./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 cf1a7837 Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b08eb20d-7909-45c9-81b1-cc8b9d55d176/bin/utaipan-verify-NcY6lQBIFX/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b08eb20d-7909-45c9-81b1-cc8b9d55d176/bin/utaipan-verify-NcY6lQBIFX/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b08eb20d-7909-45c9-81b1-cc8b9d55d176/bin/utaipan-verify-NcY6lQBIFX/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b08eb20d-7909-45c9-81b1-cc8b9d55d176/bin/utaipan-verify-NcY6lQBIFX/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_b08eb20d-7909-45c9-81b1-cc8b9d55d176/bin/utaipan-verify-NcY6lQBIFX/config/svcomp-Overflow-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b08eb20d-7909-45c9-81b1-cc8b9d55d176/bin/utaipan-verify-NcY6lQBIFX --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-cf1a783 [2023-11-12 00:15:02,201 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-12 00:15:02,345 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b08eb20d-7909-45c9-81b1-cc8b9d55d176/bin/utaipan-verify-NcY6lQBIFX/config/svcomp-Overflow-64bit-Taipan_Default.epf [2023-11-12 00:15:02,359 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-12 00:15:02,360 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-12 00:15:02,408 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-12 00:15:02,409 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-12 00:15:02,410 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-12 00:15:02,411 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-12 00:15:02,416 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-12 00:15:02,416 INFO L153 SettingsManager]: * User list type=DISABLED [2023-11-12 00:15:02,417 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-11-12 00:15:02,417 INFO L153 SettingsManager]: * Explicit value domain=true [2023-11-12 00:15:02,419 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-11-12 00:15:02,420 INFO L153 SettingsManager]: * Octagon Domain=false [2023-11-12 00:15:02,420 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-11-12 00:15:02,420 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-11-12 00:15:02,421 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-11-12 00:15:02,421 INFO L153 SettingsManager]: * Interval Domain=false [2023-11-12 00:15:02,422 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-11-12 00:15:02,422 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-11-12 00:15:02,423 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-11-12 00:15:02,424 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-12 00:15:02,425 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-12 00:15:02,425 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-12 00:15:02,426 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-12 00:15:02,426 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-12 00:15:02,427 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-12 00:15:02,427 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-12 00:15:02,427 INFO L153 SettingsManager]: * Check absence of signed integer overflows=true [2023-11-12 00:15:02,429 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-12 00:15:02,429 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-12 00:15:02,429 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-12 00:15:02,430 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-12 00:15:02,430 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-12 00:15:02,430 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-12 00:15:02,430 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-12 00:15:02,431 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-12 00:15:02,431 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-12 00:15:02,431 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-11-12 00:15:02,431 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-12 00:15:02,432 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-12 00:15:02,432 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-11-12 00:15:02,432 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-12 00:15:02,433 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_b08eb20d-7909-45c9-81b1-cc8b9d55d176/bin/utaipan-verify-NcY6lQBIFX/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b08eb20d-7909-45c9-81b1-cc8b9d55d176/bin/utaipan-verify-NcY6lQBIFX Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! overflow) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 06d48bd39a18f705c3286a70a8cdcced2226e3b2a16c7a38c85f5398d4bcad34 [2023-11-12 00:15:02,761 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-12 00:15:02,813 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-12 00:15:02,816 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-12 00:15:02,817 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-12 00:15:02,818 INFO L274 PluginConnector]: CDTParser initialized [2023-11-12 00:15:02,819 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b08eb20d-7909-45c9-81b1-cc8b9d55d176/bin/utaipan-verify-NcY6lQBIFX/../../sv-benchmarks/c/termination-crafted-lit/GopanReps-CAV2006-Fig1a.c [2023-11-12 00:15:05,980 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-12 00:15:06,184 INFO L384 CDTParser]: Found 1 translation units. [2023-11-12 00:15:06,185 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b08eb20d-7909-45c9-81b1-cc8b9d55d176/sv-benchmarks/c/termination-crafted-lit/GopanReps-CAV2006-Fig1a.c [2023-11-12 00:15:06,192 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b08eb20d-7909-45c9-81b1-cc8b9d55d176/bin/utaipan-verify-NcY6lQBIFX/data/7c6993557/e199aa8ebb504bcbad0895fd27311633/FLAG6d1badbb3 [2023-11-12 00:15:06,206 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b08eb20d-7909-45c9-81b1-cc8b9d55d176/bin/utaipan-verify-NcY6lQBIFX/data/7c6993557/e199aa8ebb504bcbad0895fd27311633 [2023-11-12 00:15:06,209 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-12 00:15:06,210 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-12 00:15:06,212 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-12 00:15:06,213 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-12 00:15:06,218 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-12 00:15:06,219 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 12:15:06" (1/1) ... [2023-11-12 00:15:06,220 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5ece6c6a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:15:06, skipping insertion in model container [2023-11-12 00:15:06,220 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 12:15:06" (1/1) ... [2023-11-12 00:15:06,239 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-12 00:15:06,456 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-12 00:15:06,462 INFO L202 MainTranslator]: Completed pre-run [2023-11-12 00:15:06,476 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-12 00:15:06,490 INFO L206 MainTranslator]: Completed translation [2023-11-12 00:15:06,491 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:15:06 WrapperNode [2023-11-12 00:15:06,495 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-12 00:15:06,497 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-12 00:15:06,497 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-12 00:15:06,497 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-12 00:15:06,505 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:15:06" (1/1) ... [2023-11-12 00:15:06,509 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:15:06" (1/1) ... [2023-11-12 00:15:06,527 INFO L138 Inliner]: procedures = 4, calls = 2, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 22 [2023-11-12 00:15:06,528 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-12 00:15:06,529 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-12 00:15:06,529 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-12 00:15:06,529 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-12 00:15:06,538 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:15:06" (1/1) ... [2023-11-12 00:15:06,539 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:15:06" (1/1) ... [2023-11-12 00:15:06,540 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:15:06" (1/1) ... [2023-11-12 00:15:06,540 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:15:06" (1/1) ... [2023-11-12 00:15:06,543 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:15:06" (1/1) ... [2023-11-12 00:15:06,547 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:15:06" (1/1) ... [2023-11-12 00:15:06,547 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:15:06" (1/1) ... [2023-11-12 00:15:06,549 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:15:06" (1/1) ... [2023-11-12 00:15:06,554 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-12 00:15:06,555 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-12 00:15:06,556 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-12 00:15:06,556 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-12 00:15:06,557 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:15:06" (1/1) ... [2023-11-12 00:15:06,564 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-12 00:15:06,576 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b08eb20d-7909-45c9-81b1-cc8b9d55d176/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 00:15:06,588 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b08eb20d-7909-45c9-81b1-cc8b9d55d176/bin/utaipan-verify-NcY6lQBIFX/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-12 00:15:06,605 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b08eb20d-7909-45c9-81b1-cc8b9d55d176/bin/utaipan-verify-NcY6lQBIFX/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-12 00:15:06,636 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-12 00:15:06,637 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-12 00:15:06,724 INFO L236 CfgBuilder]: Building ICFG [2023-11-12 00:15:06,726 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-12 00:15:06,833 INFO L277 CfgBuilder]: Performing block encoding [2023-11-12 00:15:06,853 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-12 00:15:06,853 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-11-12 00:15:06,856 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 12:15:06 BoogieIcfgContainer [2023-11-12 00:15:06,856 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-12 00:15:06,859 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-12 00:15:06,859 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-12 00:15:06,863 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-12 00:15:06,863 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.11 12:15:06" (1/3) ... [2023-11-12 00:15:06,864 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@62c7b1f1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 12:15:06, skipping insertion in model container [2023-11-12 00:15:06,864 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:15:06" (2/3) ... [2023-11-12 00:15:06,865 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@62c7b1f1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 12:15:06, skipping insertion in model container [2023-11-12 00:15:06,865 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 12:15:06" (3/3) ... [2023-11-12 00:15:06,866 INFO L112 eAbstractionObserver]: Analyzing ICFG GopanReps-CAV2006-Fig1a.c [2023-11-12 00:15:06,888 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-12 00:15:06,888 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 6 error locations. [2023-11-12 00:15:06,942 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-12 00:15:06,950 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;@29aafac2, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-12 00:15:06,950 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2023-11-12 00:15:06,955 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) [2023-11-12 00:15:06,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2023-11-12 00:15:06,962 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:15:06,963 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2023-11-12 00:15:06,964 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)] === [2023-11-12 00:15:06,970 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:15:06,970 INFO L85 PathProgramCache]: Analyzing trace with hash 2066791, now seen corresponding path program 1 times [2023-11-12 00:15:06,981 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:15:06,982 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1577095342] [2023-11-12 00:15:06,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:15:06,983 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:15:07,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:15:07,150 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 00:15:07,151 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:15:07,151 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1577095342] [2023-11-12 00:15:07,152 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1577095342] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 00:15:07,152 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 00:15:07,152 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-12 00:15:07,154 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [647988842] [2023-11-12 00:15:07,155 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 00:15:07,159 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-12 00:15:07,160 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:15:07,196 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-12 00:15:07,197 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 00:15:07,201 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) [2023-11-12 00:15:07,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:15:07,263 INFO L93 Difference]: Finished difference Result 39 states and 45 transitions. [2023-11-12 00:15:07,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-12 00:15:07,266 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 [2023-11-12 00:15:07,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:15:07,274 INFO L225 Difference]: With dead ends: 39 [2023-11-12 00:15:07,275 INFO L226 Difference]: Without dead ends: 23 [2023-11-12 00:15:07,277 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 [2023-11-12 00:15:07,282 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 7 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s 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, 0.0s IncrementalHoareTripleChecker+Time [2023-11-12 00:15:07,283 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 20 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-12 00:15:07,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2023-11-12 00:15:07,313 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 21. [2023-11-12 00:15:07,314 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) [2023-11-12 00:15:07,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 25 transitions. [2023-11-12 00:15:07,317 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 25 transitions. Word has length 4 [2023-11-12 00:15:07,317 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:15:07,317 INFO L495 AbstractCegarLoop]: Abstraction has 21 states and 25 transitions. [2023-11-12 00:15:07,318 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) [2023-11-12 00:15:07,318 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 25 transitions. [2023-11-12 00:15:07,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2023-11-12 00:15:07,318 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:15:07,318 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2023-11-12 00:15:07,319 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-12 00:15:07,319 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)] === [2023-11-12 00:15:07,320 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:15:07,320 INFO L85 PathProgramCache]: Analyzing trace with hash 2066599, now seen corresponding path program 1 times [2023-11-12 00:15:07,320 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:15:07,320 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2006702015] [2023-11-12 00:15:07,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:15:07,321 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:15:07,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:15:07,350 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 00:15:07,350 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:15:07,351 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2006702015] [2023-11-12 00:15:07,351 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2006702015] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 00:15:07,351 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 00:15:07,351 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-12 00:15:07,352 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1501106079] [2023-11-12 00:15:07,352 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 00:15:07,353 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-12 00:15:07,353 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:15:07,354 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-12 00:15:07,354 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 00:15:07,355 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) [2023-11-12 00:15:07,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:15:07,386 INFO L93 Difference]: Finished difference Result 26 states and 30 transitions. [2023-11-12 00:15:07,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-12 00:15:07,387 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 [2023-11-12 00:15:07,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:15:07,388 INFO L225 Difference]: With dead ends: 26 [2023-11-12 00:15:07,388 INFO L226 Difference]: Without dead ends: 24 [2023-11-12 00:15:07,388 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 [2023-11-12 00:15:07,390 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 [2023-11-12 00:15:07,391 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] [2023-11-12 00:15:07,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2023-11-12 00:15:07,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 19. [2023-11-12 00:15:07,396 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) [2023-11-12 00:15:07,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 22 transitions. [2023-11-12 00:15:07,397 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 22 transitions. Word has length 4 [2023-11-12 00:15:07,398 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:15:07,398 INFO L495 AbstractCegarLoop]: Abstraction has 19 states and 22 transitions. [2023-11-12 00:15:07,398 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) [2023-11-12 00:15:07,398 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 22 transitions. [2023-11-12 00:15:07,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2023-11-12 00:15:07,399 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:15:07,399 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2023-11-12 00:15:07,399 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-12 00:15:07,400 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)] === [2023-11-12 00:15:07,400 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:15:07,401 INFO L85 PathProgramCache]: Analyzing trace with hash 64064617, now seen corresponding path program 1 times [2023-11-12 00:15:07,401 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:15:07,401 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [265966500] [2023-11-12 00:15:07,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:15:07,402 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:15:07,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:15:07,447 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 00:15:07,448 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:15:07,448 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [265966500] [2023-11-12 00:15:07,449 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [265966500] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 00:15:07,449 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 00:15:07,449 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-12 00:15:07,449 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [168174322] [2023-11-12 00:15:07,450 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 00:15:07,450 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-12 00:15:07,450 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:15:07,451 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-12 00:15:07,451 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 00:15:07,452 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) [2023-11-12 00:15:07,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:15:07,499 INFO L93 Difference]: Finished difference Result 20 states and 22 transitions. [2023-11-12 00:15:07,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-12 00:15:07,502 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 [2023-11-12 00:15:07,502 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:15:07,502 INFO L225 Difference]: With dead ends: 20 [2023-11-12 00:15:07,503 INFO L226 Difference]: Without dead ends: 19 [2023-11-12 00:15:07,503 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 [2023-11-12 00:15:07,505 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 [2023-11-12 00:15:07,506 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] [2023-11-12 00:15:07,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2023-11-12 00:15:07,510 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2023-11-12 00:15:07,510 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) [2023-11-12 00:15:07,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 21 transitions. [2023-11-12 00:15:07,511 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 21 transitions. Word has length 5 [2023-11-12 00:15:07,511 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:15:07,511 INFO L495 AbstractCegarLoop]: Abstraction has 19 states and 21 transitions. [2023-11-12 00:15:07,512 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) [2023-11-12 00:15:07,512 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 21 transitions. [2023-11-12 00:15:07,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2023-11-12 00:15:07,513 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:15:07,513 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2023-11-12 00:15:07,513 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-12 00:15:07,513 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)] === [2023-11-12 00:15:07,514 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:15:07,514 INFO L85 PathProgramCache]: Analyzing trace with hash 1986003184, now seen corresponding path program 1 times [2023-11-12 00:15:07,515 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:15:07,515 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1530899842] [2023-11-12 00:15:07,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:15:07,515 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:15:07,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:15:07,610 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 00:15:07,611 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:15:07,611 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1530899842] [2023-11-12 00:15:07,611 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1530899842] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 00:15:07,612 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 00:15:07,612 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-12 00:15:07,612 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [99495957] [2023-11-12 00:15:07,612 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 00:15:07,613 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-12 00:15:07,613 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:15:07,614 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-12 00:15:07,614 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 00:15:07,614 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) [2023-11-12 00:15:07,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:15:07,643 INFO L93 Difference]: Finished difference Result 19 states and 21 transitions. [2023-11-12 00:15:07,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-12 00:15:07,644 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 [2023-11-12 00:15:07,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:15:07,645 