./Ultimate.py --spec ../../sv-benchmarks/c/properties/no-overflow.prp --file ../../sv-benchmarks/c/recursive-simple/fibo_2calls_4-2.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_a5904c0b-8133-4829-97b6-30abfab23ef8/bin/utaipan-verify-sOmjnqqW8E/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5904c0b-8133-4829-97b6-30abfab23ef8/bin/utaipan-verify-sOmjnqqW8E/plugins/org.eclipse.equinox.launcher_1.6.800.v20240513-1750.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5904c0b-8133-4829-97b6-30abfab23ef8/bin/utaipan-verify-sOmjnqqW8E/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5904c0b-8133-4829-97b6-30abfab23ef8/bin/utaipan-verify-sOmjnqqW8E/config/TaipanReach.xml -i ../../sv-benchmarks/c/recursive-simple/fibo_2calls_4-2.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5904c0b-8133-4829-97b6-30abfab23ef8/bin/utaipan-verify-sOmjnqqW8E/config/svcomp-Overflow-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5904c0b-8133-4829-97b6-30abfab23ef8/bin/utaipan-verify-sOmjnqqW8E --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 Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 22d9a6832a4080412e38f5d573b63985f3b10b3c2009b6559595c7c0bbda414f --- Real Ultimate output --- This is Ultimate 0.3.0-dev-826ab2b [2024-11-14 03:12:09,861 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-14 03:12:09,951 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5904c0b-8133-4829-97b6-30abfab23ef8/bin/utaipan-verify-sOmjnqqW8E/config/svcomp-Overflow-32bit-Taipan_Default.epf [2024-11-14 03:12:09,960 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-14 03:12:09,960 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-14 03:12:09,992 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-14 03:12:09,993 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-14 03:12:09,993 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-14 03:12:09,993 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-14 03:12:09,993 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-14 03:12:09,994 INFO L153 SettingsManager]: * User list type=DISABLED [2024-11-14 03:12:09,994 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2024-11-14 03:12:09,994 INFO L153 SettingsManager]: * Explicit value domain=true [2024-11-14 03:12:09,995 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2024-11-14 03:12:09,995 INFO L153 SettingsManager]: * Octagon Domain=false [2024-11-14 03:12:09,995 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2024-11-14 03:12:09,995 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2024-11-14 03:12:09,995 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2024-11-14 03:12:09,996 INFO L153 SettingsManager]: * Interval Domain=false [2024-11-14 03:12:09,996 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2024-11-14 03:12:09,996 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2024-11-14 03:12:09,996 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2024-11-14 03:12:09,996 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-14 03:12:09,997 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-14 03:12:09,997 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-14 03:12:09,997 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-14 03:12:09,997 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-14 03:12:09,997 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-14 03:12:09,997 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-14 03:12:09,997 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-14 03:12:09,997 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-14 03:12:09,997 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-14 03:12:09,997 INFO L153 SettingsManager]: * Check absence of signed integer overflows=ASSERTandASSUME [2024-11-14 03:12:09,997 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-11-14 03:12:09,997 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-14 03:12:09,998 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-14 03:12:09,998 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-14 03:12:09,998 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-14 03:12:09,998 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-14 03:12:09,998 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-14 03:12:09,998 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2024-11-14 03:12:09,998 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-14 03:12:09,998 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-14 03:12:09,998 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-14 03:12:09,999 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2024-11-14 03:12:09,999 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-14 03:12:09,999 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-14 03:12:09,999 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2024-11-14 03:12:09,999 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-14 03:12:09,999 INFO L153 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES 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_a5904c0b-8133-4829-97b6-30abfab23ef8/bin/utaipan-verify-sOmjnqqW8E 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 -> Taipan 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 -> 22d9a6832a4080412e38f5d573b63985f3b10b3c2009b6559595c7c0bbda414f [2024-11-14 03:12:10,328 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-14 03:12:10,342 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-14 03:12:10,344 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-14 03:12:10,346 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-14 03:12:10,346 INFO L274 PluginConnector]: CDTParser initialized [2024-11-14 03:12:10,348 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5904c0b-8133-4829-97b6-30abfab23ef8/bin/utaipan-verify-sOmjnqqW8E/../../sv-benchmarks/c/recursive-simple/fibo_2calls_4-2.c Unable to find full path for "g++" [2024-11-14 03:12:12,242 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-14 03:12:12,483 INFO L384 CDTParser]: Found 1 translation units. [2024-11-14 03:12:12,484 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5904c0b-8133-4829-97b6-30abfab23ef8/sv-benchmarks/c/recursive-simple/fibo_2calls_4-2.c [2024-11-14 03:12:12,496 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5904c0b-8133-4829-97b6-30abfab23ef8/bin/utaipan-verify-sOmjnqqW8E/data/7e9610b24/9cf220d7bff648aaa1285d05917018f3/FLAGbce13b92c [2024-11-14 03:12:12,802 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5904c0b-8133-4829-97b6-30abfab23ef8/bin/utaipan-verify-sOmjnqqW8E/data/7e9610b24/9cf220d7bff648aaa1285d05917018f3 [2024-11-14 03:12:12,804 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-14 03:12:12,806 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-14 03:12:12,807 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-14 03:12:12,807 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-14 03:12:12,812 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-14 03:12:12,812 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.11 03:12:12" (1/1) ... [2024-11-14 03:12:12,813 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4ddef2bb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 03:12:12, skipping insertion in model container [2024-11-14 03:12:12,813 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.11 03:12:12" (1/1) ... [2024-11-14 03:12:12,827 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-14 03:12:12,974 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-14 03:12:12,985 INFO L200 MainTranslator]: Completed pre-run [2024-11-14 03:12:13,001 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-14 03:12:13,016 INFO L204 MainTranslator]: Completed translation [2024-11-14 03:12:13,017 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 03:12:13 WrapperNode [2024-11-14 03:12:13,017 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-14 03:12:13,018 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-14 03:12:13,018 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-14 03:12:13,021 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-14 03:12:13,028 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 03:12:13" (1/1) ... [2024-11-14 03:12:13,034 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 03:12:13" (1/1) ... [2024-11-14 03:12:13,046 INFO L138 Inliner]: procedures = 14, calls = 13, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 21 [2024-11-14 03:12:13,046 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-14 03:12:13,047 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-14 03:12:13,047 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-14 03:12:13,047 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-14 03:12:13,051 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 03:12:13" (1/1) ... [2024-11-14 03:12:13,051 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 03:12:13" (1/1) ... [2024-11-14 03:12:13,053 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 03:12:13" (1/1) ... [2024-11-14 03:12:13,053 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 03:12:13" (1/1) ... [2024-11-14 03:12:13,055 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 03:12:13" (1/1) ... [2024-11-14 03:12:13,057 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 03:12:13" (1/1) ... [2024-11-14 03:12:13,058 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 03:12:13" (1/1) ... [2024-11-14 03:12:13,059 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 03:12:13" (1/1) ... [2024-11-14 03:12:13,060 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-14 03:12:13,061 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-14 03:12:13,061 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-14 03:12:13,061 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-14 03:12:13,062 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 03:12:13" (1/1) ... [2024-11-14 03:12:13,070 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2024-11-14 03:12:13,083 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5904c0b-8133-4829-97b6-30abfab23ef8/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 03:12:13,097 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5904c0b-8133-4829-97b6-30abfab23ef8/bin/utaipan-verify-sOmjnqqW8E/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2024-11-14 03:12:13,101 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5904c0b-8133-4829-97b6-30abfab23ef8/bin/utaipan-verify-sOmjnqqW8E/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2024-11-14 03:12:13,132 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-14 03:12:13,132 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2024-11-14 03:12:13,132 INFO L130 BoogieDeclarations]: Found specification of procedure fibo2 [2024-11-14 03:12:13,133 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo2 [2024-11-14 03:12:13,133 INFO L130 BoogieDeclarations]: Found specification of procedure fibo1 [2024-11-14 03:12:13,133 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo1 [2024-11-14 03:12:13,133 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-14 03:12:13,133 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-14 03:12:13,214 INFO L238 CfgBuilder]: Building ICFG [2024-11-14 03:12:13,216 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-14 03:12:13,444 INFO L? ?]: Removed 24 outVars from TransFormulas that were not future-live. [2024-11-14 03:12:13,444 INFO L287 CfgBuilder]: Performing block encoding [2024-11-14 03:12:13,496 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-14 03:12:13,496 INFO L316 CfgBuilder]: Removed 0 assume(true) statements. [2024-11-14 03:12:13,497 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.11 03:12:13 BoogieIcfgContainer [2024-11-14 03:12:13,497 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-14 03:12:13,500 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-14 03:12:13,500 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-14 03:12:13,505 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-14 03:12:13,505 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.11 03:12:12" (1/3) ... [2024-11-14 03:12:13,506 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@63e48292 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.11 03:12:13, skipping insertion in model container [2024-11-14 03:12:13,506 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 03:12:13" (2/3) ... [2024-11-14 03:12:13,507 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@63e48292 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.11 03:12:13, skipping insertion in model container [2024-11-14 03:12:13,507 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.11 03:12:13" (3/3) ... [2024-11-14 03:12:13,508 INFO L112 eAbstractionObserver]: Analyzing ICFG fibo_2calls_4-2.c [2024-11-14 03:12:13,526 INFO L217 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-14 03:12:13,528 INFO L154 ceAbstractionStarter]: Applying trace abstraction to ICFG fibo_2calls_4-2.c that has 3 procedures, 46 locations, 1 initial locations, 0 loop locations, and 12 error locations. [2024-11-14 03:12:13,599 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-14 03:12:13,613 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=FINITE_AUTOMATA, 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;@1ab69597, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-14 03:12:13,613 INFO L334 AbstractCegarLoop]: Starting to check reachability of 12 error locations. [2024-11-14 03:12:13,618 INFO L276 IsEmpty]: Start isEmpty. Operand has 46 states, 26 states have (on average 1.6153846153846154) internal successors, (42), 38 states have internal predecessors, (42), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2024-11-14 03:12:13,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2024-11-14 03:12:13,625 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:12:13,626 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2024-11-14 03:12:13,626 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting fibo1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [fibo2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, fibo2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, fibo2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 9 more)] === [2024-11-14 03:12:13,633 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:12:13,633 INFO L85 PathProgramCache]: Analyzing trace with hash -1021543012, now seen corresponding path program 1 times [2024-11-14 03:12:13,642 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:12:13,642 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [676077034] [2024-11-14 03:12:13,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:12:13,643 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:12:13,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:12:13,841 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 03:12:13,841 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:12:13,841 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [676077034] [2024-11-14 03:12:13,842 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [676077034] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 03:12:13,842 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-14 03:12:13,843 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-14 03:12:13,844 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1018555398] [2024-11-14 03:12:13,845 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 03:12:13,848 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-14 03:12:13,849 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:12:13,866 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-14 03:12:13,867 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-14 03:12:13,869 INFO L87 Difference]: Start difference. First operand has 46 states, 26 states have (on average 1.6153846153846154) internal successors, (42), 38 states have internal predecessors, (42), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Second operand has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 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) [2024-11-14 03:12:13,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:12:13,936 INFO L93 Difference]: Finished difference Result 48 states and 56 transitions. [2024-11-14 03:12:13,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-14 03:12:13,939 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 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 6 [2024-11-14 03:12:13,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:12:13,950 INFO L225 Difference]: With dead ends: 48 [2024-11-14 03:12:13,950 INFO L226 Difference]: Without dead ends: 44 [2024-11-14 03:12:13,953 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-14 03:12:13,958 INFO L432 NwaCegarLoop]: 44 mSDtfsCounter, 11 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 76 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-14 03:12:13,958 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 76 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-14 03:12:13,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2024-11-14 03:12:14,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 42. [2024-11-14 03:12:14,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 25 states have (on average 1.56) internal successors, (39), 35 states have internal predecessors, (39), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2024-11-14 03:12:14,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 48 transitions. [2024-11-14 03:12:14,008 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 48 transitions. Word has length 6 [2024-11-14 03:12:14,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:12:14,009 INFO L471 AbstractCegarLoop]: Abstraction has 42 states and 48 transitions. [2024-11-14 03:12:14,009 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 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) [2024-11-14 03:12:14,009 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 48 transitions. [2024-11-14 03:12:14,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2024-11-14 03:12:14,010 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:12:14,011 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-11-14 03:12:14,011 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-14 03:12:14,011 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting fibo1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [fibo2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, fibo2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, fibo2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 9 more)] === [2024-11-14 03:12:14,011 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:12:14,012 INFO L85 PathProgramCache]: Analyzing trace with hash -1603062213, now seen corresponding path program 1 times [2024-11-14 03:12:14,012 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:12:14,012 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [903533286] [2024-11-14 03:12:14,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:12:14,012 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:12:14,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:12:14,092 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 03:12:14,092 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:12:14,092 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [903533286] [2024-11-14 03:12:14,092 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [903533286] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 03:12:14,093 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-14 03:12:14,093 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-14 03:12:14,093 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [17925255] [2024-11-14 03:12:14,093 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 03:12:14,094 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-14 03:12:14,094 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:12:14,094 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-14 03:12:14,095 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-14 03:12:14,095 INFO L87 Difference]: Start difference. First operand 42 states and 48 transitions. Second operand has 5 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 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) [2024-11-14 03:12:14,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:12:14,205 INFO L93 Difference]: Finished difference Result 63 states and 71 transitions. [2024-11-14 03:12:14,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-14 03:12:14,206 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 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 7 [2024-11-14 03:12:14,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:12:14,207 INFO L225 Difference]: With dead ends: 63 [2024-11-14 