./Ultimate.py --spec ../../sv-benchmarks/c/properties/no-overflow.prp --file ../../sv-benchmarks/c/termination-crafted-lit/HarrisLalNoriRajamani-SAS2010-Fig1.c --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for overflows Using default analysis Version 30e01a73 Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4431346-91ef-48a5-8c95-5e94ca4d268a/bin/utaipan-verify-mE87zJ7Ire/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4431346-91ef-48a5-8c95-5e94ca4d268a/bin/utaipan-verify-mE87zJ7Ire/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4431346-91ef-48a5-8c95-5e94ca4d268a/bin/utaipan-verify-mE87zJ7Ire/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4431346-91ef-48a5-8c95-5e94ca4d268a/bin/utaipan-verify-mE87zJ7Ire/config/TaipanReach.xml -i ../../sv-benchmarks/c/termination-crafted-lit/HarrisLalNoriRajamani-SAS2010-Fig1.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4431346-91ef-48a5-8c95-5e94ca4d268a/bin/utaipan-verify-mE87zJ7Ire/config/svcomp-Overflow-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4431346-91ef-48a5-8c95-5e94ca4d268a/bin/utaipan-verify-mE87zJ7Ire --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! overflow) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 64bit --witnessprinter.graph.data.programhash de331d1f778f147a4d32c0286c0018cb5b5cf61f2b6c0952b6bed68b0f715eaf --- Real Ultimate output --- This is Ultimate 0.2.3-dev-30e01a7 [2023-11-23 21:09:14,082 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-23 21:09:14,213 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4431346-91ef-48a5-8c95-5e94ca4d268a/bin/utaipan-verify-mE87zJ7Ire/config/svcomp-Overflow-64bit-Taipan_Default.epf [2023-11-23 21:09:14,220 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-23 21:09:14,221 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-23 21:09:14,262 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-23 21:09:14,263 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-23 21:09:14,264 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-23 21:09:14,265 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-23 21:09:14,272 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-23 21:09:14,273 INFO L153 SettingsManager]: * User list type=DISABLED [2023-11-23 21:09:14,274 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-11-23 21:09:14,275 INFO L153 SettingsManager]: * Explicit value domain=true [2023-11-23 21:09:14,276 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-11-23 21:09:14,277 INFO L153 SettingsManager]: * Octagon Domain=false [2023-11-23 21:09:14,277 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-11-23 21:09:14,278 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-11-23 21:09:14,278 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-11-23 21:09:14,279 INFO L153 SettingsManager]: * Interval Domain=false [2023-11-23 21:09:14,279 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-11-23 21:09:14,280 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-11-23 21:09:14,280 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-11-23 21:09:14,282 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-23 21:09:14,282 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-23 21:09:14,283 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-23 21:09:14,283 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-23 21:09:14,284 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-23 21:09:14,284 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-23 21:09:14,284 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-23 21:09:14,285 INFO L153 SettingsManager]: * Check absence of signed integer overflows=true [2023-11-23 21:09:14,286 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-23 21:09:14,287 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-23 21:09:14,287 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-23 21:09:14,287 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-23 21:09:14,287 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-23 21:09:14,288 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-23 21:09:14,288 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-23 21:09:14,288 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-23 21:09:14,289 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-23 21:09:14,289 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-23 21:09:14,289 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-11-23 21:09:14,290 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-23 21:09:14,290 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-23 21:09:14,290 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-23 21:09:14,291 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-11-23 21:09:14,291 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-23 21:09:14,291 INFO L153 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4431346-91ef-48a5-8c95-5e94ca4d268a/bin/utaipan-verify-mE87zJ7Ire/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4431346-91ef-48a5-8c95-5e94ca4d268a/bin/utaipan-verify-mE87zJ7Ire Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! overflow) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> de331d1f778f147a4d32c0286c0018cb5b5cf61f2b6c0952b6bed68b0f715eaf [2023-11-23 21:09:14,640 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-23 21:09:14,672 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-23 21:09:14,675 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-23 21:09:14,677 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-23 21:09:14,678 INFO L274 PluginConnector]: CDTParser initialized [2023-11-23 21:09:14,680 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4431346-91ef-48a5-8c95-5e94ca4d268a/bin/utaipan-verify-mE87zJ7Ire/../../sv-benchmarks/c/termination-crafted-lit/HarrisLalNoriRajamani-SAS2010-Fig1.c [2023-11-23 21:09:17,850 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-23 21:09:18,081 INFO L384 CDTParser]: Found 1 translation units. [2023-11-23 21:09:18,082 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4431346-91ef-48a5-8c95-5e94ca4d268a/sv-benchmarks/c/termination-crafted-lit/HarrisLalNoriRajamani-SAS2010-Fig1.c [2023-11-23 21:09:18,090 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4431346-91ef-48a5-8c95-5e94ca4d268a/bin/utaipan-verify-mE87zJ7Ire/data/58c50a96f/b4ace73d09d448129cc6441c6130705f/FLAGe86d3d183 [2023-11-23 21:09:18,106 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4431346-91ef-48a5-8c95-5e94ca4d268a/bin/utaipan-verify-mE87zJ7Ire/data/58c50a96f/b4ace73d09d448129cc6441c6130705f [2023-11-23 21:09:18,109 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-23 21:09:18,111 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-23 21:09:18,112 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-23 21:09:18,113 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-23 21:09:18,119 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-23 21:09:18,119 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 09:09:18" (1/1) ... [2023-11-23 21:09:18,121 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@51358068 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:09:18, skipping insertion in model container [2023-11-23 21:09:18,121 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 09:09:18" (1/1) ... [2023-11-23 21:09:18,142 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-23 21:09:18,340 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-23 21:09:18,346 INFO L202 MainTranslator]: Completed pre-run [2023-11-23 21:09:18,373 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-23 21:09:18,386 INFO L206 MainTranslator]: Completed translation [2023-11-23 21:09:18,386 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:09:18 WrapperNode [2023-11-23 21:09:18,387 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-23 21:09:18,388 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-23 21:09:18,388 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-23 21:09:18,388 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-23 21:09:18,396 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:09:18" (1/1) ... [2023-11-23 21:09:18,401 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:09:18" (1/1) ... [2023-11-23 21:09:18,417 INFO L138 Inliner]: procedures = 5, calls = 4, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 9 [2023-11-23 21:09:18,417 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-23 21:09:18,418 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-23 21:09:18,418 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-23 21:09:18,418 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-23 21:09:18,428 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:09:18" (1/1) ... [2023-11-23 21:09:18,429 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:09:18" (1/1) ... [2023-11-23 21:09:18,430 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:09:18" (1/1) ... [2023-11-23 21:09:18,430 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:09:18" (1/1) ... [2023-11-23 21:09:18,432 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:09:18" (1/1) ... [2023-11-23 21:09:18,437 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:09:18" (1/1) ... [2023-11-23 21:09:18,438 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:09:18" (1/1) ... [2023-11-23 21:09:18,439 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:09:18" (1/1) ... [2023-11-23 21:09:18,441 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-23 21:09:18,442 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-23 21:09:18,442 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-23 21:09:18,442 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-23 21:09:18,443 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:09:18" (1/1) ... [2023-11-23 21:09:18,449 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-23 21:09:18,464 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4431346-91ef-48a5-8c95-5e94ca4d268a/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 21:09:18,475 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4431346-91ef-48a5-8c95-5e94ca4d268a/bin/utaipan-verify-mE87zJ7Ire/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-23 21:09:18,478 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4431346-91ef-48a5-8c95-5e94ca4d268a/bin/utaipan-verify-mE87zJ7Ire/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-23 21:09:18,521 INFO L130 BoogieDeclarations]: Found specification of procedure f [2023-11-23 21:09:18,522 INFO L138 BoogieDeclarations]: Found implementation of procedure f [2023-11-23 21:09:18,522 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-23 21:09:18,522 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-23 21:09:18,594 INFO L241 CfgBuilder]: Building ICFG [2023-11-23 21:09:18,597 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-23 21:09:18,828 INFO L282 CfgBuilder]: Performing block encoding [2023-11-23 21:09:18,848 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-23 21:09:18,849 INFO L309 CfgBuilder]: Removed 2 assume(true) statements. [2023-11-23 21:09:18,850 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 09:09:18 BoogieIcfgContainer [2023-11-23 21:09:18,851 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-23 21:09:18,854 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-23 21:09:18,854 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-23 21:09:18,857 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-23 21:09:18,858 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 09:09:18" (1/3) ... [2023-11-23 21:09:18,859 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3ace4511 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 09:09:18, skipping insertion in model container [2023-11-23 21:09:18,859 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:09:18" (2/3) ... [2023-11-23 21:09:18,859 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3ace4511 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 09:09:18, skipping insertion in model container [2023-11-23 21:09:18,860 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 09:09:18" (3/3) ... [2023-11-23 21:09:18,861 INFO L112 eAbstractionObserver]: Analyzing ICFG HarrisLalNoriRajamani-SAS2010-Fig1.c [2023-11-23 21:09:18,882 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-23 21:09:18,882 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 8 error locations. [2023-11-23 21:09:18,939 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-23 21:09:18,948 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopHeads, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@699ad0f0, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-23 21:09:18,948 INFO L358 AbstractCegarLoop]: Starting to check reachability of 8 error locations. [2023-11-23 21:09:18,953 INFO L276 IsEmpty]: Start isEmpty. Operand has 29 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 26 states have internal predecessors, (30), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-23 21:09:18,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2023-11-23 21:09:18,962 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:09:18,963 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:09:18,964 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting fErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [fErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr3ASSERT_VIOLATIONINTEGER_OVERFLOW (and 4 more)] === [2023-11-23 21:09:18,971 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:09:18,972 INFO L85 PathProgramCache]: Analyzing trace with hash 247949617, now seen corresponding path program 1 times [2023-11-23 21:09:18,984 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:09:18,984 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [374170311] [2023-11-23 21:09:18,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:09:18,985 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:09:19,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:09:19,153 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 21:09:19,154 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:09:19,154 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [374170311] [2023-11-23 21:09:19,155 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [374170311] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:09:19,155 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:09:19,156 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-23 21:09:19,157 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1636581188] [2023-11-23 21:09:19,158 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:09:19,174 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 21:09:19,174 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:09:19,204 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 21:09:19,205 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 21:09:19,208 INFO L87 Difference]: Start difference. First operand has 29 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 26 states have internal predecessors, (30), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 3 states, 2 states have (on average 3.0) 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) [2023-11-23 21:09:19,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:09:19,262 INFO L93 Difference]: Finished difference Result 44 states and 53 transitions. [2023-11-23 21:09:19,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 21:09:19,265 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.0) 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 [2023-11-23 21:09:19,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:09:19,284 INFO L225 Difference]: With dead ends: 44 [2023-11-23 21:09:19,284 INFO L226 Difference]: Without dead ends: 36 [2023-11-23 21:09:19,287 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 [2023-11-23 21:09:19,291 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 19 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-23 21:09:19,293 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 40 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-23 21:09:19,310 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2023-11-23 21:09:19,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 31. [2023-11-23 21:09:19,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 22 states have (on average 1.6818181818181819) internal successors, (37), 29 states have internal predecessors, (37), 2 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:09:19,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 39 transitions. [2023-11-23 21:09:19,329 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 39 transitions. Word has length 7 [2023-11-23 21:09:19,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:09:19,330 INFO L495 AbstractCegarLoop]: Abstraction has 31 states and 39 transitions. [2023-11-23 21:09:19,330 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.0) 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) [2023-11-23 21:09:19,330 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 39 transitions. [2023-11-23 21:09:19,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2023-11-23 21:09:19,331 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:09:19,331 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:09:19,332 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-23 21:09:19,332 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting fErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [fErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr3ASSERT_VIOLATIONINTEGER_OVERFLOW (and 4 more)] === [2023-11-23 21:09:19,333 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:09:19,333 INFO L85 PathProgramCache]: Analyzing trace with hash -903496418, now seen corresponding path program 1 times [2023-11-23 21:09:19,333 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:09:19,334 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [9878656] [2023-11-23 21:09:19,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:09:19,334 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:09:19,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:09:19,383 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 21:09:19,383 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:09:19,383 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [9878656] [2023-11-23 21:09:19,384 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [9878656] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:09:19,384 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:09:19,384 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-23 21:09:19,385 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [396876603] [2023-11-23 21:09:19,385 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:09:19,386 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 21:09:19,386 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:09:19,387 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 21:09:19,387 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 21:09:19,388 INFO L87 Difference]: Start difference. First operand 31 states and 39 transitions. Second operand has 3 states, 2 states have (on average 3.5) internal successors, (7), 3 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:09:19,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:09:19,427 INFO L93 Difference]: Finished difference Result 55 states and 71 transitions. [2023-11-23 21:09:19,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 21:09:19,428 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 3 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2023-11-23 21:09:19,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:09:19,430 INFO L225 Difference]: With dead ends: 55 [2023-11-23 21:09:19,430 INFO L226 Difference]: Without dead ends: 53 [2023-11-23 21:09:19,431 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 [2023-11-23 21:09:19,432 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 14 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-23 21:09:19,433 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 34 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-23 21:09:19,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2023-11-23 21:09:19,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 49. [2023-11-23 21:09:19,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 40 states have (on average 1.675) internal successors, (67), 47 states have internal predecessors, (67), 2 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:09:19,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 69 transitions. [2023-11-23 21:09:19,446 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 69 transitions. Word has length 8 [2023-11-23 21:09:19,446 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:09:19,447 INFO L495 AbstractCegarLoop]: Abstraction has 49 states and 69 transitions. [2023-11-23 21:09:19,447 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 3 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:09:19,447 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 69 transitions. [2023-11-23 21:09:19,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2023-11-23 21:09:19,448 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:09:19,448 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:09:19,449 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-23 21:09:19,449 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting fErr6ASSERT_VIOLATIONINTEGER_OVERFLOW === [fErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr3ASSERT_VIOLATIONINTEGER_OVERFLOW (and 4 more)] === [2023-11-23 21:09:19,450 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:09:19,450 INFO L85 PathProgramCache]: Analyzing trace with hash 2058153125, now seen corresponding path program 1 times [2023-11-23 21:09:19,450 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:09:19,451 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1477335820] [2023-11-23 21:09:19,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:09:19,451 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:09:19,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:09:19,532 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 21:09:19,533 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:09:19,533 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1477335820] [2023-11-23 21:09:19,534 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1477335820] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:09:19,534 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:09:19,534 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-23 21:09:19,534 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2146754013] [2023-11-23 21:09:19,535 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:09:19,535 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-23 21:09:19,535 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:09:19,536 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-23 21:09:19,537 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-23 21:09:19,537 INFO L87 Difference]: Start difference. First operand 49 states and 69 transitions. Second operand has 5 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:09:19,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:09:19,672 INFO L93 Difference]: Finished difference Result 94 states and 133 transitions. [2023-11-23 21:09:19,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-23 21:09:19,680 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2023-11-23 21:09:19,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:09:19,683 INFO L225 Difference]: With dead ends: 94 [2023-11-23 21:09:19,683 INFO L226 Difference]: Without dead ends: 93 [2023-11-23 21:09:19,683 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-11-23 21:09:19,685 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 45 mSDsluCounter, 53 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 70 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-23 21:09:19,686 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [45 Valid, 70 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-23 21:09:19,687 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2023-11-23 21:09:19,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 87. [2023-11-23 21:09:19,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 78 states have (on average 1.6282051282051282) internal successors, (127), 84 states have internal predecessors, (127), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:09:19,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 129 transitions. [2023-11-23 21:09:19,705 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 129 transitions. Word has length 9 [2023-11-23 21:09:19,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:09:19,705 INFO L495 AbstractCegarLoop]: Abstraction has 87 states and 129 transitions. [2023-11-23 21:09:19,706 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:09:19,706 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 129 transitions. [2023-11-23 21:09:19,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2023-11-23 21:09:19,707 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:09:19,707 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:09:19,707 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-23 21:09:19,707 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting fErr2ASSERT_VIOLATIONINTEGER_OVERFLOW === [fErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr3ASSERT_VIOLATIONINTEGER_OVERFLOW (and 4 more)] === [2023-11-23 21:09:19,708 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:09:19,708 INFO L85 PathProgramCache]: Analyzing trace with hash 2058152774, now seen corresponding path program 1 times [2023-11-23 21:09:19,708 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:09:19,709 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1296622005] [2023-11-23 21:09:19,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:09:19,709 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:09:19,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:09:19,803 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 21:09:19,803 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:09:19,803 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1296622005] [2023-11-23 21:09:19,803 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1296622005] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:09:19,804 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:09:19,804 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-23 21:09:19,804 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [804279282] [2023-11-23 21:09:19,804 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:09:19,805 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-23 21:09:19,805 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:09:19,806 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-23 21:09:19,806 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-23 21:09:19,806 INFO L87 Difference]: Start difference. First operand 87 states and 129 transitions. Second operand has 5 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:09:19,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:09:19,924 INFO L93 Difference]: Finished difference Result 97 states and 133 transitions. [2023-11-23 21:09:19,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-23 21:09:19,925 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2023-11-23 21:09:19,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:09:19,926 INFO L225 Difference]: With dead ends: 97 [2023-11-23 21:09:19,926 INFO L226 Difference]: Without dead ends: 96 [2023-11-23 21:09:19,927 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-11-23 21:09:19,928 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 43 mSDsluCounter, 53 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 71 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-23 21:09:19,929 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [43 Valid, 71 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-23 21:09:19,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2023-11-23 21:09:19,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 87. [2023-11-23 21:09:19,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 78 states have (on average 1.5769230769230769) internal successors, (123), 84 states have internal predecessors, (123), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:09:19,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 125 transitions. [2023-11-23 21:09:19,945 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 125 transitions. Word has length 9 [2023-11-23 21:09:19,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:09:19,945 INFO L495 AbstractCegarLoop]: Abstraction has 87 states and 125 transitions. [2023-11-23 21:09:19,945 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:09:19,946 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 125 transitions. [2023-11-23 21:09:19,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2023-11-23 21:09:19,947 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:09:19,947 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:09:19,947 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-23 21:09:19,947 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting fErr6ASSERT_VIOLATIONINTEGER_OVERFLOW === [fErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr3ASSERT_VIOLATIONINTEGER_OVERFLOW (and 4 more)] === [2023-11-23 21:09:19,948 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:09:19,948 INFO L85 PathProgramCache]: Analyzing trace with hash 471656900, now seen corresponding path program 1 times [2023-11-23 21:09:19,949 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:09:19,949 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1513230083] [2023-11-23 21:09:19,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:09:19,949 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:09:19,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:09:20,018 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 21:09:20,018 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:09:20,019 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1513230083] [2023-11-23 21:09:20,019 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1513230083] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:09:20,019 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:09:20,019 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-23 21:09:20,020 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1438558981] [2023-11-23 21:09:20,020 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:09:20,020 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-23 21:09:20,021 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:09:20,021 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-23 21:09:20,022 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-23 21:09:20,022 INFO L87 Difference]: Start difference. First operand 87 states and 125 transitions. Second operand has 5 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:09:20,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:09:20,078 INFO L93 Difference]: Finished difference Result 87 states and 125 transitions. [2023-11-23 21:09:20,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-23 21:09:20,079 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2023-11-23 21:09:20,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:09:20,080 INFO L225 Difference]: With dead ends: 87 [2023-11-23 21:09:20,080 INFO L226 Difference]: Without dead ends: 86 [2023-11-23 21:09:20,081 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-11-23 21:09:20,083 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 45 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-23 21:09:20,084 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [45 Valid, 35 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-23 21:09:20,085 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2023-11-23 21:09:20,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 86. [2023-11-23 21:09:20,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 78 states have (on average 1.5256410256410255) internal successors, (119), 83 states have internal predecessors, (119), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:09:20,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 121 transitions. [2023-11-23 21:09:20,113 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 121 transitions. Word has length 9 [2023-11-23 21:09:20,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:09:20,113 INFO L495 AbstractCegarLoop]: Abstraction has 86 states and 121 transitions. [2023-11-23 21:09:20,114 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:09:20,114 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 121 transitions. [2023-11-23 21:09:20,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2023-11-23 21:09:20,115 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:09:20,115 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:09:20,115 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-23 21:09:20,115 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting fErr2ASSERT_VIOLATIONINTEGER_OVERFLOW === [fErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr3ASSERT_VIOLATIONINTEGER_OVERFLOW (and 4 more)] === [2023-11-23 21:09:20,116 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:09:20,116 INFO L85 PathProgramCache]: Analyzing trace with hash 471656549, now seen corresponding path program 1 times [2023-11-23 21:09:20,116 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:09:20,117 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [214629826] [2023-11-23 21:09:20,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:09:20,118 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:09:20,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:09:20,201 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 21:09:20,202 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:09:20,202 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [214629826] [2023-11-23 21:09:20,202 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [214629826] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:09:20,203 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:09:20,203 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-23 21:09:20,203 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [221778875] [2023-11-23 21:09:20,203 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:09:20,204 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-23 21:09:20,204 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:09:20,204 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-23 21:09:20,205 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-23 21:09:20,205 INFO L87 Difference]: Start difference. First operand 86 states and 121 transitions. Second operand has 5 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:09:20,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:09:20,248 INFO L93 Difference]: Finished difference Result 94 states and 129 transitions. [2023-11-23 21:09:20,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-23 21:09:20,249 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2023-11-23 21:09:20,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:09:20,250 INFO L225 Difference]: With dead ends: 94 [2023-11-23 21:09:20,250 INFO L226 Difference]: Without dead ends: 93 [2023-11-23 21:09:20,251 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-11-23 21:09:20,252 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 43 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-23 21:09:20,253 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [43 Valid, 35 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-23 21:09:20,254 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2023-11-23 21:09:20,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 47. [2023-11-23 21:09:20,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 40 states have (on average 1.475) internal successors, (59), 45 states have internal predecessors, (59), 2 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:09:20,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 61 transitions. [2023-11-23 21:09:20,263 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 61 transitions. Word has length 9 [2023-11-23 21:09:20,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:09:20,263 INFO L495 AbstractCegarLoop]: Abstraction has 47 states and 61 transitions. [2023-11-23 21:09:20,263 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:09:20,264 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 61 transitions. [2023-11-23 21:09:20,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2023-11-23 21:09:20,264 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:09:20,264 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:09:20,265 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-23 21:09:20,265 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting fErr7ASSERT_VIOLATIONINTEGER_OVERFLOW === [fErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr3ASSERT_VIOLATIONINTEGER_OVERFLOW (and 4 more)] === [2023-11-23 21:09:20,266 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:09:20,266 INFO L85 PathProgramCache]: Analyzing trace with hash -621762489, now seen corresponding path program 1 times [2023-11-23 21:09:20,266 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:09:20,266 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [508610756] [2023-11-23 21:09:20,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:09:20,267 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:09:20,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:09:20,330 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 21:09:20,331 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:09:20,331 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [508610756] [2023-11-23 21:09:20,331 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [508610756] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:09:20,331 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:09:20,332 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-23 21:09:20,332 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [630687359] [2023-11-23 21:09:20,332 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:09:20,332 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-23 21:09:20,333 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:09:20,333 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-23 21:09:20,334 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-23 21:09:20,334 INFO L87 Difference]: Start difference. First operand 47 states and 61 transitions. Second operand has 4 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:09:20,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:09:20,370 INFO L93 Difference]: Finished difference Result 61 states and 79 transitions. [2023-11-23 21:09:20,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-23 21:09:20,371 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2023-11-23 21:09:20,371 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:09:20,372 INFO L225 Difference]: With dead ends: 61 [2023-11-23 21:09:20,372 INFO L226 Difference]: Without dead ends: 60 [2023-11-23 21:09:20,373 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-23 21:09:20,374 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 35 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-23 21:09:20,375 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [35 Valid, 28 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-23 21:09:20,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2023-11-23 21:09:20,383 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 55. [2023-11-23 21:09:20,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 48 states have (on average 1.4375) internal successors, (69), 53 states have internal predecessors, (69), 2 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:09:20,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 71 transitions. [2023-11-23 21:09:20,385 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 71 transitions. Word has length 10 [2023-11-23 21:09:20,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:09:20,386 INFO L495 AbstractCegarLoop]: Abstraction has 55 states and 71 transitions. [2023-11-23 21:09:20,386 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:09:20,386 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 71 transitions. [2023-11-23 21:09:20,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2023-11-23 21:09:20,387 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:09:20,387 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:09:20,387 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-11-23 21:09:20,388 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting fErr3ASSERT_VIOLATIONINTEGER_OVERFLOW === [fErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr3ASSERT_VIOLATIONINTEGER_OVERFLOW (and 4 more)] === [2023-11-23 21:09:20,388 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:09:20,388 INFO L85 PathProgramCache]: Analyzing trace with hash -621773380, now seen corresponding path program 1 times [2023-11-23 21:09:20,389 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:09:20,389 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1234283869] [2023-11-23 21:09:20,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:09:20,389 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:09:20,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:09:20,451 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 21:09:20,451 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:09:20,452 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1234283869] [2023-11-23 21:09:20,452 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1234283869] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:09:20,452 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:09:20,452 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-23 21:09:20,452 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [60620069] [2023-11-23 21:09:20,455 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:09:20,456 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-23 21:09:20,456 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:09:20,457 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-23 21:09:20,457 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-23 21:09:20,458 INFO L87 Difference]: Start difference. First operand 55 states and 71 transitions. Second operand has 4 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:09:20,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:09:20,499 INFO L93 Difference]: Finished difference Result 57 states and 71 transitions. [2023-11-23 21:09:20,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-23 21:09:20,500 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2023-11-23 21:09:20,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:09:20,501 INFO L225 Difference]: With dead ends: 57 [2023-11-23 21:09:20,501 INFO L226 Difference]: Without dead ends: 56 [2023-11-23 21:09:20,502 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-23 21:09:20,503 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 36 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-23 21:09:20,504 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [36 Valid, 28 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-23 21:09:20,505 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2023-11-23 21:09:20,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 55. [2023-11-23 21:09:20,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 48 states have (on average 1.3958333333333333) internal successors, (67), 53 states have internal predecessors, (67), 2 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:09:20,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 69 transitions. [2023-11-23 21:09:20,515 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 69 transitions. Word has length 10 [2023-11-23 21:09:20,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:09:20,515 INFO L495 AbstractCegarLoop]: Abstraction has 55 states and 69 transitions. [2023-11-23 21:09:20,515 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:09:20,516 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 69 transitions. [2023-11-23 21:09:20,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2023-11-23 21:09:20,516 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:09:20,517 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:09:20,517 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-11-23 21:09:20,517 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting fErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [fErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr3ASSERT_VIOLATIONINTEGER_OVERFLOW (and 4 more)] === [2023-11-23 21:09:20,518 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:09:20,518 INFO L85 PathProgramCache]: Analyzing trace with hash 498298159, now seen corresponding path program 1 times [2023-11-23 21:09:20,518 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:09:20,518 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [612555958] [2023-11-23 21:09:20,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:09:20,519 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:09:20,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:09:20,556 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 21:09:20,556 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:09:20,557 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [612555958] [2023-11-23 21:09:20,557 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [612555958] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 21:09:20,558 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1272924155] [2023-11-23 21:09:20,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:09:20,558 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:09:20,559 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4431346-91ef-48a5-8c95-5e94ca4d268a/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 21:09:20,561 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4431346-91ef-48a5-8c95-5e94ca4d268a/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 21:09:20,572 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4431346-91ef-48a5-8c95-5e94ca4d268a/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-23 21:09:20,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:09:20,612 INFO L262 TraceCheckSpWp]: Trace formula consists of 28 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-23 21:09:20,616 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 21:09:20,668 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 21:09:20,669 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 21:09:20,715 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 21:09:20,716 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1272924155] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 21:09:20,717 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1336798228] [2023-11-23 21:09:20,744 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2023-11-23 21:09:20,745 INFO L166 IcfgInterpreter]: Building call graph [2023-11-23 21:09:20,748 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-23 21:09:20,755 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-23 21:09:20,755 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-23 21:09:20,789 INFO L197 IcfgInterpreter]: Interpreting procedure f with input of size 15 for LOIs [2023-11-23 21:09:21,152 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-23 21:09:21,506 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1445#(and (= |f_#in~d| 1) (= f_~d 1) (<= 2 f_~k~0) (<= 1073741824 f_~z~0) (<= f_~x~0 2147483647) (<= f_~k~0 1073741823) (<= f_~y~0 2147483647) (<= 0 (+ f_~y~0 2147483648)) (<= 0 (+ f_~x~0 2147483648)))' at error location [2023-11-23 21:09:21,506 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-23 21:09:21,506 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-23 21:09:21,506 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 5 [2023-11-23 21:09:21,507 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1545268906] [2023-11-23 21:09:21,507 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-23 21:09:21,507 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-23 21:09:21,507 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:09:21,508 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-23 21:09:21,508 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2023-11-23 21:09:21,508 INFO L87 Difference]: Start difference. First operand 55 states and 69 transitions. Second operand has 6 states, 5 states have (on average 3.6) internal successors, (18), 6 states have internal predecessors, (18), 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) [2023-11-23 21:09:21,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:09:21,593 INFO L93 Difference]: Finished difference Result 131 states and 167 transitions. [2023-11-23 21:09:21,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-23 21:09:21,594 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 3.6) internal successors, (18), 6 states have internal predecessors, (18), 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 11 [2023-11-23 21:09:21,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:09:21,597 INFO L225 Difference]: With dead ends: 131 [2023-11-23 21:09:21,598 INFO L226 Difference]: Without dead ends: 129 [2023-11-23 21:09:21,598 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2023-11-23 21:09:21,603 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 67 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 61 SdHoareTripleChecker+Invalid, 53 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-23 21:09:21,603 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [67 Valid, 61 Invalid, 53 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-23 21:09:21,607 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2023-11-23 21:09:21,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 64. [2023-11-23 21:09:21,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 57 states have (on average 1.3859649122807018) internal successors, (79), 62 states have internal predecessors, (79), 2 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:09:21,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 81 transitions. [2023-11-23 21:09:21,635 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 81 transitions. Word has length 11 [2023-11-23 21:09:21,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:09:21,636 INFO L495 AbstractCegarLoop]: Abstraction has 64 states and 81 transitions. [2023-11-23 21:09:21,636 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 3.6) internal successors, (18), 6 states have internal predecessors, (18), 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) [2023-11-23 21:09:21,636 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 81 transitions. [2023-11-23 21:09:21,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2023-11-23 21:09:21,637 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:09:21,637 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:09:21,664 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4431346-91ef-48a5-8c95-5e94ca4d268a/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-23 21:09:21,838 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4431346-91ef-48a5-8c95-5e94ca4d268a/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2023-11-23 21:09:21,838 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting fErr7ASSERT_VIOLATIONINTEGER_OVERFLOW === [fErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr3ASSERT_VIOLATIONINTEGER_OVERFLOW (and 4 more)] === [2023-11-23 21:09:21,839 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:09:21,839 INFO L85 PathProgramCache]: Analyzing trace with hash 643867095, now seen corresponding path program 1 times [2023-11-23 21:09:21,839 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:09:21,839 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [118019680] [2023-11-23 21:09:21,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:09:21,839 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:09:21,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:09:21,904 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 21:09:21,905 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:09:21,905 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [118019680] [2023-11-23 21:09:21,905 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [118019680] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 21:09:21,905 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1776004398] [2023-11-23 21:09:21,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:09:21,905 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:09:21,906 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4431346-91ef-48a5-8c95-5e94ca4d268a/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 21:09:21,907 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4431346-91ef-48a5-8c95-5e94ca4d268a/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 21:09:21,909 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4431346-91ef-48a5-8c95-5e94ca4d268a/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-23 21:09:21,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:09:21,943 INFO L262 TraceCheckSpWp]: Trace formula consists of 39 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-23 21:09:21,944 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 21:09:22,006 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 21:09:22,006 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 21:09:22,006 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1776004398] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:09:22,006 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-23 21:09:22,007 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2023-11-23 21:09:22,007 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1472077] [2023-11-23 21:09:22,007 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:09:22,007 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-23 21:09:22,008 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:09:22,008 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-23 21:09:22,008 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2023-11-23 21:09:22,009 INFO L87 Difference]: Start difference. First operand 64 states and 81 transitions. Second operand has 5 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 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) [2023-11-23 21:09:22,067 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:09:22,068 INFO L93 Difference]: Finished difference Result 81 states and 103 transitions. [2023-11-23 21:09:22,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-23 21:09:22,068 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 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 14 [2023-11-23 21:09:22,069 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:09:22,069 INFO L225 Difference]: With dead ends: 81 [2023-11-23 21:09:22,069 INFO L226 Difference]: Without dead ends: 80 [2023-11-23 21:09:22,070 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2023-11-23 21:09:22,071 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 33 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-23 21:09:22,071 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [33 Valid, 38 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-23 21:09:22,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2023-11-23 21:09:22,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 55. [2023-11-23 21:09:22,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 49 states have (on average 1.3265306122448979) internal successors, (65), 53 states have internal predecessors, (65), 2 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:09:22,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 67 transitions. [2023-11-23 21:09:22,084 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 67 transitions. Word has length 14 [2023-11-23 21:09:22,084 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:09:22,084 INFO L495 AbstractCegarLoop]: Abstraction has 55 states and 67 transitions. [2023-11-23 21:09:22,084 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 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) [2023-11-23 21:09:22,085 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 67 transitions. [2023-11-23 21:09:22,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2023-11-23 21:09:22,086 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:09:22,086 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:09:22,114 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4431346-91ef-48a5-8c95-5e94ca4d268a/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-11-23 21:09:22,309 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4431346-91ef-48a5-8c95-5e94ca4d268a/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:09:22,310 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting fErr3ASSERT_VIOLATIONINTEGER_OVERFLOW === [fErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr3ASSERT_VIOLATIONINTEGER_OVERFLOW (and 4 more)] === [2023-11-23 21:09:22,310 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:09:22,311 INFO L85 PathProgramCache]: Analyzing trace with hash -1561230653, now seen corresponding path program 1 times [2023-11-23 21:09:22,311 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:09:22,311 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1175103061] [2023-11-23 21:09:22,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:09:22,311 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:09:22,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:09:22,373 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 21:09:22,373 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:09:22,373 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1175103061] [2023-11-23 21:09:22,374 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1175103061] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 21:09:22,374 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1087674099] [2023-11-23 21:09:22,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:09:22,374 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:09:22,375 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4431346-91ef-48a5-8c95-5e94ca4d268a/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 21:09:22,376 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4431346-91ef-48a5-8c95-5e94ca4d268a/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 21:09:22,405 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4431346-91ef-48a5-8c95-5e94ca4d268a/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-23 21:09:22,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:09:22,432 INFO L262 TraceCheckSpWp]: Trace formula consists of 43 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-23 21:09:22,433 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 21:09:22,516 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 21:09:22,516 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 21:09:22,517 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1087674099] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:09:22,517 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-23 21:09:22,517 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2023-11-23 21:09:22,517 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1054075842] [2023-11-23 21:09:22,518 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:09:22,518 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-23 21:09:22,518 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:09:22,519 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-23 21:09:22,519 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2023-11-23 21:09:22,519 INFO L87 Difference]: Start difference. First operand 55 states and 67 transitions. Second operand has 5 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 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) [2023-11-23 21:09:22,561 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:09:22,561 INFO L93 Difference]: Finished difference Result 55 states and 67 transitions. [2023-11-23 21:09:22,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-23 21:09:22,562 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 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 16 [2023-11-23 21:09:22,562 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:09:22,563 INFO L225 Difference]: With dead ends: 55 [2023-11-23 21:09:22,563 INFO L226 Difference]: Without dead ends: 54 [2023-11-23 21:09:22,563 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2023-11-23 21:09:22,564 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 30 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-23 21:09:22,565 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [30 Valid, 34 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-23 21:09:22,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2023-11-23 21:09:22,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2023-11-23 21:09:22,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 49 states have (on average 1.2857142857142858) internal successors, (63), 52 states have internal predecessors, (63), 2 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:09:22,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 65 transitions. [2023-11-23 21:09:22,575 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 65 transitions. Word has length 16 [2023-11-23 21:09:22,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:09:22,575 INFO L495 AbstractCegarLoop]: Abstraction has 54 states and 65 transitions. [2023-11-23 21:09:22,575 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 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) [2023-11-23 21:09:22,575 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 65 transitions. [2023-11-23 21:09:22,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2023-11-23 21:09:22,576 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:09:22,577 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:09:22,597 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4431346-91ef-48a5-8c95-5e94ca4d268a/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-23 21:09:22,793 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4431346-91ef-48a5-8c95-5e94ca4d268a/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:09:22,794 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting fErr4ASSERT_VIOLATIONINTEGER_OVERFLOW === [fErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr3ASSERT_VIOLATIONINTEGER_OVERFLOW (and 4 more)] === [2023-11-23 21:09:22,794 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:09:22,794 INFO L85 PathProgramCache]: Analyzing trace with hash -1153509919, now seen corresponding path program 1 times [2023-11-23 21:09:22,794 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:09:22,794 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [66713043] [2023-11-23 21:09:22,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:09:22,795 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:09:22,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:09:22,838 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 21:09:22,838 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:09:22,839 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [66713043] [2023-11-23 21:09:22,839 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [66713043] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 21:09:22,839 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1577778834] [2023-11-23 21:09:22,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:09:22,839 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:09:22,839 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4431346-91ef-48a5-8c95-5e94ca4d268a/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 21:09:22,840 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4431346-91ef-48a5-8c95-5e94ca4d268a/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 21:09:22,857 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4431346-91ef-48a5-8c95-5e94ca4d268a/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-23 21:09:22,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:09:22,880 INFO L262 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-23 21:09:22,881 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 21:09:22,899 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 21:09:22,900 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 21:09:22,931 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 21:09:22,931 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1577778834] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 21:09:22,932 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [452992551] [2023-11-23 21:09:22,934 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2023-11-23 21:09:22,934 INFO L166 IcfgInterpreter]: Building call graph [2023-11-23 21:09:22,935 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-23 21:09:22,935 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-23 21:09:22,935 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-23 21:09:22,945 INFO L197 IcfgInterpreter]: Interpreting procedure f with input of size 15 for LOIs [2023-11-23 21:09:23,383 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-23 21:09:23,929 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2189#(and (<= f_~k~0 1) (<= f_~x~0 2147483646) (<= 0 (+ f_~k~0 2147483648)) (= |f_#in~d| 1) (<= (+ f_~z~0 2147483648) 0) (= f_~d 1) (<= 0 f_~x~0) (<= f_~y~0 2147483647) (<= 0 (+ f_~y~0 2147483648)))' at error location [2023-11-23 21:09:23,929 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-23 21:09:23,929 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-23 21:09:23,929 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 5 [2023-11-23 21:09:23,930 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [623606475] [2023-11-23 21:09:23,930 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-23 21:09:23,930 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-23 21:09:23,930 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:09:23,931 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-23 21:09:23,931 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=182, Unknown=0, NotChecked=0, Total=240 [2023-11-23 21:09:23,931 INFO L87 Difference]: Start difference. First operand 54 states and 65 transitions. Second operand has 6 states, 5 states have (on average 6.0) internal successors, (30), 6 states have internal predecessors, (30), 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) [2023-11-23 21:09:23,974 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:09:23,974 INFO L93 Difference]: Finished difference Result 103 states and 128 transitions. [2023-11-23 21:09:23,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-23 21:09:23,975 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 6.0) internal successors, (30), 6 states have internal predecessors, (30), 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 17 [2023-11-23 21:09:23,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:09:23,976 INFO L225 Difference]: With dead ends: 103 [2023-11-23 21:09:23,976 INFO L226 Difference]: Without dead ends: 102 [2023-11-23 21:09:23,977 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=58, Invalid=182, Unknown=0, NotChecked=0, Total=240 [2023-11-23 21:09:23,977 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 21 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-23 21:09:23,978 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 54 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-23 21:09:23,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2023-11-23 21:09:23,990 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 102. [2023-11-23 21:09:23,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 97 states have (on average 1.2371134020618557) internal successors, (120), 100 states have internal predecessors, (120), 2 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:09:23,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 122 transitions. [2023-11-23 21:09:23,991 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 122 transitions. Word has length 17 [2023-11-23 21:09:23,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:09:23,992 INFO L495 AbstractCegarLoop]: Abstraction has 102 states and 122 transitions. [2023-11-23 21:09:23,992 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 6.0) internal successors, (30), 6 states have internal predecessors, (30), 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) [2023-11-23 21:09:23,992 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 122 transitions. [2023-11-23 21:09:23,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2023-11-23 21:09:23,996 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:09:23,996 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 1, 1, 1, 1, 1, 1] [2023-11-23 21:09:24,023 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4431346-91ef-48a5-8c95-5e94ca4d268a/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-23 21:09:24,217 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4431346-91ef-48a5-8c95-5e94ca4d268a/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:09:24,218 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting fErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [fErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr3ASSERT_VIOLATIONINTEGER_OVERFLOW (and 4 more)] === [2023-11-23 21:09:24,218 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:09:24,218 INFO L85 PathProgramCache]: Analyzing trace with hash -425989666, now seen corresponding path program 2 times [2023-11-23 21:09:24,218 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:09:24,219 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1431494191] [2023-11-23 21:09:24,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:09:24,219 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:09:24,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:09:24,251 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2023-11-23 21:09:24,252 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:09:24,252 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1431494191] [2023-11-23 21:09:24,252 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1431494191] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 21:09:24,252 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [122704270] [2023-11-23 21:09:24,252 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-23 21:09:24,252 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:09:24,252 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4431346-91ef-48a5-8c95-5e94ca4d268a/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 21:09:24,260 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4431346-91ef-48a5-8c95-5e94ca4d268a/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 21:09:24,265 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4431346-91ef-48a5-8c95-5e94ca4d268a/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-23 21:09:24,300 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2023-11-23 21:09:24,300 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-23 21:09:24,301 INFO L262 TraceCheckSpWp]: Trace formula consists of 23 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-23 21:09:24,302 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 21:09:24,326 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2023-11-23 21:09:24,326 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 21:09:24,359 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2023-11-23 21:09:24,359 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [122704270] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 21:09:24,360 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1438177982] [2023-11-23 21:09:24,362 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2023-11-23 21:09:24,362 INFO L166 IcfgInterpreter]: Building call graph [2023-11-23 21:09:24,362 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-23 21:09:24,362 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-23 21:09:24,363 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-23 21:09:24,370 INFO L197 IcfgInterpreter]: Interpreting procedure f with input of size 15 for LOIs [2023-11-23 21:09:24,539 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-23 21:09:24,833 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2560#(and (= |f_#in~d| 1) (= f_~d 1) (<= 2 f_~k~0) (<= 1073741824 f_~z~0) (<= f_~x~0 2147483647) (<= f_~k~0 1073741823) (<= f_~y~0 2147483647) (<= 0 (+ f_~y~0 2147483648)) (<= 0 (+ f_~x~0 2147483648)))' at error location [2023-11-23 21:09:24,834 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-23 21:09:24,834 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-23 21:09:24,834 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 5 [2023-11-23 21:09:24,834 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1764215682] [2023-11-23 21:09:24,834 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-23 21:09:24,834 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-23 21:09:24,835 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:09:24,835 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-23 21:09:24,835 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2023-11-23 21:09:24,835 INFO L87 Difference]: Start difference. First operand 102 states and 122 transitions. Second operand has 6 states, 5 states have (on average 3.4) internal successors, (17), 6 states have internal predecessors, (17), 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) [2023-11-23 21:09:24,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:09:24,881 INFO L93 Difference]: Finished difference Result 141 states and 167 transitions. [2023-11-23 21:09:24,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-23 21:09:24,882 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 3.4) internal successors, (17), 6 states have internal predecessors, (17), 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 20 [2023-11-23 21:09:24,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:09:24,883 INFO L225 Difference]: With dead ends: 141 [2023-11-23 21:09:24,883 INFO L226 Difference]: Without dead ends: 140 [2023-11-23 21:09:24,884 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 49 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=49, Invalid=133, Unknown=0, NotChecked=0, Total=182 [2023-11-23 21:09:24,885 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 45 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-23 21:09:24,885 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [45 Valid, 33 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-23 21:09:24,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2023-11-23 21:09:24,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 99. [2023-11-23 21:09:24,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 95 states have (on average 1.231578947368421) internal successors, (117), 97 states have internal predecessors, (117), 2 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:09:24,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 119 transitions. [2023-11-23 21:09:24,899 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 119 transitions. Word has length 20 [2023-11-23 21:09:24,899 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:09:24,899 INFO L495 AbstractCegarLoop]: Abstraction has 99 states and 119 transitions. [2023-11-23 21:09:24,900 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 3.4) internal successors, (17), 6 states have internal predecessors, (17), 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) [2023-11-23 21:09:24,900 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 119 transitions. [2023-11-23 21:09:24,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2023-11-23 21:09:24,901 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:09:24,901 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:09:24,930 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4431346-91ef-48a5-8c95-5e94ca4d268a/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-23 21:09:25,125 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4431346-91ef-48a5-8c95-5e94ca4d268a/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-11-23 21:09:25,126 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting fErr5ASSERT_VIOLATIONINTEGER_OVERFLOW === [fErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr3ASSERT_VIOLATIONINTEGER_OVERFLOW (and 4 more)] === [2023-11-23 21:09:25,126 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:09:25,126 INFO L85 PathProgramCache]: Analyzing trace with hash 1222235134, now seen corresponding path program 1 times [2023-11-23 21:09:25,126 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:09:25,126 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1040627623] [2023-11-23 21:09:25,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:09:25,127 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:09:25,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:09:25,178 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-11-23 21:09:25,178 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:09:25,178 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1040627623] [2023-11-23 21:09:25,179 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1040627623] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:09:25,179 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:09:25,179 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-23 21:09:25,179 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1539949589] [2023-11-23 21:09:25,179 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:09:25,181 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 21:09:25,181 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:09:25,181 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 21:09:25,181 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 21:09:25,182 INFO L87 Difference]: Start difference. First operand 99 states and 119 transitions. Second operand has 3 states, 2 states have (on average 7.5) internal successors, (15), 3 states have internal predecessors, (15), 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) [2023-11-23 21:09:25,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:09:25,208 INFO L93 Difference]: Finished difference Result 99 states and 119 transitions. [2023-11-23 21:09:25,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 21:09:25,208 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 7.5) internal successors, (15), 3 states have internal predecessors, (15), 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 24 [2023-11-23 21:09:25,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:09:25,209 INFO L225 Difference]: With dead ends: 99 [2023-11-23 21:09:25,210 INFO L226 Difference]: Without dead ends: 98 [2023-11-23 21:09:25,210 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 [2023-11-23 21:09:25,211 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 7 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-23 21:09:25,211 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 17 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-23 21:09:25,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2023-11-23 21:09:25,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 49. [2023-11-23 21:09:25,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 46 states have (on average 1.173913043478261) internal successors, (54), 47 states have internal predecessors, (54), 2 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:09:25,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 56 transitions. [2023-11-23 21:09:25,219 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 56 transitions. Word has length 24 [2023-11-23 21:09:25,220 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:09:25,220 INFO L495 AbstractCegarLoop]: Abstraction has 49 states and 56 transitions. [2023-11-23 21:09:25,220 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 7.5) internal successors, (15), 3 states have internal predecessors, (15), 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) [2023-11-23 21:09:25,220 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 56 transitions. [2023-11-23 21:09:25,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2023-11-23 21:09:25,222 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:09:25,222 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:09:25,223 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-11-23 21:09:25,223 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting fErr4ASSERT_VIOLATIONINTEGER_OVERFLOW === [fErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr3ASSERT_VIOLATIONINTEGER_OVERFLOW (and 4 more)] === [2023-11-23 21:09:25,223 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:09:25,223 INFO L85 PathProgramCache]: Analyzing trace with hash 1841414380, now seen corresponding path program 2 times [2023-11-23 21:09:25,224 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:09:25,224 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [951289483] [2023-11-23 21:09:25,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:09:25,224 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:09:25,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:09:25,349 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 21:09:25,349 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:09:25,349 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [951289483] [2023-11-23 21:09:25,349 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [951289483] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 21:09:25,350 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1968340040] [2023-11-23 21:09:25,350 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-23 21:09:25,350 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:09:25,350 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4431346-91ef-48a5-8c95-5e94ca4d268a/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 21:09:25,354 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4431346-91ef-48a5-8c95-5e94ca4d268a/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 21:09:25,355 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4431346-91ef-48a5-8c95-5e94ca4d268a/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-23 21:09:25,408 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2023-11-23 21:09:25,408 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-23 21:09:25,409 INFO L262 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-23 21:09:25,411 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 21:09:25,464 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 21:09:25,464 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 21:09:25,567 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 21:09:25,567 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1968340040] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 21:09:25,567 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1646477235] [2023-11-23 21:09:25,569 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2023-11-23 21:09:25,570 INFO L166 IcfgInterpreter]: Building call graph [2023-11-23 21:09:25,570 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-23 21:09:25,570 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-23 21:09:25,571 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-23 21:09:25,577 INFO L197 IcfgInterpreter]: Interpreting procedure f with input of size 15 for LOIs [2023-11-23 21:09:25,854 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-23 21:09:26,389 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3244#(and (<= f_~k~0 1) (<= f_~x~0 2147483646) (<= 0 (+ f_~k~0 2147483648)) (= |f_#in~d| 1) (<= (+ f_~z~0 2147483648) 0) (= f_~d 1) (<= 0 f_~x~0) (<= f_~y~0 2147483647) (<= 0 (+ f_~y~0 2147483648)))' at error location [2023-11-23 21:09:26,389 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-23 21:09:26,389 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-23 21:09:26,390 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 11 [2023-11-23 21:09:26,390 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [712286002] [2023-11-23 21:09:26,390 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-23 21:09:26,390 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-23 21:09:26,390 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:09:26,391 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-23 21:09:26,391 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=341, Unknown=0, NotChecked=0, Total=462 [2023-11-23 21:09:26,391 INFO L87 Difference]: Start difference. First operand 49 states and 56 transitions. Second operand has 12 states, 11 states have (on average 6.0) internal successors, (66), 12 states have internal predecessors, (66), 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) [2023-11-23 21:09:26,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:09:26,447 INFO L93 Difference]: Finished difference Result 98 states and 116 transitions. [2023-11-23 21:09:26,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-23 21:09:26,448 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 6.0) internal successors, (66), 12 states have internal predecessors, (66), 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 35 [2023-11-23 21:09:26,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:09:26,449 INFO L225 Difference]: With dead ends: 98 [2023-11-23 21:09:26,449 INFO L226 Difference]: Without dead ends: 97 [2023-11-23 21:09:26,450 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 88 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 160 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=121, Invalid=341, Unknown=0, NotChecked=0, Total=462 [2023-11-23 21:09:26,451 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 89 mSDsluCounter, 74 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 89 SdHoareTripleChecker+Valid, 88 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-23 21:09:26,451 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [89 Valid, 88 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-23 21:09:26,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2023-11-23 21:09:26,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 97. [2023-11-23 21:09:26,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 94 states have (on average 1.148936170212766) internal successors, (108), 95 states have internal predecessors, (108), 2 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:09:26,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 110 transitions. [2023-11-23 21:09:26,463 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 110 transitions. Word has length 35 [2023-11-23 21:09:26,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:09:26,463 INFO L495 AbstractCegarLoop]: Abstraction has 97 states and 110 transitions. [2023-11-23 21:09:26,464 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 6.0) internal successors, (66), 12 states have internal predecessors, (66), 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) [2023-11-23 21:09:26,464 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 110 transitions. [2023-11-23 21:09:26,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2023-11-23 21:09:26,466 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:09:26,466 INFO L195 NwaCegarLoop]: trace histogram [11, 11, 11, 11, 10, 10, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:09:26,491 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4431346-91ef-48a5-8c95-5e94ca4d268a/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-23 21:09:26,686 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4431346-91ef-48a5-8c95-5e94ca4d268a/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-11-23 21:09:26,687 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting fErr4ASSERT_VIOLATIONINTEGER_OVERFLOW === [fErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr3ASSERT_VIOLATIONINTEGER_OVERFLOW (and 4 more)] === [2023-11-23 21:09:26,687 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:09:26,687 INFO L85 PathProgramCache]: Analyzing trace with hash -2102288190, now seen corresponding path program 3 times [2023-11-23 21:09:26,688 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:09:26,688 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [778274042] [2023-11-23 21:09:26,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:09:26,688 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:09:26,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:09:27,047 INFO L134 CoverageAnalysis]: Checked inductivity of 320 backedges. 0 proven. 320 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 21:09:27,047 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:09:27,048 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [778274042] [2023-11-23 21:09:27,048 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [778274042] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 21:09:27,048 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2137323200] [2023-11-23 21:09:27,048 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-23 21:09:27,048 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:09:27,048 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4431346-91ef-48a5-8c95-5e94ca4d268a/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 21:09:27,049 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4431346-91ef-48a5-8c95-5e94ca4d268a/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 21:09:27,065 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4431346-91ef-48a5-8c95-5e94ca4d268a/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-23 21:09:27,111 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-23 21:09:27,111 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-23 21:09:27,112 INFO L262 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-23 21:09:27,117 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 21:09:27,218 INFO L134 CoverageAnalysis]: Checked inductivity of 320 backedges. 0 proven. 320 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 21:09:27,218 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 21:09:27,523 INFO L134 CoverageAnalysis]: Checked inductivity of 320 backedges. 0 proven. 320 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 21:09:27,524 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2137323200] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 21:09:27,524 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [748650954] [2023-11-23 21:09:27,526 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2023-11-23 21:09:27,526 INFO L166 IcfgInterpreter]: Building call graph [2023-11-23 21:09:27,527 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-23 21:09:27,527 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-23 21:09:27,527 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-23 21:09:27,533 INFO L197 IcfgInterpreter]: Interpreting procedure f with input of size 15 for LOIs [2023-11-23 21:09:27,804 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-23 21:09:28,355 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3923#(and (<= f_~k~0 1) (<= f_~x~0 2147483646) (<= 0 (+ f_~k~0 2147483648)) (= |f_#in~d| 1) (<= (+ f_~z~0 2147483648) 0) (= f_~d 1) (<= 0 f_~x~0) (<= f_~y~0 2147483647) (<= 0 (+ f_~y~0 2147483648)))' at error location [2023-11-23 21:09:28,355 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-23 21:09:28,355 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-23 21:09:28,356 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 23 [2023-11-23 21:09:28,356 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2016660254] [2023-11-23 21:09:28,356 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-23 21:09:28,357 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-11-23 21:09:28,357 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:09:28,358 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-11-23 21:09:28,358 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=355, Invalid=767, Unknown=0, NotChecked=0, Total=1122 [2023-11-23 21:09:28,359 INFO L87 Difference]: Start difference. First operand 97 states and 110 transitions. Second operand has 24 states, 23 states have (on average 6.0) internal successors, (138), 24 states have internal predecessors, (138), 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) [2023-11-23 21:09:28,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:09:28,487 INFO L93 Difference]: Finished difference Result 194 states and 230 transitions. [2023-11-23 21:09:28,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-11-23 21:09:28,488 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 6.0) internal successors, (138), 24 states have internal predecessors, (138), 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 71 [2023-11-23 21:09:28,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:09:28,489 INFO L225 Difference]: With dead ends: 194 [2023-11-23 21:09:28,490 INFO L226 Difference]: Without dead ends: 193 [2023-11-23 21:09:28,491 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 223 GetRequests, 190 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 352 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=355, Invalid=767, Unknown=0, NotChecked=0, Total=1122 [2023-11-23 21:09:28,491 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 194 mSDsluCounter, 170 mSDsCounter, 0 mSdLazyCounter, 58 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 194 SdHoareTripleChecker+Valid, 184 SdHoareTripleChecker+Invalid, 63 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 58 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-23 21:09:28,492 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [194 Valid, 184 Invalid, 63 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 58 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-23 21:09:28,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2023-11-23 21:09:28,512 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 193. [2023-11-23 21:09:28,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 193 states, 190 states have (on average 1.1368421052631579) internal successors, (216), 191 states have internal predecessors, (216), 2 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:09:28,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 218 transitions. [2023-11-23 21:09:28,514 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 218 transitions. Word has length 71 [2023-11-23 21:09:28,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:09:28,515 INFO L495 AbstractCegarLoop]: Abstraction has 193 states and 218 transitions. [2023-11-23 21:09:28,515 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 6.0) internal successors, (138), 24 states have internal predecessors, (138), 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) [2023-11-23 21:09:28,515 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 218 transitions. [2023-11-23 21:09:28,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2023-11-23 21:09:28,517 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:09:28,517 INFO L195 NwaCegarLoop]: trace histogram [23, 23, 23, 23, 22, 22, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:09:28,553 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4431346-91ef-48a5-8c95-5e94ca4d268a/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-11-23 21:09:28,732 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4431346-91ef-48a5-8c95-5e94ca4d268a/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-11-23 21:09:28,733 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting fErr4ASSERT_VIOLATIONINTEGER_OVERFLOW === [fErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr3ASSERT_VIOLATIONINTEGER_OVERFLOW (and 4 more)] === [2023-11-23 21:09:28,733 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:09:28,734 INFO L85 PathProgramCache]: Analyzing trace with hash 734316398, now seen corresponding path program 4 times [2023-11-23 21:09:28,734 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:09:28,734 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1552050013] [2023-11-23 21:09:28,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:09:28,734 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:09:28,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:09:29,623 INFO L134 CoverageAnalysis]: Checked inductivity of 1496 backedges. 0 proven. 1496 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 21:09:29,623 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:09:29,624 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1552050013] [2023-11-23 21:09:29,624 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1552050013] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 21:09:29,624 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1615049609] [2023-11-23 21:09:29,624 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-23 21:09:29,624 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:09:29,625 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4431346-91ef-48a5-8c95-5e94ca4d268a/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 21:09:29,626 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4431346-91ef-48a5-8c95-5e94ca4d268a/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 21:09:29,649 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4431346-91ef-48a5-8c95-5e94ca4d268a/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-23 21:09:29,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:09:29,732 INFO L262 TraceCheckSpWp]: Trace formula consists of 363 conjuncts, 24 conjunts are in the unsatisfiable core [2023-11-23 21:09:29,744 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 21:09:29,935 INFO L134 CoverageAnalysis]: Checked inductivity of 1496 backedges. 0 proven. 1496 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 21:09:29,935 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 21:09:31,002 INFO L134 CoverageAnalysis]: Checked inductivity of 1496 backedges. 0 proven. 1496 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 21:09:31,003 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1615049609] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 21:09:31,003 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1381843740] [2023-11-23 21:09:31,005 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2023-11-23 21:09:31,005 INFO L166 IcfgInterpreter]: Building call graph [2023-11-23 21:09:31,006 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-23 21:09:31,006 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-23 21:09:31,006 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-23 21:09:31,012 INFO L197 IcfgInterpreter]: Interpreting procedure f with input of size 15 for LOIs [2023-11-23 21:09:31,306 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-23 21:09:31,919 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '5274#(and (<= f_~k~0 1) (<= f_~x~0 2147483646) (<= 0 (+ f_~k~0 2147483648)) (= |f_#in~d| 1) (<= (+ f_~z~0 2147483648) 0) (= f_~d 1) (<= 0 f_~x~0) (<= f_~y~0 2147483647) (<= 0 (+ f_~y~0 2147483648)))' at error location [2023-11-23 21:09:31,919 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-23 21:09:31,919 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-23 21:09:31,919 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24, 24] total 47 [2023-11-23 21:09:31,919 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [584526681] [2023-11-23 21:09:31,919 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-23 21:09:31,920 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2023-11-23 21:09:31,921 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:09:31,922 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2023-11-23 21:09:31,924 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1255, Invalid=2051, Unknown=0, NotChecked=0, Total=3306 [2023-11-23 21:09:31,925 INFO L87 Difference]: Start difference. First operand 193 states and 218 transitions. Second operand has 48 states, 47 states have (on average 6.0) internal successors, (282), 48 states have internal predecessors, (282), 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) [2023-11-23 21:09:32,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:09:32,314 INFO L93 Difference]: Finished difference Result 386 states and 458 transitions. [2023-11-23 21:09:32,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2023-11-23 21:09:32,315 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 47 states have (on average 6.0) internal successors, (282), 48 states have internal predecessors, (282), 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 143 [2023-11-23 21:09:32,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:09:32,318 INFO L225 Difference]: With dead ends: 386 [2023-11-23 21:09:32,318 INFO L226 Difference]: Without dead ends: 385 [2023-11-23 21:09:32,320 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 451 GetRequests, 394 SyntacticMatches, 1 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 736 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=1255, Invalid=2051, Unknown=0, NotChecked=0, Total=3306 [2023-11-23 21:09:32,321 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 504 mSDsluCounter, 334 mSDsCounter, 0 mSdLazyCounter, 104 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 504 SdHoareTripleChecker+Valid, 348 SdHoareTripleChecker+Invalid, 111 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 104 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-23 21:09:32,322 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [504 Valid, 348 Invalid, 111 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 104 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-23 21:09:32,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 385 states. [2023-11-23 21:09:32,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 385 to 385. [2023-11-23 21:09:32,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 385 states, 382 states have (on average 1.130890052356021) internal successors, (432), 383 states have internal predecessors, (432), 2 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:09:32,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 385 states to 385 states and 434 transitions. [2023-11-23 21:09:32,354 INFO L78 Accepts]: Start accepts. Automaton has 385 states and 434 transitions. Word has length 143 [2023-11-23 21:09:32,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:09:32,355 INFO L495 AbstractCegarLoop]: Abstraction has 385 states and 434 transitions. [2023-11-23 21:09:32,355 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 47 states have (on average 6.0) internal successors, (282), 48 states have internal predecessors, (282), 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) [2023-11-23 21:09:32,355 INFO L276 IsEmpty]: Start isEmpty. Operand 385 states and 434 transitions. [2023-11-23 21:09:32,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 288 [2023-11-23 21:09:32,360 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:09:32,360 INFO L195 NwaCegarLoop]: trace histogram [47, 47, 47, 47, 46, 46, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:09:32,387 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4431346-91ef-48a5-8c95-5e94ca4d268a/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-11-23 21:09:32,573 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4431346-91ef-48a5-8c95-5e94ca4d268a/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-11-23 21:09:32,574 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting fErr4ASSERT_VIOLATIONINTEGER_OVERFLOW === [fErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr3ASSERT_VIOLATIONINTEGER_OVERFLOW (and 4 more)] === [2023-11-23 21:09:32,574 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:09:32,574 INFO L85 PathProgramCache]: Analyzing trace with hash -1213026106, now seen corresponding path program 5 times [2023-11-23 21:09:32,574 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:09:32,575 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [107899067] [2023-11-23 21:09:32,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:09:32,575 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:09:32,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:09:35,577 INFO L134 CoverageAnalysis]: Checked inductivity of 6440 backedges. 0 proven. 6440 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 21:09:35,578 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:09:35,578 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [107899067] [2023-11-23 21:09:35,578 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [107899067] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 21:09:35,578 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1029251663] [2023-11-23 21:09:35,578 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-23 21:09:35,578 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:09:35,579 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4431346-91ef-48a5-8c95-5e94ca4d268a/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 21:09:35,580 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4431346-91ef-48a5-8c95-5e94ca4d268a/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 21:09:35,591 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4431346-91ef-48a5-8c95-5e94ca4d268a/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-23 21:09:35,810 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 47 check-sat command(s) [2023-11-23 21:09:35,810 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-23 21:09:35,814 INFO L262 TraceCheckSpWp]: Trace formula consists of 723 conjuncts, 48 conjunts are in the unsatisfiable core [2023-11-23 21:09:35,822 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 21:09:36,303 INFO L134 CoverageAnalysis]: Checked inductivity of 6440 backedges. 0 proven. 6440 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 21:09:36,304 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 21:09:39,829 INFO L134 CoverageAnalysis]: Checked inductivity of 6440 backedges. 0 proven. 6440 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 21:09:39,829 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1029251663] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 21:09:39,829 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [419249271] [2023-11-23 21:09:39,831 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2023-11-23 21:09:39,832 INFO L166 IcfgInterpreter]: Building call graph [2023-11-23 21:09:39,832 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-23 21:09:39,832 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-23 21:09:39,833 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-23 21:09:39,844 INFO L197 IcfgInterpreter]: Interpreting procedure f with input of size 15 for LOIs [2023-11-23 21:09:40,094 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-23 21:09:40,913 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '7969#(and (<= f_~k~0 1) (<= f_~x~0 2147483646) (<= 0 (+ f_~k~0 2147483648)) (= |f_#in~d| 1) (<= (+ f_~z~0 2147483648) 0) (= f_~d 1) (<= 0 f_~x~0) (<= f_~y~0 2147483647) (<= 0 (+ f_~y~0 2147483648)))' at error location [2023-11-23 21:09:40,914 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-23 21:09:40,914 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-23 21:09:40,914 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 48, 48] total 95 [2023-11-23 21:09:40,914 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [112845522] [2023-11-23 21:09:40,914 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-23 21:09:40,916 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 96 states [2023-11-23 21:09:40,916 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:09:40,918 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 96 interpolants. [2023-11-23 21:09:40,922 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4783, Invalid=6347, Unknown=0, NotChecked=0, Total=11130 [2023-11-23 21:09:40,923 INFO L87 Difference]: Start difference. First operand 385 states and 434 transitions. Second operand has 96 states, 95 states have (on average 6.0) internal successors, (570), 96 states have internal predecessors, (570), 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) [2023-11-23 21:09:42,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:09:42,512 INFO L93 Difference]: Finished difference Result 770 states and 914 transitions. [2023-11-23 21:09:42,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2023-11-23 21:09:42,513 INFO L78 Accepts]: Start accepts. Automaton has has 96 states, 95 states have (on average 6.0) internal successors, (570), 96 states have internal predecessors, (570), 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 287 [2023-11-23 21:09:42,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:09:42,518 INFO L225 Difference]: With dead ends: 770 [2023-11-23 21:09:42,518 INFO L226 Difference]: Without dead ends: 769 [2023-11-23 21:09:42,525 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 907 GetRequests, 802 SyntacticMatches, 1 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1504 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=4783, Invalid=6347, Unknown=0, NotChecked=0, Total=11130 [2023-11-23 21:09:42,526 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 1140 mSDsluCounter, 678 mSDsCounter, 0 mSdLazyCounter, 204 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1140 SdHoareTripleChecker+Valid, 692 SdHoareTripleChecker+Invalid, 211 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 204 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-23 21:09:42,526 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1140 Valid, 692 Invalid, 211 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 204 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-23 21:09:42,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 769 states. [2023-11-23 21:09:42,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 769 to 769. [2023-11-23 21:09:42,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 769 states, 766 states have (on average 1.1279373368146215) internal successors, (864), 767 states have internal predecessors, (864), 2 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:09:42,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 769 states to 769 states and 866 transitions. [2023-11-23 21:09:42,605 INFO L78 Accepts]: Start accepts. Automaton has 769 states and 866 transitions. Word has length 287 [2023-11-23 21:09:42,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:09:42,605 INFO L495 AbstractCegarLoop]: Abstraction has 769 states and 866 transitions. [2023-11-23 21:09:42,609 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 96 states, 95 states have (on average 6.0) internal successors, (570), 96 states have internal predecessors, (570), 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) [2023-11-23 21:09:42,609 INFO L276 IsEmpty]: Start isEmpty. Operand 769 states and 866 transitions. [2023-11-23 21:09:42,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 576 [2023-11-23 21:09:42,621 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:09:42,622 INFO L195 NwaCegarLoop]: trace histogram [95, 95, 95, 95, 94, 94, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:09:42,644 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4431346-91ef-48a5-8c95-5e94ca4d268a/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-11-23 21:09:42,843 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4431346-91ef-48a5-8c95-5e94ca4d268a/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-11-23 21:09:42,844 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting fErr4ASSERT_VIOLATIONINTEGER_OVERFLOW === [fErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr3ASSERT_VIOLATIONINTEGER_OVERFLOW (and 4 more)] === [2023-11-23 21:09:42,844 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:09:42,844 INFO L85 PathProgramCache]: Analyzing trace with hash 679277430, now seen corresponding path program 6 times [2023-11-23 21:09:42,844 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:09:42,845 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [150375410] [2023-11-23 21:09:42,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:09:42,845 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:09:43,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:09:53,642 INFO L134 CoverageAnalysis]: Checked inductivity of 26696 backedges. 0 proven. 26696 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 21:09:53,642 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:09:53,642 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [150375410] [2023-11-23 21:09:53,642 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [150375410] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 21:09:53,642 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1723437296] [2023-11-23 21:09:53,643 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-23 21:09:53,643 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:09:53,643 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4431346-91ef-48a5-8c95-5e94ca4d268a/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 21:09:53,644 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4431346-91ef-48a5-8c95-5e94ca4d268a/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 21:09:53,645 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4431346-91ef-48a5-8c95-5e94ca4d268a/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-23 21:09:53,946 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-23 21:09:53,946 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-23 21:09:53,957 INFO L262 TraceCheckSpWp]: Trace formula consists of 1443 conjuncts, 96 conjunts are in the unsatisfiable core [2023-11-23 21:09:53,972 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 21:09:54,866 INFO L134 CoverageAnalysis]: Checked inductivity of 26696 backedges. 0 proven. 26696 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 21:09:54,867 INFO L327 TraceCheckSpWp]: Computing backward predicates...