./Ultimate.py --spec ../../sv-benchmarks/c/properties/no-overflow.prp --file ../../sv-benchmarks/c/termination-crafted/LexIndexValue-Pointer-1.c --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for overflows Using default analysis Version cf1a7837 Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0c1b97f-bf7a-46f2-8360-cbca2430335b/bin/utaipan-verify-NcY6lQBIFX/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0c1b97f-bf7a-46f2-8360-cbca2430335b/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_c0c1b97f-bf7a-46f2-8360-cbca2430335b/bin/utaipan-verify-NcY6lQBIFX/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0c1b97f-bf7a-46f2-8360-cbca2430335b/bin/utaipan-verify-NcY6lQBIFX/config/TaipanReach.xml -i ../../sv-benchmarks/c/termination-crafted/LexIndexValue-Pointer-1.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0c1b97f-bf7a-46f2-8360-cbca2430335b/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_c0c1b97f-bf7a-46f2-8360-cbca2430335b/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 c47e45e477fce3150ee146c7ef7679da7b29387c5fdc0f2faaf105b700984947 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-cf1a783 [2023-11-12 01:00:23,934 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-12 01:00:24,006 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0c1b97f-bf7a-46f2-8360-cbca2430335b/bin/utaipan-verify-NcY6lQBIFX/config/svcomp-Overflow-64bit-Taipan_Default.epf [2023-11-12 01:00:24,012 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-12 01:00:24,012 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-12 01:00:24,040 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-12 01:00:24,041 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-12 01:00:24,042 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-12 01:00:24,043 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-12 01:00:24,043 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-12 01:00:24,044 INFO L153 SettingsManager]: * User list type=DISABLED [2023-11-12 01:00:24,045 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-11-12 01:00:24,045 INFO L153 SettingsManager]: * Explicit value domain=true [2023-11-12 01:00:24,046 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-11-12 01:00:24,047 INFO L153 SettingsManager]: * Octagon Domain=false [2023-11-12 01:00:24,047 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-11-12 01:00:24,048 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-11-12 01:00:24,049 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-11-12 01:00:24,049 INFO L153 SettingsManager]: * Interval Domain=false [2023-11-12 01:00:24,050 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-11-12 01:00:24,051 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-11-12 01:00:24,051 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-11-12 01:00:24,052 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-12 01:00:24,053 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-12 01:00:24,054 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-12 01:00:24,054 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-12 01:00:24,055 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-12 01:00:24,055 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-12 01:00:24,056 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-12 01:00:24,057 INFO L153 SettingsManager]: * Check absence of signed integer overflows=true [2023-11-12 01:00:24,057 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-12 01:00:24,058 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-12 01:00:24,058 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-12 01:00:24,059 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-12 01:00:24,059 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-12 01:00:24,059 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-12 01:00:24,060 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-12 01:00:24,060 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-12 01:00:24,061 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-12 01:00:24,061 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-11-12 01:00:24,061 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-12 01:00:24,062 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-12 01:00:24,062 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-11-12 01:00:24,063 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-12 01:00:24,063 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_c0c1b97f-bf7a-46f2-8360-cbca2430335b/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0c1b97f-bf7a-46f2-8360-cbca2430335b/bin/utaipan-verify-NcY6lQBIFX Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! overflow) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c47e45e477fce3150ee146c7ef7679da7b29387c5fdc0f2faaf105b700984947 [2023-11-12 01:00:24,376 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-12 01:00:24,400 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-12 01:00:24,403 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-12 01:00:24,404 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-12 01:00:24,405 INFO L274 PluginConnector]: CDTParser initialized [2023-11-12 01:00:24,406 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0c1b97f-bf7a-46f2-8360-cbca2430335b/bin/utaipan-verify-NcY6lQBIFX/../../sv-benchmarks/c/termination-crafted/LexIndexValue-Pointer-1.c [2023-11-12 01:00:27,567 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-12 01:00:27,833 INFO L384 CDTParser]: Found 1 translation units. [2023-11-12 01:00:27,833 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0c1b97f-bf7a-46f2-8360-cbca2430335b/sv-benchmarks/c/termination-crafted/LexIndexValue-Pointer-1.c [2023-11-12 01:00:27,841 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0c1b97f-bf7a-46f2-8360-cbca2430335b/bin/utaipan-verify-NcY6lQBIFX/data/c3bbfac30/88cd670e37eb40ca94a886c7d738495d/FLAGfcb337ad3 [2023-11-12 01:00:28,198 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0c1b97f-bf7a-46f2-8360-cbca2430335b/bin/utaipan-verify-NcY6lQBIFX/data/c3bbfac30/88cd670e37eb40ca94a886c7d738495d [2023-11-12 01:00:28,201 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-12 01:00:28,205 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-12 01:00:28,208 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-12 01:00:28,209 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-12 01:00:28,214 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-12 01:00:28,215 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 01:00:28" (1/1) ... [2023-11-12 01:00:28,216 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@51bab0de and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 01:00:28, skipping insertion in model container [2023-11-12 01:00:28,216 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 01:00:28" (1/1) ... [2023-11-12 01:00:28,236 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-12 01:00:28,402 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-12 01:00:28,412 INFO L202 MainTranslator]: Completed pre-run [2023-11-12 01:00:28,425 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-12 01:00:28,441 INFO L206 MainTranslator]: Completed translation [2023-11-12 01:00:28,442 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 01:00:28 WrapperNode [2023-11-12 01:00:28,442 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-12 01:00:28,443 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-12 01:00:28,443 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-12 01:00:28,444 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-12 01:00:28,451 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 01:00:28" (1/1) ... [2023-11-12 01:00:28,457 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 01:00:28" (1/1) ... [2023-11-12 01:00:28,473 INFO L138 Inliner]: procedures = 9, calls = 7, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 53 [2023-11-12 01:00:28,473 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-12 01:00:28,474 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-12 01:00:28,474 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-12 01:00:28,474 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-12 01:00:28,482 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 01:00:28" (1/1) ... [2023-11-12 01:00:28,482 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 01:00:28" (1/1) ... [2023-11-12 01:00:28,484 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 01:00:28" (1/1) ... [2023-11-12 01:00:28,484 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 01:00:28" (1/1) ... [2023-11-12 01:00:28,495 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 01:00:28" (1/1) ... [2023-11-12 01:00:28,499 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 01:00:28" (1/1) ... [2023-11-12 01:00:28,500 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 