03:12:14,207 INFO L226 Difference]: Without dead ends: 57 [2024-11-14 03:12:14,208 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-11-14 03:12:14,209 INFO L432 NwaCegarLoop]: 39 mSDtfsCounter, 26 mSDsluCounter, 118 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 157 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-14 03:12:14,209 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 157 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-14 03:12:14,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2024-11-14 03:12:14,221 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 55. [2024-11-14 03:12:14,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 36 states have (on average 1.4166666666666667) internal successors, (51), 45 states have internal predecessors, (51), 7 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2024-11-14 03:12:14,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 64 transitions. [2024-11-14 03:12:14,223 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 64 transitions. Word has length 7 [2024-11-14 03:12:14,224 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:12:14,224 INFO L471 AbstractCegarLoop]: Abstraction has 55 states and 64 transitions. [2024-11-14 03:12:14,224 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 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) [2024-11-14 03:12:14,224 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 64 transitions. [2024-11-14 03:12:14,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2024-11-14 03:12:14,225 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:12:14,225 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 03:12:14,225 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-14 03:12:14,226 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting fibo2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [fibo2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, fibo2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, fibo2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 9 more)] === [2024-11-14 03:12:14,226 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:12:14,226 INFO L85 PathProgramCache]: Analyzing trace with hash 1070030294, now seen corresponding path program 1 times [2024-11-14 03:12:14,227 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:12:14,227 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [984904141] [2024-11-14 03:12:14,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:12:14,227 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:12:14,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:12:14,293 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 03:12:14,294 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:12:14,294 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [984904141] [2024-11-14 03:12:14,294 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [984904141] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 03:12:14,294 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-14 03:12:14,294 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-14 03:12:14,295 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1041482440] [2024-11-14 03:12:14,295 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 03:12:14,295 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-14 03:12:14,295 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:12:14,296 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-14 03:12:14,296 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-14 03:12:14,297 INFO L87 Difference]: Start difference. First operand 55 states and 64 transitions. Second operand has 3 states, 2 states have (on average 5.0) internal successors, (10), 3 states have internal predecessors, (10), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 03:12:14,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:12:14,351 INFO L93 Difference]: Finished difference Result 57 states and 69 transitions. [2024-11-14 03:12:14,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-14 03:12:14,359 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 5.0) internal successors, (10), 3 states have internal predecessors, (10), 1 states have call successors, (2), 1 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 12 [2024-11-14 03:12:14,359 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:12:14,360 INFO L225 Difference]: With dead ends: 57 [2024-11-14 03:12:14,360 INFO L226 Difference]: Without dead ends: 55 [2024-11-14 03:12:14,360 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-14 03:12:14,361 INFO L432 NwaCegarLoop]: 40 mSDtfsCounter, 11 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-14 03:12:14,362 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 68 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-14 03:12:14,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2024-11-14 03:12:14,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 53. [2024-11-14 03:12:14,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 36 states have (on average 1.3611111111111112) internal successors, (49), 43 states have internal predecessors, (49), 7 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2024-11-14 03:12:14,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 62 transitions. [2024-11-14 03:12:14,376 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 62 transitions. Word has length 12 [2024-11-14 03:12:14,376 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:12:14,376 INFO L471 AbstractCegarLoop]: Abstraction has 53 states and 62 transitions. [2024-11-14 03:12:14,377 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 5.0) internal successors, (10), 3 states have internal predecessors, (10), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 03:12:14,377 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 62 transitions. [2024-11-14 03:12:14,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2024-11-14 03:12:14,377 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:12:14,377 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 03:12:14,378 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-11-14 03:12:14,378 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting fibo2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [fibo2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, fibo2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, fibo2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 9 more)] === [2024-11-14 03:12:14,378 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:12:14,378 INFO L85 PathProgramCache]: Analyzing trace with hash -1188799193, now seen corresponding path program 1 times [2024-11-14 03:12:14,378 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:12:14,379 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1867581390] [2024-11-14 03:12:14,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:12:14,379 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:12:14,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:12:14,510 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 03:12:14,510 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:12:14,511 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1867581390] [2024-11-14 03:12:14,511 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1867581390] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 03:12:14,511 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-14 03:12:14,511 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-14 03:12:14,511 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1892060405] [2024-11-14 03:12:14,511 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 03:12:14,512 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-14 03:12:14,515 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:12:14,516 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-14 03:12:14,516 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2024-11-14 03:12:14,516 INFO L87 Difference]: Start difference. First operand 53 states and 62 transitions. Second operand has 7 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 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) [2024-11-14 03:12:14,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:12:14,755 INFO L93 Difference]: Finished difference Result 57 states and 70 transitions. [2024-11-14 03:12:14,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-14 03:12:14,756 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 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 13 [2024-11-14 03:12:14,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:12:14,757 INFO L225 Difference]: With dead ends: 57 [2024-11-14 03:12:14,757 INFO L226 Difference]: Without dead ends: 53 [2024-11-14 03:12:14,757 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-11-14 03:12:14,758 INFO L432 NwaCegarLoop]: 21 mSDtfsCounter, 51 mSDsluCounter, 70 mSDsCounter, 0 mSdLazyCounter, 113 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 91 SdHoareTripleChecker+Invalid, 127 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 113 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-14 03:12:14,758 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [51 Valid, 91 Invalid, 127 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 113 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-14 03:12:14,759 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2024-11-14 03:12:14,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 49. [2024-11-14 03:12:14,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 36 states have (on average 1.25) internal successors, (45), 39 states have internal predecessors, (45), 7 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2024-11-14 03:12:14,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 58 transitions. [2024-11-14 03:12:14,771 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 58 transitions. Word has length 13 [2024-11-14 03:12:14,771 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:12:14,771 INFO L471 AbstractCegarLoop]: Abstraction has 49 states and 58 transitions. [2024-11-14 03:12:14,771 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 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) [2024-11-14 03:12:14,772 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 58 transitions. [2024-11-14 03:12:14,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2024-11-14 03:12:14,772 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:12:14,772 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 03:12:14,773 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-11-14 03:12:14,773 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting fibo1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW === [fibo2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, fibo2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, fibo2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 9 more)] === [2024-11-14 03:12:14,773 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:12:14,773 INFO L85 PathProgramCache]: Analyzing trace with hash 1317113808, now seen corresponding path program 1 times [2024-11-14 03:12:14,773 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:12:14,775 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1965001553] [2024-11-14 03:12:14,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:12:14,775 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:12:14,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:12:14,903 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-14 03:12:14,903 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:12:14,903 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1965001553] [2024-11-14 03:12:14,904 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1965001553] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 03:12:14,904 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-14 03:12:14,904 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-14 03:12:14,904 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1934374863] [2024-11-14 03:12:14,904 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 03:12:14,904 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-14 03:12:14,904 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:12:14,905 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-14 03:12:14,905 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-14 03:12:14,906 INFO L87 Difference]: Start difference. First operand 49 states and 58 transitions. Second operand has 5 states, 4 states have (on average 3.5) internal successors, (14), 5 states have internal predecessors, (14), 2 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-14 03:12:14,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:12:14,978 INFO L93 Difference]: Finished difference Result 73 states and 93 transitions. [2024-11-14 03:12:14,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-14 03:12:14,978 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.5) internal successors, (14), 5 states have internal predecessors, (14), 2 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 22 [2024-11-14 03:12:14,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:12:14,980 INFO L225 Difference]: With dead ends: 73 [2024-11-14 03:12:14,980 INFO L226 Difference]: Without dead ends: 68 [2024-11-14 03:12:14,981 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-14 03:12:14,982 INFO L432 NwaCegarLoop]: 37 mSDtfsCounter, 3 mSDsluCounter, 103 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 140 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-14 03:12:14,982 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 140 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-14 03:12:14,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2024-11-14 03:12:15,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 62. [2024-11-14 03:12:15,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 46 states have (on average 1.1956521739130435) internal successors, (55), 49 states have internal predecessors, (55), 9 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (13), 9 states have call predecessors, (13), 8 states have call successors, (13) [2024-11-14 03:12:15,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 77 transitions. [2024-11-14 03:12:15,006 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 77 transitions. Word has length 22 [2024-11-14 03:12:15,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:12:15,007 INFO L471 AbstractCegarLoop]: Abstraction has 62 states and 77 transitions. [2024-11-14 03:12:15,007 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.5) internal successors, (14), 5 states have internal predecessors, (14), 2 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-14 03:12:15,007 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 77 transitions. [2024-11-14 03:12:15,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2024-11-14 03:12:15,008 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:12:15,008 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 03:12:15,008 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-11-14 03:12:15,008 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting fibo1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW === [fibo2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, fibo2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, fibo2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 9 more)] === [2024-11-14 03:12:15,009 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:12:15,009 INFO L85 PathProgramCache]: Analyzing trace with hash -2108197165, now seen corresponding path program 1 times [2024-11-14 03:12:15,009 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:12:15,009 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1618013623] [2024-11-14 03:12:15,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:12:15,009 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:12:15,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:12:15,135 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-14 03:12:15,135 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:12:15,135 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1618013623] [2024-11-14 03:12:15,135 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1618013623] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 03:12:15,135 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [803114330] [2024-11-14 03:12:15,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:12:15,135 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:12:15,136 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5904c0b-8133-4829-97b6-30abfab23ef8/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 03:12:15,140 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5904c0b-8133-4829-97b6-30abfab23ef8/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 03:12:15,142 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5904c0b-8133-4829-97b6-30abfab23ef8/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-14 03:12:15,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:12:15,203 INFO L255 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-14 03:12:15,209 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 03:12:15,327 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 03:12:15,327 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-14 03:12:15,327 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [803114330] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 03:12:15,327 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-14 03:12:15,328 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [5] total 11 [2024-11-14 03:12:15,328 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1759907251] [2024-11-14 03:12:15,328 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 03:12:15,328 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-14 03:12:15,329 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:12:15,329 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-14 03:12:15,329 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=90, Unknown=0, NotChecked=0, Total=110 [2024-11-14 03:12:15,329 INFO L87 Difference]: Start difference. First operand 62 states and 77 transitions. Second operand has 7 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-14 03:12:15,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:12:15,504 INFO L93 Difference]: Finished difference Result 112 states and 139 transitions. [2024-11-14 03:12:15,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-14 03:12:15,505 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 23 [2024-11-14 03:12:15,505 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:12:15,506 INFO L225 Difference]: With dead ends: 112 [2024-11-14 03:12:15,506 INFO L226 Difference]: Without dead ends: 62 [2024-11-14 03:12:15,506 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2024-11-14 03:12:15,507 INFO L432 NwaCegarLoop]: 27 mSDtfsCounter, 32 mSDsluCounter, 115 mSDsCounter, 0 mSdLazyCounter, 117 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 142 SdHoareTripleChecker+Invalid, 122 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 117 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-14 03:12:15,507 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 142 Invalid, 122 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 117 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-14 03:12:15,508 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2024-11-14 03:12:15,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 58. [2024-11-14 03:12:15,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 43 states have (on average 1.2093023255813953) internal successors, (52), 46 states have internal predecessors, (52), 8 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (10), 8 states have call predecessors, (10), 7 states have call successors, (10) [2024-11-14 03:12:15,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 70 transitions. [2024-11-14 03:12:15,516 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 70 transitions. Word has length 23 [2024-11-14 03:12:15,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:12:15,517 INFO L471 AbstractCegarLoop]: Abstraction has 58 states and 70 transitions. [2024-11-14 03:12:15,517 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-14 03:12:15,517 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 70 transitions. [2024-11-14 03:12:15,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2024-11-14 03:12:15,519 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:12:15,519 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 03:12:15,543 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5904c0b-8133-4829-97b6-30abfab23ef8/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-14 