./Ultimate.py --spec ../../sv-benchmarks/c/properties/no-overflow.prp --file ../../sv-benchmarks/c/bitvector/byte_add_1-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for overflows Using default analysis Version 0e0057cc Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31265b51-b089-49c9-bd8e-224a9d7df066/bin/utaipan-verify-SwPr7d2a91/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31265b51-b089-49c9-bd8e-224a9d7df066/bin/utaipan-verify-SwPr7d2a91/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31265b51-b089-49c9-bd8e-224a9d7df066/bin/utaipan-verify-SwPr7d2a91/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31265b51-b089-49c9-bd8e-224a9d7df066/bin/utaipan-verify-SwPr7d2a91/config/TaipanReach.xml -i ../../sv-benchmarks/c/bitvector/byte_add_1-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31265b51-b089-49c9-bd8e-224a9d7df066/bin/utaipan-verify-SwPr7d2a91/config/svcomp-Overflow-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31265b51-b089-49c9-bd8e-224a9d7df066/bin/utaipan-verify-SwPr7d2a91 --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! overflow) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash db53fe9124e215e75c7f288cadf12df33daef67c04c75ea6ca77bc804670a99c --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-24 23:51:33,957 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-24 23:51:34,038 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31265b51-b089-49c9-bd8e-224a9d7df066/bin/utaipan-verify-SwPr7d2a91/config/svcomp-Overflow-32bit-Taipan_Default.epf [2023-11-24 23:51:34,044 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-24 23:51:34,045 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-24 23:51:34,072 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-24 23:51:34,073 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-24 23:51:34,074 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-24 23:51:34,074 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-24 23:51:34,075 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-24 23:51:34,075 INFO L153 SettingsManager]: * User list type=DISABLED [2023-11-24 23:51:34,076 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-11-24 23:51:34,077 INFO L153 SettingsManager]: * Explicit value domain=true [2023-11-24 23:51:34,077 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-11-24 23:51:34,078 INFO L153 SettingsManager]: * Octagon Domain=false [2023-11-24 23:51:34,078 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-11-24 23:51:34,079 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-11-24 23:51:34,079 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-11-24 23:51:34,080 INFO L153 SettingsManager]: * Interval Domain=false [2023-11-24 23:51:34,081 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-11-24 23:51:34,081 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-11-24 23:51:34,082 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-11-24 23:51:34,083 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-24 23:51:34,084 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-24 23:51:34,084 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-24 23:51:34,085 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-24 23:51:34,085 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-24 23:51:34,086 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-24 23:51:34,086 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-24 23:51:34,087 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-24 23:51:34,087 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-24 23:51:34,088 INFO L153 SettingsManager]: * Check absence of signed integer overflows=true [2023-11-24 23:51:34,088 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-24 23:51:34,089 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-24 23:51:34,089 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-24 23:51:34,090 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-24 23:51:34,090 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-24 23:51:34,091 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-24 23:51:34,091 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-24 23:51:34,091 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-24 23:51:34,091 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-24 23:51:34,092 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-24 23:51:34,092 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-24 23:51:34,092 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-11-24 23:51:34,093 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-24 23:51:34,093 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-24 23:51:34,093 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-24 23:51:34,093 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-11-24 23:51:34,094 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-24 23:51:34,094 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_31265b51-b089-49c9-bd8e-224a9d7df066/bin/utaipan-verify-SwPr7d2a91/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31265b51-b089-49c9-bd8e-224a9d7df066/bin/utaipan-verify-SwPr7d2a91 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! overflow) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> db53fe9124e215e75c7f288cadf12df33daef67c04c75ea6ca77bc804670a99c [2023-11-24 23:51:34,329 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-24 23:51:34,363 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-24 23:51:34,366 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-24 23:51:34,367 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-24 23:51:34,369 INFO L274 PluginConnector]: CDTParser initialized [2023-11-24 23:51:34,370 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31265b51-b089-49c9-bd8e-224a9d7df066/bin/utaipan-verify-SwPr7d2a91/../../sv-benchmarks/c/bitvector/byte_add_1-2.i [2023-11-24 23:51:37,582 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-24 23:51:37,818 INFO L384 CDTParser]: Found 1 translation units. [2023-11-24 23:51:37,819 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31265b51-b089-49c9-bd8e-224a9d7df066/sv-benchmarks/c/bitvector/byte_add_1-2.i [2023-11-24 23:51:37,832 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31265b51-b089-49c9-bd8e-224a9d7df066/bin/utaipan-verify-SwPr7d2a91/data/29d91df3b/d510bb9340d34356a26c6734ee1dd153/FLAGa2cddbef7 [2023-11-24 23:51:37,854 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31265b51-b089-49c9-bd8e-224a9d7df066/bin/utaipan-verify-SwPr7d2a91/data/29d91df3b/d510bb9340d34356a26c6734ee1dd153 [2023-11-24 23:51:37,863 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-24 23:51:37,865 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-24 23:51:37,868 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-24 23:51:37,868 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-24 23:51:37,873 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-24 23:51:37,874 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.11 11:51:37" (1/1) ... [2023-11-24 23:51:37,875 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@131d151f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:51:37, skipping insertion in model container [2023-11-24 23:51:37,876 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.11 11:51:37" (1/1) ... [2023-11-24 23:51:37,921 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-24 23:51:38,227 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-24 23:51:38,251 INFO L202 MainTranslator]: Completed pre-run [2023-11-24 23:51:38,287 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-24 23:51:38,303 INFO L206 MainTranslator]: Completed translation [2023-11-24 23:51:38,304 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:51:38 WrapperNode [2023-11-24 23:51:38,304 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-24 23:51:38,305 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-24 23:51:38,305 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-24 23:51:38,306 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-24 23:51:38,314 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:51:38" (1/1) ... [2023-11-24 23:51:38,325 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:51:38" (1/1) ... [2023-11-24 23:51:38,392 INFO L138 Inliner]: procedures = 16, calls = 9, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 197 [2023-11-24 23:51:38,392 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-24 23:51:38,393 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-24 23:51:38,393 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-24 23:51:38,394 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-24 23:51:38,404 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:51:38" (1/1) ... [2023-11-24 23:51:38,405 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:51:38" (1/1) ... [2023-11-24 23:51:38,409 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:51:38" (1/1) ... [2023-11-24 23:51:38,410 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:51:38" (1/1) ... [2023-11-24 23:51:38,422 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:51:38" (1/1) ... [2023-11-24 23:51:38,427 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:51:38" (1/1) ... [2023-11-24 23:51:38,430 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:51:38" (1/1) ... [2023-11-24 23:51:38,433 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:51:38" (1/1) ... [2023-11-24 23:51:38,438 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-24 23:51:38,439 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-24 23:51:38,439 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-24 23:51:38,440 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-24 23:51:38,440 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:51:38" (1/1) ... [2023-11-24 23:51:38,447 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-24 23:51:38,464 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31265b51-b089-49c9-bd8e-224a9d7df066/bin/utaipan-verify-SwPr7d2a91/z3 [2023-11-24 23:51:38,478 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31265b51-b089-49c9-bd8e-224a9d7df066/bin/utaipan-verify-SwPr7d2a91/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-24 23:51:38,510 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31265b51-b089-49c9-bd8e-224a9d7df066/bin/utaipan-verify-SwPr7d2a91/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-24 23:51:38,534 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-24 23:51:38,535 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-24 23:51:38,535 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-24 23:51:38,535 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-24 23:51:38,627 INFO L241 CfgBuilder]: Building ICFG [2023-11-24 23:51:38,631 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-24 23:51:39,189 INFO L282 CfgBuilder]: Performing block encoding [2023-11-24 23:51:39,342 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-24 23:51:39,343 INFO L309 CfgBuilder]: Removed 2 assume(true) statements. [2023-11-24 23:51:39,344 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.11 11:51:39 BoogieIcfgContainer [2023-11-24 23:51:39,345 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-24 23:51:39,348 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-24 23:51:39,348 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-24 23:51:39,351 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-24 23:51:39,352 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.11 11:51:37" (1/3) ... [2023-11-24 23:51:39,353 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@14132bfd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.11 11:51:39, skipping insertion in model container [2023-11-24 23:51:39,353 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:51:38" (2/3) ... [2023-11-24 23:51:39,353 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@14132bfd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.11 11:51:39, skipping insertion in model container [2023-11-24 23:51:39,354 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.11 11:51:39" (3/3) ... [2023-11-24 23:51:39,355 INFO L112 eAbstractionObserver]: Analyzing ICFG byte_add_1-2.i [2023-11-24 23:51:39,413 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-24 23:51:39,413 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 41 error locations. [2023-11-24 23:51:39,495 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-24 23:51:39,503 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;@31e66b1, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-24 23:51:39,503 INFO L358 AbstractCegarLoop]: Starting to check reachability of 41 error locations. [2023-11-24 23:51:39,508 INFO L276 IsEmpty]: Start isEmpty. Operand has 105 states, 63 states have (on average 1.9365079365079365) internal successors, (122), 104 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 23:51:39,515 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2023-11-24 23:51:39,516 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 23:51:39,517 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2023-11-24 23:51:39,517 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 38 more)] === [2023-11-24 23:51:39,526 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 23:51:39,526 INFO L85 PathProgramCache]: Analyzing trace with hash 337472, now seen corresponding path program 1 times [2023-11-24 23:51:39,536 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-24 23:51:39,537 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [599796213] [2023-11-24 23:51:39,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:51:39,538 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 23:51:39,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:51:39,745 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 23:51:39,745 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-24 23:51:39,746 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [599796213] [2023-11-24 23:51:39,746 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [599796213] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 23:51:39,747 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 23:51:39,747 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-24 23:51:39,749 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1754759570] [2023-11-24 23:51:39,749 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 23:51:39,753 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-24 23:51:39,754 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-24 23:51:39,793 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-24 23:51:39,794 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-24 23:51:39,797 INFO L87 Difference]: Start difference. First operand has 105 states, 63 states have (on average 1.9365079365079365) internal successors, (122), 104 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 1 states have (on average 3.0) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 23:51:39,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 23:51:39,870 INFO L93 Difference]: Finished difference Result 105 states and 122 transitions. [2023-11-24 23:51:39,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-24 23:51:39,873 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 1 states have (on average 3.0) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 3 [2023-11-24 23:51:39,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 23:51:39,883 INFO L225 Difference]: With dead ends: 105 [2023-11-24 23:51:39,884 INFO L226 Difference]: Without dead ends: 64 [2023-11-24 23:51:39,887 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-24 23:51:39,893 INFO L413 NwaCegarLoop]: 74 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 