01:00:28" (1/1) ... [2023-11-12 01:00:28,510 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 01:00:28" (1/1) ... [2023-11-12 01:00:28,513 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-12 01:00:28,514 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-12 01:00:28,514 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-12 01:00:28,514 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-12 01:00:28,515 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 01:00:28" (1/1) ... [2023-11-12 01:00:28,520 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-12 01:00:28,531 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0c1b97f-bf7a-46f2-8360-cbca2430335b/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 01:00:28,544 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0c1b97f-bf7a-46f2-8360-cbca2430335b/bin/utaipan-verify-NcY6lQBIFX/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-12 01:00:28,577 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0c1b97f-bf7a-46f2-8360-cbca2430335b/bin/utaipan-verify-NcY6lQBIFX/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-12 01:00:28,599 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-12 01:00:28,599 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-12 01:00:28,599 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-12 01:00:28,599 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-12 01:00:28,600 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-12 01:00:28,670 INFO L236 CfgBuilder]: Building ICFG [2023-11-12 01:00:28,673 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-12 01:00:28,805 INFO L277 CfgBuilder]: Performing block encoding [2023-11-12 01:00:28,843 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-12 01:00:28,843 INFO L302 CfgBuilder]: Removed 2 assume(true) statements. [2023-11-12 01:00:28,846 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 01:00:28 BoogieIcfgContainer [2023-11-12 01:00:28,846 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-12 01:00:28,849 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-12 01:00:28,849 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-12 01:00:28,853 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-12 01:00:28,853 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.11 01:00:28" (1/3) ... [2023-11-12 01:00:28,854 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@463d8ba9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 01:00:28, skipping insertion in model container [2023-11-12 01:00:28,854 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 01:00:28" (2/3) ... [2023-11-12 01:00:28,854 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@463d8ba9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 01:00:28, skipping insertion in model container [2023-11-12 01:00:28,854 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 01:00:28" (3/3) ... [2023-11-12 01:00:28,856 INFO L112 eAbstractionObserver]: Analyzing ICFG LexIndexValue-Pointer-1.c [2023-11-12 01:00:28,872 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-12 01:00:28,873 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 4 error locations. [2023-11-12 01:00:28,916 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-12 01:00:28,922 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;@416327d, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-12 01:00:28,922 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2023-11-12 01:00:28,926 INFO L276 IsEmpty]: Start isEmpty. Operand has 15 states, 10 states have (on average 1.8) internal successors, (18), 14 states have internal predecessors, (18), 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 01:00:28,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2023-11-12 01:00:28,931 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 01:00:28,931 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2023-11-12 01:00:28,932 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 1 more)] === [2023-11-12 01:00:28,938 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 01:00:28,938 INFO L85 PathProgramCache]: Analyzing trace with hash 85294, now seen corresponding path program 1 times [2023-11-12 01:00:28,947 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 01:00:28,948 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2764491] [2023-11-12 01:00:28,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 01:00:28,949 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 01:00:29,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 01:00:29,173 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 01:00:29,174 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 01:00:29,174 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2764491] [2023-11-12 01:00:29,175 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2764491] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 01:00:29,176 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 01:00:29,176 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-12 01:00:29,178 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1816830384] [2023-11-12 01:00:29,179 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 01:00:29,184 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-12 01:00:29,184 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 01:00:29,219 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-12 01:00:29,220 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-12 01:00:29,222 INFO L87 Difference]: Start difference. First operand has 15 states, 10 states have (on average 1.8) internal successors, (18), 14 states have internal predecessors, (18), 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 4 states, 3 states have (on average 1.0) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 01:00:29,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 01:00:29,345 INFO L93 Difference]: Finished difference Result 29 states and 35 transitions. [2023-11-12 01:00:29,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-12 01:00:29,350 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 1.0) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 3 [2023-11-12 01:00:29,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 01:00:29,362 INFO L225 Difference]: With dead ends: 29 [2023-11-12 01:00:29,363 INFO L226 Difference]: Without dead ends: 16 [2023-11-12 01:00:29,366 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-12 01:00:29,373 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 3 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-12 01:00:29,375 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 29 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-12 01:00:29,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2023-11-12 01:00:29,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2023-11-12 01:00:29,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 12 states have (on average 1.5) internal successors, (18), 15 states have internal predecessors, (18), 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 01:00:29,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 18 transitions. [2023-11-12 01:00:29,411 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 18 transitions. Word has length 3 [2023-11-12 01:00:29,412 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 01:00:29,412 INFO L495 AbstractCegarLoop]: Abstraction has 16 states and 18 transitions. [2023-11-12 01:00:29,413 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 1.0) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 01:00:29,413 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 18 transitions. [2023-11-12 01:00:29,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2023-11-12 01:00:29,416 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 01:00:29,416 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1] [2023-11-12 01:00:29,416 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-12 01:00:29,417 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 1 more)] === [2023-11-12 01:00:29,418 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 01:00:29,419 INFO L85 PathProgramCache]: Analyzing trace with hash -1753926888, now seen corresponding path program 1 times [2023-11-12 01:00:29,419 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 01:00:29,419 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2037057631] [2023-11-12 01:00:29,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 01:00:29,420 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 01:00:29,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 01:00:29,564 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 01:00:29,565 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 01:00:29,565 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2037057631] [2023-11-12 01:00:29,565 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2037057631] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 