03:12:15,719 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5904c0b-8133-4829-97b6-30abfab23ef8/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:12:15,720 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting fibo1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW === [fibo2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, fibo2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, fibo2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 9 more)] === [2024-11-14 03:12:15,720 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:12:15,720 INFO L85 PathProgramCache]: Analyzing trace with hash 1308693282, now seen corresponding path program 1 times [2024-11-14 03:12:15,720 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:12:15,721 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [41266066] [2024-11-14 03:12:15,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:12:15,721 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:12:15,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:12:15,833 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-14 03:12:15,833 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:12:15,833 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [41266066] [2024-11-14 03:12:15,833 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [41266066] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 03:12:15,833 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-14 03:12:15,833 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-14 03:12:15,833 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [644590574] [2024-11-14 03:12:15,833 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 03:12:15,833 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-14 03:12:15,834 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:12:15,834 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-14 03:12:15,834 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-14 03:12:15,834 INFO L87 Difference]: Start difference. First operand 58 states and 70 transitions. Second operand has 5 states, 4 states have (on average 3.75) internal successors, (15), 5 states have internal predecessors, (15), 2 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-14 03:12:15,905 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:12:15,905 INFO L93 Difference]: Finished difference Result 82 states and 107 transitions. [2024-11-14 03:12:15,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-14 03:12:15,906 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.75) internal successors, (15), 5 states have internal predecessors, (15), 2 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 24 [2024-11-14 03:12:15,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:12:15,907 INFO L225 Difference]: With dead ends: 82 [2024-11-14 03:12:15,909 INFO L226 Difference]: Without dead ends: 77 [2024-11-14 03:12:15,909 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-14 03:12:15,922 INFO L432 NwaCegarLoop]: 37 mSDtfsCounter, 3 mSDsluCounter, 106 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 143 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-14 03:12:15,922 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 143 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-14 03:12:15,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2024-11-14 03:12:15,937 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 68. [2024-11-14 03:12:15,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 50 states have (on average 1.18) internal successors, (59), 54 states have internal predecessors, (59), 10 states have call successors, (10), 3 states have call predecessors, (10), 4 states have return successors, (19), 10 states have call predecessors, (19), 9 states have call successors, (19) [2024-11-14 03:12:15,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 88 transitions. [2024-11-14 03:12:15,943 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 88 transitions. Word has length 24 [2024-11-14 03:12:15,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:12:15,944 INFO L471 AbstractCegarLoop]: Abstraction has 68 states and 88 transitions. [2024-11-14 03:12:15,944 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.75) internal successors, (15), 5 states have internal predecessors, (15), 2 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-14 03:12:15,944 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 88 transitions. [2024-11-14 03:12:15,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2024-11-14 03:12:15,945 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:12:15,945 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, 1, 1, 1] [2024-11-14 03:12:15,946 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-11-14 03:12:15,946 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting fibo2Err4ASSERT_VIOLATIONINTEGER_OVERFLOW === [fibo2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, fibo2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, fibo2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 9 more)] === [2024-11-14 03:12:15,946 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:12:15,946 INFO L85 PathProgramCache]: Analyzing trace with hash 1559204346, now seen corresponding path program 1 times [2024-11-14 03:12:15,946 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:12:15,946 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1567536964] [2024-11-14 03:12:15,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:12:15,946 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:12:15,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:12:16,080 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-14 03:12:16,081 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:12:16,081 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1567536964] [2024-11-14 03:12:16,082 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1567536964] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 03:12:16,082 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-14 03:12:16,082 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-14 03:12:16,082 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [378594011] [2024-11-14 03:12:16,083 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 03:12:16,083 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-14 03:12:16,083 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:12:16,083 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-14 03:12:16,084 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-14 03:12:16,084 INFO L87 Difference]: Start difference. First operand 68 states and 88 transitions. Second operand has 5 states, 4 states have (on average 4.5) internal successors, (18), 5 states have internal predecessors, (18), 2 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-14 03:12:16,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:12:16,149 INFO L93 Difference]: Finished difference Result 82 states and 107 transitions. [2024-11-14 03:12:16,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-14 03:12:16,150 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 4.5) internal successors, (18), 5 states have internal predecessors, (18), 2 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 28 [2024-11-14 03:12:16,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:12:16,152 INFO L225 Difference]: With dead ends: 82 [2024-11-14 03:12:16,152 INFO L226 Difference]: Without dead ends: 80 [2024-11-14 03:12:16,153 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-14 03:12:16,154 INFO L432 NwaCegarLoop]: 37 mSDtfsCounter, 3 mSDsluCounter, 103 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 140 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-14 03:12:16,155 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 140 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-14 03:12:16,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2024-11-14 03:12:16,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 77. [2024-11-14 03:12:16,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 57 states have (on average 1.1578947368421053) internal successors, (66), 61 states have internal predecessors, (66), 11 states have call successors, (11), 3 states have call predecessors, (11), 5 states have return successors, (23), 12 states have call predecessors, (23), 10 states have call successors, (23) [2024-11-14 03:12:16,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 100 transitions. [2024-11-14 03:12:16,181 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 100 transitions. Word has length 28 [2024-11-14 03:12:16,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:12:16,181 INFO L471 AbstractCegarLoop]: Abstraction has 77 states and 100 transitions. [2024-11-14 03:12:16,181 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 4.5) internal successors, (18), 5 states have internal predecessors, (18), 2 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-14 03:12:16,182 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 100 transitions. [2024-11-14 03:12:16,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2024-11-14 03:12:16,183 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:12:16,183 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, 1, 1, 1, 1] [2024-11-14 03:12:16,183 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-11-14 03:12:16,183 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting fibo2Err4ASSERT_VIOLATIONINTEGER_OVERFLOW === [fibo2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, fibo2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, fibo2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 9 more)] === [2024-11-14 03:12:16,184 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:12:16,184 INFO L85 PathProgramCache]: Analyzing trace with hash 1102557063, now seen corresponding path program 1 times [2024-11-14 03:12:16,184 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:12:16,184 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [738293073] [2024-11-14 03:12:16,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:12:16,184 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:12:16,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:12:16,294 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-11-14 03:12:16,295 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:12:16,295 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [738293073] [2024-11-14 03:12:16,298 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [738293073] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 03:12:16,298 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1654441408] [2024-11-14 03:12:16,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:12:16,298 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:12:16,298 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5904c0b-8133-4829-97b6-30abfab23ef8/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 03:12:16,300 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5904c0b-8133-4829-97b6-30abfab23ef8/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 03:12:16,304 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5904c0b-8133-4829-97b6-30abfab23ef8/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-14 03:12:16,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:12:16,356 INFO L255 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-14 03:12:16,358 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 03:12:16,508 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 7 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 03:12:16,509 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 03:12:16,749 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-14 03:12:16,749 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1654441408] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 03:12:16,749 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1944320672] [2024-11-14 03:12:16,767 INFO L159 IcfgInterpreter]: Started Sifa with 23 locations of interest [2024-11-14 03:12:16,767 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 03:12:16,771 FATAL L? ?]: Ignoring exception! java.lang.IllegalArgumentException: Recursive programs are not supported. at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.topsortRelevant(CallGraph.java:132) at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.(CallGraph.java:97) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.(IcfgInterpreter.java:92) at de.uni_freiburg.informatik.ultimate.plugins.sifa.SifaBuilder.construct(SifaBuilder.java:96) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:98) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:68) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:267) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:148) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:137) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:407) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:342) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:324) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:429) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:315) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:276) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:170) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:143) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:167) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:150) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:127) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:233) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:227) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:144) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:106) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:319) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2024-11-14 03:12:16,774 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 03:12:16,774 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 9, 9] total 19 [2024-11-14 03:12:16,774 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1835871269] [2024-11-14 03:12:16,774 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 03:12:16,775 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-11-14 03:12:16,775 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:12:16,775 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-11-14 03:12:16,776 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=297, Unknown=0, NotChecked=0, Total=342 [2024-11-14 03:12:16,776 INFO L87 Difference]: Start difference. First operand 77 states and 100 transitions. Second operand has 19 states, 17 states have (on average 3.411764705882353) internal successors, (58), 15 states have internal predecessors, (58), 9 states have call successors, (12), 6 states have call predecessors, (12), 5 states have return successors, (6), 3 states have call predecessors, (6), 5 states have call successors, (6) [2024-11-14 03:12:17,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:12:17,274 INFO L93 Difference]: Finished difference Result 186 states and 249 transitions. [2024-11-14 03:12:17,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-11-14 03:12:17,274 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 17 states have (on average 3.411764705882353) internal successors, (58), 15 states have internal predecessors, (58), 9 states have call successors, (12), 6 states have call predecessors, (12), 5 states have return successors, (6), 3 states have call predecessors, (6), 5 states have call successors, (6) Word has length 29 [2024-11-14 03:12:17,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:12:17,275 INFO L225 Difference]: With dead ends: 186 [2024-11-14 03:12:17,277 INFO L226 Difference]: Without dead ends: 117 [2024-11-14 03:12:17,278 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 47 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=69, Invalid=437, Unknown=0, NotChecked=0, Total=506 [2024-11-14 03:12:17,279 INFO L432 NwaCegarLoop]: 39 mSDtfsCounter, 117 mSDsluCounter, 416 mSDsCounter, 0 mSdLazyCounter, 477 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 121 SdHoareTripleChecker+Valid, 455 SdHoareTripleChecker+Invalid, 512 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 477 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-14 03:12:17,279 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [121 Valid, 455 Invalid, 512 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 477 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-11-14 03:12:17,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2024-11-14 03:12:17,302 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 105. [2024-11-14 03:12:17,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 79 states have (on average 1.1645569620253164) internal successors, (92), 84 states have internal predecessors, (92), 14 states have call successors, (14), 5 states have call predecessors, (14), 8 states have return successors, (32), 15 states have call predecessors, (32), 13 states have call successors, (32) [2024-11-14 03:12:17,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 138 transitions. [2024-11-14 03:12:17,308 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 138 transitions. Word has length 29 [2024-11-14 03:12:17,311 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:12:17,311 INFO L471 AbstractCegarLoop]: Abstraction has 105 states and 138 transitions. [2024-11-14 03:12:17,311 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 17 states have (on average 3.411764705882353) internal successors, (58), 15 states have internal predecessors, (58), 9 states have call successors, (12), 6 states have call predecessors, (12), 5 states have return successors, (6), 3 states have call predecessors, (6), 5 states have call successors, (6) [2024-11-14 03:12:17,311 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 138 transitions. [2024-11-14 03:12:17,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2024-11-14 03:12:17,312 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:12:17,312 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 03:12:17,335 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5904c0b-8133-4829-97b6-30abfab23ef8/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-11-14 03:12:17,513 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5904c0b-8133-4829-97b6-30abfab23ef8/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2024-11-14 03:12:17,513 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting fibo2Err4ASSERT_VIOLATIONINTEGER_OVERFLOW === [fibo2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, fibo2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, fibo2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 9 more)] === [2024-11-14 03:12:17,513 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:12:17,513 INFO L85 PathProgramCache]: Analyzing trace with hash 756028316, now seen corresponding path program 1 times [2024-11-14 03:12:17,514 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:12:17,514 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1921093378] [2024-11-14 03:12:17,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:12:17,514 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:12:17,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:12:17,601 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2024-11-14 03:12:17,601 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:12:17,601 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1921093378] [2024-11-14 03:12:17,601 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1921093378] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 03:12:17,601 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-14 03:12:17,601 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-14 03:12:17,601 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1169672942] [2024-11-14 03:12:17,602 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 03:12:17,602 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-14 03:12:17,602 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:12:17,602 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-14 03:12:17,603 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-14 03:12:17,603 INFO L87 Difference]: Start difference. First operand 105 states and 138 transitions. Second operand has 5 states, 4 states have (on average 4.5) internal successors, (18), 5 states have internal predecessors, (18), 2 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-14 03:12:17,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:12:17,650 INFO L93 Difference]: Finished difference Result 137 states and 188 transitions. [2024-11-14 