f3ace775/85f2225524ab4c4a941f49df0ed347b0/FLAG98d086ae4 [2024-11-13 12:45:02,255 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0294d2b0-f4e3-4885-8197-bcb4dda18fa6/bin/uautomizer-verify-qhAvR1uOyd/data/0f3ace775/85f2225524ab4c4a941f49df0ed347b0 [2024-11-13 12:45:02,258 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-13 12:45:02,259 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-13 12:45:02,261 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-13 12:45:02,261 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-13 12:45:02,266 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-13 12:45:02,267 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.11 12:45:02" (1/1) ... [2024-11-13 12:45:02,268 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@74a8e9d9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 12:45:02, skipping insertion in model container [2024-11-13 12:45:02,269 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.11 12:45:02" (1/1) ... [2024-11-13 12:45:02,286 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-13 12:45:02,468 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-13 12:45:02,481 INFO L200 MainTranslator]: Completed pre-run [2024-11-13 12:45:02,499 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-13 12:45:02,515 INFO L204 MainTranslator]: Completed translation [2024-11-13 12:45:02,516 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 12:45:02 WrapperNode [2024-11-13 12:45:02,516 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-13 12:45:02,518 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-13 12:45:02,518 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-13 12:45:02,519 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-13 12:45:02,526 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 12:45:02" (1/1) ... [2024-11-13 12:45:02,532 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 12:45:02" (1/1) ... [2024-11-13 12:45:02,551 INFO L138 Inliner]: procedures = 13, calls = 12, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 34 [2024-11-13 12:45:02,552 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-13 12:45:02,554 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-13 12:45:02,554 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-13 12:45:02,554 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-13 12:45:02,562 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 12:45:02" (1/1) ... [2024-11-13 12:45:02,563 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 12:45:02" (1/1) ... [2024-11-13 12:45:02,565 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 12:45:02" (1/1) ... [2024-11-13 12:45:02,582 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]. [2024-11-13 12:45:02,583 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 12:45:02" (1/1) ... [2024-11-13 12:45:02,584 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 12:45:02" (1/1) ... [2024-11-13 12:45:02,589 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 12:45:02" (1/1) ... [2024-11-13 12:45:02,591 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 12:45:02" (1/1) ... [2024-11-13 12:45:02,596 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 12:45:02" (1/1) ... [2024-11-13 12:45:02,597 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 12:45:02" (1/1) ... [2024-11-13 12:45:02,598 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-13 12:45:02,602 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-13 12:45:02,602 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-13 12:45:02,602 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-13 12:45:02,603 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 12:45:02" (1/1) ... [2024-11-13 12:45:02,617 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-13 12:45:02,631 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0294d2b0-f4e3-4885-8197-bcb4dda18fa6/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 12:45:02,645 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0294d2b0-f4e3-4885-8197-bcb4dda18fa6/bin/uautomizer-verify-qhAvR1uOyd/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-11-13 12:45:02,651 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0294d2b0-f4e3-4885-8197-bcb4dda18fa6/bin/uautomizer-verify-qhAvR1uOyd/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-11-13 12:45:02,681 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-13 12:45:02,681 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-13 12:45:02,683 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-13 12:45:02,683 INFO L130 BoogieDeclarations]: Found specification of procedure ackermann [2024-11-13 12:45:02,683 INFO L138 BoogieDeclarations]: Found implementation of procedure ackermann [2024-11-13 12:45:02,683 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-13 12:45:02,756 INFO L238 CfgBuilder]: Building ICFG [2024-11-13 12:45:02,758 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-13 12:45:02,913 INFO L? ?]: Removed 21 outVars from TransFormulas that were not future-live. [2024-11-13 12:45:02,913 INFO L287 CfgBuilder]: Performing block encoding [2024-11-13 12:45:02,924 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-13 12:45:02,924 INFO L316 CfgBuilder]: Removed 0 assume(true) statements. [2024-11-13 12:45:02,925 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.11 12:45:02 BoogieIcfgContainer [2024-11-13 12:45:02,925 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-13 12:45:02,927 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-13 12:45:02,928 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-13 12:45:02,933 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-13 12:45:02,933 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.11 12:45:02" (1/3) ... [2024-11-13 12:45:02,934 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@60d90649 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.11 12:45:02, skipping insertion in model container [2024-11-13 12:45:02,934 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 12:45:02" (2/3) ... [2024-11-13 12:45:02,934 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@60d90649 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.11 12:45:02, skipping insertion in model container [2024-11-13 12:45:02,934 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.11 12:45:02" (3/3) ... [2024-11-13 12:45:02,936 INFO L112 eAbstractionObserver]: Analyzing ICFG Ackermann03.c [2024-11-13 12:45:02,953 INFO L217 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-13 12:45:02,954 INFO L154 ceAbstractionStarter]: Applying trace abstraction to ICFG Ackermann03.c that has 2 procedures, 39 locations, 1 initial locations, 0 loop locations, and 8 error locations. [2024-11-13 12:45:03,014 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-13 12:45:03,028 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;@17177004, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-13 12:45:03,028 INFO L334 AbstractCegarLoop]: Starting to check reachability of 8 error locations. [2024-11-13 12:45:03,033 INFO L276 IsEmpty]: Start isEmpty. Operand has 39 states, 25 states have (on average 1.52) internal successors, (38), 33 states have internal predecessors, (38), 4 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2024-11-13 12:45:03,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2024-11-13 12:45:03,040 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 12:45:03,040 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 12:45:03,041 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2024-11-13 12:45:03,046 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 12:45:03,046 INFO L85 PathProgramCache]: Analyzing trace with hash 180823785, now seen corresponding path program 1 times [2024-11-13 12:45:03,054 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 12:45:03,055 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1223267095] [2024-11-13 12:45:03,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 12:45:03,056 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 12:45:03,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 12:45:03,346 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 12:45:03,347 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 12:45:03,347 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1223267095] [2024-11-13 12:45:03,348 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1223267095] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 12:45:03,348 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-13 12:45:03,348 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-13 12:45:03,350 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [563642519] [2024-11-13 12:45:03,350 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 12:45:03,354 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-13 12:45:03,355 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 12:45:03,375 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-13 12:45:03,375 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-13 12:45:03,378 INFO L87 Difference]: Start difference. First operand has 39 states, 25 states have (on average 1.52) internal successors, (38), 33 states have internal predecessors, (38), 4 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Second operand has 5 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 4 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 12:45:03,599 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 12:45:03,600 INFO L93 Difference]: Finished difference Result 71 states and 83 transitions. [2024-11-13 12:45:03,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-13 12:45:03,605 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 4 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2024-11-13 12:45:03,605 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 12:45:03,614 INFO L225 Difference]: With dead ends: 71 [2024-11-13 12:45:03,614 INFO L226 Difference]: Without dead ends: 59 [2024-11-13 12:45:03,620 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-11-13 12:45:03,626 INFO L432 NwaCegarLoop]: 33 mSDtfsCounter, 36 mSDsluCounter, 86 mSDsCounter, 0 mSdLazyCounter, 70 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 119 SdHoareTripleChecker+Invalid, 77 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 70 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-13 12:45:03,627 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [38 Valid, 119 Invalid, 77 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 70 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-13 12:45:03,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2024-11-13 12:45:03,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 51. [2024-11-13 12:45:03,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 34 states have (on average 1.5294117647058822) internal successors, (52), 42 states have internal predecessors, (52), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2024-11-13 12:45:03,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 65 transitions. [2024-11-13 12:45:03,691 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 65 transitions. Word has length 8 [2024-11-13 12:45:03,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 12:45:03,692 INFO L471 AbstractCegarLoop]: Abstraction has 51 states and 65 transitions. [2024-11-13 12:45:03,692 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 4 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 12:45:03,692 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 65 transitions. [2024-11-13 12:45:03,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2024-11-13 12:45:03,693 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 12:45:03,693 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 12:45:03,693 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-13 12:45:03,694 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2024-11-13 12:45:03,694 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 12:45:03,694 INFO L85 PathProgramCache]: Analyzing trace with hash 1310575100, now seen corresponding path program 1 times [2024-11-13 12:45:03,694 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 12:45:03,695 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [947441078] [2024-11-13 12:45:03,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 12:45:03,695 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 12:45:03,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 12:45:03,799 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 12:45:03,800 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 12:45:03,800 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [947441078] [2024-11-13 12:45:03,800 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [947441078] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 12:45:03,800 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-13 12:45:03,800 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-13 12:45:03,801 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [531243606] [2024-11-13 12:45:03,801 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 12:45:03,802 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-13 12:45:03,802 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 12:45:03,803 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-13 12:45:03,803 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-13 12:45:03,803 INFO L87 Difference]: Start difference. First operand 51 states and 65 transitions. Second operand has 5 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 12:45:03,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 12:45:03,970 INFO L93 Difference]: Finished difference Result 101 states and 129 transitions. [2024-11-13 12:45:03,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-13 12:45:03,973 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2024-11-13 12:45:03,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 12:45:03,974 INFO L225 Difference]: With dead ends: 101 [2024-11-13 12:45:03,974 INFO L226 Difference]: Without dead ends: 93 [2024-11-13 12:45:03,975 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-11-13 12:45:03,976 INFO L432 NwaCegarLoop]: 29 mSDtfsCounter, 36 mSDsluCounter, 76 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 105 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-13 12:45:03,976 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [36 Valid, 105 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-13 12:45:03,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2024-11-13 12:45:04,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 85. [2024-11-13 12:45:04,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 61 states have (on average 1.5081967213114753) internal successors, (92), 70 states have internal predecessors, (92), 13 states have call successors, (13), 4 states have call predecessors, (13), 3 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2024-11-13 12:45:04,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 115 transitions. [2024-11-13 12:45:04,007 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 115 transitions. Word has length 9 [2024-11-13 12:45:04,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 12:45:04,007 INFO L471 AbstractCegarLoop]: Abstraction has 85 states and 115 transitions. [2024-11-13 12:45:04,007 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 12:45:04,007 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 115 transitions. [2024-11-13 12:45:04,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2024-11-13 12:45:04,008 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 12:45:04,008 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 12:45:04,008 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-13 12:45:04,008 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2024-11-13 12:45:04,013 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 12:45:04,013 INFO L85 PathProgramCache]: Analyzing trace with hash 1310570103, now seen corresponding path program 1 times [2024-11-13 12:45:04,013 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 12:45:04,013 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1662906891] [2024-11-13 12:45:04,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 12:45:04,014 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 12:45:04,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 12:45:04,090 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 12:45:04,090 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 12:45:04,090 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1662906891] [2024-11-13 12:45:04,090 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1662906891] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 12:45:04,090 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-13 12:45:04,090 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-13 12:45:04,091 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [210950803] [2024-11-13 12:45:04,091 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 12:45:04,091 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-13 12:45:04,091 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 12:45:04,091 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-13 12:45:04,092 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-13 12:45:04,092 INFO L87 Difference]: Start difference. First operand 85 states and 115 transitions. Second operand has 5 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 12:45:04,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 12:45:04,233 INFO L93 Difference]: Finished difference Result 118 states and 157 transitions. [2024-11-13 12:45:04,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-13 12:45:04,234 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2024-11-13 12:45:04,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 12:45:04,237 INFO L225 Difference]: With dead ends: 118 [2024-11-13 12:45:04,237 INFO L226 Difference]: Without dead ends: 114 [2024-11-13 12:45:04,240 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-11-13 12:45:04,241 INFO L432 NwaCegarLoop]: 26 mSDtfsCounter, 34 mSDsluCounter, 71 mSDsCounter, 0 mSdLazyCounter, 52 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 97 SdHoareTripleChecker+Invalid, 60 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 52 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-13 12:45:04,241 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [35 Valid, 97 Invalid, 60 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 52 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-13 12:45:04,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2024-11-13 12:45:04,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 102. [2024-11-13 12:45:04,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 74 states have (on average 1.445945945945946) internal successors, (107), 83 states have internal predecessors, (107), 16 states have call successors, (16), 5 states have call predecessors, (16), 4 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2024-11-13 12:45:04,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 136 transitions. [2024-11-13 12:45:04,280 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 136 transitions. Word has length 9 [2024-11-13 12:45:04,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 12:45:04,280 INFO L471 AbstractCegarLoop]: Abstraction has 102 states and 136 transitions. [2024-11-13 12:45:04,280 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 12:45:04,281 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 136 transitions. [2024-11-13 12:45:04,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2024-11-13 12:45:04,282 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 12:45:04,283 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 12:45:04,283 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-11-13 12:45:04,283 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ackermannErr3ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2024-11-13 12:45:04,284 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 12:45:04,284 INFO L85 PathProgramCache]: Analyzing trace with hash 1973122508, now seen corresponding path program 1 times [2024-11-13 12:45:04,285 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 12:45:04,285 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [343242682] [2024-11-13 12:45:04,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 12:45:04,285 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 12:45:04,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 12:45:04,392 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 12:45:04,392 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 12:45:04,393 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [343242682] [2024-11-13 12:45:04,393 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [343242682] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 12:45:04,393 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-13 12:45:04,393 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-13 12:45:04,393 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [89612556] [2024-11-13 12:45:04,393 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 12:45:04,394 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-13 12:45:04,394 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 12:45:04,394 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-13 12:45:04,394 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-13 12:45:04,395 INFO L87 Difference]: Start difference. First operand 102 states and 136 transitions. Second operand has 5 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 12:45:04,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 12:45:04,498 INFO L93 Difference]: Finished difference Result 110 states and 153 transitions. [2024-11-13 12:45:04,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-13 12:45:04,499 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2024-11-13 12:45:04,499 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 12:45:04,501 INFO L225 Difference]: With dead ends: 110 [2024-11-13 12:45:04,503 INFO L226 Difference]: Without dead ends: 108 [2024-11-13 12:45:04,503 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-11-13 12:45:04,504 INFO L432 NwaCegarLoop]: 23 mSDtfsCounter, 35 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 50 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-13 12:45:04,504 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [35 Valid, 54 Invalid, 50 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-13 12:45:04,505 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2024-11-13 12:45:04,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 100. [2024-11-13 12:45:04,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 74 states have (on average 1.3108108108108107) internal successors, (97), 81 states have internal predecessors, (97), 16 states have call successors, (16), 5 states have call predecessors, (16), 4 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2024-11-13 12:45:04,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 126 transitions. [2024-11-13 12:45:04,525 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 126 transitions. Word has length 10 [2024-11-13 12:45:04,526 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 12:45:04,526 INFO L471 AbstractCegarLoop]: Abstraction has 100 states and 126 transitions. [2024-11-13 12:45:04,526 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 12:45:04,526 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 126 transitions. [2024-11-13 12:45:04,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2024-11-13 12:45:04,527 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 12:45:04,527 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 12:45:04,527 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-11-13 12:45:04,527 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2024-11-13 12:45:04,528 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 12:45:04,528 INFO L85 PathProgramCache]: Analyzing trace with hash -612398535, now seen corresponding path program 1 times [2024-11-13 12:45:04,528 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 12:45:04,528 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [740888323] [2024-11-13 12:45:04,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 12:45:04,529 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 12:45:04,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 12:45:04,617 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 12:45:04,618 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 12:45:04,618 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [740888323] [2024-11-13 12:45:04,618 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [740888323] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 12:45:04,618 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-13 12:45:04,618 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-13 12:45:04,618 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1493168092] [2024-11-13 12:45:04,619 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 12:45:04,619 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-13 12:45:04,619 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 12:45:04,619 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-13 12:45:04,620 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-13 12:45:04,620 INFO L87 Difference]: Start difference. First operand 100 states and 126 transitions. Second operand has 4 states, 4 states have (on average 3.25) internal successors, (13), 3 states have internal predecessors, (13), 1 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 12:45:04,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 12:45:04,697 INFO L93 Difference]: Finished difference Result 170 states and 225 transitions. [2024-11-13 12:45:04,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-13 12:45:04,698 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 3 states have internal predecessors, (13), 1 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2024-11-13 12:45:04,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 12:45:04,700 INFO L225 Difference]: With dead ends: 170 [2024-11-13 12:45:04,700 INFO L226 Difference]: Without dead ends: 99 [2024-11-13 12:45:04,701 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2024-11-13 12:45:04,702 INFO L432 NwaCegarLoop]: 39 mSDtfsCounter, 25 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 89 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-13 12:45:04,702 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 89 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-13 12:45:04,703 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2024-11-13 12:45:04,715 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 96. [2024-11-13 12:45:04,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 71 states have (on average 1.295774647887324) internal successors, (92), 78 states have internal predecessors, (92), 15 states have call successors, (15), 5 states have call predecessors, (15), 4 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2024-11-13 12:45:04,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 119 transitions. [2024-11-13 12:45:04,717 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 119 transitions. Word has length 15 [2024-11-13 12:45:04,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 12:45:04,718 INFO L471 AbstractCegarLoop]: Abstraction has 96 states and 119 transitions. [2024-11-13 12:45:04,718 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 3 states have internal predecessors, (13), 1 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 12:45:04,718 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 119 transitions. [2024-11-13 12:45:04,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2024-11-13 12:45:04,719 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 12:45:04,719 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 12:45:04,719 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-11-13 12:45:04,719 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ackermannErr4ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2024-11-13 12:45:04,719 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 12:45:04,719 INFO L85 PathProgramCache]: Analyzing trace with hash -612398311, now seen corresponding path program 1 times [2024-11-13 12:45:04,719 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 12:45:04,720 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [89346829] [2024-11-13 12:45:04,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 12:45:04,720 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 12:45:04,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 12:45:04,805 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 12:45:04,806 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 12:45:04,806 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [89346829] [2024-11-13 12:45:04,806 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [89346829] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 12:45:04,806 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [598544274] [2024-11-13 12:45:04,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 12:45:04,807 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 12:45:04,807 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0294d2b0-f4e3-4885-8197-bcb4dda18fa6/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 12:45:04,809 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0294d2b0-f4e3-4885-8197-bcb4dda18fa6/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 12:45:04,812 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0294d2b0-f4e3-4885-8197-bcb4dda18fa6/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-13 12:45:04,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 12:45:04,861 INFO L255 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-13 12:45:04,865 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 12:45:04,932 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 12:45:04,932 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 12:45:05,048 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 12:45:05,048 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [598544274] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 12:45:05,048 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 12:45:05,048 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 11 [2024-11-13 12:45:05,048 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [672767394] [2024-11-13 12:45:05,048 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 12:45:05,049 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-11-13 12:45:05,049 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 12:45:05,049 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-11-13 12:45:05,053 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2024-11-13 12:45:05,053 INFO L87 Difference]: Start difference. First operand 96 states and 119 transitions. Second operand has 12 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 8 states have internal predecessors, (24), 4 states have call successors, (4), 4 states have call predecessors, (4), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 12:45:05,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 12:45:05,498 INFO L93 Difference]: Finished difference Result 276 states and 359 transitions. [2024-11-13 12:45:05,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-11-13 12:45:05,502 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 8 states have internal predecessors, (24), 4 states have call successors, (4), 4 states have call predecessors, (4), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2024-11-13 12:45:05,502 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 12:45:05,505 INFO L225 Difference]: With dead ends: 276 [2024-11-13 12:45:05,505 INFO L226 Difference]: Without dead ends: 274 [2024-11-13 12:45:05,509 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=68, Invalid=172, Unknown=0, NotChecked=0, Total=240 [2024-11-13 12:45:05,510 INFO L432 NwaCegarLoop]: 31 mSDtfsCounter, 215 mSDsluCounter, 175 mSDsCounter, 0 mSdLazyCounter, 166 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 218 SdHoareTripleChecker+Valid, 206 SdHoareTripleChecker+Invalid, 222 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 166 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-13 12:45:05,510 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [218 Valid, 206 Invalid, 222 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 166 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-13 12:45:05,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 274 states. [2024-11-13 12:45:05,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 274 to 236. [2024-11-13 12:45:05,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 236 states, 182 states have (on average 1.2637362637362637) internal successors, (230), 189 states have internal predecessors, (230), 36 states have call successors, (36), 13 states have call predecessors, (36), 12 states have return successors, (33), 33 states have call predecessors, (33), 33 states have call successors, (33) [2024-11-13 12:45:05,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 236 states to 236 states and 299 transitions. [2024-11-13 12:45:05,576 INFO L78 Accepts]: Start accepts. Automaton has 236 states and 299 transitions. Word has length 15 [2024-11-13 12:45:05,576 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 12:45:05,576 INFO L471 AbstractCegarLoop]: Abstraction has 236 states and 299 transitions. [2024-11-13 12:45:05,577 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 8 states have internal predecessors, (24), 4 states have call successors, (4), 4 states have call predecessors, (4), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 12:45:05,577 INFO L276 IsEmpty]: Start isEmpty. Operand 236 states and 299 transitions. [2024-11-13 12:45:05,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2024-11-13 12:45:05,577 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 12:45:05,578 INFO L215 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 12:45:05,598 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0294d2b0-f4e3-4885-8197-bcb4dda18fa6/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-13 12:45:05,782 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0294d2b0-f4e3-4885-8197-bcb4dda18fa6/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2024-11-13 12:45:05,782 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2024-11-13 12:45:05,782 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 12:45:05,782 INFO L85 PathProgramCache]: Analyzing trace with hash -600892461, now seen corresponding path program 1 times [2024-11-13 12:45:05,783 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 12:45:05,783 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [634967773] [2024-11-13 12:45:05,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 12:45:05,783 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 12:45:05,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 12:45:05,879 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 12:45:05,880 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 12:45:05,880 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [634967773] [2024-11-13 12:45:05,880 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [634967773] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 12:45:05,880 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [471703445] [2024-11-13 12:45:05,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 12:45:05,880 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 12:45:05,881 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0294d2b0-f4e3-4885-8197-bcb4dda18fa6/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 12:45:05,883 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0294d2b0-f4e3-4885-8197-bcb4dda18fa6/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 12:45:05,886 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0294d2b0-f4e3-4885-8197-bcb4dda18fa6/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-13 12:45:05,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 12:45:05,932 INFO L255 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-13 12:45:05,933 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 12:45:05,973 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 12:45:05,974 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 12:45:06,083 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 12:45:06,083 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [471703445] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 12:45:06,083 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 12:45:06,083 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 11 [2024-11-13 12:45:06,083 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [619469966] [2024-11-13 12:45:06,083 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 12:45:06,084 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-11-13 12:45:06,084 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 12:45:06,084 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-11-13 12:45:06,084 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2024-11-13 12:45:06,085 INFO L87 Difference]: Start difference. First operand 236 states and 299 transitions. Second operand has 12 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 8 states have internal predecessors, (25), 4 states have call successors, (4), 4 states have call predecessors, (4), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 12:45:06,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 12:45:06,490 INFO L93 Difference]: Finished difference Result 498 states and 669 transitions. [2024-11-13 12:45:06,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-11-13 12:45:06,491 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 8 states have internal predecessors, (25), 4 states have call successors, (4), 4 states have call predecessors, (4), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2024-11-13 12:45:06,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 12:45:06,495 INFO L225 Difference]: With dead ends: 498 [2024-11-13 12:45:06,495 INFO L226 Difference]: Without dead ends: 496 [2024-11-13 12:45:06,496 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=77, Invalid=195, Unknown=0, NotChecked=0, Total=272 [2024-11-13 12:45:06,497 INFO L432 NwaCegarLoop]: 23 mSDtfsCounter, 142 mSDsluCounter, 139 mSDsCounter, 0 mSdLazyCounter, 171 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 147 SdHoareTripleChecker+Valid, 