01:00:29,565 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1724436056] [2023-11-12 01:00:29,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 01:00:29,566 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 01:00:29,566 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0c1b97f-bf7a-46f2-8360-cbca2430335b/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 01:00:29,570 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0c1b97f-bf7a-46f2-8360-cbca2430335b/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 01:00:29,605 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0c1b97f-bf7a-46f2-8360-cbca2430335b/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-12 01:00:29,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 01:00:29,663 INFO L262 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-12 01:00:29,668 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 01:00:29,762 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 01:00:29,762 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-12 01:00:29,762 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1724436056] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 01:00:29,762 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-12 01:00:29,763 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2023-11-12 01:00:29,763 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [315575889] [2023-11-12 01:00:29,764 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 01:00:29,764 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-12 01:00:29,765 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 01:00:29,765 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-12 01:00:29,766 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2023-11-12 01:00:29,766 INFO L87 Difference]: Start difference. First operand 16 states and 18 transitions. Second operand has 6 states, 5 states have (on average 1.2) internal successors, (6), 5 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 01:00:29,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 01:00:29,836 INFO L93 Difference]: Finished difference Result 16 states and 18 transitions. [2023-11-12 01:00:29,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-12 01:00:29,839 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 1.2) internal successors, (6), 5 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 01:00:29,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 01:00:29,840 INFO L225 Difference]: With dead ends: 16 [2023-11-12 01:00:29,840 INFO L226 Difference]: Without dead ends: 15 [2023-11-12 01:00:29,841 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2023-11-12 01:00:29,842 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 9 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-12 01:00:29,843 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 21 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-12 01:00:29,861 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2023-11-12 01:00:29,863 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2023-11-12 01:00:29,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 12 states have (on average 1.4166666666666667) internal successors, (17), 14 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 01:00:29,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 17 transitions. [2023-11-12 01:00:29,870 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 17 transitions. Word has length 6 [2023-11-12 01:00:29,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 01:00:29,870 INFO L495 AbstractCegarLoop]: Abstraction has 15 states and 17 transitions. [2023-11-12 01:00:29,870 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 1.2) internal successors, (6), 5 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 01:00:29,870 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 17 transitions. [2023-11-12 01:00:29,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2023-11-12 01:00:29,871 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 01:00:29,871 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1] [2023-11-12 01:00:29,887 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0c1b97f-bf7a-46f2-8360-cbca2430335b/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-12 01:00:30,077 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0c1b97f-bf7a-46f2-8360-cbca2430335b/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 01:00:30,078 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 1 more)] === [2023-11-12 01:00:30,079 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 01:00:30,079 INFO L85 PathProgramCache]: Analyzing trace with hash 1462841366, now seen corresponding path program 1 times [2023-11-12 01:00:30,079 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 01:00:30,079 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1735285339] [2023-11-12 01:00:30,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 01:00:30,080 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 01:00:30,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 01:00:30,170 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-12 01:00:30,171 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 01:00:30,171 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1735285339] [2023-11-12 01:00:30,171 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1735285339] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 01:00:30,171 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 01:00:30,171 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-12 01:00:30,172 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2072805895] [2023-11-12 01:00:30,172 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 01:00:30,172 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-12 01:00:30,172 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 01:00:30,173 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-12 01:00:30,173 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 01:00:30,173 INFO L87 Difference]: Start difference. First operand 15 states and 17 transitions. Second operand has 3 states, 2 states have (on average 3.5) internal successors, (7), 3 states have internal predecessors, (7), 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 01:00:30,187 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 01:00:30,187 INFO L93 Difference]: Finished difference Result 15 states and 17 transitions. [2023-11-12 01:00:30,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-12 01:00:30,188 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 3 states have internal predecessors, (7), 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 7 [2023-11-12 01:00:30,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 01:00:30,188 INFO L225 Difference]: With dead ends: 15 [2023-11-12 01:00:30,189 INFO L226 Difference]: Without dead ends: 14 [2023-11-12 01:00:30,189 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 01:00:30,190 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 0 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 14 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-12 01:00:30,191 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 14 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-12 01:00:30,192 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2023-11-12 01:00:30,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 12. [2023-11-12 01:00:30,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12 states, 10 states have (on average 1.4) internal successors, (14), 11 states have internal predecessors, (14), 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 01:00:30,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 14 transitions. [2023-11-12 01:00:30,195 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 14 transitions. Word has length 7 [2023-11-12 01:00:30,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 01:00:30,196 INFO L495 AbstractCegarLoop]: Abstraction has 12 states and 14 transitions. [2023-11-12 01:00:30,196 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 3 states have internal predecessors, (7), 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 01:00:30,196 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 14 transitions. [2023-11-12 01:00:30,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2023-11-12 01:00:30,197 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 01:00:30,197 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 01:00:30,197 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-12 01:00:30,197 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 1 more)] === [2023-11-12 01:00:30,198 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 01:00:30,198 INFO L85 PathProgramCache]: Analyzing trace with hash 1344073670, now seen