03:12:17,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-14 03:12:17,651 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 4.5) internal successors, (18), 5 states have internal predecessors, (18), 2 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 30 [2024-11-14 03:12:17,651 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:12:17,652 INFO L225 Difference]: With dead ends: 137 [2024-11-14 03:12:17,652 INFO L226 Difference]: Without dead ends: 135 [2024-11-14 03:12:17,652 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-14 03:12:17,653 INFO L432 NwaCegarLoop]: 36 mSDtfsCounter, 4 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 108 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-14 03:12:17,654 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 108 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-14 03:12:17,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2024-11-14 03:12:17,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 123. [2024-11-14 03:12:17,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123 states, 94 states have (on average 1.1382978723404256) internal successors, (107), 97 states have internal predecessors, (107), 17 states have call successors, (17), 5 states have call predecessors, (17), 8 states have return successors, (40), 20 states have call predecessors, (40), 16 states have call successors, (40) [2024-11-14 03:12:17,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 164 transitions. [2024-11-14 03:12:17,685 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 164 transitions. Word has length 30 [2024-11-14 03:12:17,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:12:17,685 INFO L471 AbstractCegarLoop]: Abstraction has 123 states and 164 transitions. [2024-11-14 03:12:17,685 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 4.5) internal successors, (18), 5 states have internal predecessors, (18), 2 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-14 03:12:17,685 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 164 transitions. [2024-11-14 03:12:17,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2024-11-14 03:12:17,687 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:12:17,687 INFO L215 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 03:12:17,687 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-11-14 03:12:17,687 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting fibo1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW === [fibo2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, fibo2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, fibo2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 9 more)] === [2024-11-14 03:12:17,687 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:12:17,687 INFO L85 PathProgramCache]: Analyzing trace with hash 1010855625, now seen corresponding path program 1 times [2024-11-14 03:12:17,687 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:12:17,687 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [790088464] [2024-11-14 03:12:17,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:12:17,688 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:12:17,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:12:17,814 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2024-11-14 03:12:17,814 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:12:17,814 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [790088464] [2024-11-14 03:12:17,814 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [790088464] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 03:12:17,814 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [701340709] [2024-11-14 03:12:17,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:12:17,814 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:12:17,815 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5904c0b-8133-4829-97b6-30abfab23ef8/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 03:12:17,816 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5904c0b-8133-4829-97b6-30abfab23ef8/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 03:12:17,819 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5904c0b-8133-4829-97b6-30abfab23ef8/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-14 03:12:17,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:12:17,869 INFO L255 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-11-14 03:12:17,871 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 03:12:18,032 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 7 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 03:12:18,035 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 03:12:18,233 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-14 03:12:18,234 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [701340709] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 03:12:18,234 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [49787800] [2024-11-14 03:12:18,238 INFO L159 IcfgInterpreter]: Started Sifa with 23 locations of interest [2024-11-14 03:12:18,239 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 03:12:18,239 FATAL L? ?]: Ignoring exception! java.lang.IllegalArgumentException: Recursive programs are not supported. at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.topsortRelevant(CallGraph.java:132) at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.(CallGraph.java:97) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.(IcfgInterpreter.java:92) at de.uni_freiburg.informatik.ultimate.plugins.sifa.SifaBuilder.construct(SifaBuilder.java:96) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:98) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:68) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:267) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:148) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:137) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:407) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:342) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:324) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:429) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:315) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:276) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:170) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:143) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:167) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:150) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:127) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:233) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:227) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:144) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:106) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:319) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2024-11-14 03:12:18,240 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 03:12:18,244 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 11, 11] total 16 [2024-11-14 03:12:18,244 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1659077218] [2024-11-14 03:12:18,244 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 03:12:18,245 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-11-14 03:12:18,245 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:12:18,245 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-11-14 03:12:18,245 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=205, Unknown=0, NotChecked=0, Total=240 [2024-11-14 03:12:18,246 INFO L87 Difference]: Start difference. First operand 123 states and 164 transitions. Second operand has 16 states, 15 states have (on average 3.466666666666667) internal successors, (52), 13 states have internal predecessors, (52), 7 states have call successors, (10), 5 states have call predecessors, (10), 5 states have return successors, (5), 3 states have call predecessors, (5), 4 states have call successors, (5) [2024-11-14 03:12:18,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:12:18,724 INFO L93 Difference]: Finished difference Result 262 states and 351 transitions. [2024-11-14 03:12:18,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-11-14 03:12:18,725 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 3.466666666666667) internal successors, (52), 13 states have internal predecessors, (52), 7 states have call successors, (10), 5 states have call predecessors, (10), 5 states have return successors, (5), 3 states have call predecessors, (5), 4 states have call successors, (5) Word has length 35 [2024-11-14 03:12:18,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:12:18,726 INFO L225 Difference]: With dead ends: 262 [2024-11-14 03:12:18,726 INFO L226 Difference]: Without dead ends: 153 [2024-11-14 03:12:18,727 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 55 SyntacticMatches, 8 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=57, Invalid=323, Unknown=0, NotChecked=0, Total=380 [2024-11-14 03:12:18,728 INFO L432 NwaCegarLoop]: 48 mSDtfsCounter, 90 mSDsluCounter, 462 mSDsCounter, 0 mSdLazyCounter, 522 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 94 SdHoareTripleChecker+Valid, 510 SdHoareTripleChecker+Invalid, 543 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 522 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-14 03:12:18,728 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [94 Valid, 510 Invalid, 543 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 522 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-11-14 03:12:18,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2024-11-14 03:12:18,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 138. [2024-11-14 03:12:18,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 138 states, 106 states have (on average 1.1415094339622642) internal successors, (121), 109 states have internal predecessors, (121), 19 states have call successors, (19), 6 states have call predecessors, (19), 9 states have return successors, (45), 22 states have call predecessors, (45), 18 states have call successors, (45) [2024-11-14 03:12:18,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 185 transitions. [2024-11-14 03:12:18,745 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 185 transitions. Word has length 35 [2024-11-14 03:12:18,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:12:18,746 INFO L471 AbstractCegarLoop]: Abstraction has 138 states and 185 transitions. [2024-11-14 03:12:18,746 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 3.466666666666667) internal successors, (52), 13 states have internal predecessors, (52), 7 states have call successors, (10), 5 states have call predecessors, (10), 5 states have return successors, (5), 3 states have call predecessors, (5), 4 states have call successors, (5) [2024-11-14 03:12:18,746 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 185 transitions. [2024-11-14 03:12:18,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2024-11-14 03:12:18,747 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:12:18,747 INFO L215 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 03:12:18,769 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5904c0b-8133-4829-97b6-30abfab23ef8/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-11-14 03:12:18,952 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5904c0b-8133-4829-97b6-30abfab23ef8/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2024-11-14 03:12:18,952 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting fibo1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW === [fibo2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, fibo2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, fibo2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 9 more)] === [2024-11-14 03:12:18,952 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:12:18,953 INFO L85 PathProgramCache]: Analyzing trace with hash 805610903, now seen corresponding path program 2 times [2024-11-14 03:12:18,953 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:12:18,953 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1826256644] [2024-11-14 03:12:18,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:12:18,953 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:12:18,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:12:19,041 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2024-11-14 03:12:19,041 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:12:19,041 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1826256644] [2024-11-14 03:12:19,042 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1826256644] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 03:12:19,042 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1103040680] [2024-11-14 03:12:19,042 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-14 03:12:19,042 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:12:19,042 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5904c0b-8133-4829-97b6-30abfab23ef8/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 03:12:19,044 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5904c0b-8133-4829-97b6-30abfab23ef8/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 03:12:19,046 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5904c0b-8133-4829-97b6-30abfab23ef8/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-14 03:12:19,091 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-14 03:12:19,091 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 03:12:19,092 INFO L255 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-11-14 03:12:19,093 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 03:12:19,137 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2024-11-14 03:12:19,137 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-14 03:12:19,137 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1103040680] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 03:12:19,137 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-14 03:12:19,137 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 8 [2024-11-14 03:12:19,137 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [563203151] [2024-11-14 03:12:19,138 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 03:12:19,138 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-14 03:12:19,138 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:12:19,138 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-14 03:12:19,138 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-11-14 03:12:19,139 INFO L87 Difference]: Start difference. First operand 138 states and 185 transitions. Second operand has 5 states, 4 states have (on average 5.0) internal successors, (20), 5 states have internal predecessors, (20), 2 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-14 03:12:19,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:12:19,178 INFO L93 Difference]: Finished difference Result 145 states and 195 transitions. [2024-11-14 03:12:19,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-14 03:12:19,179 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 5.0) internal successors, (20), 5 states have internal predecessors, (20), 2 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 35 [2024-11-14 03:12:19,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:12:19,180 INFO L225 Difference]: With dead ends: 145 [2024-11-14 03:12:19,180 INFO L226 Difference]: Without dead ends: 144 [2024-11-14 03:12:19,181 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-11-14 03:12:19,181 INFO L432 NwaCegarLoop]: 35 mSDtfsCounter, 4 mSDsluCounter, 66 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 101 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-14 03:12:19,181 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 101 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-14 03:12:19,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2024-11-14 03:12:19,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 142. [2024-11-14 03:12:19,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 142 states, 110 states have (on average 1.1363636363636365) internal successors, (125), 111 states have internal predecessors, (125), 19 states have call successors, (19), 6 states have call predecessors, (19), 9 states have return successors, (45), 24 states have call predecessors, (45), 18 states have call successors, (45) [2024-11-14 03:12:19,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 189 transitions. [2024-11-14 03:12:19,197 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 189 transitions. Word has length 35 [2024-11-14 03:12:19,197 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:12:19,197 INFO L471 AbstractCegarLoop]: Abstraction has 142 states and 189 transitions. [2024-11-14 03:12:19,197 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 5.0) internal successors, (20), 5 states have internal predecessors, (20), 2 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-14 03:12:19,197 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 189 transitions. [2024-11-14 03:12:19,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2024-11-14 03:12:19,198 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:12:19,198 INFO L215 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 03:12:19,219 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5904c0b-8133-4829-97b6-30abfab23ef8/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-11-14 03:12:19,399 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5904c0b-8133-4829-97b6-30abfab23ef8/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2024-11-14 03:12:19,399 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting fibo1Err5ASSERT_VIOLATIONINTEGER_OVERFLOW === [fibo2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, fibo2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, fibo2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 9 more)] === [2024-11-14 03:12:19,399 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:12:19,400 INFO L85 PathProgramCache]: Analyzing trace with hash -795865684, now seen corresponding path program 1 times [2024-11-14 03:12:19,400 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:12:19,400 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2095007342] [2024-11-14 03:12:19,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:12:19,400 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:12:19,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:12:19,504 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2024-11-14 03:12:19,504 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:12:19,504 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2095007342] [2024-11-14 03:12:19,505 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2095007342] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 03:12:19,505 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1002497358] [2024-11-14 03:12:19,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:12:19,505 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:12:19,505 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5904c0b-8133-4829-97b6-30abfab23ef8/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 03:12:19,508 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5904c0b-8133-4829-97b6-30abfab23ef8/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 03:12:19,513 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5904c0b-8133-4829-97b6-30abfab23ef8/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-14 03:12:19,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:12:19,564 INFO L255 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-11-14 03:12:19,566 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 03:12:19,636 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2024-11-14 03:12:19,637 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-14 03:12:19,637 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1002497358] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 03:12:19,637 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-14 03:12:19,637 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 9 [2024-11-14 03:12:19,637 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [139558635] [2024-11-14 03:12:19,637 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 03:12:19,638 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-14 03:12:19,638 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:12:19,639 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-14 03:12:19,639 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-11-14 03:12:19,639 INFO L87 Difference]: Start difference. First operand 142 states and 189 transitions. Second operand has 6 states, 5 states have (on average 4.2) internal successors, (21), 6 states have internal predecessors, (21), 2 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-14 03:12:19,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:12:19,690 INFO L93 Difference]: Finished difference Result 158 states and 210 transitions. [2024-11-14 03:12:19,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-14 03:12:19,690 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 4.2) internal successors, (21), 6 states have internal predecessors, (21), 2 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 36 [2024-11-14 03:12:19,691 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:12:19,693 INFO L225 Difference]: With dead ends: 158 [2024-11-14 03:12:19,694 INFO L226 Difference]: Without dead ends: 157 [2024-11-14 03:12:19,695 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-11-14 03:12:19,695 INFO L432 NwaCegarLoop]: 37 mSDtfsCounter, 2 mSDsluCounter, 106 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 143 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-14 03:12:19,696 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 143 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-14 03:12:19,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2024-11-14 03:12:19,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 138. [2024-11-14 03:12:19,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 138 states, 107 states have (on average 1.1401869158878504) internal successors, (122), 108 states have internal predecessors, (122), 18 states have call successors, (18), 6 states have call predecessors, (18), 9 states have return successors, (42), 23 states have call predecessors, (42), 17 states have call successors, (42) [2024-11-14 03:12:19,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 182 transitions. [2024-11-14 03:12:19,710 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 182 transitions. Word has length 36 [2024-11-14 03:12:19,711 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:12:19,711 INFO L471 AbstractCegarLoop]: Abstraction has 138 states and 182 transitions. [2024-11-14 03:12:19,711 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 4.2) internal successors, (21), 6 states have internal predecessors, (21), 2 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-14 03:12:19,711 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 182 transitions. [2024-11-14 03:12:19,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2024-11-14 03:12:19,712 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:12:19,712 INFO L215 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1] [2024-11-14 03:12:19,731 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5904c0b-8133-4829-97b6-30abfab23ef8/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2024-11-14 03:12:19,914 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5904c0b-8133-4829-97b6-30abfab23ef8/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2024-11-14 03:12:19,915 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting fibo2Err4ASSERT_VIOLATIONINTEGER_OVERFLOW === [fibo2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, fibo2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, fibo2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 9 more)] === [2024-11-14 03:12:19,915 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:12:19,915 INFO L85 PathProgramCache]: Analyzing trace with hash 384303207, now seen corresponding path program 1 times [2024-11-14 03:12:19,915 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:12:19,915 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1561144479] [2024-11-14 03:12:19,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:12:19,915 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:12:19,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:12:20,017 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-11-14 03:12:20,017 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:12:20,017 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1561144479] [2024-11-14 03:12:20,017 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1561144479] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 03:12:20,017 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1978990170] [2024-11-14 03:12:20,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:12:20,018 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:12:20,018 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5904c0b-8133-4829-97b6-30abfab23ef8/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 03:12:20,020 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5904c0b-8133-4829-97b6-30abfab23ef8/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 03:12:20,023 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5904c0b-8133-4829-97b6-30abfab23ef8/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-14 03:12:20,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:12:20,076 INFO L255 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-11-14 03:12:20,078 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 03:12:20,219 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 25 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-14 03:12:20,220 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 03:12:20,372 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 15 proven. 13 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-14 03:12:20,373 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1978990170] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 03:12:20,373 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1503889475] [2024-11-14 03:12:20,375 INFO L159 IcfgInterpreter]: Started Sifa with 29 locations of interest [2024-11-14 03:12:20,375 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 03:12:20,375 FATAL L? ?]: Ignoring exception! java.lang.IllegalArgumentException: Recursive programs are not supported. at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.topsortRelevant(CallGraph.java:132) at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.(CallGraph.java:97) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.(IcfgInterpreter.java:92) at de.uni_freiburg.informatik.ultimate.plugins.sifa.SifaBuilder.construct(SifaBuilder.java:96) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:98) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:68) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:267) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:148) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:137) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:407) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:342) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:324) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:429) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:315) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:276) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:170) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:143) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:167) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:150) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:127) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:233) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:227) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:144) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:106) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:319) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2024-11-14 03:12:20,376 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 03:12:20,376 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 11, 11] total 15 [2024-11-14 03:12:20,377 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [85360571] [2024-11-14 03:12:20,377 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 03:12:20,377 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-11-14 03:12:20,377 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:12:20,378 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-11-14 03:12:20,378 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=178, Unknown=0, NotChecked=0, Total=210 [2024-11-14 03:12:20,378 INFO L87 Difference]: Start difference. First operand 138 states and 182 transitions. Second operand has 15 states, 14 states have (on average 4.428571428571429) internal successors, (62), 11 states have internal predecessors, (62), 7 states have call successors, (14), 6 states have call predecessors, (14), 4 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) [2024-11-14 03:12:20,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:12:20,838 INFO L93 Difference]: Finished difference Result 268 states and 367 transitions. [2024-11-14 03:12:20,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-11-14 03:12:20,839 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 4.428571428571429) internal successors, (62), 11 states have internal predecessors, (62), 7 states have call successors, (14), 6 states have call predecessors, (14), 4 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) Word has length 50 [2024-11-14 03:12:20,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:12:20,841 INFO L225 Difference]: With dead ends: 268 [2024-11-14 03:12:20,841 INFO L226 Difference]: Without dead ends: 154 [2024-11-14 03:12:20,843 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 84 SyntacticMatches, 9 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=78, Invalid=428, Unknown=0, NotChecked=0, Total=506 [2024-11-14 03:12:20,843 INFO L432 NwaCegarLoop]: 22 mSDtfsCounter, 78 mSDsluCounter, 230 mSDsCounter, 0 mSdLazyCounter, 544 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 252 SdHoareTripleChecker+Invalid, 570 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 544 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-14 03:12:20,844 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [78 Valid, 252 Invalid, 570 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 544 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-14 03:12:20,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2024-11-14 03:12:20,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 134. [2024-11-14 03:12:20,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134 states, 103 states have (on average 1.1262135922330097) internal successors, (116), 106 states have internal predecessors, (116), 17 states have call successors, (17), 7 states have call predecessors, (17), 10 states have return successors, (31), 20 states have call predecessors, (31), 16 states have call successors, (31) [2024-11-14 03:12:20,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 164 transitions. [2024-11-14 03:12:20,859 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 164 transitions. Word has length 50 [2024-11-14 03:12:20,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:12:20,859 INFO L471 AbstractCegarLoop]: Abstraction has 134 states and 164 transitions. [2024-11-14 03:12:20,860 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 4.428571428571429) internal successors, (62), 11 states have internal predecessors, (62), 7 states have call successors, (14), 6 states have call predecessors, (14), 4 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) [2024-11-14 03:12:20,860 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 164 transitions. [2024-11-14 03:12:20,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2024-11-14 03:12:20,861 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:12:20,861 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 03:12:20,881 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5904c0b-8133-4829-97b6-30abfab23ef8/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-11-14 03:12:21,065 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5904c0b-8133-4829-97b6-30abfab23ef8/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2024-11-14 03:12:21,066 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting fibo2Err4ASSERT_VIOLATIONINTEGER_OVERFLOW === [fibo2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, fibo2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, fibo2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 9 more)] === [2024-11-14 03:12:21,067 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:12:21,067 INFO L85 PathProgramCache]: Analyzing trace with hash 137442814, now seen corresponding path program 1 times [2024-11-14 03:12:21,067 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:12:21,067 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1635231152] [2024-11-14 03:12:21,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:12:21,067 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:12:21,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:12:21,153 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2024-11-14 03:12:21,153 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:12:21,153 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1635231152] [2024-11-14 03:12:21,153 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1635231152] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 03:12:21,153 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-14 03:12:21,153 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-14 03:12:21,153 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1003518356] [2024-11-14 03:12:21,153 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 03:12:21,154 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-14 03:12:21,154 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:12:21,154 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-14 03:12:21,154 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-14 03:12:21,155 INFO L87 Difference]: Start difference. First operand 134 states and 164 transitions. Second operand has 5 states, 4 states have (on average 7.0) internal successors, (28), 5 states have internal predecessors, (28), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-11-14 03:12:21,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:12:21,203 INFO L93 Difference]: Finished difference Result 151 states and 186 transitions. [2024-11-14 03:12:21,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-14 03:12:21,204 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 7.0) internal successors, (28), 5 states have internal predecessors, (28), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 49 [2024-11-14 03:12:21,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:12:21,205 INFO L225 Difference]: With dead ends: 151 [2024-11-14 03:12:21,205 INFO L226 Difference]: Without dead ends: 150 [2024-11-14 03:12:21,206 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-14 03:12:21,206 INFO L432 NwaCegarLoop]: 40 mSDtfsCounter, 3 mSDsluCounter, 104 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 144 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-14 03:12:21,206 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 144 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-14 03:12:21,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2024-11-14 03:12:21,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 140. [2024-11-14 03:12:21,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 140 states, 109 states have (on average 1.1192660550458715) internal successors, (122), 109 states have internal predecessors, (122), 17 states have call successors, (17), 7 states have call predecessors, (17), 10 states have return successors, (31), 23 states have call predecessors, (31), 16 states have call successors, (31) [2024-11-14 03:12:21,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 170 transitions. [2024-11-14 03:12:21,224 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 170 transitions. Word has length 49 [2024-11-14 03:12:21,224 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:12:21,224 INFO L471 AbstractCegarLoop]: Abstraction has 140 states and 170 transitions. [2024-11-14 03:12:21,224 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 7.0) internal successors, (28), 5 states have internal predecessors, (28), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-11-14 03:12:21,224 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 170 transitions. [2024-11-14 03:12:21,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2024-11-14 03:12:21,226 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:12:21,227 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 03:12:21,227 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-11-14 03:12:21,227 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting fibo2Err5ASSERT_VIOLATIONINTEGER_OVERFLOW === [fibo2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, fibo2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, fibo2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 9 more)] === [2024-11-14 03:12:21,228 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:12:21,228 INFO L85 PathProgramCache]: Analyzing trace with hash -34239989, now seen corresponding path program 1 times [2024-11-14 03:12:21,228 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:12:21,228 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [893191538] [2024-11-14 03:12:21,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:12:21,228 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:12:21,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:12:21,425 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2024-11-14 03:12:21,425 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:12:21,425 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [893191538] [2024-11-14 03:12:21,425 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [893191538] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 03:12:21,425 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1837667379] [2024-11-14 03:12:21,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:12:21,426 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:12:21,426 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5904c0b-8133-4829-97b6-30abfab23ef8/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 03:12:21,428 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5904c0b-8133-4829-97b6-30abfab23ef8/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 03:12:21,430 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5904c0b-8133-4829-97b6-30abfab23ef8/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-14 03:12:21,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:12:21,482 INFO L255 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-11-14 03:12:21,485 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 03:12:21,602 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2024-11-14 03:12:21,602 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-14 03:12:21,603 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1837667379] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 03:12:21,603 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-14 03:12:21,603 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [9] total 14 [2024-11-14 03:12:21,603 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1274420095] [2024-11-14 03:12:21,603 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 03:12:21,603 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-11-14 03:12:21,603 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:12:21,604 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-11-14 03:12:21,604 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2024-11-14 03:12:21,604 INFO L87 Difference]: Start difference. First operand 140 states and 170 transitions. Second operand has 9 states, 8 states have (on average 3.625) internal successors, (29), 9 states have internal predecessors, (29), 3 states have call successors, (5), 1 states have call predecessors, (5), 3 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2024-11-14 03:12:21,688 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:12:21,688 INFO L93 Difference]: Finished difference Result 181 states and 239 transitions. [2024-11-14 03:12:21,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-14 03:12:21,688 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 3.625) internal successors, (29), 9 states have internal predecessors, (29), 3 states have call successors, (5), 1 states have call predecessors, (5), 3 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) Word has length 50 [2024-11-14 03:12:21,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:12:21,690 INFO L225 Difference]: With dead ends: 181 [2024-11-14 03:12:21,690 INFO L226 Difference]: Without dead ends: 180 [2024-11-14 03:12:21,690 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2024-11-14 03:12:21,691 INFO L432 NwaCegarLoop]: 33 mSDtfsCounter, 2 mSDsluCounter, 157 mSDsCounter, 0 mSdLazyCounter, 78 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 190 SdHoareTripleChecker+Invalid, 79 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 78 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-14 03:12:21,691 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 190 Invalid, 79 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 78 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-14 03:12:21,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2024-11-14 03:12:21,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 165. [2024-11-14 03:12:21,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 165 states, 129 states have (on average 1.124031007751938) internal successors, (145), 127 states have internal predecessors, (145), 20 states have call successors, (20), 7 states have call predecessors, (20), 12 states have return successors, (50), 30 states have call predecessors, (50), 19 states have call successors, (50) [2024-11-14 03:12:21,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 215 transitions. [2024-11-14 03:12:21,710 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 215 transitions. Word has length 50 [2024-11-14 03:12:21,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:12:21,710 INFO L471 AbstractCegarLoop]: Abstraction has 165 states and 215 transitions. [2024-11-14 03:12:21,710 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 3.625) internal successors, (29), 9 states have internal predecessors, (29), 3 states have call successors, (5), 1 states have call predecessors, (5), 3 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2024-11-14 03:12:21,710 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 215 transitions. [2024-11-14 03:12:21,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2024-11-14 03:12:21,711 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:12:21,712 INFO L215 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 03:12:21,731 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5904c0b-8133-4829-97b6-30abfab23ef8/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-11-14 03:12:21,915 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5904c0b-8133-4829-97b6-30abfab23ef8/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2024-11-14 03:12:21,916 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting fibo2Err4ASSERT_VIOLATIONINTEGER_OVERFLOW === [fibo2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, fibo2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, fibo2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 9 more)] === [2024-11-14 03:12:21,916 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:12:21,917 INFO L85 PathProgramCache]: Analyzing trace with hash -1672028690, now seen corresponding path program 1 times [2024-11-14 03:12:21,917 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:12:21,917 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1853964640] [2024-11-14 03:12:21,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:12:21,917 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:12:21,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:12:22,019 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2024-11-14 03:12:22,020 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:12:22,020 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1853964640] [2024-11-14 03:12:22,020 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1853964640] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 03:12:22,020 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [541810345] [2024-11-14 03:12:22,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:12:22,020 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:12:22,020 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5904c0b-8133-4829-97b6-30abfab23ef8/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 03:12:22,022 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5904c0b-8133-4829-97b6-30abfab23ef8/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 03:12:22,025 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5904c0b-8133-4829-97b6-30abfab23ef8/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-14 03:12:22,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:12:22,081 INFO L255 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-11-14 03:12:22,083 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 03:12:22,246 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 64 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-11-14 03:12:22,247 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-14 03:12:22,247 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [541810345] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 03:12:22,247 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-14 03:12:22,247 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [4] total 16 [2024-11-14 03:12:22,247 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [879695102] [2024-11-14 03:12:22,247 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 03:12:22,248 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-11-14 03:12:22,248 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:12:22,248 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-11-14 03:12:22,248 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=202, Unknown=0, NotChecked=0, Total=240 [2024-11-14 03:12:22,249 INFO L87 Difference]: Start difference. First operand 165 states and 215 transitions. Second operand has 13 states, 12 states have (on average 4.0) internal successors, (48), 7 states have internal predecessors, (48), 6 states have call successors, (9), 6 states have call predecessors, (9), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2024-11-14 03:12:22,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:12:22,536 INFO L93 Difference]: Finished difference Result 282 states and 372 transitions. [2024-11-14 03:12:22,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-11-14 03:12:22,537 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 4.0) internal successors, (48), 7 states have internal predecessors, (48), 6 states have call successors, (9), 6 states have call predecessors, (9), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 71 [2024-11-14 03:12:22,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:12:22,538 INFO L225 Difference]: With dead ends: 282 [2024-11-14 03:12:22,538 INFO L226 Difference]: Without dead ends: 155 [2024-11-14 03:12:22,539 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=70, Invalid=350, Unknown=0, NotChecked=0, Total=420 [2024-11-14 03:12:22,539 INFO L432 NwaCegarLoop]: 27 mSDtfsCounter, 111 mSDsluCounter, 183 mSDsCounter, 0 mSdLazyCounter, 304 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 111 SdHoareTripleChecker+Valid, 210 SdHoareTripleChecker+Invalid, 333 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 304 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-14 03:12:22,539 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [111 Valid, 210 Invalid, 333 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 304 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-14 03:12:22,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2024-11-14 03:12:22,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 154. [2024-11-14 03:12:22,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 154 states, 119 states have (on average 1.1092436974789917) internal successors, (132), 120 states have internal predecessors, (132), 18 states have call successors, (18), 8 states have call predecessors, (18), 13 states have return successors, (36), 25 states have call predecessors, (36), 17 states have call successors, (36) [2024-11-14 03:12:22,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 186 transitions. [2024-11-14 03:12:22,552 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 186 transitions. Word has length 71 [2024-11-14 03:12:22,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:12:22,552 INFO L471 AbstractCegarLoop]: Abstraction has 154 states and 186 transitions. [2024-11-14 03:12:22,552 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 4.0) internal successors, (48), 7 states have internal predecessors, (48), 6 states have call successors, (9), 6 states have call predecessors, (9), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2024-11-14 03:12:22,553 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 186 transitions. [2024-11-14 03:12:22,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2024-11-14 03:12:22,553 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:12:22,553 INFO L215 NwaCegarLoop]: trace histogram [4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 03:12:22,573 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5904c0b-8133-4829-97b6-30abfab23ef8/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2024-11-14 03:12:22,754 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5904c0b-8133-4829-97b6-30abfab23ef8/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2024-11-14 03:12:22,754 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting fibo1Err5ASSERT_VIOLATIONINTEGER_OVERFLOW === [fibo2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, fibo2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, fibo2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 9 more)] === [2024-11-14 03:12:22,754 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:12:22,754 INFO L85 PathProgramCache]: Analyzing trace with hash 101891713, now seen corresponding path program 1 times [2024-11-14 03:12:22,754 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:12:22,755 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1795555632] [2024-11-14 03:12:22,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:12:22,755 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:12:22,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:12:22,830 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2024-11-14 03:12:22,831 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:12:22,831 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1795555632] [2024-11-14 03:12:22,831 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1795555632] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 03:12:22,831 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-14 03:12:22,832 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-14 03:12:22,832 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1051957509] [2024-11-14 03:12:22,832 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 03:12:22,832 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-14 03:12:22,832 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:12:22,833 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-14 03:12:22,833 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-14 03:12:22,833 INFO L87 Difference]: Start difference. First operand 154 states and 186 transitions. Second operand has 5 states, 4 states have (on average 7.0) internal successors, (28), 5 states have internal predecessors, (28), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-11-14 03:12:22,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:12:22,874 INFO L93 Difference]: Finished difference Result 156 states and 187 transitions. [2024-11-14 03:12:22,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-14 03:12:22,874 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 7.0) internal successors, (28), 5 states have internal predecessors, (28), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 54 [2024-11-14 03:12:22,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:12:22,876 INFO L225 Difference]: With dead ends: 156 [2024-11-14 03:12:22,876 INFO L226 Difference]: Without dead ends: 155 [2024-11-14 03:12:22,877 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-14 03:12:22,877 INFO L432 NwaCegarLoop]: 37 mSDtfsCounter, 2 mSDsluCounter, 100 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 137 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-14 03:12:22,878 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 137 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-14 03:12:22,879 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2024-11-14 03:12:22,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 154. [2024-11-14 03:12:22,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 154 states, 119 states have (on average 1.0924369747899159) internal successors, (130), 120 states have internal predecessors, (130), 18 states have call successors, (18), 8 states have call predecessors, (18), 13 states have return successors, (36), 25 states have call predecessors, (36), 17 states have call successors, (36) [2024-11-14 03:12:22,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 184 transitions. [2024-11-14 03:12:22,895 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 184 transitions. Word has length 54 [2024-11-14 03:12:22,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:12:22,895 INFO L471 AbstractCegarLoop]: Abstraction has 154 states and 184 transitions. [2024-11-14 03:12:22,896 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 7.0) internal successors, (28), 5 states have internal predecessors, (28), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-11-14 03:12:22,896 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 184 transitions. [2024-11-14 03:12:22,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2024-11-14 03:12:22,897 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:12:22,897 INFO L215 NwaCegarLoop]: trace histogram [5, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 03:12:22,898 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-11-14 03:12:22,898 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting fibo2Err4ASSERT_VIOLATIONINTEGER_OVERFLOW === [fibo2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, fibo2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, fibo2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 9 more)] === [2024-11-14 03:12:22,898 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:12:22,898 INFO L85 PathProgramCache]: Analyzing trace with hash 118598073, now seen corresponding path program 1 times [2024-11-14 03:12:22,898 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:12:22,898 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1721515023] [2024-11-14 03:12:22,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:12:22,899 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:12:22,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:12:23,137 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 14 proven. 21 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-11-14 03:12:23,137 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:12:23,137 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1721515023] [2024-11-14 03:12:23,138 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1721515023] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 03:12:23,138 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [361366058] [2024-11-14 03:12:23,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:12:23,138 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:12:23,138 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5904c0b-8133-4829-97b6-30abfab23ef8/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 03:12:23,140 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5904c0b-8133-4829-97b6-30abfab23ef8/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 03:12:23,142 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5904c0b-8133-4829-97b6-30abfab23ef8/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-11-14 03:12:23,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:12:23,200 INFO L255 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-14 03:12:23,203 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 03:12:23,348 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2024-11-14 03:12:23,349 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 03:12:23,639 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2024-11-14 03:12:23,639 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [361366058] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 03:12:23,639 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1543210715] [2024-11-14 03:12:23,641 INFO L159 IcfgInterpreter]: Started Sifa with 32 locations of interest [2024-11-14 03:12:23,642 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 03:12:23,642 FATAL L? ?]: Ignoring exception! java.lang.IllegalArgumentException: Recursive programs are not supported. at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.topsortRelevant(CallGraph.java:132) at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.(CallGraph.java:97) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.(IcfgInterpreter.java:92) at de.uni_freiburg.informatik.ultimate.plugins.sifa.SifaBuilder.construct(SifaBuilder.java:96) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:98) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:68) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:267) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:148) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:137) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:407) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:342) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:324) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:429) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:315) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:276) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:170) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:143) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:167) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:150) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:127) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:233) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:227) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:144) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:106) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:319) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2024-11-14 03:12:23,643 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 03:12:23,643 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8, 7] total 23 [2024-11-14 03:12:23,643 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1329804963] [2024-11-14 03:12:23,643 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 03:12:23,644 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-11-14 03:12:23,644 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:12:23,644 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-11-14 03:12:23,645 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=449, Unknown=0, NotChecked=0, Total=506 [2024-11-14 03:12:23,645 INFO L87 Difference]: Start difference. First operand 154 states and 184 transitions. Second operand has 23 states, 22 states have (on average 3.5454545454545454) internal successors, (78), 21 states have internal predecessors, (78), 9 states have call successors, (14), 3 states have call predecessors, (14), 6 states have return successors, (14), 11 states have call predecessors, (14), 7 states have call successors, (14) [2024-11-14 03:12:24,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:12:24,379 INFO L93 Difference]: Finished difference Result 272 states and 333 transitions. [2024-11-14 03:12:24,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2024-11-14 03:12:24,380 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 22 states have (on average 3.5454545454545454) internal successors, (78), 21 states have internal predecessors, (78), 9 states have call successors, (14), 3 states have call predecessors, (14), 6 states have return successors, (14), 11 states have call predecessors, (14), 7 states have call successors, (14) Word has length 67 [2024-11-14 03:12:24,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:12:24,381 INFO L225 Difference]: With dead ends: 272 [2024-11-14 03:12:24,381 INFO L226 Difference]: Without dead ends: 168 [2024-11-14 03:12:24,383 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 124 SyntacticMatches, 2 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 271 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=232, Invalid=1490, Unknown=0, NotChecked=0, Total=1722 [2024-11-14 03:12:24,383 INFO L432 NwaCegarLoop]: 14 mSDtfsCounter, 137 mSDsluCounter, 172 mSDsCounter, 0 mSdLazyCounter, 531 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 137 SdHoareTripleChecker+Valid, 186 SdHoareTripleChecker+Invalid, 581 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 531 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-14 03:12:24,384 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [137 Valid, 186 Invalid, 581 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 531 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-11-14 03:12:24,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2024-11-14 03:12:24,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 144. [2024-11-14 03:12:24,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 144 states, 110 states have (on average 1.0727272727272728) internal successors, (118), 114 states have internal predecessors, (118), 17 states have call successors, (17), 8 states have call predecessors, (17), 13 states have return successors, (24), 21 states have call predecessors, (24), 16 states have call successors, (24) [2024-11-14 03:12:24,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 159 transitions. [2024-11-14 03:12:24,396 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 159 transitions. Word has length 67 [2024-11-14 03:12:24,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:12:24,396 INFO L471 AbstractCegarLoop]: Abstraction has 144 states and 159 transitions. [2024-11-14 03:12:24,397 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 22 states have (on average 3.5454545454545454) internal successors, (78), 21 states have internal predecessors, (78), 9 states have call successors, (14), 3 states have call predecessors, (14), 6 states have return successors, (14), 11 states have call predecessors, (14), 7 states have call successors, (14) [2024-11-14 03:12:24,397 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 159 transitions. [2024-11-14 03:12:24,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2024-11-14 03:12:24,398 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:12:24,398 INFO L215 NwaCegarLoop]: trace histogram [5, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 03:12:24,418 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5904c0b-8133-4829-97b6-30abfab23ef8/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2024-11-14 03:12:24,599 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5904c0b-8133-4829-97b6-30abfab23ef8/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:12:24,599 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting fibo2Err5ASSERT_VIOLATIONINTEGER_OVERFLOW === [fibo2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, fibo2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, fibo2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 9 more)] === [2024-11-14 03:12:24,600 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:12:24,600 INFO L85 PathProgramCache]: Analyzing trace with hash 76784160, now seen corresponding path program 1 times [2024-11-14 03:12:24,600 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:12:24,600 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [892780557] [2024-11-14 03:12:24,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:12:24,600 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:12:24,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:12:24,816 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 11 proven. 30 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-11-14 03:12:24,816 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:12:24,816 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [892780557] [2024-11-14 03:12:24,816 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [892780557] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 03:12:24,816 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [281870167] [2024-11-14 03:12:24,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:12:24,816 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:12:24,817 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5904c0b-8133-4829-97b6-30abfab23ef8/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 03:12:24,818 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5904c0b-8133-4829-97b6-30abfab23ef8/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 03:12:24,820 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5904c0b-8133-4829-97b6-30abfab23ef8/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-11-14 03:12:24,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:12:24,906 INFO L255 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 13 conjuncts are in the unsatisfiable core [2024-11-14 03:12:24,908 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 03:12:25,116 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2024-11-14 03:12:25,116 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 03:12:25,693 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 8 proven. 7 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2024-11-14 03:12:25,695 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [281870167] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 03:12:25,695 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1900158961] [2024-11-14 03:12:25,701 INFO L159 IcfgInterpreter]: Started Sifa with 33 locations of interest [2024-11-14 03:12:25,701 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 03:12:25,702 FATAL L? ?]: Ignoring exception! java.lang.IllegalArgumentException: Recursive programs are not supported. at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.topsortRelevant(CallGraph.java:132) at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.(CallGraph.java:97) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.(IcfgInterpreter.java:92) at de.uni_freiburg.informatik.ultimate.plugins.sifa.SifaBuilder.construct(SifaBuilder.java:96) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:98) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:68) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:267) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:148) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:137) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:407) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:342) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:324) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:429) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:315) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:276) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:170) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:143) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:167) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:150) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:127) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:233) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:227) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:144) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:106) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:319) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2024-11-14 03:12:25,702 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 03:12:25,702 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 9, 11] total 28 [2024-11-14 03:12:25,702 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1417701727] [2024-11-14 03:12:25,702 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 03:12:25,703 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2024-11-14 03:12:25,703 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:12:25,703 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2024-11-14 03:12:25,704 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=680, Unknown=0, NotChecked=0, Total=756 [2024-11-14 03:12:25,704 INFO L87 Difference]: Start difference. First operand 144 states and 159 transitions. Second operand has 28 states, 27 states have (on average 3.5555555555555554) internal successors, (96), 26 states have internal predecessors, (96), 12 states have call successors, (15), 3 states have call predecessors, (15), 8 states have return successors, (16), 14 states have call predecessors, (16), 10 states have call successors, (16) [2024-11-14 03:12:26,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:12:26,799 INFO L93 Difference]: Finished difference Result 251 states and 276 transitions. [2024-11-14 03:12:26,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2024-11-14 03:12:26,799 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 27 states have (on average 3.5555555555555554) internal successors, (96), 26 states have internal predecessors, (96), 12 states have call successors, (15), 3 states have call predecessors, (15), 8 states have return successors, (16), 14 states have call predecessors, (16), 10 states have call successors, (16) Word has length 68 [2024-11-14 03:12:26,800 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:12:26,801 INFO L225 Difference]: With dead ends: 251 [2024-11-14 03:12:26,801 INFO L226 Difference]: Without dead ends: 118 [2024-11-14 03:12:26,803 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 180 GetRequests, 125 SyntacticMatches, 3 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 516 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=360, Invalid=2502, Unknown=0, NotChecked=0, Total=2862 [2024-11-14 03:12:26,804 INFO L432 NwaCegarLoop]: 16 mSDtfsCounter, 90 mSDsluCounter, 227 mSDsCounter, 0 mSdLazyCounter, 777 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 243 SdHoareTripleChecker+Invalid, 809 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 777 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-11-14 03:12:26,804 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [90 Valid, 243 Invalid, 809 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 777 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-11-14 03:12:26,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2024-11-14 03:12:26,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 92. [2024-11-14 03:12:26,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 70 states have (on average 1.0571428571428572) internal successors, (74), 74 states have internal predecessors, (74), 11 states have call successors, (11), 7 states have call predecessors, (11), 9 states have return successors, (13), 10 states have call predecessors, (13), 10 states have call successors, (13) [2024-11-14 03:12:26,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 98 transitions. [2024-11-14 03:12:26,819 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 98 transitions. Word has length 68 [2024-11-14 03:12:26,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:12:26,819 INFO L471 AbstractCegarLoop]: Abstraction has 92 states and 98 transitions. [2024-11-14 03:12:26,819 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 27 states have (on average 3.5555555555555554) internal successors, (96), 26 states have internal predecessors, (96), 12 states have call successors, (15), 3 states have call predecessors, (15), 8 states have return successors, (16), 14 states have call predecessors, (16), 10 states have call successors, (16) [2024-11-14 03:12:26,819 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 98 transitions. [2024-11-14 03:12:26,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2024-11-14 03:12:26,824 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:12:26,824 INFO L215 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 03:12:26,844 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5904c0b-8133-4829-97b6-30abfab23ef8/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2024-11-14 03:12:27,028 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5904c0b-8133-4829-97b6-30abfab23ef8/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:12:27,029 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting fibo1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW === [fibo2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, fibo2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, fibo2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 9 more)] === [2024-11-14 03:12:27,029 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:12:27,030 INFO L85 PathProgramCache]: Analyzing trace with hash -538545639, now seen corresponding path program 1 times [2024-11-14 03:12:27,030 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:12:27,030 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [433984092] [2024-11-14 03:12:27,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:12:27,030 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:12:27,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:12:27,398 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 8 proven. 27 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2024-11-14 03:12:27,399 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:12:27,399 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [433984092] [2024-11-14 03:12:27,399 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [433984092] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 03:12:27,399 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1572494436] [2024-11-14 03:12:27,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:12:27,399 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:12:27,399 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5904c0b-8133-4829-97b6-30abfab23ef8/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 03:12:27,401 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5904c0b-8133-4829-97b6-30abfab23ef8/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 03:12:27,406 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5904c0b-8133-4829-97b6-30abfab23ef8/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-11-14 03:12:27,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:12:27,473 INFO L255 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-11-14 03:12:27,475 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 03:12:27,711 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 8 proven. 19 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2024-11-14 03:12:27,711 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 03:12:28,411 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 16 proven. 19 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2024-11-14 03:12:28,411 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1572494436] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 03:12:28,411 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [534507368] [2024-11-14 03:12:28,413 INFO L159 IcfgInterpreter]: Started Sifa with 33 locations of interest [2024-11-14 03:12:28,413 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 03:12:28,414 FATAL L? ?]: Ignoring exception! java.lang.IllegalArgumentException: Recursive programs are not supported. at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.topsortRelevant(CallGraph.java:132) at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.(CallGraph.java:97) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.(IcfgInterpreter.java:92) at de.uni_freiburg.informatik.ultimate.plugins.sifa.SifaBuilder.construct(SifaBuilder.java:96) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:98) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:68) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:267) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:148) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:137) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:407) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:342) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:324) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:429) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:315) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:276) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:170) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:143) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:167) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:150) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:127) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:233) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:227) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:144) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:106) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:319) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2024-11-14 03:12:28,415 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 03:12:28,415 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 13, 15] total 33 [2024-11-14 03:12:28,415 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [950126851] [2024-11-14 03:12:28,415 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 03:12:28,416 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2024-11-14 03:12:28,416 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:12:28,417 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2024-11-14 03:12:28,417 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=146, Invalid=976, Unknown=0, NotChecked=0, Total=1122 [2024-11-14 03:12:28,417 INFO L87 Difference]: Start difference. First operand 92 states and 98 transitions. Second operand has 34 states, 33 states have (on average 2.727272727272727) internal successors, (90), 34 states have internal predecessors, (90), 9 states have call successors, (11), 1 states have call predecessors, (11), 13 states have return successors, (19), 18 states have call predecessors, (19), 9 states have call successors, (19) [2024-11-14 03:12:28,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:12:28,743 INFO L93 Difference]: Finished difference Result 126 states and 137 transitions. [2024-11-14 03:12:28,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2024-11-14 03:12:28,744 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 2.727272727272727) internal successors, (90), 34 states have internal predecessors, (90), 9 states have call successors, (11), 1 states have call predecessors, (11), 13 states have return successors, (19), 18 states have call predecessors, (19), 9 states have call successors, (19) Word has length 82 [2024-11-14 03:12:28,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:12:28,745 INFO L225 Difference]: With dead ends: 126 [2024-11-14 03:12:28,745 INFO L226 Difference]: Without dead ends: 125 [2024-11-14 03:12:28,746 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 142 SyntacticMatches, 5 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 449 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=206, Invalid=1354, Unknown=0, NotChecked=0, Total=1560 [2024-11-14 03:12:28,747 INFO L432 NwaCegarLoop]: 40 mSDtfsCounter, 14 mSDsluCounter, 443 mSDsCounter, 0 mSdLazyCounter, 253 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 483 SdHoareTripleChecker+Invalid, 258 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 253 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-14 03:12:28,747 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 483 Invalid, 258 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 253 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-14 03:12:28,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2024-11-14 03:12:28,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 91. [2024-11-14 03:12:28,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 70 states have (on average 1.042857142857143) internal successors, (73), 73 states have internal predecessors, (73), 11 states have call successors, (11), 7 states have call predecessors, (11), 9 states have return successors, (13), 10 states have call predecessors, (13), 10 states have call successors, (13) [2024-11-14 03:12:28,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 97 transitions. [2024-11-14 03:12:28,761 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 97 transitions. Word has length 82 [2024-11-14 03:12:28,762 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:12:28,762 INFO L471 AbstractCegarLoop]: Abstraction has 91 states and 97 transitions. [2024-11-14 03:12:28,762 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 33 states have (on average 2.727272727272727) internal successors, (90), 34 states have internal predecessors, (90), 9 states have call successors, (11), 1 states have call predecessors, (11), 13 states have return successors, (19), 18 states have call predecessors, (19), 9 states have call successors, (19) [2024-11-14 03:12:28,762 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 97 transitions. [2024-11-14 03:12:28,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2024-11-14 03:12:28,764 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:12:28,764 INFO L215 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 03:12:28,786 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5904c0b-8133-4829-97b6-30abfab23ef8/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2024-11-14 03:12:28,967 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5904c0b-8133-4829-97b6-30abfab23ef8/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2024-11-14 03:12:28,968 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting fibo1Err5ASSERT_VIOLATIONINTEGER_OVERFLOW === [fibo2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, fibo2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, fibo2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 9 more)] === [2024-11-14 03:12:28,968 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:12:28,968 INFO L85 PathProgramCache]: Analyzing trace with hash 484954474, now seen corresponding path program 1 times [2024-11-14 03:12:28,968 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:12:28,968 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1625431459] [2024-11-14 03:12:28,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:12:28,969 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:12:28,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:12:29,332 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 12 proven. 24 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2024-11-14 03:12:29,332 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:12:29,333 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1625431459] [2024-11-14 03:12:29,333 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1625431459] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 03:12:29,333 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1984673660] [2024-11-14 03:12:29,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:12:29,333 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:12:29,333 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5904c0b-8133-4829-97b6-30abfab23ef8/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 03:12:29,335 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5904c0b-8133-4829-97b6-30abfab23ef8/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 03:12:29,339 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5904c0b-8133-4829-97b6-30abfab23ef8/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-11-14 03:12:29,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:12:29,404 INFO L255 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 17 conjuncts are in the unsatisfiable core [2024-11-14 03:12:29,405 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 03:12:29,598 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 13 proven. 13 refuted. 0 times theorem prover too weak. 59 trivial. 0 not checked. [2024-11-14 03:12:29,598 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 03:12:30,256 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 23 proven. 13 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2024-11-14 03:12:30,257 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1984673660] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 03:12:30,257 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1788554005] [2024-11-14 03:12:30,261 INFO L159 IcfgInterpreter]: Started Sifa with 33 locations of interest [2024-11-14 03:12:30,261 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 03:12:30,262 FATAL L? ?]: Ignoring exception! java.lang.IllegalArgumentException: Recursive programs are not supported. at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.topsortRelevant(CallGraph.java:132) at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.(CallGraph.java:97) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.(IcfgInterpreter.java:92) at de.uni_freiburg.informatik.ultimate.plugins.sifa.SifaBuilder.construct(SifaBuilder.java:96) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:98) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:68) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:267) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:148) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:137) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:407) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:342) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:324) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:429) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:315) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:276) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:170) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:143) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:167) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:150) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:127) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:233) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:227) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:144) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:106) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:319) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2024-11-14 03:12:30,263 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 03:12:30,263 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 13, 16] total 33 [2024-11-14 03:12:30,263 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1239697559] [2024-11-14 03:12:30,263 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 03:12:30,264 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2024-11-14 03:12:30,265 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:12:30,265 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2024-11-14 03:12:30,266 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=152, Invalid=970, Unknown=0, NotChecked=0, Total=1122 [2024-11-14 03:12:30,267 INFO L87 Difference]: Start difference. First operand 91 states and 97 transitions. Second operand has 34 states, 33 states have (on average 2.787878787878788) internal successors, (92), 34 states have internal predecessors, (92), 9 states have call successors, (11), 1 states have call predecessors, (11), 12 states have return successors, (20), 20 states have call predecessors, (20), 9 states have call successors, (20) [2024-11-14 03:12:30,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:12:30,450 INFO L93 Difference]: Finished difference Result 120 states and 129 transitions. [2024-11-14 03:12:30,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2024-11-14 03:12:30,451 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 2.787878787878788) internal successors, (92), 34 states have internal predecessors, (92), 9 states have call successors, (11), 1 states have call predecessors, (11), 12 states have return successors, (20), 20 states have call predecessors, (20), 9 states have call successors, (20) Word has length 83 [2024-11-14 03:12:30,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:12:30,451 INFO L225 Difference]: With dead ends: 120 [2024-11-14 03:12:30,455 INFO L226 Difference]: Without dead ends: 0 [2024-11-14 03:12:30,456 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 183 GetRequests, 143 SyntacticMatches, 6 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 593 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=170, Invalid=1090, Unknown=0, NotChecked=0, Total=1260 [2024-11-14 03:12:30,458 INFO L432 NwaCegarLoop]: 34 mSDtfsCounter, 8 mSDsluCounter, 403 mSDsCounter, 0 mSdLazyCounter, 180 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 437 SdHoareTripleChecker+Invalid, 185 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 180 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-14 03:12:30,459 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 437 Invalid, 185 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 180 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-14 03:12:30,459 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2024-11-14 03:12:30,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2024-11-14 03:12:30,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 03:12:30,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2024-11-14 03:12:30,460 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 83 [2024-11-14 03:12:30,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:12:30,461 INFO L471 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2024-11-14 03:12:30,461 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 33 states have (on average 2.787878787878788) internal successors, (92), 34 states have internal predecessors, (92), 9 states have call successors, (11), 1 states have call predecessors, (11), 12 states have return successors, (20), 20 states have call predecessors, (20), 9 states have call successors, (20) [2024-11-14 03:12:30,461 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2024-11-14 03:12:30,461 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2024-11-14 03:12:30,463 INFO L782 garLoopResultBuilder]: Registering result SAFE for location fibo2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (11 of 12 remaining) [2024-11-14 03:12:30,464 INFO L782 garLoopResultBuilder]: Registering result SAFE for location fibo2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW (10 of 12 remaining) [2024-11-14 03:12:30,464 INFO L782 garLoopResultBuilder]: Registering result SAFE for location fibo2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (9 of 12 remaining) [2024-11-14 03:12:30,465 INFO L782 garLoopResultBuilder]: Registering result SAFE for location fibo2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW (8 of 12 remaining) [2024-11-14 03:12:30,465 INFO L782 garLoopResultBuilder]: Registering result SAFE for location fibo2Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (7 of 12 remaining) [2024-11-14 03:12:30,465 INFO L782 garLoopResultBuilder]: Registering result SAFE for location fibo2Err5ASSERT_VIOLATIONINTEGER_OVERFLOW (6 of 12 remaining) [2024-11-14 03:12:30,465 INFO L782 garLoopResultBuilder]: Registering result SAFE for location fibo1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (5 of 12 remaining) [2024-11-14 03:12:30,465 INFO L782 garLoopResultBuilder]: Registering result SAFE for location fibo1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW (4 of 12 remaining) [2024-11-14 03:12:30,465 INFO L782 garLoopResultBuilder]: Registering result SAFE for location fibo1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (3 of 12 remaining) [2024-11-14 03:12:30,465 INFO L782 garLoopResultBuilder]: Registering result SAFE for location fibo1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW (2 of 12 remaining) [2024-11-14 03:12:30,466 INFO L782 garLoopResultBuilder]: Registering result SAFE for location fibo1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (1 of 12 remaining) [2024-11-14 03:12:30,466 INFO L782 garLoopResultBuilder]: Registering result SAFE for location fibo1Err5ASSERT_VIOLATIONINTEGER_OVERFLOW (0 of 12 remaining) [2024-11-14 03:12:30,486 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5904c0b-8133-4829-97b6-30abfab23ef8/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2024-11-14 03:12:30,669 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5904c0b-8133-4829-97b6-30abfab23ef8/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:12:30,672 INFO L407 BasicCegarLoop]: Path program histogram: [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 03:12:30,674 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2024-11-14 03:12:32,050 INFO L173 ceAbstractionStarter]: Computing trace abstraction results [2024-11-14 03:12:32,089 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 14.11 03:12:32 BoogieIcfgContainer [2024-11-14 03:12:32,089 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2024-11-14 03:12:32,090 INFO L112 PluginConnector]: ------------------------Witness Printer---------------------------- [2024-11-14 03:12:32,090 INFO L270 PluginConnector]: Initializing Witness Printer... [2024-11-14 03:12:32,090 INFO L274 PluginConnector]: Witness Printer initialized [2024-11-14 03:12:32,091 INFO L184 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.11 03:12:13" (3/4) ... [2024-11-14 03:12:32,093 INFO L142 WitnessPrinter]: Generating witness for correct program [2024-11-14 03:12:32,097 INFO L361 RCFGBacktranslator]: Ignoring RootEdge to procedure fibo2 [2024-11-14 03:12:32,097 INFO L361 RCFGBacktranslator]: Ignoring RootEdge to procedure fibo1 [2024-11-14 03:12:32,101 INFO L925 BoogieBacktranslator]: Reduced CFG by removing 17 nodes and edges [2024-11-14 03:12:32,102 INFO L925 BoogieBacktranslator]: Reduced CFG by removing 5 nodes and edges [2024-11-14 03:12:32,102 INFO L925 BoogieBacktranslator]: Reduced CFG by removing 3 nodes and edges [2024-11-14 03:12:32,102 INFO L925 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2024-11-14 03:12:32,184 INFO L149 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5904c0b-8133-4829-97b6-30abfab23ef8/bin/utaipan-verify-sOmjnqqW8E/witness.graphml [2024-11-14 03:12:32,184 INFO L149 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5904c0b-8133-4829-97b6-30abfab23ef8/bin/utaipan-verify-sOmjnqqW8E/witness.yml [2024-11-14 03:12:32,185 INFO L131 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2024-11-14 03:12:32,186 INFO L158 Benchmark]: Toolchain (without parser) took 19379.90ms. Allocated memory was 142.6MB in the beginning and 218.1MB in the end (delta: 75.5MB). Free memory was 118.8MB in the beginning and 137.2MB in the end (delta: -18.4MB). Peak memory consumption was 55.1MB. Max. memory is 16.1GB. [2024-11-14 03:12:32,186 INFO L158 Benchmark]: CDTParser took 0.33ms. Allocated memory is still 142.6MB. Free memory is still 81.1MB. There was no memory consumed. Max. memory is 16.1GB. [2024-11-14 03:12:32,186 INFO L158 Benchmark]: CACSL2BoogieTranslator took 210.51ms. Allocated memory is still 142.6MB. Free memory was 118.8MB in the beginning and 108.2MB in the end (delta: 10.6MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2024-11-14 03:12:32,187 INFO L158 Benchmark]: Boogie Procedure Inliner took 28.09ms. Allocated memory is still 142.6MB. Free memory was 108.2MB in the beginning and 107.1MB in the end (delta: 1.1MB). There was no memory consumed. Max. memory is 16.1GB. [2024-11-14 03:12:32,187 INFO L158 Benchmark]: Boogie Preprocessor took 13.64ms. Allocated memory is still 142.6MB. Free memory was 107.1MB in the beginning and 106.6MB in the end (delta: 543.3kB). There was no memory consumed. Max. memory is 16.1GB. [2024-11-14 03:12:32,187 INFO L158 Benchmark]: RCFGBuilder took 436.22ms. Allocated memory is still 142.6MB. Free memory was 106.3MB in the beginning and 93.7MB in the end (delta: 12.6MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. [2024-11-14 03:12:32,188 INFO L158 Benchmark]: TraceAbstraction took 18589.66ms. Allocated memory was 142.6MB in the beginning and 218.1MB in the end (delta: 75.5MB). Free memory was 92.9MB in the beginning and 141.9MB in the end (delta: -49.0MB). Peak memory consumption was 101.3MB. Max. memory is 16.1GB. [2024-11-14 03:12:32,188 INFO L158 Benchmark]: Witness Printer took 94.85ms. Allocated memory is still 218.1MB. Free memory was 141.9MB in the beginning and 137.2MB in the end (delta: 4.7MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2024-11-14 03:12:32,190 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.33ms. Allocated memory is still 142.6MB. Free memory is still 81.1MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 210.51ms. Allocated memory is still 142.6MB. Free memory was 118.8MB in the beginning and 108.2MB in the end (delta: 10.6MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 28.09ms. Allocated memory is still 142.6MB. Free memory was 108.2MB in the beginning and 107.1MB in the end (delta: 1.1MB). There was no memory consumed. Max. memory is 16.1GB. * Boogie Preprocessor took 13.64ms. Allocated memory is still 142.6MB. Free memory was 107.1MB in the beginning and 106.6MB in the end (delta: 543.3kB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 436.22ms. Allocated memory is still 142.6MB. Free memory was 106.3MB in the beginning and 93.7MB in the end (delta: 12.6MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. * TraceAbstraction took 18589.66ms. Allocated memory was 142.6MB in the beginning and 218.1MB in the end (delta: 75.5MB). Free memory was 92.9MB in the beginning and 141.9MB in the end (delta: -49.0MB). Peak memory consumption was 101.3MB. Max. memory is 16.1GB. * Witness Printer took 94.85ms. Allocated memory is still 218.1MB. Free memory was 141.9MB in the beginning and 137.2MB in the end (delta: 4.7MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 25]: integer overflow can never occur For all program executions holds that integer overflow can never occur at this location - PositiveResult [Line: 25]: integer overflow can never occur For all program executions holds that integer overflow can never occur at this location - PositiveResult [Line: 25]: integer overflow can never occur For all program executions holds that integer overflow can never occur at this location - PositiveResult [Line: 25]: integer overflow can never occur For all program executions holds that integer overflow can never occur at this location - PositiveResult [Line: 25]: integer overflow can never occur For all program executions holds that integer overflow can never occur at this location - PositiveResult [Line: 25]: integer overflow can never occur For all program executions holds that integer overflow can never occur at this location - PositiveResult [Line: 15]: integer overflow can never occur For all program executions holds that integer overflow can never occur at this location - PositiveResult [Line: 15]: integer overflow can never occur For all program executions holds that integer overflow can never occur at this location - PositiveResult [Line: 15]: integer overflow can never occur For all program executions holds that integer overflow can never occur at this location - PositiveResult [Line: 15]: integer overflow can never occur For all program executions holds that integer overflow can never occur at this location - PositiveResult [Line: 15]: integer overflow can never occur For all program executions holds that integer overflow can never occur at this location - PositiveResult [Line: 15]: integer overflow can never occur For all program executions holds that integer overflow can never occur at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 46 locations, 12 error locations. Started 1 CEGAR loops. OverallTime: 17.1s, OverallIterations: 22, TraceHistogramMax: 5, PathProgramHistogramMax: 2, EmptinessCheckTime: 0.0s, AutomataDifference: 5.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 832 SdHoareTripleChecker+Valid, 3.4s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 802 mSDsluCounter, 4556 SdHoareTripleChecker+Invalid, 2.8s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 3816 mSDsCounter, 238 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 4233 IncrementalHoareTripleChecker+Invalid, 4471 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 238 mSolverCounterUnsat, 740 mSDtfsCounter, 4233 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 1265 GetRequests, 919 SyntacticMatches, 34 SemanticMatches, 312 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2124 ImplicationChecksByTransitivity, 4.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=165occurred in iteration=16, InterpolantAutomatonStates: 232, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.4s AutomataMinimizationTime, 22 MinimizatonAttempts, 223 StatesRemovedByMinimization, 21 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.5s SatisfiabilityAnalysisTime, 7.4s InterpolantComputationTime, 1503 NumberOfCodeBlocks, 1503 NumberOfCodeBlocksAsserted, 35 NumberOfCheckSat, 1876 ConstructedInterpolants, 0 QuantifiedInterpolants, 4160 SizeOfPredicates, 17 NumberOfNonLiveVariables, 1422 ConjunctsInSsa, 118 ConjunctsInUnsatCore, 41 InterpolantComputations, 15 PerfectInterpolantSequences, 1099/1381 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 12 specifications checked. All of them hold - ProcedureContractResult [Line: 19]: Procedure Contract for fibo2 Derived contract for procedure fibo2. Requires: (n <= 3) Ensures: (((((n <= 3) && (((2 == \result) || ((\result <= 1) && (0 <= ((long long) 2147483647 + \result)))) || (n < 2))) && ((\result == 0) || (0 < n))) && ((n < 3) || (2 == \result))) && (((\result == 1) || ((\result == 0) && (n <= 0))) || (1 < n))) - ProcedureContractResult [Line: 9]: Procedure Contract for fibo1 Derived contract for procedure fibo1. Requires: ((n < 3) || (n == 4)) Ensures: ((((n < 3) || (n == 4)) && ((((\result == 0) && (n <= 0)) || (\result == 1)) || (2 < n))) && ((\result == 0) || (0 < n))) RESULT: Ultimate proved your program to be correct! [2024-11-14 03:12:32,227 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5904c0b-8133-4829-97b6-30abfab23ef8/bin/utaipan-verify-sOmjnqqW8E/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: TRUE