INFO L225 Difference]: With dead ends: 19 [2023-11-12 00:15:07,645 INFO L226 Difference]: Without dead ends: 18 [2023-11-12 00:15:07,646 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 [2023-11-12 00:15:07,648 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 [2023-11-12 00:15:07,649 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] [2023-11-12 00:15:07,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2023-11-12 00:15:07,652 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2023-11-12 00:15:07,653 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) [2023-11-12 00:15:07,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 19 transitions. [2023-11-12 00:15:07,654 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 19 transitions. Word has length 6 [2023-11-12 00:15:07,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:15:07,654 INFO L495 AbstractCegarLoop]: Abstraction has 18 states and 19 transitions. [2023-11-12 00:15:07,654 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) [2023-11-12 00:15:07,655 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 19 transitions. [2023-11-12 00:15:07,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2023-11-12 00:15:07,655 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:15:07,655 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 00:15:07,656 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-12 00:15:07,656 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)] === [2023-11-12 00:15:07,657 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:15:07,657 INFO L85 PathProgramCache]: Analyzing trace with hash 578676022, now seen corresponding path program 1 times [2023-11-12 00:15:07,657 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:15:07,657 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [630849767] [2023-11-12 00:15:07,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:15:07,658 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:15:07,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:15:07,727 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 00:15:07,729 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:15:07,730 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [630849767] [2023-11-12 00:15:07,730 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [630849767] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 00:15:07,730 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1115526129] [2023-11-12 00:15:07,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:15:07,731 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:15:07,731 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b08eb20d-7909-45c9-81b1-cc8b9d55d176/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 00:15:07,739 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b08eb20d-7909-45c9-81b1-cc8b9d55d176/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 00:15:07,744 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b08eb20d-7909-45c9-81b1-cc8b9d55d176/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-12 00:15:07,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:15:07,795 INFO L262 TraceCheckSpWp]: Trace formula consists of 20 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-12 00:15:07,801 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 00:15:07,891 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 00:15:07,891 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 00:15:07,948 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 00:15:07,949 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1115526129] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 00:15:07,949 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [313120848] [2023-11-12 00:15:07,971 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2023-11-12 00:15:07,971 INFO L166 IcfgInterpreter]: Building call graph [2023-11-12 00:15:07,975 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-12 00:15:07,981 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-12 00:15:07,982 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-12 00:15:08,296 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-12 00:15:08,449 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 [2023-11-12 00:15:08,450 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-12 00:15:08,450 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-12 00:15:08,450 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 2, 2] total 7 [2023-11-12 00:15:08,450 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1765232023] [2023-11-12 00:15:08,457 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-12 00:15:08,458 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-12 00:15:08,459 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:15:08,461 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-12 00:15:08,463 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2023-11-12 00:15:08,463 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) [2023-11-12 00:15:08,585 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:15:08,586 INFO L93 Difference]: Finished difference Result 34 states and 40 transitions. [2023-11-12 00:15:08,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-12 00:15:08,587 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 [2023-11-12 00:15:08,587 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:15:08,588 INFO L225 Difference]: With dead ends: 34 [2023-11-12 00:15:08,588 INFO L226 Difference]: Without dead ends: 23 [2023-11-12 00:15:08,589 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 [2023-11-12 00:15:08,595 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 [2023-11-12 00:15:08,596 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] [2023-11-12 00:15:08,600 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2023-11-12 00:15:08,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2023-11-12 00:15:08,607 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) [2023-11-12 00:15:08,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 24 transitions. [2023-11-12 00:15:08,610 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 24 transitions. Word has length 11 [2023-11-12 00:15:08,611 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:15:08,611 INFO L495 AbstractCegarLoop]: Abstraction has 23 states and 24 transitions. [2023-11-12 00:15:08,612 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) [2023-11-12 00:15:08,612 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 24 transitions. [2023-11-12 00:15:08,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2023-11-12 00:15:08,613 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:15:08,613 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1] [2023-11-12 00:15:08,624 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b08eb20d-7909-45c9-81b1-cc8b9d55d176/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-11-12 00:15:08,818 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b08eb20d-7909-45c9-81b1-cc8b9d55d176/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:15:08,819 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)] === [2023-11-12 00:15:08,819 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:15:08,820 INFO L85 PathProgramCache]: Analyzing trace with hash -358707657, now seen corresponding path program 1 times [2023-11-12 00:15:08,820 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:15:08,820 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1914221656] [2023-11-12 00:15:08,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:15:08,820 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:15:08,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:15:08,974 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 00:15:08,975 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:15:08,975 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1914221656] [2023-11-12 00:15:08,975 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1914221656] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 00:15:08,975 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [376165231] [2023-11-12 00:15:08,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:15:08,976 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:15:08,976 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b08eb20d-7909-45c9-81b1-cc8b9d55d176/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 00:15:08,981 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b08eb20d-7909-45c9-81b1-cc8b9d55d176/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 00:15:09,012 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b08eb20d-7909-45c9-81b1-cc8b9d55d176/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-12 00:15:09,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:15:09,027 INFO L262 TraceCheckSpWp]: Trace formula consists of 30 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-12 00:15:09,029 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 00:15:09,074 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 00:15:09,075 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 00:15:09,138 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 00:15:09,138 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [376165231] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 00:15:09,138 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [619100805] [2023-11-12 00:15:09,141 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2023-11-12 00:15:09,141 INFO L166 IcfgInterpreter]: Building call graph [2023-11-12 00:15:09,141 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-12 00:15:09,142 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-12 00:15:09,142 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-12 00:15:09,241 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-12 00:15:09,367 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 [2023-11-12 00:15:09,368 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-12 00:15:09,368 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-12 00:15:09,368 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-11-12 00:15:09,368 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1866453171] [2023-11-12 00:15:09,369 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-12 00:15:09,369 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-12 00:15:09,369 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:15:09,370 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-12 00:15:09,370 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2023-11-12 00:15:09,371 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) [2023-11-12 00:15:09,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:15:09,443 INFO L93 Difference]: Finished difference Result 78 states and 90 transitions. [2023-11-12 00:15:09,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-12 00:15:09,443 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 [2023-11-12 00:15:09,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:15:09,445 INFO L225 Difference]: With dead ends: 78 [2023-11-12 00:15:09,445 INFO L226 Difference]: Without dead ends: 77 [2023-11-12 00:15:09,446 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 [2023-11-12 00:15:09,447 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 [2023-11-12 00:15:09,447 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] [2023-11-12 00:15:09,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2023-11-12 00:15:09,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 67. [2023-11-12 00:15:09,461 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) [2023-11-12 00:15:09,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 80 transitions. [2023-11-12 00:15:09,465 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 80 transitions. Word has length 17 [2023-11-12 00:15:09,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:15:09,466 INFO L495 AbstractCegarLoop]: Abstraction has 67 states and 80 transitions. [2023-11-12 00:15:09,466 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) [2023-11-12 00:15:09,466 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 80 transitions. [2023-11-12 00:15:09,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2023-11-12 00:15:09,467 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:15:09,468 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1] [2023-11-12 00:15:09,479 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b08eb20d-7909-45c9-81b1-cc8b9d55d176/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-12 00:15:09,674 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b08eb20d-7909-45c9-81b1-cc8b9d55d176/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2023-11-12 00:15:09,675 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)] === [2023-11-12 00:15:09,675 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:15:09,675 INFO L85 PathProgramCache]: Analyzing trace with hash -1114947233, now seen corresponding path program 1 times [2023-11-12 00:15:09,675 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:15:09,675 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1720995995] [2023-11-12 00:15:09,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:15:09,676 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:15:09,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:15:09,738 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 10 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-12 00:15:09,738 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:15:09,738 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1720995995] [2023-11-12 00:15:09,739 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1720995995] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 00:15:09,739 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1057076902] [2023-11-12 00:15:09,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:15:09,739 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:15:09,739 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b08eb20d-7909-45c9-81b1-cc8b9d55d176/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 00:15:09,740 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b08eb20d-7909-45c9-81b1-cc8b9d55d176/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 00:15:09,768 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b08eb20d-7909-45c9-81b1-cc8b9d55d176/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-12 00:15:09,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:15:09,784 INFO L262 TraceCheckSpWp]: Trace formula consists of 34 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-12 00:15:09,785 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 00:15:09,836 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 00:15:09,837 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 00:15:09,888 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 00:15:09,890 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1057076902] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 00:15:09,890 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2083528042] [2023-11-12 00:15:09,893 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2023-11-12 00:15:09,894 INFO L166 IcfgInterpreter]: Building call graph [2023-11-12 00:15:09,894 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-12 00:15:09,894 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-12 00:15:09,894 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-12 00:15:10,066 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-12 00:15:10,191 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '766#(<= 2147483647 |ULTIMATE.start_main_~x~0#1|)' at error location [2023-11-12 00:15:10,192 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-12 00:15:10,192 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-12 00:15:10,192 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2023-11-12 00:15:10,192 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [494369165] [2023-11-12 00:15:10,192 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-12 00:15:10,193 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-12 00:15:10,193 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:15:10,195 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-12 00:15:10,195 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=197, Unknown=0, NotChecked=0, Total=272 [2023-11-12 00:15:10,196 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) [2023-11-12 00:15:10,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:15:10,265 INFO L93 Difference]: Finished difference Result 159 states and 200 transitions. [2023-11-12 00:15:10,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-12 00:15:10,266 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 [2023-11-12 00:15:10,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:15:10,272 INFO L225 Difference]: With dead ends: 159 [2023-11-12 00:15:10,272 INFO L226 Difference]: Without dead ends: 105 [2023-11-12 00:15:10,274 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 [2023-11-12 00:15:10,275 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 [2023-11-12 00:15:10,275 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] [2023-11-12 00:15:10,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2023-11-12 00:15:10,296 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 105. [2023-11-12 00:15:10,297 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) [2023-11-12 00:15:10,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 118 transitions. [2023-11-12 00:15:10,298 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 118 transitions. Word has length 19 [2023-11-12 00:15:10,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:15:10,299 INFO L495 AbstractCegarLoop]: Abstraction has 105 states and 118 transitions. [2023-11-12 00:15:10,299 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) [2023-11-12 00:15:10,299 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 118 transitions. [2023-11-12 00:15:10,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2023-11-12 00:15:10,301 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:15:10,301 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 6, 6, 6, 1, 1] [2023-11-12 00:15:10,312 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b08eb20d-7909-45c9-81b1-cc8b9d55d176/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-11-12 00:15:10,505 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b08eb20d-7909-45c9-81b1-cc8b9d55d176/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2023-11-12 00:15:10,506 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)] === [2023-11-12 00:15:10,506 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:15:10,507 INFO L85 PathProgramCache]: Analyzing trace with hash -1789312301, now seen corresponding path program 2 times [2023-11-12 00:15:10,507 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:15:10,507 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [278639898] [2023-11-12 00:15:10,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:15:10,507 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:15:10,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:15:10,701 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 114 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 00:15:10,701 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:15:10,701 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [278639898] [2023-11-12 00:15:10,701 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [278639898] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 00:15:10,702 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [539916953] [2023-11-12 00:15:10,702 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-12 00:15:10,702 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:15:10,702 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b08eb20d-7909-45c9-81b1-cc8b9d55d176/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 00:15:10,703 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b08eb20d-7909-45c9-81b1-cc8b9d55d176/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 00:15:10,720 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b08eb20d-7909-45c9-81b1-cc8b9d55d176/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-12 00:15:10,755 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2023-11-12 00:15:10,755 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-12 00:15:10,756 INFO L262 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-12 00:15:10,759 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 00:15:10,827 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 114 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 00:15:10,827 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 00:15:11,000 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 114 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 00:15:11,000 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [539916953] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 00:15:11,000 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1215396963] [2023-11-12 00:15:11,003 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2023-11-12 00:15:11,003 INFO L166 IcfgInterpreter]: Building call graph [2023-11-12 00:15:11,003 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-12 00:15:11,004 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-12 00:15:11,004 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-12 00:15:11,098 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-12 00:15:11,304 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 [2023-11-12 00:15:11,304 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-12 00:15:11,304 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-12 00:15:11,304 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 14 [2023-11-12 00:15:11,305 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2034972417] [2023-11-12 00:15:11,305 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-12 00:15:11,306 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-11-12 00:15:11,306 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:15:11,307 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-11-12 00:15:11,307 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=285, Unknown=0, NotChecked=0, Total=420 [2023-11-12 00:15:11,308 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) [2023-11-12 00:15:11,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:15:11,471 INFO L93 Difference]: Finished difference Result 562 states and 655 transitions. [2023-11-12 00:15:11,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-11-12 00:15:11,472 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 [2023-11-12 00:15:11,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:15:11,476 INFO L225 Difference]: With dead ends: 562 [2023-11-12 00:15:11,477 INFO L226 Difference]: Without dead ends: 561 [2023-11-12 00:15:11,478 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 [2023-11-12 00:15:11,479 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 [2023-11-12 00:15:11,479 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] [2023-11-12 00:15:11,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 561 states. [2023-11-12 00:15:11,510 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 561 to 369. [2023-11-12 00:15:11,511 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) [2023-11-12 00:15:11,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 369 states to 369 states and 427 transitions. [2023-11-12 00:15:11,515 INFO L78 Accepts]: Start accepts. Automaton has 369 states and 427 transitions. Word has length 41 [2023-11-12 00:15:11,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:15:11,516 INFO L495 AbstractCegarLoop]: Abstraction has 369 states and 427 transitions. [2023-11-12 00:15:11,516 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) [2023-11-12 00:15:11,516 INFO L276 IsEmpty]: Start isEmpty. Operand 369 states and 427 transitions. [2023-11-12 00:15:11,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2023-11-12 00:15:11,519 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:15:11,520 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 8, 5, 5, 5, 4, 4, 4, 1, 1] [2023-11-12 00:15:11,533 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b08eb20d-7909-45c9-81b1-cc8b9d55d176/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-12 00:15:11,726 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b08eb20d-7909-45c9-81b1-cc8b9d55d176/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2023-11-12 00:15:11,726 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)] === [2023-11-12 00:15:11,727 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:15:11,727 INFO L85 PathProgramCache]: Analyzing trace with hash -419532703, now seen corresponding path program 2 times [2023-11-12 00:15:11,727 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:15:11,727 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1575237769] [2023-11-12 00:15:11,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:15:11,727 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:15:11,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:15:11,827 INFO L134 CoverageAnalysis]: Checked inductivity of 176 backedges. 80 proven. 44 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2023-11-12 00:15:11,828 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:15:11,828 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1575237769] [2023-11-12 00:15:11,828 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1575237769] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 00:15:11,828 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1477623528] [2023-11-12 00:15:11,828 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-12 00:15:11,828 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:15:11,829 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b08eb20d-7909-45c9-81b1-cc8b9d55d176/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 00:15:11,830 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b08eb20d-7909-45c9-81b1-cc8b9d55d176/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 00:15:11,860 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b08eb20d-7909-45c9-81b1-cc8b9d55d176/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-12 00:15:11,886 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2023-11-12 00:15:11,886 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-12 00:15:11,887 INFO L262 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-12 00:15:11,890 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 00:15:11,931 INFO L134 CoverageAnalysis]: Checked inductivity of 176 backedges. 80 proven. 44 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2023-11-12 00:15:11,932 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 00:15:12,020 INFO L134 CoverageAnalysis]: Checked inductivity of 176 backedges. 80 proven. 44 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2023-11-12 00:15:12,020 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1477623528] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 00:15:12,021 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [390153640] [2023-11-12 00:15:12,023 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2023-11-12 00:15:12,023 INFO L166 IcfgInterpreter]: Building call graph [2023-11-12 00:15:12,023 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-12 00:15:12,024 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-12 00:15:12,024 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-12 00:15:12,129 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-12 00:15:12,288 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2745#(<= 2147483647 |ULTIMATE.start_main_~x~0#1|)' at error location [2023-11-12 00:15:12,289 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-12 00:15:12,289 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-12 00:15:12,289 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 11 [2023-11-12 00:15:12,289 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2041428258] [2023-11-12 00:15:12,289 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-12 00:15:12,290 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-12 00:15:12,290 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:15:12,290 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-12 00:15:12,291 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=250, Unknown=0, NotChecked=0, Total=342 [2023-11-12 00:15:12,291 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) [2023-11-12 00:15:12,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:15:12,380 INFO L93 Difference]: Finished difference Result 595 states and 690 transitions. [2023-11-12 00:15:12,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-12 00:15:12,381 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 [2023-11-12 00:15:12,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:15:12,383 INFO L225 Difference]: With dead ends: 595 [2023-11-12 00:15:12,383 INFO L226 Difference]: Without dead ends: 247 [2023-11-12 00:15:12,389 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 148 SyntacticMatches, 4 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 153 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=92, Invalid=250, Unknown=0, NotChecked=0, Total=342 [2023-11-12 00:15:12,391 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 9 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s 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, 0.1s IncrementalHoareTripleChecker+Time [2023-11-12 00:15:12,392 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 50 Invalid, 45 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-12 00:15:12,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 247 states. [2023-11-12 00:15:12,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 247 to 247. [2023-11-12 00:15:12,406 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) [2023-11-12 00:15:12,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 247 states to 247 states and 278 transitions. [2023-11-12 00:15:12,409 INFO L78 Accepts]: Start accepts. Automaton has 247 states and 278 transitions. Word has length 55 [2023-11-12 00:15:12,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:15:12,411 INFO L495 AbstractCegarLoop]: Abstraction has 247 states and 278 transitions. [2023-11-12 00:15:12,411 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) [2023-11-12 00:15:12,411 INFO L276 IsEmpty]: Start isEmpty. Operand 247 states and 278 transitions. [2023-11-12 00:15:12,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2023-11-12 00:15:12,421 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:15:12,421 INFO L195 NwaCegarLoop]: trace histogram [15, 15, 15, 14, 14, 14, 1, 1] [2023-11-12 00:15:12,433 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b08eb20d-7909-45c9-81b1-cc8b9d55d176/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-12 00:15:12,628 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b08eb20d-7909-45c9-81b1-cc8b9d55d176/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:15:12,629 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)] === [2023-11-12 00:15:12,629 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:15:12,629 INFO L85 PathProgramCache]: Analyzing trace with hash -1132236789, now seen corresponding path program 3 times [2023-11-12 00:15:12,629 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:15:12,630 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [747007192] [2023-11-12 00:15:12,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:15:12,630 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:15:12,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:15:13,086 INFO L134 CoverageAnalysis]: Checked inductivity of 602 backedges. 0 proven. 602 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 00:15:13,086 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:15:13,086 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [747007192] [2023-11-12 00:15:13,086 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [747007192] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 00:15:13,086 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [518197804] [2023-11-12 00:15:13,086 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-12 00:15:13,087 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:15:13,087 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b08eb20d-7909-45c9-81b1-cc8b9d55d176/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 00:15:13,088 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b08eb20d-7909-45c9-81b1-cc8b9d55d176/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 00:15:13,114 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b08eb20d-7909-45c9-81b1-cc8b9d55d176/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-12 00:15:13,152 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-12 00:15:13,152 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-12 00:15:13,153 INFO L262 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 16 conjunts are in the unsatisfiable core [2023-11-12 00:15:13,158 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 00:15:13,292 INFO L134 CoverageAnalysis]: Checked inductivity of 602 backedges. 0 proven. 602 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 00:15:13,292 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 00:15:13,814 INFO L134 CoverageAnalysis]: Checked inductivity of 602 backedges. 0 proven. 602 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 00:15:13,814 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [518197804] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 00:15:13,814 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1589704612] [2023-11-12 00:15:13,818 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2023-11-12 00:15:13,818 INFO L166 IcfgInterpreter]: Building call graph [2023-11-12 00:15:13,819 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-12 00:15:13,819 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-12 00:15:13,819 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-12 00:15:13,885 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-12 00:15:14,318 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 [2023-11-12 00:15:14,319 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-12 00:15:14,319 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-12 00:15:14,319 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 30 [2023-11-12 00:15:14,319 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [972367428] [2023-11-12 00:15:14,319 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-12 00:15:14,320 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2023-11-12 00:15:14,320 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:15:14,321 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2023-11-12 00:15:14,322 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=511, Invalid=821, Unknown=0, NotChecked=0, Total=1332 [2023-11-12 00:15:14,322 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) [2023-11-12 00:15:14,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:15:14,675 INFO L93 Difference]: Finished difference Result 2228 states and 2599 transitions. [2023-11-12 00:15:14,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2023-11-12 00:15:14,675 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 [2023-11-12 00:15:14,677 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:15:14,691 INFO L225 Difference]: With dead ends: 2228 [2023-11-12 00:15:14,691 INFO L226 Difference]: Without dead ends: 2227 [2023-11-12 00:15:14,693 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 [2023-11-12 00:15:14,693 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 [2023-11-12 00:15:14,695 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] [2023-11-12 00:15:14,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2227 states. [2023-11-12 00:15:14,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2227 to 949. [2023-11-12 00:15:14,786 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) [2023-11-12 00:15:14,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 949 states to 949 states and 1103 transitions. [2023-11-12 00:15:14,790 INFO L78 Accepts]: Start accepts. Automaton has 949 states and 1103 transitions. Word has length 89 [2023-11-12 00:15:14,792 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:15:14,793 INFO L495 AbstractCegarLoop]: Abstraction has 949 states and 1103 transitions. [2023-11-12 00:15:14,793 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) [2023-11-12 00:15:14,793 INFO L276 IsEmpty]: Start isEmpty. Operand 949 states and 1103 transitions. [2023-11-12 00:15:14,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2023-11-12 00:15:14,796 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:15:14,796 INFO L195 NwaCegarLoop]: trace histogram [15, 15, 14, 10, 10, 10, 5, 5, 5, 1, 1] [2023-11-12 00:15:14,807 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b08eb20d-7909-45c9-81b1-cc8b9d55d176/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-12 00:15:15,001 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b08eb20d-7909-45c9-81b1-cc8b9d55d176/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:15:15,002 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)] === [2023-11-12 00:15:15,002 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:15:15,002 INFO L85 PathProgramCache]: Analyzing trace with hash -947455925, now seen corresponding path program 3 times [2023-11-12 00:15:15,002 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:15:15,002 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1080407925] [2023-11-12 00:15:15,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:15:15,003 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:15:15,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:15:15,259 INFO L134 CoverageAnalysis]: Checked inductivity of 530 backedges. 188 proven. 290 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2023-11-12 00:15:15,260 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:15:15,260 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1080407925] [2023-11-12 00:15:15,260 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1080407925] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 00:15:15,260 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [551099087] [2023-11-12 00:15:15,260 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-12 00:15:15,261 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:15:15,261 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b08eb20d-7909-45c9-81b1-cc8b9d55d176/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 00:15:15,262 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b08eb20d-7909-45c9-81b1-cc8b9d55d176/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 00:15:15,285 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b08eb20d-7909-45c9-81b1-cc8b9d55d176/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-12 00:15:15,332 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-12 00:15:15,333 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-12 00:15:15,334 INFO L262 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-12 00:15:15,340 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 00:15:15,426 INFO L134 CoverageAnalysis]: Checked inductivity of 530 backedges. 188 proven. 290 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2023-11-12 00:15:15,427 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 00:15:15,737 INFO L134 CoverageAnalysis]: Checked inductivity of 530 backedges. 188 proven. 290 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2023-11-12 00:15:15,737 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [551099087] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 00:15:15,737 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [650464584] [2023-11-12 00:15:15,739 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2023-11-12 00:15:15,739 INFO L166 IcfgInterpreter]: Building call graph [2023-11-12 00:15:15,740 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-12 00:15:15,740 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-12 00:15:15,740 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-12 00:15:15,862 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-12 00:15:16,184 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '8512#(<= 2147483647 |ULTIMATE.start_main_~x~0#1|)' at error location [2023-11-12 00:15:16,184 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-12 00:15:16,184 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-12 00:15:16,184 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 23 [2023-11-12 00:15:16,185 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [550902390] [2023-11-12 00:15:16,185 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-12 00:15:16,185 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-11-12 00:15:16,186 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:15:16,186 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-11-12 00:15:16,187 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=302, Invalid=628, Unknown=0, NotChecked=0, Total=930 [2023-11-12 00:15:16,187 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) [2023-11-12 00:15:16,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:15:16,324 INFO L93 Difference]: Finished difference Result 1483 states and 1728 transitions. [2023-11-12 00:15:16,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-11-12 00:15:16,324 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 [2023-11-12 00:15:16,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:15:16,328 INFO L225 Difference]: With dead ends: 1483 [2023-11-12 00:15:16,328 INFO L226 Difference]: Without dead ends: 591 [2023-11-12 00:15:16,330 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 [2023-11-12 00:15:16,331 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 [2023-11-12 00:15:16,331 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] [2023-11-12 00:15:16,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 591 states. [2023-11-12 00:15:16,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 591 to 591. [2023-11-12 00:15:16,354 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) [2023-11-12 00:15:16,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 591 states to 591 states and 670 transitions. [2023-11-12 00:15:16,356 INFO L78 Accepts]: Start accepts. Automaton has 591 states and 670 transitions. Word has length 91 [2023-11-12 00:15:16,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:15:16,357 INFO L495 AbstractCegarLoop]: Abstraction has 591 states and 670 transitions. [2023-11-12 00:15:16,357 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) [2023-11-12 00:15:16,357 INFO L276 IsEmpty]: Start isEmpty. Operand 591 states and 670 transitions. [2023-11-12 00:15:16,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2023-11-12 00:15:16,359 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:15:16,359 INFO L195 NwaCegarLoop]: trace histogram [27, 27, 26, 22, 22, 22, 5, 5, 5, 1, 1] [2023-11-12 00:15:16,366 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b08eb20d-7909-45c9-81b1-cc8b9d55d176/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-11-12 00:15:16,565 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b08eb20d-7909-45c9-81b1-cc8b9d55d176/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:15:16,565 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)] === [2023-11-12 00:15:16,566 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:15:16,566 INFO L85 PathProgramCache]: Analyzing trace with hash 1278869791, now seen corresponding path program 4 times [2023-11-12 00:15:16,566 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:15:16,566 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [163770617] [2023-11-12 00:15:16,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:15:16,566 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:15:16,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:15:17,356 INFO L134 CoverageAnalysis]: Checked inductivity of 1886 backedges. 404 proven. 1430 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2023-11-12 00:15:17,356 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:15:17,356 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [163770617] [2023-11-12 00:15:17,356 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [163770617] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 00:15:17,356 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1564109137] [2023-11-12 00:15:17,357 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-12 00:15:17,357 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:15:17,357 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b08eb20d-7909-45c9-81b1-cc8b9d55d176/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 00:15:17,358 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b08eb20d-7909-45c9-81b1-cc8b9d55d176/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 00:15:17,380 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b08eb20d-7909-45c9-81b1-cc8b9d55d176/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-12 00:15:17,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:15:17,437 INFO L262 TraceCheckSpWp]: Trace formula consists of 274 conjuncts, 24 conjunts are in the unsatisfiable core [2023-11-12 00:15:17,442 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 00:15:17,629 INFO L134 CoverageAnalysis]: Checked inductivity of 1886 backedges. 404 proven. 1430 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2023-11-12 00:15:17,629 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 00:15:18,619 INFO L134 CoverageAnalysis]: Checked inductivity of 1886 backedges. 404 proven. 1430 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2023-11-12 00:15:18,620 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1564109137] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 00:15:18,620 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [558853160] [2023-11-12 00:15:18,622 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2023-11-12 00:15:18,622 INFO L166 IcfgInterpreter]: Building call graph [2023-11-12 00:15:18,622 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-12 00:15:18,622 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-12 00:15:18,622 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-12 00:15:18,707 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-12 00:15:19,444 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '11929#(<= 2147483647 |ULTIMATE.start_main_~x~0#1|)' at error location [2023-11-12 00:15:19,445 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-12 00:15:19,445 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-12 00:15:19,445 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24, 24] total 47 [2023-11-12 00:15:19,445 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1554694740] [2023-11-12 00:15:19,445 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-12 00:15:19,446 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2023-11-12 00:15:19,446 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:15:19,448 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2023-11-12 00:15:19,449 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1154, Invalid=1816, Unknown=0, NotChecked=0, Total=2970 [2023-11-12 00:15:19,450 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) [2023-11-12 00:15:19,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:15:19,692 INFO L93 Difference]: Finished difference Result 786 states and 894 transitions. [2023-11-12 00:15:19,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2023-11-12 00:15:19,692 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 [2023-11-12 00:15:19,693 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:15:19,695 INFO L225 Difference]: With dead ends: 786 [2023-11-12 00:15:19,695 INFO L226 Difference]: Without dead ends: 324 [2023-11-12 00:15:19,697 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 511 GetRequests, 436 SyntacticMatches, 22 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1971 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=1154, Invalid=1816, Unknown=0, NotChecked=0, Total=2970 [2023-11-12 00:15:19,698 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 [2023-11-12 00:15:19,698 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] [2023-11-12 00:15:19,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 324 states. [2023-11-12 00:15:19,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 324 to 309. [2023-11-12 00:15:19,717 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) [2023-11-12 00:15:19,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 309 states to 309 states and 329 transitions. [2023-11-12 00:15:19,719 INFO L78 Accepts]: Start accepts. Automaton has 309 states and 329 transitions. Word has length 163 [2023-11-12 00:15:19,719 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:15:19,719 INFO L495 AbstractCegarLoop]: Abstraction has 309 states and 329 transitions. [2023-11-12 00:15:19,719 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) [2023-11-12 00:15:19,720 INFO L276 IsEmpty]: Start isEmpty. Operand 309 states and 329 transitions. [2023-11-12 00:15:19,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2023-11-12 00:15:19,724 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:15:19,724 INFO L195 NwaCegarLoop]: trace histogram [31, 31, 31, 30, 30, 30, 1, 1] [2023-11-12 00:15:19,730 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b08eb20d-7909-45c9-81b1-cc8b9d55d176/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-11-12 00:15:19,930 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b08eb20d-7909-45c9-81b1-cc8b9d55d176/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:15:19,930 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)] === [2023-11-12 00:15:19,930 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:15:19,931 INFO L85 PathProgramCache]: Analyzing trace with hash -1858413957, now seen corresponding path program 4 times [2023-11-12 00:15:19,931 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:15:19,931 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [9828734] [2023-11-12 00:15:19,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:15:19,931 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:15:20,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:15:21,081 INFO L134 CoverageAnalysis]: Checked inductivity of 2730 backedges. 0 proven. 2730 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 00:15:21,081 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:15:21,081 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [9828734] [2023-11-12 00:15:21,081 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [9828734] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 00:15:21,082 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1596861127] [2023-11-12 00:15:21,082 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-12 00:15:21,082 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:15:21,082 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b08eb20d-7909-45c9-81b1-cc8b9d55d176/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 00:15:21,085 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b08eb20d-7909-45c9-81b1-cc8b9d55d176/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 00:15:21,088 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b08eb20d-7909-45c9-81b1-cc8b9d55d176/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-12 00:15:21,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:15:21,169 INFO L262 TraceCheckSpWp]: Trace formula consists of 310 conjuncts, 32 conjunts are in the unsatisfiable core [2023-11-12 00:15:21,173 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 00:15:21,423 INFO L134 CoverageAnalysis]: Checked inductivity of 2730 backedges. 0 proven. 2730 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 00:15:21,424 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 00:15:23,175 INFO L134 CoverageAnalysis]: Checked inductivity of 2730 backedges. 0 proven. 2730 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 00:15:23,175 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1596861127] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 00:15:23,175 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1455213047] [2023-11-12 00:15:23,177 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2023-11-12 00:15:23,177 INFO L166 IcfgInterpreter]: Building call graph [2023-11-12 00:15:23,178 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-12 00:15:23,178 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-12 00:15:23,178 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-12 00:15:23,231 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-12 00:15:24,368 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 [2023-11-12 00:15:24,369 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-12 00:15:24,369 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-12 00:15:24,369 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31, 31] total 62 [2023-11-12 00:15:24,369 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1265533324] [2023-11-12 00:15:24,369 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-12 00:15:24,370 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 64 states [2023-11-12 00:15:24,370 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:15:24,372 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2023-11-12 00:15:24,374 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2031, Invalid=2661, Unknown=0, NotChecked=0, Total=4692 [2023-11-12 00:15:24,375 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) [2023-11-12 00:15:24,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:15:24,991 INFO L93 Difference]: Finished difference Result 1314 states and 1508 transitions. [2023-11-12 00:15:24,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2023-11-12 00:15:24,992 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 [2023-11-12 00:15:24,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:15:25,005 INFO L225 Difference]: With dead ends: 1314 [2023-11-12 00:15:25,005 INFO L226 Difference]: Without dead ends: 1313 [2023-11-12 00:15:25,007 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 [2023-11-12 00:15:25,008 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, 0.4s IncrementalHoareTripleChecker+Time [2023-11-12 00:15:25,010 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [164 Valid, 382 Invalid, 477 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 423 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-12 00:15:25,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1313 states. [2023-11-12 00:15:25,053 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1313 to 1279. [2023-11-12 00:15:25,056 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) [2023-11-12 00:15:25,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1279 states to 1279 states and 1454 transitions. [2023-11-12 00:15:25,063 INFO L78 Accepts]: Start accepts. Automaton has 1279 states and 1454 transitions. Word has length 185 [2023-11-12 00:15:25,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:15:25,064 INFO L495 AbstractCegarLoop]: Abstraction has 1279 states and 1454 transitions. [2023-11-12 00:15:25,064 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) [2023-11-12 00:15:25,065 INFO L276 IsEmpty]: Start isEmpty. Operand 1279 states and 1454 transitions. [2023-11-12 00:15:25,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 308 [2023-11-12 00:15:25,069 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:15:25,070 INFO L195 NwaCegarLoop]: trace histogram [51, 51, 50, 46, 46, 46, 5, 5, 5, 1, 1] [2023-11-12 00:15:25,080 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b08eb20d-7909-45c9-81b1-cc8b9d55d176/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-11-12 00:15:25,275 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b08eb20d-7909-45c9-81b1-cc8b9d55d176/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-11-12 00:15:25,276 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)] === [2023-11-12 00:15:25,276 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:15:25,276 INFO L85 PathProgramCache]: Analyzing trace with hash 829290183, now seen corresponding path program 5 times [2023-11-12 00:15:25,276 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:15:25,276 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1474826872] [2023-11-12 00:15:25,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:15:25,277 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:15:25,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:15:27,785 INFO L134 CoverageAnalysis]: Checked inductivity of 7190 backedges. 836 proven. 6302 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2023-11-12 00:15:27,785 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:15:27,785 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1474826872] [2023-11-12 00:15:27,785 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1474826872] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 00:15:27,785 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1061492258] [2023-11-12 00:15:27,786 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-12 00:15:27,786 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:15:27,786 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b08eb20d-7909-45c9-81b1-cc8b9d55d176/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 00:15:27,787 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b08eb20d-7909-45c9-81b1-cc8b9d55d176/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 00:15:27,823 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b08eb20d-7909-45c9-81b1-cc8b9d55d176/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-12 00:15:27,862 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2023-11-12 00:15:27,863 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-12 00:15:27,864 INFO L262 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-12 00:15:27,869 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 00:15:28,223 INFO L134 CoverageAnalysis]: Checked inductivity of 7190 backedges. 1090 proven. 70 refuted. 0 times theorem prover too weak. 6030 trivial. 0 not checked. [2023-11-12 00:15:28,223 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 00:15:28,593 INFO L134 CoverageAnalysis]: Checked inductivity of 7190 backedges. 1090 proven. 70 refuted. 0 times theorem prover too weak. 6030 trivial. 0 not checked. [2023-11-12 00:15:28,594 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1061492258] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 00:15:28,594 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [191277823] [2023-11-12 00:15:28,596 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2023-11-12 00:15:28,596 INFO L166 IcfgInterpreter]: Building call graph [2023-11-12 00:15:28,597 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-12 00:15:28,597 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-12 00:15:28,597 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-12 00:15:28,673 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-12 00:15:30,753 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '19255#(<= 2147483647 |ULTIMATE.start_main_~x~0#1|)' at error location [2023-11-12 00:15:30,753 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-12 00:15:30,753 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-12 00:15:30,754 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 7, 7] total 61 [2023-11-12 00:15:30,754 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [312965487] [2023-11-12 00:15:30,754 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-12 00:15:30,755 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 61 states [2023-11-12 00:15:30,755 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:15:30,757 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2023-11-12 00:15:30,758 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1867, Invalid=2689, Unknown=0, NotChecked=0, Total=4556 [2023-11-12 00:15:30,759 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) [2023-11-12 00:15:31,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:15:31,214 INFO L93 Difference]: Finished difference Result 3277 states and 3958 transitions. [2023-11-12 00:15:31,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2023-11-12 00:15:31,215 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 [2023-11-12 00:15:31,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:15:31,231 INFO L225 Difference]: With dead ends: 3277 [2023-11-12 00:15:31,231 INFO L226 Difference]: Without dead ends: 2271 [2023-11-12 00:15:31,239 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 967 GetRequests, 855 SyntacticMatches, 46 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3720 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=1867, Invalid=2689, Unknown=0, NotChecked=0, Total=4556 [2023-11-12 00:15:31,239 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 [2023-11-12 00:15:31,240 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] [2023-11-12 00:15:31,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2271 states. [2023-11-12 00:15:31,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2271 to 2271. [2023-11-12 00:15:31,351 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) [2023-11-12 00:15:31,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2271 states to 2271 states and 2607 transitions. [2023-11-12 00:15:31,360 INFO L78 Accepts]: Start accepts. Automaton has 2271 states and 2607 transitions. Word has length 307 [2023-11-12 00:15:31,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:15:31,360 INFO L495 AbstractCegarLoop]: Abstraction has 2271 states and 2607 transitions. [2023-11-12 00:15:31,361 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) [2023-11-12 00:15:31,361 INFO L276 IsEmpty]: Start isEmpty. Operand 2271 states and 2607 transitions. [2023-11-12 00:15:31,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 362 [2023-11-12 00:15:31,368 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:15:31,369 INFO L195 NwaCegarLoop]: trace histogram [60, 60, 59, 48, 48, 48, 12, 12, 12, 1, 1] [2023-11-12 00:15:31,377 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b08eb20d-7909-45c9-81b1-cc8b9d55d176/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-11-12 00:15:31,574 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b08eb20d-7909-45c9-81b1-cc8b9d55d176/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-11-12 00:15:31,574 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)] === [2023-11-12 00:15:31,574 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:15:31,575 INFO L85 PathProgramCache]: Analyzing trace with hash 1306662320, now seen corresponding path program 6 times [2023-11-12 00:15:31,575 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:15:31,575 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1256822523] [2023-11-12 00:15:31,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:15:31,576 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:15:31,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:15:34,210 INFO L134 CoverageAnalysis]: Checked inductivity of 9468 backedges. 2230 proven. 6864 refuted. 0 times theorem prover too weak. 374 trivial. 0 not checked. [2023-11-12 00:15:34,211 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:15:34,211 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1256822523] [2023-11-12 00:15:34,211 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1256822523] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 00:15:34,211 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1342322435] [2023-11-12 00:15:34,211 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-12 00:15:34,212 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:15:34,212 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b08eb20d-7909-45c9-81b1-cc8b9d55d176/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 00:15:34,213 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b08eb20d-7909-45c9-81b1-cc8b9d55d176/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 00:15:34,215 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b08eb20d-7909-45c9-81b1-cc8b9d55d176/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-11-12 00:15:34,348 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-12 00:15:34,348 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-12 00:15:34,352 INFO L262 TraceCheckSpWp]: Trace formula consists of 604 conjuncts, 50 conjunts are in the unsatisfiable core [2023-11-12 00:15:34,361 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 00:15:34,759 INFO L134 CoverageAnalysis]: Checked inductivity of 9468 backedges. 2230 proven. 6864 refuted. 0 times theorem prover too weak. 374 trivial. 0 not checked. [2023-11-12 00:15:34,760 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 00:15:36,341 INFO L134 CoverageAnalysis]: Checked inductivity of 9468 backedges. 2230 proven. 6864 refuted. 0 times theorem prover too weak. 374 trivial. 0 not checked. [2023-11-12 00:15:36,341 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1342322435] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 00:15:36,341 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [590036879] [2023-11-12 00:15:36,343 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2023-11-12 00:15:36,344 INFO L166 IcfgInterpreter]: Building call graph [2023-11-12 00:15:36,344 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-12 00:15:36,344 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-12 00:15:36,344 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-12 00:15:36,417 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-12 00:15:38,537 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '27902#(<= 2147483647 |ULTIMATE.start_main_~x~0#1|)' at error location [2023-11-12 00:15:38,538 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-12 00:15:38,538 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-12 00:15:38,538 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 50, 50] total 52 [2023-11-12 00:15:38,538 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1777378467] [2023-11-12 00:15:38,538 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-12 00:15:38,540 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2023-11-12 00:15:38,540 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:15:38,541 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2023-11-12 00:15:38,542 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1404, Invalid=2136, Unknown=0, NotChecked=0, Total=3540 [2023-11-12 00:15:38,543 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) [2023-11-12 00:15:38,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:15:38,833 INFO L93 Difference]: Finished difference Result 4275 states and 4950 transitions. [2023-11-12 00:15:38,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2023-11-12 00:15:38,834 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 [2023-11-12 00:15:38,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:15:38,846 INFO L225 Difference]: With dead ends: 4275 [2023-11-12 00:15:38,846 INFO L226 Difference]: Without dead ends: 2289 [2023-11-12 00:15:38,851 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 [2023-11-12 00:15:38,851 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 [2023-11-12 00:15:38,852 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] [2023-11-12 00:15:38,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2289 states. [2023-11-12 00:15:38,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2289 to 2289. [2023-11-12 00:15:38,983 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) [2023-11-12 00:15:38,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2289 states to 2289 states and 2625 transitions. [2023-11-12 00:15:38,992 INFO L78 Accepts]: Start accepts. Automaton has 2289 states and 2625 transitions. Word has length 361 [2023-11-12 00:15:38,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:15:38,992 INFO L495 AbstractCegarLoop]: Abstraction has 2289 states and 2625 transitions. [2023-11-12 00:15:38,993 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) [2023-11-12 00:15:38,993 INFO L276 IsEmpty]: Start isEmpty. Operand 2289 states and 2625 transitions. [2023-11-12 00:15:39,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 378 [2023-11-12 00:15:39,001 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:15:39,001 INFO L195 NwaCegarLoop]: trace histogram [63, 63, 63, 62, 62, 62, 1, 1] [2023-11-12 00:15:39,008 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b08eb20d-7909-45c9-81b1-cc8b9d55d176/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-11-12 00:15:39,208 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b08eb20d-7909-45c9-81b1-cc8b9d55d176/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-11-12 00:15:39,209 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)] === [2023-11-12 00:15:39,209 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:15:39,210 INFO L85 PathProgramCache]: Analyzing trace with hash -1330253989, now seen corresponding path program 5 times [2023-11-12 00:15:39,210 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:15:39,210 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1068911139] [2023-11-12 00:15:39,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:15:39,210 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:15:39,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:15:43,275 INFO L134 CoverageAnalysis]: Checked inductivity of 11594 backedges. 0 proven. 11594 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 00:15:43,276 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:15:43,276 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1068911139] [2023-11-12 00:15:43,276 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1068911139] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 00:15:43,276 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1620840969] [2023-11-12 00:15:43,276 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-12 00:15:43,277 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:15:43,277 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b08eb20d-7909-45c9-81b1-cc8b9d55d176/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 00:15:43,278 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b08eb20d-7909-45c9-81b1-cc8b9d55d176/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 00:15:43,280 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b08eb20d-7909-45c9-81b1-cc8b9d55d176/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-11-12 00:15:43,504 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 63 check-sat command(s) [2023-11-12 00:15:43,504 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-12 00:15:43,508 INFO L262 TraceCheckSpWp]: Trace formula consists of 630 conjuncts, 64 conjunts are in the unsatisfiable core [2023-11-12 00:15:43,514 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 00:15:44,009 INFO L134 CoverageAnalysis]: Checked inductivity of 11594 backedges. 0 proven. 11594 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 00:15:44,010 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 00:15:49,539 INFO L134 CoverageAnalysis]: Checked inductivity of 11594 backedges. 0 proven. 11594 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 00:15:49,540 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1620840969] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 00:15:49,540 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1356463730] [2023-11-12 00:15:49,542 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2023-11-12 00:15:49,542 INFO L166 IcfgInterpreter]: Building call graph [2023-11-12 00:15:49,542 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-12 00:15:49,543 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-12 00:15:49,543 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-12 00:15:49,588 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-12 00:15:52,877 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '37910#(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 [2023-11-12 00:15:52,877 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-12 00:15:52,877 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-12 00:15:52,878 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [63, 63, 63] total 126 [2023-11-12 00:15:52,878 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1350150932] [2023-11-12 00:15:52,878 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-12 00:15:52,880 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 128 states [2023-11-12 00:15:52,880 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:15:52,884 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 128 interpolants. [2023-11-12 00:15:52,890 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8143, Invalid=9413, Unknown=0, NotChecked=0, Total=17556 [2023-11-12 00:15:52,891 INFO L87 Difference]: Start difference. First operand 2289 states and 2625 transitions. Second operand has 128 states, 127 states have (on average 5.937007874015748) internal successors, (754), 127 states have internal predecessors, (754), 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)