corresponding path program 1 times [2023-11-12 01:00:30,198 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 01:00:30,198 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1390923221] [2023-11-12 01:00:30,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 01:00:30,199 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 01:00:30,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 01:00:30,296 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 01:00:30,296 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 01:00:30,297 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1390923221] [2023-11-12 01:00:30,297 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1390923221] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 01:00:30,297 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [779547917] [2023-11-12 01:00:30,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 01:00:30,297 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 01:00:30,298 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0c1b97f-bf7a-46f2-8360-cbca2430335b/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 01:00:30,299 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0c1b97f-bf7a-46f2-8360-cbca2430335b/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 01:00:30,326 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0c1b97f-bf7a-46f2-8360-cbca2430335b/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-12 01:00:30,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 01:00:30,377 INFO L262 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-12 01:00:30,378 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 01:00:30,414 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 01:00:30,414 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 01:00:30,451 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 01:00:30,452 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [779547917] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 01:00:30,452 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1696140581] [2023-11-12 01:00:30,489 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2023-11-12 01:00:30,490 INFO L166 IcfgInterpreter]: Building call graph [2023-11-12 01:00:30,495 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-12 01:00:30,501 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-12 01:00:30,501 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-12 01:00:31,295 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-12 01:00:31,754 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSifa [1696140581] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 01:00:31,754 INFO L185 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2023-11-12 01:00:31,754 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [4, 4, 4] total 16 [2023-11-12 01:00:31,755 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [148382035] [2023-11-12 01:00:31,755 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 01:00:31,755 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-12 01:00:31,756 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 01:00:31,756 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-12 01:00:31,757 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2023-11-12 01:00:31,757 INFO L87 Difference]: Start difference. First operand 12 states and 14 transitions. Second operand has 9 states, 8 states have (on average 1.125) internal successors, (9), 8 states have internal predecessors, (9), 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 01:00:32,051 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 01:00:32,051 INFO L93 Difference]: Finished difference Result 19 states and 22 transitions. [2023-11-12 01:00:32,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-12 01:00:32,052 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 1.125) internal successors, (9), 8 states have internal predecessors, (9), 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 9 [2023-11-12 01:00:32,052 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 01:00:32,053 INFO L225 Difference]: With dead ends: 19 [2023-11-12 01:00:32,053 INFO L226 Difference]: Without dead ends: 18 [2023-11-12 01:00:32,054 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=62, Invalid=280, Unknown=0, NotChecked=0, Total=342 [2023-11-12 01:00:32,055 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 7 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 81 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 10 SdHoareTripleChecker+Invalid, 82 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 81 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-12 01:00:32,056 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 10 Invalid, 82 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 81 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-12 01:00:32,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2023-11-12 01:00:32,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 17. [2023-11-12 01:00:32,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 15 states have (on average 1.4) internal successors, (21), 16 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 01:00:32,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 21 transitions. [2023-11-12 01:00:32,062 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 21 transitions. Word has length 9 [2023-11-12 01:00:32,062 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 01:00:32,062 INFO L495 AbstractCegarLoop]: Abstraction has 17 states and 21 transitions. [2023-11-12 01:00:32,062 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 1.125) internal successors, (9), 8 states have internal predecessors, (9), 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 01:00:32,063 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 21 transitions. [2023-11-12 01:00:32,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2023-11-12 01:00:32,063 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 01:00:32,063 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 01:00:32,073 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0c1b97f-bf7a-46f2-8360-cbca2430335b/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-11-12 01:00:32,268 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0c1b97f-bf7a-46f2-8360-cbca2430335b/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 01:00:32,268 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 1 more)] === [2023-11-12 01:00:32,269 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 01:00:32,269 INFO L85 PathProgramCache]: Analyzing trace with hash -1283389115, now seen corresponding path program 1 times [2023-11-12 01:00:32,269 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 01:00:32,270 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2068217540] [2023-11-12 01:00:32,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 01:00:32,270 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 01:00:32,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 01:00:32,385 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 01:00:32,385 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 01:00:32,385 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2068217540] [2023-11-12 01:00:32,385 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2068217540] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 01:00:32,386 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1560903240] [2023-11-12 01:00:32,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 01:00:32,386 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 01:00:32,386 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0c1b97f-bf7a-46f2-8360-cbca2430335b/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 01:00:32,389 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0c1b97f-bf7a-46f2-8360-cbca2430335b/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 01:00:32,405 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0c1b97f-bf7a-46f2-8360-cbca2430335b/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-12 01:00:32,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 01:00:32,455 INFO L262 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-12 01:00:32,457 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 01:00:32,478 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 01:00:32,478 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 01:00:32,508 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 01:00:32,509 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1560903240] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 01:00:32,510 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [353618982] [2023-11-12 01:00:32,516 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2023-11-12 01:00:32,517 INFO L166 IcfgInterpreter]: Building call graph [2023-11-12 