162 SdHoareTripleChecker+Invalid, 209 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 171 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-13 12:45:06,497 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [147 Valid, 162 Invalid, 209 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 171 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-13 12:45:06,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 496 states. [2024-11-13 12:45:06,568 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 496 to 445. [2024-11-13 12:45:06,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 445 states, 347 states have (on average 1.2276657060518732) internal successors, (426), 354 states have internal predecessors, (426), 69 states have call successors, (69), 24 states have call predecessors, (69), 23 states have return successors, (66), 66 states have call predecessors, (66), 66 states have call successors, (66) [2024-11-13 12:45:06,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 445 states to 445 states and 561 transitions. [2024-11-13 12:45:06,575 INFO L78 Accepts]: Start accepts. Automaton has 445 states and 561 transitions. Word has length 16 [2024-11-13 12:45:06,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 12:45:06,575 INFO L471 AbstractCegarLoop]: Abstraction has 445 states and 561 transitions. [2024-11-13 12:45:06,575 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 8 states have internal predecessors, (25), 4 states have call successors, (4), 4 states have call predecessors, (4), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 12:45:06,575 INFO L276 IsEmpty]: Start isEmpty. Operand 445 states and 561 transitions. [2024-11-13 12:45:06,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2024-11-13 12:45:06,576 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 12:45:06,576 INFO L215 NwaCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 12:45:06,597 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0294d2b0-f4e3-4885-8197-bcb4dda18fa6/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-11-13 12:45:06,777 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0294d2b0-f4e3-4885-8197-bcb4dda18fa6/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2024-11-13 12:45:06,777 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2024-11-13 12:45:06,778 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 12:45:06,778 INFO L85 PathProgramCache]: Analyzing trace with hash 1979487198, now seen corresponding path program 1 times [2024-11-13 12:45:06,778 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 12:45:06,778 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1831856958] [2024-11-13 12:45:06,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 12:45:06,778 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 12:45:06,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 12:45:06,924 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2024-11-13 12:45:06,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 12:45:06,978 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-13 12:45:06,978 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 12:45:06,978 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1831856958] [2024-11-13 12:45:06,979 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1831856958] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 12:45:06,979 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2068791302] [2024-11-13 12:45:06,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 12:45:06,979 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 12:45:06,979 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0294d2b0-f4e3-4885-8197-bcb4dda18fa6/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 12:45:06,981 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0294d2b0-f4e3-4885-8197-bcb4dda18fa6/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 12:45:06,983 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0294d2b0-f4e3-4885-8197-bcb4dda18fa6/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-13 12:45:07,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 12:45:07,032 INFO L255 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-13 12:45:07,033 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 12:45:07,135 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-13 12:45:07,135 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-13 12:45:07,136 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2068791302] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 12:45:07,136 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-13 12:45:07,136 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [7] total 12 [2024-11-13 12:45:07,136 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [52649717] [2024-11-13 12:45:07,136 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 12:45:07,137 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-13 12:45:07,137 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 12:45:07,138 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-13 12:45:07,138 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2024-11-13 12:45:07,138 INFO L87 Difference]: Start difference. First operand 445 states and 561 transitions. Second operand has 7 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 6 states have internal predecessors, (19), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-11-13 12:45:07,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 12:45:07,419 INFO L93 Difference]: Finished difference Result 494 states and 650 transitions. [2024-11-13 12:45:07,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-11-13 12:45:07,420 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 6 states have internal predecessors, (19), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 24 [2024-11-13 12:45:07,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 12:45:07,424 INFO L225 Difference]: With dead ends: 494 [2024-11-13 12:45:07,424 INFO L226 Difference]: Without dead ends: 493 [2024-11-13 12:45:07,425 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=64, Invalid=278, Unknown=0, NotChecked=0, Total=342 [2024-11-13 12:45:07,426 INFO L432 NwaCegarLoop]: 38 mSDtfsCounter, 45 mSDsluCounter, 101 mSDsCounter, 0 mSdLazyCounter, 89 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 139 SdHoareTripleChecker+Invalid, 104 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 89 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-13 12:45:07,426 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [47 Valid, 139 Invalid, 104 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 89 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-13 12:45:07,427 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 493 states. [2024-11-13 12:45:07,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 493 to 444. [2024-11-13 12:45:07,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 444 states, 347 states have (on average 1.2161383285302594) internal successors, (422), 353 states have internal predecessors, (422), 69 states have call successors, (69), 24 states have call predecessors, (69), 23 states have return successors, (66), 66 states have call predecessors, (66), 66 states have call successors, (66) [2024-11-13 12:45:07,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 444 states to 444 states and 557 transitions. [2024-11-13 12:45:07,493 INFO L78 Accepts]: Start accepts. Automaton has 444 states and 557 transitions. Word has length 24 [2024-11-13 12:45:07,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 12:45:07,494 INFO L471 AbstractCegarLoop]: Abstraction has 444 states and 557 transitions. [2024-11-13 12:45:07,494 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 6 states have internal predecessors, (19), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-11-13 12:45:07,494 INFO L276 IsEmpty]: Start isEmpty. Operand 444 states and 557 transitions. [2024-11-13 12:45:07,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2024-11-13 12:45:07,495 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 12:45:07,496 INFO L215 NwaCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 12:45:07,515 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0294d2b0-f4e3-4885-8197-bcb4dda18fa6/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-11-13 12:45:07,700 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0294d2b0-f4e3-4885-8197-bcb4dda18fa6/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 12:45:07,700 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2024-11-13 12:45:07,700 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 12:45:07,700 INFO L85 PathProgramCache]: Analyzing trace with hash 1234561058, now seen corresponding path program 1 times [2024-11-13 12:45:07,700 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 12:45:07,700 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1963572756] [2024-11-13 12:45:07,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 12:45:07,701 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 12:45:07,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 12:45:07,839 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2024-11-13 12:45:07,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 12:45:07,886 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-13 12:45:07,886 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 12:45:07,886 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1963572756] [2024-11-13 12:45:07,886 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1963572756] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 12:45:07,887 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [34800680] [2024-11-13 12:45:07,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 12:45:07,887 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 12:45:07,888 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0294d2b0-f4e3-4885-8197-bcb4dda18fa6/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 12:45:07,889 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0294d2b0-f4e3-4885-8197-bcb4dda18fa6/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 12:45:07,892 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0294d2b0-f4e3-4885-8197-bcb4dda18fa6/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-13 12:45:07,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 12:45:07,945 INFO L255 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-11-13 12:45:07,949 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 12:45:08,026 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-13 12:45:08,026 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 12:45:08,262 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-13 12:45:08,263 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [34800680] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 12:45:08,264 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 12:45:08,264 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 14 [2024-11-13 12:45:08,264 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [892669952] [2024-11-13 12:45:08,265 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 12:45:08,265 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-11-13 12:45:08,265 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 12:45:08,266 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-11-13 12:45:08,266 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=174, Unknown=0, NotChecked=0, Total=210 [2024-11-13 12:45:08,266 INFO L87 Difference]: Start difference. First operand 444 states and 557 transitions. Second operand has 15 states, 12 states have (on average 3.4166666666666665) internal successors, (41), 13 states have internal predecessors, (41), 6 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-13 12:45:08,830 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 12:45:08,830 INFO L93 Difference]: Finished difference Result 807 states and 1179 transitions. [2024-11-13 12:45:08,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-11-13 12:45:08,831 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 12 states have (on average 3.4166666666666665) internal successors, (41), 13 states have internal predecessors, (41), 6 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 25 [2024-11-13 12:45:08,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 12:45:08,837 INFO L225 Difference]: With dead ends: 807 [2024-11-13 12:45:08,837 INFO L226 Difference]: Without dead ends: 805 [2024-11-13 12:45:08,838 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 44 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=138, Invalid=512, Unknown=0, NotChecked=0, Total=650 [2024-11-13 12:45:08,839 INFO L432 NwaCegarLoop]: 20 mSDtfsCounter, 123 mSDsluCounter, 157 mSDsCounter, 0 mSdLazyCounter, 229 mSolverCounterSat, 83 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 132 SdHoareTripleChecker+Valid, 177 SdHoareTripleChecker+Invalid, 312 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 83 IncrementalHoareTripleChecker+Valid, 229 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-13 12:45:08,839 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [132 Valid, 177 Invalid, 312 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [83 Valid, 229 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-13 12:45:08,840 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 805 states. [2024-11-13 12:45:08,937 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 805 to 641. [2024-11-13 12:45:08,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 641 states, 477 states have (on average 1.2033542976939204) internal successors, (574), 505 states have internal predecessors, (574), 107 states have call successors, (107), 31 states have call predecessors, (107), 52 states have return successors, (194), 104 states have call predecessors, (194), 103 states have call successors, (194) [2024-11-13 12:45:08,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 641 states to 641 states and 875 transitions. [2024-11-13 12:45:08,947 INFO L78 Accepts]: Start accepts. Automaton has 641 states and 875 transitions. Word has length 25 [2024-11-13 12:45:08,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 12:45:08,947 INFO L471 AbstractCegarLoop]: Abstraction has 641 states and 875 transitions. [2024-11-13 12:45:08,947 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 12 states have (on average 3.4166666666666665) internal successors, (41), 13 states have internal predecessors, (41), 6 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-13 12:45:08,947 INFO L276 IsEmpty]: Start isEmpty. Operand 641 states and 875 transitions. [2024-11-13 12:45:08,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2024-11-13 12:45:08,948 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 12:45:08,949 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2024-11-13 12:45:08,969 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0294d2b0-f4e3-4885-8197-bcb4dda18fa6/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-11-13 12:45:09,153 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0294d2b0-f4e3-4885-8197-bcb4dda18fa6/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 12:45:09,153 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ackermannErr6ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2024-11-13 12:45:09,153 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 12:45:09,153 INFO L85 PathProgramCache]: Analyzing trace with hash -2137182870, now seen corresponding path program 1 times [2024-11-13 12:45:09,153 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 12:45:09,153 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [442086095] [2024-11-13 12:45:09,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 12:45:09,154 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 12:45:09,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 12:45:09,277 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 12:45:09,278 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 12:45:09,278 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [442086095] [2024-11-13 12:45:09,278 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [442086095] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 12:45:09,278 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1567700314] [2024-11-13 12:45:09,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 12:45:09,278 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 12:45:09,278 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0294d2b0-f4e3-4885-8197-bcb4dda18fa6/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 12:45:09,281 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0294d2b0-f4e3-4885-8197-bcb4dda18fa6/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 12:45:09,283 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0294d2b0-f4e3-4885-8197-bcb4dda18fa6/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-13 12:45:09,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 12:45:09,331 INFO L255 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-13 12:45:09,332 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 12:45:09,394 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 12:45:09,394 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 12:45:09,544 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 12:45:09,544 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1567700314] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 12:45:09,544 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 12:45:09,544 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 15 [2024-11-13 12:45:09,545 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1462887658] [2024-11-13 12:45:09,545 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 12:45:09,545 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-11-13 12:45:09,545 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 12:45:09,545 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-11-13 12:45:09,546 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2024-11-13 12:45:09,546 INFO L87 Difference]: Start difference. First operand 641 states and 875 transitions. Second operand has 16 states, 13 states have (on average 3.4615384615384617) internal successors, (45), 10 states have internal predecessors, (45), 6 states have call successors, (6), 6 states have call predecessors, (6), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 12:45:10,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 12:45:10,055 INFO L93 Difference]: Finished difference Result 997 states and 1430 transitions. [2024-11-13 12:45:10,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-11-13 12:45:10,055 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 13 states have (on average 3.4615384615384617) internal successors, (45), 10 states have internal predecessors, (45), 6 states have call successors, (6), 6 states have call predecessors, (6), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2024-11-13 12:45:10,056 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 12:45:10,065 INFO L225 Difference]: With dead ends: 997 [2024-11-13 12:45:10,065 INFO L226 Difference]: Without dead ends: 996 [2024-11-13 12:45:10,066 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=129, Invalid=333, Unknown=0, NotChecked=0, Total=462 [2024-11-13 12:45:10,067 INFO L432 NwaCegarLoop]: 25 mSDtfsCounter, 184 mSDsluCounter, 267 mSDsCounter, 0 mSdLazyCounter, 241 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 191 SdHoareTripleChecker+Valid, 292 SdHoareTripleChecker+Invalid, 281 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 241 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-13 12:45:10,068 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [191 Valid, 292 Invalid, 281 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 241 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-13 12:45:10,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 996 states. [2024-11-13 12:45:10,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 996 to 917. [2024-11-13 12:45:10,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 917 states, 681 states have (on average 1.171806167400881) internal successors, (798), 721 states have internal predecessors, (798), 155 states have call successors, (155), 43 states have call predecessors, (155), 76 states have return successors, (278), 152 states have call predecessors, (278), 151 states have call successors, (278) [2024-11-13 12:45:10,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 917 states to 917 states and 1231 transitions. [2024-11-13 12:45:10,245 INFO L78 Accepts]: Start accepts. Automaton has 917 states and 1231 transitions. Word has length 27 [2024-11-13 12:45:10,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 12:45:10,246 INFO L471 AbstractCegarLoop]: Abstraction has 917 states and 1231 transitions. [2024-11-13 12:45:10,246 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 13 states have (on average 3.4615384615384617) internal successors, (45), 10 states have internal predecessors, (45), 6 states have call successors, (6), 6 states have call predecessors, (6), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 12:45:10,246 INFO L276 IsEmpty]: Start isEmpty. Operand 917 states and 1231 transitions. [2024-11-13 12:45:10,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2024-11-13 12:45:10,247 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 12:45:10,248 INFO L215 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 12:45:10,271 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0294d2b0-f4e3-4885-8197-bcb4dda18fa6/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2024-11-13 12:45:10,455 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0294d2b0-f4e3-4885-8197-bcb4dda18fa6/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2024-11-13 12:45:10,455 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ackermannErr6ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2024-11-13 12:45:10,456 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 12:45:10,456 INFO L85 PathProgramCache]: Analyzing trace with hash 1007222953, now seen corresponding path program 1 times [2024-11-13 12:45:10,456 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 12:45:10,456 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1121592476] [2024-11-13 12:45:10,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 12:45:10,457 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 12:45:10,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 12:45:10,563 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2024-11-13 12:45:10,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 12:45:10,606 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-13 12:45:10,607 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 12:45:10,607 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1121592476] [2024-11-13 12:45:10,607 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1121592476] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 12:45:10,607 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1384923814] [2024-11-13 12:45:10,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 12:45:10,607 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 12:45:10,607 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0294d2b0-f4e3-4885-8197-bcb4dda18fa6/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 12:45:10,609 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0294d2b0-f4e3-4885-8197-bcb4dda18fa6/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 12:45:10,612 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0294d2b0-f4e3-4885-8197-bcb4dda18fa6/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-13 12:45:10,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 12:45:10,660 INFO L255 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-11-13 12:45:10,662 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 12:45:10,738 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-13 12:45:10,738 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 12:45:10,952 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-13 12:45:10,952 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1384923814] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 12:45:10,953 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 12:45:10,953 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 14 [2024-11-13 12:45:10,954 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1524109804] [2024-11-13 12:45:10,954 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 12:45:10,954 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-11-13 12:45:10,954 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 12:45:10,955 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-11-13 12:45:10,957 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2024-11-13 12:45:10,957 INFO L87 Difference]: Start difference. First operand 917 states and 1231 transitions. Second operand has 15 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 13 states have internal predecessors, (37), 6 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-13 12:45:11,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 12:45:11,495 INFO L93 Difference]: Finished difference Result 1478 states and 2205 transitions. [2024-11-13 12:45:11,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-11-13 12:45:11,496 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 13 states have internal predecessors, (37), 6 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 27 [2024-11-13 12:45:11,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 12:45:11,509 INFO L225 Difference]: With dead ends: 1478 [2024-11-13 12:45:11,509 INFO L226 Difference]: Without dead ends: 1473 [2024-11-13 12:45:11,510 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 48 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=115, Invalid=391, Unknown=0, NotChecked=0, Total=506 [2024-11-13 12:45:11,511 INFO L432 NwaCegarLoop]: 20 mSDtfsCounter, 85 mSDsluCounter, 143 mSDsCounter, 0 mSdLazyCounter, 227 mSolverCounterSat, 68 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 87 SdHoareTripleChecker+Valid, 163 SdHoareTripleChecker+Invalid, 295 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 68 IncrementalHoareTripleChecker+Valid, 227 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-13 12:45:11,511 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [87 Valid, 163 Invalid, 295 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [68 Valid, 227 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-13 12:45:11,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1473 states. [2024-11-13 12:45:11,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1473 to 1080. [2024-11-13 12:45:11,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1080 states, 804 states have (on average 1.1703980099502487) internal successors, (941), 853 states have internal predecessors, (941), 175 states have call successors, (175), 53 states have call predecessors, (175), 96 states have return successors, (415), 173 states have call predecessors, (415), 170 states have call successors, (415) [2024-11-13 12:45:11,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1080 states to 1080 states and 1531 transitions. [2024-11-13 12:45:11,700 INFO L78 Accepts]: Start accepts. Automaton has 1080 states and 1531 transitions. Word has length 27 [2024-11-13 12:45:11,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 12:45:11,701 INFO L471 AbstractCegarLoop]: Abstraction has 1080 states and 1531 transitions. [2024-11-13 12:45:11,701 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 13 states have internal predecessors, (37), 6 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-13 12:45:11,702 INFO L276 IsEmpty]: Start isEmpty. Operand 1080 states and 1531 transitions. [2024-11-13 12:45:11,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2024-11-13 12:45:11,703 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 12:45:11,703 INFO L215 NwaCegarLoop]: trace histogram [4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 12:45:11,727 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0294d2b0-f4e3-4885-8197-bcb4dda18fa6/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-11-13 12:45:11,904 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0294d2b0-f4e3-4885-8197-bcb4dda18fa6/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2024-11-13 12:45:11,904 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2024-11-13 12:45:11,905 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 12:45:11,905 INFO L85 PathProgramCache]: Analyzing trace with hash 1878013265, now seen corresponding path program 1 times [2024-11-13 12:45:11,905 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 12:45:11,905 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1644309873] [2024-11-13 12:45:11,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 12:45:11,905 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 12:45:11,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 12:45:12,009 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2024-11-13 12:45:12,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 12:45:12,047 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-11-13 12:45:12,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 12:45:12,094 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 3 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-13 12:45:12,095 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 12:45:12,096 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1644309873] [2024-11-13 12:45:12,096 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1644309873] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 12:45:12,096 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [799664930] [2024-11-13 12:45:12,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 12:45:12,097 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 12:45:12,097 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0294d2b0-f4e3-4885-8197-bcb4dda18fa6/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 12:45:12,099 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0294d2b0-f4e3-4885-8197-bcb4dda18fa6/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 12:45:12,101 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0294d2b0-f4e3-4885-8197-bcb4dda18fa6/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-13 12:45:12,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 12:45:12,157 INFO L255 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-11-13 12:45:12,159 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 12:45:12,213 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 7 proven. 5 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-13 12:45:12,213 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 12:45:12,475 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 3 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-13 12:45:12,475 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [799664930] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 12:45:12,475 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 12:45:12,476 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 17 [2024-11-13 12:45:12,476 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [25521523] [2024-11-13 12:45:12,476 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 12:45:12,476 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-11-13 12:45:12,476 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 12:45:12,478 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-11-13 12:45:12,479 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2024-11-13 12:45:12,479 INFO L87 Difference]: Start difference. First operand 1080 states and 1531 transitions. Second operand has 18 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 14 states have internal predecessors, (43), 3 states have call successors, (5), 3 states have call predecessors, (5), 5 states have return successors, (5), 4 states have call predecessors, (5), 1 states have call successors, (5) [2024-11-13 12:45:13,236 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 12:45:13,236 INFO L93 Difference]: Finished difference Result 1883 states and 3145 transitions. [2024-11-13 12:45:13,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-11-13 12:45:13,237 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 14 states have internal predecessors, (43), 3 states have call successors, (5), 3 states have call predecessors, (5), 5 states have return successors, (5), 4 states have call predecessors, (5), 1 states have call successors, (5) Word has length 34 [2024-11-13 12:45:13,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 12:45:13,250 INFO L225 Difference]: With dead ends: 1883 [2024-11-13 12:45:13,251 INFO L226 Difference]: Without dead ends: 1869 [2024-11-13 12:45:13,252 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=140, Invalid=672, Unknown=0, NotChecked=0, Total=812 [2024-11-13 12:45:13,253 INFO L432 NwaCegarLoop]: 27 mSDtfsCounter, 108 mSDsluCounter, 152 mSDsCounter, 0 mSdLazyCounter, 275 mSolverCounterSat, 126 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 108 SdHoareTripleChecker+Valid, 179 SdHoareTripleChecker+Invalid, 401 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 126 IncrementalHoareTripleChecker+Valid, 275 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-13 12:45:13,253 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [108 Valid, 179 Invalid, 401 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [126 Valid, 275 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-13 12:45:13,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1869 states. [2024-11-13 12:45:13,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1869 to 1577. [2024-11-13 12:45:13,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1577 states, 1149 states have (on average 1.162750217580505) internal successors, (1336), 1210 states have internal predecessors, (1336), 271 states have call successors, (271), 73 states have call predecessors, (271), 152 states have return successors, (774), 293 states have call predecessors, (774), 263 states have call successors, (774) [2024-11-13 12:45:13,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1577 states to 1577 states and 2381 transitions. [2024-11-13 12:45:13,578 INFO L78 Accepts]: Start accepts. Automaton has 1577 states and 2381 transitions. Word has length 34 [2024-11-13 12:45:13,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 12:45:13,579 INFO L471 AbstractCegarLoop]: Abstraction has 1577 states and 2381 transitions. [2024-11-13 12:45:13,579 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 14 states have internal predecessors, (43), 3 states have call successors, (5), 3 states have call predecessors, (5), 5 states have return successors, (5), 4 states have call predecessors, (5), 1 states have call successors, (5) [2024-11-13 12:45:13,579 INFO L276 IsEmpty]: Start isEmpty. Operand 1577 states and 2381 transitions. [2024-11-13 12:45:13,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2024-11-13 12:45:13,581 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 12:45:13,581 INFO L215 NwaCegarLoop]: trace histogram [4, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 12:45:13,602 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0294d2b0-f4e3-4885-8197-bcb4dda18fa6/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-11-13 12:45:13,782 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0294d2b0-f4e3-4885-8197-bcb4dda18fa6/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2024-11-13 12:45:13,782 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ackermannErr6ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2024-11-13 12:45:13,782 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 12:45:13,782 INFO L85 PathProgramCache]: Analyzing trace with hash 889503256, now seen corresponding path program 1 times [2024-11-13 12:45:13,783 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 12:45:13,783 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1448399312] [2024-11-13 12:45:13,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 12:45:13,783 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 12:45:13,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 12:45:13,868 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2024-11-13 12:45:13,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 12:45:13,940 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-11-13 12:45:13,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 12:45:13,991 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 14 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-13 12:45:13,991 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 12:45:13,992 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1448399312] [2024-11-13 12:45:13,992 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1448399312] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 12:45:13,992 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [22795884] [2024-11-13 12:45:13,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 12:45:13,992 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 12:45:13,992 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0294d2b0-f4e3-4885-8197-bcb4dda18fa6/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 12:45:13,994 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0294d2b0-f4e3-4885-8197-bcb4dda18fa6/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 12:45:13,998 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0294d2b0-f4e3-4885-8197-bcb4dda18fa6/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-13 12:45:14,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 12:45:14,051 INFO L255 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-11-13 12:45:14,052 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 12:45:14,104 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 12 proven. 3 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-13 12:45:14,105 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 12:45:14,353 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-13 12:45:14,353 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [22795884] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-13 12:45:14,354 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-13 12:45:14,354 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [8, 8] total 17 [2024-11-13 12:45:14,354 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [397107368] [2024-11-13 12:45:14,354 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 12:45:14,354 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-11-13 12:45:14,355 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 12:45:14,355 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-11-13 12:45:14,355 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2024-11-13 12:45:14,356 INFO L87 Difference]: Start difference. First operand 1577 states and 2381 transitions. Second operand has 9 states, 8 states have (on average 3.5) internal successors, (28), 7 states have internal predecessors, (28), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-13 12:45:14,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 12:45:14,856 INFO L93 Difference]: Finished difference Result 1784 states and 2841 transitions. [2024-11-13 12:45:14,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-11-13 12:45:14,856 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 3.5) internal successors, (28), 7 states have internal predecessors, (28), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 36 [2024-11-13 12:45:14,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 12:45:14,872 INFO L225 Difference]: With dead ends: 1784 [2024-11-13 12:45:14,872 INFO L226 Difference]: Without dead ends: 1783 [2024-11-13 12:45:14,873 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=75, Invalid=431, Unknown=0, NotChecked=0, Total=506 [2024-11-13 12:45:14,875 INFO L432 NwaCegarLoop]: 37 mSDtfsCounter, 36 mSDsluCounter, 169 mSDsCounter, 0 mSdLazyCounter, 217 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 206 SdHoareTripleChecker+Invalid, 235 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 217 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-13 12:45:14,875 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [44 Valid, 206 Invalid, 235 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 217 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-13 12:45:14,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1783 states. [2024-11-13 12:45:15,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1783 to 1614. [2024-11-13 12:45:15,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1614 states, 1173 states have (on average 1.1568627450980393) internal successors, (1357), 1231 states have internal predecessors, (1357), 287 states have call successors, (287), 73 states have call predecessors, (287), 149 states have return successors, (703), 309 states have call predecessors, (703), 279 states have call successors, (703) [2024-11-13 12:45:15,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1614 states to 1614 states and 2347 transitions. [2024-11-13 12:45:15,124 INFO L78 Accepts]: Start accepts. Automaton has 1614 states and 2347 transitions. Word has length 36 [2024-11-13 12:45:15,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 12:45:15,125 INFO L471 AbstractCegarLoop]: Abstraction has 1614 states and 2347 transitions. [2024-11-13 12:45:15,125 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 3.5) internal successors, (28), 7 states have internal predecessors, (28), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-13 12:45:15,125 INFO L276 IsEmpty]: Start isEmpty. Operand 1614 states and 2347 transitions. [2024-11-13 12:45:15,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2024-11-13 12:45:15,127 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 12:45:15,127 INFO L215 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 12:45:15,149 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0294d2b0-f4e3-4885-8197-bcb4dda18fa6/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-11-13 12:45:15,333 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0294d2b0-f4e3-4885-8197-bcb4dda18fa6/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2024-11-13 12:45:15,334 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ackermannErr6ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2024-11-13 12:45:15,334 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 12:45:15,334 INFO L85 PathProgramCache]: Analyzing trace with hash 791091541, now seen corresponding path program 2 times [2024-11-13 12:45:15,334 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 12:45:15,334 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1949611284] [2024-11-13 12:45:15,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 12:45:15,335 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 12:45:15,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 12:45:15,500 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2024-11-13 12:45:15,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 12:45:15,538 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 2 proven. 40 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-13 12:45:15,539 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 12:45:15,539 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1949611284] [2024-11-13 12:45:15,539 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1949611284] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 12:45:15,539 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [373897040] [2024-11-13 12:45:15,539 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-13 12:45:15,539 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 12:45:15,539 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0294d2b0-f4e3-4885-8197-bcb4dda18fa6/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 12:45:15,541 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0294d2b0-f4e3-4885-8197-bcb4dda18fa6/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 12:45:15,543 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0294d2b0-f4e3-4885-8197-bcb4dda18fa6/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-11-13 12:45:15,598 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-13 12:45:15,599 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-13 12:45:15,600 INFO L255 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-11-13 12:45:15,602 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 12:45:15,699 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 2 proven. 40 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-13 12:45:15,699 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 12:45:15,981 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 4 proven. 38 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-13 12:45:15,982 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [373897040] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 12:45:15,982 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 12:45:15,982 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 22 [2024-11-13 12:45:15,982 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [235446026] [2024-11-13 12:45:15,982 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 12:45:15,983 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-11-13 12:45:15,983 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 12:45:15,983 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-11-13 12:45:15,984 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=421, Unknown=0, NotChecked=0, Total=506 [2024-11-13 12:45:15,984 INFO L87 Difference]: Start difference. First operand 1614 states and 2347 transitions. Second operand has 23 states, 20 states have (on average 3.05) internal successors, (61), 17 states have internal predecessors, (61), 8 states have call successors, (10), 7 states have call predecessors, (10), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-13 12:45:17,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 12:45:17,292 INFO L93 Difference]: Finished difference Result 3197 states and 5554 transitions. [2024-11-13 12:45:17,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2024-11-13 12:45:17,293 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 20 states have (on average 3.05) internal successors, (61), 17 states have internal predecessors, (61), 8 states have call successors, (10), 7 states have call predecessors, (10), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 43 [2024-11-13 12:45:17,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 12:45:17,316 INFO L225 Difference]: With dead ends: 3197 [2024-11-13 12:45:17,317 INFO L226 Difference]: Without dead ends: 3196 [2024-11-13 12:45:17,319 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 424 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=491, Invalid=1765, Unknown=0, NotChecked=0, Total=2256 [2024-11-13 12:45:17,320 INFO L432 NwaCegarLoop]: 20 mSDtfsCounter, 380 mSDsluCounter, 174 mSDsCounter, 0 mSdLazyCounter, 307 mSolverCounterSat, 253 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 382 SdHoareTripleChecker+Valid, 194 SdHoareTripleChecker+Invalid, 560 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 253 IncrementalHoareTripleChecker+Valid, 307 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-13 12:45:17,320 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [382 Valid, 194 Invalid, 560 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [253 Valid, 307 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-11-13 12:45:17,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3196 states. [2024-11-13 12:45:17,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3196 to 2201. [2024-11-13 12:45:17,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2201 states, 1612 states have (on average 1.1557071960297767) internal successors, (1863), 1689 states have internal predecessors, (1863), 372 states have call successors, (372), 107 states have call predecessors, (372), 212 states have return successors, (1147), 404 states have call predecessors, (1147), 364 states have call successors, (1147) [2024-11-13 12:45:17,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2201 states to 2201 states and 3382 transitions. [2024-11-13 12:45:17,732 INFO L78 Accepts]: Start accepts. Automaton has 2201 states and 3382 transitions. Word has length 43 [2024-11-13 12:45:17,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 12:45:17,732 INFO L471 AbstractCegarLoop]: Abstraction has 2201 states and 3382 transitions. [2024-11-13 12:45:17,732 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 20 states have (on average 3.05) internal successors, (61), 17 states have internal predecessors, (61), 8 states have call successors, (10), 7 states have call predecessors, (10), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-13 12:45:17,732 INFO L276 IsEmpty]: Start isEmpty. Operand 2201 states and 3382 transitions. [2024-11-13 12:45:17,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2024-11-13 12:45:17,734 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 12:45:17,734 INFO L215 NwaCegarLoop]: trace histogram [5, 4, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 12:45:17,753 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0294d2b0-f4e3-4885-8197-bcb4dda18fa6/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2024-11-13 12:45:17,937 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0294d2b0-f4e3-4885-8197-bcb4dda18fa6/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2024-11-13 12:45:17,940 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ackermannErr6ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2024-11-13 12:45:17,940 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 12:45:17,941 INFO L85 PathProgramCache]: Analyzing trace with hash -328093970, now seen corresponding path program 2 times [2024-11-13 12:45:17,942 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 12:45:17,942 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [884552170] [2024-11-13 12:45:17,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 12:45:17,942 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 12:45:17,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 12:45:18,066 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2024-11-13 12:45:18,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 12:45:18,102 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-11-13 12:45:18,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 12:45:18,146 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 26 proven. 8 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-13 12:45:18,147 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 12:45:18,147 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [884552170] [2024-11-13 12:45:18,147 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [884552170] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 12:45:18,147 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [906563133] [2024-11-13 12:45:18,147 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-13 12:45:18,147 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 12:45:18,147 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0294d2b0-f4e3-4885-8197-bcb4dda18fa6/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 12:45:18,149 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0294d2b0-f4e3-4885-8197-bcb4dda18fa6/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 12:45:18,151 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0294d2b0-f4e3-4885-8197-bcb4dda18fa6/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-11-13 12:45:18,204 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-13 12:45:18,204 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-13 12:45:18,205 INFO L255 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 11 conjuncts are in the unsatisfiable core [2024-11-13 12:45:18,206 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 12:45:18,271 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 24 proven. 10 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-13 12:45:18,271 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 12:45:18,582 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 28 proven. 6 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-13 12:45:18,582 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [906563133] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 12:45:18,582 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 12:45:18,582 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 21 [2024-11-13 12:45:18,583 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1234115390] [2024-11-13 12:45:18,583 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 12:45:18,583 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-11-13 12:45:18,583 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 12:45:18,584 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-11-13 12:45:18,584 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=394, Unknown=0, NotChecked=0, Total=462 [2024-11-13 12:45:18,585 INFO L87 Difference]: Start difference. First operand 2201 states and 3382 transitions. Second operand has 22 states, 21 states have (on average 2.9047619047619047) internal successors, (61), 16 states have internal predecessors, (61), 5 states have call successors, (7), 5 states have call predecessors, (7), 5 states have return successors, (5), 4 states have call predecessors, (5), 1 states have call successors, (5) [2024-11-13 12:45:20,277 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 12:45:20,277 INFO L93 Difference]: Finished difference Result 4455 states and 8209 transitions. [2024-11-13 12:45:20,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2024-11-13 12:45:20,278 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 2.9047619047619047) internal successors, (61), 16 states have internal predecessors, (61), 5 states have call successors, (7), 5 states have call predecessors, (7), 5 states have return successors, (5), 4 states have call predecessors, (5), 1 states have call successors, (5) Word has length 44 [2024-11-13 12:45:20,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 12:45:20,302 INFO L225 Difference]: With dead ends: 4455 [2024-11-13 12:45:20,303 INFO L226 Difference]: Without dead ends: 3140 [2024-11-13 12:45:20,341 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 86 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 498 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=501, Invalid=2049, Unknown=0, NotChecked=0, Total=2550 [2024-11-13 12:45:20,342 INFO L432 NwaCegarLoop]: 39 mSDtfsCounter, 178 mSDsluCounter, 299 mSDsCounter, 0 mSdLazyCounter, 579 mSolverCounterSat, 174 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 178 SdHoareTripleChecker+Valid, 338 SdHoareTripleChecker+Invalid, 753 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 174 IncrementalHoareTripleChecker+Valid, 579 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-11-13 12:45:20,342 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [178 Valid, 338 Invalid, 753 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [174 Valid, 579 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-11-13 12:45:20,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3140 states. [2024-11-13 12:45:20,763 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3140 to 2494. [2024-11-13 12:45:20,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2494 states, 1823 states have (on average 1.1492046077893583) internal successors, (2095), 1909 states have internal predecessors, (2095), 428 states have call successors, (428), 122 states have call predecessors, (428), 238 states have return successors, (1243), 462 states have call predecessors, (1243), 420 states have call successors, (1243) [2024-11-13 12:45:20,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2494 states to 2494 states and 3766 transitions. [2024-11-13 12:45:20,781 INFO L78 Accepts]: Start accepts. Automaton has 2494 states and 3766 transitions. Word has length 44 [2024-11-13 12:45:20,782 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 12:45:20,782 INFO L471 AbstractCegarLoop]: Abstraction has 2494 states and 3766 transitions. [2024-11-13 12:45:20,782 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 21 states have (on average 2.9047619047619047) internal successors, (61), 16 states have internal predecessors, (61), 5 states have call successors, (7), 5 states have call predecessors, (7), 5 states have return successors, (5), 4 states have call predecessors, (5), 1 states have call successors, (5) [2024-11-13 12:45:20,782 INFO L276 IsEmpty]: Start isEmpty. Operand 2494 states and 3766 transitions. [2024-11-13 12:45:20,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2024-11-13 12:45:20,784 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 12:45:20,784 INFO L215 NwaCegarLoop]: trace histogram [5, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 12:45:20,803 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0294d2b0-f4e3-4885-8197-bcb4dda18fa6/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2024-11-13 12:45:20,988 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0294d2b0-f4e3-4885-8197-bcb4dda18fa6/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2024-11-13 12:45:20,989 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2024-11-13 12:45:20,989 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 12:45:20,989 INFO L85 PathProgramCache]: Analyzing trace with hash 1781931564, now seen corresponding path program 1 times [2024-11-13 12:45:20,989 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 12:45:20,989 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1742016581] [2024-11-13 12:45:20,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 12:45:20,990 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 12:45:20,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 12:45:21,031 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2024-11-13 12:45:21,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 12:45:21,052 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2024-11-13 12:45:21,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 12:45:21,068 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2024-11-13 12:45:21,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 12:45:21,071 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 24 proven. 5 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2024-11-13 12:45:21,072 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 12:45:21,072 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1742016581] [2024-11-13 12:45:21,072 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1742016581] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 12:45:21,072 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2084727080] [2024-11-13 12:45:21,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 12:45:21,072 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 12:45:21,072 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0294d2b0-f4e3-4885-8197-bcb4dda18fa6/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 12:45:21,076 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0294d2b0-f4e3-4885-8197-bcb4dda18fa6/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 12:45:21,077 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0294d2b0-f4e3-4885-8197-bcb4dda18fa6/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-11-13 12:45:21,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 12:45:21,132 INFO L255 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-13 12:45:21,133 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 12:45:21,191 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 22 proven. 5 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2024-11-13 12:45:21,191 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 12:45:21,352 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 22 proven. 5 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2024-11-13 12:45:21,352 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2084727080] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 12:45:21,352 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 12:45:21,352 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 7, 7] total 12 [2024-11-13 12:45:21,352 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1517754482] [2024-11-13 12:45:21,352 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 12:45:21,353 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-11-13 12:45:21,353 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 12:45:21,353 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-11-13 12:45:21,353 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2024-11-13 12:45:21,353 INFO L87 Difference]: Start difference. First operand 2494 states and 3766 transitions. Second operand has 12 states, 12 states have (on average 4.0) internal successors, (48), 12 states have internal predecessors, (48), 4 states have call successors, (6), 2 states have call predecessors, (6), 5 states have return successors, (5), 2 states have call predecessors, (5), 4 states have call successors, (5) [2024-11-13 12:45:21,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 12:45:21,707 INFO L93 Difference]: Finished difference Result 3517 states and 5520 transitions. [2024-11-13 12:45:21,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-13 12:45:21,708 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.0) internal successors, (48), 12 states have internal predecessors, (48), 4 states have call successors, (6), 2 states have call predecessors, (6), 5 states have return successors, (5), 2 states have call predecessors, (5), 4 states have call successors, (5) Word has length 44 [2024-11-13 12:45:21,708 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 12:45:21,716 INFO L225 Difference]: With dead ends: 3517 [2024-11-13 12:45:21,716 INFO L226 Difference]: Without dead ends: 1211 [2024-11-13 12:45:21,731 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 86 SyntacticMatches, 3 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=60, Invalid=150, Unknown=0, NotChecked=0, Total=210 [2024-11-13 12:45:21,732 INFO L432 NwaCegarLoop]: 30 mSDtfsCounter, 71 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 116 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 107 SdHoareTripleChecker+Invalid, 150 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 116 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-13 12:45:21,732 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [71 Valid, 107 Invalid, 150 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 116 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-13 12:45:21,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1211 states. [2024-11-13 12:45:21,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1211 to 1182. [2024-11-13 12:45:21,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1182 states, 881 states have (on average 1.112372304199773) internal successors, (980), 905 states have internal predecessors, (980), 212 states have call successors, (212), 67 states have call predecessors, (212), 85 states have return successors, (333), 209 states have call predecessors, (333), 208 states have call successors, (333) [2024-11-13 12:45:21,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1182 states to 1182 states and 1525 transitions. [2024-11-13 12:45:21,913 INFO L78 Accepts]: Start accepts. Automaton has 1182 states and 1525 transitions. Word has length 44 [2024-11-13 12:45:21,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 12:45:21,913 INFO L471 AbstractCegarLoop]: Abstraction has 1182 states and 1525 transitions. [2024-11-13 12:45:21,913 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 4.0) internal successors, (48), 12 states have internal predecessors, (48), 4 states have call successors, (6), 2 states have call predecessors, (6), 5 states have return successors, (5), 2 states have call predecessors, (5), 4 states have call successors, (5) [2024-11-13 12:45:21,913 INFO L276 IsEmpty]: Start isEmpty. Operand 1182 states and 1525 transitions. [2024-11-13 12:45:21,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2024-11-13 12:45:21,915 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 12:45:21,915 INFO L215 NwaCegarLoop]: trace histogram [6, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 12:45:21,935 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0294d2b0-f4e3-4885-8197-bcb4dda18fa6/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2024-11-13 12:45:22,115 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0294d2b0-f4e3-4885-8197-bcb4dda18fa6/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2024-11-13 12:45:22,115 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2024-11-13 12:45:22,116 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 12:45:22,116 INFO L85 PathProgramCache]: Analyzing trace with hash -603852535, now seen corresponding path program 1 times [2024-11-13 12:45:22,116 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 12:45:22,116 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1756631404] [2024-11-13 12:45:22,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 12:45:22,116 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 12:45:22,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 12:45:22,216 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2024-11-13 12:45:22,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 12:45:22,279 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2024-11-13 12:45:22,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 12:45:22,316 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-11-13 12:45:22,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 12:45:22,361 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2024-11-13 12:45:22,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 12:45:22,434 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 21 proven. 16 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2024-11-13 12:45:22,435 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 12:45:22,435 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1756631404] [2024-11-13 12:45:22,435 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1756631404] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 12:45:22,435 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1469336338] [2024-11-13 12:45:22,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 12:45:22,435 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 12:45:22,435 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0294d2b0-f4e3-4885-8197-bcb4dda18fa6/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 12:45:22,437 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0294d2b0-f4e3-4885-8197-bcb4dda18fa6/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 12:45:22,440 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0294d2b0-f4e3-4885-8197-bcb4dda18fa6/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-11-13 12:45:22,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 12:45:22,496 INFO L255 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 15 conjuncts are in the unsatisfiable core [2024-11-13 12:45:22,498 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 12:45:22,552 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 14 proven. 18 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2024-11-13 12:45:22,552 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 12:45:23,204 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 18 proven. 19 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2024-11-13 12:45:23,205 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1469336338] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 12:45:23,205 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 12:45:23,205 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11, 13] total 26 [2024-11-13 12:45:23,205 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1389652297] [2024-11-13 12:45:23,205 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 12:45:23,206 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2024-11-13 12:45:23,206 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 12:45:23,206 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2024-11-13 12:45:23,207 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=614, Unknown=0, NotChecked=0, Total=702 [2024-11-13 12:45:23,207 INFO L87 Difference]: Start difference. First operand 1182 states and 1525 transitions. Second operand has 27 states, 26 states have (on average 2.230769230769231) internal successors, (58), 21 states have internal predecessors, (58), 5 states have call successors, (7), 3 states have call predecessors, (7), 8 states have return successors, (9), 8 states have call predecessors, (9), 3 states have call successors, (9) [2024-11-13 12:45:25,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 12:45:25,090 INFO L93 Difference]: Finished difference Result 3167 states and 5904 transitions. [2024-11-13 12:45:25,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2024-11-13 12:45:25,091 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 26 states have (on average 2.230769230769231) internal successors, (58), 21 states have internal predecessors, (58), 5 states have call successors, (7), 3 states have call predecessors, (7), 8 states have return successors, (9), 8 states have call predecessors, (9), 3 states have call successors, (9) Word has length 53 [2024-11-13 12:45:25,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 12:45:25,119 INFO L225 Difference]: With dead ends: 3167 [2024-11-13 12:45:25,119 INFO L226 Difference]: Without dead ends: 3161 [2024-11-13 12:45:25,124 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1686 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1079, Invalid=5083, Unknown=0, NotChecked=0, Total=6162 [2024-11-13 12:45:25,125 INFO L432 NwaCegarLoop]: 23 mSDtfsCounter, 141 mSDsluCounter, 232 mSDsCounter, 0 mSdLazyCounter, 507 mSolverCounterSat, 199 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 153 SdHoareTripleChecker+Valid, 255 SdHoareTripleChecker+Invalid, 706 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 199 IncrementalHoareTripleChecker+Valid, 507 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-11-13 12:45:25,126 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [153 Valid, 255 Invalid, 706 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [199 Valid, 507 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-11-13 12:45:25,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3161 states. [2024-11-13 12:45:25,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3161 to 2249. [2024-11-13 12:45:25,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2249 states, 1552 states have (on average 1.0869845360824741) internal successors, (1687), 1580 states have internal predecessors, (1687), 429 states have call successors, (429), 81 states have call predecessors, (429), 264 states have return successors, (2579), 587 states have call predecessors, (2579), 423 states have call successors, (2579) [2024-11-13 12:45:25,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2249 states to 2249 states and 4695 transitions. [2024-11-13 12:45:25,654 INFO L78 Accepts]: Start accepts. Automaton has 2249 states and 4695 transitions. Word has length 53 [2024-11-13 12:45:25,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 12:45:25,654 INFO L471 AbstractCegarLoop]: Abstraction has 2249 states and 4695 transitions. [2024-11-13 12:45:25,654 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 26 states have (on average 2.230769230769231) internal successors, (58), 21 states have internal predecessors, (58), 5 states have call successors, (7), 3 states have call predecessors, (7), 8 states have return successors, (9), 8 states have call predecessors, (9), 3 states have call successors, (9) [2024-11-13 12:45:25,654 INFO L276 IsEmpty]: Start isEmpty. Operand 2249 states and 4695 transitions. [2024-11-13 12:45:25,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2024-11-13 12:45:25,656 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 12:45:25,656 INFO L215 NwaCegarLoop]: trace histogram [8, 8, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1] [2024-11-13 12:45:25,676 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0294d2b0-f4e3-4885-8197-bcb4dda18fa6/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2024-11-13 12:45:25,860 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0294d2b0-f4e3-4885-8197-bcb4dda18fa6/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2024-11-13 12:45:25,861 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting ackermannErr4ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2024-11-13 12:45:25,862 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 12:45:25,862 INFO L85 PathProgramCache]: Analyzing trace with hash 38844242, now seen corresponding path program 1 times [2024-11-13 12:45:25,862 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 12:45:25,862 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [683072] [2024-11-13 12:45:25,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 12:45:25,862 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 12:45:25,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 12:45:26,096 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 111 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-13 12:45:26,096 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 12:45:26,097 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [683072] [2024-11-13 12:45:26,097 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [683072] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 12:45:26,097 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [625352729] [2024-11-13 12:45:26,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 12:45:26,097 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 12:45:26,097 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0294d2b0-f4e3-4885-8197-bcb4dda18fa6/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 12:45:26,099 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0294d2b0-f4e3-4885-8197-bcb4dda18fa6/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 12:45:26,102 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0294d2b0-f4e3-4885-8197-bcb4dda18fa6/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-11-13 12:45:26,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 12:45:26,171 INFO L255 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 18 conjuncts are in the unsatisfiable core [2024-11-13 12:45:26,172 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 12:45:26,270 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 111 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-13 12:45:26,270 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 12:45:26,497 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 111 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-13 12:45:26,497 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [625352729] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 12:45:26,497 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 12:45:26,497 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 23 [2024-11-13 12:45:26,497 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [605407463] [2024-11-13 12:45:26,497 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 12:45:26,498 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-11-13 12:45:26,498 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 12:45:26,498 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-11-13 12:45:26,498 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=416, Unknown=0, NotChecked=0, Total=552 [2024-11-13 12:45:26,498 INFO L87 Difference]: Start difference. First operand 2249 states and 4695 transitions. Second operand has 24 states, 23 states have (on average 3.652173913043478) internal successors, (84), 14 states have internal predecessors, (84), 10 states have call successors, (16), 10 states have call predecessors, (16), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 12:45:27,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 12:45:27,945 INFO L93 Difference]: Finished difference Result 6168 states and 13112 transitions. [2024-11-13 12:45:27,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2024-11-13 12:45:27,946 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 3.652173913043478) internal successors, (84), 14 states have internal predecessors, (84), 10 states have call successors, (16), 10 states have call predecessors, (16), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 57 [2024-11-13 12:45:27,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 12:45:27,996 INFO L225 Difference]: With dead ends: 6168 [2024-11-13 12:45:27,996 INFO L226 Difference]: Without dead ends: 6167 [2024-11-13 12:45:28,000 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 108 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 180 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=311, Invalid=811, Unknown=0, NotChecked=0, Total=1122 [2024-11-13 12:45:28,001 INFO L432 NwaCegarLoop]: 30 mSDtfsCounter, 507 mSDsluCounter, 343 mSDsCounter, 0 mSdLazyCounter, 328 mSolverCounterSat, 125 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 510 SdHoareTripleChecker+Valid, 373 SdHoareTripleChecker+Invalid, 453 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 125 IncrementalHoareTripleChecker+Valid, 328 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-13 12:45:28,001 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [510 Valid, 373 Invalid, 453 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [125 Valid, 328 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-11-13 12:45:28,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6167 states. [2024-11-13 12:45:29,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6167 to 6083. [2024-11-13 12:45:29,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6083 states, 4222 states have (on average 1.0888204642349597) internal successors, (4597), 4304 states have internal predecessors, (4597), 1161 states have call successors, (1161), 231 states have call predecessors, (1161), 696 states have return successors, (6995), 1547 states have call predecessors, (6995), 1155 states have call successors, (6995) [2024-11-13 12:45:29,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6083 states to 6083 states and 12753 transitions. [2024-11-13 12:45:29,628 INFO L78 Accepts]: Start accepts. Automaton has 6083 states and 12753 transitions. Word has length 57 [2024-11-13 12:45:29,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 12:45:29,628 INFO L471 AbstractCegarLoop]: Abstraction has 6083 states and 12753 transitions. [2024-11-13 12:45:29,629 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 3.652173913043478) internal successors, (84), 14 states have internal predecessors, (84), 10 states have call successors, (16), 10 states have call predecessors, (16), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 12:45:29,629 INFO L276 IsEmpty]: Start isEmpty. Operand 6083 states and 12753 transitions. [2024-11-13 12:45:29,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2024-11-13 12:45:29,632 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 12:45:29,632 INFO L215 NwaCegarLoop]: trace histogram [6, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 12:45:29,654 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0294d2b0-f4e3-4885-8197-bcb4dda18fa6/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2024-11-13 12:45:29,833 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0294d2b0-f4e3-4885-8197-bcb4dda18fa6/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2024-11-13 12:45:29,834 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting ackermannErr6ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2024-11-13 12:45:29,834 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 12:45:29,834 INFO L85 PathProgramCache]: Analyzing trace with hash -476681264, now seen corresponding path program 1 times [2024-11-13 12:45:29,834 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 12:45:29,834 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1321507722] [2024-11-13 12:45:29,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 12:45:29,835 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 12:45:29,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 12:45:29,961 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2024-11-13 12:45:29,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 12:45:30,042 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2024-11-13 12:45:30,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 12:45:30,082 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-11-13 12:45:30,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 12:45:30,131 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2024-11-13 12:45:30,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 12:45:30,173 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 36 proven. 6 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2024-11-13 12:45:30,174 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 12:45:30,174 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1321507722] [2024-11-13 12:45:30,174 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1321507722] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 12:45:30,174 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [232527152] [2024-11-13 12:45:30,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 12:45:30,174 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 12:45:30,174 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0294d2b0-f4e3-4885-8197-bcb4dda18fa6/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 12:45:30,176 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0294d2b0-f4e3-4885-8197-bcb4dda18fa6/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 12:45:30,180 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0294d2b0-f4e3-4885-8197-bcb4dda18fa6/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-11-13 12:45:30,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 12:45:30,248 INFO L255 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 15 conjuncts are in the unsatisfiable core [2024-11-13 12:45:30,250 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 12:45:30,312 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 27 proven. 10 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2024-11-13 12:45:30,313 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 12:45:31,015 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 40 proven. 2 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2024-11-13 12:45:31,016 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [232527152] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 12:45:31,016 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 12:45:31,016 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11, 13] total 26 [2024-11-13 12:45:31,016 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [334724675] [2024-11-13 12:45:31,016 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 12:45:31,017 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2024-11-13 12:45:31,017 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 12:45:31,017 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2024-11-13 12:45:31,018 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=608, Unknown=0, NotChecked=0, Total=702 [2024-11-13 12:45:31,018 INFO L87 Difference]: Start difference. First operand 6083 states and 12753 transitions. Second operand has 27 states, 26 states have (on average 2.3846153846153846) internal successors, (62), 21 states have internal predecessors, (62), 5 states have call successors, (7), 3 states have call predecessors, (7), 8 states have return successors, (9), 8 states have call predecessors, (9), 3 states have call successors, (9) [2024-11-13 12:45:36,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 12:45:36,001 INFO L93 Difference]: Finished difference Result 24358 states and 94287 transitions. [2024-11-13 12:45:36,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2024-11-13 12:45:36,002 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 26 states have (on average 2.3846153846153846) internal successors, (62), 21 states have internal predecessors, (62), 5 states have call successors, (7), 3 states have call predecessors, (7), 8 states have return successors, (9), 8 states have call predecessors, (9), 3 states have call successors, (9) Word has length 55 [2024-11-13 12:45:36,002 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 12:45:36,214 INFO L225 Difference]: With dead ends: 24358 [2024-11-13 12:45:36,214 INFO L226 Difference]: Without dead ends: 19150 [2024-11-13 12:45:36,346 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 105 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1239 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1184, Invalid=4822, Unknown=0, NotChecked=0, Total=6006 [2024-11-13 12:45:36,346 INFO L432 NwaCegarLoop]: 39 mSDtfsCounter, 131 mSDsluCounter, 356 mSDsCounter, 0 mSdLazyCounter, 985 mSolverCounterSat, 119 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 131 SdHoareTripleChecker+Valid, 395 SdHoareTripleChecker+Invalid, 1104 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 119 IncrementalHoareTripleChecker+Valid, 985 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-11-13 12:45:36,346 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [131 Valid, 395 Invalid, 1104 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [119 Valid, 985 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-11-13 12:45:36,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19150 states. [2024-11-13 12:45:40,313 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19150 to 13376. [2024-11-13 12:45:40,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13376 states, 8766 states have (on average 1.0571526351813827) internal successors, (9267), 8809 states have internal predecessors, (9267), 2669 states have call successors, (2669), 308 states have call predecessors, (2669), 1937 states have return successors, (37183), 4258 states have call predecessors, (37183), 2658 states have call successors, (37183) [2024-11-13 12:45:40,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13376 states to 13376 states and 49119 transitions. [2024-11-13 12:45:40,643 INFO L78 Accepts]: Start accepts. Automaton has 13376 states and 49119 transitions. Word has length 55 [2024-11-13 12:45:40,643 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 12:45:40,643 INFO L471 AbstractCegarLoop]: Abstraction has 13376 states and 49119 transitions. [2024-11-13 12:45:40,644 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 26 states have (on average 2.3846153846153846) internal successors, (62), 21 states have internal predecessors, (62), 5 states have call successors, (7), 3 states have call predecessors, (7), 8 states have return successors, (9), 8 states have call predecessors, (9), 3 states have call successors, (9) [2024-11-13 12:45:40,644 INFO L276 IsEmpty]: Start isEmpty. Operand 13376 states and 49119 transitions. [2024-11-13 12:45:40,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2024-11-13 12:45:40,647 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 12:45:40,647 INFO L215 NwaCegarLoop]: trace histogram [7, 7, 7, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1] [2024-11-13 12:45:40,665 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0294d2b0-f4e3-4885-8197-bcb4dda18fa6/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2024-11-13 12:45:40,850 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0294d2b0-f4e3-4885-8197-bcb4dda18fa6/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 12:45:40,851 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting ackermannErr6ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2024-11-13 12:45:40,851 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 12:45:40,851 INFO L85 PathProgramCache]: Analyzing trace with hash 1608770754, now seen corresponding path program 2 times [2024-11-13 12:45:40,851 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 12:45:40,851 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1926069507] [2024-11-13 12:45:40,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 12:45:40,852 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 12:45:40,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 12:45:41,129 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 12:45:41,129 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 12:45:41,129 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1926069507] [2024-11-13 12:45:41,129 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1926069507] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 12:45:41,129 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1203038270] [2024-11-13 12:45:41,129 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-13 12:45:41,129 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 12:45:41,130 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0294d2b0-f4e3-4885-8197-bcb4dda18fa6/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 12:45:41,132 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0294d2b0-f4e3-4885-8197-bcb4dda18fa6/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 12:45:41,134 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0294d2b0-f4e3-4885-8197-bcb4dda18fa6/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-11-13 12:45:41,201 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-13 12:45:41,202 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-13 12:45:41,203 INFO L255 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-11-13 12:45:41,205 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 12:45:41,299 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 12:45:41,299 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 12:45:41,682 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 12:45:41,682 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1203038270] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 12:45:41,682 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 12:45:41,682 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 31 [2024-11-13 12:45:41,682 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1144503164] [2024-11-13 12:45:41,683 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 12:45:41,683 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2024-11-13 12:45:41,683 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 12:45:41,684 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2024-11-13 12:45:41,684 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=244, Invalid=748, Unknown=0, NotChecked=0, Total=992 [2024-11-13 12:45:41,685 INFO L87 Difference]: Start difference. First operand 13376 states and 49119 transitions. Second operand has 32 states, 29 states have (on average 3.4827586206896552) internal successors, (101), 18 states have internal predecessors, (101), 14 states have call successors, (14), 14 states have call predecessors, (14), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 12:45:46,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 12:45:46,473 INFO L93 Difference]: Finished difference Result 20225 states and 73221 transitions. [2024-11-13 12:45:46,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2024-11-13 12:45:46,474 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 29 states have (on average 3.4827586206896552) internal successors, (101), 18 states have internal predecessors, (101), 14 states have call successors, (14), 14 states have call predecessors, (14), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2024-11-13 12:45:46,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 12:45:46,696 INFO L225 Difference]: With dead ends: 20225 [2024-11-13 12:45:46,696 INFO L226 Difference]: Without dead ends: 20224 [2024-11-13 12:45:46,716 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 364 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=573, Invalid=1497, Unknown=0, NotChecked=0, Total=2070 [2024-11-13 12:45:46,719 INFO L432 NwaCegarLoop]: 24 mSDtfsCounter, 459 mSDsluCounter, 448 mSDsCounter, 0 mSdLazyCounter, 460 mSolverCounterSat, 121 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 474 SdHoareTripleChecker+Valid, 472 SdHoareTripleChecker+Invalid, 581 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 121 IncrementalHoareTripleChecker+Valid, 460 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-13 12:45:46,719 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [474 Valid, 472 Invalid, 581 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [121 Valid, 460 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-11-13 12:45:46,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20224 states. [2024-11-13 12:45:51,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20224 to 19840. [2024-11-13 12:45:51,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19840 states, 13022 states have (on average 1.0495315619720473) internal successors, (13667), 13129 states have internal predecessors, (13667), 3917 states have call successors, (3917), 452 states have call predecessors, (3917), 2897 states have return successors, (53631), 6258 states have call predecessors, (53631), 3906 states have call successors, (53631) [2024-11-13 12:45:52,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19840 states to 19840 states and 71215 transitions. [2024-11-13 12:45:52,084 INFO L78 Accepts]: Start accepts. Automaton has 19840 states and 71215 transitions. Word has length 59 [2024-11-13 12:45:52,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 12:45:52,085 INFO L471 AbstractCegarLoop]: Abstraction has 19840 states and 71215 transitions. [2024-11-13 12:45:52,085 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 29 states have (on average 3.4827586206896552) internal successors, (101), 18 states have internal predecessors, (101), 14 states have call successors, (14), 14 states have call predecessors, (14), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 12:45:52,085 INFO L276 IsEmpty]: Start isEmpty. Operand 19840 states and 71215 transitions. [2024-11-13 12:45:52,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2024-11-13 12:45:52,088 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 12:45:52,088 INFO L215 NwaCegarLoop]: trace histogram [9, 7, 5, 5, 5, 5, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 12:45:52,108 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0294d2b0-f4e3-4885-8197-bcb4dda18fa6/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2024-11-13 12:45:52,293 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0294d2b0-f4e3-4885-8197-bcb4dda18fa6/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 12:45:52,293 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting ackermannErr6ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2024-11-13 12:45:52,293 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 12:45:52,294 INFO L85 PathProgramCache]: Analyzing trace with hash -295397423, now seen corresponding path program 2 times [2024-11-13 12:45:52,294 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 12:45:52,294 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [240220503] [2024-11-13 12:45:52,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 12:45:52,294 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 12:45:52,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 12:45:52,481 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2024-11-13 12:45:52,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 12:45:52,562 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-11-13 12:45:52,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 12:45:52,628 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2024-11-13 12:45:52,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 12:45:52,671 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-11-13 12:45:52,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 12:45:52,721 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2024-11-13 12:45:52,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 12:45:52,770 INFO L134 CoverageAnalysis]: Checked inductivity of 163 backedges. 86 proven. 16 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2024-11-13 12:45:52,770 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 12:45:52,770 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [240220503] [2024-11-13 12:45:52,770 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [240220503] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 12:45:52,770 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1335359314] [2024-11-13 12:45:52,771 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-13 12:45:52,771 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 12:45:52,771 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0294d2b0-f4e3-4885-8197-bcb4dda18fa6/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 12:45:52,774 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0294d2b0-f4e3-4885-8197-bcb4dda18fa6/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 12:45:52,776 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0294d2b0-f4e3-4885-8197-bcb4dda18fa6/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2024-11-13 12:45:52,860 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-13 12:45:52,860 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-13 12:45:52,861 INFO L255 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 19 conjuncts are in the unsatisfiable core [2024-11-13 12:45:52,864 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 12:45:52,949 INFO L134 CoverageAnalysis]: Checked inductivity of 163 backedges. 75 proven. 22 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2024-11-13 12:45:52,949 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 12:45:54,129 INFO L134 CoverageAnalysis]: Checked inductivity of 163 backedges. 94 proven. 8 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2024-11-13 12:45:54,130 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1335359314] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 12:45:54,130 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 12:45:54,130 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14, 16] total 32 [2024-11-13 12:45:54,130 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1426666199] [2024-11-13 12:45:54,130 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 12:45:54,131 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2024-11-13 12:45:54,131 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 12:45:54,132 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2024-11-13 12:45:54,132 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=930, Unknown=0, NotChecked=0, Total=1056 [2024-11-13 12:45:54,132 INFO L87 Difference]: Start difference. First operand 19840 states and 71215 transitions. Second operand has 33 states, 32 states have (on average 2.4375) internal successors, (78), 23 states have internal predecessors, (78), 7 states have call successors, (9), 5 states have call predecessors, (9), 8 states have return successors, (11), 10 states have call predecessors, (11), 3 states have call successors, (11) [2024-11-13 12:45:57,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 12:45:57,761 INFO L93 Difference]: Finished difference Result 30265 states and 111648 transitions. [2024-11-13 12:45:57,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2024-11-13 12:45:57,762 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 32 states have (on average 2.4375) internal successors, (78), 23 states have internal predecessors, (78), 7 states have call successors, (9), 5 states have call predecessors, (9), 8 states have return successors, (11), 10 states have call predecessors, (11), 3 states have call successors, (11) Word has length 80 [2024-11-13 12:45:57,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 12:45:57,852 INFO L225 Difference]: With dead ends: 30265 [2024-11-13 12:45:57,852 INFO L226 Difference]: Without dead ends: 12260 [2024-11-13 12:45:58,250 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 213 GetRequests, 156 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 540 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=608, Invalid=2814, Unknown=0, NotChecked=0, Total=3422 [2024-11-13 12:45:58,251 INFO L432 NwaCegarLoop]: 41 mSDtfsCounter, 141 mSDsluCounter, 360 mSDsCounter, 0 mSdLazyCounter, 774 mSolverCounterSat, 97 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 141 SdHoareTripleChecker+Valid, 401 SdHoareTripleChecker+Invalid, 871 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 97 IncrementalHoareTripleChecker+Valid, 774 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-11-13 12:45:58,252 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [141 Valid, 401 Invalid, 871 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [97 Valid, 774 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-11-13 12:45:58,260 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12260 states. [2024-11-13 12:46:00,237 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12260 to 11692. [2024-11-13 12:46:00,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11692 states, 8105 states have (on average 1.073781616286243) internal successors, (8703), 8384 states have internal predecessors, (8703), 2284 states have call successors, (2284), 476 states have call predecessors, (2284), 1299 states have return successors, (7789), 2831 states have call predecessors, (7789), 2276 states have call successors, (7789) [2024-11-13 12:46:00,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11692 states to 11692 states and 18776 transitions. [2024-11-13 12:46:00,327 INFO L78 Accepts]: Start accepts. Automaton has 11692 states and 18776 transitions. Word has length 80 [2024-11-13 12:46:00,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 12:46:00,328 INFO L471 AbstractCegarLoop]: Abstraction has 11692 states and 18776 transitions. [2024-11-13 12:46:00,328 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 32 states have (on average 2.4375) internal successors, (78), 23 states have internal predecessors, (78), 7 states have call successors, (9), 5 states have call predecessors, (9), 8 states have return successors, (11), 10 states have call predecessors, (11), 3 states have call successors, (11) [2024-11-13 12:46:00,328 INFO L276 IsEmpty]: Start isEmpty. Operand 11692 states and 18776 transitions. [2024-11-13 12:46:00,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2024-11-13 12:46:00,331 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 12:46:00,331 INFO L215 NwaCegarLoop]: trace histogram [8, 7, 6, 6, 6, 5, 5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 12:46:00,351 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0294d2b0-f4e3-4885-8197-bcb4dda18fa6/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2024-11-13 12:46:00,534 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0294d2b0-f4e3-4885-8197-bcb4dda18fa6/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2024-11-13 12:46:00,535 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting ackermannErr6ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2024-11-13 12:46:00,535 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 12:46:00,536 INFO L85 PathProgramCache]: Analyzing trace with hash -1699922576, now seen corresponding path program 3 times [2024-11-13 12:46:00,536 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 12:46:00,536 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1683790678] [2024-11-13 12:46:00,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 12:46:00,536 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 12:46:00,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 12:46:00,734 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2024-11-13 12:46:00,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 12:46:00,770 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-11-13 12:46:00,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 12:46:00,820 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 62 proven. 77 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-13 12:46:00,821 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 12:46:00,821 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1683790678] [2024-11-13 12:46:00,821 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1683790678] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 12:46:00,821 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1408857450] [2024-11-13 12:46:00,821 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-13 12:46:00,821 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 12:46:00,821 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0294d2b0-f4e3-4885-8197-bcb4dda18fa6/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 12:46:00,823 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0294d2b0-f4e3-4885-8197-bcb4dda18fa6/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 12:46:00,826 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0294d2b0-f4e3-4885-8197-bcb4dda18fa6/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2024-11-13 12:46:00,919 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2024-11-13 12:46:00,919 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-13 12:46:00,921 INFO L255 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 17 conjuncts are in the unsatisfiable core [2024-11-13 12:46:00,922 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 12:46:01,030 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 60 proven. 79 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-13 12:46:01,030 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 12:46:01,463 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 64 proven. 75 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-13 12:46:01,463 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1408857450] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 12:46:01,463 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 12:46:01,463 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 33 [2024-11-13 12:46:01,463 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [445452157] [2024-11-13 12:46:01,464 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 12:46:01,464 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2024-11-13 12:46:01,464 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 12:46:01,464 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2024-11-13 12:46:01,465 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=949, Unknown=0, NotChecked=0, Total=1122 [2024-11-13 12:46:01,465 INFO L87 Difference]: Start difference. First operand 11692 states and 18776 transitions. Second operand has 34 states, 33 states have (on average 3.121212121212121) internal successors, (103), 22 states have internal predecessors, (103), 11 states have call successors, (13), 11 states have call predecessors, (13), 5 states have return successors, (5), 4 states have call predecessors, (5), 1 states have call successors, (5) [2024-11-13 12:46:04,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 12:46:04,039 INFO L93 Difference]: Finished difference Result 12447 states and 19918 transitions. [2024-11-13 12:46:04,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2024-11-13 12:46:04,040 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 3.121212121212121) internal successors, (103), 22 states have internal predecessors, (103), 11 states have call successors, (13), 11 states have call predecessors, (13), 5 states have return successors, (5), 4 states have call predecessors, (5), 1 states have call successors, (5) Word has length 68 [2024-11-13 12:46:04,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 12:46:04,115 INFO L225 Difference]: With dead ends: 12447 [2024-11-13 12:46:04,116 INFO L226 Difference]: Without dead ends: 12446 [2024-11-13 12:46:04,124 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 127 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 493 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=499, Invalid=2051, Unknown=0, NotChecked=0, Total=2550 [2024-11-13 12:46:04,126 INFO L432 NwaCegarLoop]: 34 mSDtfsCounter, 257 mSDsluCounter, 241 mSDsCounter, 0 mSdLazyCounter, 418 mSolverCounterSat, 199 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 257 SdHoareTripleChecker+Valid, 275 SdHoareTripleChecker+Invalid, 617 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 199 IncrementalHoareTripleChecker+Valid, 418 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-13 12:46:04,126 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [257 Valid, 275 Invalid, 617 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [199 Valid, 418 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-13 12:46:04,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12446 states. [2024-11-13 12:46:06,628 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12446 to 11800. [2024-11-13 12:46:06,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11800 states, 8177 states have (on average 1.0699523052464228) internal successors, (8749), 8456 states have internal predecessors, (8749), 2284 states have call successors, (2284), 476 states have call predecessors, (2284), 1335 states have return successors, (7883), 2867 states have call predecessors, (7883), 2276 states have call successors, (7883) [2024-11-13 12:46:06,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11800 states to 11800 states and 18916 transitions. [2024-11-13 12:46:06,736 INFO L78 Accepts]: Start accepts. Automaton has 11800 states and 18916 transitions. Word has length 68 [2024-11-13 12:46:06,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 12:46:06,737 INFO L471 AbstractCegarLoop]: Abstraction has 11800 states and 18916 transitions. [2024-11-13 12:46:06,737 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 33 states have (on average 3.121212121212121) internal successors, (103), 22 states have internal predecessors, (103), 11 states have call successors, (13), 11 states have call predecessors, (13), 5 states have return successors, (5), 4 states have call predecessors, (5), 1 states have call successors, (5) [2024-11-13 12:46:06,737 INFO L276 IsEmpty]: Start isEmpty. Operand 11800 states and 18916 transitions. [2024-11-13 12:46:06,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2024-11-13 12:46:06,742 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 12:46:06,742 INFO L215 NwaCegarLoop]: trace histogram [9, 7, 5, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2024-11-13 12:46:06,761 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0294d2b0-f4e3-4885-8197-bcb4dda18fa6/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2024-11-13 12:46:06,942 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0294d2b0-f4e3-4885-8197-bcb4dda18fa6/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2024-11-13 12:46:06,943 INFO L396 AbstractCegarLoop]: === Iteration 23 === Targeting ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2024-11-13 12:46:06,943 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 12:46:06,943 INFO L85 PathProgramCache]: Analyzing trace with hash -444123128, now seen corresponding path program 2 times [2024-11-13 12:46:06,943 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 12:46:06,944 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1898550857] [2024-11-13 12:46:06,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 12:46:06,944 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 12:46:06,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 12:46:07,022 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2024-11-13 12:46:07,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 12:46:07,072 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-11-13 12:46:07,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 12:46:07,147 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2024-11-13 12:46:07,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 12:46:07,203 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2024-11-13 12:46:07,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 12:46:07,244 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-11-13 12:46:07,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 12:46:07,251 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2024-11-13 12:46:07,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 12:46:07,257 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2024-11-13 12:46:07,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 12:46:07,263 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 83 proven. 28 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2024-11-13 12:46:07,263 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 12:46:07,263 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1898550857] [2024-11-13 12:46:07,263 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1898550857] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 12:46:07,263 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [40301832] [2024-11-13 12:46:07,263 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-13 12:46:07,264 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 12:46:07,264 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0294d2b0-f4e3-4885-8197-bcb4dda18fa6/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 12:46:07,266 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0294d2b0-f4e3-4885-8197-bcb4dda18fa6/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 12:46:07,269 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0294d2b0-f4e3-4885-8197-bcb4dda18fa6/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2024-11-13 12:46:07,363 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-13 12:46:07,364 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-13 12:46:07,365 INFO L255 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-11-13 12:46:07,367 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 12:46:07,449 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 85 proven. 15 refuted. 0 times theorem prover too weak. 62 trivial. 0 not checked. [2024-11-13 12:46:07,450 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 12:46:07,898 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 85 proven. 26 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2024-11-13 12:46:07,898 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [40301832] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 12:46:07,898 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 12:46:07,898 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6, 8] total 14 [2024-11-13 12:46:07,898 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1097244255] [2024-11-13 12:46:07,898 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 12:46:07,899 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-11-13 12:46:07,899 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 12:46:07,900 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-11-13 12:46:07,900 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2024-11-13 12:46:07,901 INFO L87 Difference]: Start difference. First operand 11800 states and 18916 transitions. Second operand has 14 states, 14 states have (on average 6.0) internal successors, (84), 14 states have internal predecessors, (84), 12 states have call successors, (14), 2 states have call predecessors, (14), 7 states have return successors, (14), 6 states have call predecessors, (14), 11 states have call successors, (14)