./Ultimate.py --spec ../../sv-benchmarks/c/properties/no-overflow.prp --file ../../sv-benchmarks/c/termination-crafted-lit/GopanReps-CAV2006-Fig1a.c --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for overflows Using default analysis Version 9bd2c7ff 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_825feb88-0cf0-41a2-b2f7-7d4d1dd48149/bin/utaipan-verify-t7M7D8N6sZ/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_825feb88-0cf0-41a2-b2f7-7d4d1dd48149/bin/utaipan-verify-t7M7D8N6sZ/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_825feb88-0cf0-41a2-b2f7-7d4d1dd48149/bin/utaipan-verify-t7M7D8N6sZ/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_825feb88-0cf0-41a2-b2f7-7d4d1dd48149/bin/utaipan-verify-t7M7D8N6sZ/config/TaipanReach.xml -i ../../sv-benchmarks/c/termination-crafted-lit/GopanReps-CAV2006-Fig1a.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_825feb88-0cf0-41a2-b2f7-7d4d1dd48149/bin/utaipan-verify-t7M7D8N6sZ/config/svcomp-Overflow-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_825feb88-0cf0-41a2-b2f7-7d4d1dd48149/bin/utaipan-verify-t7M7D8N6sZ --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! overflow) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 64bit --witnessprinter.graph.data.programhash 06d48bd39a18f705c3286a70a8cdcced2226e3b2a16c7a38c85f5398d4bcad34 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-9bd2c7f [2023-11-19 04:58:21,816 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-19 04:58:21,943 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_825feb88-0cf0-41a2-b2f7-7d4d1dd48149/bin/utaipan-verify-t7M7D8N6sZ/config/svcomp-Overflow-64bit-Taipan_Default.epf [2023-11-19 04:58:21,956 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-19 04:58:21,957 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-19 04:58:22,006 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-19 04:58:22,007 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-19 04:58:22,008 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-19 04:58:22,009 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-19 04:58:22,015 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-19 04:58:22,016 INFO L153 SettingsManager]: * User list type=DISABLED [2023-11-19 04:58:22,017 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-11-19 04:58:22,018 INFO L153 SettingsManager]: * Explicit value domain=true [2023-11-19 04:58:22,020 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-11-19 04:58:22,020 INFO L153 SettingsManager]: * Octagon Domain=false [2023-11-19 04:58:22,021 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-11-19 04:58:22,021 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-11-19 04:58:22,022 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-11-19 04:58:22,023 INFO L153 SettingsManager]: * Interval Domain=false [2023-11-19 04:58:22,023 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-11-19 04:58:22,024 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-11-19 04:58:22,024 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-11-19 04:58:22,026 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-19 04:58:22,026 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-19 04:58:22,027 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-19 04:58:22,028 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-19 04:58:22,028 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-19 04:58:22,029 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-19 04:58:22,029 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-19 04:58:22,030 INFO L153 SettingsManager]: * Check absence of signed integer overflows=true [2023-11-19 04:58:22,031 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-19 04:58:22,032 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-19 04:58:22,032 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-19 04:58:22,032 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-19 04:58:22,033 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-19 04:58:22,033 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 04:58:22,033 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-19 04:58:22,034 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-19 04:58:22,034 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-19 04:58:22,034 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-11-19 04:58:22,035 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-19 04:58:22,035 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-19 04:58:22,036 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-11-19 04:58:22,036 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-19 04:58:22,037 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_825feb88-0cf0-41a2-b2f7-7d4d1dd48149/bin/utaipan-verify-t7M7D8N6sZ/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_825feb88-0cf0-41a2-b2f7-7d4d1dd48149/bin/utaipan-verify-t7M7D8N6sZ Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! overflow) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 06d48bd39a18f705c3286a70a8cdcced2226e3b2a16c7a38c85f5398d4bcad34 [2023-11-19 04:58:22,347 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-19 04:58:22,378 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-19 04:58:22,381 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-19 04:58:22,383 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-19 04:58:22,384 INFO L274 PluginConnector]: CDTParser initialized [2023-11-19 04:58:22,385 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_825feb88-0cf0-41a2-b2f7-7d4d1dd48149/bin/utaipan-verify-t7M7D8N6sZ/../../sv-benchmarks/c/termination-crafted-lit/GopanReps-CAV2006-Fig1a.c [2023-11-19 04:58:25,843 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-19 04:58:26,133 INFO L384 CDTParser]: Found 1 translation units. [2023-11-19 04:58:26,133 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_825feb88-0cf0-41a2-b2f7-7d4d1dd48149/sv-benchmarks/c/termination-crafted-lit/GopanReps-CAV2006-Fig1a.c [2023-11-19 04:58:26,141 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_825feb88-0cf0-41a2-b2f7-7d4d1dd48149/bin/utaipan-verify-t7M7D8N6sZ/data/1b13d7d83/08dc107cf573444face49fe583b531b5/FLAG4c3d86952 [2023-11-19 04:58:26,156 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_825feb88-0cf0-41a2-b2f7-7d4d1dd48149/bin/utaipan-verify-t7M7D8N6sZ/data/1b13d7d83/08dc107cf573444face49fe583b531b5 [2023-11-19 04:58:26,160 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-19 04:58:26,162 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-19 04:58:26,164 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-19 04:58:26,164 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-19 04:58:26,171 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-19 04:58:26,172 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 04:58:26" (1/1) ... [2023-11-19 04:58:26,173 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@54fc6c95 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:58:26, skipping insertion in model container [2023-11-19 04:58:26,173 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 04:58:26" (1/1) ... [2023-11-19 04:58:26,197 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-19 04:58:26,374 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 04:58:26,381 INFO L202 MainTranslator]: Completed pre-run [2023-11-19 04:58:26,397 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 04:58:26,414 INFO L206 MainTranslator]: Completed translation [2023-11-19 04:58:26,415 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:58:26 WrapperNode [2023-11-19 04:58:26,415 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-19 04:58:26,417 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-19 04:58:26,417 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-19 04:58:26,417 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-19 04:58:26,426 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:58:26" (1/1) ... [2023-11-19 04:58:26,430 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:58:26" (1/1) ... [2023-11-19 04:58:26,448 INFO L138 Inliner]: procedures = 4, calls = 2, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 22 [2023-11-19 04:58:26,449 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-19 04:58:26,450 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-19 04:58:26,450 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-19 04:58:26,450 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-19 04:58:26,462 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:58:26" (1/1) ... [2023-11-19 04:58:26,462 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:58:26" (1/1) ... [2023-11-19 04:58:26,463 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:58:26" (1/1) ... [2023-11-19 04:58:26,463 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:58:26" (1/1) ... [2023-11-19 04:58:26,466 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:58:26" (1/1) ... [2023-11-19 04:58:26,469 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:58:26" (1/1) ... [2023-11-19 04:58:26,470 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:58:26" (1/1) ... [2023-11-19 04:58:26,471 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:58:26" (1/1) ... [2023-11-19 04:58:26,473 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-19 04:58:26,474 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-19 04:58:26,474 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-19 04:58:26,474 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-19 04:58:26,476 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:58:26" (1/1) ... [2023-11-19 04:58:26,483 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 04:58:26,498 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_825feb88-0cf0-41a2-b2f7-7d4d1dd48149/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 04:58:26,513 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_825feb88-0cf0-41a2-b2f7-7d4d1dd48149/bin/utaipan-verify-t7M7D8N6sZ/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-19 04:58:26,546 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_825feb88-0cf0-41a2-b2f7-7d4d1dd48149/bin/utaipan-verify-t7M7D8N6sZ/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-19 04:58:26,566 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-19 04:58:26,566 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-19 04:58:26,650 INFO L236 CfgBuilder]: Building ICFG [2023-11-19 04:58:26,653 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-19 04:58:26,754 INFO L277 CfgBuilder]: Performing block encoding [2023-11-19 04:58:26,777 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-19 04:58:26,777 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-11-19 04:58:26,782 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 04:58:26 BoogieIcfgContainer [2023-11-19 04:58:26,782 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-19 04:58:26,786 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-19 04:58:26,786 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-19 04:58:26,790 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-19 04:58:26,791 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 04:58:26" (1/3) ... [2023-11-19 04:58:26,791 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2bcc7f76 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 04:58:26, skipping insertion in model container [2023-11-19 04:58:26,792 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:58:26" (2/3) ... [2023-11-19 04:58:26,792 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2bcc7f76 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 04:58:26, skipping insertion in model container [2023-11-19 04:58:26,792 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 04:58:26" (3/3) ... [2023-11-19 04:58:26,794 INFO L112 eAbstractionObserver]: Analyzing ICFG GopanReps-CAV2006-Fig1a.c [2023-11-19 04:58:26,825 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-19 04:58:26,825 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 6 error locations. [2023-11-19 04:58:26,882 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-19 04:58:26,891 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;@1710bd87, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-19 04:58:26,891 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2023-11-19 04:58:26,897 INFO L276 IsEmpty]: Start isEmpty. Operand has 16 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 15 states have internal predecessors, (17), 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) [2023-11-19 04:58:26,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2023-11-19 04:58:26,905 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 04:58:26,905 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2023-11-19 04:58:26,906 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2023-11-19 04:58:26,913 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 04:58:26,913 INFO L85 PathProgramCache]: Analyzing trace with hash 2066791, now seen corresponding path program 1 times [2023-11-19 04:58:26,924 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 04:58:26,924 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [37748580] [2023-11-19 04:58:26,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:58:26,925 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:58:27,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:58:27,205 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 04:58:27,205 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 04:58:27,206 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [37748580] [2023-11-19 04:58:27,207 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [37748580] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 04:58:27,207 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 04:58:27,207 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-19 04:58:27,209 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1385374261] [2023-11-19 04:58:27,211 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 04:58:27,216 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 04:58:27,228 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 04:58:27,293 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 04:58:27,294 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 04:58:27,297 INFO L87 Difference]: Start difference. First operand has 16 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 15 states have internal predecessors, (17), 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 3 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 2 states have internal predecessors, (4), 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) [2023-11-19 04:58:27,389 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 04:58:27,390 INFO L93 Difference]: Finished difference Result 39 states and 45 transitions. [2023-11-19 04:58:27,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 04:58:27,393 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 2 states have internal predecessors, (4), 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 4 [2023-11-19 04:58:27,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 04:58:27,403 INFO L225 Difference]: With dead ends: 39 [2023-11-19 04:58:27,403 INFO L226 Difference]: Without dead ends: 23 [2023-11-19 04:58:27,407 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 04:58:27,412 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 7 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 20 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-19 04:58:27,413 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 20 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-19 04:58:27,436 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2023-11-19 04:58:27,453 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 21. [2023-11-19 04:58:27,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 20 states have internal predecessors, (25), 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) [2023-11-19 04:58:27,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 25 transitions. [2023-11-19 04:58:27,458 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 25 transitions. Word has length 4 [2023-11-19 04:58:27,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 04:58:27,458 INFO L495 AbstractCegarLoop]: Abstraction has 21 states and 25 transitions. [2023-11-19 04:58:27,459 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 2 states have internal predecessors, (4), 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) [2023-11-19 04:58:27,459 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 25 transitions. [2023-11-19 04:58:27,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2023-11-19 04:58:27,460 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 04:58:27,460 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2023-11-19 04:58:27,461 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-19 04:58:27,461 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2023-11-19 04:58:27,462 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 04:58:27,463 INFO L85 PathProgramCache]: Analyzing trace with hash 2066599, now seen corresponding path program 1 times [2023-11-19 04:58:27,463 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 04:58:27,464 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1560354422] [2023-11-19 04:58:27,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:58:27,464 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:58:27,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:58:27,536 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 04:58:27,536 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 04:58:27,536 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1560354422] [2023-11-19 04:58:27,537 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1560354422] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 04:58:27,537 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 04:58:27,537 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-19 04:58:27,537 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [570823067] [2023-11-19 04:58:27,538 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 04:58:27,540 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 04:58:27,541 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 04:58:27,541 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 04:58:27,542 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 04:58:27,542 INFO L87 Difference]: Start difference. First operand 21 states and 25 transitions. Second operand has 3 states, 2 states have (on average 2.0) internal successors, (4), 2 states have internal predecessors, (4), 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) [2023-11-19 04:58:27,586 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 04:58:27,586 INFO L93 Difference]: Finished difference Result 26 states and 30 transitions. [2023-11-19 04:58:27,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 04:58:27,587 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 2 states have internal predecessors, (4), 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 4 [2023-11-19 04:58:27,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 04:58:27,588 INFO L225 Difference]: With dead ends: 26 [2023-11-19 04:58:27,589 INFO L226 Difference]: Without dead ends: 24 [2023-11-19 04:58:27,590 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 04:58:27,592 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 9 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 11 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-19 04:58:27,593 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 11 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-19 04:58:27,594 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2023-11-19 04:58:27,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 19. [2023-11-19 04:58:27,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 15 states have (on average 1.4666666666666666) internal successors, (22), 18 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) [2023-11-19 04:58:27,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 22 transitions. [2023-11-19 04:58:27,600 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 22 transitions. Word has length 4 [2023-11-19 04:58:27,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 04:58:27,600 INFO L495 AbstractCegarLoop]: Abstraction has 19 states and 22 transitions. [2023-11-19 04:58:27,600 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 2 states have internal predecessors, (4), 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) [2023-11-19 04:58:27,601 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 22 transitions. [2023-11-19 04:58:27,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2023-11-19 04:58:27,601 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 04:58:27,601 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2023-11-19 04:58:27,602 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-19 04:58:27,602 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2023-11-19 04:58:27,603 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 04:58:27,603 INFO L85 PathProgramCache]: Analyzing trace with hash 64064617, now seen corresponding path program 1 times [2023-11-19 04:58:27,603 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 04:58:27,604 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [649720167] [2023-11-19 04:58:27,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:58:27,608 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:58:27,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:58:27,686 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 04:58:27,687 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 04:58:27,687 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [649720167] [2023-11-19 04:58:27,687 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [649720167] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 04:58:27,687 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 04:58:27,688 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-19 04:58:27,689 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [794891907] [2023-11-19 04:58:27,689 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 04:58:27,690 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 04:58:27,691 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 04:58:27,692 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 04:58:27,693 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 04:58:27,693 INFO L87 Difference]: Start difference. First operand 19 states and 22 transitions. Second operand has 3 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 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) [2023-11-19 04:58:27,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 04:58:27,735 INFO L93 Difference]: Finished difference Result 20 states and 22 transitions. [2023-11-19 04:58:27,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 04:58:27,737 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 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 5 [2023-11-19 04:58:27,737 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 04:58:27,738 INFO L225 Difference]: With dead ends: 20 [2023-11-19 04:58:27,738 INFO L226 Difference]: Without dead ends: 19 [2023-11-19 04:58:27,738 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 04:58:27,742 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 0 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-19 04:58:27,744 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 16 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-19 04:58:27,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2023-11-19 04:58:27,749 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2023-11-19 04:58:27,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 15 states have (on average 1.4) internal successors, (21), 18 states have internal predecessors, (21), 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) [2023-11-19 04:58:27,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 21 transitions. [2023-11-19 04:58:27,751 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 21 transitions. Word has length 5 [2023-11-19 04:58:27,751 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 04:58:27,751 INFO L495 AbstractCegarLoop]: Abstraction has 19 states and 21 transitions. [2023-11-19 04:58:27,751 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 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) [2023-11-19 04:58:27,751 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 21 transitions. [2023-11-19 04:58:27,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2023-11-19 04:58:27,752 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 04:58:27,752 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2023-11-19 04:58:27,752 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-19 04:58:27,753 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2023-11-19 04:58:27,753 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 04:58:27,753 INFO L85 PathProgramCache]: Analyzing trace with hash 1986003184, now seen corresponding path program 1 times [2023-11-19 04:58:27,754 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 04:58:27,754 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1461990417] [2023-11-19 04:58:27,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:58:27,754 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:58:27,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:58:27,834 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 04:58:27,835 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 04:58:27,835 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1461990417] [2023-11-19 04:58:27,835 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1461990417] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 04:58:27,835 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 04:58:27,835 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-19 04:58:27,836 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1438275097] [2023-11-19 04:58:27,836 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 04:58:27,836 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 04:58:27,836 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 04:58:27,837 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 04:58:27,837 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 04:58:27,838 INFO L87 Difference]: Start difference. First operand 19 states and 21 transitions. Second operand has 3 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 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) [2023-11-19 04:58:27,864 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 04:58:27,864 INFO L93 Difference]: Finished difference Result 19 states and 21 transitions. [2023-11-19 04:58:27,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 04:58:27,865 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 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 6 [2023-11-19 04:58:27,865 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 04:58:27,866 INFO L225 Difference]: With dead ends: 19 [2023-11-19 04:58:27,866 INFO L226 Difference]: Without dead ends: 18 [2023-11-19 04:58:27,866 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 04:58:27,868 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 7 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 7 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-19 04:58:27,869 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 7 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-19 04:58:27,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2023-11-19 04:58:27,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2023-11-19 04:58:27,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 15 states have (on average 1.2666666666666666) internal successors, (19), 17 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) [2023-11-19 04:58:27,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 19 transitions. [2023-11-19 04:58:27,875 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 19 transitions. Word has length 6 [2023-11-19 04:58:27,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 04:58:27,875 INFO L495 AbstractCegarLoop]: Abstraction has 18 states and 19 transitions. [2023-11-19 04:58:27,876 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 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) [2023-11-19 04:58:27,876 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 19 transitions. [2023-11-19 04:58:27,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2023-11-19 04:58:27,881 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 04:58:27,881 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 04:58:27,881 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-19 04:58:27,882 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2023-11-19 04:58:27,882 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 04:58:27,882 INFO L85 PathProgramCache]: Analyzing trace with hash 578676022, now seen corresponding path program 1 times [2023-11-19 04:58:27,884 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 04:58:27,884 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1383526761] [2023-11-19 04:58:27,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:58:27,884 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:58:27,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:58:27,980 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 04:58:27,981 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 04:58:27,981 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1383526761] [2023-11-19 04:58:27,981 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1383526761] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 04:58:27,981 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1592453561] [2023-11-19 04:58:27,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:58:27,982 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 04:58:27,982 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_825feb88-0cf0-41a2-b2f7-7d4d1dd48149/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 04:58:27,984 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_825feb88-0cf0-41a2-b2f7-7d4d1dd48149/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 04:58:28,022 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_825feb88-0cf0-41a2-b2f7-7d4d1dd48149/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-19 04:58:28,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:58:28,051 INFO L262 TraceCheckSpWp]: Trace formula consists of 20 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-19 04:58:28,055 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 04:58:28,162 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 04:58:28,163 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 04:58:28,235 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 04:58:28,237 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1592453561] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 04:58:28,237 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [522781040] [2023-11-19 04:58:28,267 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2023-11-19 04:58:28,268 INFO L166 IcfgInterpreter]: Building call graph [2023-11-19 04:58:28,273 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-19 04:58:28,280 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-19 04:58:28,280 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-19 04:58:28,640 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-19 04:58:28,792 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '298#(and (<= |ULTIMATE.start_main_~x~0#1| 2147483647) (<= 2147483649 |ULTIMATE.start_main_~y~0#1|) (<= 51 |ULTIMATE.start_main_~x~0#1|))' at error location [2023-11-19 04:58:28,792 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-19 04:58:28,793 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 04:58:28,793 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 2, 2] total 7 [2023-11-19 04:58:28,793 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1427193553] [2023-11-19 04:58:28,794 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 04:58:28,794 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-19 04:58:28,794 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 04:58:28,795 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-19 04:58:28,796 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2023-11-19 04:58:28,796 INFO L87 Difference]: Start difference. First operand 18 states and 19 transitions. Second operand has 8 states, 8 states have (on average 4.125) internal successors, (33), 7 states have internal predecessors, (33), 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) [2023-11-19 04:58:28,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 04:58:28,916 INFO L93 Difference]: Finished difference Result 34 states and 40 transitions. [2023-11-19 04:58:28,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-19 04:58:28,917 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.125) internal successors, (33), 7 states have internal predecessors, (33), 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 11 [2023-11-19 04:58:28,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 04:58:28,919 INFO L225 Difference]: With dead ends: 34 [2023-11-19 04:58:28,919 INFO L226 Difference]: Without dead ends: 23 [2023-11-19 04:58:28,922 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=73, Invalid=233, Unknown=0, NotChecked=0, Total=306 [2023-11-19 04:58:28,927 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 14 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 5 SdHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-19 04:58:28,927 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 5 Invalid, 46 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-19 04:58:28,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2023-11-19 04:58:28,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2023-11-19 04:58:28,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 21 states have (on average 1.1428571428571428) internal successors, (24), 22 states have internal predecessors, (24), 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) [2023-11-19 04:58:28,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 24 transitions. [2023-11-19 04:58:28,942 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 24 transitions. Word has length 11 [2023-11-19 04:58:28,943 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 04:58:28,943 INFO L495 AbstractCegarLoop]: Abstraction has 23 states and 24 transitions. [2023-11-19 04:58:28,944 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.125) internal successors, (33), 7 states have internal predecessors, (33), 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) [2023-11-19 04:58:28,944 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 24 transitions. [2023-11-19 04:58:28,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2023-11-19 04:58:28,945 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 04:58:28,945 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1] [2023-11-19 04:58:28,967 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_825feb88-0cf0-41a2-b2f7-7d4d1dd48149/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-11-19 04:58:29,160 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_825feb88-0cf0-41a2-b2f7-7d4d1dd48149/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 04:58:29,161 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2023-11-19 04:58:29,162 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 04:58:29,162 INFO L85 PathProgramCache]: Analyzing trace with hash -358707657, now seen corresponding path program 1 times [2023-11-19 04:58:29,162 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 04:58:29,162 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [787248946] [2023-11-19 04:58:29,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:58:29,163 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:58:29,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:58:29,253 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 04:58:29,254 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 04:58:29,254 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [787248946] [2023-11-19 04:58:29,254 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [787248946] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 04:58:29,255 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [317711343] [2023-11-19 04:58:29,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:58:29,257 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 04:58:29,257 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_825feb88-0cf0-41a2-b2f7-7d4d1dd48149/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 04:58:29,259 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_825feb88-0cf0-41a2-b2f7-7d4d1dd48149/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 04:58:29,265 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_825feb88-0cf0-41a2-b2f7-7d4d1dd48149/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-19 04:58:29,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:58:29,306 INFO L262 TraceCheckSpWp]: Trace formula consists of 30 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-19 04:58:29,308 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 04:58:29,351 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 04:58:29,351 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 04:58:29,401 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 04:58:29,401 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [317711343] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 04:58:29,401 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1179285873] [2023-11-19 04:58:29,404 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2023-11-19 04:58:29,404 INFO L166 IcfgInterpreter]: Building call graph [2023-11-19 04:58:29,404 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-19 04:58:29,405 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-19 04:58:29,405 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-19 04:58:29,517 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-19 04:58:29,668 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '480#(and (<= 2147483647 |ULTIMATE.start_main_~y~0#1|) (<= |ULTIMATE.start_main_~x~0#1| 50) (<= 1 |ULTIMATE.start_main_~x~0#1|))' at error location [2023-11-19 04:58:29,668 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-19 04:58:29,668 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 04:58:29,669 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-11-19 04:58:29,669 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1499180215] [2023-11-19 04:58:29,669 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 04:58:29,670 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-19 04:58:29,670 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 04:58:29,671 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-19 04:58:29,671 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2023-11-19 04:58:29,672 INFO L87 Difference]: Start difference. First operand 23 states and 24 transitions. Second operand has 8 states, 7 states have (on average 4.857142857142857) internal successors, (34), 7 states have internal predecessors, (34), 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) [2023-11-19 04:58:29,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 04:58:29,744 INFO L93 Difference]: Finished difference Result 78 states and 90 transitions. [2023-11-19 04:58:29,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-19 04:58:29,745 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 4.857142857142857) internal successors, (34), 7 states have internal predecessors, (34), 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 17 [2023-11-19 04:58:29,745 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 04:58:29,747 INFO L225 Difference]: With dead ends: 78 [2023-11-19 04:58:29,747 INFO L226 Difference]: Without dead ends: 77 [2023-11-19 04:58:29,748 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 38 SyntacticMatches, 3 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2023-11-19 04:58:29,749 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 32 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 53 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-19 04:58:29,749 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [32 Valid, 42 Invalid, 53 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-19 04:58:29,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2023-11-19 04:58:29,759 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 67. [2023-11-19 04:58:29,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 65 states have (on average 1.2307692307692308) internal successors, (80), 66 states have internal predecessors, (80), 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) [2023-11-19 04:58:29,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 80 transitions. [2023-11-19 04:58:29,761 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 80 transitions. Word has length 17 [2023-11-19 04:58:29,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 04:58:29,762 INFO L495 AbstractCegarLoop]: Abstraction has 67 states and 80 transitions. [2023-11-19 04:58:29,762 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 4.857142857142857) internal successors, (34), 7 states have internal predecessors, (34), 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) [2023-11-19 04:58:29,762 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 80 transitions. [2023-11-19 04:58:29,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2023-11-19 04:58:29,763 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 04:58:29,763 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1] [2023-11-19 04:58:29,788 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_825feb88-0cf0-41a2-b2f7-7d4d1dd48149/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-11-19 04:58:29,988 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_825feb88-0cf0-41a2-b2f7-7d4d1dd48149/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2023-11-19 04:58:29,988 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr5ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2023-11-19 04:58:29,989 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 04:58:29,989 INFO L85 PathProgramCache]: Analyzing trace with hash -1114947233, now seen corresponding path program 1 times [2023-11-19 04:58:29,989 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 04:58:29,989 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [74202087] [2023-11-19 04:58:29,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:58:29,990 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:58:30,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:58:30,086 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 10 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-19 04:58:30,087 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 04:58:30,087 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [74202087] [2023-11-19 04:58:30,087 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [74202087] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 04:58:30,087 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2141442417] [2023-11-19 04:58:30,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:58:30,088 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 04:58:30,088 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_825feb88-0cf0-41a2-b2f7-7d4d1dd48149/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 04:58:30,097 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_825feb88-0cf0-41a2-b2f7-7d4d1dd48149/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 04:58:30,128 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_825feb88-0cf0-41a2-b2f7-7d4d1dd48149/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-19 04:58:30,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:58:30,142 INFO L262 TraceCheckSpWp]: Trace formula consists of 34 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-19 04:58:30,143 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 04:58:30,191 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 04:58:30,191 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 04:58:30,255 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 04:58:30,256 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2141442417] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 04:58:30,256 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1237029025] [2023-11-19 04:58:30,259 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2023-11-19 04:58:30,259 INFO L166 IcfgInterpreter]: Building call graph [2023-11-19 04:58:30,260 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-19 04:58:30,260 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-19 04:58:30,260 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-19 04:58:30,427 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-19 04:58:30,576 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '766#(<= 2147483647 |ULTIMATE.start_main_~x~0#1|)' at error location [2023-11-19 04:58:30,576 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-19 04:58:30,576 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 04:58:30,576 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2023-11-19 04:58:30,577 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1085396762] [2023-11-19 04:58:30,577 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 04:58:30,578 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-19 04:58:30,578 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 04:58:30,579 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-19 04:58:30,579 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=197, Unknown=0, NotChecked=0, Total=272 [2023-11-19 04:58:30,579 INFO L87 Difference]: Start difference. First operand 67 states and 80 transitions. Second operand has 10 states, 9 states have (on average 6.222222222222222) internal successors, (56), 10 states have internal predecessors, (56), 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) [2023-11-19 04:58:30,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 04:58:30,637 INFO L93 Difference]: Finished difference Result 159 states and 200 transitions. [2023-11-19 04:58:30,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-19 04:58:30,638 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 6.222222222222222) internal successors, (56), 10 states have internal predecessors, (56), 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 [2023-11-19 04:58:30,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 04:58:30,641 INFO L225 Difference]: With dead ends: 159 [2023-11-19 04:58:30,641 INFO L226 Difference]: Without dead ends: 105 [2023-11-19 04:58:30,642 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 41 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 131 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=75, Invalid=197, Unknown=0, NotChecked=0, Total=272 [2023-11-19 04:58:30,643 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 12 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-19 04:58:30,644 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 35 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-19 04:58:30,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2023-11-19 04:58:30,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 105. [2023-11-19 04:58:30,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 103 states have (on average 1.145631067961165) internal successors, (118), 104 states have internal predecessors, (118), 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) [2023-11-19 04:58:30,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 118 transitions. [2023-11-19 04:58:30,670 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 118 transitions. Word has length 19 [2023-11-19 04:58:30,670 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 04:58:30,670 INFO L495 AbstractCegarLoop]: Abstraction has 105 states and 118 transitions. [2023-11-19 04:58:30,671 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 6.222222222222222) internal successors, (56), 10 states have internal predecessors, (56), 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) [2023-11-19 04:58:30,671 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 118 transitions. [2023-11-19 04:58:30,672 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2023-11-19 04:58:30,673 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 04:58:30,673 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 6, 6, 6, 1, 1] [2023-11-19 04:58:30,700 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_825feb88-0cf0-41a2-b2f7-7d4d1dd48149/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-19 04:58:30,873 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_825feb88-0cf0-41a2-b2f7-7d4d1dd48149/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 04:58:30,874 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2023-11-19 04:58:30,874 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 04:58:30,874 INFO L85 PathProgramCache]: Analyzing trace with hash -1789312301, now seen corresponding path program 2 times [2023-11-19 04:58:30,875 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 04:58:30,875 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [461549476] [2023-11-19 04:58:30,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:58:30,875 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:58:30,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:58:31,118 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 114 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 04:58:31,119 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 04:58:31,119 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [461549476] [2023-11-19 04:58:31,119 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [461549476] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 04:58:31,119 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1732684281] [2023-11-19 04:58:31,119 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-19 04:58:31,120 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 04:58:31,120 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_825feb88-0cf0-41a2-b2f7-7d4d1dd48149/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 04:58:31,121 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_825feb88-0cf0-41a2-b2f7-7d4d1dd48149/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 04:58:31,123 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_825feb88-0cf0-41a2-b2f7-7d4d1dd48149/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-19 04:58:31,173 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2023-11-19 04:58:31,173 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-19 04:58:31,174 INFO L262 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-19 04:58:31,176 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 04:58:31,239 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 114 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 04:58:31,239 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 04:58:31,419 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 114 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 04:58:31,420 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1732684281] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 04:58:31,420 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [192963865] [2023-11-19 04:58:31,440 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2023-11-19 04:58:31,440 INFO L166 IcfgInterpreter]: Building call graph [2023-11-19 04:58:31,441 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-19 04:58:31,441 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-19 04:58:31,441 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-19 04:58:31,544 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-19 04:58:31,732 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1332#(and (<= 2147483647 |ULTIMATE.start_main_~y~0#1|) (<= |ULTIMATE.start_main_~x~0#1| 50) (<= 1 |ULTIMATE.start_main_~x~0#1|))' at error location [2023-11-19 04:58:31,732 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-19 04:58:31,732 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 04:58:31,732 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 14 [2023-11-19 04:58:31,732 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1704812228] [2023-11-19 04:58:31,733 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 04:58:31,733 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-11-19 04:58:31,733 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 04:58:31,734 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-11-19 04:58:31,735 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=285, Unknown=0, NotChecked=0, Total=420 [2023-11-19 04:58:31,735 INFO L87 Difference]: Start difference. First operand 105 states and 118 transitions. Second operand has 16 states, 15 states have (on average 5.466666666666667) internal successors, (82), 15 states have internal predecessors, (82), 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) [2023-11-19 04:58:31,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 04:58:31,931 INFO L93 Difference]: Finished difference Result 562 states and 655 transitions. [2023-11-19 04:58:31,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-11-19 04:58:31,932 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 5.466666666666667) internal successors, (82), 15 states have internal predecessors, (82), 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 41 [2023-11-19 04:58:31,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 04:58:31,936 INFO L225 Difference]: With dead ends: 562 [2023-11-19 04:58:31,937 INFO L226 Difference]: Without dead ends: 561 [2023-11-19 04:58:31,938 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 102 SyntacticMatches, 7 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 232 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=135, Invalid=285, Unknown=0, NotChecked=0, Total=420 [2023-11-19 04:58:31,939 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 84 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 89 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 76 SdHoareTripleChecker+Invalid, 124 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 89 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-19 04:58:31,939 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [84 Valid, 76 Invalid, 124 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 89 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-19 04:58:31,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 561 states. [2023-11-19 04:58:31,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 561 to 369. [2023-11-19 04:58:31,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 369 states, 367 states have (on average 1.1634877384196185) internal successors, (427), 368 states have internal predecessors, (427), 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) [2023-11-19 04:58:32,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 369 states to 369 states and 427 transitions. [2023-11-19 04:58:32,004 INFO L78 Accepts]: Start accepts. Automaton has 369 states and 427 transitions. Word has length 41 [2023-11-19 04:58:32,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 04:58:32,004 INFO L495 AbstractCegarLoop]: Abstraction has 369 states and 427 transitions. [2023-11-19 04:58:32,005 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 5.466666666666667) internal successors, (82), 15 states have internal predecessors, (82), 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) [2023-11-19 04:58:32,005 INFO L276 IsEmpty]: Start isEmpty. Operand 369 states and 427 transitions. [2023-11-19 04:58:32,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2023-11-19 04:58:32,016 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 04:58:32,016 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 8, 5, 5, 5, 4, 4, 4, 1, 1] [2023-11-19 04:58:32,036 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_825feb88-0cf0-41a2-b2f7-7d4d1dd48149/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-19 04:58:32,232 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_825feb88-0cf0-41a2-b2f7-7d4d1dd48149/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 04:58:32,233 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr5ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2023-11-19 04:58:32,233 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 04:58:32,233 INFO L85 PathProgramCache]: Analyzing trace with hash -419532703, now seen corresponding path program 2 times [2023-11-19 04:58:32,233 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 04:58:32,234 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [739916308] [2023-11-19 04:58:32,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:58:32,235 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:58:32,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:58:32,364 INFO L134 CoverageAnalysis]: Checked inductivity of 176 backedges. 80 proven. 44 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2023-11-19 04:58:32,365 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 04:58:32,365 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [739916308] [2023-11-19 04:58:32,365 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [739916308] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 04:58:32,365 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1325282180] [2023-11-19 04:58:32,366 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-19 04:58:32,366 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 04:58:32,366 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_825feb88-0cf0-41a2-b2f7-7d4d1dd48149/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 04:58:32,369 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_825feb88-0cf0-41a2-b2f7-7d4d1dd48149/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 04:58:32,392 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_825feb88-0cf0-41a2-b2f7-7d4d1dd48149/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-19 04:58:32,427 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2023-11-19 04:58:32,428 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-19 04:58:32,428 INFO L262 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-19 04:58:32,431 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 04:58:32,474 INFO L134 CoverageAnalysis]: Checked inductivity of 176 backedges. 80 proven. 44 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2023-11-19 04:58:32,475 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 04:58:32,579 INFO L134 CoverageAnalysis]: Checked inductivity of 176 backedges. 80 proven. 44 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2023-11-19 04:58:32,580 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1325282180] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 04:58:32,580 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [787808306] [2023-11-19 04:58:32,582 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2023-11-19 04:58:32,583 INFO L166 IcfgInterpreter]: Building call graph [2023-11-19 04:58:32,583 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-19 04:58:32,583 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-19 04:58:32,583 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-19 04:58:32,747 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-19 04:58:32,937 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2745#(<= 2147483647 |ULTIMATE.start_main_~x~0#1|)' at error location [2023-11-19 04:58:32,937 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-19 04:58:32,938 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 04:58:32,938 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 11 [2023-11-19 04:58:32,938 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [527140700] [2023-11-19 04:58:32,938 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 04:58:32,940 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-19 04:58:32,940 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 04:58:32,941 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-19 04:58:32,942 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=250, Unknown=0, NotChecked=0, Total=342 [2023-11-19 04:58:32,942 INFO L87 Difference]: Start difference. First operand 369 states and 427 transitions. Second operand has 12 states, 12 states have (on average 5.083333333333333) internal successors, (61), 11 states have internal predecessors, (61), 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) [2023-11-19 04:58:33,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 04:58:33,022 INFO L93 Difference]: Finished difference Result 595 states and 690 transitions. [2023-11-19 04:58:33,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-19 04:58:33,023 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 5.083333333333333) internal successors, (61), 11 states have internal predecessors, (61), 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 [2023-11-19 04:58:33,023 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 04:58:33,025 INFO L225 Difference]: With dead ends: 595 [2023-11-19 04:58:33,025 INFO L226 Difference]: Without dead ends: 247 [2023-11-19 04:58:33,032 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 148 SyntacticMatches, 4 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 153 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=92, Invalid=250, Unknown=0, NotChecked=0, Total=342 [2023-11-19 04:58:33,035 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 9 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 45 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-19 04:58:33,036 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 50 Invalid, 45 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-19 04:58:33,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 247 states. [2023-11-19 04:58:33,053 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 247 to 247. [2023-11-19 04:58:33,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 247 states, 245 states have (on average 1.1346938775510205) internal successors, (278), 246 states have internal predecessors, (278), 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) [2023-11-19 04:58:33,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 247 states to 247 states and 278 transitions. [2023-11-19 04:58:33,056 INFO L78 Accepts]: Start accepts. Automaton has 247 states and 278 transitions. Word has length 55 [2023-11-19 04:58:33,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 04:58:33,058 INFO L495 AbstractCegarLoop]: Abstraction has 247 states and 278 transitions. [2023-11-19 04:58:33,058 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 5.083333333333333) internal successors, (61), 11 states have internal predecessors, (61), 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) [2023-11-19 04:58:33,058 INFO L276 IsEmpty]: Start isEmpty. Operand 247 states and 278 transitions. [2023-11-19 04:58:33,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2023-11-19 04:58:33,062 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 04:58:33,062 INFO L195 NwaCegarLoop]: trace histogram [15, 15, 15, 14, 14, 14, 1, 1] [2023-11-19 04:58:33,091 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_825feb88-0cf0-41a2-b2f7-7d4d1dd48149/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-19 04:58:33,285 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_825feb88-0cf0-41a2-b2f7-7d4d1dd48149/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 04:58:33,286 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2023-11-19 04:58:33,286 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 04:58:33,286 INFO L85 PathProgramCache]: Analyzing trace with hash -1132236789, now seen corresponding path program 3 times [2023-11-19 04:58:33,287 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 04:58:33,287 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [396837625] [2023-11-19 04:58:33,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:58:33,287 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:58:33,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:58:33,788 INFO L134 CoverageAnalysis]: Checked inductivity of 602 backedges. 0 proven. 602 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 04:58:33,788 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 04:58:33,789 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [396837625] [2023-11-19 04:58:33,789 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [396837625] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 04:58:33,789 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1930572405] [2023-11-19 04:58:33,789 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-19 04:58:33,790 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 04:58:33,790 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_825feb88-0cf0-41a2-b2f7-7d4d1dd48149/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 04:58:33,791 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_825feb88-0cf0-41a2-b2f7-7d4d1dd48149/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 04:58:33,822 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_825feb88-0cf0-41a2-b2f7-7d4d1dd48149/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-19 04:58:33,871 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-19 04:58:33,871 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-19 04:58:33,872 INFO L262 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 16 conjunts are in the unsatisfiable core [2023-11-19 04:58:33,876 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 04:58:34,020 INFO L134 CoverageAnalysis]: Checked inductivity of 602 backedges. 0 proven. 602 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 04:58:34,020 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 04:58:34,621 INFO L134 CoverageAnalysis]: Checked inductivity of 602 backedges. 0 proven. 602 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 04:58:34,621 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1930572405] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 04:58:34,621 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [143681475] [2023-11-19 04:58:34,625 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2023-11-19 04:58:34,625 INFO L166 IcfgInterpreter]: Building call graph [2023-11-19 04:58:34,625 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-19 04:58:34,625 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-19 04:58:34,626 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-19 04:58:34,705 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-19 04:58:35,144 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '4286#(and (<= 2147483647 |ULTIMATE.start_main_~y~0#1|) (<= |ULTIMATE.start_main_~x~0#1| 50) (<= 1 |ULTIMATE.start_main_~x~0#1|))' at error location [2023-11-19 04:58:35,144 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-19 04:58:35,144 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 04:58:35,144 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 30 [2023-11-19 04:58:35,145 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [93392350] [2023-11-19 04:58:35,145 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 04:58:35,145 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2023-11-19 04:58:35,146 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 04:58:35,147 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2023-11-19 04:58:35,147 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=511, Invalid=821, Unknown=0, NotChecked=0, Total=1332 [2023-11-19 04:58:35,148 INFO L87 Difference]: Start difference. First operand 247 states and 278 transitions. Second operand has 32 states, 31 states have (on average 5.741935483870968) internal successors, (178), 31 states have internal predecessors, (178), 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) [2023-11-19 04:58:35,524 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 04:58:35,525 INFO L93 Difference]: Finished difference Result 2228 states and 2599 transitions. [2023-11-19 04:58:35,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2023-11-19 04:58:35,526 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 31 states have (on average 5.741935483870968) internal successors, (178), 31 states have internal predecessors, (178), 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 89 [2023-11-19 04:58:35,527 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 04:58:35,545 INFO L225 Difference]: With dead ends: 2228 [2023-11-19 04:58:35,545 INFO L226 Difference]: Without dead ends: 2227 [2023-11-19 04:58:35,546 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 280 GetRequests, 230 SyntacticMatches, 15 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 864 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=511, Invalid=821, Unknown=0, NotChecked=0, Total=1332 [2023-11-19 04:58:35,548 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 183 mSDsluCounter, 158 mSDsCounter, 0 mSdLazyCounter, 198 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 183 SdHoareTripleChecker+Valid, 181 SdHoareTripleChecker+Invalid, 262 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 198 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-19 04:58:35,549 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [183 Valid, 181 Invalid, 262 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 198 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-19 04:58:35,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2227 states. [2023-11-19 04:58:35,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2227 to 949. [2023-11-19 04:58:35,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 949 states, 947 states have (on average 1.1647307286166844) internal successors, (1103), 948 states have internal predecessors, (1103), 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) [2023-11-19 04:58:35,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 949 states to 949 states and 1103 transitions. [2023-11-19 04:58:35,629 INFO L78 Accepts]: Start accepts. Automaton has 949 states and 1103 transitions. Word has length 89 [2023-11-19 04:58:35,631 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 04:58:35,631 INFO L495 AbstractCegarLoop]: Abstraction has 949 states and 1103 transitions. [2023-11-19 04:58:35,632 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 31 states have (on average 5.741935483870968) internal successors, (178), 31 states have internal predecessors, (178), 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) [2023-11-19 04:58:35,632 INFO L276 IsEmpty]: Start isEmpty. Operand 949 states and 1103 transitions. [2023-11-19 04:58:35,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2023-11-19 04:58:35,634 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 04:58:35,634 INFO L195 NwaCegarLoop]: trace histogram [15, 15, 14, 10, 10, 10, 5, 5, 5, 1, 1] [2023-11-19 04:58:35,665 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_825feb88-0cf0-41a2-b2f7-7d4d1dd48149/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-19 04:58:35,848 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_825feb88-0cf0-41a2-b2f7-7d4d1dd48149/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-11-19 04:58:35,849 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr5ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2023-11-19 04:58:35,849 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 04:58:35,849 INFO L85 PathProgramCache]: Analyzing trace with hash -947455925, now seen corresponding path program 3 times [2023-11-19 04:58:35,849 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 04:58:35,850 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [561679212] [2023-11-19 04:58:35,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:58:35,850 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:58:35,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:58:36,139 INFO L134 CoverageAnalysis]: Checked inductivity of 530 backedges. 188 proven. 290 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2023-11-19 04:58:36,139 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 04:58:36,139 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [561679212] [2023-11-19 04:58:36,140 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [561679212] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 04:58:36,140 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1905598509] [2023-11-19 04:58:36,140 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-19 04:58:36,140 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 04:58:36,140 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_825feb88-0cf0-41a2-b2f7-7d4d1dd48149/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 04:58:36,142 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_825feb88-0cf0-41a2-b2f7-7d4d1dd48149/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 04:58:36,149 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_825feb88-0cf0-41a2-b2f7-7d4d1dd48149/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-19 04:58:36,213 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-19 04:58:36,213 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-19 04:58:36,214 INFO L262 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-19 04:58:36,218 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 04:58:36,314 INFO L134 CoverageAnalysis]: Checked inductivity of 530 backedges. 188 proven. 290 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2023-11-19 04:58:36,315 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 04:58:36,653 INFO L134 CoverageAnalysis]: Checked inductivity of 530 backedges. 188 proven. 290 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2023-11-19 04:58:36,653 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1905598509] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 04:58:36,654 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [116620646] [2023-11-19 04:58:36,656 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2023-11-19 04:58:36,656 INFO L166 IcfgInterpreter]: Building call graph [2023-11-19 04:58:36,656 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-19 04:58:36,656 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-19 04:58:36,656 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-19 04:58:36,740 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-19 04:58:37,064 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '8512#(<= 2147483647 |ULTIMATE.start_main_~x~0#1|)' at error location [2023-11-19 04:58:37,065 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-19 04:58:37,065 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 04:58:37,065 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 23 [2023-11-19 04:58:37,065 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [67763481] [2023-11-19 04:58:37,066 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 04:58:37,066 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-11-19 04:58:37,066 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 04:58:37,067 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-11-19 04:58:37,068 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=302, Invalid=628, Unknown=0, NotChecked=0, Total=930 [2023-11-19 04:58:37,068 INFO L87 Difference]: Start difference. First operand 949 states and 1103 transitions. Second operand has 24 states, 24 states have (on average 5.541666666666667) internal successors, (133), 23 states have internal predecessors, (133), 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) [2023-11-19 04:58:37,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 04:58:37,207 INFO L93 Difference]: Finished difference Result 1483 states and 1728 transitions. [2023-11-19 04:58:37,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-11-19 04:58:37,208 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 5.541666666666667) internal successors, (133), 23 states have internal predecessors, (133), 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 91 [2023-11-19 04:58:37,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 04:58:37,212 INFO L225 Difference]: With dead ends: 1483 [2023-11-19 04:58:37,212 INFO L226 Difference]: Without dead ends: 591 [2023-11-19 04:58:37,214 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 283 GetRequests, 244 SyntacticMatches, 10 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 543 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=302, Invalid=628, Unknown=0, NotChecked=0, Total=930 [2023-11-19 04:58:37,214 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 9 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 83 SdHoareTripleChecker+Invalid, 77 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 75 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-19 04:58:37,215 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 83 Invalid, 77 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 75 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-19 04:58:37,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 591 states. [2023-11-19 04:58:37,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 591 to 591. [2023-11-19 04:58:37,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 591 states, 589 states have (on average 1.137521222410866) internal successors, (670), 590 states have internal predecessors, (670), 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) [2023-11-19 04:58:37,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 591 states to 591 states and 670 transitions. [2023-11-19 04:58:37,244 INFO L78 Accepts]: Start accepts. Automaton has 591 states and 670 transitions. Word has length 91 [2023-11-19 04:58:37,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 04:58:37,245 INFO L495 AbstractCegarLoop]: Abstraction has 591 states and 670 transitions. [2023-11-19 04:58:37,245 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 5.541666666666667) internal successors, (133), 23 states have internal predecessors, (133), 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) [2023-11-19 04:58:37,246 INFO L276 IsEmpty]: Start isEmpty. Operand 591 states and 670 transitions. [2023-11-19 04:58:37,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2023-11-19 04:58:37,247 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 04:58:37,248 INFO L195 NwaCegarLoop]: trace histogram [27, 27, 26, 22, 22, 22, 5, 5, 5, 1, 1] [2023-11-19 04:58:37,273 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_825feb88-0cf0-41a2-b2f7-7d4d1dd48149/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2023-11-19 04:58:37,464 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_825feb88-0cf0-41a2-b2f7-7d4d1dd48149/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-11-19 04:58:37,465 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr5ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2023-11-19 04:58:37,465 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 04:58:37,466 INFO L85 PathProgramCache]: Analyzing trace with hash 1278869791, now seen corresponding path program 4 times [2023-11-19 04:58:37,466 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 04:58:37,466 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1078992522] [2023-11-19 04:58:37,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:58:37,466 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:58:37,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:58:38,290 INFO L134 CoverageAnalysis]: Checked inductivity of 1886 backedges. 404 proven. 1430 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2023-11-19 04:58:38,290 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 04:58:38,291 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1078992522] [2023-11-19 04:58:38,291 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1078992522] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 04:58:38,291 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1295253360] [2023-11-19 04:58:38,291 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-19 04:58:38,291 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 04:58:38,291 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_825feb88-0cf0-41a2-b2f7-7d4d1dd48149/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 04:58:38,305 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_825feb88-0cf0-41a2-b2f7-7d4d1dd48149/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 04:58:38,328 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_825feb88-0cf0-41a2-b2f7-7d4d1dd48149/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-19 04:58:38,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:58:38,392 INFO L262 TraceCheckSpWp]: Trace formula consists of 274 conjuncts, 24 conjunts are in the unsatisfiable core [2023-11-19 04:58:38,403 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 04:58:38,567 INFO L134 CoverageAnalysis]: Checked inductivity of 1886 backedges. 404 proven. 1430 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2023-11-19 04:58:38,567 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 04:58:39,686 INFO L134 CoverageAnalysis]: Checked inductivity of 1886 backedges. 404 proven. 1430 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2023-11-19 04:58:39,686 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1295253360] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 04:58:39,686 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [895175216] [2023-11-19 04:58:39,689 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2023-11-19 04:58:39,689 INFO L166 IcfgInterpreter]: Building call graph [2023-11-19 04:58:39,689 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-19 04:58:39,689 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-19 04:58:39,689 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-19 04:58:39,822 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-19 04:58:40,574 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '11929#(<= 2147483647 |ULTIMATE.start_main_~x~0#1|)' at error location [2023-11-19 04:58:40,574 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-19 04:58:40,574 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 04:58:40,575 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24, 24] total 47 [2023-11-19 04:58:40,575 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1283845422] [2023-11-19 04:58:40,575 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 04:58:40,576 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2023-11-19 04:58:40,576 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 04:58:40,578 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2023-11-19 04:58:40,580 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1154, Invalid=1816, Unknown=0, NotChecked=0, Total=2970 [2023-11-19 04:58:40,580 INFO L87 Difference]: Start difference. First operand 591 states and 670 transitions. Second operand has 48 states, 48 states have (on average 5.770833333333333) internal successors, (277), 47 states have internal predecessors, (277), 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) [2023-11-19 04:58:40,830 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 04:58:40,830 INFO L93 Difference]: Finished difference Result 786 states and 894 transitions. [2023-11-19 04:58:40,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2023-11-19 04:58:40,831 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 5.770833333333333) internal successors, (277), 47 states have internal predecessors, (277), 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 163 [2023-11-19 04:58:40,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 04:58:40,833 INFO L225 Difference]: With dead ends: 786 [2023-11-19 04:58:40,833 INFO L226 Difference]: Without dead ends: 324 [2023-11-19 04:58:40,835 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 511 GetRequests, 436 SyntacticMatches, 22 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1971 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=1154, Invalid=1816, Unknown=0, NotChecked=0, Total=2970 [2023-11-19 04:58:40,836 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 47 mSDsluCounter, 164 mSDsCounter, 0 mSdLazyCounter, 151 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 172 SdHoareTripleChecker+Invalid, 153 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 151 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-19 04:58:40,837 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [47 Valid, 172 Invalid, 153 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 151 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-19 04:58:40,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 324 states. [2023-11-19 04:58:40,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 324 to 309. [2023-11-19 04:58:40,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 309 states, 307 states have (on average 1.0716612377850163) internal successors, (329), 308 states have internal predecessors, (329), 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) [2023-11-19 04:58:40,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 309 states to 309 states and 329 transitions. [2023-11-19 04:58:40,849 INFO L78 Accepts]: Start accepts. Automaton has 309 states and 329 transitions. Word has length 163 [2023-11-19 04:58:40,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 04:58:40,850 INFO L495 AbstractCegarLoop]: Abstraction has 309 states and 329 transitions. [2023-11-19 04:58:40,850 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 5.770833333333333) internal successors, (277), 47 states have internal predecessors, (277), 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) [2023-11-19 04:58:40,851 INFO L276 IsEmpty]: Start isEmpty. Operand 309 states and 329 transitions. [2023-11-19 04:58:40,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2023-11-19 04:58:40,852 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 04:58:40,853 INFO L195 NwaCegarLoop]: trace histogram [31, 31, 31, 30, 30, 30, 1, 1] [2023-11-19 04:58:40,880 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_825feb88-0cf0-41a2-b2f7-7d4d1dd48149/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-11-19 04:58:41,068 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_825feb88-0cf0-41a2-b2f7-7d4d1dd48149/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-11-19 04:58:41,069 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2023-11-19 04:58:41,069 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 04:58:41,069 INFO L85 PathProgramCache]: Analyzing trace with hash -1858413957, now seen corresponding path program 4 times [2023-11-19 04:58:41,069 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 04:58:41,070 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1807761440] [2023-11-19 04:58:41,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:58:41,070 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:58:41,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:58:42,295 INFO L134 CoverageAnalysis]: Checked inductivity of 2730 backedges. 0 proven. 2730 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 04:58:42,295 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 04:58:42,295 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1807761440] [2023-11-19 04:58:42,295 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1807761440] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 04:58:42,296 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [7054249] [2023-11-19 04:58:42,296 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-19 04:58:42,296 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 04:58:42,296 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_825feb88-0cf0-41a2-b2f7-7d4d1dd48149/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 04:58:42,313 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_825feb88-0cf0-41a2-b2f7-7d4d1dd48149/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 04:58:42,320 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_825feb88-0cf0-41a2-b2f7-7d4d1dd48149/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-19 04:58:42,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:58:42,395 INFO L262 TraceCheckSpWp]: Trace formula consists of 310 conjuncts, 32 conjunts are in the unsatisfiable core [2023-11-19 04:58:42,399 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 04:58:42,638 INFO L134 CoverageAnalysis]: Checked inductivity of 2730 backedges. 0 proven. 2730 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 04:58:42,639 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 04:58:44,399 INFO L134 CoverageAnalysis]: Checked inductivity of 2730 backedges. 0 proven. 2730 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 04:58:44,399 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [7054249] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 04:58:44,399 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [301641671] [2023-11-19 04:58:44,402 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2023-11-19 04:58:44,402 INFO L166 IcfgInterpreter]: Building call graph [2023-11-19 04:58:44,402 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-19 04:58:44,402 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-19 04:58:44,402 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-19 04:58:44,454 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-19 04:58:45,564 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '14370#(and (<= 2147483647 |ULTIMATE.start_main_~y~0#1|) (<= |ULTIMATE.start_main_~x~0#1| 50) (<= 1 |ULTIMATE.start_main_~x~0#1|))' at error location [2023-11-19 04:58:45,564 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-19 04:58:45,564 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 04:58:45,564 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31, 31] total 62 [2023-11-19 04:58:45,564 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [585261642] [2023-11-19 04:58:45,565 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 04:58:45,565 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 64 states [2023-11-19 04:58:45,566 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 04:58:45,567 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2023-11-19 04:58:45,569 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2031, Invalid=2661, Unknown=0, NotChecked=0, Total=4692 [2023-11-19 04:58:45,570 INFO L87 Difference]: Start difference. First operand 309 states and 329 transitions. Second operand has 64 states, 63 states have (on average 5.873015873015873) internal successors, (370), 63 states have internal predecessors, (370), 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) [2023-11-19 04:58:46,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 04:58:46,108 INFO L93 Difference]: Finished difference Result 1314 states and 1508 transitions. [2023-11-19 04:58:46,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2023-11-19 04:58:46,109 INFO L78 Accepts]: Start accepts. Automaton has has 64 states, 63 states have (on average 5.873015873015873) internal successors, (370), 63 states have internal predecessors, (370), 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 185 [2023-11-19 04:58:46,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 04:58:46,117 INFO L225 Difference]: With dead ends: 1314 [2023-11-19 04:58:46,117 INFO L226 Difference]: Without dead ends: 1313 [2023-11-19 04:58:46,122 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 584 GetRequests, 486 SyntacticMatches, 31 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3280 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=2031, Invalid=2661, Unknown=0, NotChecked=0, Total=4692 [2023-11-19 04:58:46,123 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 164 mSDsluCounter, 351 mSDsCounter, 0 mSdLazyCounter, 423 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 164 SdHoareTripleChecker+Valid, 382 SdHoareTripleChecker+Invalid, 477 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 423 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-19 04:58:46,124 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [164 Valid, 382 Invalid, 477 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 423 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-19 04:58:46,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1313 states. [2023-11-19 04:58:46,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1313 to 1279. [2023-11-19 04:58:46,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1279 states, 1277 states have (on average 1.1386061080657792) internal successors, (1454), 1278 states have internal predecessors, (1454), 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) [2023-11-19 04:58:46,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1279 states to 1279 states and 1454 transitions. [2023-11-19 04:58:46,197 INFO L78 Accepts]: Start accepts. Automaton has 1279 states and 1454 transitions. Word has length 185 [2023-11-19 04:58:46,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 04:58:46,198 INFO L495 AbstractCegarLoop]: Abstraction has 1279 states and 1454 transitions. [2023-11-19 04:58:46,198 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 64 states, 63 states have (on average 5.873015873015873) internal successors, (370), 63 states have internal predecessors, (370), 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) [2023-11-19 04:58:46,199 INFO L276 IsEmpty]: Start isEmpty. Operand 1279 states and 1454 transitions. [2023-11-19 04:58:46,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 308 [2023-11-19 04:58:46,204 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 04:58:46,204 INFO L195 NwaCegarLoop]: trace histogram [51, 51, 50, 46, 46, 46, 5, 5, 5, 1, 1] [2023-11-19 04:58:46,229 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_825feb88-0cf0-41a2-b2f7-7d4d1dd48149/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-11-19 04:58:46,424 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_825feb88-0cf0-41a2-b2f7-7d4d1dd48149/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-11-19 04:58:46,424 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr5ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2023-11-19 04:58:46,425 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 04:58:46,425 INFO L85 PathProgramCache]: Analyzing trace with hash 829290183, now seen corresponding path program 5 times [2023-11-19 04:58:46,425 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 04:58:46,425 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2070173608] [2023-11-19 04:58:46,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:58:46,425 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:58:46,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:58:49,096 INFO L134 CoverageAnalysis]: Checked inductivity of 7190 backedges. 836 proven. 6302 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2023-11-19 04:58:49,096 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 04:58:49,096 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2070173608] [2023-11-19 04:58:49,096 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2070173608] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 04:58:49,097 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2081641493] [2023-11-19 04:58:49,097 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-19 04:58:49,097 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 04:58:49,097 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_825feb88-0cf0-41a2-b2f7-7d4d1dd48149/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 04:58:49,098 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_825feb88-0cf0-41a2-b2f7-7d4d1dd48149/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 04:58:49,109 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_825feb88-0cf0-41a2-b2f7-7d4d1dd48149/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-19 04:58:49,182 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2023-11-19 04:58:49,182 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-19 04:58:49,183 INFO L262 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-19 04:58:49,187 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 04:58:49,556 INFO L134 CoverageAnalysis]: Checked inductivity of 7190 backedges. 1090 proven. 70 refuted. 0 times theorem prover too weak. 6030 trivial. 0 not checked. [2023-11-19 04:58:49,556 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 04:58:49,942 INFO L134 CoverageAnalysis]: Checked inductivity of 7190 backedges. 1090 proven. 70 refuted. 0 times theorem prover too weak. 6030 trivial. 0 not checked. [2023-11-19 04:58:49,943 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2081641493] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 04:58:49,943 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1486076639] [2023-11-19 04:58:49,945 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2023-11-19 04:58:49,946 INFO L166 IcfgInterpreter]: Building call graph [2023-11-19 04:58:49,946 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-19 04:58:49,946 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-19 04:58:49,947 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-19 04:58:50,030 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-19 04:58:52,033 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '19255#(<= 2147483647 |ULTIMATE.start_main_~x~0#1|)' at error location [2023-11-19 04:58:52,033 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-19 04:58:52,034 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 04:58:52,034 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 7, 7] total 61 [2023-11-19 04:58:52,034 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [702332673] [2023-11-19 04:58:52,034 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 04:58:52,035 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 61 states [2023-11-19 04:58:52,036 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 04:58:52,038 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2023-11-19 04:58:52,039 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1867, Invalid=2689, Unknown=0, NotChecked=0, Total=4556 [2023-11-19 04:58:52,040 INFO L87 Difference]: Start difference. First operand 1279 states and 1454 transitions. Second operand has 61 states, 61 states have (on average 5.950819672131147) internal successors, (363), 61 states have internal predecessors, (363), 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) [2023-11-19 04:58:52,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 04:58:52,469 INFO L93 Difference]: Finished difference Result 3277 states and 3958 transitions. [2023-11-19 04:58:52,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2023-11-19 04:58:52,470 INFO L78 Accepts]: Start accepts. Automaton has has 61 states, 61 states have (on average 5.950819672131147) internal successors, (363), 61 states have internal predecessors, (363), 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 307 [2023-11-19 04:58:52,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 04:58:52,484 INFO L225 Difference]: With dead ends: 3277 [2023-11-19 04:58:52,484 INFO L226 Difference]: Without dead ends: 2271 [2023-11-19 04:58:52,488 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 967 GetRequests, 855 SyntacticMatches, 46 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3720 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=1867, Invalid=2689, Unknown=0, NotChecked=0, Total=4556 [2023-11-19 04:58:52,489 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 13 mSDsluCounter, 187 mSDsCounter, 0 mSdLazyCounter, 189 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 194 SdHoareTripleChecker+Invalid, 192 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 189 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-19 04:58:52,489 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 194 Invalid, 192 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 189 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-19 04:58:52,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2271 states. [2023-11-19 04:58:52,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2271 to 2271. [2023-11-19 04:58:52,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2271 states, 2269 states have (on average 1.148964301454385) internal successors, (2607), 2270 states have internal predecessors, (2607), 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) [2023-11-19 04:58:52,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2271 states to 2271 states and 2607 transitions. [2023-11-19 04:58:52,615 INFO L78 Accepts]: Start accepts. Automaton has 2271 states and 2607 transitions. Word has length 307 [2023-11-19 04:58:52,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 04:58:52,616 INFO L495 AbstractCegarLoop]: Abstraction has 2271 states and 2607 transitions. [2023-11-19 04:58:52,616 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 61 states, 61 states have (on average 5.950819672131147) internal successors, (363), 61 states have internal predecessors, (363), 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) [2023-11-19 04:58:52,616 INFO L276 IsEmpty]: Start isEmpty. Operand 2271 states and 2607 transitions. [2023-11-19 04:58:52,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 362 [2023-11-19 04:58:52,625 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 04:58:52,626 INFO L195 NwaCegarLoop]: trace histogram [60, 60, 59, 48, 48, 48, 12, 12, 12, 1, 1] [2023-11-19 04:58:52,647 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_825feb88-0cf0-41a2-b2f7-7d4d1dd48149/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-11-19 04:58:52,844 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_825feb88-0cf0-41a2-b2f7-7d4d1dd48149/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-11-19 04:58:52,845 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr5ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2023-11-19 04:58:52,845 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 04:58:52,845 INFO L85 PathProgramCache]: Analyzing trace with hash 1306662320, now seen corresponding path program 6 times [2023-11-19 04:58:52,845 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 04:58:52,846 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1185422708] [2023-11-19 04:58:52,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:58:52,846 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:58:52,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:58:55,726 INFO L134 CoverageAnalysis]: Checked inductivity of 9468 backedges. 2230 proven. 6864 refuted. 0 times theorem prover too weak. 374 trivial. 0 not checked. [2023-11-19 04:58:55,726 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 04:58:55,727 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1185422708] [2023-11-19 04:58:55,727 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1185422708] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 04:58:55,727 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [646992622] [2023-11-19 04:58:55,727 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-19 04:58:55,727 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 04:58:55,727 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_825feb88-0cf0-41a2-b2f7-7d4d1dd48149/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 04:58:55,729 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_825feb88-0cf0-41a2-b2f7-7d4d1dd48149/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 04:58:55,788 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_825feb88-0cf0-41a2-b2f7-7d4d1dd48149/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-11-19 04:58:55,920 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-19 04:58:55,921 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-19 04:58:55,924 INFO L262 TraceCheckSpWp]: Trace formula consists of 604 conjuncts, 50 conjunts are in the unsatisfiable core [2023-11-19 04:58:55,934 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 04:58:56,350 INFO L134 CoverageAnalysis]: Checked inductivity of 9468 backedges. 2230 proven. 6864 refuted. 0 times theorem prover too weak. 374 trivial. 0 not checked. [2023-11-19 04:58:56,350 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 04:58:57,967 INFO L134 CoverageAnalysis]: Checked inductivity of 9468 backedges. 2230 proven. 6864 refuted. 0 times theorem prover too weak. 374 trivial. 0 not checked. [2023-11-19 04:58:57,967 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [646992622] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 04:58:57,967 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1015919564] [2023-11-19 04:58:57,974 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2023-11-19 04:58:57,976 INFO L166 IcfgInterpreter]: Building call graph [2023-11-19 04:58:57,977 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-19 04:58:57,977 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-19 04:58:57,977 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-19 04:58:58,048 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-19 04:59:00,073 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '27902#(<= 2147483647 |ULTIMATE.start_main_~x~0#1|)' at error location [2023-11-19 04:59:00,074 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-19 04:59:00,074 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 04:59:00,074 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 50, 50] total 52 [2023-11-19 04:59:00,074 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [734637237] [2023-11-19 04:59:00,075 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 04:59:00,076 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2023-11-19 04:59:00,076 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 04:59:00,078 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2023-11-19 04:59:00,079 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1404, Invalid=2136, Unknown=0, NotChecked=0, Total=3540 [2023-11-19 04:59:00,080 INFO L87 Difference]: Start difference. First operand 2271 states and 2607 transitions. Second operand has 53 states, 53 states have (on average 5.886792452830188) internal successors, (312), 52 states have internal predecessors, (312), 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) [2023-11-19 04:59:00,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 04:59:00,360 INFO L93 Difference]: Finished difference Result 4275 states and 4950 transitions. [2023-11-19 04:59:00,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2023-11-19 04:59:00,361 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 53 states have (on average 5.886792452830188) internal successors, (312), 52 states have internal predecessors, (312), 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 361 [2023-11-19 04:59:00,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 04:59:00,373 INFO L225 Difference]: With dead ends: 4275 [2023-11-19 04:59:00,373 INFO L226 Difference]: Without dead ends: 2289 [2023-11-19 04:59:00,377 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1131 GetRequests, 978 SyntacticMatches, 95 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4034 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=1404, Invalid=2136, Unknown=0, NotChecked=0, Total=3540 [2023-11-19 04:59:00,378 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 5 mSDsluCounter, 169 mSDsCounter, 0 mSdLazyCounter, 168 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 177 SdHoareTripleChecker+Invalid, 169 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 168 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-19 04:59:00,378 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 177 Invalid, 169 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 168 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-19 04:59:00,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2289 states. [2023-11-19 04:59:00,473 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2289 to 2289. [2023-11-19 04:59:00,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2289 states, 2287 states have (on average 1.1477918670747704) internal successors, (2625), 2288 states have internal predecessors, (2625), 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) [2023-11-19 04:59:00,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2289 states to 2289 states and 2625 transitions. [2023-11-19 04:59:00,484 INFO L78 Accepts]: Start accepts. Automaton has 2289 states and 2625 transitions. Word has length 361 [2023-11-19 04:59:00,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 04:59:00,485 INFO L495 AbstractCegarLoop]: Abstraction has 2289 states and 2625 transitions. [2023-11-19 04:59:00,486 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 53 states have (on average 5.886792452830188) internal successors, (312), 52 states have internal predecessors, (312), 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) [2023-11-19 04:59:00,486 INFO L276 IsEmpty]: Start isEmpty. Operand 2289 states and 2625 transitions. [2023-11-19 04:59:00,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 378 [2023-11-19 04:59:00,493 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 04:59:00,494 INFO L195 NwaCegarLoop]: trace histogram [63, 63, 63, 62, 62, 62, 1, 1] [2023-11-19 04:59:00,522 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_825feb88-0cf0-41a2-b2f7-7d4d1dd48149/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-11-19 04:59:00,708 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_825feb88-0cf0-41a2-b2f7-7d4d1dd48149/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-11-19 04:59:00,709 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2023-11-19 04:59:00,709 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 04:59:00,709 INFO L85 PathProgramCache]: Analyzing trace with hash -1330253989, now seen corresponding path program 5 times [2023-11-19 04:59:00,709 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 04:59:00,709 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1395172681] [2023-11-19 04:59:00,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:59:00,710 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:59:00,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:59:04,737 INFO L134 CoverageAnalysis]: Checked inductivity of 11594 backedges. 0 proven. 11594 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 04:59:04,737 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 04:59:04,737 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1395172681] [2023-11-19 04:59:04,737 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1395172681] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 04:59:04,738 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [174025709] [2023-11-19 04:59:04,738 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-19 04:59:04,738 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 04:59:04,738 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_825feb88-0cf0-41a2-b2f7-7d4d1dd48149/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 04:59:04,739 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_825feb88-0cf0-41a2-b2f7-7d4d1dd48149/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 04:59:04,742 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_825feb88-0cf0-41a2-b2f7-7d4d1dd48149/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-11-19 04:59:04,942 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 63 check-sat command(s) [2023-11-19 04:59:04,943 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-19 04:59:04,946 INFO L262 TraceCheckSpWp]: Trace formula consists of 630 conjuncts, 64 conjunts are in the unsatisfiable core [2023-11-19 04:59:04,952 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 04:59:05,452 INFO L134 CoverageAnalysis]: Checked inductivity of 11594 backedges. 0 proven. 11594 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 04:59:05,452 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 04:59:11,060 INFO L134 CoverageAnalysis]: Checked inductivity of 11594 backedges. 0 proven. 11594 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 04:59:11,061 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [174025709] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 04:59:11,061 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1836965662] [2023-11-19 04:59:11,063 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2023-11-19 04:59:11,063 INFO L166 IcfgInterpreter]: Building call graph [2023-11-19 04:59:11,063 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-19 04:59:11,064 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-19 04:59:11,064 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-19 04:59:11,109 INFO L180 IcfgInterpreter]: Interpretation finished