01:00:32,517 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-12 01:00:32,517 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-12 01:00:32,518 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-12 01:00:32,924 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-12 01:00:33,372 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '353#(and (= |ULTIMATE.start_main_#t~mem7#1| |ULTIMATE.start_main_#t~post8#1|) (<= 1 |#StackHeapBarrier|) (<= 2147483649 |ULTIMATE.start_main_#t~post8#1|) (= |ULTIMATE.start_main_~q~0#1.base| |ULTIMATE.start_main_~p~0#1.base|) (= (select (select |#memory_int| |ULTIMATE.start_main_~q~0#1.base|) 0) |ULTIMATE.start_main_#t~mem7#1|) (= |ULTIMATE.start_main_~p~0#1.offset| 0) (= |ULTIMATE.start_main_~q~0#1.offset| 0))' at error location [2023-11-12 01:00:33,373 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-12 01:00:33,373 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-12 01:00:33,373 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 9 [2023-11-12 01:00:33,373 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [323757724] [2023-11-12 01:00:33,373 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-12 01:00:33,374 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-12 01:00:33,374 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 01:00:33,375 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-12 01:00:33,375 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=252, Unknown=0, NotChecked=0, Total=306 [2023-11-12 01:00:33,376 INFO L87 Difference]: Start difference. First operand 17 states and 21 transitions. Second operand has 10 states, 10 states have (on average 1.9) internal successors, (19), 9 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 01:00:33,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 01:00:33,444 INFO L93 Difference]: Finished difference Result 35 states and 44 transitions. [2023-11-12 01:00:33,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-12 01:00:33,445 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 9 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2023-11-12 01:00:33,445 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 01:00:33,446 INFO L225 Difference]: With dead ends: 35 [2023-11-12 01:00:33,446 INFO L226 Difference]: Without dead ends: 23 [2023-11-12 01:00:33,446 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=71, Invalid=309, Unknown=0, NotChecked=0, Total=380 [2023-11-12 01:00:33,448 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 10 mSDsluCounter, 43 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-12 01:00:33,454 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 50 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-12 01:00:33,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2023-11-12 01:00:33,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2023-11-12 01:00:33,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 21 states have (on average 1.2857142857142858) internal successors, (27), 22 states have internal predecessors, (27), 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 01:00:33,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 27 transitions. [2023-11-12 01:00:33,467 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 27 transitions. Word has length 10 [2023-11-12 01:00:33,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 01:00:33,468 INFO L495 AbstractCegarLoop]: Abstraction has 23 states and 27 transitions. [2023-11-12 01:00:33,468 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 9 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 01:00:33,468 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 27 transitions. [2023-11-12 01:00:33,469 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2023-11-12 01:00:33,469 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 01:00:33,469 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 01:00:33,476 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0c1b97f-bf7a-46f2-8360-cbca2430335b/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-12 01:00:33,675 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0c1b97f-bf7a-46f2-8360-cbca2430335b/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 01:00:33,676 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 1 more)] === [2023-11-12 01:00:33,677 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 01:00:33,677 INFO L85 PathProgramCache]: Analyzing trace with hash -1773563515, now seen corresponding path program 2 times [2023-11-12 01:00:33,677 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 01:00:33,677 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1141979551] [2023-11-12 01:00:33,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 01:00:33,677 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 01:00:33,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 01:00:33,863 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 01:00:33,864 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 01:00:33,864 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1141979551] [2023-11-12 01:00:33,864 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1141979551] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 01:00:33,864 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1393471325] [2023-11-12 01:00:33,864 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-12 01:00:33,864 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 01:00:33,865 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0c1b97f-bf7a-46f2-8360-cbca2430335b/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 01:00:33,866 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0c1b97f-bf7a-46f2-8360-cbca2430335b/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 01:00:33,896 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0c1b97f-bf7a-46f2-8360-cbca2430335b/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-12 01:00:33,935 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-11-12 01:00:33,935 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-12 01:00:33,936 INFO L262 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-12 01:00:33,938 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 01:00:33,976 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 01:00:33,976 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 01:00:34,080 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 01:00:34,081 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1393471325] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 01:00:34,081 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1527497835] [2023-11-12 01:00:34,085 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2023-11-12 01:00:34,085 INFO L166 IcfgInterpreter]: Building call graph [2023-11-12 01:00:34,085 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-12 01:00:34,085 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-12 01:00:34,086 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-12 01:00:34,381 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-12 01:00:34,654 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '545#(and (= |ULTIMATE.start_main_#t~mem7#1| |ULTIMATE.start_main_#t~post8#1|) (<= 1 |#StackHeapBarrier|) (<= 2147483649 |ULTIMATE.start_main_#t~post8#1|) (= |ULTIMATE.start_main_~q~0#1.base| |ULTIMATE.start_main_~p~0#1.base|) (= (select (select |#memory_int| |ULTIMATE.start_main_~q~0#1.base|) 0) |ULTIMATE.start_main_#t~mem7#1|) (= |ULTIMATE.start_main_~p~0#1.offset| 0) (= |ULTIMATE.start_main_~q~0#1.offset| 0))' at error location [2023-11-12 01:00:34,654 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-12 01:00:34,655 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-12 01:00:34,655 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 17 [2023-11-12 01:00:34,655 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [249076932] [2023-11-12 01:00:34,655 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-12 01:00:34,656 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-11-12 01:00:34,656 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 01:00:34,656 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-11-12 01:00:34,657 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=536, Unknown=0, NotChecked=0, Total=650 [2023-11-12 01:00:34,657 INFO L87 Difference]: Start difference. First operand 23 states and 27 transitions. Second operand has 18 states, 18 states have (on average 1.7222222222222223) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 01:00:34,816 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 01:00:34,816 INFO L93 Difference]: Finished difference Result 47 states and 58 transitions. [2023-11-12 01:00:34,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-11-12 01:00:34,817 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.7222222222222223) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2023-11-12 