74 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-24 23:51:39,895 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 74 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-24 23:51:39,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2023-11-24 23:51:39,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 64. [2023-11-24 23:51:39,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 63 states have (on average 1.2857142857142858) internal successors, (81), 63 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 23:51:39,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 81 transitions. [2023-11-24 23:51:39,943 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 81 transitions. Word has length 3 [2023-11-24 23:51:39,943 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 23:51:39,943 INFO L495 AbstractCegarLoop]: Abstraction has 64 states and 81 transitions. [2023-11-24 23:51:39,943 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 1 states have (on average 3.0) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 23:51:39,945 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 81 transitions. [2023-11-24 23:51:39,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2023-11-24 23:51:39,948 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 23:51:39,948 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 23:51:39,948 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-24 23:51:39,949 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr40ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 38 more)] === [2023-11-24 23:51:39,950 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 23:51:39,950 INFO L85 PathProgramCache]: Analyzing trace with hash 890734429, now seen corresponding path program 1 times [2023-11-24 23:51:39,950 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-24 23:51:39,951 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1536448280] [2023-11-24 23:51:39,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:51:39,951 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 23:51:40,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:51:40,228 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 23:51:40,228 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-24 23:51:40,228 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1536448280] [2023-11-24 23:51:40,229 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1536448280] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 23:51:40,229 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 23:51:40,229 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-24 23:51:40,229 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [700362114] [2023-11-24 23:51:40,230 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 23:51:40,231 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 23:51:40,231 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-24 23:51:40,232 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 23:51:40,232 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 23:51:40,232 INFO L87 Difference]: Start difference. First operand 64 states and 81 transitions. Second operand has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 3 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 23:51:40,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 23:51:40,344 INFO L93 Difference]: Finished difference Result 128 states and 168 transitions. [2023-11-24 23:51:40,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 23:51:40,345 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 3 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2023-11-24 23:51:40,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 23:51:40,347 INFO L225 Difference]: With dead ends: 128 [2023-11-24 23:51:40,347 INFO L226 Difference]: Without dead ends: 85 [2023-11-24 23:51:40,348 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 23:51:40,349 INFO L413 NwaCegarLoop]: 59 mSDtfsCounter, 21 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 52 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 109 SdHoareTripleChecker+Invalid, 60 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 52 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-24 23:51:40,350 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 109 Invalid, 60 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 52 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-24 23:51:40,351 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2023-11-24 23:51:40,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 80. [2023-11-24 23:51:40,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 79 states have (on average 1.2658227848101267) internal successors, (100), 79 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 23:51:40,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 100 transitions. [2023-11-24 23:51:40,360 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 100 transitions. Word has length 16 [2023-11-24 23:51:40,361 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 23:51:40,361 INFO L495 AbstractCegarLoop]: Abstraction has 80 states and 100 transitions. [2023-11-24 23:51:40,361 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 3 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 23:51:40,361 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 100 transitions. [2023-11-24 23:51:40,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2023-11-24 23:51:40,363 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 23:51:40,363 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 23:51:40,363 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-24 23:51:40,364 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr40ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 38 more)] === [2023-11-24 23:51:40,364 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 23:51:40,364 INFO L85 PathProgramCache]: Analyzing trace with hash -389099631, now seen corresponding path program 1 times [2023-11-24 23:51:40,365 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-24 23:51:40,365 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2099189357] [2023-11-24 23:51:40,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:51:40,366 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 23:51:40,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:51:40,612 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 23:51:40,613 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-24 23:51:40,613 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2099189357] [2023-11-24 23:51:40,613 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2099189357] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-24 23:51:40,614 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [961328745] [2023-11-24 23:51:40,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:51:40,614 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 23:51:40,615 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31265b51-b089-49c9-bd8e-224a9d7df066/bin/utaipan-verify-SwPr7d2a91/z3 [2023-11-24 23:51:40,619 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31265b51-b089-49c9-bd8e-224a9d7df066/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 23:51:40,620 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31265b51-b089-49c9-bd8e-224a9d7df066/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-24 23:51:40,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:51:40,700 INFO L262 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-24 23:51:40,705 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 23:51:40,751 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 23:51:40,751 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-24 23:51:40,963 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 23:51:40,964 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [961328745] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-24 23:51:40,964 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-11-24 23:51:40,965 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 8 [2023-11-24 23:51:40,966 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2055662652] [2023-11-24 23:51:40,969 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 23:51:40,973 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-24 23:51:40,973 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-24 23:51:40,975 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-24 23:51:40,976 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2023-11-24 23:51:40,977 INFO L87 Difference]: Start difference. First operand 80 states and 100 transitions. Second operand has 5 states, 4 states have (on average 4.75) internal successors, (19), 5 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 23:51:41,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 23:51:41,238 INFO L93 Difference]: Finished difference Result 124 states and 162 transitions. [2023-11-24 23:51:41,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-24 23:51:41,239 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 4.75) internal successors, (19), 5 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2023-11-24 23:51:41,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 23:51:41,240 INFO L225 Difference]: With dead ends: 124 [2023-11-24 23:51:41,241 INFO L226 Difference]: Without dead ends: 110 [2023-11-24 23:51:41,241 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2023-11-24 23:51:41,242 INFO L413 NwaCegarLoop]: 79 mSDtfsCounter, 91 mSDsluCounter, 86 mSDsCounter, 0 mSdLazyCounter, 102 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 91 SdHoareTripleChecker+Valid, 165 SdHoareTripleChecker+Invalid, 126 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 102 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-24 23:51:41,243 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [91 Valid, 165 Invalid, 126 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 102 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-24 23:51:41,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2023-11-24 23:51:41,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 77. [2023-11-24 23:51:41,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 76 states have (on average 1.25) internal successors, (95), 76 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 23:51:41,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 95 transitions. [2023-11-24 23:51:41,253 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 95 transitions. Word has length 19 [2023-11-24 23:51:41,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 23:51:41,254 INFO L495 AbstractCegarLoop]: Abstraction has 77 states and 95 transitions. [2023-11-24 23:51:41,254 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 4.75) internal successors, (19), 5 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 23:51:41,254 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 95 transitions. [2023-11-24 23:51:41,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2023-11-24 23:51:41,256 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 23:51:41,256 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 23:51:41,266 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31265b51-b089-49c9-bd8e-224a9d7df066/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-24 23:51:41,461 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31265b51-b089-49c9-bd8e-224a9d7df066/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 23:51:41,462 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr40ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 38 more)] === [2023-11-24 23:51:41,463 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 23:51:41,463 INFO L85 PathProgramCache]: Analyzing trace with hash 1797062224, now seen corresponding path program 1 times [2023-11-24 23:51:41,463 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-24 23:51:41,463 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [362852442] [2023-11-24 23:51:41,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:51:41,464 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 23:51:41,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:51:41,595 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 23:51:41,595 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-24 23:51:41,596 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [362852442] [2023-11-24 23:51:41,596 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [362852442] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 23:51:41,596 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 23:51:41,596 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-24 23:51:41,597 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [793114153] [2023-11-24 23:51:41,597 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 23:51:41,597 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-24 23:51:41,597 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-24 23:51:41,598 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-24 23:51:41,598 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-24 23:51:41,599 INFO L87 Difference]: Start difference. First operand 77 states and 95 transitions. Second operand has 5 states, 5 states have (on average 4.4) internal successors, (22), 5 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 23:51:41,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 23:51:41,757 INFO L93 Difference]: Finished difference Result 126 states and 156 transitions. [2023-11-24 23:51:41,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-24 23:51:41,758 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.4) internal successors, (22), 5 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2023-11-24 23:51:41,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 23:51:41,759 INFO L225 Difference]: With dead ends: 126 [2023-11-24 23:51:41,760 INFO L226 Difference]: Without dead ends: 85 [2023-11-24 23:51:41,760 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2023-11-24 23:51:41,761 INFO L413 NwaCegarLoop]: 50 mSDtfsCounter, 100 mSDsluCounter, 68 mSDsCounter, 0 mSdLazyCounter, 65 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 100 SdHoareTripleChecker+Valid, 118 SdHoareTripleChecker+Invalid, 71 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 65 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-24 23:51:41,762 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [100 Valid, 118 Invalid, 71 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 65 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-24 23:51:41,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2023-11-24 23:51:41,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 78. [2023-11-24 23:51:41,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 77 states have (on average 1.2467532467532467) internal successors, (96), 77 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 23:51:41,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 96 transitions. [2023-11-24 23:51:41,770 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 96 transitions. Word has length 22 [2023-11-24 23:51:41,771 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 23:51:41,771 INFO L495 AbstractCegarLoop]: Abstraction has 78 states and 96 transitions. [2023-11-24 23:51:41,771 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.4) internal successors, (22), 5 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 23:51:41,771 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 96 transitions. [2023-11-24 23:51:41,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2023-11-24 23:51:41,773 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 23:51:41,773 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 23:51:41,773 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-24 23:51:41,773 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr40ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 38 more)] === [2023-11-24 23:51:41,774 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 23:51:41,774 INFO L85 PathProgramCache]: Analyzing trace with hash -784405282, now seen corresponding path program 1 times [2023-11-24 23:51:41,774 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-24 23:51:41,775 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2124033730] [2023-11-24 23:51:41,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:51:41,775 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 23:51:41,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:51:41,901 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 23:51:41,902 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-24 23:51:41,902 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2124033730] [2023-11-24 23:51:41,902 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2124033730] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 23:51:41,902 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 23:51:41,903 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-24 23:51:41,903 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1969811007] [2023-11-24 23:51:41,903 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 23:51:41,904 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-24 23:51:41,904 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-24 23:51:41,904 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-24 23:51:41,905 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-24 23:51:41,905 INFO L87 Difference]: Start difference. First operand 78 states and 96 transitions. Second operand has 4 states, 4 states have (on average 7.0) internal successors, (28), 4 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 23:51:42,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 23:51:42,097 INFO L93 Difference]: Finished difference Result 164 states and 219 transitions. [2023-11-24 23:51:42,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-24 23:51:42,098 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.0) internal successors, (28), 4 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2023-11-24 23:51:42,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 23:51:42,099 INFO L225 Difference]: With dead ends: 164 [2023-11-24 23:51:42,099 INFO L226 Difference]: Without dead ends: 122 [2023-11-24 23:51:42,100 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-24 23:51:42,101 INFO L413 NwaCegarLoop]: 54 mSDtfsCounter, 60 mSDsluCounter, 95 mSDsCounter, 0 mSdLazyCounter, 88 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 149 SdHoareTripleChecker+Invalid, 112 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 88 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-24 23:51:42,101 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [60 Valid, 149 Invalid, 112 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 88 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-24 23:51:42,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2023-11-24 23:51:42,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 92. [2023-11-24 23:51:42,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 91 states have (on average 1.2747252747252746) internal successors, (116), 91 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 23:51:42,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 116 transitions. [2023-11-24 23:51:42,123 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 116 transitions. Word has length 28 [2023-11-24 23:51:42,123 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 23:51:42,124 INFO L495 AbstractCegarLoop]: Abstraction has 92 states and 116 transitions. [2023-11-24 23:51:42,124 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.0) internal successors, (28), 4 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 23:51:42,124 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 116 transitions. [2023-11-24 23:51:42,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2023-11-24 23:51:42,128 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 23:51:42,128 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 23:51:42,128 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-24 23:51:42,130 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr40ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 38 more)] === [2023-11-24 23:51:42,131 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 23:51:42,131 INFO L85 PathProgramCache]: Analyzing trace with hash -1956085999, now seen corresponding path program 1 times [2023-11-24 23:51:42,131 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-24 23:51:42,131 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1788266963] [2023-11-24 23:51:42,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:51:42,132 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 23:51:42,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:51:42,417 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-24 23:51:42,421 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-24 23:51:42,421 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1788266963] [2023-11-24 23:51:42,421 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1788266963] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 23:51:42,421 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 23:51:42,421 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-24 23:51:42,422 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [125832550] [2023-11-24 23:51:42,422 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 23:51:42,422 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-24 23:51:42,422 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-24 23:51:42,423 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-24 23:51:42,428 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-24 23:51:42,429 INFO L87 Difference]: Start difference. First operand 92 states and 116 transitions. Second operand has 4 states, 4 states have (on average 7.75) internal successors, (31), 3 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 23:51:42,586 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 23:51:42,586 INFO L93 Difference]: Finished difference Result 256 states and 319 transitions. [2023-11-24 23:51:42,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-24 23:51:42,587 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.75) internal successors, (31), 3 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2023-11-24 23:51:42,587 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 23:51:42,588 INFO L225 Difference]: With dead ends: 256 [2023-11-24 23:51:42,588 INFO L226 Difference]: Without dead ends: 188 [2023-11-24 23:51:42,589 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-24 23:51:42,590 INFO L413 NwaCegarLoop]: 65 mSDtfsCounter, 101 mSDsluCounter, 114 mSDsCounter, 0 mSdLazyCounter, 78 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 101 SdHoareTripleChecker+Valid, 179 SdHoareTripleChecker+Invalid, 78 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 78 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-24 23:51:42,591 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [101 Valid, 179 Invalid, 78 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 78 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-24 23:51:42,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2023-11-24 23:51:42,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 105. [2023-11-24 23:51:42,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 104 states have (on average 1.2692307692307692) internal successors, (132), 104 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 23:51:42,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 132 transitions. [2023-11-24 23:51:42,601 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 132 transitions. Word has length 34 [2023-11-24 23:51:42,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 23:51:42,602 INFO L495 AbstractCegarLoop]: Abstraction has 105 states and 132 transitions. [2023-11-24 23:51:42,602 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.75) internal successors, (31), 3 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 23:51:42,602 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 132 transitions. [2023-11-24 23:51:42,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2023-11-24 23:51:42,604 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 23:51:42,604 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 23:51:42,604 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-24 23:51:42,604 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr40ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 38 more)] === [2023-11-24 23:51:42,605 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 23:51:42,605 INFO L85 PathProgramCache]: Analyzing trace with hash -1297740043, now seen corresponding path program 1 times [2023-11-24 23:51:42,605 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-24 23:51:42,605 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [666593906] [2023-11-24 23:51:42,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:51:42,606 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 23:51:42,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:51:42,768 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-24 23:51:42,768 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-24 23:51:42,768 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [666593906] [2023-11-24 23:51:42,769 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [666593906] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 23:51:42,769 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 23:51:42,769 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-24 23:51:42,769 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [968460380] [2023-11-24 23:51:42,769 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 23:51:42,770 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-24 23:51:42,770 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-24 23:51:42,770 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-24 23:51:42,771 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-24 23:51:42,771 INFO L87 Difference]: Start difference. First operand 105 states and 132 transitions. Second operand has 4 states, 4 states have (on average 7.75) internal successors, (31), 4 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 23:51:42,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 23:51:42,904 INFO L93 Difference]: Finished difference Result 262 states and 325 transitions. [2023-11-24 23:51:42,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-24 23:51:42,905 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.75) internal successors, (31), 4 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2023-11-24 23:51:42,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 23:51:42,906 INFO L225 Difference]: With dead ends: 262 [2023-11-24 23:51:42,906 INFO L226 Difference]: Without dead ends: 195 [2023-11-24 23:51:42,907 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-24 23:51:42,908 INFO L413 NwaCegarLoop]: 58 mSDtfsCounter, 83 mSDsluCounter, 112 mSDsCounter, 0 mSdLazyCounter, 80 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 83 SdHoareTripleChecker+Valid, 170 SdHoareTripleChecker+Invalid, 80 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 80 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-24 23:51:42,908 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [83 Valid, 170 Invalid, 80 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 80 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-24 23:51:42,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2023-11-24 23:51:42,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 117. [2023-11-24 23:51:42,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 116 states have (on average 1.25) internal successors, (145), 116 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 23:51:42,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 145 transitions. [2023-11-24 23:51:42,920 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 145 transitions. Word has length 34 [2023-11-24 23:51:42,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 23:51:42,921 INFO L495 AbstractCegarLoop]: Abstraction has 117 states and 145 transitions. [2023-11-24 23:51:42,921 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.75) internal successors, (31), 4 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 23:51:42,921 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 145 transitions. [2023-11-24 23:51:42,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2023-11-24 23:51:42,922 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 23:51:42,923 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 23:51:42,923 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-11-24 23:51:42,923 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr40ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 38 more)] === [2023-11-24 23:51:42,923 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 23:51:42,924 INFO L85 PathProgramCache]: Analyzing trace with hash 1907728293, now seen corresponding path program 1 times [2023-11-24 23:51:42,924 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-24 23:51:42,924 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [987911923] [2023-11-24 23:51:42,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:51:42,924 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 23:51:42,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:51:43,199 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 23:51:43,199 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-24 23:51:43,199 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [987911923] [2023-11-24 23:51:43,199 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [987911923] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-24 23:51:43,200 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1399200459] [2023-11-24 23:51:43,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:51:43,200 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 23:51:43,200 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31265b51-b089-49c9-bd8e-224a9d7df066/bin/utaipan-verify-SwPr7d2a91/z3 [2023-11-24 23:51:43,201 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31265b51-b089-49c9-bd8e-224a9d7df066/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 23:51:43,209 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31265b51-b089-49c9-bd8e-224a9d7df066/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-24 23:51:43,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:51:43,310 INFO L262 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 20 conjunts are in the unsatisfiable core [2023-11-24 23:51:43,313 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 23:51:43,608 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 23:51:43,609 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-24 23:51:43,609 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1399200459] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 23:51:43,609 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-24 23:51:43,609 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [6] total 13 [2023-11-24 23:51:43,610 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1422907305] [2023-11-24 23:51:43,610 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 23:51:43,610 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-24 23:51:43,610 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-24 23:51:43,611 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-24 23:51:43,611 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=99, Unknown=0, NotChecked=0, Total=156 [2023-11-24 23:51:43,611 INFO L87 Difference]: Start difference. First operand 117 states and 145 transitions. Second operand has 9 states, 9 states have (on average 4.111111111111111) internal successors, (37), 9 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 23:51:43,854 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 23:51:43,854 INFO L93 Difference]: Finished difference Result 264 states and 332 transitions. [2023-11-24 23:51:43,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-24 23:51:43,855 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.111111111111111) internal successors, (37), 9 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2023-11-24 23:51:43,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 23:51:43,856 INFO L225 Difference]: With dead ends: 264 [2023-11-24 23:51:43,856 INFO L226 Difference]: Without dead ends: 197 [2023-11-24 23:51:43,857 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=67, Invalid=115, Unknown=0, NotChecked=0, Total=182 [2023-11-24 23:51:43,858 INFO L413 NwaCegarLoop]: 70 mSDtfsCounter, 151 mSDsluCounter, 220 mSDsCounter, 0 mSdLazyCounter, 223 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 151 SdHoareTripleChecker+Valid, 290 SdHoareTripleChecker+Invalid, 238 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 223 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-24 23:51:43,858 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [151 Valid, 290 Invalid, 238 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 223 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-24 23:51:43,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2023-11-24 23:51:43,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 171. [2023-11-24 23:51:43,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 171 states, 170 states have (on average 1.2529411764705882) internal successors, (213), 170 states have internal predecessors, (213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 23:51:43,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 213 transitions. [2023-11-24 23:51:43,869 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 213 transitions. Word has length 37 [2023-11-24 23:51:43,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 23:51:43,869 INFO L495 AbstractCegarLoop]: Abstraction has 171 states and 213 transitions. [2023-11-24 23:51:43,869 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.111111111111111) internal successors, (37), 9 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 23:51:43,869 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 213 transitions. [2023-11-24 23:51:43,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2023-11-24 23:51:43,871 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 23:51:43,871 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 23:51:43,885 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31265b51-b089-49c9-bd8e-224a9d7df066/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-24 23:51:44,077 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31265b51-b089-49c9-bd8e-224a9d7df066/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 23:51:44,077 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr40ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 38 more)] === [2023-11-24 23:51:44,078 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 23:51:44,078 INFO L85 PathProgramCache]: Analyzing trace with hash -1329541010, now seen corresponding path program 1 times [2023-11-24 23:51:44,078 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-24 23:51:44,078 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [886343075] [2023-11-24 23:51:44,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:51:44,078 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 23:51:44,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:51:44,347 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 23:51:44,347 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-24 23:51:44,347 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [886343075] [2023-11-24 23:51:44,347 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [886343075] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-24 23:51:44,347 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1216300373] [2023-11-24 23:51:44,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:51:44,347 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 23:51:44,348 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31265b51-b089-49c9-bd8e-224a9d7df066/bin/utaipan-verify-SwPr7d2a91/z3 [2023-11-24 23:51:44,349 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31265b51-b089-49c9-bd8e-224a9d7df066/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 23:51:44,372 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31265b51-b089-49c9-bd8e-224a9d7df066/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-24 23:51:44,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:51:44,503 INFO L262 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 23 conjunts are in the unsatisfiable core [2023-11-24 23:51:44,506 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 23:51:44,743 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 23:51:44,743 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-24 23:51:44,743 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1216300373] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 23:51:44,744 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-24 23:51:44,744 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [5] total 11 [2023-11-24 23:51:44,744 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [517245426] [2023-11-24 23:51:44,744 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 23:51:44,745 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-24 23:51:44,745 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-24 23:51:44,745 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-24 23:51:44,745 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=83, Unknown=0, NotChecked=0, Total=132 [2023-11-24 23:51:44,746 INFO L87 Difference]: Start difference. First operand 171 states and 213 transitions. Second operand has 8 states, 8 states have (on average 4.625) internal successors, (37), 7 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 23:51:44,976 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 23:51:44,976 INFO L93 Difference]: Finished difference Result 431 states and 535 transitions. [2023-11-24 23:51:44,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-24 23:51:44,977 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.625) internal successors, (37), 7 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2023-11-24 23:51:44,977 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 23:51:44,979 INFO L225 Difference]: With dead ends: 431 [2023-11-24 23:51:44,979 INFO L226 Difference]: Without dead ends: 305 [2023-11-24 23:51:44,979 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=58, Invalid=98, Unknown=0, NotChecked=0, Total=156 [2023-11-24 23:51:44,980 INFO L413 NwaCegarLoop]: 90 mSDtfsCounter, 138 mSDsluCounter, 223 mSDsCounter, 0 mSdLazyCounter, 184 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 138 SdHoareTripleChecker+Valid, 313 SdHoareTripleChecker+Invalid, 196 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 184 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-24 23:51:44,980 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [138 Valid, 313 Invalid, 196 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 184 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-24 23:51:44,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 305 states. [2023-11-24 23:51:44,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 305 to 288. [2023-11-24 23:51:44,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 288 states, 287 states have (on average 1.240418118466899) internal successors, (356), 287 states have internal predecessors, (356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 23:51:44,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 288 states to 288 states and 356 transitions. [2023-11-24 23:51:44,994 INFO L78 Accepts]: Start accepts. Automaton has 288 states and 356 transitions. Word has length 37 [2023-11-24 23:51:44,995 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 23:51:44,995 INFO L495 AbstractCegarLoop]: Abstraction has 288 states and 356 transitions. [2023-11-24 23:51:44,995 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.625) internal successors, (37), 7 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 23:51:44,995 INFO L276 IsEmpty]: Start isEmpty. Operand 288 states and 356 transitions. [2023-11-24 23:51:44,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2023-11-24 23:51:44,996 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 23:51:44,996 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 23:51:45,005 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31265b51-b089-49c9-bd8e-224a9d7df066/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-24 23:51:45,203 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31265b51-b089-49c9-bd8e-224a9d7df066/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 23:51:45,203 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr40ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 38 more)] === [2023-11-24 23:51:45,203 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 23:51:45,203 INFO L85 PathProgramCache]: Analyzing trace with hash -219846794, now seen corresponding path program 1 times [2023-11-24 23:51:45,204 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-24 23:51:45,204 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [871469346] [2023-11-24 23:51:45,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:51:45,204 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 23:51:45,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:51:45,523 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 23:51:45,523 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-24 23:51:45,523 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [871469346] [2023-11-24 23:51:45,523 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [871469346] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-24 23:51:45,524 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1033149538] [2023-11-24 23:51:45,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:51:45,524 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 23:51:45,524 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31265b51-b089-49c9-bd8e-224a9d7df066/bin/utaipan-verify-SwPr7d2a91/z3 [2023-11-24 23:51:45,525 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31265b51-b089-49c9-bd8e-224a9d7df066/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 23:51:45,556 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31265b51-b089-49c9-bd8e-224a9d7df066/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-24 23:51:45,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:51:45,600 INFO L262 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-24 23:51:45,602 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 23:51:45,700 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-24 23:51:45,700 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-24 23:51:45,700 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1033149538] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 23:51:45,700 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-24 23:51:45,701 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [5] total 10 [2023-11-24 23:51:45,701 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1210251544] [2023-11-24 23:51:45,701 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 23:51:45,701 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-24 23:51:45,702 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-24 23:51:45,702 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-24 23:51:45,702 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2023-11-24 23:51:45,703 INFO L87 Difference]: Start difference. First operand 288 states and 356 transitions. Second operand has 7 states, 7 states have (on average 5.285714285714286) internal successors, (37), 6 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 23:51:45,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 23:51:45,984 INFO L93 Difference]: Finished difference Result 602 states and 741 transitions. [2023-11-24 23:51:45,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-24 23:51:45,985 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.285714285714286) internal successors, (37), 6 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2023-11-24 23:51:45,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 23:51:45,988 INFO L225 Difference]: With dead ends: 602 [2023-11-24 23:51:45,988 INFO L226 Difference]: Without dead ends: 534 [2023-11-24 23:51:45,989 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2023-11-24 23:51:45,990 INFO L413 NwaCegarLoop]: 173 mSDtfsCounter, 313 mSDsluCounter, 456 mSDsCounter, 0 mSdLazyCounter, 216 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 313 SdHoareTripleChecker+Valid, 629 SdHoareTripleChecker+Invalid, 220 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 216 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-24 23:51:45,990 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [313 Valid, 629 Invalid, 220 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 216 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-24 23:51:45,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 534 states. [2023-11-24 23:51:46,006 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 534 to 354. [2023-11-24 23:51:46,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 354 states, 353 states have (on average 1.2521246458923512) internal successors, (442), 353 states have internal predecessors, (442), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 23:51:46,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 354 states to 354 states and 442 transitions. [2023-11-24 23:51:46,009 INFO L78 Accepts]: Start accepts. Automaton has 354 states and 442 transitions. Word has length 40 [2023-11-24 23:51:46,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 23:51:46,009 INFO L495 AbstractCegarLoop]: Abstraction has 354 states and 442 transitions. [2023-11-24 23:51:46,009 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 5.285714285714286) internal successors, (37), 6 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 23:51:46,010 INFO L276 IsEmpty]: Start isEmpty. Operand 354 states and 442 transitions. [2023-11-24 23:51:46,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2023-11-24 23:51:46,011 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 23:51:46,011 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 23:51:46,022 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31265b51-b089-49c9-bd8e-224a9d7df066/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-24 23:51:46,222 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31265b51-b089-49c9-bd8e-224a9d7df066/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-11-24 23:51:46,222 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr40ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 38 more)] === [2023-11-24 23:51:46,222 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 23:51:46,223 INFO L85 PathProgramCache]: Analyzing trace with hash 438499162, now seen corresponding path program 1 times [2023-11-24 23:51:46,223 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-24 23:51:46,223 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1096728559] [2023-11-24 23:51:46,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:51:46,223 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 23:51:46,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:51:46,406 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 23:51:46,407 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-24 23:51:46,407 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1096728559] [2023-11-24 23:51:46,407 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1096728559] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-24 23:51:46,407 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1308611610] [2023-11-24 23:51:46,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:51:46,408 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 23:51:46,408 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31265b51-b089-49c9-bd8e-224a9d7df066/bin/utaipan-verify-SwPr7d2a91/z3 [2023-11-24 23:51:46,409 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31265b51-b089-49c9-bd8e-224a9d7df066/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 23:51:46,429 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31265b51-b089-49c9-bd8e-224a9d7df066/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-24 23:51:46,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:51:46,482 INFO L262 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-24 23:51:46,484 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 23:51:46,610 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-24 23:51:46,610 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-24 23:51:46,611 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1308611610] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 23:51:46,611 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-24 23:51:46,611 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [5] total 10 [2023-11-24 23:51:46,613 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1499922375] [2023-11-24 23:51:46,613 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 23:51:46,614 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-24 23:51:46,614 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-24 23:51:46,614 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-24 23:51:46,615 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2023-11-24 23:51:46,615 INFO L87 Difference]: Start difference. First operand 354 states and 442 transitions. Second operand has 7 states, 7 states have (on average 5.285714285714286) internal successors, (37), 6 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 23:51:46,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 23:51:46,961 INFO L93 Difference]: Finished difference Result 594 states and 730 transitions. [2023-11-24 23:51:46,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-24 23:51:46,962 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.285714285714286) internal successors, (37), 6 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2023-11-24 23:51:46,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 23:51:46,966 INFO L225 Difference]: With dead ends: 594 [2023-11-24 23:51:46,966 INFO L226 Difference]: Without dead ends: 526 [2023-11-24 23:51:46,966 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2023-11-24 23:51:46,967 INFO L413 NwaCegarLoop]: 180 mSDtfsCounter, 252 mSDsluCounter, 624 mSDsCounter, 0 mSdLazyCounter, 313 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 252 SdHoareTripleChecker+Valid, 804 SdHoareTripleChecker+Invalid, 316 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 313 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-24 23:51:46,967 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [252 Valid, 804 Invalid, 316 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 313 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-24 23:51:46,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 526 states. [2023-11-24 23:51:46,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 526 to 349. [2023-11-24 23:51:46,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 349 states, 348 states have (on average 1.2413793103448276) internal successors, (432), 348 states have internal predecessors, (432), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 23:51:47,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 349 states to 349 states and 432 transitions. [2023-11-24 23:51:47,000 INFO L78 Accepts]: Start accepts. Automaton has 349 states and 432 transitions. Word has length 40 [2023-11-24 23:51:47,002 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 23:51:47,003 INFO L495 AbstractCegarLoop]: Abstraction has 349 states and 432 transitions. [2023-11-24 23:51:47,003 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 5.285714285714286) internal successors, (37), 6 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 23:51:47,003 INFO L276 IsEmpty]: Start isEmpty. Operand 349 states and 432 transitions. [2023-11-24 23:51:47,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2023-11-24 23:51:47,004 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 23:51:47,005 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 23:51:47,012 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31265b51-b089-49c9-bd8e-224a9d7df066/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-24 23:51:47,211 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31265b51-b089-49c9-bd8e-224a9d7df066/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-11-24 23:51:47,211 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr40ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 38 more)] === [2023-11-24 23:51:47,212 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 23:51:47,212 INFO L85 PathProgramCache]: Analyzing trace with hash 941218135, now seen corresponding path program 1 times [2023-11-24 23:51:47,212 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-24 23:51:47,212 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1862410346] [2023-11-24 23:51:47,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:51:47,213 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 23:51:47,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:51:47,483 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 23:51:47,484 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-24 23:51:47,484 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1862410346] [2023-11-24 23:51:47,484 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1862410346] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-24 23:51:47,484 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1299624256] [2023-11-24 23:51:47,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:51:47,485 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 23:51:47,485 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31265b51-b089-49c9-bd8e-224a9d7df066/bin/utaipan-verify-SwPr7d2a91/z3 [2023-11-24 23:51:47,489 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31265b51-b089-49c9-bd8e-224a9d7df066/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 23:51:47,511 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31265b51-b089-49c9-bd8e-224a9d7df066/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-24 23:51:47,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:51:47,600 INFO L262 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 23 conjunts are in the unsatisfiable core [2023-11-24 23:51:47,603 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 23:51:48,026 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 23:51:48,026 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-24 23:51:49,266 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 23:51:49,267 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1299624256] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-24 23:51:49,267 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [355335766] [2023-11-24 23:51:49,292 INFO L159 IcfgInterpreter]: Started Sifa with 37 locations of interest [2023-11-24 23:51:49,292 INFO L166 IcfgInterpreter]: Building call graph [2023-11-24 23:51:49,296 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-24 23:51:49,302 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-24 23:51:49,302 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-24 23:51:49,415 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-24 23:51:49,584 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSifa [355335766] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 23:51:49,585 INFO L185 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2023-11-24 23:51:49,585 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5, 13, 11] total 27 [2023-11-24 23:51:49,585 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [442354824] [2023-11-24 23:51:49,586 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 23:51:49,586 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 23:51:49,586 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-24 23:51:49,586 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 23:51:49,587 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=201, Invalid=501, Unknown=0, NotChecked=0, Total=702 [2023-11-24 23:51:49,587 INFO L87 Difference]: Start difference. First operand 349 states and 432 transitions. Second operand has 3 states, 3 states have (on average 12.666666666666666) internal successors, (38), 2 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 23:51:49,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 23:51:49,672 INFO L93 Difference]: Finished difference Result 360 states and 442 transitions. [2023-11-24 23:51:49,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 23:51:49,673 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 12.666666666666666) internal successors, (38), 2 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2023-11-24 23:51:49,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 23:51:49,674 INFO L225 Difference]: With dead ends: 360 [2023-11-24 23:51:49,674 INFO L226 Difference]: Without dead ends: 146 [2023-11-24 23:51:49,675 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 108 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 300 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=201, Invalid=501, Unknown=0, NotChecked=0, Total=702 [2023-11-24 23:51:49,676 INFO L413 NwaCegarLoop]: 43 mSDtfsCounter, 66 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-24 23:51:49,676 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [66 Valid, 43 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-24 23:51:49,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2023-11-24 23:51:49,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 146. [2023-11-24 23:51:49,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 146 states, 145 states have (on average 1.2) internal successors, (174), 145 states have internal predecessors, (174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 23:51:49,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 174 transitions. [2023-11-24 23:51:49,689 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 174 transitions. Word has length 43 [2023-11-24 23:51:49,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 23:51:49,690 INFO L495 AbstractCegarLoop]: Abstraction has 146 states and 174 transitions. [2023-11-24 23:51:49,690 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 12.666666666666666) internal successors, (38), 2 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 23:51:49,690 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 174 transitions. [2023-11-24 23:51:49,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2023-11-24 23:51:49,691 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 23:51:49,691 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 23:51:49,702 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31265b51-b089-49c9-bd8e-224a9d7df066/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-24 23:51:49,903 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31265b51-b089-49c9-bd8e-224a9d7df066/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 23:51:49,903 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr40ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 38 more)] === [2023-11-24 23:51:49,904 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 23:51:49,904 INFO L85 PathProgramCache]: Analyzing trace with hash 370948392, now seen corresponding path program 1 times [2023-11-24 23:51:49,904 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-24 23:51:49,904 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [189887264] [2023-11-24 23:51:49,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:51:49,904 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 23:51:49,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:51:50,025 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-24 23:51:50,025 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-24 23:51:50,026 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [189887264] [2023-11-24 23:51:50,026 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [189887264] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 23:51:50,026 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 23:51:50,026 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-24 23:51:50,026 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [968592606] [2023-11-24 23:51:50,026 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 23:51:50,027 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-24 23:51:50,027 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-24 23:51:50,028 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-24 23:51:50,028 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-24 23:51:50,029 INFO L87 Difference]: Start difference. First operand 146 states and 174 transitions. Second operand has 4 states, 4 states have (on average 10.25) internal successors, (41), 4 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 23:51:50,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 23:51:50,205 INFO L93 Difference]: Finished difference Result 389 states and 492 transitions. [2023-11-24 23:51:50,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-24 23:51:50,205 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 10.25) internal successors, (41), 4 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2023-11-24 23:51:50,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 23:51:50,207 INFO L225 Difference]: With dead ends: 389 [2023-11-24 23:51:50,207 INFO L226 Difference]: Without dead ends: 262 [2023-11-24 23:51:50,208 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-24 23:51:50,208 INFO L413 NwaCegarLoop]: 41 mSDtfsCounter, 78 mSDsluCounter, 69 mSDsCounter, 0 mSdLazyCounter, 90 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 110 SdHoareTripleChecker+Invalid, 110 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 90 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-24 23:51:50,209 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [78 Valid, 110 Invalid, 110 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 90 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-24 23:51:50,209 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 262 states. [2023-11-24 23:51:50,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 262 to 190. [2023-11-24 23:51:50,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 190 states, 189 states have (on average 1.2645502645502646) internal successors, (239), 189 states have internal predecessors, (239), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 23:51:50,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 190 states to 190 states and 239 transitions. [2023-11-24 23:51:50,227 INFO L78 Accepts]: Start accepts. Automaton has 190 states and 239 transitions. Word has length 43 [2023-11-24 23:51:50,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 23:51:50,228 INFO L495 AbstractCegarLoop]: Abstraction has 190 states and 239 transitions. [2023-11-24 23:51:50,228 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.25) internal successors, (41), 4 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 23:51:50,228 INFO L276 IsEmpty]: Start isEmpty. Operand 190 states and 239 transitions. [2023-11-24 23:51:50,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2023-11-24 23:51:50,229 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 23:51:50,229 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 23:51:50,229 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-11-24 23:51:50,229 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr40ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 38 more)] === [2023-11-24 23:51:50,230 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 23:51:50,230 INFO L85 PathProgramCache]: Analyzing trace with hash -1700140069, now seen corresponding path program 1 times [2023-11-24 23:51:50,230 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-24 23:51:50,230 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1387210585] [2023-11-24 23:51:50,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:51:50,231 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 23:51:50,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:51:50,516 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 11 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-24 23:51:50,517 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-24 23:51:50,517 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1387210585] [2023-11-24 23:51:50,517 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1387210585] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-24 23:51:50,517 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [905778744] [2023-11-24 23:51:50,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:51:50,517 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 23:51:50,518 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31265b51-b089-49c9-bd8e-224a9d7df066/bin/utaipan-verify-SwPr7d2a91/z3 [2023-11-24 23:51:50,519 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31265b51-b089-49c9-bd8e-224a9d7df066/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 23:51:50,548 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31265b51-b089-49c9-bd8e-224a9d7df066/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-24 23:51:50,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:51:50,614 INFO L262 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-24 23:51:50,616 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 23:51:50,728 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 21 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-24 23:51:50,728 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-24 23:51:50,728 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [905778744] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 23:51:50,728 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-24 23:51:50,729 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 8 [2023-11-24 23:51:50,729 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1714489536] [2023-11-24 23:51:50,729 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 23:51:50,729 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-24 23:51:50,730 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-24 23:51:50,730 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-24 23:51:50,730 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2023-11-24 23:51:50,730 INFO L87 Difference]: Start difference. First operand 190 states and 239 transitions. Second operand has 5 states, 5 states have (on average 9.4) internal successors, (47), 4 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 23:51:50,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 23:51:50,868 INFO L93 Difference]: Finished difference Result 363 states and 456 transitions. [2023-11-24 23:51:50,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-24 23:51:50,868 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 9.4) internal successors, (47), 4 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 49 [2023-11-24 23:51:50,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 23:51:50,870 INFO L225 Difference]: With dead ends: 363 [2023-11-24 23:51:50,870 INFO L226 Difference]: Without dead ends: 193 [2023-11-24 23:51:50,870 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2023-11-24 23:51:50,871 INFO L413 NwaCegarLoop]: 56 mSDtfsCounter, 76 mSDsluCounter, 74 mSDsCounter, 0 mSdLazyCounter, 109 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 76 SdHoareTripleChecker+Valid, 130 SdHoareTripleChecker+Invalid, 118 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 109 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-24 23:51:50,872 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [76 Valid, 130 Invalid, 118 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 109 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-24 23:51:50,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2023-11-24 23:51:50,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 173. [2023-11-24 23:51:50,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 173 states, 172 states have (on average 1.1686046511627908) internal successors, (201), 172 states have internal predecessors, (201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 23:51:50,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 201 transitions. [2023-11-24 23:51:50,888 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 201 transitions. Word has length 49 [2023-11-24 23:51:50,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 23:51:50,888 INFO L495 AbstractCegarLoop]: Abstraction has 173 states and 201 transitions. [2023-11-24 23:51:50,889 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.4) internal successors, (47), 4 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 23:51:50,889 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 201 transitions. [2023-11-24 23:51:50,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2023-11-24 23:51:50,890 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 23:51:50,890 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 23:51:50,901 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31265b51-b089-49c9-bd8e-224a9d7df066/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-11-24 23:51:51,096 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31265b51-b089-49c9-bd8e-224a9d7df066/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 23:51:51,097 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr40ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 38 more)] === [2023-11-24 23:51:51,097 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 23:51:51,098 INFO L85 PathProgramCache]: Analyzing trace with hash 1508227085, now seen corresponding path program 1 times [2023-11-24 23:51:51,098 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-24 23:51:51,098 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1657917560] [2023-11-24 23:51:51,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:51:51,098 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 23:51:51,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:51:51,246 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2023-11-24 23:51:51,246 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-24 23:51:51,247 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1657917560] [2023-11-24 23:51:51,247 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1657917560] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 23:51:51,247 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 23:51:51,247 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-24 23:51:51,247 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1341053916] [2023-11-24 23:51:51,247 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 23:51:51,248 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-24 23:51:51,248 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-24 23:51:51,249 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-24 23:51:51,249 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-24 23:51:51,249 INFO L87 Difference]: Start difference. First operand 173 states and 201 transitions. Second operand has 4 states, 4 states have (on average 10.75) internal successors, (43), 4 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 23:51:51,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 23:51:51,422 INFO L93 Difference]: Finished difference Result 466 states and 565 transitions. [2023-11-24 23:51:51,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-24 23:51:51,423 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 10.75) internal successors, (43), 4 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 55 [2023-11-24 23:51:51,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 23:51:51,425 INFO L225 Difference]: With dead ends: 466 [2023-11-24 23:51:51,425 INFO L226 Difference]: Without dead ends: 312 [2023-11-24 23:51:51,426 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-24 23:51:51,427 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 96 mSDsluCounter, 65 mSDsCounter, 0 mSdLazyCounter, 91 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 96 SdHoareTripleChecker+Valid, 104 SdHoareTripleChecker+Invalid, 109 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 91 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-24 23:51:51,427 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [96 Valid, 104 Invalid, 109 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 91 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-24 23:51:51,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 312 states. [2023-11-24 23:51:51,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 312 to 212. [2023-11-24 23:51:51,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 212 states, 211 states have (on average 1.2654028436018958) internal successors, (267), 211 states have internal predecessors, (267), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 23:51:51,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 267 transitions. [2023-11-24 23:51:51,447 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 267 transitions. Word has length 55 [2023-11-24 23:51:51,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 23:51:51,447 INFO L495 AbstractCegarLoop]: Abstraction has 212 states and 267 transitions. [2023-11-24 23:51:51,448 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.75) internal successors, (43), 4 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 23:51:51,448 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 267 transitions. [2023-11-24 23:51:51,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2023-11-24 23:51:51,449 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 23:51:51,449 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 23:51:51,449 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2023-11-24 23:51:51,449 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr40ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 38 more)] === [2023-11-24 23:51:51,450 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 23:51:51,450 INFO L85 PathProgramCache]: Analyzing trace with hash -959452416, now seen corresponding path program 1 times [2023-11-24 23:51:51,450 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-24 23:51:51,450 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [132893431] [2023-11-24 23:51:51,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:51:51,451 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 23:51:51,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:51:52,473 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 34 proven. 6 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-11-24 23:51:52,473 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-24 23:51:52,473 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [132893431] [2023-11-24 23:51:52,474 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [132893431] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-24 23:51:52,474 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1319286948] [2023-11-24 23:51:52,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:51:52,474 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 23:51:52,474 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31265b51-b089-49c9-bd8e-224a9d7df066/bin/utaipan-verify-SwPr7d2a91/z3 [2023-11-24 23:51:52,477 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31265b51-b089-49c9-bd8e-224a9d7df066/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 23:51:52,504 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31265b51-b089-49c9-bd8e-224a9d7df066/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-24 23:51:52,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:51:52,573 INFO L262 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 13 conjunts are in the unsatisfiable core [2023-11-24 23:51:52,576 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 23:51:52,786 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 38 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-11-24 23:51:52,786 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-24 23:51:52,786 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1319286948] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 23:51:52,786 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-24 23:51:52,787 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [12] total 17 [2023-11-24 23:51:52,788 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [830668959] [2023-11-24 23:51:52,788 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 23:51:52,790 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-24 23:51:52,790 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-24 23:51:52,791 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-24 23:51:52,791 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2023-11-24 23:51:52,791 INFO L87 Difference]: Start difference. First operand 212 states and 267 transitions. Second operand has 6 states, 6 states have (on average 8.666666666666666) internal successors, (52), 5 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 23:51:52,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 23:51:52,989 INFO L93 Difference]: Finished difference Result 428 states and 543 transitions. [2023-11-24 23:51:52,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-24 23:51:52,990 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 8.666666666666666) internal successors, (52), 5 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 61 [2023-11-24 23:51:52,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 23:51:52,992 INFO L225 Difference]: With dead ends: 428 [2023-11-24 23:51:52,992 INFO L226 Difference]: Without dead ends: 236 [2023-11-24 23:51:52,993 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2023-11-24 23:51:52,994 INFO L413 NwaCegarLoop]: 41 mSDtfsCounter, 80 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 134 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 80 SdHoareTripleChecker+Valid, 116 SdHoareTripleChecker+Invalid, 151 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 134 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-24 23:51:52,994 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [80 Valid, 116 Invalid, 151 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 134 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-24 23:51:52,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 236 states. [2023-11-24 23:51:53,012 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 236 to 196. [2023-11-24 23:51:53,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 196 states, 195 states have (on average 1.1487179487179486) internal successors, (224), 195 states have internal predecessors, (224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 23:51:53,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 224 transitions. [2023-11-24 23:51:53,014 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 224 transitions. Word has length 61 [2023-11-24 23:51:53,014 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 23:51:53,014 INFO L495 AbstractCegarLoop]: Abstraction has 196 states and 224 transitions. [2023-11-24 23:51:53,015 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 8.666666666666666) internal successors, (52), 5 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 23:51:53,015 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 224 transitions. [2023-11-24 23:51:53,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2023-11-24 23:51:53,016 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 23:51:53,016 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 23:51:53,027 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31265b51-b089-49c9-bd8e-224a9d7df066/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-11-24 23:51:53,227 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31265b51-b089-49c9-bd8e-224a9d7df066/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-11-24 23:51:53,228 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr40ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 38 more)] === [2023-11-24 23:51:53,228 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 23:51:53,228 INFO L85 PathProgramCache]: Analyzing trace with hash -917530822, now seen corresponding path program 1 times [2023-11-24 23:51:53,228 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-24 23:51:53,228 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [327042548] [2023-11-24 23:51:53,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:51:53,229 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 23:51:53,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:51:53,437 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 22 proven. 0 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2023-11-24 23:51:53,438 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-24 23:51:53,438 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [327042548] [2023-11-24 23:51:53,438 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [327042548] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 23:51:53,438 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 23:51:53,439 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-24 23:51:53,441 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1230748198] [2023-11-24 23:51:53,441 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 23:51:53,442 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-24 23:51:53,442 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-24 23:51:53,443 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-24 23:51:53,443 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-24 23:51:53,443 INFO L87 Difference]: Start difference. First operand 196 states and 224 transitions. Second operand has 5 states, 5 states have (on average 9.4) internal successors, (47), 5 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 23:51:53,739 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 23:51:53,739 INFO L93 Difference]: Finished difference Result 427 states and 483 transitions. [2023-11-24 23:51:53,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-24 23:51:53,740 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 9.4) internal successors, (47), 5 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 67 [2023-11-24 23:51:53,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 23:51:53,742 INFO L225 Difference]: With dead ends: 427 [2023-11-24 23:51:53,742 INFO L226 Difference]: Without dead ends: 334 [2023-11-24 23:51:53,742 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2023-11-24 23:51:53,743 INFO L413 NwaCegarLoop]: 111 mSDtfsCounter, 161 mSDsluCounter, 224 mSDsCounter, 0 mSdLazyCounter, 187 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 161 SdHoareTripleChecker+Valid, 335 SdHoareTripleChecker+Invalid, 188 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 187 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-24 23:51:53,743 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [161 Valid, 335 Invalid, 188 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 187 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-24 23:51:53,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 334 states. [2023-11-24 23:51:53,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 334 to 206. [2023-11-24 23:51:53,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 206 states, 205 states have (on average 1.1414634146341462) internal successors, (234), 205 states have internal predecessors, (234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 23:51:53,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 206 states to 206 states and 234 transitions. [2023-11-24 23:51:53,764 INFO L78 Accepts]: Start accepts. Automaton has 206 states and 234 transitions. Word has length 67 [2023-11-24 23:51:53,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 23:51:53,765 INFO L495 AbstractCegarLoop]: Abstraction has 206 states and 234 transitions. [2023-11-24 23:51:53,765 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.4) internal successors, (47), 5 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 23:51:53,765 INFO L276 IsEmpty]: Start isEmpty. Operand 206 states and 234 transitions. [2023-11-24 23:51:53,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2023-11-24 23:51:53,766 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 23:51:53,766 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 23:51:53,767 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2023-11-24 23:51:53,767 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr40ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 38 more)] === [2023-11-24 23:51:53,767 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 23:51:53,767 INFO L85 PathProgramCache]: Analyzing trace with hash -1000367820, now seen corresponding path program 1 times [2023-11-24 23:51:53,768 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-24 23:51:53,768 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [447910394] [2023-11-24 23:51:53,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:51:53,768 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 23:51:53,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:51:54,635 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 21 proven. 31 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-11-24 23:51:54,635 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-24 23:51:54,635 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [447910394] [2023-11-24 23:51:54,635 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [447910394] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-24 23:51:54,635 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [97955644] [2023-11-24 23:51:54,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:51:54,636 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 23:51:54,636 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31265b51-b089-49c9-bd8e-224a9d7df066/bin/utaipan-verify-SwPr7d2a91/z3 [2023-11-24 23:51:54,639 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31265b51-b089-49c9-bd8e-224a9d7df066/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 23:51:54,660 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31265b51-b089-49c9-bd8e-224a9d7df066/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-24 23:51:54,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:51:54,980 INFO L262 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-24 23:51:54,981 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 23:51:55,092 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 22 proven. 0 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2023-11-24 23:51:55,093 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-24 23:51:55,093 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [97955644] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 23:51:55,093 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-24 23:51:55,093 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [8] total 14 [2023-11-24 23:51:55,094 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [396506944] [2023-11-24 23:51:55,094 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 23:51:55,094 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-24 23:51:55,094 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-24 23:51:55,095 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-24 23:51:55,095 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2023-11-24 23:51:55,096 INFO L87 Difference]: Start difference. First operand 206 states and 234 transitions. Second operand has 6 states, 6 states have (on average 8.333333333333334) internal successors, (50), 6 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 23:51:55,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 23:51:55,324 INFO L93 Difference]: Finished difference Result 500 states and 569 transitions. [2023-11-24 23:51:55,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-24 23:51:55,325 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 8.333333333333334) internal successors, (50), 6 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 70 [2023-11-24 23:51:55,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 23:51:55,328 INFO L225 Difference]: With dead ends: 500 [2023-11-24 23:51:55,328 INFO L226 Difference]: Without dead ends: 407 [2023-11-24 23:51:55,329 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2023-11-24 23:51:55,330 INFO L413 NwaCegarLoop]: 154 mSDtfsCounter, 173 mSDsluCounter, 358 mSDsCounter, 0 mSdLazyCounter, 164 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 173 SdHoareTripleChecker+Valid, 512 SdHoareTripleChecker+Invalid, 166 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 164 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-24 23:51:55,330 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [173 Valid, 512 Invalid, 166 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 164 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-24 23:51:55,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 407 states. [2023-11-24 23:51:55,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 407 to 292. [2023-11-24 23:51:55,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 292 states, 291 states have (on average 1.147766323024055) internal successors, (334), 291 states have internal predecessors, (334), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 23:51:55,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 292 states to 292 states and 334 transitions. [2023-11-24 23:51:55,364 INFO L78 Accepts]: Start accepts. Automaton has 292 states and 334 transitions. Word has length 70 [2023-11-24 23:51:55,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 23:51:55,365 INFO L495 AbstractCegarLoop]: Abstraction has 292 states and 334 transitions. [2023-11-24 23:51:55,365 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 8.333333333333334) internal successors, (50), 6 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 23:51:55,365 INFO L276 IsEmpty]: Start isEmpty. Operand 292 states and 334 transitions. [2023-11-24 23:51:55,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2023-11-24 23:51:55,366 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 23:51:55,367 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 23:51:55,378 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31265b51-b089-49c9-bd8e-224a9d7df066/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-11-24 23:51:55,573 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31265b51-b089-49c9-bd8e-224a9d7df066/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-11-24 23:51:55,573 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr40ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 38 more)] === [2023-11-24 23:51:55,574 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 23:51:55,574 INFO L85 PathProgramCache]: Analyzing trace with hash 997032752, now seen corresponding path program 1 times [2023-11-24 23:51:55,574 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-24 23:51:55,575 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1637055250] [2023-11-24 23:51:55,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:51:55,575 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 23:51:55,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:51:56,396 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 21 proven. 31 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-11-24 23:51:56,397 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-24 23:51:56,397 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1637055250] [2023-11-24 23:51:56,397 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1637055250] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-24 23:51:56,397 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1518664603] [2023-11-24 23:51:56,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:51:56,398 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 23:51:56,398 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31265b51-b089-49c9-bd8e-224a9d7df066/bin/utaipan-verify-SwPr7d2a91/z3 [2023-11-24 23:51:56,401 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31265b51-b089-49c9-bd8e-224a9d7df066/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 23:51:56,440 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31265b51-b089-49c9-bd8e-224a9d7df066/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-24 23:51:56,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:51:56,784 INFO L262 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 26 conjunts are in the unsatisfiable core [2023-11-24 23:51:56,786 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 23:51:57,252 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 36 proven. 16 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-11-24 23:51:57,253 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-24 23:51:59,860 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 52 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-11-24 23:51:59,860 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1518664603] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-24 23:51:59,860 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [569507471] [2023-11-24 23:51:59,867 INFO L159 IcfgInterpreter]: Started Sifa with 42 locations of interest [2023-11-24 23:51:59,867 INFO L166 IcfgInterpreter]: Building call graph [2023-11-24 23:51:59,867 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-24 23:51:59,868 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-24 23:51:59,868 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-24 23:52:00,738 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-24 23:52:03,175 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSifa [569507471] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 23:52:03,180 INFO L185 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2023-11-24 23:52:03,180 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [8, 8, 8] total 36 [2023-11-24 23:52:03,181 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1411302638] [2023-11-24 23:52:03,181 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 23:52:03,181 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-11-24 23:52:03,181 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-24 23:52:03,182 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-11-24 23:52:03,183 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=219, Invalid=1113, Unknown=0, NotChecked=0, Total=1332 [2023-11-24 23:52:03,183 INFO L87 Difference]: Start difference. First operand 292 states and 334 transitions. Second operand has 13 states, 13 states have (on average 3.5384615384615383) internal successors, (46), 12 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 23:52:04,864 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 23:52:04,864 INFO L93 Difference]: Finished difference Result 513 states and 582 transitions. [2023-11-24 23:52:04,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-11-24 23:52:04,865 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.5384615384615383) internal successors, (46), 12 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 72 [2023-11-24 23:52:04,865 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 23:52:04,868 INFO L225 Difference]: With dead ends: 513 [2023-11-24 23:52:04,868 INFO L226 Difference]: Without dead ends: 420 [2023-11-24 23:52:04,869 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 222 GetRequests, 187 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 496 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=219, Invalid=1113, Unknown=0, NotChecked=0, Total=1332 [2023-11-24 23:52:04,869 INFO L413 NwaCegarLoop]: 132 mSDtfsCounter, 379 mSDsluCounter, 756 mSDsCounter, 0 mSdLazyCounter, 745 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 379 SdHoareTripleChecker+Valid, 888 SdHoareTripleChecker+Invalid, 745 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 745 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2023-11-24 23:52:04,870 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [379 Valid, 888 Invalid, 745 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 745 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2023-11-24 23:52:04,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 420 states. [2023-11-24 23:52:04,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 420 to 288. [2023-11-24 23:52:04,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 288 states, 287 states have (on average 1.1498257839721255) internal successors, (330), 287 states have internal predecessors, (330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 23:52:04,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 288 states to 288 states and 330 transitions. [2023-11-24 23:52:04,899 INFO L78 Accepts]: Start accepts. Automaton has 288 states and 330 transitions. Word has length 72 [2023-11-24 23:52:04,899 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 23:52:04,899 INFO L495 AbstractCegarLoop]: Abstraction has 288 states and 330 transitions. [2023-11-24 23:52:04,900 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.5384615384615383) internal successors, (46), 12 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 23:52:04,900 INFO L276 IsEmpty]: Start isEmpty. Operand 288 states and 330 transitions. [2023-11-24 23:52:04,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2023-11-24 23:52:04,901 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 23:52:04,901 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 23:52:04,912 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31265b51-b089-49c9-bd8e-224a9d7df066/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-11-24 23:52:05,107 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31265b51-b089-49c9-bd8e-224a9d7df066/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 23:52:05,108 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr40ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 38 more)] === [2023-11-24 23:52:05,109 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 23:52:05,109 INFO L85 PathProgramCache]: Analyzing trace with hash 292145800, now seen corresponding path program 1 times [2023-11-24 23:52:05,109 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-24 23:52:05,109 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [759021209] [2023-11-24 23:52:05,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:52:05,110 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 23:52:05,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:52:05,406 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 39 proven. 7 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-11-24 23:52:05,406 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-24 23:52:05,407 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [759021209] [2023-11-24 23:52:05,407 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [759021209] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-24 23:52:05,407 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [122971942] [2023-11-24 23:52:05,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:52:05,407 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 23:52:05,408 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31265b51-b089-49c9-bd8e-224a9d7df066/bin/utaipan-verify-SwPr7d2a91/z3 [2023-11-24 23:52:05,409 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31265b51-b089-49c9-bd8e-224a9d7df066/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 23:52:05,436 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31265b51-b089-49c9-bd8e-224a9d7df066/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-11-24 23:52:05,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:52:05,547 INFO L262 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-24 23:52:05,549 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 23:52:05,685 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 39 proven. 4 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-11-24 23:52:05,685 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-24 23:52:05,869 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 43 proven. 3 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-11-24 23:52:05,870 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [122971942] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-24 23:52:05,870 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [146092918] [2023-11-24 23:52:05,880 INFO L159 IcfgInterpreter]: Started Sifa with 43 locations of interest [2023-11-24 23:52:05,881 INFO L166 IcfgInterpreter]: Building call graph [2023-11-24 23:52:05,882 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-24 23:52:05,882 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-24 23:52:05,882 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-24 23:52:09,729 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-24 23:52:15,742 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '13007#(and (exists ((|v_ULTIMATE.start_mp_add_~i~0#1_104| Int)) (= |ULTIMATE.start_mp_add_~i~0#1| (+ (mod |v_ULTIMATE.start_mp_add_~i~0#1_104| 256) 1))) (<= |ULTIMATE.start_mp_add_#t~nondet1#1| (+ (mod |ULTIMATE.start_mp_add_~r0~0#1| 256) (* (mod |ULTIMATE.start_mp_add_~r1~0#1| 256) 256))) (<= |ULTIMATE.start_mp_add_#t~nondet2#1| (+ (* 65536 (mod |ULTIMATE.start_mp_add_~r2~0#1| 256)) |ULTIMATE.start_mp_add_#t~nondet1#1|)) (= (mod |ULTIMATE.start_mp_add_~carry~0#1| 65536) 0) (<= (mod |ULTIMATE.start_mp_add_~nb~0#1| 256) (mod |ULTIMATE.start_mp_add_~i~0#1| 256)) (<= (* 65536 (mod |ULTIMATE.start_mp_add_~r2~0#1| 256)) |ULTIMATE.start_mp_add_#t~nondet2#1|) (<= 128 (mod |ULTIMATE.start_mp_add_~r3~0#1| 256)) (<= |ULTIMATE.start_mp_add_#t~nondet1#1| |ULTIMATE.start_mp_add_#t~nondet2#1|) (<= (mod |ULTIMATE.start_mp_add_~r0~0#1| 256) |ULTIMATE.start_mp_add_#t~nondet1#1|) (<= 4 (mod |ULTIMATE.start_mp_add_~i~0#1| 256)) (<= (mod |ULTIMATE.start_mp_add_~na~0#1| 256) (mod |ULTIMATE.start_mp_add_~i~0#1| 256)) (<= (* (mod |ULTIMATE.start_mp_add_~r1~0#1| 256) 256) |ULTIMATE.start_mp_add_#t~nondet1#1|))' at error location [2023-11-24 23:52:15,745 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-24 23:52:15,746 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-24 23:52:15,746 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 7] total 15 [2023-11-24 23:52:15,746 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [890186192] [2023-11-24 23:52:15,746 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-24 23:52:15,747 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-11-24 23:52:15,747 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-24 23:52:15,748 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-11-24 23:52:15,750 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=208, Invalid=1198, Unknown=0, NotChecked=0, Total=1406 [2023-11-24 23:52:15,751 INFO L87 Difference]: Start difference. First operand 288 states and 330 transitions. Second operand has 15 states, 15 states have (on average 8.2) internal successors, (123), 15 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 23:52:16,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 23:52:16,596 INFO L93 Difference]: Finished difference Result 986 states and 1152 transitions. [2023-11-24 23:52:16,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-11-24 23:52:16,597 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 8.2) internal successors, (123), 15 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 73 [2023-11-24 23:52:16,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 23:52:16,601 INFO L225 Difference]: With dead ends: 986 [2023-11-24 23:52:16,601 INFO L226 Difference]: Without dead ends: 724 [2023-11-24 23:52:16,603 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 234 GetRequests, 190 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 717 ImplicationChecksByTransitivity, 6.3s TimeCoverageRelationStatistics Valid=317, Invalid=1753, Unknown=0, NotChecked=0, Total=2070 [2023-11-24 23:52:16,604 INFO L413 NwaCegarLoop]: 93 mSDtfsCounter, 432 mSDsluCounter, 380 mSDsCounter, 0 mSdLazyCounter, 519 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 432 SdHoareTripleChecker+Valid, 473 SdHoareTripleChecker+Invalid, 571 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 519 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-11-24 23:52:16,604 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [432 Valid, 473 Invalid, 571 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 519 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-11-24 23:52:16,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 724 states. [2023-11-24 23:52:16,652 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 724 to 454. [2023-11-24 23:52:16,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 454 states, 453 states have (on average 1.17439293598234) internal successors, (532), 453 states have internal predecessors, (532), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 23:52:16,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 454 states to 454 states and 532 transitions. [2023-11-24 23:52:16,655 INFO L78 Accepts]: Start accepts. Automaton has 454 states and 532 transitions. Word has length 73 [2023-11-24 23:52:16,655 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 23:52:16,655 INFO L495 AbstractCegarLoop]: Abstraction has 454 states and 532 transitions. [2023-11-24 23:52:16,656 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 8.2) internal successors, (123), 15 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 23:52:16,656 INFO L276 IsEmpty]: Start isEmpty. Operand 454 states and 532 transitions. [2023-11-24 23:52:16,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2023-11-24 23:52:16,657 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 23:52:16,657 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 23:52:16,665 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31265b51-b089-49c9-bd8e-224a9d7df066/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-11-24 23:52:16,864 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31265b51-b089-49c9-bd8e-224a9d7df066/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 23:52:16,864 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr40ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 38 more)] === [2023-11-24 23:52:16,865 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 23:52:16,865 INFO L85 PathProgramCache]: Analyzing trace with hash -412588546, now seen corresponding path program 1 times [2023-11-24 23:52:16,865 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-24 23:52:16,865 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1111232341] [2023-11-24 23:52:16,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:52:16,865 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 23:52:16,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:52:17,800 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 21 proven. 31 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-11-24 23:52:17,800 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-24 23:52:17,800 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1111232341] [2023-11-24 23:52:17,800 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1111232341] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-24 23:52:17,801 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1355997227] [2023-11-24 23:52:17,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:52:17,801 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 23:52:17,801 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31265b51-b089-49c9-bd8e-224a9d7df066/bin/utaipan-verify-SwPr7d2a91/z3 [2023-11-24 23:52:17,802 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31265b51-b089-49c9-bd8e-224a9d7df066/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 23:52:17,812 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31265b51-b089-49c9-bd8e-224a9d7df066/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-11-24 23:52:18,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:52:18,404 INFO L262 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 26 conjunts are in the unsatisfiable core [2023-11-24 23:52:18,406 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 23:52:19,114 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 36 proven. 16 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-11-24 23:52:19,115 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-24 23:52:20,016 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 52 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-11-24 23:52:20,017 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1355997227] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-24 23:52:20,017 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [587749794] [2023-11-24 23:52:20,020 INFO L159 IcfgInterpreter]: Started Sifa with 48 locations of interest [2023-11-24 23:52:20,020 INFO L166 IcfgInterpreter]: Building call graph [2023-11-24 23:52:20,021 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-24 23:52:20,021 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-24 23:52:20,021 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs