./Ultimate.py --spec ../../sv-benchmarks/c/properties/no-overflow.prp --file ../../sv-benchmarks/c/recursive-simple/fibo_5-2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for overflows Using default analysis Version 0e0057cc Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eeebd75c-4b30-4d55-93a6-cb1d2a15638f/bin/utaipan-verify-nQ1chXbOIh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eeebd75c-4b30-4d55-93a6-cb1d2a15638f/bin/utaipan-verify-nQ1chXbOIh/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eeebd75c-4b30-4d55-93a6-cb1d2a15638f/bin/utaipan-verify-nQ1chXbOIh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eeebd75c-4b30-4d55-93a6-cb1d2a15638f/bin/utaipan-verify-nQ1chXbOIh/config/TaipanReach.xml -i ../../sv-benchmarks/c/recursive-simple/fibo_5-2.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eeebd75c-4b30-4d55-93a6-cb1d2a15638f/bin/utaipan-verify-nQ1chXbOIh/config/svcomp-Overflow-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eeebd75c-4b30-4d55-93a6-cb1d2a15638f/bin/utaipan-verify-nQ1chXbOIh --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 02dc726982da9e300f34803a4bdbb3c0165037d3f4471bd0e009c42cfb19ed24 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-12-02 13:31:34,087 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-12-02 13:31:34,150 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eeebd75c-4b30-4d55-93a6-cb1d2a15638f/bin/utaipan-verify-nQ1chXbOIh/config/svcomp-Overflow-32bit-Taipan_Default.epf [2023-12-02 13:31:34,155 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-12-02 13:31:34,156 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-12-02 13:31:34,180 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-12-02 13:31:34,180 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-12-02 13:31:34,181 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-12-02 13:31:34,181 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-12-02 13:31:34,182 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-12-02 13:31:34,182 INFO L153 SettingsManager]: * User list type=DISABLED [2023-12-02 13:31:34,183 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-12-02 13:31:34,184 INFO L153 SettingsManager]: * Explicit value domain=true [2023-12-02 13:31:34,184 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-12-02 13:31:34,185 INFO L153 SettingsManager]: * Octagon Domain=false [2023-12-02 13:31:34,185 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-12-02 13:31:34,186 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-12-02 13:31:34,186 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-12-02 13:31:34,187 INFO L153 SettingsManager]: * Interval Domain=false [2023-12-02 13:31:34,187 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-12-02 13:31:34,188 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-12-02 13:31:34,189 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-12-02 13:31:34,189 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-12-02 13:31:34,190 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-12-02 13:31:34,190 INFO L153 SettingsManager]: * sizeof long=4 [2023-12-02 13:31:34,191 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-12-02 13:31:34,191 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-12-02 13:31:34,191 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-12-02 13:31:34,192 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-12-02 13:31:34,192 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-12-02 13:31:34,193 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-12-02 13:31:34,193 INFO L153 SettingsManager]: * Check absence of signed integer overflows=true [2023-12-02 13:31:34,193 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-12-02 13:31:34,193 INFO L153 SettingsManager]: * sizeof long double=12 [2023-12-02 13:31:34,194 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-12-02 13:31:34,194 INFO L153 SettingsManager]: * Use constant arrays=true [2023-12-02 13:31:34,194 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-12-02 13:31:34,194 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-12-02 13:31:34,194 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-12-02 13:31:34,195 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-12-02 13:31:34,195 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-12-02 13:31:34,195 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-12-02 13:31:34,195 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-12-02 13:31:34,196 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-12-02 13:31:34,196 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-12-02 13:31:34,196 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-12-02 13:31:34,196 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-12-02 13:31:34,196 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-12-02 13:31:34,197 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-12-02 13:31:34,197 INFO L153 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eeebd75c-4b30-4d55-93a6-cb1d2a15638f/bin/utaipan-verify-nQ1chXbOIh/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eeebd75c-4b30-4d55-93a6-cb1d2a15638f/bin/utaipan-verify-nQ1chXbOIh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! overflow) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 02dc726982da9e300f34803a4bdbb3c0165037d3f4471bd0e009c42cfb19ed24 [2023-12-02 13:31:34,411 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-12-02 13:31:34,431 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-12-02 13:31:34,434 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-12-02 13:31:34,435 INFO L270 PluginConnector]: Initializing CDTParser... [2023-12-02 13:31:34,436 INFO L274 PluginConnector]: CDTParser initialized [2023-12-02 13:31:34,437 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eeebd75c-4b30-4d55-93a6-cb1d2a15638f/bin/utaipan-verify-nQ1chXbOIh/../../sv-benchmarks/c/recursive-simple/fibo_5-2.c [2023-12-02 13:31:37,193 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-12-02 13:31:37,332 INFO L384 CDTParser]: Found 1 translation units. [2023-12-02 13:31:37,333 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eeebd75c-4b30-4d55-93a6-cb1d2a15638f/sv-benchmarks/c/recursive-simple/fibo_5-2.c [2023-12-02 13:31:37,338 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eeebd75c-4b30-4d55-93a6-cb1d2a15638f/bin/utaipan-verify-nQ1chXbOIh/data/fbd2c8a01/1e8708d3515d443bb68f57378803802f/FLAG90356de8d [2023-12-02 13:31:37,350 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eeebd75c-4b30-4d55-93a6-cb1d2a15638f/bin/utaipan-verify-nQ1chXbOIh/data/fbd2c8a01/1e8708d3515d443bb68f57378803802f [2023-12-02 13:31:37,352 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-12-02 13:31:37,353 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-12-02 13:31:37,354 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-12-02 13:31:37,354 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-12-02 13:31:37,358 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-12-02 13:31:37,358 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 01:31:37" (1/1) ... [2023-12-02 13:31:37,359 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@28f21df2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 01:31:37, skipping insertion in model container [2023-12-02 13:31:37,359 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 01:31:37" (1/1) ... [2023-12-02 13:31:37,377 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-12-02 13:31:37,490 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-02 13:31:37,499 INFO L202 MainTranslator]: Completed pre-run [2023-12-02 13:31:37,511 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-02 13:31:37,522 INFO L206 MainTranslator]: Completed translation [2023-12-02 13:31:37,522 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 01:31:37 WrapperNode [2023-12-02 13:31:37,522 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-12-02 13:31:37,523 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-12-02 13:31:37,523 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-12-02 13:31:37,523 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-12-02 13:31:37,529 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 01:31:37" (1/1) ... [2023-12-02 13:31:37,534 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 01:31:37" (1/1) ... [2023-12-02 13:31:37,547 INFO L138 Inliner]: procedures = 13, calls = 11, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 21 [2023-12-02 13:31:37,547 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-12-02 13:31:37,548 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-12-02 13:31:37,548 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-12-02 13:31:37,548 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-12-02 13:31:37,554 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 01:31:37" (1/1) ... [2023-12-02 13:31:37,554 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 01:31:37" (1/1) ... [2023-12-02 13:31:37,555 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 01:31:37" (1/1) ... [2023-12-02 13:31:37,555 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 01:31:37" (1/1) ... [2023-12-02 13:31:37,558 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 01:31:37" (1/1) ... [2023-12-02 13:31:37,560 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 01:31:37" (1/1) ... [2023-12-02 13:31:37,561 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 01:31:37" (1/1) ... [2023-12-02 13:31:37,561 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 01:31:37" (1/1) ... [2023-12-02 13:31:37,563 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-12-02 13:31:37,564 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-12-02 13:31:37,564 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-12-02 13:31:37,564 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-12-02 13:31:37,565 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 01:31:37" (1/1) ... [2023-12-02 13:31:37,569 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-12-02 13:31:37,581 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eeebd75c-4b30-4d55-93a6-cb1d2a15638f/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 13:31:37,591 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eeebd75c-4b30-4d55-93a6-cb1d2a15638f/bin/utaipan-verify-nQ1chXbOIh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-12-02 13:31:37,594 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eeebd75c-4b30-4d55-93a6-cb1d2a15638f/bin/utaipan-verify-nQ1chXbOIh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-12-02 13:31:37,620 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-12-02 13:31:37,620 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-12-02 13:31:37,620 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-12-02 13:31:37,620 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-12-02 13:31:37,621 INFO L130 BoogieDeclarations]: Found specification of procedure fibo [2023-12-02 13:31:37,621 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo [2023-12-02 13:31:37,678 INFO L241 CfgBuilder]: Building ICFG [2023-12-02 13:31:37,680 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-12-02 13:31:37,790 INFO L282 CfgBuilder]: Performing block encoding [2023-12-02 13:31:37,825 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-12-02 13:31:37,825 INFO L309 CfgBuilder]: Removed 0 assume(true) statements. [2023-12-02 13:31:37,826 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 01:31:37 BoogieIcfgContainer [2023-12-02 13:31:37,827 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-12-02 13:31:37,829 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-12-02 13:31:37,829 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-12-02 13:31:37,832 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-12-02 13:31:37,832 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.12 01:31:37" (1/3) ... [2023-12-02 13:31:37,833 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@34a8f864 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 01:31:37, skipping insertion in model container [2023-12-02 13:31:37,833 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 01:31:37" (2/3) ... [2023-12-02 13:31:37,833 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@34a8f864 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 01:31:37, skipping insertion in model container [2023-12-02 13:31:37,833 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 01:31:37" (3/3) ... [2023-12-02 13:31:37,835 INFO L112 eAbstractionObserver]: Analyzing ICFG fibo_5-2.c [2023-12-02 13:31:37,850 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-12-02 13:31:37,850 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 6 error locations. [2023-12-02 13:31:37,891 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-12-02 13:31:37,897 INFO L357 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, mHoare=true, 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;@20847bf2, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-12-02 13:31:37,897 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2023-12-02 13:31:37,900 INFO L276 IsEmpty]: Start isEmpty. Operand has 25 states, 14 states have (on average 1.5714285714285714) internal successors, (22), 20 states have internal predecessors, (22), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-12-02 13:31:37,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2023-12-02 13:31:37,906 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 13:31:37,906 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2023-12-02 13:31:37,907 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting fiboErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [fiboErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, fiboErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, fiboErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2023-12-02 13:31:37,911 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 13:31:37,911 INFO L85 PathProgramCache]: Analyzing trace with hash -1905229472, now seen corresponding path program 1 times [2023-12-02 13:31:37,919 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 13:31:37,919 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1147372605] [2023-12-02 13:31:37,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:31:37,920 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 13:31:37,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 13:31:38,056 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 13:31:38,056 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 13:31:38,057 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1147372605] [2023-12-02 13:31:38,058 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1147372605] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 13:31:38,058 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 13:31:38,058 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-12-02 13:31:38,059 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [528839086] [2023-12-02 13:31:38,060 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 13:31:38,063 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 13:31:38,063 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 13:31:38,090 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 13:31:38,091 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 13:31:38,093 INFO L87 Difference]: Start difference. First operand has 25 states, 14 states have (on average 1.5714285714285714) internal successors, (22), 20 states have internal predecessors, (22), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) 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) [2023-12-02 13:31:38,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 13:31:38,135 INFO L93 Difference]: Finished difference Result 27 states and 32 transitions. [2023-12-02 13:31:38,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 13:31:38,138 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 [2023-12-02 13:31:38,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 13:31:38,145 INFO L225 Difference]: With dead ends: 27 [2023-12-02 13:31:38,146 INFO L226 Difference]: Without dead ends: 23 [2023-12-02 13:31:38,148 INFO L412 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 [2023-12-02 13:31:38,152 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 14 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-02 13:31:38,153 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 26 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-02 13:31:38,169 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2023-12-02 13:31:38,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 21. [2023-12-02 13:31:38,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 13 states have (on average 1.4615384615384615) internal successors, (19), 17 states have internal predecessors, (19), 3 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) [2023-12-02 13:31:38,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 24 transitions. [2023-12-02 13:31:38,189 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 24 transitions. Word has length 6 [2023-12-02 13:31:38,189 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 13:31:38,190 INFO L495 AbstractCegarLoop]: Abstraction has 21 states and 24 transitions. [2023-12-02 13:31:38,190 INFO L496 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) [2023-12-02 13:31:38,190 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 24 transitions. [2023-12-02 13:31:38,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2023-12-02 13:31:38,191 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 13:31:38,191 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-12-02 13:31:38,191 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-12-02 13:31:38,192 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting fiboErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [fiboErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, fiboErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, fiboErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2023-12-02 13:31:38,194 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 13:31:38,194 INFO L85 PathProgramCache]: Analyzing trace with hash 1067428573, now seen corresponding path program 1 times [2023-12-02 13:31:38,194 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 13:31:38,194 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [882130115] [2023-12-02 13:31:38,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:31:38,195 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 13:31:38,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 13:31:38,263 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 13:31:38,263 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 13:31:38,264 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [882130115] [2023-12-02 13:31:38,264 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [882130115] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 13:31:38,264 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 13:31:38,264 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-02 13:31:38,265 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [876004569] [2023-12-02 13:31:38,265 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 13:31:38,266 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-12-02 13:31:38,266 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 13:31:38,267 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-12-02 13:31:38,267 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-12-02 13:31:38,268 INFO L87 Difference]: Start difference. First operand 21 states and 24 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) [2023-12-02 13:31:38,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 13:31:38,326 INFO L93 Difference]: Finished difference Result 21 states and 24 transitions. [2023-12-02 13:31:38,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-12-02 13:31:38,327 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 [2023-12-02 13:31:38,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 13:31:38,328 INFO L225 Difference]: With dead ends: 21 [2023-12-02 13:31:38,328 INFO L226 Difference]: Without dead ends: 19 [2023-12-02 13:31:38,329 INFO L412 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 [2023-12-02 13:31:38,330 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 28 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-02 13:31:38,331 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 19 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-02 13:31:38,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2023-12-02 13:31:38,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2023-12-02 13:31:38,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 13 states have (on average 1.3076923076923077) internal successors, (17), 15 states have internal predecessors, (17), 3 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) [2023-12-02 13:31:38,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 22 transitions. [2023-12-02 13:31:38,338 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 22 transitions. Word has length 7 [2023-12-02 13:31:38,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 13:31:38,339 INFO L495 AbstractCegarLoop]: Abstraction has 19 states and 22 transitions. [2023-12-02 13:31:38,339 INFO L496 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) [2023-12-02 13:31:38,339 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 22 transitions. [2023-12-02 13:31:38,344 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2023-12-02 13:31:38,344 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 13:31:38,345 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 13:31:38,345 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-12-02 13:31:38,345 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting fiboErr4ASSERT_VIOLATIONINTEGER_OVERFLOW === [fiboErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, fiboErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, fiboErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2023-12-02 13:31:38,346 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 13:31:38,346 INFO L85 PathProgramCache]: Analyzing trace with hash 803661136, now seen corresponding path program 1 times [2023-12-02 13:31:38,346 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 13:31:38,347 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1699400192] [2023-12-02 13:31:38,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:31:38,347 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 13:31:38,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 13:31:38,512 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-12-02 13:31:38,513 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 13:31:38,513 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1699400192] [2023-12-02 13:31:38,513 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1699400192] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 13:31:38,513 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 13:31:38,513 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-12-02 13:31:38,514 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [987739062] [2023-12-02 13:31:38,514 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 13:31:38,514 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-12-02 13:31:38,514 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 13:31:38,515 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-12-02 13:31:38,516 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-12-02 13:31:38,516 INFO L87 Difference]: Start difference. First operand 19 states and 22 transitions. Second operand has 5 states, 4 states have (on average 3.25) internal successors, (13), 5 states have internal predecessors, (13), 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) [2023-12-02 13:31:38,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 13:31:38,560 INFO L93 Difference]: Finished difference Result 35 states and 41 transitions. [2023-12-02 13:31:38,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-12-02 13:31:38,560 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.25) internal successors, (13), 5 states have internal predecessors, (13), 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 [2023-12-02 13:31:38,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 13:31:38,562 INFO L225 Difference]: With dead ends: 35 [2023-12-02 13:31:38,562 INFO L226 Difference]: Without dead ends: 33 [2023-12-02 13:31:38,562 INFO L412 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 [2023-12-02 13:31:38,564 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 5 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-02 13:31:38,564 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 57 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-02 13:31:38,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2023-12-02 13:31:38,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 28. [2023-12-02 13:31:38,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 20 states have (on average 1.2) internal successors, (24), 22 states have internal predecessors, (24), 4 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2023-12-02 13:31:38,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 34 transitions. [2023-12-02 13:31:38,574 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 34 transitions. Word has length 22 [2023-12-02 13:31:38,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 13:31:38,575 INFO L495 AbstractCegarLoop]: Abstraction has 28 states and 34 transitions. [2023-12-02 13:31:38,575 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.25) internal successors, (13), 5 states have internal predecessors, (13), 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) [2023-12-02 13:31:38,575 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 34 transitions. [2023-12-02 13:31:38,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2023-12-02 13:31:38,576 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 13:31:38,576 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 13:31:38,576 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-12-02 13:31:38,577 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting fiboErr4ASSERT_VIOLATIONINTEGER_OVERFLOW === [fiboErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, fiboErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, fiboErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2023-12-02 13:31:38,577 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 13:31:38,577 INFO L85 PathProgramCache]: Analyzing trace with hash -844470953, now seen corresponding path program 1 times [2023-12-02 13:31:38,578 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 13:31:38,578 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1338424349] [2023-12-02 13:31:38,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:31:38,578 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 13:31:38,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 13:31:38,688 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-12-02 13:31:38,689 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 13:31:38,689 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1338424349] [2023-12-02 13:31:38,689 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1338424349] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 13:31:38,689 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [965818891] [2023-12-02 13:31:38,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:31:38,690 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 13:31:38,690 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eeebd75c-4b30-4d55-93a6-cb1d2a15638f/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 13:31:38,696 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eeebd75c-4b30-4d55-93a6-cb1d2a15638f/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 13:31:38,700 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eeebd75c-4b30-4d55-93a6-cb1d2a15638f/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-12-02 13:31:38,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 13:31:38,745 INFO L262 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 6 conjunts are in the unsatisfiable core [2023-12-02 13:31:38,749 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 13:31:38,835 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 7 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 13:31:38,835 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 13:31:38,949 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-12-02 13:31:38,950 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [965818891] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 13:31:38,950 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1954612401] [2023-12-02 13:31:38,965 INFO L159 IcfgInterpreter]: Started Sifa with 17 locations of interest [2023-12-02 13:31:38,966 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 13:31:38,970 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:337) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:431) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:366) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:415) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:262) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:175) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:154) 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) [2023-12-02 13:31:38,971 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-02 13:31:38,971 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 7, 7] total 15 [2023-12-02 13:31:38,971 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [377061123] [2023-12-02 13:31:38,972 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-02 13:31:38,972 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-12-02 13:31:38,972 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 13:31:38,973 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-12-02 13:31:38,974 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2023-12-02 13:31:38,974 INFO L87 Difference]: Start difference. First operand 28 states and 34 transitions. Second operand has 15 states, 13 states have (on average 3.3076923076923075) internal successors, (43), 13 states have internal predecessors, (43), 7 states have call successors, (9), 4 states have call predecessors, (9), 5 states have return successors, (6), 3 states have call predecessors, (6), 5 states have call successors, (6) [2023-12-02 13:31:39,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 13:31:39,331 INFO L93 Difference]: Finished difference Result 125 states and 171 transitions. [2023-12-02 13:31:39,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-12-02 13:31:39,332 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 13 states have (on average 3.3076923076923075) internal successors, (43), 13 states have internal predecessors, (43), 7 states have call successors, (9), 4 states have call predecessors, (9), 5 states have return successors, (6), 3 states have call predecessors, (6), 5 states have call successors, (6) Word has length 23 [2023-12-02 13:31:39,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 13:31:39,334 INFO L225 Difference]: With dead ends: 125 [2023-12-02 13:31:39,334 INFO L226 Difference]: Without dead ends: 92 [2023-12-02 13:31:39,336 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=73, Invalid=347, Unknown=0, NotChecked=0, Total=420 [2023-12-02 13:31:39,338 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 121 mSDsluCounter, 124 mSDsCounter, 0 mSdLazyCounter, 377 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 127 SdHoareTripleChecker+Valid, 146 SdHoareTripleChecker+Invalid, 425 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 377 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-12-02 13:31:39,338 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [127 Valid, 146 Invalid, 425 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 377 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-12-02 13:31:39,339 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2023-12-02 13:31:39,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 80. [2023-12-02 13:31:39,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 61 states have (on average 1.1147540983606556) internal successors, (68), 63 states have internal predecessors, (68), 11 states have call successors, (11), 3 states have call predecessors, (11), 6 states have return successors, (32), 13 states have call predecessors, (32), 10 states have call successors, (32) [2023-12-02 13:31:39,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 111 transitions. [2023-12-02 13:31:39,362 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 111 transitions. Word has length 23 [2023-12-02 13:31:39,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 13:31:39,362 INFO L495 AbstractCegarLoop]: Abstraction has 80 states and 111 transitions. [2023-12-02 13:31:39,362 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 13 states have (on average 3.3076923076923075) internal successors, (43), 13 states have internal predecessors, (43), 7 states have call successors, (9), 4 states have call predecessors, (9), 5 states have return successors, (6), 3 states have call predecessors, (6), 5 states have call successors, (6) [2023-12-02 13:31:39,362 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 111 transitions. [2023-12-02 13:31:39,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2023-12-02 13:31:39,364 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 13:31:39,364 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 13:31:39,369 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eeebd75c-4b30-4d55-93a6-cb1d2a15638f/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-12-02 13:31:39,564 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eeebd75c-4b30-4d55-93a6-cb1d2a15638f/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 13:31:39,565 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting fiboErr4ASSERT_VIOLATIONINTEGER_OVERFLOW === [fiboErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, fiboErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, fiboErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2023-12-02 13:31:39,565 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 13:31:39,565 INFO L85 PathProgramCache]: Analyzing trace with hash 2139513579, now seen corresponding path program 2 times [2023-12-02 13:31:39,565 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 13:31:39,565 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1323526661] [2023-12-02 13:31:39,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:31:39,566 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 13:31:39,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 13:31:39,672 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-12-02 13:31:39,672 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 13:31:39,673 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1323526661] [2023-12-02 13:31:39,673 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1323526661] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 13:31:39,673 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1394959990] [2023-12-02 13:31:39,673 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-02 13:31:39,673 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 13:31:39,673 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eeebd75c-4b30-4d55-93a6-cb1d2a15638f/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 13:31:39,674 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eeebd75c-4b30-4d55-93a6-cb1d2a15638f/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 13:31:39,680 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eeebd75c-4b30-4d55-93a6-cb1d2a15638f/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-12-02 13:31:39,719 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-12-02 13:31:39,720 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 13:31:39,720 INFO L262 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 4 conjunts are in the unsatisfiable core [2023-12-02 13:31:39,722 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 13:31:39,767 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-12-02 13:31:39,767 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 13:31:39,767 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1394959990] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 13:31:39,767 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-02 13:31:39,768 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 8 [2023-12-02 13:31:39,768 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1837647624] [2023-12-02 13:31:39,768 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 13:31:39,768 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-12-02 13:31:39,768 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 13:31:39,769 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-12-02 13:31:39,769 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2023-12-02 13:31:39,770 INFO L87 Difference]: Start difference. First operand 80 states and 111 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), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-12-02 13:31:39,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 13:31:39,803 INFO L93 Difference]: Finished difference Result 101 states and 140 transitions. [2023-12-02 13:31:39,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-12-02 13:31:39,804 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), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 29 [2023-12-02 13:31:39,805 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 13:31:39,807 INFO L225 Difference]: With dead ends: 101 [2023-12-02 13:31:39,807 INFO L226 Difference]: Without dead ends: 100 [2023-12-02 13:31:39,807 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2023-12-02 13:31:39,809 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 6 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-02 13:31:39,809 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 53 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-02 13:31:39,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2023-12-02 13:31:39,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 86. [2023-12-02 13:31:39,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 66 states have (on average 1.106060606060606) internal successors, (73), 67 states have internal predecessors, (73), 11 states have call successors, (11), 3 states have call predecessors, (11), 7 states have return successors, (39), 15 states have call predecessors, (39), 10 states have call successors, (39) [2023-12-02 13:31:39,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 123 transitions. [2023-12-02 13:31:39,833 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 123 transitions. Word has length 29 [2023-12-02 13:31:39,833 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 13:31:39,833 INFO L495 AbstractCegarLoop]: Abstraction has 86 states and 123 transitions. [2023-12-02 13:31:39,833 INFO L496 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), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-12-02 13:31:39,834 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 123 transitions. [2023-12-02 13:31:39,835 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2023-12-02 13:31:39,835 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 13:31:39,835 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 13:31:39,840 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eeebd75c-4b30-4d55-93a6-cb1d2a15638f/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-12-02 13:31:40,040 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eeebd75c-4b30-4d55-93a6-cb1d2a15638f/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 13:31:40,040 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting fiboErr5ASSERT_VIOLATIONINTEGER_OVERFLOW === [fiboErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, fiboErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, fiboErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2023-12-02 13:31:40,041 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 13:31:40,041 INFO L85 PathProgramCache]: Analyzing trace with hash 1900411582, now seen corresponding path program 1 times [2023-12-02 13:31:40,041 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 13:31:40,041 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1219648929] [2023-12-02 13:31:40,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:31:40,041 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 13:31:40,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 13:31:40,115 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-12-02 13:31:40,115 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 13:31:40,115 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1219648929] [2023-12-02 13:31:40,115 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1219648929] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 13:31:40,116 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [7018802] [2023-12-02 13:31:40,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:31:40,116 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 13:31:40,116 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eeebd75c-4b30-4d55-93a6-cb1d2a15638f/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 13:31:40,117 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eeebd75c-4b30-4d55-93a6-cb1d2a15638f/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 13:31:40,120 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eeebd75c-4b30-4d55-93a6-cb1d2a15638f/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-12-02 13:31:40,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 13:31:40,163 INFO L262 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 8 conjunts are in the unsatisfiable core [2023-12-02 13:31:40,165 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 13:31:40,260 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 8 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 13:31:40,260 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 13:31:40,399 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-12-02 13:31:40,400 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [7018802] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 13:31:40,400 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2109124615] [2023-12-02 13:31:40,402 INFO L159 IcfgInterpreter]: Started Sifa with 18 locations of interest [2023-12-02 13:31:40,403 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 13:31:40,403 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:337) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:431) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:366) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:415) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:262) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:175) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:154) 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) [2023-12-02 13:31:40,403 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-02 13:31:40,403 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 9, 9] total 17 [2023-12-02 13:31:40,404 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [633607002] [2023-12-02 13:31:40,404 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-02 13:31:40,404 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-12-02 13:31:40,405 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 13:31:40,405 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-12-02 13:31:40,406 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2023-12-02 13:31:40,406 INFO L87 Difference]: Start difference. First operand 86 states and 123 transitions. Second operand has 17 states, 15 states have (on average 3.4) internal successors, (51), 14 states have internal predecessors, (51), 8 states have call successors, (11), 5 states have call predecessors, (11), 5 states have return successors, (6), 3 states have call predecessors, (6), 5 states have call successors, (6) [2023-12-02 13:31:41,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 13:31:41,012 INFO L93 Difference]: Finished difference Result 275 states and 419 transitions. [2023-12-02 13:31:41,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-12-02 13:31:41,013 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 15 states have (on average 3.4) internal successors, (51), 14 states have internal predecessors, (51), 8 states have call successors, (11), 5 states have call predecessors, (11), 5 states have return successors, (6), 3 states have call predecessors, (6), 5 states have call successors, (6) Word has length 30 [2023-12-02 13:31:41,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 13:31:41,016 INFO L225 Difference]: With dead ends: 275 [2023-12-02 13:31:41,016 INFO L226 Difference]: Without dead ends: 197 [2023-12-02 13:31:41,019 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 51 SyntacticMatches, 3 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=144, Invalid=668, Unknown=0, NotChecked=0, Total=812 [2023-12-02 13:31:41,020 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 98 mSDsluCounter, 186 mSDsCounter, 0 mSdLazyCounter, 681 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 104 SdHoareTripleChecker+Valid, 222 SdHoareTripleChecker+Invalid, 709 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 681 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-12-02 13:31:41,021 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [104 Valid, 222 Invalid, 709 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 681 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-12-02 13:31:41,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2023-12-02 13:31:41,051 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 159. [2023-12-02 13:31:41,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 159 states, 125 states have (on average 1.088) internal successors, (136), 123 states have internal predecessors, (136), 20 states have call successors, (20), 5 states have call predecessors, (20), 12 states have return successors, (89), 30 states have call predecessors, (89), 19 states have call successors, (89) [2023-12-02 13:31:41,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 245 transitions. [2023-12-02 13:31:41,056 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 245 transitions. Word has length 30 [2023-12-02 13:31:41,056 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 13:31:41,056 INFO L495 AbstractCegarLoop]: Abstraction has 159 states and 245 transitions. [2023-12-02 13:31:41,056 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 15 states have (on average 3.4) internal successors, (51), 14 states have internal predecessors, (51), 8 states have call successors, (11), 5 states have call predecessors, (11), 5 states have return successors, (6), 3 states have call predecessors, (6), 5 states have call successors, (6) [2023-12-02 13:31:41,056 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 245 transitions. [2023-12-02 13:31:41,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2023-12-02 13:31:41,058 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 13:31:41,059 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 4, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 13:31:41,063 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eeebd75c-4b30-4d55-93a6-cb1d2a15638f/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-12-02 13:31:41,263 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eeebd75c-4b30-4d55-93a6-cb1d2a15638f/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2023-12-02 13:31:41,263 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting fiboErr5ASSERT_VIOLATIONINTEGER_OVERFLOW === [fiboErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, fiboErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, fiboErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2023-12-02 13:31:41,264 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 13:31:41,264 INFO L85 PathProgramCache]: Analyzing trace with hash 1764922049, now seen corresponding path program 1 times [2023-12-02 13:31:41,264 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 13:31:41,264 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [393359226] [2023-12-02 13:31:41,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:31:41,264 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 13:31:41,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 13:31:41,344 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 65 trivial. 0 not checked. [2023-12-02 13:31:41,344 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 13:31:41,344 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [393359226] [2023-12-02 13:31:41,344 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [393359226] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 13:31:41,344 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 13:31:41,345 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-12-02 13:31:41,345 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2145307322] [2023-12-02 13:31:41,345 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 13:31:41,345 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-12-02 13:31:41,345 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 13:31:41,346 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-12-02 13:31:41,346 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-12-02 13:31:41,346 INFO L87 Difference]: Start difference. First operand 159 states and 245 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) [2023-12-02 13:31:41,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 13:31:41,384 INFO L93 Difference]: Finished difference Result 175 states and 267 transitions. [2023-12-02 13:31:41,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-12-02 13:31:41,385 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 43 [2023-12-02 13:31:41,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 13:31:41,387 INFO L225 Difference]: With dead ends: 175 [2023-12-02 13:31:41,388 INFO L226 Difference]: Without dead ends: 174 [2023-12-02 13:31:41,388 INFO L412 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 [2023-12-02 13:31:41,389 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 4 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 77 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-02 13:31:41,389 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 77 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-02 13:31:41,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2023-12-02 13:31:41,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 166. [2023-12-02 13:31:41,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 166 states, 131 states have (on average 1.083969465648855) internal successors, (142), 128 states have internal predecessors, (142), 21 states have call successors, (21), 5 states have call predecessors, (21), 12 states have return successors, (95), 32 states have call predecessors, (95), 20 states have call successors, (95) [2023-12-02 13:31:41,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 258 transitions. [2023-12-02 13:31:41,417 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 258 transitions. Word has length 43 [2023-12-02 13:31:41,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 13:31:41,418 INFO L495 AbstractCegarLoop]: Abstraction has 166 states and 258 transitions. [2023-12-02 13:31:41,418 INFO L496 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) [2023-12-02 13:31:41,418 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 258 transitions. [2023-12-02 13:31:41,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2023-12-02 13:31:41,422 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 13:31:41,422 INFO L195 NwaCegarLoop]: trace histogram [9, 7, 6, 6, 6, 6, 4, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2023-12-02 13:31:41,423 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-12-02 13:31:41,423 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting fiboErr4ASSERT_VIOLATIONINTEGER_OVERFLOW === [fiboErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, fiboErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, fiboErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2023-12-02 13:31:41,423 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 13:31:41,423 INFO L85 PathProgramCache]: Analyzing trace with hash -1176976461, now seen corresponding path program 1 times [2023-12-02 13:31:41,424 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 13:31:41,424 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1180519397] [2023-12-02 13:31:41,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:31:41,424 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 13:31:41,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 13:31:41,503 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2023-12-02 13:31:41,503 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 13:31:41,503 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1180519397] [2023-12-02 13:31:41,503 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1180519397] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 13:31:41,504 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1177645521] [2023-12-02 13:31:41,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:31:41,504 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 13:31:41,504 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eeebd75c-4b30-4d55-93a6-cb1d2a15638f/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 13:31:41,506 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eeebd75c-4b30-4d55-93a6-cb1d2a15638f/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 13:31:41,516 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eeebd75c-4b30-4d55-93a6-cb1d2a15638f/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-12-02 13:31:41,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 13:31:41,567 INFO L262 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 14 conjunts are in the unsatisfiable core [2023-12-02 13:31:41,571 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 13:31:41,781 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 69 proven. 72 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-12-02 13:31:41,781 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 13:31:42,008 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 69 proven. 72 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-12-02 13:31:42,008 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1177645521] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 13:31:42,008 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [15597057] [2023-12-02 13:31:42,011 INFO L159 IcfgInterpreter]: Started Sifa with 18 locations of interest [2023-12-02 13:31:42,011 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 13:31:42,011 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:337) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:431) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:366) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:415) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:262) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:175) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:154) 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) [2023-12-02 13:31:42,012 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-02 13:31:42,012 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 15, 15] total 22 [2023-12-02 13:31:42,012 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [927969254] [2023-12-02 13:31:42,012 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-02 13:31:42,013 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-12-02 13:31:42,013 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 13:31:42,014 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-12-02 13:31:42,014 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=387, Unknown=0, NotChecked=0, Total=462 [2023-12-02 13:31:42,015 INFO L87 Difference]: Start difference. First operand 166 states and 258 transitions. Second operand has 22 states, 20 states have (on average 3.8) internal successors, (76), 16 states have internal predecessors, (76), 11 states have call successors, (17), 7 states have call predecessors, (17), 3 states have return successors, (10), 6 states have call predecessors, (10), 5 states have call successors, (10) [2023-12-02 13:31:42,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 13:31:42,541 INFO L93 Difference]: Finished difference Result 307 states and 491 transitions. [2023-12-02 13:31:42,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2023-12-02 13:31:42,542 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 20 states have (on average 3.8) internal successors, (76), 16 states have internal predecessors, (76), 11 states have call successors, (17), 7 states have call predecessors, (17), 3 states have return successors, (10), 6 states have call predecessors, (10), 5 states have call successors, (10) Word has length 66 [2023-12-02 13:31:42,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 13:31:42,544 INFO L225 Difference]: With dead ends: 307 [2023-12-02 13:31:42,544 INFO L226 Difference]: Without dead ends: 157 [2023-12-02 13:31:42,548 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 108 SyntacticMatches, 9 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 236 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=416, Invalid=1066, Unknown=0, NotChecked=0, Total=1482 [2023-12-02 13:31:42,548 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 247 mSDsluCounter, 76 mSDsCounter, 0 mSdLazyCounter, 435 mSolverCounterSat, 69 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 247 SdHoareTripleChecker+Valid, 90 SdHoareTripleChecker+Invalid, 504 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 69 IncrementalHoareTripleChecker+Valid, 435 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-12-02 13:31:42,549 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [247 Valid, 90 Invalid, 504 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [69 Valid, 435 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-12-02 13:31:42,549 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2023-12-02 13:31:42,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 146. [2023-12-02 13:31:42,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 146 states, 115 states have (on average 1.0782608695652174) internal successors, (124), 114 states have internal predecessors, (124), 18 states have call successors, (18), 6 states have call predecessors, (18), 11 states have return successors, (34), 25 states have call predecessors, (34), 17 states have call successors, (34) [2023-12-02 13:31:42,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 176 transitions. [2023-12-02 13:31:42,565 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 176 transitions. Word has length 66 [2023-12-02 13:31:42,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 13:31:42,565 INFO L495 AbstractCegarLoop]: Abstraction has 146 states and 176 transitions. [2023-12-02 13:31:42,565 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 20 states have (on average 3.8) internal successors, (76), 16 states have internal predecessors, (76), 11 states have call successors, (17), 7 states have call predecessors, (17), 3 states have return successors, (10), 6 states have call predecessors, (10), 5 states have call successors, (10) [2023-12-02 13:31:42,565 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 176 transitions. [2023-12-02 13:31:42,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2023-12-02 13:31:42,567 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 13:31:42,568 INFO L195 NwaCegarLoop]: trace histogram [7, 5, 4, 4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1] [2023-12-02 13:31:42,573 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eeebd75c-4b30-4d55-93a6-cb1d2a15638f/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-12-02 13:31:42,770 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eeebd75c-4b30-4d55-93a6-cb1d2a15638f/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2023-12-02 13:31:42,770 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting fiboErr5ASSERT_VIOLATIONINTEGER_OVERFLOW === [fiboErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, fiboErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, fiboErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2023-12-02 13:31:42,771 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 13:31:42,771 INFO L85 PathProgramCache]: Analyzing trace with hash 1295832694, now seen corresponding path program 1 times [2023-12-02 13:31:42,771 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 13:31:42,771 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1074910249] [2023-12-02 13:31:42,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:31:42,771 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 13:31:42,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 13:31:42,858 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 20 proven. 9 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2023-12-02 13:31:42,858 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 13:31:42,859 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1074910249] [2023-12-02 13:31:42,859 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1074910249] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 13:31:42,859 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1931516932] [2023-12-02 13:31:42,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:31:42,859 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 13:31:42,859 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eeebd75c-4b30-4d55-93a6-cb1d2a15638f/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 13:31:42,861 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eeebd75c-4b30-4d55-93a6-cb1d2a15638f/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 13:31:42,864 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eeebd75c-4b30-4d55-93a6-cb1d2a15638f/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-12-02 13:31:42,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 13:31:42,913 INFO L262 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 12 conjunts are in the unsatisfiable core [2023-12-02 13:31:42,915 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 13:31:43,040 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 31 proven. 54 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-12-02 13:31:43,041 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 13:31:43,266 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 9 proven. 71 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-12-02 13:31:43,266 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1931516932] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 13:31:43,267 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1058535451] [2023-12-02 13:31:43,269 INFO L159 IcfgInterpreter]: Started Sifa with 18 locations of interest [2023-12-02 13:31:43,269 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 13:31:43,270 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:337) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:431) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:366) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:415) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:262) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:175) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:154) 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) [2023-12-02 13:31:43,270 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-02 13:31:43,270 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 12, 13] total 16 [2023-12-02 13:31:43,270 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2016100877] [2023-12-02 13:31:43,270 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-02 13:31:43,271 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-12-02 13:31:43,271 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 13:31:43,272 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-12-02 13:31:43,272 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2023-12-02 13:31:43,272 INFO L87 Difference]: Start difference. First operand 146 states and 176 transitions. Second operand has 16 states, 15 states have (on average 4.066666666666666) internal successors, (61), 13 states have internal predecessors, (61), 10 states have call successors, (12), 5 states have call predecessors, (12), 4 states have return successors, (8), 2 states have call predecessors, (8), 7 states have call successors, (8) [2023-12-02 13:31:43,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 13:31:43,462 INFO L93 Difference]: Finished difference Result 212 states and 255 transitions. [2023-12-02 13:31:43,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-12-02 13:31:43,462 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 4.066666666666666) internal successors, (61), 13 states have internal predecessors, (61), 10 states have call successors, (12), 5 states have call predecessors, (12), 4 states have return successors, (8), 2 states have call predecessors, (8), 7 states have call successors, (8) Word has length 55 [2023-12-02 13:31:43,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 13:31:43,464 INFO L225 Difference]: With dead ends: 212 [2023-12-02 13:31:43,464 INFO L226 Difference]: Without dead ends: 87 [2023-12-02 13:31:43,465 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 96 SyntacticMatches, 9 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=128, Invalid=378, Unknown=0, NotChecked=0, Total=506 [2023-12-02 13:31:43,466 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 110 mSDsluCounter, 123 mSDsCounter, 0 mSdLazyCounter, 195 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 110 SdHoareTripleChecker+Valid, 154 SdHoareTripleChecker+Invalid, 221 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 195 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 13:31:43,466 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [110 Valid, 154 Invalid, 221 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 195 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 13:31:43,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2023-12-02 13:31:43,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 84. [2023-12-02 13:31:43,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 65 states have (on average 1.0923076923076922) internal successors, (71), 67 states have internal predecessors, (71), 11 states have call successors, (11), 6 states have call predecessors, (11), 6 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2023-12-02 13:31:43,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 92 transitions. [2023-12-02 13:31:43,474 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 92 transitions. Word has length 55 [2023-12-02 13:31:43,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 13:31:43,474 INFO L495 AbstractCegarLoop]: Abstraction has 84 states and 92 transitions. [2023-12-02 13:31:43,474 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 4.066666666666666) internal successors, (61), 13 states have internal predecessors, (61), 10 states have call successors, (12), 5 states have call predecessors, (12), 4 states have return successors, (8), 2 states have call predecessors, (8), 7 states have call successors, (8) [2023-12-02 13:31:43,474 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 92 transitions. [2023-12-02 13:31:43,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2023-12-02 13:31:43,475 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 13:31:43,475 INFO L195 NwaCegarLoop]: trace histogram [7, 6, 4, 4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1] [2023-12-02 13:31:43,480 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eeebd75c-4b30-4d55-93a6-cb1d2a15638f/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-12-02 13:31:43,676 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eeebd75c-4b30-4d55-93a6-cb1d2a15638f/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2023-12-02 13:31:43,676 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting fiboErr5ASSERT_VIOLATIONINTEGER_OVERFLOW === [fiboErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, fiboErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, fiboErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2023-12-02 13:31:43,676 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 13:31:43,677 INFO L85 PathProgramCache]: Analyzing trace with hash -1324927863, now seen corresponding path program 2 times [2023-12-02 13:31:43,677 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 13:31:43,677 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1238493004] [2023-12-02 13:31:43,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:31:43,677 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 13:31:43,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 13:31:43,812 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 2 proven. 15 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2023-12-02 13:31:43,812 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 13:31:43,812 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1238493004] [2023-12-02 13:31:43,813 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1238493004] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 13:31:43,813 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1077878095] [2023-12-02 13:31:43,813 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-02 13:31:43,813 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 13:31:43,813 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eeebd75c-4b30-4d55-93a6-cb1d2a15638f/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 13:31:43,814 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eeebd75c-4b30-4d55-93a6-cb1d2a15638f/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 13:31:43,817 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eeebd75c-4b30-4d55-93a6-cb1d2a15638f/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-12-02 13:31:43,863 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-12-02 13:31:43,863 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 13:31:43,864 INFO L262 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2023-12-02 13:31:43,866 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 13:31:43,935 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 85 trivial. 0 not checked. [2023-12-02 13:31:43,935 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 13:31:44,117 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2023-12-02 13:31:44,117 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1077878095] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 13:31:44,117 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [62410273] [2023-12-02 13:31:44,119 INFO L159 IcfgInterpreter]: Started Sifa with 18 locations of interest [2023-12-02 13:31:44,120 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 13:31:44,120 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:337) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:431) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:366) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:415) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:262) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:175) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:154) 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) [2023-12-02 13:31:44,120 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-02 13:31:44,120 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6, 7] total 15 [2023-12-02 13:31:44,121 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1595387036] [2023-12-02 13:31:44,121 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-02 13:31:44,121 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-12-02 13:31:44,121 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 13:31:44,122 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-12-02 13:31:44,122 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=178, Unknown=0, NotChecked=0, Total=240 [2023-12-02 13:31:44,122 INFO L87 Difference]: Start difference. First operand 84 states and 92 transitions. Second operand has 16 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 16 states have internal predecessors, (43), 4 states have call successors, (5), 1 states have call predecessors, (5), 5 states have return successors, (9), 9 states have call predecessors, (9), 4 states have call successors, (9) [2023-12-02 13:31:44,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 13:31:44,209 INFO L93 Difference]: Finished difference Result 86 states and 92 transitions. [2023-12-02 13:31:44,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-12-02 13:31:44,209 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 16 states have internal predecessors, (43), 4 states have call successors, (5), 1 states have call predecessors, (5), 5 states have return successors, (9), 9 states have call predecessors, (9), 4 states have call successors, (9) Word has length 56 [2023-12-02 13:31:44,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 13:31:44,210 INFO L225 Difference]: With dead ends: 86 [2023-12-02 13:31:44,210 INFO L226 Difference]: Without dead ends: 85 [2023-12-02 13:31:44,211 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 103 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=91, Invalid=251, Unknown=0, NotChecked=0, Total=342 [2023-12-02 13:31:44,211 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 5 mSDsluCounter, 93 mSDsCounter, 0 mSdLazyCounter, 81 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 111 SdHoareTripleChecker+Invalid, 84 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 81 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 13:31:44,212 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 111 Invalid, 84 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 81 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 13:31:44,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2023-12-02 13:31:44,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 84. [2023-12-02 13:31:44,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 65 states have (on average 1.0461538461538462) internal successors, (68), 67 states have internal predecessors, (68), 11 states have call successors, (11), 6 states have call predecessors, (11), 6 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2023-12-02 13:31:44,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 89 transitions. [2023-12-02 13:31:44,218 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 89 transitions. Word has length 56 [2023-12-02 13:31:44,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 13:31:44,219 INFO L495 AbstractCegarLoop]: Abstraction has 84 states and 89 transitions. [2023-12-02 13:31:44,219 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 16 states have internal predecessors, (43), 4 states have call successors, (5), 1 states have call predecessors, (5), 5 states have return successors, (9), 9 states have call predecessors, (9), 4 states have call successors, (9) [2023-12-02 13:31:44,219 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 89 transitions. [2023-12-02 13:31:44,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2023-12-02 13:31:44,220 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 13:31:44,220 INFO L195 NwaCegarLoop]: trace histogram [10, 8, 8, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 1, 1, 1] [2023-12-02 13:31:44,225 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eeebd75c-4b30-4d55-93a6-cb1d2a15638f/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2023-12-02 13:31:44,421 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eeebd75c-4b30-4d55-93a6-cb1d2a15638f/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-12-02 13:31:44,421 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting fiboErr4ASSERT_VIOLATIONINTEGER_OVERFLOW === [fiboErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, fiboErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, fiboErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2023-12-02 13:31:44,421 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 13:31:44,422 INFO L85 PathProgramCache]: Analyzing trace with hash 1235250225, now seen corresponding path program 2 times [2023-12-02 13:31:44,422 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 13:31:44,422 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [407711161] [2023-12-02 13:31:44,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:31:44,422 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 13:31:44,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 13:31:44,657 INFO L134 CoverageAnalysis]: Checked inductivity of 243 backedges. 14 proven. 64 refuted. 0 times theorem prover too weak. 165 trivial. 0 not checked. [2023-12-02 13:31:44,658 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 13:31:44,658 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [407711161] [2023-12-02 13:31:44,658 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [407711161] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 13:31:44,658 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [898325770] [2023-12-02 13:31:44,658 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-02 13:31:44,658 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 13:31:44,658 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eeebd75c-4b30-4d55-93a6-cb1d2a15638f/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 13:31:44,659 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eeebd75c-4b30-4d55-93a6-cb1d2a15638f/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 13:31:44,664 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eeebd75c-4b30-4d55-93a6-cb1d2a15638f/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-12-02 13:31:44,724 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2023-12-02 13:31:44,724 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 13:31:44,725 INFO L262 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 8 conjunts are in the unsatisfiable core [2023-12-02 13:31:44,727 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 13:31:44,827 INFO L134 CoverageAnalysis]: Checked inductivity of 243 backedges. 60 proven. 4 refuted. 0 times theorem prover too weak. 179 trivial. 0 not checked. [2023-12-02 13:31:44,827 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 13:31:45,015 INFO L134 CoverageAnalysis]: Checked inductivity of 243 backedges. 60 proven. 4 refuted. 0 times theorem prover too weak. 179 trivial. 0 not checked. [2023-12-02 13:31:45,015 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [898325770] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 13:31:45,015 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1912002915] [2023-12-02 13:31:45,018 INFO L159 IcfgInterpreter]: Started Sifa with 18 locations of interest [2023-12-02 13:31:45,018 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 13:31:45,018 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:337) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:431) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:366) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:415) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:262) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:175) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:154) 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) [2023-12-02 13:31:45,018 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-02 13:31:45,018 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 7, 7] total 18 [2023-12-02 13:31:45,019 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [9373608] [2023-12-02 13:31:45,019 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-02 13:31:45,019 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-12-02 13:31:45,019 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 13:31:45,020 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-12-02 13:31:45,020 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=267, Unknown=0, NotChecked=0, Total=342 [2023-12-02 13:31:45,020 INFO L87 Difference]: Start difference. First operand 84 states and 89 transitions. Second operand has 19 states, 18 states have (on average 3.1666666666666665) internal successors, (57), 19 states have internal predecessors, (57), 6 states have call successors, (8), 1 states have call predecessors, (8), 6 states have return successors, (12), 11 states have call predecessors, (12), 6 states have call successors, (12) [2023-12-02 13:31:45,119 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 13:31:45,119 INFO L93 Difference]: Finished difference Result 84 states and 89 transitions. [2023-12-02 13:31:45,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-12-02 13:31:45,120 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 3.1666666666666665) internal successors, (57), 19 states have internal predecessors, (57), 6 states have call successors, (8), 1 states have call predecessors, (8), 6 states have return successors, (12), 11 states have call predecessors, (12), 6 states have call successors, (12) Word has length 88 [2023-12-02 13:31:45,120 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 13:31:45,121 INFO L225 Difference]: With dead ends: 84 [2023-12-02 13:31:45,121 INFO L226 Difference]: Without dead ends: 83 [2023-12-02 13:31:45,122 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 195 GetRequests, 171 SyntacticMatches, 4 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=110, Invalid=352, Unknown=0, NotChecked=0, Total=462 [2023-12-02 13:31:45,122 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 16 mSDsluCounter, 132 mSDsCounter, 0 mSdLazyCounter, 110 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 156 SdHoareTripleChecker+Invalid, 111 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 110 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 13:31:45,123 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 156 Invalid, 111 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 110 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 13:31:45,123 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2023-12-02 13:31:45,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 83. [2023-12-02 13:31:45,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 65 states have (on average 1.0153846153846153) internal successors, (66), 66 states have internal predecessors, (66), 11 states have call successors, (11), 6 states have call predecessors, (11), 6 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2023-12-02 13:31:45,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 87 transitions. [2023-12-02 13:31:45,129 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 87 transitions. Word has length 88 [2023-12-02 13:31:45,130 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 13:31:45,130 INFO L495 AbstractCegarLoop]: Abstraction has 83 states and 87 transitions. [2023-12-02 13:31:45,130 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 3.1666666666666665) internal successors, (57), 19 states have internal predecessors, (57), 6 states have call successors, (8), 1 states have call predecessors, (8), 6 states have return successors, (12), 11 states have call predecessors, (12), 6 states have call successors, (12) [2023-12-02 13:31:45,130 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 87 transitions. [2023-12-02 13:31:45,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2023-12-02 13:31:45,132 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 13:31:45,132 INFO L195 NwaCegarLoop]: trace histogram [15, 14, 12, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 5, 3, 1, 1, 1] [2023-12-02 13:31:45,137 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eeebd75c-4b30-4d55-93a6-cb1d2a15638f/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-12-02 13:31:45,332 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eeebd75c-4b30-4d55-93a6-cb1d2a15638f/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-12-02 13:31:45,333 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting fiboErr5ASSERT_VIOLATIONINTEGER_OVERFLOW === [fiboErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, fiboErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, fiboErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2023-12-02 13:31:45,333 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 13:31:45,333 INFO L85 PathProgramCache]: Analyzing trace with hash -1077195340, now seen corresponding path program 3 times [2023-12-02 13:31:45,333 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 13:31:45,333 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [560760674] [2023-12-02 13:31:45,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:31:45,334 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 13:31:45,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 13:31:45,958 INFO L134 CoverageAnalysis]: Checked inductivity of 668 backedges. 78 proven. 189 refuted. 0 times theorem prover too weak. 401 trivial. 0 not checked. [2023-12-02 13:31:45,958 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 13:31:45,958 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [560760674] [2023-12-02 13:31:45,958 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [560760674] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 13:31:45,958 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1250196299] [2023-12-02 13:31:45,958 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-12-02 13:31:45,958 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 13:31:45,959 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eeebd75c-4b30-4d55-93a6-cb1d2a15638f/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 13:31:45,959 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eeebd75c-4b30-4d55-93a6-cb1d2a15638f/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 13:31:45,962 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eeebd75c-4b30-4d55-93a6-cb1d2a15638f/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-12-02 13:31:46,040 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-12-02 13:31:46,040 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 13:31:46,042 INFO L262 TraceCheckSpWp]: Trace formula consists of 285 conjuncts, 29 conjunts are in the unsatisfiable core [2023-12-02 13:31:46,046 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 13:31:46,247 INFO L134 CoverageAnalysis]: Checked inductivity of 668 backedges. 78 proven. 135 refuted. 0 times theorem prover too weak. 455 trivial. 0 not checked. [2023-12-02 13:31:46,248 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 13:31:47,540 INFO L134 CoverageAnalysis]: Checked inductivity of 668 backedges. 144 proven. 128 refuted. 0 times theorem prover too weak. 396 trivial. 0 not checked. [2023-12-02 13:31:47,540 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1250196299] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 13:31:47,540 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [338042430] [2023-12-02 13:31:47,543 INFO L159 IcfgInterpreter]: Started Sifa with 18 locations of interest [2023-12-02 13:31:47,543 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 13:31:47,543 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:337) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:431) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:366) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:415) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:262) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:175) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:154) 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) [2023-12-02 13:31:47,543 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-02 13:31:47,544 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 17] total 31 [2023-12-02 13:31:47,544 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1372045347] [2023-12-02 13:31:47,544 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-02 13:31:47,545 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2023-12-02 13:31:47,545 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 13:31:47,546 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2023-12-02 13:31:47,546 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=232, Invalid=760, Unknown=0, NotChecked=0, Total=992 [2023-12-02 13:31:47,547 INFO L87 Difference]: Start difference. First operand 83 states and 87 transitions. Second operand has 32 states, 31 states have (on average 2.6774193548387095) internal successors, (83), 32 states have internal predecessors, (83), 8 states have call successors, (9), 1 states have call predecessors, (9), 9 states have return successors, (21), 21 states have call predecessors, (21), 8 states have call successors, (21) [2023-12-02 13:31:47,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 13:31:47,609 INFO L93 Difference]: Finished difference Result 83 states and 87 transitions. [2023-12-02 13:31:47,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-12-02 13:31:47,610 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 31 states have (on average 2.6774193548387095) internal successors, (83), 32 states have internal predecessors, (83), 8 states have call successors, (9), 1 states have call predecessors, (9), 9 states have return successors, (21), 21 states have call predecessors, (21), 8 states have call successors, (21) Word has length 142 [2023-12-02 13:31:47,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 13:31:47,610 INFO L225 Difference]: With dead ends: 83 [2023-12-02 13:31:47,610 INFO L226 Difference]: Without dead ends: 0 [2023-12-02 13:31:47,611 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 312 GetRequests, 268 SyntacticMatches, 13 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 675 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=252, Invalid=804, Unknown=0, NotChecked=0, Total=1056 [2023-12-02 13:31:47,612 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 2 mSDsluCounter, 112 mSDsCounter, 0 mSdLazyCounter, 77 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 129 SdHoareTripleChecker+Invalid, 78 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 77 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-02 13:31:47,612 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 129 Invalid, 78 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 77 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-02 13:31:47,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2023-12-02 13:31:47,613 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2023-12-02 13:31:47,613 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) [2023-12-02 13:31:47,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2023-12-02 13:31:47,613 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 142 [2023-12-02 13:31:47,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 13:31:47,613 INFO L495 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2023-12-02 13:31:47,614 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 31 states have (on average 2.6774193548387095) internal successors, (83), 32 states have internal predecessors, (83), 8 states have call successors, (9), 1 states have call predecessors, (9), 9 states have return successors, (21), 21 states have call predecessors, (21), 8 states have call successors, (21) [2023-12-02 13:31:47,614 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2023-12-02 13:31:47,614 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2023-12-02 13:31:47,616 INFO L805 garLoopResultBuilder]: Registering result SAFE for location fiboErr0ASSERT_VIOLATIONINTEGER_OVERFLOW (5 of 6 remaining) [2023-12-02 13:31:47,617 INFO L805 garLoopResultBuilder]: Registering result SAFE for location fiboErr1ASSERT_VIOLATIONINTEGER_OVERFLOW (4 of 6 remaining) [2023-12-02 13:31:47,617 INFO L805 garLoopResultBuilder]: Registering result SAFE for location fiboErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (3 of 6 remaining) [2023-12-02 13:31:47,617 INFO L805 garLoopResultBuilder]: Registering result SAFE for location fiboErr3ASSERT_VIOLATIONINTEGER_OVERFLOW (2 of 6 remaining) [2023-12-02 13:31:47,617 INFO L805 garLoopResultBuilder]: Registering result SAFE for location fiboErr4ASSERT_VIOLATIONINTEGER_OVERFLOW (1 of 6 remaining) [2023-12-02 13:31:47,617 INFO L805 garLoopResultBuilder]: Registering result SAFE for location fiboErr5ASSERT_VIOLATIONINTEGER_OVERFLOW (0 of 6 remaining) [2023-12-02 13:31:47,623 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eeebd75c-4b30-4d55-93a6-cb1d2a15638f/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-12-02 13:31:47,818 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eeebd75c-4b30-4d55-93a6-cb1d2a15638f/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-12-02 13:31:47,819 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2023-12-02 13:31:48,007 INFO L899 garLoopResultBuilder]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2023-12-02 13:31:48,008 INFO L895 garLoopResultBuilder]: At program point L27(line 27) the Hoare annotation is: (= 5 |ULTIMATE.start_main_~x~0#1|) [2023-12-02 13:31:48,008 INFO L899 garLoopResultBuilder]: For program point L27-1(line 27) no Hoare annotation was computed. [2023-12-02 13:31:48,008 INFO L899 garLoopResultBuilder]: For program point $Ultimate##0(line -1) no Hoare annotation was computed. [2023-12-02 13:31:48,008 INFO L899 garLoopResultBuilder]: For program point fiboErr2ASSERT_VIOLATIONINTEGER_OVERFLOW(line 13) no Hoare annotation was computed. [2023-12-02 13:31:48,008 INFO L899 garLoopResultBuilder]: For program point fiboErr4ASSERT_VIOLATIONINTEGER_OVERFLOW(line 13) no Hoare annotation was computed. [2023-12-02 13:31:48,008 INFO L899 garLoopResultBuilder]: For program point fiboErr0ASSERT_VIOLATIONINTEGER_OVERFLOW(line 13) no Hoare annotation was computed. [2023-12-02 13:31:48,008 INFO L899 garLoopResultBuilder]: For program point fiboFINAL(lines 7 15) no Hoare annotation was computed. [2023-12-02 13:31:48,008 INFO L899 garLoopResultBuilder]: For program point L13(line 13) no Hoare annotation was computed. [2023-12-02 13:31:48,008 INFO L899 garLoopResultBuilder]: For program point L13-1(line 13) no Hoare annotation was computed. [2023-12-02 13:31:48,009 INFO L895 garLoopResultBuilder]: At program point L13-2(line 13) the Hoare annotation is: (and (or (= fibo_~n |fibo_#in~n|) (< 5 |fibo_#in~n|)) (< 1 |fibo_#in~n|)) [2023-12-02 13:31:48,009 INFO L899 garLoopResultBuilder]: For program point L13-3(line 13) no Hoare annotation was computed. [2023-12-02 13:31:48,009 INFO L902 garLoopResultBuilder]: At program point $Ultimate##0(lines 7 15) the Hoare annotation is: true [2023-12-02 13:31:48,009 INFO L899 garLoopResultBuilder]: For program point L13-4(line 13) no Hoare annotation was computed. [2023-12-02 13:31:48,009 INFO L899 garLoopResultBuilder]: For program point L13-5(line 13) no Hoare annotation was computed. [2023-12-02 13:31:48,009 INFO L895 garLoopResultBuilder]: At program point L13-6(line 13) the Hoare annotation is: (let ((.cse0 (= fibo_~n |fibo_#in~n|))) (and (or (< |fibo_#in~n| 4) (< 4 |fibo_#in~n|) (and (= |fibo_#t~ret4| 2) .cse0)) (< 1 |fibo_#in~n|) (or (and .cse0 (<= 2 |fibo_#t~ret4|) (<= |fibo_#t~ret4| 3)) (< |fibo_#in~n| 5) (< 5 |fibo_#in~n|)) (or (< 3 |fibo_#in~n|) (and .cse0 (= |fibo_#t~ret4| 1))))) [2023-12-02 13:31:48,010 INFO L899 garLoopResultBuilder]: For program point L13-7(line 13) no Hoare annotation was computed. [2023-12-02 13:31:48,010 INFO L899 garLoopResultBuilder]: For program point L13-8(line 13) no Hoare annotation was computed. [2023-12-02 13:31:48,010 INFO L899 garLoopResultBuilder]: For program point L13-9(line 13) no Hoare annotation was computed. [2023-12-02 13:31:48,010 INFO L899 garLoopResultBuilder]: For program point fiboEXIT(lines 7 15) no Hoare annotation was computed. [2023-12-02 13:31:48,010 INFO L899 garLoopResultBuilder]: For program point fiboErr1ASSERT_VIOLATIONINTEGER_OVERFLOW(line 13) no Hoare annotation was computed. [2023-12-02 13:31:48,010 INFO L899 garLoopResultBuilder]: For program point fiboErr3ASSERT_VIOLATIONINTEGER_OVERFLOW(line 13) no Hoare annotation was computed. [2023-12-02 13:31:48,011 INFO L899 garLoopResultBuilder]: For program point L10(lines 10 14) no Hoare annotation was computed. [2023-12-02 13:31:48,011 INFO L899 garLoopResultBuilder]: For program point L8(lines 8 14) no Hoare annotation was computed. [2023-12-02 13:31:48,011 INFO L899 garLoopResultBuilder]: For program point fiboErr5ASSERT_VIOLATIONINTEGER_OVERFLOW(line 13) no Hoare annotation was computed. [2023-12-02 13:31:48,014 INFO L445 BasicCegarLoop]: Path program histogram: [3, 2, 2, 1, 1, 1, 1, 1] [2023-12-02 13:31:48,015 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-12-02 13:31:48,019 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 02.12 01:31:48 BoogieIcfgContainer [2023-12-02 13:31:48,019 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-12-02 13:31:48,019 INFO L112 PluginConnector]: ------------------------Witness Printer---------------------------- [2023-12-02 13:31:48,020 INFO L270 PluginConnector]: Initializing Witness Printer... [2023-12-02 13:31:48,020 INFO L274 PluginConnector]: Witness Printer initialized [2023-12-02 13:31:48,020 INFO L184 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 01:31:37" (3/4) ... [2023-12-02 13:31:48,022 INFO L137 WitnessPrinter]: Generating witness for correct program [2023-12-02 13:31:48,025 INFO L361 RCFGBacktranslator]: Ignoring RootEdge to procedure fibo [2023-12-02 13:31:48,028 INFO L943 BoogieBacktranslator]: Reduced CFG by removing 17 nodes and edges [2023-12-02 13:31:48,028 INFO L943 BoogieBacktranslator]: Reduced CFG by removing 5 nodes and edges [2023-12-02 13:31:48,029 INFO L943 BoogieBacktranslator]: Reduced CFG by removing 3 nodes and edges [2023-12-02 13:31:48,029 INFO L943 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2023-12-02 13:31:48,102 INFO L149 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eeebd75c-4b30-4d55-93a6-cb1d2a15638f/bin/utaipan-verify-nQ1chXbOIh/witness.graphml [2023-12-02 13:31:48,102 INFO L149 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eeebd75c-4b30-4d55-93a6-cb1d2a15638f/bin/utaipan-verify-nQ1chXbOIh/witness.yml [2023-12-02 13:31:48,103 INFO L131 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2023-12-02 13:31:48,103 INFO L158 Benchmark]: Toolchain (without parser) took 10750.33ms. Allocated memory was 144.7MB in the beginning and 209.7MB in the end (delta: 65.0MB). Free memory was 108.1MB in the beginning and 178.9MB in the end (delta: -70.9MB). Peak memory consumption was 114.6MB. Max. memory is 16.1GB. [2023-12-02 13:31:48,104 INFO L158 Benchmark]: CDTParser took 0.18ms. Allocated memory is still 144.7MB. Free memory is still 118.3MB. There was no memory consumed. Max. memory is 16.1GB. [2023-12-02 13:31:48,104 INFO L158 Benchmark]: CACSL2BoogieTranslator took 168.81ms. Allocated memory is still 144.7MB. Free memory was 108.1MB in the beginning and 98.1MB in the end (delta: 10.0MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2023-12-02 13:31:48,105 INFO L158 Benchmark]: Boogie Procedure Inliner took 24.05ms. Allocated memory is still 144.7MB. Free memory was 98.1MB in the beginning and 96.9MB in the end (delta: 1.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2023-12-02 13:31:48,105 INFO L158 Benchmark]: Boogie Preprocessor took 15.24ms. Allocated memory is still 144.7MB. Free memory was 96.5MB in the beginning and 95.5MB in the end (delta: 962.9kB). There was no memory consumed. Max. memory is 16.1GB. [2023-12-02 13:31:48,105 INFO L158 Benchmark]: RCFGBuilder took 263.09ms. Allocated memory is still 144.7MB. Free memory was 95.5MB in the beginning and 84.4MB in the end (delta: 11.1MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2023-12-02 13:31:48,106 INFO L158 Benchmark]: TraceAbstraction took 10189.94ms. Allocated memory was 144.7MB in the beginning and 209.7MB in the end (delta: 65.0MB). Free memory was 83.4MB in the beginning and 64.4MB in the end (delta: 19.0MB). Peak memory consumption was 86.5MB. Max. memory is 16.1GB. [2023-12-02 13:31:48,106 INFO L158 Benchmark]: Witness Printer took 83.21ms. Allocated memory is still 209.7MB. Free memory was 64.4MB in the beginning and 178.9MB in the end (delta: -114.5MB). Peak memory consumption was 2.9MB. Max. memory is 16.1GB. [2023-12-02 13:31:48,108 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.18ms. Allocated memory is still 144.7MB. Free memory is still 118.3MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 168.81ms. Allocated memory is still 144.7MB. Free memory was 108.1MB in the beginning and 98.1MB in the end (delta: 10.0MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 24.05ms. Allocated memory is still 144.7MB. Free memory was 98.1MB in the beginning and 96.9MB in the end (delta: 1.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 15.24ms. Allocated memory is still 144.7MB. Free memory was 96.5MB in the beginning and 95.5MB in the end (delta: 962.9kB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 263.09ms. Allocated memory is still 144.7MB. Free memory was 95.5MB in the beginning and 84.4MB in the end (delta: 11.1MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * TraceAbstraction took 10189.94ms. Allocated memory was 144.7MB in the beginning and 209.7MB in the end (delta: 65.0MB). Free memory was 83.4MB in the beginning and 64.4MB in the end (delta: 19.0MB). Peak memory consumption was 86.5MB. Max. memory is 16.1GB. * Witness Printer took 83.21ms. Allocated memory is still 209.7MB. Free memory was 64.4MB in the beginning and 178.9MB in the end (delta: -114.5MB). Peak memory consumption was 2.9MB. 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: 13]: integer overflow can never occur For all program executions holds that integer overflow can never occur at this location - PositiveResult [Line: 13]: integer overflow can never occur For all program executions holds that integer overflow can never occur at this location - PositiveResult [Line: 13]: integer overflow can never occur For all program executions holds that integer overflow can never occur at this location - PositiveResult [Line: 13]: integer overflow can never occur For all program executions holds that integer overflow can never occur at this location - PositiveResult [Line: 13]: integer overflow can never occur For all program executions holds that integer overflow can never occur at this location - PositiveResult [Line: 13]: 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 2 procedures, 25 locations, 6 error locations. Started 1 CEGAR loops. OverallTime: 10.1s, OverallIterations: 12, TraceHistogramMax: 15, PathProgramHistogramMax: 3, EmptinessCheckTime: 0.0s, AutomataDifference: 2.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.2s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 679 SdHoareTripleChecker+Valid, 1.3s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 656 mSDsluCounter, 1240 SdHoareTripleChecker+Invalid, 1.1s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 988 mSDsCounter, 188 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 2090 IncrementalHoareTripleChecker+Invalid, 2278 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 188 mSolverCounterUnsat, 252 mSDtfsCounter, 2090 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 1098 GetRequests, 867 SyntacticMatches, 41 SemanticMatches, 190 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1429 ImplicationChecksByTransitivity, 1.9s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=166occurred in iteration=7, InterpolantAutomatonStates: 129, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.2s AutomataMinimizationTime, 12 MinimizatonAttempts, 94 StatesRemovedByMinimization, 9 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 4 LocationsWithAnnotation, 163 PreInvPairs, 182 NumberOfFragments, 61 HoareAnnotationTreeSize, 163 FomulaSimplifications, 588 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 4 FomulaSimplificationsInter, 337 FormulaSimplificationTreeSizeReductionInter, 0.2s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.3s SatisfiabilityAnalysisTime, 5.0s InterpolantComputationTime, 1056 NumberOfCodeBlocks, 981 NumberOfCodeBlocksAsserted, 28 NumberOfCheckSat, 1489 ConstructedInterpolants, 0 QuantifiedInterpolants, 3311 SizeOfPredicates, 16 NumberOfNonLiveVariables, 944 ConjunctsInSsa, 90 ConjunctsInUnsatCore, 27 InterpolantComputations, 5 PerfectInterpolantSequences, 3062/3950 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 6 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2023-12-02 13:31:48,124 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eeebd75c-4b30-4d55-93a6-cb1d2a15638f/bin/utaipan-verify-nQ1chXbOIh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Ended with exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: TRUE