01:00:34,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 01:00:34,818 INFO L225 Difference]: With dead ends: 47 [2023-11-12 01:00:34,818 INFO L226 Difference]: Without dead ends: 35 [2023-11-12 01:00:34,819 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 332 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=195, Invalid=797, Unknown=0, NotChecked=0, Total=992 [2023-11-12 01:00:34,820 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 40 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 60 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-12 01:00:34,820 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [40 Valid, 43 Invalid, 60 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 59 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-12 01:00:34,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2023-11-12 01:00:34,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2023-11-12 01:00:34,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 33 states have (on average 1.1818181818181819) internal successors, (39), 34 states have internal predecessors, (39), 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 01:00:34,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 39 transitions. [2023-11-12 01:00:34,837 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 39 transitions. Word has length 16 [2023-11-12 01:00:34,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 01:00:34,837 INFO L495 AbstractCegarLoop]: Abstraction has 35 states and 39 transitions. [2023-11-12 01:00:34,837 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.7222222222222223) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 01:00:34,838 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 39 transitions. [2023-11-12 01:00:34,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2023-11-12 01:00:34,839 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 01:00:34,839 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 01:00:34,843 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0c1b97f-bf7a-46f2-8360-cbca2430335b/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-12 01:00:35,039 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0c1b97f-bf7a-46f2-8360-cbca2430335b/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 01:00:35,040 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 1 more)] === [2023-11-12 01:00:35,040 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 01:00:35,040 INFO L85 PathProgramCache]: Analyzing trace with hash -15134203, now seen corresponding path program 3 times [2023-11-12 01:00:35,040 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 01:00:35,040 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [370462920] [2023-11-12 01:00:35,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 01:00:35,041 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 01:00:35,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 01:00:35,388 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 01:00:35,388 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 01:00:35,388 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [370462920] [2023-11-12 01:00:35,388 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [370462920] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 01:00:35,389 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [564859658] [2023-11-12 01:00:35,389 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-12 01:00:35,389 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 01:00:35,389 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0c1b97f-bf7a-46f2-8360-cbca2430335b/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 01:00:35,393 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0c1b97f-bf7a-46f2-8360-cbca2430335b/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 01:00:35,416 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0c1b97f-bf7a-46f2-8360-cbca2430335b/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-12 01:00:35,472 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-12 01:00:35,472 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-12 01:00:35,474 INFO L262 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 16 conjunts are in the unsatisfiable core [2023-11-12 01:00:35,476 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 01:00:35,532 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 01:00:35,532 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 01:00:35,869 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 01:00:35,869 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [564859658] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 01:00:35,870 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1183176515] [2023-11-12 01:00:35,872 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2023-11-12 01:00:35,872 INFO L166 IcfgInterpreter]: Building call graph [2023-11-12 01:00:35,872 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-12 01:00:35,873 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-12 01:00:35,873 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-12 01:00:36,196 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-12 01:00:36,731 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '865#(and (= |ULTIMATE.start_main_#t~mem7#1| |ULTIMATE.start_main_#t~post8#1|) (<= 1 |#StackHeapBarrier|) (<= 2147483649 |ULTIMATE.start_main_#t~post8#1|) (= |ULTIMATE.start_main_~q~0#1.base| |ULTIMATE.start_main_~p~0#1.base|) (= (select (select |#memory_int| |ULTIMATE.start_main_~q~0#1.base|) 0) |ULTIMATE.start_main_#t~mem7#1|) (= |ULTIMATE.start_main_~p~0#1.offset| 0) (= |ULTIMATE.start_main_~q~0#1.offset| 0))' at error location [2023-11-12 01:00:36,731 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-12 01:00:36,731 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-12 01:00:36,732 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 33 [2023-11-12 01:00:36,732 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [226146157] [2023-11-12 01:00:36,732 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-12 01:00:36,732 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2023-11-12 01:00:36,733 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 01:00:36,734 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2023-11-12 01:00:36,734 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=330, Invalid=1392, Unknown=0, NotChecked=0, Total=1722 [2023-11-12 01:00:36,735 INFO L87 Difference]: Start difference. First operand 35 states and 39 transitions. Second operand has 34 states, 34 states have (on average 1.6176470588235294) internal successors, (55), 33 states have internal predecessors, (55), 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 01:00:37,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 01:00:37,144 INFO L93 Difference]: Finished difference Result 71 states and 86 transitions. [2023-11-12 01:00:37,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2023-11-12 01:00:37,146 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 1.6176470588235294) internal successors, (55), 33 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2023-11-12 01:00:37,146 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 01:00:37,147 INFO L225 Difference]: With dead ends: 71 [2023-11-12 01:00:37,147 INFO L226 Difference]: Without dead ends: 59 [2023-11-12 01:00:37,149 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 57 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 952 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=683, Invalid=2397, Unknown=0, NotChecked=0, Total=3080 [2023-11-12 01:00:37,150 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 62 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 107 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 71 SdHoareTripleChecker+Invalid, 108 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 107 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-12 01:00:37,150 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [62 Valid, 71 Invalid, 108 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 107 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-12 01:00:37,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2023-11-12 01:00:37,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2023-11-12 01:00:37,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 57 states have (on average 1.105263157894737) internal successors, (63), 58 states have internal predecessors, (63), 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 01:00:37,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 63 transitions. [2023-11-12 01:00:37,173 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 63 transitions. Word has length 28 [2023-11-12 01:00:37,173 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 01:00:37,173 INFO L495 AbstractCegarLoop]: Abstraction has 59 states and 63 transitions. [2023-11-12 01:00:37,174 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 1.6176470588235294) internal successors, (55), 33 states have internal predecessors, (55), 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 01:00:37,174 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 63 transitions. [2023-11-12 01:00:37,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2023-11-12 01:00:37,177 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 01:00:37,177 INFO L195 NwaCegarLoop]: trace histogram [15, 15, 15, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 01:00:37,185 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0c1b97f-bf7a-46f2-8360-cbca2430335b/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-12 01:00:37,383 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0c1b97f-bf7a-46f2-8360-cbca2430335b/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 01:00:37,383 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 1 more)] === [2023-11-12 01:00:37,383 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 01:00:37,384 INFO L85 PathProgramCache]: Analyzing trace with hash 1487000325, now seen corresponding path program 4 times [2023-11-12 01:00:37,384 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 01:00:37,384 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [612811944] [2023-11-12 01:00:37,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 01:00:37,384 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 01:00:37,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 01:00:38,437 INFO L134 CoverageAnalysis]: Checked inductivity of 330 backedges. 0 proven. 330 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 01:00:38,438 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 01:00:38,438 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [612811944] [2023-11-12 01:00:38,438 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [612811944] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 01:00:38,438 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1996968233] [2023-11-12 01:00:38,438 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-12 01:00:38,438 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 01:00:38,438 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0c1b97f-bf7a-46f2-8360-cbca2430335b/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 01:00:38,440 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0c1b97f-bf7a-46f2-8360-cbca2430335b/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 01:00:38,443 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0c1b97f-bf7a-46f2-8360-cbca2430335b/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-12 01:00:38,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 01:00:38,553 INFO L262 TraceCheckSpWp]: Trace formula consists of 236 conjuncts, 32 conjunts are in the unsatisfiable core [2023-11-12 01:00:38,559 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 01:00:38,686 INFO L134 CoverageAnalysis]: Checked inductivity of 330 backedges. 0 proven. 330 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 01:00:38,686 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 01:00:39,843 INFO L134 CoverageAnalysis]: Checked inductivity of 330 backedges. 0 proven. 330 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 01:00:39,843 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1996968233] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 01:00:39,843 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [496638183] [2023-11-12 01:00:39,845 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2023-11-12 01:00:39,846 INFO L166 IcfgInterpreter]: Building call graph [2023-11-12 01:00:39,846 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-12 01:00:39,846 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-12 01:00:39,846 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-12 01:00:40,201 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-12 01:00:40,635 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1441#(and (= |ULTIMATE.start_main_#t~mem7#1| |ULTIMATE.start_main_#t~post8#1|) (<= 1 |#StackHeapBarrier|) (<= 2147483649 |ULTIMATE.start_main_#t~post8#1|) (= |ULTIMATE.start_main_~q~0#1.base| |ULTIMATE.start_main_~p~0#1.base|) (= (select (select |#memory_int| |ULTIMATE.start_main_~q~0#1.base|) 0) |ULTIMATE.start_main_#t~mem7#1|) (= |ULTIMATE.start_main_~p~0#1.offset| 0) (= |ULTIMATE.start_main_~q~0#1.offset| 0))' at error location [2023-11-12 01:00:40,635 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-12 01:00:40,635 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-12 01:00:40,635 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32, 32] total 65 [2023-11-12 01:00:40,635 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1040322643] [2023-11-12 01:00:40,635 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-12 01:00:40,636 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 66 states [2023-11-12 01:00:40,636 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 01:00:40,638 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2023-11-12 01:00:40,640 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1146, Invalid=4256, Unknown=0, NotChecked=0, Total=5402 [2023-11-12 01:00:40,641 INFO L87 Difference]: Start difference. First operand 59 states and 63 transitions. Second operand has 66 states, 66 states have (on average 1.5606060606060606) internal successors, (103), 65 states have internal predecessors, (103), 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 01:00:41,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 01:00:41,856 INFO L93 Difference]: Finished difference Result 119 states and 142 transitions. [2023-11-12 01:00:41,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2023-11-12 01:00:41,858 INFO L78 Accepts]: Start accepts. Automaton has has 66 states, 66 states have (on average 1.5606060606060606) internal successors, (103), 65 states have internal predecessors, (103), 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 52 [2023-11-12 01:00:41,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 01:00:41,859 INFO L225 Difference]: With dead ends: 119 [2023-11-12 01:00:41,859 INFO L226 Difference]: Without dead ends: 107 [2023-11-12 01:00:41,868 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 216 GetRequests, 113 SyntacticMatches, 1 SemanticMatches, 102 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2960 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=2619, Invalid=8093, Unknown=0, NotChecked=0, Total=10712 [2023-11-12 01:00:41,869 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 182 mSDsluCounter, 71 mSDsCounter, 0 mSdLazyCounter, 184 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 182 SdHoareTripleChecker+Valid, 78 SdHoareTripleChecker+Invalid, 185 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 184 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-12 01:00:41,869 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [182 Valid, 78 Invalid, 185 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 184 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-12 01:00:41,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2023-11-12 01:00:41,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 107. [2023-11-12 01:00:41,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 105 states have (on average 1.0571428571428572) internal successors, (111), 106 states have internal predecessors, (111), 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 01:00:41,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 111 transitions. [2023-11-12 01:00:41,896 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 111 transitions. Word has length 52 [2023-11-12 01:00:41,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 01:00:41,897 INFO L495 AbstractCegarLoop]: Abstraction has 107 states and 111 transitions. [2023-11-12 01:00:41,897 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 66 states, 66 states have (on average 1.5606060606060606) internal successors, (103), 65 states have internal predecessors, (103), 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 01:00:41,898 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 111 transitions. [2023-11-12 01:00:41,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2023-11-12 01:00:41,903 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 01:00:41,904 INFO L195 NwaCegarLoop]: trace histogram [31, 31, 31, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 01:00:41,911 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0c1b97f-bf7a-46f2-8360-cbca2430335b/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-12 01:00:42,109 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0c1b97f-bf7a-46f2-8360-cbca2430335b/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 01:00:42,110 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 1 more)] === [2023-11-12 01:00:42,110 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 01:00:42,110 INFO L85 PathProgramCache]: Analyzing trace with hash -354790139, now seen corresponding path program 5 times [2023-11-12 01:00:42,110 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 01:00:42,110 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [811112256] [2023-11-12 01:00:42,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 01:00:42,111 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 01:00:42,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 01:00:45,266 INFO L134 CoverageAnalysis]: Checked inductivity of 1426 backedges. 