./Ultimate.py --spec ../../sv-benchmarks/c/properties/no-overflow.prp --file ../../sv-benchmarks/c/recursive/Fibonacci04.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for overflows Using default analysis Version 527bcce2 Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c494986-8e10-4922-9ff4-acc33e77d1d9/bin/uautomizer-verify-bycVGegfSx/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c494986-8e10-4922-9ff4-acc33e77d1d9/bin/uautomizer-verify-bycVGegfSx/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c494986-8e10-4922-9ff4-acc33e77d1d9/bin/uautomizer-verify-bycVGegfSx/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c494986-8e10-4922-9ff4-acc33e77d1d9/bin/uautomizer-verify-bycVGegfSx/config/AutomizerReach.xml -i ../../sv-benchmarks/c/recursive/Fibonacci04.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c494986-8e10-4922-9ff4-acc33e77d1d9/bin/uautomizer-verify-bycVGegfSx/config/svcomp-Overflow-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c494986-8e10-4922-9ff4-acc33e77d1d9/bin/uautomizer-verify-bycVGegfSx --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! overflow) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 8d19306ce3d42a6a85ce0e73aaa2bade9eaab24620b40f9180d62be222dc7b30 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-527bcce [2023-11-21 22:06:14,502 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-21 22:06:14,589 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c494986-8e10-4922-9ff4-acc33e77d1d9/bin/uautomizer-verify-bycVGegfSx/config/svcomp-Overflow-32bit-Automizer_Default.epf [2023-11-21 22:06:14,595 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-21 22:06:14,596 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-21 22:06:14,631 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-21 22:06:14,632 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-21 22:06:14,632 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-21 22:06:14,633 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-21 22:06:14,634 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-21 22:06:14,637 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-21 22:06:14,639 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-21 22:06:14,640 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-21 22:06:14,645 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-21 22:06:14,645 INFO L153 SettingsManager]: * Use SBE=true [2023-11-21 22:06:14,646 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-21 22:06:14,647 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-21 22:06:14,648 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-21 22:06:14,649 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-21 22:06:14,649 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-21 22:06:14,649 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-21 22:06:14,650 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-21 22:06:14,650 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-21 22:06:14,651 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-21 22:06:14,651 INFO L153 SettingsManager]: * Check absence of signed integer overflows=true [2023-11-21 22:06:14,651 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-21 22:06:14,652 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-21 22:06:14,652 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-21 22:06:14,653 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-21 22:06:14,653 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-21 22:06:14,655 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-21 22:06:14,655 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-21 22:06:14,655 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-21 22:06:14,655 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-21 22:06:14,656 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-21 22:06:14,656 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-21 22:06:14,656 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-21 22:06:14,656 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-21 22:06:14,656 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-21 22:06:14,657 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-21 22:06:14,657 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-21 22:06:14,657 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-21 22:06:14,657 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-21 22:06:14,658 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-21 22:06:14,658 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC 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_1c494986-8e10-4922-9ff4-acc33e77d1d9/bin/uautomizer-verify-bycVGegfSx/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c494986-8e10-4922-9ff4-acc33e77d1d9/bin/uautomizer-verify-bycVGegfSx Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! overflow) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 8d19306ce3d42a6a85ce0e73aaa2bade9eaab24620b40f9180d62be222dc7b30 [2023-11-21 22:06:14,999 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-21 22:06:15,057 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-21 22:06:15,059 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-21 22:06:15,060 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-21 22:06:15,061 INFO L274 PluginConnector]: CDTParser initialized [2023-11-21 22:06:15,062 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c494986-8e10-4922-9ff4-acc33e77d1d9/bin/uautomizer-verify-bycVGegfSx/../../sv-benchmarks/c/recursive/Fibonacci04.c [2023-11-21 22:06:18,003 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-21 22:06:18,227 INFO L384 CDTParser]: Found 1 translation units. [2023-11-21 22:06:18,228 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c494986-8e10-4922-9ff4-acc33e77d1d9/sv-benchmarks/c/recursive/Fibonacci04.c [2023-11-21 22:06:18,238 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c494986-8e10-4922-9ff4-acc33e77d1d9/bin/uautomizer-verify-bycVGegfSx/data/1a51ff460/c7bfc24fbc3f43f2b25561cdf1522203/FLAGb4444519e [2023-11-21 22:06:18,263 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c494986-8e10-4922-9ff4-acc33e77d1d9/bin/uautomizer-verify-bycVGegfSx/data/1a51ff460/c7bfc24fbc3f43f2b25561cdf1522203 [2023-11-21 22:06:18,269 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-21 22:06:18,273 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-21 22:06:18,279 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-21 22:06:18,280 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-21 22:06:18,295 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-21 22:06:18,296 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 10:06:18" (1/1) ... [2023-11-21 22:06:18,297 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6fceacb5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:06:18, skipping insertion in model container [2023-11-21 22:06:18,298 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 10:06:18" (1/1) ... [2023-11-21 22:06:18,322 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-21 22:06:18,532 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-21 22:06:18,545 INFO L202 MainTranslator]: Completed pre-run [2023-11-21 22:06:18,565 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-21 22:06:18,582 INFO L206 MainTranslator]: Completed translation [2023-11-21 22:06:18,582 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:06:18 WrapperNode [2023-11-21 22:06:18,582 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-21 22:06:18,584 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-21 22:06:18,584 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-21 22:06:18,584 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-21 22:06:18,592 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:06:18" (1/1) ... [2023-11-21 22:06:18,599 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:06:18" (1/1) ... [2023-11-21 22:06:18,617 INFO L138 Inliner]: procedures = 13, calls = 11, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 24 [2023-11-21 22:06:18,617 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-21 22:06:18,618 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-21 22:06:18,618 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-21 22:06:18,619 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-21 22:06:18,631 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:06:18" (1/1) ... [2023-11-21 22:06:18,632 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:06:18" (1/1) ... [2023-11-21 22:06:18,643 INFO L184 PluginConnector]: Executing the observer HeapSplitter from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:06:18" (1/1) ... [2023-11-21 22:06:18,652 INFO L187 HeapSplitter]: Split 2 memory accesses to 1 slices as follows [2] [2023-11-21 22:06:18,653 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:06:18" (1/1) ... [2023-11-21 22:06:18,653 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:06:18" (1/1) ... [2023-11-21 22:06:18,663 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:06:18" (1/1) ... [2023-11-21 22:06:18,666 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:06:18" (1/1) ... [2023-11-21 22:06:18,672 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:06:18" (1/1) ... [2023-11-21 22:06:18,673 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:06:18" (1/1) ... [2023-11-21 22:06:18,677 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-21 22:06:18,679 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-21 22:06:18,680 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-21 22:06:18,680 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-21 22:06:18,682 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:06:18" (1/1) ... [2023-11-21 22:06:18,688 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-21 22:06:18,701 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c494986-8e10-4922-9ff4-acc33e77d1d9/bin/uautomizer-verify-bycVGegfSx/z3 [2023-11-21 22:06:18,716 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c494986-8e10-4922-9ff4-acc33e77d1d9/bin/uautomizer-verify-bycVGegfSx/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-21 22:06:18,754 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c494986-8e10-4922-9ff4-acc33e77d1d9/bin/uautomizer-verify-bycVGegfSx/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-21 22:06:18,768 INFO L130 BoogieDeclarations]: Found specification of procedure fibonacci [2023-11-21 22:06:18,769 INFO L138 BoogieDeclarations]: Found implementation of procedure fibonacci [2023-11-21 22:06:18,769 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-21 22:06:18,769 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-21 22:06:18,769 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-21 22:06:18,770 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-11-21 22:06:18,848 INFO L240 CfgBuilder]: Building ICFG [2023-11-21 22:06:18,851 INFO L266 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-21 22:06:19,017 INFO L281 CfgBuilder]: Performing block encoding [2023-11-21 22:06:19,069 INFO L303 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-21 22:06:19,070 INFO L308 CfgBuilder]: Removed 0 assume(true) statements. [2023-11-21 22:06:19,071 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 10:06:19 BoogieIcfgContainer [2023-11-21 22:06:19,072 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-21 22:06:19,075 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-21 22:06:19,076 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-21 22:06:19,088 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-21 22:06:19,088 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.11 10:06:18" (1/3) ... [2023-11-21 22:06:19,089 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3a755bff and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 10:06:19, skipping insertion in model container [2023-11-21 22:06:19,089 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:06:18" (2/3) ... [2023-11-21 22:06:19,089 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3a755bff and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 10:06:19, skipping insertion in model container [2023-11-21 22:06:19,090 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 10:06:19" (3/3) ... [2023-11-21 22:06:19,091 INFO L112 eAbstractionObserver]: Analyzing ICFG Fibonacci04.c [2023-11-21 22:06:19,135 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-21 22:06:19,135 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 6 error locations. [2023-11-21 22:06:19,202 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-21 22:06:19,210 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=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopHeads, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@59cc7f94, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-21 22:06:19,210 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2023-11-21 22:06:19,214 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) [2023-11-21 22:06:19,221 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2023-11-21 22:06:19,222 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 22:06:19,223 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2023-11-21 22:06:19,223 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting fibonacciErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [fibonacciErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2023-11-21 22:06:19,228 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:06:19,229 INFO L85 PathProgramCache]: Analyzing trace with hash -1961225628, now seen corresponding path program 1 times [2023-11-21 22:06:19,236 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 22:06:19,236 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [357584630] [2023-11-21 22:06:19,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:06:19,237 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 22:06:19,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:06:19,444 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 22:06:19,445 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 22:06:19,445 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [357584630] [2023-11-21 22:06:19,446 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [357584630] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 22:06:19,446 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 22:06:19,446 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-21 22:06:19,448 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1619542512] [2023-11-21 22:06:19,451 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 22:06:19,455 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-21 22:06:19,456 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 22:06:19,498 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-21 22:06:19,499 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-21 22:06:19,502 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) [2023-11-21 22:06:19,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 22:06:19,597 INFO L93 Difference]: Finished difference Result 27 states and 32 transitions. [2023-11-21 22:06:19,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-21 22:06:19,602 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 [2023-11-21 22:06:19,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 22:06:19,611 INFO L225 Difference]: With dead ends: 27 [2023-11-21 22:06:19,611 INFO L226 Difference]: Without dead ends: 23 [2023-11-21 22:06:19,614 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 [2023-11-21 22:06:19,618 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, 0.1s IncrementalHoareTripleChecker+Time [2023-11-21 22:06:19,619 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 26 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-21 22:06:19,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2023-11-21 22:06:19,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 21. [2023-11-21 22:06:19,661 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) [2023-11-21 22:06:19,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 24 transitions. [2023-11-21 22:06:19,666 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 24 transitions. Word has length 6 [2023-11-21 22:06:19,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 22:06:19,666 INFO L495 AbstractCegarLoop]: Abstraction has 21 states and 24 transitions. [2023-11-21 22:06:19,668 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) [2023-11-21 22:06:19,668 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 24 transitions. [2023-11-21 22:06:19,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2023-11-21 22:06:19,671 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 22:06:19,671 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-11-21 22:06:19,672 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-21 22:06:19,672 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting fibonacciErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [fibonacciErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2023-11-21 22:06:19,673 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:06:19,673 INFO L85 PathProgramCache]: Analyzing trace with hash -668452282, now seen corresponding path program 1 times [2023-11-21 22:06:19,674 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 22:06:19,674 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [162403507] [2023-11-21 22:06:19,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:06:19,675 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 22:06:19,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:06:19,793 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 22:06:19,793 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 22:06:19,793 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [162403507] [2023-11-21 22:06:19,794 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [162403507] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 22:06:19,794 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 22:06:19,794 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-21 22:06:19,794 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1246234807] [2023-11-21 22:06:19,795 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 22:06:19,796 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-21 22:06:19,796 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 22:06:19,797 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-21 22:06:19,797 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-21 22:06:19,798 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) [2023-11-21 22:06:19,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 22:06:19,859 INFO L93 Difference]: Finished difference Result 21 states and 24 transitions. [2023-11-21 22:06:19,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-21 22:06:19,860 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 [2023-11-21 22:06:19,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 22:06:19,861 INFO L225 Difference]: With dead ends: 21 [2023-11-21 22:06:19,861 INFO L226 Difference]: Without dead ends: 19 [2023-11-21 22:06:19,862 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 [2023-11-21 22:06:19,864 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 [2023-11-21 22:06:19,865 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] [2023-11-21 22:06:19,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2023-11-21 22:06:19,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2023-11-21 22:06:19,870 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) [2023-11-21 22:06:19,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 22 transitions. [2023-11-21 22:06:19,872 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 22 transitions. Word has length 7 [2023-11-21 22:06:19,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 22:06:19,872 INFO L495 AbstractCegarLoop]: Abstraction has 19 states and 22 transitions. [2023-11-21 22:06:19,873 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) [2023-11-21 22:06:19,873 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 22 transitions. [2023-11-21 22:06:19,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2023-11-21 22:06:19,874 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 22:06:19,875 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 22:06:19,875 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-21 22:06:19,875 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting fibonacciErr4ASSERT_VIOLATIONINTEGER_OVERFLOW === [fibonacciErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2023-11-21 22:06:19,876 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:06:19,876 INFO L85 PathProgramCache]: Analyzing trace with hash -462692464, now seen corresponding path program 1 times [2023-11-21 22:06:19,877 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 22:06:19,877 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2054959184] [2023-11-21 22:06:19,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:06:19,878 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 22:06:19,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:06:20,103 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-11-21 22:06:20,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:06:20,163 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2023-11-21 22:06:20,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:06:20,216 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-11-21 22:06:20,217 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 22:06:20,217 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2054959184] [2023-11-21 22:06:20,218 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2054959184] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 22:06:20,218 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 22:06:20,220 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-21 22:06:20,220 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [305289068] [2023-11-21 22:06:20,221 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 22:06:20,221 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-21 22:06:20,222 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 22:06:20,223 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-21 22:06:20,224 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-21 22:06:20,225 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) [2023-11-21 22:06:20,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 22:06:20,306 INFO L93 Difference]: Finished difference Result 35 states and 41 transitions. [2023-11-21 22:06:20,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-21 22:06:20,307 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 [2023-11-21 22:06:20,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 22:06:20,308 INFO L225 Difference]: With dead ends: 35 [2023-11-21 22:06:20,322 INFO L226 Difference]: Without dead ends: 33 [2023-11-21 22:06:20,323 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-21 22:06:20,324 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 6 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-21 22:06:20,325 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 46 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-21 22:06:20,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2023-11-21 22:06:20,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 28. [2023-11-21 22:06:20,341 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) [2023-11-21 22:06:20,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 34 transitions. [2023-11-21 22:06:20,348 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 34 transitions. Word has length 22 [2023-11-21 22:06:20,350 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 22:06:20,350 INFO L495 AbstractCegarLoop]: Abstraction has 28 states and 34 transitions. [2023-11-21 22:06:20,350 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) [2023-11-21 22:06:20,351 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 34 transitions. [2023-11-21 22:06:20,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2023-11-21 22:06:20,353 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 22:06:20,353 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 22:06:20,354 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-21 22:06:20,354 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting fibonacciErr4ASSERT_VIOLATIONINTEGER_OVERFLOW === [fibonacciErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2023-11-21 22:06:20,355 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:06:20,355 INFO L85 PathProgramCache]: Analyzing trace with hash -87456259, now seen corresponding path program 1 times [2023-11-21 22:06:20,355 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 22:06:20,356 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1541693844] [2023-11-21 22:06:20,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:06:20,356 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 22:06:20,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:06:20,510 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2023-11-21 22:06:20,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:06:20,552 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2023-11-21 22:06:20,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:06:20,605 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-11-21 22:06:20,605 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 22:06:20,605 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1541693844] [2023-11-21 22:06:20,606 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1541693844] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-21 22:06:20,606 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [462207818] [2023-11-21 22:06:20,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:06:20,607 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 22:06:20,607 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c494986-8e10-4922-9ff4-acc33e77d1d9/bin/uautomizer-verify-bycVGegfSx/z3 [2023-11-21 22:06:20,609 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c494986-8e10-4922-9ff4-acc33e77d1d9/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-21 22:06:20,615 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c494986-8e10-4922-9ff4-acc33e77d1d9/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-21 22:06:20,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:06:20,682 INFO L262 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-21 22:06:20,688 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 22:06:20,826 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-11-21 22:06:20,827 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-21 22:06:21,001 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-11-21 22:06:21,001 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [462207818] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-21 22:06:21,002 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-21 22:06:21,002 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 7, 7] total 15 [2023-11-21 22:06:21,002 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1227721575] [2023-11-21 22:06:21,003 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-21 22:06:21,004 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-11-21 22:06:21,004 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 22:06:21,005 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-11-21 22:06:21,006 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2023-11-21 22:06:21,006 INFO L87 Difference]: Start difference. First operand 28 states and 34 transitions. Second operand has 15 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 15 states have internal predecessors, (35), 4 states have call successors, (5), 1 states have call predecessors, (5), 5 states have return successors, (6), 5 states have call predecessors, (6), 4 states have call successors, (6) [2023-11-21 22:06:21,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 22:06:21,327 INFO L93 Difference]: Finished difference Result 89 states and 127 transitions. [2023-11-21 22:06:21,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-21 22:06:21,328 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 15 states have internal predecessors, (35), 4 states have call successors, (5), 1 states have call predecessors, (5), 5 states have return successors, (6), 5 states have call predecessors, (6), 4 states have call successors, (6) Word has length 29 [2023-11-21 22:06:21,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 22:06:21,330 INFO L225 Difference]: With dead ends: 89 [2023-11-21 22:06:21,331 INFO L226 Difference]: Without dead ends: 63 [2023-11-21 22:06:21,333 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 52 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=126, Invalid=380, Unknown=0, NotChecked=0, Total=506 [2023-11-21 22:06:21,335 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 112 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 181 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 112 SdHoareTripleChecker+Valid, 59 SdHoareTripleChecker+Invalid, 221 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 181 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-21 22:06:21,335 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [112 Valid, 59 Invalid, 221 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 181 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-21 22:06:21,337 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2023-11-21 22:06:21,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 51. [2023-11-21 22:06:21,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 37 states have (on average 1.1081081081081081) internal successors, (41), 40 states have internal predecessors, (41), 7 states have call successors, (7), 2 states have call predecessors, (7), 5 states have return successors, (18), 8 states have call predecessors, (18), 6 states have call successors, (18) [2023-11-21 22:06:21,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 66 transitions. [2023-11-21 22:06:21,352 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 66 transitions. Word has length 29 [2023-11-21 22:06:21,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 22:06:21,353 INFO L495 AbstractCegarLoop]: Abstraction has 51 states and 66 transitions. [2023-11-21 22:06:21,354 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 15 states have internal predecessors, (35), 4 states have call successors, (5), 1 states have call predecessors, (5), 5 states have return successors, (6), 5 states have call predecessors, (6), 4 states have call successors, (6) [2023-11-21 22:06:21,354 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 66 transitions. [2023-11-21 22:06:21,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2023-11-21 22:06:21,356 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 22:06:21,356 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 22:06:21,383 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c494986-8e10-4922-9ff4-acc33e77d1d9/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-21 22:06:21,576 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c494986-8e10-4922-9ff4-acc33e77d1d9/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 22:06:21,577 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting fibonacciErr4ASSERT_VIOLATIONINTEGER_OVERFLOW === [fibonacciErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2023-11-21 22:06:21,577 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:06:21,578 INFO L85 PathProgramCache]: Analyzing trace with hash -426489592, now seen corresponding path program 2 times [2023-11-21 22:06:21,578 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 22:06:21,578 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [713500264] [2023-11-21 22:06:21,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:06:21,579 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 22:06:21,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:06:21,641 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-11-21 22:06:21,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:06:21,657 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-11-21 22:06:21,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:06:21,675 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-11-21 22:06:21,676 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 22:06:21,676 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [713500264] [2023-11-21 22:06:21,676 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [713500264] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-21 22:06:21,676 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [378014772] [2023-11-21 22:06:21,677 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-21 22:06:21,677 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 22:06:21,677 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c494986-8e10-4922-9ff4-acc33e77d1d9/bin/uautomizer-verify-bycVGegfSx/z3 [2023-11-21 22:06:21,678 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c494986-8e10-4922-9ff4-acc33e77d1d9/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-21 22:06:21,682 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c494986-8e10-4922-9ff4-acc33e77d1d9/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-21 22:06:21,725 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-21 22:06:21,726 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-21 22:06:21,727 INFO L262 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-21 22:06:21,728 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 22:06:21,794 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-11-21 22:06:21,794 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-21 22:06:21,795 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [378014772] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 22:06:21,795 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-21 22:06:21,795 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 8 [2023-11-21 22:06:21,796 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [648267977] [2023-11-21 22:06:21,796 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 22:06:21,796 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-21 22:06:21,796 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 22:06:21,797 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-21 22:06:21,797 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2023-11-21 22:06:21,798 INFO L87 Difference]: Start difference. First operand 51 states and 66 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) [2023-11-21 22:06:21,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 22:06:21,832 INFO L93 Difference]: Finished difference Result 59 states and 74 transitions. [2023-11-21 22:06:21,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-21 22:06:21,833 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 23 [2023-11-21 22:06:21,833 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 22:06:21,835 INFO L225 Difference]: With dead ends: 59 [2023-11-21 22:06:21,835 INFO L226 Difference]: Without dead ends: 58 [2023-11-21 22:06:21,836 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2023-11-21 22:06:21,837 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 [2023-11-21 22:06:21,838 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] [2023-11-21 22:06:21,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2023-11-21 22:06:21,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 53. [2023-11-21 22:06:21,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 39 states have (on average 1.1025641025641026) internal successors, (43), 41 states have internal predecessors, (43), 7 states have call successors, (7), 2 states have call predecessors, (7), 5 states have return successors, (18), 9 states have call predecessors, (18), 6 states have call successors, (18) [2023-11-21 22:06:21,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 68 transitions. [2023-11-21 22:06:21,851 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 68 transitions. Word has length 23 [2023-11-21 22:06:21,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 22:06:21,851 INFO L495 AbstractCegarLoop]: Abstraction has 53 states and 68 transitions. [2023-11-21 22:06:21,851 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) [2023-11-21 22:06:21,852 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 68 transitions. [2023-11-21 22:06:21,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2023-11-21 22:06:21,853 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 22:06:21,853 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] [2023-11-21 22:06:21,882 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c494986-8e10-4922-9ff4-acc33e77d1d9/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-21 22:06:22,075 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c494986-8e10-4922-9ff4-acc33e77d1d9/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 22:06:22,075 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting fibonacciErr5ASSERT_VIOLATIONINTEGER_OVERFLOW === [fibonacciErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2023-11-21 22:06:22,075 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:06:22,075 INFO L85 PathProgramCache]: Analyzing trace with hash -1135152301, now seen corresponding path program 1 times [2023-11-21 22:06:22,076 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 22:06:22,076 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [853124118] [2023-11-21 22:06:22,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:06:22,076 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 22:06:22,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:06:22,131 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2023-11-21 22:06:22,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:06:22,147 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2023-11-21 22:06:22,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:06:22,164 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-11-21 22:06:22,164 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 22:06:22,164 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [853124118] [2023-11-21 22:06:22,165 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [853124118] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-21 22:06:22,165 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1435491161] [2023-11-21 22:06:22,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:06:22,165 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 22:06:22,166 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c494986-8e10-4922-9ff4-acc33e77d1d9/bin/uautomizer-verify-bycVGegfSx/z3 [2023-11-21 22:06:22,167 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c494986-8e10-4922-9ff4-acc33e77d1d9/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-21 22:06:22,187 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c494986-8e10-4922-9ff4-acc33e77d1d9/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-21 22:06:22,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:06:22,213 INFO L262 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-21 22:06:22,215 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 22:06:22,275 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-11-21 22:06:22,276 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-21 22:06:22,276 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1435491161] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 22:06:22,276 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-21 22:06:22,276 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 9 [2023-11-21 22:06:22,277 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1672016787] [2023-11-21 22:06:22,277 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 22:06:22,277 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-21 22:06:22,278 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 22:06:22,278 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-21 22:06:22,278 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2023-11-21 22:06:22,279 INFO L87 Difference]: Start difference. First operand 53 states and 68 transitions. Second operand has 6 states, 5 states have (on average 3.2) internal successors, (16), 6 states have internal predecessors, (16), 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) [2023-11-21 22:06:22,317 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 22:06:22,318 INFO L93 Difference]: Finished difference Result 82 states and 115 transitions. [2023-11-21 22:06:22,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-21 22:06:22,318 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 3.2) internal successors, (16), 6 states have internal predecessors, (16), 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 30 [2023-11-21 22:06:22,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 22:06:22,321 INFO L225 Difference]: With dead ends: 82 [2023-11-21 22:06:22,321 INFO L226 Difference]: Without dead ends: 81 [2023-11-21 22:06:22,322 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2023-11-21 22:06:22,323 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 4 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-21 22:06:22,323 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 47 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-21 22:06:22,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2023-11-21 22:06:22,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 62. [2023-11-21 22:06:22,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 46 states have (on average 1.0869565217391304) internal successors, (50), 48 states have internal predecessors, (50), 8 states have call successors, (8), 2 states have call predecessors, (8), 6 states have return successors, (27), 11 states have call predecessors, (27), 7 states have call successors, (27) [2023-11-21 22:06:22,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 85 transitions. [2023-11-21 22:06:22,342 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 85 transitions. Word has length 30 [2023-11-21 22:06:22,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 22:06:22,342 INFO L495 AbstractCegarLoop]: Abstraction has 62 states and 85 transitions. [2023-11-21 22:06:22,343 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 3.2) internal successors, (16), 6 states have internal predecessors, (16), 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) [2023-11-21 22:06:22,343 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 85 transitions. [2023-11-21 22:06:22,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2023-11-21 22:06:22,345 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 22:06:22,345 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1] [2023-11-21 22:06:22,363 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c494986-8e10-4922-9ff4-acc33e77d1d9/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-21 22:06:22,557 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c494986-8e10-4922-9ff4-acc33e77d1d9/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 22:06:22,558 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting fibonacciErr5ASSERT_VIOLATIONINTEGER_OVERFLOW === [fibonacciErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2023-11-21 22:06:22,558 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:06:22,558 INFO L85 PathProgramCache]: Analyzing trace with hash 353528193, now seen corresponding path program 1 times [2023-11-21 22:06:22,559 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 22:06:22,559 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1394621834] [2023-11-21 22:06:22,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:06:22,559 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 22:06:22,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:06:22,765 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-11-21 22:06:22,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:06:22,822 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-11-21 22:06:22,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:06:22,834 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2023-11-21 22:06:22,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:06:22,848 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2023-11-21 22:06:22,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:06:22,867 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2023-11-21 22:06:22,867 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 22:06:22,868 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1394621834] [2023-11-21 22:06:22,868 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1394621834] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-21 22:06:22,868 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [557002738] [2023-11-21 22:06:22,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:06:22,868 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 22:06:22,869 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c494986-8e10-4922-9ff4-acc33e77d1d9/bin/uautomizer-verify-bycVGegfSx/z3 [2023-11-21 22:06:22,870 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c494986-8e10-4922-9ff4-acc33e77d1d9/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-21 22:06:22,890 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c494986-8e10-4922-9ff4-acc33e77d1d9/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-21 22:06:22,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:06:22,938 INFO L262 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-21 22:06:22,942 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 22:06:23,020 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2023-11-21 22:06:23,021 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-21 22:06:23,251 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2023-11-21 22:06:23,251 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [557002738] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-21 22:06:23,251 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-21 22:06:23,252 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 7] total 13 [2023-11-21 22:06:23,252 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [930373281] [2023-11-21 22:06:23,252 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-21 22:06:23,253 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-21 22:06:23,253 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 22:06:23,254 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-21 22:06:23,254 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=133, Unknown=0, NotChecked=0, Total=182 [2023-11-21 22:06:23,255 INFO L87 Difference]: Start difference. First operand 62 states and 85 transitions. Second operand has 14 states, 13 states have (on average 2.923076923076923) internal successors, (38), 14 states have internal predecessors, (38), 3 states have call successors, (4), 1 states have call predecessors, (4), 4 states have return successors, (8), 8 states have call predecessors, (8), 3 states have call successors, (8) [2023-11-21 22:06:23,431 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 22:06:23,431 INFO L93 Difference]: Finished difference Result 130 states and 195 transitions. [2023-11-21 22:06:23,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-11-21 22:06:23,433 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 2.923076923076923) internal successors, (38), 14 states have internal predecessors, (38), 3 states have call successors, (4), 1 states have call predecessors, (4), 4 states have return successors, (8), 8 states have call predecessors, (8), 3 states have call successors, (8) Word has length 44 [2023-11-21 22:06:23,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 22:06:23,445 INFO L225 Difference]: With dead ends: 130 [2023-11-21 22:06:23,445 INFO L226 Difference]: Without dead ends: 129 [2023-11-21 22:06:23,448 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 89 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=109, Invalid=271, Unknown=0, NotChecked=0, Total=380 [2023-11-21 22:06:23,450 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 13 mSDsluCounter, 80 mSDsCounter, 0 mSdLazyCounter, 96 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 98 SdHoareTripleChecker+Invalid, 106 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 96 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-21 22:06:23,452 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 98 Invalid, 106 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 96 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-21 22:06:23,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2023-11-21 22:06:23,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 96. [2023-11-21 22:06:23,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 74 states have (on average 1.0810810810810811) internal successors, (80), 73 states have internal predecessors, (80), 11 states have call successors, (11), 2 states have call predecessors, (11), 9 states have return successors, (66), 20 states have call predecessors, (66), 10 states have call successors, (66) [2023-11-21 22:06:23,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 157 transitions. [2023-11-21 22:06:23,491 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 157 transitions. Word has length 44 [2023-11-21 22:06:23,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 22:06:23,492 INFO L495 AbstractCegarLoop]: Abstraction has 96 states and 157 transitions. [2023-11-21 22:06:23,493 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 2.923076923076923) internal successors, (38), 14 states have internal predecessors, (38), 3 states have call successors, (4), 1 states have call predecessors, (4), 4 states have return successors, (8), 8 states have call predecessors, (8), 3 states have call successors, (8) [2023-11-21 22:06:23,494 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 157 transitions. [2023-11-21 22:06:23,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2023-11-21 22:06:23,511 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 22:06:23,511 INFO L195 NwaCegarLoop]: trace histogram [11, 9, 7, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 3, 3, 2, 1, 1, 1] [2023-11-21 22:06:23,536 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c494986-8e10-4922-9ff4-acc33e77d1d9/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-21 22:06:23,732 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c494986-8e10-4922-9ff4-acc33e77d1d9/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 22:06:23,732 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting fibonacciErr4ASSERT_VIOLATIONINTEGER_OVERFLOW === [fibonacciErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2023-11-21 22:06:23,733 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:06:23,733 INFO L85 PathProgramCache]: Analyzing trace with hash 363502739, now seen corresponding path program 1 times [2023-11-21 22:06:23,733 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 22:06:23,733 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1476947747] [2023-11-21 22:06:23,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:06:23,733 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 22:06:23,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:06:23,847 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-11-21 22:06:23,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:06:23,915 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-11-21 22:06:23,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:06:23,927 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2023-11-21 22:06:23,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:06:23,932 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2023-11-21 22:06:23,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:06:23,940 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-11-21 22:06:23,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:06:23,943 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2023-11-21 22:06:23,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:06:23,945 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2023-11-21 22:06:23,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:06:23,953 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-11-21 22:06:23,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:06:23,956 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2023-11-21 22:06:23,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:06:23,959 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 40 proven. 109 refuted. 0 times theorem prover too weak. 139 trivial. 0 not checked. [2023-11-21 22:06:23,959 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 22:06:23,960 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1476947747] [2023-11-21 22:06:23,960 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1476947747] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-21 22:06:23,960 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1727493929] [2023-11-21 22:06:23,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:06:23,960 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 22:06:23,961 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c494986-8e10-4922-9ff4-acc33e77d1d9/bin/uautomizer-verify-bycVGegfSx/z3 [2023-11-21 22:06:23,962 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c494986-8e10-4922-9ff4-acc33e77d1d9/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-21 22:06:23,983 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c494986-8e10-4922-9ff4-acc33e77d1d9/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-21 22:06:24,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:06:24,056 INFO L262 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-21 22:06:24,061 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 22:06:24,187 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 167 proven. 67 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2023-11-21 22:06:24,188 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-21 22:06:24,476 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 49 proven. 137 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2023-11-21 22:06:24,477 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1727493929] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-21 22:06:24,477 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-21 22:06:24,477 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 10] total 15 [2023-11-21 22:06:24,477 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1765816493] [2023-11-21 22:06:24,477 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-21 22:06:24,478 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-11-21 22:06:24,479 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 22:06:24,479 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-11-21 22:06:24,480 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2023-11-21 22:06:24,480 INFO L87 Difference]: Start difference. First operand 96 states and 157 transitions. Second operand has 15 states, 15 states have (on average 5.6) internal successors, (84), 15 states have internal predecessors, (84), 10 states have call successors, (16), 3 states have call predecessors, (16), 5 states have return successors, (15), 6 states have call predecessors, (15), 9 states have call successors, (15) [2023-11-21 22:06:24,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 22:06:24,634 INFO L93 Difference]: Finished difference Result 220 states and 397 transitions. [2023-11-21 22:06:24,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-21 22:06:24,635 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 5.6) internal successors, (84), 15 states have internal predecessors, (84), 10 states have call successors, (16), 3 states have call predecessors, (16), 5 states have return successors, (15), 6 states have call predecessors, (15), 9 states have call successors, (15) Word has length 95 [2023-11-21 22:06:24,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 22:06:24,638 INFO L225 Difference]: With dead ends: 220 [2023-11-21 22:06:24,638 INFO L226 Difference]: Without dead ends: 126 [2023-11-21 22:06:24,640 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 223 GetRequests, 199 SyntacticMatches, 6 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=117, Invalid=263, Unknown=0, NotChecked=0, Total=380 [2023-11-21 22:06:24,641 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 95 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 80 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 95 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 121 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 80 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-21 22:06:24,641 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [95 Valid, 46 Invalid, 121 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 80 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-21 22:06:24,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2023-11-21 22:06:24,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 108. [2023-11-21 22:06:24,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 84 states have (on average 1.0833333333333333) internal successors, (91), 82 states have internal predecessors, (91), 12 states have call successors, (12), 3 states have call predecessors, (12), 10 states have return successors, (75), 22 states have call predecessors, (75), 11 states have call successors, (75) [2023-11-21 22:06:24,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 178 transitions. [2023-11-21 22:06:24,667 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 178 transitions. Word has length 95 [2023-11-21 22:06:24,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 22:06:24,667 INFO L495 AbstractCegarLoop]: Abstraction has 108 states and 178 transitions. [2023-11-21 22:06:24,668 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 5.6) internal successors, (84), 15 states have internal predecessors, (84), 10 states have call successors, (16), 3 states have call predecessors, (16), 5 states have return successors, (15), 6 states have call predecessors, (15), 9 states have call successors, (15) [2023-11-21 22:06:24,668 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 178 transitions. [2023-11-21 22:06:24,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 177 [2023-11-21 22:06:24,673 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 22:06:24,673 INFO L195 NwaCegarLoop]: trace histogram [20, 17, 11, 10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 8, 8, 7, 7, 1, 1, 1, 1] [2023-11-21 22:06:24,695 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c494986-8e10-4922-9ff4-acc33e77d1d9/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-21 22:06:24,886 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c494986-8e10-4922-9ff4-acc33e77d1d9/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 22:06:24,887 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting fibonacciErr4ASSERT_VIOLATIONINTEGER_OVERFLOW === [fibonacciErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2023-11-21 22:06:24,887 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:06:24,887 INFO L85 PathProgramCache]: Analyzing trace with hash 1114054424, now seen corresponding path program 2 times [2023-11-21 22:06:24,887 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 22:06:24,887 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [95708585] [2023-11-21 22:06:24,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:06:24,887 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 22:06:24,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:06:25,039 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2023-11-21 22:06:25,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:06:25,066 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-11-21 22:06:25,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:06:25,096 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-11-21 22:06:25,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:06:25,112 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2023-11-21 22:06:25,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:06:25,115 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2023-11-21 22:06:25,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:06:25,118 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2023-11-21 22:06:25,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:06:25,129 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-11-21 22:06:25,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:06:25,135 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-11-21 22:06:25,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:06:25,138 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2023-11-21 22:06:25,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:06:25,140 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2023-11-21 22:06:25,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:06:25,143 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2023-11-21 22:06:25,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:06:25,159 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-11-21 22:06:25,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:06:25,172 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-11-21 22:06:25,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:06:25,183 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-11-21 22:06:25,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:06:25,187 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2023-11-21 22:06:25,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:06:25,190 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2023-11-21 22:06:25,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:06:25,194 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2023-11-21 22:06:25,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:06:25,198 INFO L134 CoverageAnalysis]: Checked inductivity of 1063 backedges. 74 proven. 260 refuted. 0 times theorem prover too weak. 729 trivial. 0 not checked. [2023-11-21 22:06:25,199 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 22:06:25,199 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [95708585] [2023-11-21 22:06:25,199 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [95708585] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-21 22:06:25,199 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [55236321] [2023-11-21 22:06:25,201 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-21 22:06:25,201 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 22:06:25,202 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c494986-8e10-4922-9ff4-acc33e77d1d9/bin/uautomizer-verify-bycVGegfSx/z3 [2023-11-21 22:06:25,203 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c494986-8e10-4922-9ff4-acc33e77d1d9/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-21 22:06:25,226 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c494986-8e10-4922-9ff4-acc33e77d1d9/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-21 22:06:25,307 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-21 22:06:25,307 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-21 22:06:25,309 INFO L262 TraceCheckSpWp]: Trace formula consists of 347 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-21 22:06:25,336 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 22:06:25,490 INFO L134 CoverageAnalysis]: Checked inductivity of 1063 backedges. 615 proven. 167 refuted. 0 times theorem prover too weak. 281 trivial. 0 not checked. [2023-11-21 22:06:25,490 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-21 22:06:26,004 INFO L134 CoverageAnalysis]: Checked inductivity of 1063 backedges. 112 proven. 411 refuted. 0 times theorem prover too weak. 540 trivial. 0 not checked. [2023-11-21 22:06:26,004 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [55236321] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-21 22:06:26,004 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-21 22:06:26,005 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 10, 12] total 17 [2023-11-21 22:06:26,005 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [965410647] [2023-11-21 22:06:26,005 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-21 22:06:26,007 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-11-21 22:06:26,007 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 22:06:26,009 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-11-21 22:06:26,009 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=216, Unknown=0, NotChecked=0, Total=272 [2023-11-21 22:06:26,010 INFO L87 Difference]: Start difference. First operand 108 states and 178 transitions. Second operand has 17 states, 17 states have (on average 5.352941176470588) internal successors, (91), 17 states have internal predecessors, (91), 11 states have call successors, (17), 3 states have call predecessors, (17), 6 states have return successors, (18), 6 states have call predecessors, (18), 10 states have call successors, (18) [2023-11-21 22:06:26,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 22:06:26,228 INFO L93 Difference]: Finished difference Result 201 states and 347 transitions. [2023-11-21 22:06:26,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-11-21 22:06:26,228 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 5.352941176470588) internal successors, (91), 17 states have internal predecessors, (91), 11 states have call successors, (17), 3 states have call predecessors, (17), 6 states have return successors, (18), 6 states have call predecessors, (18), 10 states have call successors, (18) Word has length 176 [2023-11-21 22:06:26,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 22:06:26,233 INFO L225 Difference]: With dead ends: 201 [2023-11-21 22:06:26,233 INFO L226 Difference]: Without dead ends: 95 [2023-11-21 22:06:26,235 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 402 GetRequests, 373 SyntacticMatches, 7 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=157, Invalid=395, Unknown=0, NotChecked=0, Total=552 [2023-11-21 22:06:26,238 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 163 mSDsluCounter, 41 mSDsCounter, 0 mSdLazyCounter, 131 mSolverCounterSat, 70 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 163 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 201 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 70 IncrementalHoareTripleChecker+Valid, 131 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-21 22:06:26,238 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [163 Valid, 54 Invalid, 201 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [70 Valid, 131 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-21 22:06:26,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2023-11-21 22:06:26,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 77. [2023-11-21 22:06:26,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 60 states have (on average 1.1166666666666667) internal successors, (67), 58 states have internal predecessors, (67), 8 states have call successors, (8), 4 states have call predecessors, (8), 7 states have return successors, (27), 14 states have call predecessors, (27), 7 states have call successors, (27) [2023-11-21 22:06:26,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 102 transitions. [2023-11-21 22:06:26,277 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 102 transitions. Word has length 176 [2023-11-21 22:06:26,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 22:06:26,278 INFO L495 AbstractCegarLoop]: Abstraction has 77 states and 102 transitions. [2023-11-21 22:06:26,279 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 5.352941176470588) internal successors, (91), 17 states have internal predecessors, (91), 11 states have call successors, (17), 3 states have call predecessors, (17), 6 states have return successors, (18), 6 states have call predecessors, (18), 10 states have call successors, (18) [2023-11-21 22:06:26,280 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 102 transitions. [2023-11-21 22:06:26,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2023-11-21 22:06:26,288 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 22:06:26,288 INFO L195 NwaCegarLoop]: trace histogram [18, 15, 15, 9, 9, 9, 9, 8, 8, 8, 8, 8, 7, 7, 6, 6, 6, 3, 1, 1, 1] [2023-11-21 22:06:26,314 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c494986-8e10-4922-9ff4-acc33e77d1d9/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-21 22:06:26,503 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c494986-8e10-4922-9ff4-acc33e77d1d9/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 22:06:26,503 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting fibonacciErr4ASSERT_VIOLATIONINTEGER_OVERFLOW === [fibonacciErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2023-11-21 22:06:26,503 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:06:26,504 INFO L85 PathProgramCache]: Analyzing trace with hash 1734853709, now seen corresponding path program 3 times [2023-11-21 22:06:26,504 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 22:06:26,504 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [96132080] [2023-11-21 22:06:26,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:06:26,504 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 22:06:26,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:06:26,707 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2023-11-21 22:06:26,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:06:26,771 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-11-21 22:06:26,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:06:26,812 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-11-21 22:06:26,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:06:26,828 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2023-11-21 22:06:26,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:06:26,833 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2023-11-21 22:06:26,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:06:26,838 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2023-11-21 22:06:26,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:06:26,906 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-11-21 22:06:26,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:06:26,929 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-11-21 22:06:26,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:06:26,932 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2023-11-21 22:06:26,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:06:26,935 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2023-11-21 22:06:26,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:06:26,943 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 115 [2023-11-21 22:06:26,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:06:26,955 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-11-21 22:06:26,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:06:26,961 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-11-21 22:06:26,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:06:26,965 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2023-11-21 22:06:26,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:06:26,978 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2023-11-21 22:06:26,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:06:26,982 INFO L134 CoverageAnalysis]: Checked inductivity of 898 backedges. 123 proven. 343 refuted. 0 times theorem prover too weak. 432 trivial. 0 not checked. [2023-11-21 22:06:26,983 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 22:06:26,983 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [96132080] [2023-11-21 22:06:26,984 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [96132080] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-21 22:06:26,984 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1925570863] [2023-11-21 22:06:26,984 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-21 22:06:26,984 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 22:06:26,984 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c494986-8e10-4922-9ff4-acc33e77d1d9/bin/uautomizer-verify-bycVGegfSx/z3 [2023-11-21 22:06:26,985 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c494986-8e10-4922-9ff4-acc33e77d1d9/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-21 22:06:27,011 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c494986-8e10-4922-9ff4-acc33e77d1d9/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-21 22:06:27,059 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2023-11-21 22:06:27,059 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-21 22:06:27,060 INFO L262 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-21 22:06:27,065 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 22:06:27,234 INFO L134 CoverageAnalysis]: Checked inductivity of 898 backedges. 210 proven. 6 refuted. 0 times theorem prover too weak. 682 trivial. 0 not checked. [2023-11-21 22:06:27,235 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-21 22:06:27,768 INFO L134 CoverageAnalysis]: Checked inductivity of 898 backedges. 210 proven. 6 refuted. 0 times theorem prover too weak. 682 trivial. 0 not checked. [2023-11-21 22:06:27,768 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1925570863] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-21 22:06:27,768 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-21 22:06:27,768 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 9, 9] total 25 [2023-11-21 22:06:27,769 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1342647113] [2023-11-21 22:06:27,769 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-21 22:06:27,770 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-11-21 22:06:27,770 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 22:06:27,774 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-11-21 22:06:27,775 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=512, Unknown=0, NotChecked=0, Total=600 [2023-11-21 22:06:27,775 INFO L87 Difference]: Start difference. First operand 77 states and 102 transitions. Second operand has 25 states, 25 states have (on average 3.6) internal successors, (90), 25 states have internal predecessors, (90), 11 states have call successors, (14), 2 states have call predecessors, (14), 8 states have return successors, (18), 16 states have call predecessors, (18), 10 states have call successors, (18) [2023-11-21 22:06:28,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 22:06:28,319 INFO L93 Difference]: Finished difference Result 192 states and 272 transitions. [2023-11-21 22:06:28,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2023-11-21 22:06:28,320 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 3.6) internal successors, (90), 25 states have internal predecessors, (90), 11 states have call successors, (14), 2 states have call predecessors, (14), 8 states have return successors, (18), 16 states have call predecessors, (18), 10 states have call successors, (18) Word has length 162 [2023-11-21 22:06:28,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 22:06:28,322 INFO L225 Difference]: With dead ends: 192 [2023-11-21 22:06:28,322 INFO L226 Difference]: Without dead ends: 117 [2023-11-21 22:06:28,324 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 391 GetRequests, 339 SyntacticMatches, 7 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 632 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=417, Invalid=1745, Unknown=0, NotChecked=0, Total=2162 [2023-11-21 22:06:28,325 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 103 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 379 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 103 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 417 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 379 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-21 22:06:28,326 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [103 Valid, 49 Invalid, 417 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 379 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-21 22:06:28,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2023-11-21 22:06:28,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 97. [2023-11-21 22:06:28,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 77 states have (on average 1.103896103896104) internal successors, (85), 74 states have internal predecessors, (85), 10 states have call successors, (10), 6 states have call predecessors, (10), 9 states have return successors, (31), 16 states have call predecessors, (31), 9 states have call successors, (31) [2023-11-21 22:06:28,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 126 transitions. [2023-11-21 22:06:28,338 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 126 transitions. Word has length 162 [2023-11-21 22:06:28,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 22:06:28,339 INFO L495 AbstractCegarLoop]: Abstraction has 97 states and 126 transitions. [2023-11-21 22:06:28,339 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 3.6) internal successors, (90), 25 states have internal predecessors, (90), 11 states have call successors, (14), 2 states have call predecessors, (14), 8 states have return successors, (18), 16 states have call predecessors, (18), 10 states have call successors, (18) [2023-11-21 22:06:28,340 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 126 transitions. [2023-11-21 22:06:28,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2023-11-21 22:06:28,341 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 22:06:28,342 INFO L195 NwaCegarLoop]: trace histogram [10, 8, 8, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 2, 1, 1, 1] [2023-11-21 22:06:28,370 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c494986-8e10-4922-9ff4-acc33e77d1d9/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-11-21 22:06:28,554 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c494986-8e10-4922-9ff4-acc33e77d1d9/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-11-21 22:06:28,555 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting fibonacciErr5ASSERT_VIOLATIONINTEGER_OVERFLOW === [fibonacciErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2023-11-21 22:06:28,555 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:06:28,555 INFO L85 PathProgramCache]: Analyzing trace with hash -846609970, now seen corresponding path program 2 times [2023-11-21 22:06:28,555 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 22:06:28,556 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [800894932] [2023-11-21 22:06:28,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:06:28,556 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 22:06:28,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:06:28,620 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2023-11-21 22:06:28,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:06:28,633 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-11-21 22:06:28,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:06:28,643 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-11-21 22:06:28,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:06:28,649 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-11-21 22:06:28,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:06:28,652 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2023-11-21 22:06:28,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:06:28,655 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2023-11-21 22:06:28,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:06:28,657 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2023-11-21 22:06:28,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:06:28,660 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2023-11-21 22:06:28,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:06:28,674 INFO L134 CoverageAnalysis]: Checked inductivity of 246 backedges. 32 proven. 0 refuted. 0 times theorem prover too weak. 214 trivial. 0 not checked. [2023-11-21 22:06:28,674 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 22:06:28,674 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [800894932] [2023-11-21 22:06:28,675 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [800894932] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 22:06:28,675 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 22:06:28,675 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-21 22:06:28,675 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1889616670] [2023-11-21 22:06:28,675 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 22:06:28,676 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-21 22:06:28,676 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 22:06:28,676 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-21 22:06:28,677 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-21 22:06:28,677 INFO L87 Difference]: Start difference. First operand 97 states and 126 transitions. Second operand has 5 states, 4 states have (on average 5.75) internal successors, (23), 5 states have internal predecessors, (23), 2 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-11-21 22:06:28,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 22:06:28,711 INFO L93 Difference]: Finished difference Result 98 states and 126 transitions. [2023-11-21 22:06:28,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-21 22:06:28,711 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 5.75) internal successors, (23), 5 states have internal predecessors, (23), 2 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 89 [2023-11-21 22:06:28,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 22:06:28,713 INFO L225 Difference]: With dead ends: 98 [2023-11-21 22:06:28,713 INFO L226 Difference]: Without dead ends: 97 [2023-11-21 22:06:28,714 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-21 22:06:28,714 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 3 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-21 22:06:28,715 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 44 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-21 22:06:28,715 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2023-11-21 22:06:28,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 97. [2023-11-21 22:06:28,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 77 states have (on average 1.0909090909090908) internal successors, (84), 74 states have internal predecessors, (84), 10 states have call successors, (10), 6 states have call predecessors, (10), 9 states have return successors, (31), 16 states have call predecessors, (31), 9 states have call successors, (31) [2023-11-21 22:06:28,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 125 transitions. [2023-11-21 22:06:28,726 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 125 transitions. Word has length 89 [2023-11-21 22:06:28,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 22:06:28,726 INFO L495 AbstractCegarLoop]: Abstraction has 97 states and 125 transitions. [2023-11-21 22:06:28,727 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 5.75) internal successors, (23), 5 states have internal predecessors, (23), 2 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-11-21 22:06:28,727 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 125 transitions. [2023-11-21 22:06:28,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2023-11-21 22:06:28,728 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 22:06:28,728 INFO L195 NwaCegarLoop]: trace histogram [9, 8, 8, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1] [2023-11-21 22:06:28,728 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-11-21 22:06:28,729 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting fibonacciErr5ASSERT_VIOLATIONINTEGER_OVERFLOW === [fibonacciErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2023-11-21 22:06:28,729 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:06:28,729 INFO L85 PathProgramCache]: Analyzing trace with hash 1550943975, now seen corresponding path program 3 times [2023-11-21 22:06:28,729 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 22:06:28,730 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1534295262] [2023-11-21 22:06:28,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:06:28,730 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 22:06:28,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:06:28,801 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-11-21 22:06:28,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:06:28,880 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-11-21 22:06:28,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:06:28,942 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-11-21 22:06:28,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:06:28,953 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-11-21 22:06:28,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:06:28,955 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2023-11-21 22:06:28,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:06:28,958 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2023-11-21 22:06:28,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:06:28,963 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2023-11-21 22:06:28,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:06:28,968 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2023-11-21 22:06:28,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:06:28,986 INFO L134 CoverageAnalysis]: Checked inductivity of 216 backedges. 89 proven. 39 refuted. 0 times theorem prover too weak. 88 trivial. 0 not checked. [2023-11-21 22:06:28,987 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 22:06:28,987 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1534295262] [2023-11-21 22:06:28,987 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1534295262] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-21 22:06:28,987 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1306469504] [2023-11-21 22:06:28,987 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-21 22:06:28,988 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 22:06:28,988 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c494986-8e10-4922-9ff4-acc33e77d1d9/bin/uautomizer-verify-bycVGegfSx/z3 [2023-11-21 22:06:28,989 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c494986-8e10-4922-9ff4-acc33e77d1d9/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-21 22:06:29,018 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c494986-8e10-4922-9ff4-acc33e77d1d9/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-21 22:06:29,069 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2023-11-21 22:06:29,069 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-21 22:06:29,071 INFO L262 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-21 22:06:29,073 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 22:06:29,142 INFO L134 CoverageAnalysis]: Checked inductivity of 216 backedges. 130 proven. 20 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2023-11-21 22:06:29,142 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-21 22:06:29,434 INFO L134 CoverageAnalysis]: Checked inductivity of 216 backedges. 95 proven. 36 refuted. 0 times theorem prover too weak. 85 trivial. 0 not checked. [2023-11-21 22:06:29,434 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1306469504] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-21 22:06:29,434 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-21 22:06:29,434 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 9] total 16 [2023-11-21 22:06:29,435 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [863462343] [2023-11-21 22:06:29,435 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-21 22:06:29,435 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-11-21 22:06:29,436 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 22:06:29,436 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-11-21 22:06:29,437 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=167, Unknown=0, NotChecked=0, Total=240 [2023-11-21 22:06:29,437 INFO L87 Difference]: Start difference. First operand 97 states and 125 transitions. Second operand has 16 states, 16 states have (on average 5.0625) internal successors, (81), 16 states have internal predecessors, (81), 8 states have call successors, (14), 2 states have call predecessors, (14), 6 states have return successors, (15), 9 states have call predecessors, (15), 8 states have call successors, (15) [2023-11-21 22:06:29,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 22:06:29,558 INFO L93 Difference]: Finished difference Result 160 states and 218 transitions. [2023-11-21 22:06:29,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-21 22:06:29,558 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 5.0625) internal successors, (81), 16 states have internal predecessors, (81), 8 states have call successors, (14), 2 states have call predecessors, (14), 6 states have return successors, (15), 9 states have call predecessors, (15), 8 states have call successors, (15) Word has length 84 [2023-11-21 22:06:29,559 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 22:06:29,560 INFO L225 Difference]: With dead ends: 160 [2023-11-21 22:06:29,560 INFO L226 Difference]: Without dead ends: 65 [2023-11-21 22:06:29,561 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 195 GetRequests, 174 SyntacticMatches, 4 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=109, Invalid=233, Unknown=0, NotChecked=0, Total=342 [2023-11-21 22:06:29,562 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 30 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 137 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 150 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 137 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-21 22:06:29,562 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [32 Valid, 66 Invalid, 150 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 137 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-21 22:06:29,563 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2023-11-21 22:06:29,568 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 63. [2023-11-21 22:06:29,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 50 states have (on average 1.06) internal successors, (53), 48 states have internal predecessors, (53), 7 states have call successors, (7), 6 states have call predecessors, (7), 5 states have return successors, (11), 8 states have call predecessors, (11), 6 states have call successors, (11) [2023-11-21 22:06:29,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 71 transitions. [2023-11-21 22:06:29,569 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 71 transitions. Word has length 84 [2023-11-21 22:06:29,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 22:06:29,570 INFO L495 AbstractCegarLoop]: Abstraction has 63 states and 71 transitions. [2023-11-21 22:06:29,570 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 5.0625) internal successors, (81), 16 states have internal predecessors, (81), 8 states have call successors, (14), 2 states have call predecessors, (14), 6 states have return successors, (15), 9 states have call predecessors, (15), 8 states have call successors, (15) [2023-11-21 22:06:29,570 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 71 transitions. [2023-11-21 22:06:29,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2023-11-21 22:06:29,572 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 22:06:29,572 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] [2023-11-21 22:06:29,595 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c494986-8e10-4922-9ff4-acc33e77d1d9/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-11-21 22:06:29,786 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c494986-8e10-4922-9ff4-acc33e77d1d9/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-11-21 22:06:29,786 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting fibonacciErr5ASSERT_VIOLATIONINTEGER_OVERFLOW === [fibonacciErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2023-11-21 22:06:29,787 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:06:29,787 INFO L85 PathProgramCache]: Analyzing trace with hash 136091064, now seen corresponding path program 4 times [2023-11-21 22:06:29,787 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 22:06:29,787 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1706520945] [2023-11-21 22:06:29,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:06:29,787 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 22:06:29,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:06:30,130 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-11-21 22:06:30,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:06:30,256 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-11-21 22:06:30,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:06:30,318 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-11-21 22:06:30,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:06:30,358 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-11-21 22:06:30,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:06:30,365 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2023-11-21 22:06:30,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:06:30,380 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2023-11-21 22:06:30,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:06:30,389 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2023-11-21 22:06:30,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:06:30,420 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-11-21 22:06:30,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:06:30,439 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2023-11-21 22:06:30,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:06:30,448 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 94 [2023-11-21 22:06:30,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:06:30,539 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-11-21 22:06:30,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:06:30,568 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-11-21 22:06:30,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:06:30,576 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2023-11-21 22:06:30,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:06:30,584 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2023-11-21 22:06:30,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:06:30,593 INFO L134 CoverageAnalysis]: Checked inductivity of 668 backedges. 78 proven. 135 refuted. 0 times theorem prover too weak. 455 trivial. 0 not checked. [2023-11-21 22:06:30,594 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 22:06:30,594 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1706520945] [2023-11-21 22:06:30,594 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1706520945] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-21 22:06:30,594 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1837032130] [2023-11-21 22:06:30,595 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-21 22:06:30,595 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 22:06:30,595 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c494986-8e10-4922-9ff4-acc33e77d1d9/bin/uautomizer-verify-bycVGegfSx/z3 [2023-11-21 22:06:30,596 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c494986-8e10-4922-9ff4-acc33e77d1d9/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-21 22:06:30,622 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c494986-8e10-4922-9ff4-acc33e77d1d9/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-21 22:06:30,702 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-21 22:06:30,702 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-21 22:06:30,704 INFO L262 TraceCheckSpWp]: Trace formula consists of 285 conjuncts, 29 conjunts are in the unsatisfiable core [2023-11-21 22:06:30,709 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 22:06:30,941 INFO L134 CoverageAnalysis]: Checked inductivity of 668 backedges. 78 proven. 135 refuted. 0 times theorem prover too weak. 455 trivial. 0 not checked. [2023-11-21 22:06:30,941 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-21 22:06:32,465 INFO L134 CoverageAnalysis]: Checked inductivity of 668 backedges. 144 proven. 128 refuted. 0 times theorem prover too weak. 396 trivial. 0 not checked. [2023-11-21 22:06:32,465 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1837032130] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-21 22:06:32,465 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-21 22:06:32,466 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 17] total 26 [2023-11-21 22:06:32,466 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1080501081] [2023-11-21 22:06:32,466 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-21 22:06:32,467 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-11-21 22:06:32,467 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 22:06:32,468 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-11-21 22:06:32,468 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=168, Invalid=534, Unknown=0, NotChecked=0, Total=702 [2023-11-21 22:06:32,469 INFO L87 Difference]: Start difference. First operand 63 states and 71 transitions. Second operand has 27 states, 26 states have (on average 2.6923076923076925) internal successors, (70), 27 states have internal predecessors, (70), 7 states have call successors, (8), 1 states have call predecessors, (8), 7 states have return successors, (18), 18 states have call predecessors, (18), 7 states have call successors, (18) [2023-11-21 22:06:32,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 22:06:32,710 INFO L93 Difference]: Finished difference Result 131 states and 179 transitions. [2023-11-21 22:06:32,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2023-11-21 22:06:32,711 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 26 states have (on average 2.6923076923076925) internal successors, (70), 27 states have internal predecessors, (70), 7 states have call successors, (8), 1 states have call predecessors, (8), 7 states have return successors, (18), 18 states have call predecessors, (18), 7 states have call successors, (18) Word has length 142 [2023-11-21 22:06:32,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 22:06:32,713 INFO L225 Difference]: With dead ends: 131 [2023-11-21 22:06:32,713 INFO L226 Difference]: Without dead ends: 130 [2023-11-21 22:06:32,714 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 347 GetRequests, 298 SyntacticMatches, 16 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 673 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=277, Invalid=913, Unknown=0, NotChecked=0, Total=1190 [2023-11-21 22:06:32,715 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 28 mSDsluCounter, 113 mSDsCounter, 0 mSdLazyCounter, 130 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 128 SdHoareTripleChecker+Invalid, 142 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 130 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-21 22:06:32,715 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [37 Valid, 128 Invalid, 142 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 130 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-21 22:06:32,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2023-11-21 22:06:32,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 99. [2023-11-21 22:06:32,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 78 states have (on average 1.0384615384615385) internal successors, (81), 76 states have internal predecessors, (81), 11 states have call successors, (11), 6 states have call predecessors, (11), 9 states have return successors, (47), 16 states have call predecessors, (47), 10 states have call successors, (47) [2023-11-21 22:06:32,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 139 transitions. [2023-11-21 22:06:32,728 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 139 transitions. Word has length 142 [2023-11-21 22:06:32,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 22:06:32,728 INFO L495 AbstractCegarLoop]: Abstraction has 99 states and 139 transitions. [2023-11-21 22:06:32,729 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 26 states have (on average 2.6923076923076925) internal successors, (70), 27 states have internal predecessors, (70), 7 states have call successors, (8), 1 states have call predecessors, (8), 7 states have return successors, (18), 18 states have call predecessors, (18), 7 states have call successors, (18) [2023-11-21 22:06:32,729 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 139 transitions. [2023-11-21 22:06:32,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 325 [2023-11-21 22:06:32,734 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 22:06:32,734 INFO L195 NwaCegarLoop]: trace histogram [34, 32, 27, 17, 17, 17, 17, 16, 16, 16, 16, 16, 16, 16, 16, 15, 10, 7, 1, 1, 1] [2023-11-21 22:06:32,760 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c494986-8e10-4922-9ff4-acc33e77d1d9/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-11-21 22:06:32,955 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c494986-8e10-4922-9ff4-acc33e77d1d9/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-11-21 22:06:32,955 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting fibonacciErr5ASSERT_VIOLATIONINTEGER_OVERFLOW === [fibonacciErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2023-11-21 22:06:32,956 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:06:32,956 INFO L85 PathProgramCache]: Analyzing trace with hash 1276789488, now seen corresponding path program 5 times [2023-11-21 22:06:32,956 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 22:06:32,956 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1527592380] [2023-11-21 22:06:32,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:06:32,956 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 22:06:32,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:06:33,290 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2023-11-21 22:06:33,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:06:33,373 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-11-21 22:06:33,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:06:33,435 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-11-21 22:06:33,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:06:33,474 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-11-21 22:06:33,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:06:33,489 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2023-11-21 22:06:33,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:06:33,494 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2023-11-21 22:06:33,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:06:33,499 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2023-11-21 22:06:33,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:06:33,510 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-11-21 22:06:33,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:06:33,512 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2023-11-21 22:06:33,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:06:33,514 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2023-11-21 22:06:33,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:06:33,691 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-11-21 22:06:33,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:06:33,786 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-11-21 22:06:33,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:06:33,868 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-11-21 22:06:33,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:06:33,877 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-11-21 22:06:33,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:06:33,880 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2023-11-21 22:06:33,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:06:33,882 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2023-11-21 22:06:33,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:06:33,887 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2023-11-21 22:06:33,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:06:33,900 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-11-21 22:06:33,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:06:33,903 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2023-11-21 22:06:33,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:06:33,906 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 92 [2023-11-21 22:06:33,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:06:33,952 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-11-21 22:06:33,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:06:33,967 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-11-21 22:06:33,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:06:33,977 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-11-21 22:06:33,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:06:33,982 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-11-21 22:06:33,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:06:33,985 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2023-11-21 22:06:33,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:06:33,987 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2023-11-21 22:06:33,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:06:33,990 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2023-11-21 22:06:33,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:06:33,997 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-11-21 22:06:33,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:06:33,999 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2023-11-21 22:06:34,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:06:34,002 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 92 [2023-11-21 22:06:34,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:06:34,006 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-11-21 22:06:34,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:06:34,013 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2023-11-21 22:06:34,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:06:34,019 INFO L134 CoverageAnalysis]: Checked inductivity of 3713 backedges. 375 proven. 1153 refuted. 0 times theorem prover too weak. 2185 trivial. 0 not checked. [2023-11-21 22:06:34,019 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 22:06:34,019 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1527592380] [2023-11-21 22:06:34,019 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1527592380] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-21 22:06:34,019 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [767189882] [2023-11-21 22:06:34,020 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-21 22:06:34,020 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 22:06:34,020 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c494986-8e10-4922-9ff4-acc33e77d1d9/bin/uautomizer-verify-bycVGegfSx/z3 [2023-11-21 22:06:34,023 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c494986-8e10-4922-9ff4-acc33e77d1d9/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-21 22:06:34,048 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c494986-8e10-4922-9ff4-acc33e77d1d9/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-21 22:06:34,155 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2023-11-21 22:06:34,156 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-21 22:06:34,157 INFO L262 TraceCheckSpWp]: Trace formula consists of 255 conjuncts, 15 conjunts are in the unsatisfiable core [2023-11-21 22:06:34,164 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 22:06:34,328 INFO L134 CoverageAnalysis]: Checked inductivity of 3713 backedges. 419 proven. 966 refuted. 0 times theorem prover too weak. 2328 trivial. 0 not checked. [2023-11-21 22:06:34,328 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-21 22:06:35,380 INFO L134 CoverageAnalysis]: Checked inductivity of 3713 backedges. 417 proven. 984 refuted. 0 times theorem prover too weak. 2312 trivial. 0 not checked. [2023-11-21 22:06:35,380 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [767189882] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-21 22:06:35,380 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-21 22:06:35,380 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 12, 16] total 28 [2023-11-21 22:06:35,381 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1515268567] [2023-11-21 22:06:35,381 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-21 22:06:35,382 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-11-21 22:06:35,382 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 22:06:35,383 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-11-21 22:06:35,384 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=194, Invalid=562, Unknown=0, NotChecked=0, Total=756 [2023-11-21 22:06:35,384 INFO L87 Difference]: Start difference. First operand 99 states and 139 transitions. Second operand has 28 states, 28 states have (on average 4.75) internal successors, (133), 28 states have internal predecessors, (133), 19 states have call successors, (25), 1 states have call predecessors, (25), 8 states have return successors, (31), 17 states have call predecessors, (31), 19 states have call successors, (31) [2023-11-21 22:06:35,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 22:06:35,700 INFO L93 Difference]: Finished difference Result 249 states and 395 transitions. [2023-11-21 22:06:35,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-11-21 22:06:35,701 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 4.75) internal successors, (133), 28 states have internal predecessors, (133), 19 states have call successors, (25), 1 states have call predecessors, (25), 8 states have return successors, (31), 17 states have call predecessors, (31), 19 states have call successors, (31) Word has length 324 [2023-11-21 22:06:35,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 22:06:35,706 INFO L225 Difference]: With dead ends: 249 [2023-11-21 22:06:35,707 INFO L226 Difference]: Without dead ends: 154 [2023-11-21 22:06:35,709 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 739 GetRequests, 696 SyntacticMatches, 7 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 486 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=397, Invalid=1009, Unknown=0, NotChecked=0, Total=1406 [2023-11-21 22:06:35,710 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 127 mSDsluCounter, 74 mSDsCounter, 0 mSdLazyCounter, 224 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 131 SdHoareTripleChecker+Valid, 101 SdHoareTripleChecker+Invalid, 285 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 224 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-21 22:06:35,711 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [131 Valid, 101 Invalid, 285 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 224 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-21 22:06:35,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2023-11-21 22:06:35,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 138. [2023-11-21 22:06:35,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 138 states, 110 states have (on average 1.0454545454545454) internal successors, (115), 106 states have internal predecessors, (115), 15 states have call successors, (15), 8 states have call predecessors, (15), 12 states have return successors, (57), 23 states have call predecessors, (57), 14 states have call successors, (57) [2023-11-21 22:06:35,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 187 transitions. [2023-11-21 22:06:35,734 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 187 transitions. Word has length 324 [2023-11-21 22:06:35,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 22:06:35,735 INFO L495 AbstractCegarLoop]: Abstraction has 138 states and 187 transitions. [2023-11-21 22:06:35,735 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 4.75) internal successors, (133), 28 states have internal predecessors, (133), 19 states have call successors, (25), 1 states have call predecessors, (25), 8 states have return successors, (31), 17 states have call predecessors, (31), 19 states have call successors, (31) [2023-11-21 22:06:35,735 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 187 transitions. [2023-11-21 22:06:35,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 345 [2023-11-21 22:06:35,742 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 22:06:35,743 INFO L195 NwaCegarLoop]: trace histogram [36, 34, 29, 18, 18, 18, 18, 17, 17, 17, 17, 17, 17, 17, 17, 16, 11, 7, 1, 1, 1] [2023-11-21 22:06:35,767 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c494986-8e10-4922-9ff4-acc33e77d1d9/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-11-21 22:06:35,956 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c494986-8e10-4922-9ff4-acc33e77d1d9/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-11-21 22:06:35,956 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting fibonacciErr5ASSERT_VIOLATIONINTEGER_OVERFLOW === [fibonacciErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2023-11-21 22:06:35,957 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:06:35,957 INFO L85 PathProgramCache]: Analyzing trace with hash -1829487273, now seen corresponding path program 6 times [2023-11-21 22:06:35,957 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 22:06:35,957 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1411659931] [2023-11-21 22:06:35,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:06:35,958 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 22:06:36,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:06:36,429 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2023-11-21 22:06:36,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:06:36,566 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-11-21 22:06:36,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:06:36,651 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-11-21 22:06:36,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:06:36,704 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-11-21 22:06:36,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:06:36,744 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-11-21 22:06:36,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:06:36,760 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2023-11-21 22:06:36,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:06:36,764 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2023-11-21 22:06:36,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:06:36,785 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2023-11-21 22:06:36,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:06:36,799 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-11-21 22:06:36,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:06:36,801 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2023-11-21 22:06:36,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:06:36,804 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 92 [2023-11-21 22:06:36,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:06:36,824 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-11-21 22:06:36,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:06:36,830 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-11-21 22:06:36,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:06:36,832 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2023-11-21 22:06:36,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:06:36,835 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2023-11-21 22:06:36,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:06:36,838 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 159 [2023-11-21 22:06:36,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:06:37,024 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-11-21 22:06:37,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:06:37,100 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-11-21 22:06:37,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:06:37,119 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-11-21 22:06:37,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:06:37,126 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-11-21 22:06:37,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:06:37,131 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-11-21 22:06:37,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:06:37,133 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2023-11-21 22:06:37,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:06:37,135 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2023-11-21 22:06:37,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:06:37,137 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2023-11-21 22:06:37,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:06:37,142 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-11-21 22:06:37,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:06:37,144 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2023-11-21 22:06:37,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:06:37,146 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 92 [2023-11-21 22:06:37,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:06:37,237 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-11-21 22:06:37,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:06:37,241 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2023-11-21 22:06:37,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:06:37,245 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 131 [2023-11-21 22:06:37,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:06:37,275 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-11-21 22:06:37,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:06:37,289 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-11-21 22:06:37,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:06:37,292 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2023-11-21 22:06:37,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:06:37,294 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2023-11-21 22:06:37,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:06:37,300 INFO L134 CoverageAnalysis]: Checked inductivity of 4199 backedges. 633 proven. 1187 refuted. 0 times theorem prover too weak. 2379 trivial. 0 not checked. [2023-11-21 22:06:37,300 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 22:06:37,300 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1411659931] [2023-11-21 22:06:37,300 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1411659931] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-21 22:06:37,301 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1352221206] [2023-11-21 22:06:37,301 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-21 22:06:37,301 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 22:06:37,301 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c494986-8e10-4922-9ff4-acc33e77d1d9/bin/uautomizer-verify-bycVGegfSx/z3 [2023-11-21 22:06:37,302 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c494986-8e10-4922-9ff4-acc33e77d1d9/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-21 22:06:37,326 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c494986-8e10-4922-9ff4-acc33e77d1d9/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-11-21 22:06:37,505 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 26 check-sat command(s) [2023-11-21 22:06:37,506 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-21 22:06:37,509 INFO L262 TraceCheckSpWp]: Trace formula consists of 638 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-21 22:06:37,515 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 22:06:37,646 INFO L134 CoverageAnalysis]: Checked inductivity of 4199 backedges. 2016 proven. 95 refuted. 0 times theorem prover too weak. 2088 trivial. 0 not checked. [2023-11-21 22:06:37,647 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-21 22:06:38,675 INFO L134 CoverageAnalysis]: Checked inductivity of 4199 backedges. 1078 proven. 293 refuted. 0 times theorem prover too weak. 2828 trivial. 0 not checked. [2023-11-21 22:06:38,675 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1352221206] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-21 22:06:38,675 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-21 22:06:38,676 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 10, 13] total 28 [2023-11-21 22:06:38,676 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1756521017] [2023-11-21 22:06:38,676 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-21 22:06:38,678 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-11-21 22:06:38,678 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 22:06:38,679 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-11-21 22:06:38,680 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=182, Invalid=574, Unknown=0, NotChecked=0, Total=756 [2023-11-21 22:06:38,680 INFO L87 Difference]: Start difference. First operand 138 states and 187 transitions. Second operand has 28 states, 28 states have (on average 5.071428571428571) internal successors, (142), 28 states have internal predecessors, (142), 18 states have call successors, (26), 2 states have call predecessors, (26), 11 states have return successors, (35), 20 states have call predecessors, (35), 18 states have call successors, (35) [2023-11-21 22:06:39,055 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 22:06:39,055 INFO L93 Difference]: Finished difference Result 275 states and 419 transitions. [2023-11-21 22:06:39,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2023-11-21 22:06:39,056 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 5.071428571428571) internal successors, (142), 28 states have internal predecessors, (142), 18 states have call successors, (26), 2 states have call predecessors, (26), 11 states have return successors, (35), 20 states have call predecessors, (35), 18 states have call successors, (35) Word has length 344 [2023-11-21 22:06:39,057 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 22:06:39,058 INFO L225 Difference]: With dead ends: 275 [2023-11-21 22:06:39,059 INFO L226 Difference]: Without dead ends: 141 [2023-11-21 22:06:39,063 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 789 GetRequests, 742 SyntacticMatches, 6 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 573 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=463, Invalid=1343, Unknown=0, NotChecked=0, Total=1806 [2023-11-21 22:06:39,064 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 179 mSDsluCounter, 85 mSDsCounter, 0 mSdLazyCounter, 283 mSolverCounterSat, 90 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 183 SdHoareTripleChecker+Valid, 110 SdHoareTripleChecker+Invalid, 373 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 90 IncrementalHoareTripleChecker+Valid, 283 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-21 22:06:39,064 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [183 Valid, 110 Invalid, 373 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [90 Valid, 283 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-21 22:06:39,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2023-11-21 22:06:39,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 123. [2023-11-21 22:06:39,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123 states, 99 states have (on average 1.0606060606060606) internal successors, (105), 95 states have internal predecessors, (105), 14 states have call successors, (14), 10 states have call predecessors, (14), 9 states have return successors, (30), 17 states have call predecessors, (30), 13 states have call successors, (30) [2023-11-21 22:06:39,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 149 transitions. [2023-11-21 22:06:39,078 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 149 transitions. Word has length 344 [2023-11-21 22:06:39,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 22:06:39,078 INFO L495 AbstractCegarLoop]: Abstraction has 123 states and 149 transitions. [2023-11-21 22:06:39,079 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 5.071428571428571) internal successors, (142), 28 states have internal predecessors, (142), 18 states have call successors, (26), 2 states have call predecessors, (26), 11 states have return successors, (35), 20 states have call predecessors, (35), 18 states have call successors, (35) [2023-11-21 22:06:39,079 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 149 transitions. [2023-11-21 22:06:39,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 306 [2023-11-21 22:06:39,085 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 22:06:39,085 INFO L195 NwaCegarLoop]: trace histogram [32, 30, 26, 16, 16, 16, 16, 15, 15, 15, 15, 15, 15, 15, 15, 14, 10, 6, 1, 1, 1] [2023-11-21 22:06:39,107 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c494986-8e10-4922-9ff4-acc33e77d1d9/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-11-21 22:06:39,298 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c494986-8e10-4922-9ff4-acc33e77d1d9/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-11-21 22:06:39,299 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting fibonacciErr5ASSERT_VIOLATIONINTEGER_OVERFLOW === [fibonacciErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2023-11-21 22:06:39,299 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:06:39,299 INFO L85 PathProgramCache]: Analyzing trace with hash 899011869, now seen corresponding path program 7 times [2023-11-21 22:06:39,299 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 22:06:39,299 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1685535328] [2023-11-21 22:06:39,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:06:39,300 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 22:06:39,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:06:39,589 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2023-11-21 22:06:39,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:06:39,750 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-11-21 22:06:39,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:06:39,856 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-11-21 22:06:39,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:06:39,913 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-11-21 22:06:39,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:06:39,923 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-11-21 22:06:39,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:06:39,927 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-11-21 22:06:39,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:06:39,930 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2023-11-21 22:06:39,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:06:39,931 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2023-11-21 22:06:39,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:06:39,933 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2023-11-21 22:06:39,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:06:39,982 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-11-21 22:06:39,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:06:39,985 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2023-11-21 22:06:39,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:06:39,989 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 92 [2023-11-21 22:06:39,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:06:40,006 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-11-21 22:06:40,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:06:40,011 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-11-21 22:06:40,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:06:40,013 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2023-11-21 22:06:40,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:06:40,015 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2023-11-21 22:06:40,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:06:40,017 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 151 [2023-11-21 22:06:40,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:06:40,080 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-11-21 22:06:40,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:06:40,115 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-11-21 22:06:40,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:06:40,130 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2023-11-21 22:06:40,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:06:40,133 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2023-11-21 22:06:40,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:06:40,138 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 218 [2023-11-21 22:06:40,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:06:40,152 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-11-21 22:06:40,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:06:40,160 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-11-21 22:06:40,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:06:40,165 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-11-21 22:06:40,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:06:40,167 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2023-11-21 22:06:40,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:06:40,168 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2023-11-21 22:06:40,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:06:40,171 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2023-11-21 22:06:40,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:06:40,176 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-11-21 22:06:40,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:06:40,180 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2023-11-21 22:06:40,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:06:40,184 INFO L134 CoverageAnalysis]: Checked inductivity of 3282 backedges. 622 proven. 736 refuted. 0 times theorem prover too weak. 1924 trivial. 0 not checked. [2023-11-21 22:06:40,185 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 22:06:40,185 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1685535328] [2023-11-21 22:06:40,185 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1685535328] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-21 22:06:40,185 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1399989654] [2023-11-21 22:06:40,185 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-21 22:06:40,185 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 22:06:40,186 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c494986-8e10-4922-9ff4-acc33e77d1d9/bin/uautomizer-verify-bycVGegfSx/z3 [2023-11-21 22:06:40,187 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c494986-8e10-4922-9ff4-acc33e77d1d9/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-21 22:06:40,214 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c494986-8e10-4922-9ff4-acc33e77d1d9/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-11-21 22:06:40,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:06:40,362 INFO L262 TraceCheckSpWp]: Trace formula consists of 585 conjuncts, 18 conjunts are in the unsatisfiable core [2023-11-21 22:06:40,368 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 22:06:40,530 INFO L134 CoverageAnalysis]: Checked inductivity of 3282 backedges. 1858 proven. 484 refuted. 0 times theorem prover too weak. 940 trivial. 0 not checked. [2023-11-21 22:06:40,530 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-21 22:06:42,342 INFO L134 CoverageAnalysis]: Checked inductivity of 3282 backedges. 551 proven. 1101 refuted. 0 times theorem prover too weak. 1630 trivial. 0 not checked. [2023-11-21 22:06:42,343 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1399989654] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-21 22:06:42,343 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-21 22:06:42,343 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13, 19] total 27 [2023-11-21 22:06:42,344 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1036789683] [2023-11-21 22:06:42,344 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-21 22:06:42,345 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-11-21 22:06:42,345 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 22:06:42,346 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-11-21 22:06:42,347 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=176, Invalid=526, Unknown=0, NotChecked=0, Total=702 [2023-11-21 22:06:42,347 INFO L87 Difference]: Start difference. First operand 123 states and 149 transitions. Second operand has 27 states, 27 states have (on average 5.555555555555555) internal successors, (150), 27 states have internal predecessors, (150), 22 states have call successors, (28), 2 states have call predecessors, (28), 10 states have return successors, (36), 14 states have call predecessors, (36), 22 states have call successors, (36) [2023-11-21 22:06:42,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 22:06:42,681 INFO L93 Difference]: Finished difference Result 236 states and 306 transitions. [2023-11-21 22:06:42,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-11-21 22:06:42,682 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 5.555555555555555) internal successors, (150), 27 states have internal predecessors, (150), 22 states have call successors, (28), 2 states have call predecessors, (28), 10 states have return successors, (36), 14 states have call predecessors, (36), 22 states have call successors, (36) Word has length 305 [2023-11-21 22:06:42,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 22:06:42,684 INFO L225 Difference]: With dead ends: 236 [2023-11-21 22:06:42,684 INFO L226 Difference]: Without dead ends: 117 [2023-11-21 22:06:42,686 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 692 GetRequests, 650 SyntacticMatches, 9 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 438 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=332, Invalid=858, Unknown=0, NotChecked=0, Total=1190 [2023-11-21 22:06:42,687 INFO L413 NwaCegarLoop]: 38 mSDtfsCounter, 90 mSDsluCounter, 115 mSDsCounter, 0 mSdLazyCounter, 412 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 91 SdHoareTripleChecker+Valid, 153 SdHoareTripleChecker+Invalid, 458 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 412 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-21 22:06:42,688 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [91 Valid, 153 Invalid, 458 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 412 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-21 22:06:42,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2023-11-21 22:06:42,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 105. [2023-11-21 22:06:42,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 84 states have (on average 1.0357142857142858) internal successors, (87), 82 states have internal predecessors, (87), 13 states have call successors, (13), 10 states have call predecessors, (13), 7 states have return successors, (26), 12 states have call predecessors, (26), 12 states have call successors, (26) [2023-11-21 22:06:42,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 126 transitions. [2023-11-21 22:06:42,705 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 126 transitions. Word has length 305 [2023-11-21 22:06:42,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 22:06:42,706 INFO L495 AbstractCegarLoop]: Abstraction has 105 states and 126 transitions. [2023-11-21 22:06:42,706 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 5.555555555555555) internal successors, (150), 27 states have internal predecessors, (150), 22 states have call successors, (28), 2 states have call predecessors, (28), 10 states have return successors, (36), 14 states have call predecessors, (36), 22 states have call successors, (36) [2023-11-21 22:06:42,706 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 126 transitions. [2023-11-21 22:06:42,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 502 [2023-11-21 22:06:42,710 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 22:06:42,711 INFO L195 NwaCegarLoop]: trace histogram [52, 50, 42, 26, 26, 26, 26, 25, 25, 25, 25, 25, 25, 25, 25, 24, 16, 10, 1, 1, 1] [2023-11-21 22:06:42,738 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c494986-8e10-4922-9ff4-acc33e77d1d9/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-11-21 22:06:42,930 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c494986-8e10-4922-9ff4-acc33e77d1d9/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-11-21 22:06:42,931 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting fibonacciErr5ASSERT_VIOLATIONINTEGER_OVERFLOW === [fibonacciErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2023-11-21 22:06:42,931 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:06:42,931 INFO L85 PathProgramCache]: Analyzing trace with hash 188165689, now seen corresponding path program 8 times [2023-11-21 22:06:42,931 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 22:06:42,931 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [11584092] [2023-11-21 22:06:42,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:06:42,931 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 22:06:42,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:06:43,509 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2023-11-21 22:06:43,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:06:43,693 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-11-21 22:06:43,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:06:43,797 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-11-21 22:06:43,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:06:43,881 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-11-21 22:06:43,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:06:43,924 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-11-21 22:06:43,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:06:43,984 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-11-21 22:06:43,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:06:44,001 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2023-11-21 22:06:44,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:06:44,005 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2023-11-21 22:06:44,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:06:44,011 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2023-11-21 22:06:44,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:06:44,021 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-11-21 22:06:44,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:06:44,023 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2023-11-21 22:06:44,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:06:44,025 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 92 [2023-11-21 22:06:44,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:06:44,039 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-11-21 22:06:44,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:06:44,044 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-11-21 22:06:44,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:06:44,046 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2023-11-21 22:06:44,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:06:44,048 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2023-11-21 22:06:44,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:06:44,050 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 151 [2023-11-21 22:06:44,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:06:44,073 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-11-21 22:06:44,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:06:44,080 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-11-21 22:06:44,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:06:44,085 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-11-21 22:06:44,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:06:44,087 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2023-11-21 22:06:44,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:06:44,089 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2023-11-21 22:06:44,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:06:44,091 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2023-11-21 22:06:44,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:06:44,096 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-11-21 22:06:44,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:06:44,098 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2023-11-21 22:06:44,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:06:44,101 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 257 [2023-11-21 22:06:44,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:06:44,304 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-11-21 22:06:44,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:06:44,420 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-11-21 22:06:44,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:06:44,476 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-11-21 22:06:44,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:06:44,486 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-11-21 22:06:44,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:06:44,491 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-11-21 22:06:44,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:06:44,493 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2023-11-21 22:06:44,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:06:44,495 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2023-11-21 22:06:44,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:06:44,497 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2023-11-21 22:06:44,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:06:44,559 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-11-21 22:06:44,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:06:44,562 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2023-11-21 22:06:44,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:06:44,566 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 92 [2023-11-21 22:06:44,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:06:44,579 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-11-21 22:06:44,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:06:44,584 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-11-21 22:06:44,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:06:44,586 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2023-11-21 22:06:44,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:06:44,590 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2023-11-21 22:06:44,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:06:44,592 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 151 [2023-11-21 22:06:44,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:06:44,614 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-11-21 22:06:44,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:06:44,628 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-11-21 22:06:44,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:06:44,633 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-11-21 22:06:44,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:06:44,635 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2023-11-21 22:06:44,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:06:44,638 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2023-11-21 22:06:44,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:06:44,640 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2023-11-21 22:06:44,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:06:44,676 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-11-21 22:06:44,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:06:44,678 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2023-11-21 22:06:44,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:06:44,686 INFO L134 CoverageAnalysis]: Checked inductivity of 9038 backedges. 1165 proven. 2322 refuted. 0 times theorem prover too weak. 5551 trivial. 0 not checked. [2023-11-21 22:06:44,687 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 22:06:44,687 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [11584092] [2023-11-21 22:06:44,687 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [11584092] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-21 22:06:44,687 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1219552009] [2023-11-21 22:06:44,687 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-21 22:06:44,688 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 22:06:44,688 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c494986-8e10-4922-9ff4-acc33e77d1d9/bin/uautomizer-verify-bycVGegfSx/z3 [2023-11-21 22:06:44,691 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c494986-8e10-4922-9ff4-acc33e77d1d9/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-21 22:06:44,710 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c494986-8e10-4922-9ff4-acc33e77d1d9/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-11-21 22:06:44,915 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-21 22:06:44,916 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-21 22:06:44,920 INFO L262 TraceCheckSpWp]: Trace formula consists of 947 conjuncts, 26 conjunts are in the unsatisfiable core [2023-11-21 22:06:44,929 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 22:06:45,181 INFO L134 CoverageAnalysis]: Checked inductivity of 9038 backedges. 1330 proven. 2649 refuted. 0 times theorem prover too weak. 5059 trivial. 0 not checked. [2023-11-21 22:06:45,182 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-21 22:06:48,280 INFO L134 CoverageAnalysis]: Checked inductivity of 9038 backedges. 1330 proven. 2764 refuted. 0 times theorem prover too weak. 4944 trivial. 0 not checked. [2023-11-21 22:06:48,281 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1219552009] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-21 22:06:48,281 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-21 22:06:48,282 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 17, 27] total 39 [2023-11-21 22:06:48,282 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1518670038] [2023-11-21 22:06:48,282 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-21 22:06:48,284 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2023-11-21 22:06:48,284 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 22:06:48,285 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2023-11-21 22:06:48,286 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=358, Invalid=1124, Unknown=0, NotChecked=0, Total=1482 [2023-11-21 22:06:48,287 INFO L87 Difference]: Start difference. First operand 105 states and 126 transitions. Second operand has 39 states, 39 states have (on average 5.076923076923077) internal successors, (198), 39 states have internal predecessors, (198), 33 states have call successors, (37), 1 states have call predecessors, (37), 13 states have return successors, (52), 22 states have call predecessors, (52), 33 states have call successors, (52) [2023-11-21 22:06:48,974 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 22:06:48,974 INFO L93 Difference]: Finished difference Result 249 states and 326 transitions. [2023-11-21 22:06:48,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2023-11-21 22:06:48,975 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 5.076923076923077) internal successors, (198), 39 states have internal predecessors, (198), 33 states have call successors, (37), 1 states have call predecessors, (37), 13 states have return successors, (52), 22 states have call predecessors, (52), 33 states have call successors, (52) Word has length 501 [2023-11-21 22:06:48,976 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 22:06:48,978 INFO L225 Difference]: With dead ends: 249 [2023-11-21 22:06:48,978 INFO L226 Difference]: Without dead ends: 148 [2023-11-21 22:06:48,981 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1146 GetRequests, 1074 SyntacticMatches, 13 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1393 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=931, Invalid=2729, Unknown=0, NotChecked=0, Total=3660 [2023-11-21 22:06:48,982 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 305 mSDsluCounter, 128 mSDsCounter, 0 mSdLazyCounter, 526 mSolverCounterSat, 141 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 309 SdHoareTripleChecker+Valid, 167 SdHoareTripleChecker+Invalid, 667 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 141 IncrementalHoareTripleChecker+Valid, 526 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-21 22:06:48,982 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [309 Valid, 167 Invalid, 667 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [141 Valid, 526 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-21 22:06:48,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2023-11-21 22:06:48,996 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 135. [2023-11-21 22:06:48,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135 states, 109 states have (on average 1.0458715596330275) internal successors, (114), 106 states have internal predecessors, (114), 17 states have call successors, (17), 14 states have call predecessors, (17), 8 states have return successors, (38), 14 states have call predecessors, (38), 16 states have call successors, (38) [2023-11-21 22:06:48,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 169 transitions. [2023-11-21 22:06:48,999 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 169 transitions. Word has length 501 [2023-11-21 22:06:49,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 22:06:49,002 INFO L495 AbstractCegarLoop]: Abstraction has 135 states and 169 transitions. [2023-11-21 22:06:49,002 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 5.076923076923077) internal successors, (198), 39 states have internal predecessors, (198), 33 states have call successors, (37), 1 states have call predecessors, (37), 13 states have return successors, (52), 22 states have call predecessors, (52), 33 states have call successors, (52) [2023-11-21 22:06:49,002 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 169 transitions. [2023-11-21 22:06:49,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 345 [2023-11-21 22:06:49,006 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 22:06:49,006 INFO L195 NwaCegarLoop]: trace histogram [36, 34, 29, 18, 18, 18, 18, 17, 17, 17, 17, 17, 17, 17, 17, 16, 11, 7, 1, 1, 1] [2023-11-21 22:06:49,029 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c494986-8e10-4922-9ff4-acc33e77d1d9/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-11-21 22:06:49,222 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c494986-8e10-4922-9ff4-acc33e77d1d9/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-11-21 22:06:49,222 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting fibonacciErr5ASSERT_VIOLATIONINTEGER_OVERFLOW === [fibonacciErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2023-11-21 22:06:49,222 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:06:49,223 INFO L85 PathProgramCache]: Analyzing trace with hash -1680300841, now seen corresponding path program 9 times [2023-11-21 22:06:49,223 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 22:06:49,223 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [583070355] [2023-11-21 22:06:49,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:06:49,223 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 22:06:49,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:06:49,637 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2023-11-21 22:06:49,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:06:49,830 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-11-21 22:06:49,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:06:49,941 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-11-21 22:06:49,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:06:49,997 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-11-21 22:06:50,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:06:50,008 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-11-21 22:06:50,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:06:50,013 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-11-21 22:06:50,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:06:50,016 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2023-11-21 22:06:50,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:06:50,018 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2023-11-21 22:06:50,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:06:50,020 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2023-11-21 22:06:50,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:06:50,081 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-11-21 22:06:50,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:06:50,085 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2023-11-21 22:06:50,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:06:50,088 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 92 [2023-11-21 22:06:50,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:06:50,105 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-11-21 22:06:50,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:06:50,110 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-11-21 22:06:50,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:06:50,112 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2023-11-21 22:06:50,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:06:50,115 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2023-11-21 22:06:50,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:06:50,118 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 151 [2023-11-21 22:06:50,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:06:50,142 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-11-21 22:06:50,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:06:50,150 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-11-21 22:06:50,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:06:50,154 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-11-21 22:06:50,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:06:50,156 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2023-11-21 22:06:50,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:06:50,158 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2023-11-21 22:06:50,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:06:50,160 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2023-11-21 22:06:50,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:06:50,191 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-11-21 22:06:50,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:06:50,192 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2023-11-21 22:06:50,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:06:50,194 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 257 [2023-11-21 22:06:50,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:06:50,266 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-11-21 22:06:50,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:06:50,317 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-11-21 22:06:50,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:06:50,356 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-11-21 22:06:50,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:06:50,372 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2023-11-21 22:06:50,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:06:50,376 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2023-11-21 22:06:50,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:06:50,380 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2023-11-21 22:06:50,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:06:50,389 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-11-21 22:06:50,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:06:50,391 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2023-11-21 22:06:50,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:06:50,394 INFO L134 CoverageAnalysis]: Checked inductivity of 4199 backedges. 1004 proven. 816 refuted. 0 times theorem prover too weak. 2379 trivial. 0 not checked. [2023-11-21 22:06:50,395 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 22:06:50,395 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [583070355] [2023-11-21 22:06:50,397 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [583070355] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-21 22:06:50,398 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [265395335] [2023-11-21 22:06:50,398 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-21 22:06:50,398 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 22:06:50,398 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c494986-8e10-4922-9ff4-acc33e77d1d9/bin/uautomizer-verify-bycVGegfSx/z3 [2023-11-21 22:06:50,399 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c494986-8e10-4922-9ff4-acc33e77d1d9/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-21 22:06:50,418 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c494986-8e10-4922-9ff4-acc33e77d1d9/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-11-21 22:06:50,597 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2023-11-21 22:06:50,598 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-21 22:06:50,600 INFO L262 TraceCheckSpWp]: Trace formula consists of 394 conjuncts, 16 conjunts are in the unsatisfiable core [2023-11-21 22:06:50,606 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 22:06:50,748 INFO L134 CoverageAnalysis]: Checked inductivity of 4199 backedges. 1160 proven. 417 refuted. 0 times theorem prover too weak. 2622 trivial. 0 not checked. [2023-11-21 22:06:50,748 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-21 22:06:51,874 INFO L134 CoverageAnalysis]: Checked inductivity of 4199 backedges. 1164 proven. 447 refuted. 0 times theorem prover too weak. 2588 trivial. 0 not checked. [2023-11-21 22:06:51,875 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [265395335] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-21 22:06:51,875 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-21 22:06:51,875 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 12, 17] total 29 [2023-11-21 22:06:51,876 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [941446862] [2023-11-21 22:06:51,876 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-21 22:06:51,877 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-11-21 22:06:51,877 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 22:06:51,878 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-11-21 22:06:51,879 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=207, Invalid=605, Unknown=0, NotChecked=0, Total=812 [2023-11-21 22:06:51,879 INFO L87 Difference]: Start difference. First operand 135 states and 169 transitions. Second operand has 29 states, 29 states have (on average 5.0344827586206895) internal successors, (146), 29 states have internal predecessors, (146), 18 states have call successors, (27), 1 states have call predecessors, (27), 10 states have return successors, (35), 22 states have call predecessors, (35), 18 states have call successors, (35) [2023-11-21 22:06:52,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 22:06:52,336 INFO L93 Difference]: Finished difference Result 281 states and 357 transitions. [2023-11-21 22:06:52,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2023-11-21 22:06:52,337 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 5.0344827586206895) internal successors, (146), 29 states have internal predecessors, (146), 18 states have call successors, (27), 1 states have call predecessors, (27), 10 states have return successors, (35), 22 states have call predecessors, (35), 18 states have call successors, (35) Word has length 344 [2023-11-21 22:06:52,340 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 22:06:52,342 INFO L225 Difference]: With dead ends: 281 [2023-11-21 22:06:52,342 INFO L226 Difference]: Without dead ends: 150 [2023-11-21 22:06:52,344 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 784 GetRequests, 738 SyntacticMatches, 8 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 533 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=420, Invalid=1140, Unknown=0, NotChecked=0, Total=1560 [2023-11-21 22:06:52,345 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 94 mSDsluCounter, 140 mSDsCounter, 0 mSdLazyCounter, 536 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 96 SdHoareTripleChecker+Valid, 179 SdHoareTripleChecker+Invalid, 582 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 536 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-21 22:06:52,345 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [96 Valid, 179 Invalid, 582 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 536 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-21 22:06:52,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2023-11-21 22:06:52,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 132. [2023-11-21 22:06:52,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 132 states, 106 states have (on average 1.0377358490566038) internal successors, (110), 104 states have internal predecessors, (110), 17 states have call successors, (17), 14 states have call predecessors, (17), 8 states have return successors, (31), 13 states have call predecessors, (31), 16 states have call successors, (31) [2023-11-21 22:06:52,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 158 transitions. [2023-11-21 22:06:52,359 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 158 transitions. Word has length 344 [2023-11-21 22:06:52,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 22:06:52,362 INFO L495 AbstractCegarLoop]: Abstraction has 132 states and 158 transitions. [2023-11-21 22:06:52,363 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 5.0344827586206895) internal successors, (146), 29 states have internal predecessors, (146), 18 states have call successors, (27), 1 states have call predecessors, (27), 10 states have return successors, (35), 22 states have call predecessors, (35), 18 states have call successors, (35) [2023-11-21 22:06:52,363 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 158 transitions. [2023-11-21 22:06:52,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 404 [2023-11-21 22:06:52,366 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 22:06:52,366 INFO L195 NwaCegarLoop]: trace histogram [42, 40, 34, 21, 21, 21, 21, 20, 20, 20, 20, 20, 20, 20, 20, 19, 13, 8, 1, 1, 1] [2023-11-21 22:06:52,390 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c494986-8e10-4922-9ff4-acc33e77d1d9/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2023-11-21 22:06:52,587 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c494986-8e10-4922-9ff4-acc33e77d1d9/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-11-21 22:06:52,587 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting fibonacciErr5ASSERT_VIOLATIONINTEGER_OVERFLOW === [fibonacciErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2023-11-21 22:06:52,588 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:06:52,588 INFO L85 PathProgramCache]: Analyzing trace with hash 1978905942, now seen corresponding path program 10 times [2023-11-21 22:06:52,588 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 22:06:52,588 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1995082716] [2023-11-21 22:06:52,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:06:52,588 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 22:06:52,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:06:54,442 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2023-11-21 22:06:54,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:06:54,866 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-11-21 22:06:54,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:06:55,085 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-11-21 22:06:55,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:06:55,175 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-11-21 22:06:55,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:06:55,233 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-11-21 22:06:55,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:06:55,270 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-11-21 22:06:55,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:06:55,277 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2023-11-21 22:06:55,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:06:55,293 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2023-11-21 22:06:55,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:06:55,299 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2023-11-21 22:06:55,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:06:55,317 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-11-21 22:06:55,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:06:55,321 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2023-11-21 22:06:55,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:06:55,326 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 92 [2023-11-21 22:06:55,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:06:55,358 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-11-21 22:06:55,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:06:55,374 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-11-21 22:06:55,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:06:55,380 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2023-11-21 22:06:55,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:06:55,385 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2023-11-21 22:06:55,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:06:55,395 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 151 [2023-11-21 22:06:55,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:06:55,466 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-11-21 22:06:55,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:06:55,495 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-11-21 22:06:55,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:06:55,511 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-11-21 22:06:55,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:06:55,517 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2023-11-21 22:06:55,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:06:55,522 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2023-11-21 22:06:55,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:06:55,527 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2023-11-21 22:06:55,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:06:55,544 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-11-21 22:06:55,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:06:55,549 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2023-11-21 22:06:55,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:06:55,554 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 257 [2023-11-21 22:06:55,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:06:55,720 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-11-21 22:06:55,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:06:55,789 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-11-21 22:06:55,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:06:55,819 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-11-21 22:06:55,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:06:55,835 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-11-21 22:06:55,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:06:55,840 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2023-11-21 22:06:55,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:06:55,845 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2023-11-21 22:06:55,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:06:55,851 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2023-11-21 22:06:55,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:06:55,870 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-11-21 22:06:55,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:06:55,875 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2023-11-21 22:06:55,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:06:55,880 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 92 [2023-11-21 22:06:55,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:06:55,912 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-11-21 22:06:55,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:06:55,928 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-11-21 22:06:55,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:06:55,933 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2023-11-21 22:06:55,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:06:55,964 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2023-11-21 22:06:55,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:06:55,972 INFO L134 CoverageAnalysis]: Checked inductivity of 5803 backedges. 820 proven. 1112 refuted. 0 times theorem prover too weak. 3871 trivial. 0 not checked. [2023-11-21 22:06:55,972 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 22:06:55,972 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1995082716] [2023-11-21 22:06:55,972 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1995082716] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-21 22:06:55,972 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1994354253] [2023-11-21 22:06:55,973 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-21 22:06:55,973 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 22:06:55,973 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c494986-8e10-4922-9ff4-acc33e77d1d9/bin/uautomizer-verify-bycVGegfSx/z3 [2023-11-21 22:06:55,975 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c494986-8e10-4922-9ff4-acc33e77d1d9/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-21 22:06:56,002 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c494986-8e10-4922-9ff4-acc33e77d1d9/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-11-21 22:06:56,219 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-21 22:06:56,219 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-21 22:06:56,223 INFO L262 TraceCheckSpWp]: Trace formula consists of 766 conjuncts, 81 conjunts are in the unsatisfiable core [2023-11-21 22:06:56,241 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 22:06:56,756 INFO L134 CoverageAnalysis]: Checked inductivity of 5803 backedges. 820 proven. 1112 refuted. 0 times theorem prover too weak. 3871 trivial. 0 not checked. [2023-11-21 22:06:56,756 INFO L327 TraceCheckSpWp]: Computing backward predicates...