0 proven. 1426 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 01:00:45,267 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 01:00:45,267 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [811112256] [2023-11-12 01:00:45,267 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [811112256] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 01:00:45,267 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [391980284] [2023-11-12 01:00:45,267 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-12 01:00:45,268 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 01:00:45,268 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0c1b97f-bf7a-46f2-8360-cbca2430335b/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 01:00:45,273 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0c1b97f-bf7a-46f2-8360-cbca2430335b/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 01:00:45,280 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0c1b97f-bf7a-46f2-8360-cbca2430335b/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-12 01:01:13,189 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 32 check-sat command(s) [2023-11-12 01:01:13,190 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-12 01:01:13,206 INFO L262 TraceCheckSpWp]: Trace formula consists of 444 conjuncts, 64 conjunts are in the unsatisfiable core [2023-11-12 01:01:13,216 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 01:01:13,513 INFO L134 CoverageAnalysis]: Checked inductivity of 1426 backedges. 0 proven. 1426 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 01:01:13,513 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 01:01:17,969 INFO L134 CoverageAnalysis]: Checked inductivity of 1426 backedges. 0 proven. 1426 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 01:01:17,969 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [391980284] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 01:01:17,969 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [409257721] [2023-11-12 01:01:17,972 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2023-11-12 01:01:17,972 INFO L166 IcfgInterpreter]: Building call graph [2023-11-12 01:01:17,972 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-12 01:01:17,972 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-12 01:01:17,972 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-12 01:01:18,343 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-12 01:01:19,235 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2529#(and (= |ULTIMATE.start_main_#t~mem7#1| |ULTIMATE.start_main_#t~post8#1|) (<= 1 |#StackHeapBarrier|) (<= 2147483649 |ULTIMATE.start_main_#t~post8#1|) (= |ULTIMATE.start_main_~q~0#1.base| |ULTIMATE.start_main_~p~0#1.base|) (= (select (select |#memory_int| |ULTIMATE.start_main_~q~0#1.base|) 0) |ULTIMATE.start_main_#t~mem7#1|) (= |ULTIMATE.start_main_~p~0#1.offset| 0) (= |ULTIMATE.start_main_~q~0#1.offset| 0))' at error location [2023-11-12 01:01:19,235 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-12 01:01:19,235 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-12 01:01:19,235 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [64, 64, 64] total 129 [2023-11-12 01:01:19,235 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [747907762] [2023-11-12 01:01:19,236 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-12 01:01:19,237 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 130 states [2023-11-12 01:01:19,237 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 01:01:19,245 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 130 interpolants. [2023-11-12 01:01:19,255 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4314, Invalid=14592, Unknown=0, NotChecked=0, Total=18906 [2023-11-12 01:01:19,256 INFO L87 Difference]: Start difference. First operand 107 states and 111 transitions. Second operand has 130 states, 130 states have (on average 1.5307692307692307) internal successors, (199), 129 states have internal predecessors, (199), 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 01:01:22,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 01:01:22,894 INFO L93 Difference]: Finished difference Result 215 states and 254 transitions. [2023-11-12 01:01:22,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 127 states. [2023-11-12 01:01:22,895 INFO L78 Accepts]: Start accepts. Automaton has has 130 states, 130 states have (on average 1.5307692307692307) internal successors, (199), 129 states have internal predecessors, (199), 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 100 [2023-11-12 01:01:22,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 01:01:22,897 INFO L225 Difference]: With dead ends: 215 [2023-11-12 01:01:22,898 INFO L226 Difference]: Without dead ends: 203 [2023-11-12 01:01:22,907 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 424 GetRequests, 225 SyntacticMatches, 1 SemanticMatches, 198 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10048 ImplicationChecksByTransitivity, 9.5s TimeCoverageRelationStatistics Valid=10331, Invalid=29469, Unknown=0, NotChecked=0, Total=39800 [2023-11-12 01:01:22,908 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 454 mSDsluCounter, 71 mSDsCounter, 0 mSdLazyCounter, 350 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 454 SdHoareTripleChecker+Valid, 78 SdHoareTripleChecker+Invalid, 351 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 350 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-12 01:01:22,908 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [454 Valid, 78 Invalid, 351 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 350 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-12 01:01:22,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2023-11-12 01:01:22,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 203. [2023-11-12 01:01:22,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 203 states, 201 states have (on average 1.0298507462686568) internal successors, (207), 202 states have internal predecessors, (207), 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 01:01:22,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 203 states to 203 states and 207 transitions. [2023-11-12 01:01:22,945 INFO L78 Accepts]: Start accepts. Automaton has 203 states and 207 transitions. Word has length 100 [2023-11-12 01:01:22,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 01:01:22,946 INFO L495 AbstractCegarLoop]: Abstraction has 203 states and 207 transitions. [2023-11-12 01:01:22,946 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 130 states, 130 states have (on average 1.5307692307692307) internal successors, (199), 129 states have internal predecessors, (199), 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 01:01:22,946 INFO L276 IsEmpty]: Start isEmpty. Operand 203 states and 207 transitions. [2023-11-12 01:01:22,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 197 [2023-11-12 01:01:22,950 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 01:01:22,950 INFO L195 NwaCegarLoop]: trace histogram [63, 63, 63, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 01:01:22,965 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0c1b97f-bf7a-46f2-8360-cbca2430335b/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-11-12 01:01:23,160 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0c1b97f-bf7a-46f2-8360-cbca2430335b/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 01:01:23,161 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 1 more)] === [2023-11-12 01:01:23,161 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 01:01:23,161 INFO L85 PathProgramCache]: Analyzing trace with hash 132602117, now seen corresponding path program 6 times [2023-11-12 01:01:23,161 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 01:01:23,162 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [611966866] [2023-11-12 01:01:23,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 01:01:23,162 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 01:01:23,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat