./Ultimate.py --spec ../../sv-benchmarks/c/properties/no-overflow.prp --file ../../sv-benchmarks/c/termination-recursive-malloc/rec_malloc_ex2.i --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_695c2f77-a0fc-4901-a28e-b99e9934b810/bin/utaipan-verify-NcY6lQBIFX/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_695c2f77-a0fc-4901-a28e-b99e9934b810/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_695c2f77-a0fc-4901-a28e-b99e9934b810/bin/utaipan-verify-NcY6lQBIFX/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_695c2f77-a0fc-4901-a28e-b99e9934b810/bin/utaipan-verify-NcY6lQBIFX/config/TaipanReach.xml -i ../../sv-benchmarks/c/termination-recursive-malloc/rec_malloc_ex2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_695c2f77-a0fc-4901-a28e-b99e9934b810/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_695c2f77-a0fc-4901-a28e-b99e9934b810/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 b91dcc12f43fdd03af0529f07bf7885945925554291ddde3b9ca40d8f32b93c1 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-cf1a783 [2023-11-12 00:51:40,719 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-12 00:51:40,831 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_695c2f77-a0fc-4901-a28e-b99e9934b810/bin/utaipan-verify-NcY6lQBIFX/config/svcomp-Overflow-64bit-Taipan_Default.epf [2023-11-12 00:51:40,844 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-12 00:51:40,847 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-12 00:51:40,897 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-12 00:51:40,898 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-12 00:51:40,899 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-12 00:51:40,900 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-12 00:51:40,905 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-12 00:51:40,906 INFO L153 SettingsManager]: * User list type=DISABLED [2023-11-12 00:51:40,906 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-11-12 00:51:40,907 INFO L153 SettingsManager]: * Explicit value domain=true [2023-11-12 00:51:40,908 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-11-12 00:51:40,909 INFO L153 SettingsManager]: * Octagon Domain=false [2023-11-12 00:51:40,909 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-11-12 00:51:40,910 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-11-12 00:51:40,910 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-11-12 00:51:40,911 INFO L153 SettingsManager]: * Interval Domain=false [2023-11-12 00:51:40,911 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-11-12 00:51:40,912 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-11-12 00:51:40,912 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-11-12 00:51:40,914 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-12 00:51:40,914 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-12 00:51:40,915 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-12 00:51:40,916 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-12 00:51:40,917 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-12 00:51:40,917 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-12 00:51:40,918 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-12 00:51:40,918 INFO L153 SettingsManager]: * Check absence of signed integer overflows=true [2023-11-12 00:51:40,919 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-12 00:51:40,920 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-12 00:51:40,920 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-12 00:51:40,920 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-12 00:51:40,921 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-12 00:51:40,922 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-12 00:51:40,922 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-12 00:51:40,922 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-12 00:51:40,923 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-12 00:51:40,923 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-11-12 00:51:40,923 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-12 00:51:40,923 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-12 00:51:40,924 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-11-12 00:51:40,924 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-12 00:51:40,924 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_695c2f77-a0fc-4901-a28e-b99e9934b810/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_695c2f77-a0fc-4901-a28e-b99e9934b810/bin/utaipan-verify-NcY6lQBIFX Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! overflow) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> b91dcc12f43fdd03af0529f07bf7885945925554291ddde3b9ca40d8f32b93c1 [2023-11-12 00:51:41,208 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-12 00:51:41,232 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-12 00:51:41,237 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-12 00:51:41,238 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-12 00:51:41,239 INFO L274 PluginConnector]: CDTParser initialized [2023-11-12 00:51:41,241 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_695c2f77-a0fc-4901-a28e-b99e9934b810/bin/utaipan-verify-NcY6lQBIFX/../../sv-benchmarks/c/termination-recursive-malloc/rec_malloc_ex2.i [2023-11-12 00:51:44,330 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-12 00:51:44,521 INFO L384 CDTParser]: Found 1 translation units. [2023-11-12 00:51:44,522 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_695c2f77-a0fc-4901-a28e-b99e9934b810/sv-benchmarks/c/termination-recursive-malloc/rec_malloc_ex2.i [2023-11-12 00:51:44,529 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_695c2f77-a0fc-4901-a28e-b99e9934b810/bin/utaipan-verify-NcY6lQBIFX/data/544b558bd/90356278aa014f13a54ffd0c409e0865/FLAGed4b9eb71 [2023-11-12 00:51:44,545 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_695c2f77-a0fc-4901-a28e-b99e9934b810/bin/utaipan-verify-NcY6lQBIFX/data/544b558bd/90356278aa014f13a54ffd0c409e0865 [2023-11-12 00:51:44,548 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-12 00:51:44,550 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-12 00:51:44,552 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-12 00:51:44,552 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-12 00:51:44,566 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-12 00:51:44,567 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 12:51:44" (1/1) ... [2023-11-12 00:51:44,570 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@24d1c9f4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:51:44, skipping insertion in model container [2023-11-12 00:51:44,571 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 12:51:44" (1/1) ... [2023-11-12 00:51:44,595 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-12 00:51:44,787 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-12 00:51:44,801 INFO L202 MainTranslator]: Completed pre-run [2023-11-12 00:51:44,818 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-12 00:51:44,834 INFO L206 MainTranslator]: Completed translation [2023-11-12 00:51:44,834 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:51:44 WrapperNode [2023-11-12 00:51:44,835 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-12 00:51:44,836 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-12 00:51:44,836 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-12 00:51:44,837 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-12 00:51:44,844 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:51:44" (1/1) ... [2023-11-12 00:51:44,851 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:51:44" (1/1) ... [2023-11-12 00:51:44,870 INFO L138 Inliner]: procedures = 11, calls = 19, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 33 [2023-11-12 00:51:44,870 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-12 00:51:44,871 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-12 00:51:44,871 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-12 00:51:44,872 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-12 00:51:44,881 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:51:44" (1/1) ... [2023-11-12 00:51:44,882 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:51:44" (1/1) ... [2023-11-12 00:51:44,894 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:51:44" (1/1) ... [2023-11-12 00:51:44,895 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:51:44" (1/1) ... [2023-11-12 00:51:44,901 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:51:44" (1/1) ... [2023-11-12 00:51:44,906 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:51:44" (1/1) ... [2023-11-12 00:51:44,915 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:51:44" (1/1) ... [2023-11-12 00:51:44,918 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:51:44" (1/1) ... [2023-11-12 00:51:44,920 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-12 00:51:44,921 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-12 00:51:44,922 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-12 00:51:44,922 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-12 00:51:44,923 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:51:44" (1/1) ... [2023-11-12 00:51:44,931 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-12 00:51:44,943 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_695c2f77-a0fc-4901-a28e-b99e9934b810/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 00:51:44,962 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_695c2f77-a0fc-4901-a28e-b99e9934b810/bin/utaipan-verify-NcY6lQBIFX/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-12 00:51:44,983 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_695c2f77-a0fc-4901-a28e-b99e9934b810/bin/utaipan-verify-NcY6lQBIFX/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-12 00:51:45,004 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-12 00:51:45,004 INFO L130 BoogieDeclarations]: Found specification of procedure rec [2023-11-12 00:51:45,005 INFO L138 BoogieDeclarations]: Found implementation of procedure rec [2023-11-12 00:51:45,005 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-12 00:51:45,005 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-12 00:51:45,005 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-12 00:51:45,005 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-12 00:51:45,005 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-12 00:51:45,084 INFO L236 CfgBuilder]: Building ICFG [2023-11-12 00:51:45,086 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-12 00:51:45,266 INFO L277 CfgBuilder]: Performing block encoding [2023-11-12 00:51:45,282 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-12 00:51:45,282 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-11-12 00:51:45,286 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 12:51:45 BoogieIcfgContainer [2023-11-12 00:51:45,286 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-12 00:51:45,290 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-12 00:51:45,290 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-12 00:51:45,293 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-12 00:51:45,295 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.11 12:51:44" (1/3) ... [2023-11-12 00:51:45,296 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@67c980cb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 12:51:45, skipping insertion in model container [2023-11-12 00:51:45,297 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:51:44" (2/3) ... [2023-11-12 00:51:45,297 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@67c980cb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 12:51:45, skipping insertion in model container [2023-11-12 00:51:45,298 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 12:51:45" (3/3) ... [2023-11-12 00:51:45,300 INFO L112 eAbstractionObserver]: Analyzing ICFG rec_malloc_ex2.i [2023-11-12 00:51:45,320 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-12 00:51:45,320 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 4 error locations. [2023-11-12 00:51:45,361 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-12 00:51:45,367 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;@64bab519, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-12 00:51:45,368 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2023-11-12 00:51:45,371 INFO L276 IsEmpty]: Start isEmpty. Operand has 21 states, 13 states have (on average 1.5384615384615385) internal successors, (20), 17 states have internal predecessors, (20), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-12 00:51:45,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2023-11-12 00:51:45,377 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:51:45,378 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-11-12 00:51:45,379 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting recErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [recErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, recErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 1 more)] === [2023-11-12 00:51:45,384 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:51:45,397 INFO L85 PathProgramCache]: Analyzing trace with hash -844497529, now seen corresponding path program 1 times [2023-11-12 00:51:45,409 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:51:45,410 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1798611170] [2023-11-12 00:51:45,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:51:45,411 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:51:45,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:51:46,002 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 00:51:46,002 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:51:46,003 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1798611170] [2023-11-12 00:51:46,004 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1798611170] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 00:51:46,004 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 00:51:46,004 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-12 00:51:46,006 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [388987783] [2023-11-12 00:51:46,007 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 00:51:46,012 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-12 00:51:46,012 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:51:46,054 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-12 00:51:46,055 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-11-12 00:51:46,057 INFO L87 Difference]: Start difference. First operand has 21 states, 13 states have (on average 1.5384615384615385) internal successors, (20), 17 states have internal predecessors, (20), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 7 states, 5 states have (on average 1.2) internal successors, (6), 6 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 00:51:46,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:51:46,281 INFO L93 Difference]: Finished difference Result 36 states and 39 transitions. [2023-11-12 00:51:46,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-12 00:51:46,283 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 5 states have (on average 1.2) internal successors, (6), 6 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2023-11-12 00:51:46,284 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:51:46,291 INFO L225 Difference]: With dead ends: 36 [2023-11-12 00:51:46,291 INFO L226 Difference]: Without dead ends: 31 [2023-11-12 00:51:46,294 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2023-11-12 00:51:46,302 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 17 mSDsluCounter, 49 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 76 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-12 00:51:46,303 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 60 Invalid, 76 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 74 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-12 00:51:46,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2023-11-12 00:51:46,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 24. [2023-11-12 00:51:46,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 16 states have (on average 1.375) internal successors, (22), 19 states have internal predecessors, (22), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-11-12 00:51:46,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 27 transitions. [2023-11-12 00:51:46,339 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 27 transitions. Word has length 7 [2023-11-12 00:51:46,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:51:46,339 INFO L495 AbstractCegarLoop]: Abstraction has 24 states and 27 transitions. [2023-11-12 00:51:46,339 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 5 states have (on average 1.2) internal successors, (6), 6 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 00:51:46,340 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 27 transitions. [2023-11-12 00:51:46,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2023-11-12 00:51:46,340 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:51:46,341 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 00:51:46,341 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-12 00:51:46,341 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting recErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [recErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, recErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 1 more)] === [2023-11-12 00:51:46,342 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:51:46,342 INFO L85 PathProgramCache]: Analyzing trace with hash -409619585, now seen corresponding path program 1 times [2023-11-12 00:51:46,342 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:51:46,343 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [795674597] [2023-11-12 00:51:46,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:51:46,343 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:51:46,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:51:46,641 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 00:51:46,641 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:51:46,641 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [795674597] [2023-11-12 00:51:46,642 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [795674597] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 00:51:46,642 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 00:51:46,642 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-12 00:51:46,643 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1537247301] [2023-11-12 00:51:46,643 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 00:51:46,644 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-12 00:51:46,645 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:51:46,645 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-12 00:51:46,646 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2023-11-12 00:51:46,646 INFO L87 Difference]: Start difference. First operand 24 states and 27 transitions. Second operand has 8 states, 6 states have (on average 1.1666666666666667) internal successors, (7), 6 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 00:51:46,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:51:46,789 INFO L93 Difference]: Finished difference Result 34 states and 38 transitions. [2023-11-12 00:51:46,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-12 00:51:46,790 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 6 states have (on average 1.1666666666666667) internal successors, (7), 6 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2023-11-12 00:51:46,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:51:46,794 INFO L225 Difference]: With dead ends: 34 [2023-11-12 00:51:46,794 INFO L226 Difference]: Without dead ends: 33 [2023-11-12 00:51:46,800 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2023-11-12 00:51:46,803 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 18 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 62 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 70 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 62 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-12 00:51:46,804 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 39 Invalid, 70 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 62 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-12 00:51:46,807 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2023-11-12 00:51:46,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 25. [2023-11-12 00:51:46,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 17 states have (on average 1.2941176470588236) internal successors, (22), 20 states have internal predecessors, (22), 2 states have call successors, (2), 2 states have call predecessors, (2), 3 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-11-12 00:51:46,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 28 transitions. [2023-11-12 00:51:46,821 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 28 transitions. Word has length 8 [2023-11-12 00:51:46,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:51:46,821 INFO L495 AbstractCegarLoop]: Abstraction has 25 states and 28 transitions. [2023-11-12 00:51:46,822 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 6 states have (on average 1.1666666666666667) internal successors, (7), 6 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 00:51:46,822 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 28 transitions. [2023-11-12 00:51:46,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2023-11-12 00:51:46,823 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:51:46,824 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 00:51:46,824 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-12 00:51:46,825 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [recErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, recErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 1 more)] === [2023-11-12 00:51:46,828 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:51:46,828 INFO L85 PathProgramCache]: Analyzing trace with hash 1491827066, now seen corresponding path program 1 times [2023-11-12 00:51:46,828 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:51:46,828 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [814589482] [2023-11-12 00:51:46,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:51:46,830 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:51:46,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:51:47,082 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 00:51:47,082 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:51:47,083 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [814589482] [2023-11-12 00:51:47,083 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [814589482] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 00:51:47,083 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 00:51:47,083 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-11-12 00:51:47,084 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [930005291] [2023-11-12 00:51:47,084 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 00:51:47,085 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-12 00:51:47,085 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:51:47,087 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-12 00:51:47,087 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2023-11-12 00:51:47,088 INFO L87 Difference]: Start difference. First operand 25 states and 28 transitions. Second operand has 7 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 6 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-12 00:51:47,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:51:47,153 INFO L93 Difference]: Finished difference Result 49 states and 55 transitions. [2023-11-12 00:51:47,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-12 00:51:47,154 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 6 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 10 [2023-11-12 00:51:47,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:51:47,154 INFO L225 Difference]: With dead ends: 49 [2023-11-12 00:51:47,154 INFO L226 Difference]: Without dead ends: 23 [2023-11-12 00:51:47,155 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2023-11-12 00:51:47,156 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 5 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 59 SdHoareTripleChecker+Invalid, 51 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-12 00:51:47,157 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 59 Invalid, 51 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-12 00:51:47,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2023-11-12 00:51:47,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2023-11-12 00:51:47,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 16 states have (on average 1.25) internal successors, (20), 18 states have internal predecessors, (20), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-11-12 00:51:47,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 25 transitions. [2023-11-12 00:51:47,167 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 25 transitions. Word has length 10 [2023-11-12 00:51:47,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:51:47,168 INFO L495 AbstractCegarLoop]: Abstraction has 23 states and 25 transitions. [2023-11-12 00:51:47,168 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 6 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-12 00:51:47,169 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 25 transitions. [2023-11-12 00:51:47,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2023-11-12 00:51:47,169 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:51:47,170 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 00:51:47,170 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-12 00:51:47,170 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting recErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [recErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, recErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 1 more)] === [2023-11-12 00:51:47,171 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:51:47,171 INFO L85 PathProgramCache]: Analyzing trace with hash -157265571, now seen corresponding path program 1 times [2023-11-12 00:51:47,171 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:51:47,172 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1977128629] [2023-11-12 00:51:47,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:51:47,172 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:51:47,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:51:47,257 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 00:51:47,257 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:51:47,258 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1977128629] [2023-11-12 00:51:47,258 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1977128629] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 00:51:47,259 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 00:51:47,259 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-12 00:51:47,259 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [651287202] [2023-11-12 00:51:47,259 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 00:51:47,260 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-12 00:51:47,260 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:51:47,261 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-12 00:51:47,262 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-12 00:51:47,262 INFO L87 Difference]: Start difference. First operand 23 states and 25 transitions. Second operand has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 4 states have internal predecessors, (10), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 00:51:47,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:51:47,287 INFO L93 Difference]: Finished difference Result 23 states and 25 transitions. [2023-11-12 00:51:47,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-12 00:51:47,288 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 4 states have internal predecessors, (10), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2023-11-12 00:51:47,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:51:47,290 INFO L225 Difference]: With dead ends: 23 [2023-11-12 00:51:47,290 INFO L226 Difference]: Without dead ends: 22 [2023-11-12 00:51:47,291 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-12 00:51:47,303 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 1 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-12 00:51:47,303 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 38 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-12 00:51:47,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2023-11-12 00:51:47,309 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 21. [2023-11-12 00:51:47,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 15 states have (on average 1.2) internal successors, (18), 16 states have internal predecessors, (18), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-11-12 00:51:47,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 23 transitions. [2023-11-12 00:51:47,312 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 23 transitions. Word has length 12 [2023-11-12 00:51:47,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:51:47,313 INFO L495 AbstractCegarLoop]: Abstraction has 21 states and 23 transitions. [2023-11-12 00:51:47,313 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 4 states have internal predecessors, (10), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 00:51:47,313 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 23 transitions. [2023-11-12 00:51:47,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2023-11-12 00:51:47,315 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:51:47,316 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 00:51:47,316 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-12 00:51:47,316 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [recErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, recErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 1 more)] === [2023-11-12 00:51:47,318 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:51:47,319 INFO L85 PathProgramCache]: Analyzing trace with hash -1539498490, now seen corresponding path program 1 times [2023-11-12 00:51:47,319 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:51:47,319 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2114561704] [2023-11-12 00:51:47,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:51:47,319 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:51:47,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:51:47,782 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-12 00:51:47,783 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:51:47,783 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2114561704] [2023-11-12 00:51:47,784 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2114561704] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 00:51:47,784 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [761163940] [2023-11-12 00:51:47,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:51:47,786 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:51:47,786 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_695c2f77-a0fc-4901-a28e-b99e9934b810/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 00:51:47,792 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_695c2f77-a0fc-4901-a28e-b99e9934b810/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 00:51:47,801 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_695c2f77-a0fc-4901-a28e-b99e9934b810/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-12 00:51:47,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:51:47,887 INFO L262 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 15 conjunts are in the unsatisfiable core [2023-11-12 00:51:47,893 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 00:51:47,943 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-12 00:51:47,946 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-11-12 00:51:48,014 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-12 00:51:48,017 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2023-11-12 00:51:48,086 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-12 00:51:48,086 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-12 00:51:48,086 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [761163940] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 00:51:48,086 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-12 00:51:48,087 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [11] total 16 [2023-11-12 00:51:48,087 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [580607080] [2023-11-12 00:51:48,087 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 00:51:48,088 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-12 00:51:48,088 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:51:48,088 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-12 00:51:48,089 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=200, Unknown=0, NotChecked=0, Total=240 [2023-11-12 00:51:48,089 INFO L87 Difference]: Start difference. First operand 21 states and 23 transitions. Second operand has 7 states, 5 states have (on average 2.6) internal successors, (13), 7 states have internal predecessors, (13), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-12 00:51:48,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:51:48,154 INFO L93 Difference]: Finished difference Result 29 states and 32 transitions. [2023-11-12 00:51:48,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-12 00:51:48,154 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 5 states have (on average 2.6) internal successors, (13), 7 states have internal predecessors, (13), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 18 [2023-11-12 00:51:48,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:51:48,155 INFO L225 Difference]: With dead ends: 29 [2023-11-12 00:51:48,156 INFO L226 Difference]: Without dead ends: 28 [2023-11-12 00:51:48,156 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2023-11-12 00:51:48,157 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 2 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 69 SdHoareTripleChecker+Invalid, 55 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-12 00:51:48,157 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 69 Invalid, 55 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-12 00:51:48,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2023-11-12 00:51:48,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 26. [2023-11-12 00:51:48,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 19 states have (on average 1.1578947368421053) internal successors, (22), 20 states have internal predecessors, (22), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2023-11-12 00:51:48,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 29 transitions. [2023-11-12 00:51:48,165 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 29 transitions. Word has length 18 [2023-11-12 00:51:48,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:51:48,165 INFO L495 AbstractCegarLoop]: Abstraction has 26 states and 29 transitions. [2023-11-12 00:51:48,166 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 5 states have (on average 2.6) internal successors, (13), 7 states have internal predecessors, (13), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-12 00:51:48,166 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 29 transitions. [2023-11-12 00:51:48,167 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2023-11-12 00:51:48,167 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:51:48,167 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 00:51:48,173 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_695c2f77-a0fc-4901-a28e-b99e9934b810/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-11-12 00:51:48,373 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_695c2f77-a0fc-4901-a28e-b99e9934b810/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:51:48,373 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [recErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, recErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 1 more)] === [2023-11-12 00:51:48,375 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:51:48,375 INFO L85 PathProgramCache]: Analyzing trace with hash -479812874, now seen corresponding path program 1 times [2023-11-12 00:51:48,375 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:51:48,375 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [916803809] [2023-11-12 00:51:48,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:51:48,376 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:51:48,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:51:48,712 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-12 00:51:48,712 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:51:48,712 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [916803809] [2023-11-12 00:51:48,713 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [916803809] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 00:51:48,713 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [131834917] [2023-11-12 00:51:48,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:51:48,713 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:51:48,714 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_695c2f77-a0fc-4901-a28e-b99e9934b810/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 00:51:48,715 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_695c2f77-a0fc-4901-a28e-b99e9934b810/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 00:51:48,736 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_695c2f77-a0fc-4901-a28e-b99e9934b810/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-12 00:51:48,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:51:48,799 INFO L262 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2023-11-12 00:51:48,802 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 00:51:48,813 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-12 00:51:48,818 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-11-12 00:51:48,894 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-12 00:51:48,896 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2023-11-12 00:51:48,939 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2023-11-12 00:51:49,049 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-12 00:51:49,050 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-12 00:51:49,050 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [131834917] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 00:51:49,050 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-12 00:51:49,050 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [11] total 17 [2023-11-12 00:51:49,051 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1511735890] [2023-11-12 00:51:49,051 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 00:51:49,052 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-12 00:51:49,053 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:51:49,053 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-12 00:51:49,054 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=230, Unknown=0, NotChecked=0, Total=272 [2023-11-12 00:51:49,054 INFO L87 Difference]: Start difference. First operand 26 states and 29 transitions. Second operand has 8 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 7 states have internal predecessors, (14), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-12 00:51:49,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:51:49,140 INFO L93 Difference]: Finished difference Result 28 states and 31 transitions. [2023-11-12 00:51:49,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-12 00:51:49,141 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 7 states have internal predecessors, (14), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 19 [2023-11-12 00:51:49,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:51:49,142 INFO L225 Difference]: With dead ends: 28 [2023-11-12 00:51:49,143 INFO L226 Difference]: Without dead ends: 27 [2023-11-12 00:51:49,143 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2023-11-12 00:51:49,144 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 0 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 50 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 00:51:49,145 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 50 Invalid, 60 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 59 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-12 00:51:49,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2023-11-12 00:51:49,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2023-11-12 00:51:49,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 20 states have (on average 1.15) internal successors, (23), 21 states have internal predecessors, (23), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2023-11-12 00:51:49,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 30 transitions. [2023-11-12 00:51:49,158 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 30 transitions. Word has length 19 [2023-11-12 00:51:49,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:51:49,159 INFO L495 AbstractCegarLoop]: Abstraction has 27 states and 30 transitions. [2023-11-12 00:51:49,159 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 7 states have internal predecessors, (14), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-12 00:51:49,159 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 30 transitions. [2023-11-12 00:51:49,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2023-11-12 00:51:49,161 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:51:49,161 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1] [2023-11-12 00:51:49,172 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_695c2f77-a0fc-4901-a28e-b99e9934b810/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-12 00:51:49,367 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_695c2f77-a0fc-4901-a28e-b99e9934b810/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2023-11-12 00:51:49,367 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [recErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, recErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 1 more)] === [2023-11-12 00:51:49,368 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:51:49,368 INFO L85 PathProgramCache]: Analyzing trace with hash -1359335082, now seen corresponding path program 1 times [2023-11-12 00:51:49,368 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:51:49,368 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1500101010] [2023-11-12 00:51:49,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:51:49,369 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:51:49,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:51:49,895 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 4 proven. 22 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-11-12 00:51:49,895 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:51:49,895 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1500101010] [2023-11-12 00:51:49,895 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1500101010] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 00:51:49,895 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1986145274] [2023-11-12 00:51:49,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:51:49,896 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:51:49,896 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_695c2f77-a0fc-4901-a28e-b99e9934b810/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 00:51:49,897 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_695c2f77-a0fc-4901-a28e-b99e9934b810/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 00:51:49,927 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_695c2f77-a0fc-4901-a28e-b99e9934b810/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-12 00:51:50,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:51:50,022 INFO L262 TraceCheckSpWp]: Trace formula consists of 258 conjuncts, 33 conjunts are in the unsatisfiable core [2023-11-12 00:51:50,027 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 00:51:50,082 INFO L322 Elim1Store]: treesize reduction 21, result has 41.7 percent of original size [2023-11-12 00:51:50,087 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 26 [2023-11-12 00:51:50,324 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 24 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-12 00:51:50,324 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 00:51:50,816 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 24 proven. 4 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-12 00:51:50,817 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1986145274] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 00:51:50,817 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1792155439] [2023-11-12 00:51:50,835 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2023-11-12 00:51:50,836 INFO L166 IcfgInterpreter]: Building call graph [2023-11-12 00:51:50,840 FATAL L? ?]: Ignoring exception! java.lang.IllegalArgumentException: Recursive programs are not supported. at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.topsortRelevant(CallGraph.java:132) at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.(CallGraph.java:97) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.(IcfgInterpreter.java:92) at de.uni_freiburg.informatik.ultimate.plugins.sifa.SifaBuilder.construct(SifaBuilder.java:96) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:98) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:68) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:267) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:148) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:137) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:337) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:431) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:366) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:416) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:303) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:263) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:176) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:155) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:167) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:150) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:127) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:233) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:227) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:144) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:106) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:319) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2023-11-12 00:51:50,842 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-12 00:51:50,842 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 12] total 26 [2023-11-12 00:51:50,842 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1203107526] [2023-11-12 00:51:50,842 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-12 00:51:50,843 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-11-12 00:51:50,843 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:51:50,844 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-11-12 00:51:50,845 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=523, Unknown=0, NotChecked=0, Total=650 [2023-11-12 00:51:50,845 INFO L87 Difference]: Start difference. First operand 27 states and 30 transitions. Second operand has 26 states, 20 states have (on average 2.4) internal successors, (48), 23 states have internal predecessors, (48), 8 states have call successors, (9), 4 states have call predecessors, (9), 5 states have return successors, (9), 4 states have call predecessors, (9), 8 states have call successors, (9) [2023-11-12 00:51:51,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:51:51,039 INFO L93 Difference]: Finished difference Result 53 states and 60 transitions. [2023-11-12 00:51:51,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-12 00:51:51,040 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 20 states have (on average 2.4) internal successors, (48), 23 states have internal predecessors, (48), 8 states have call successors, (9), 4 states have call predecessors, (9), 5 states have return successors, (9), 4 states have call predecessors, (9), 8 states have call successors, (9) Word has length 36 [2023-11-12 00:51:51,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:51:51,041 INFO L225 Difference]: With dead ends: 53 [2023-11-12 00:51:51,041 INFO L226 Difference]: Without dead ends: 30 [2023-11-12 00:51:51,042 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 57 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 272 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=160, Invalid=652, Unknown=0, NotChecked=0, Total=812 [2023-11-12 00:51:51,043 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 6 mSDsluCounter, 101 mSDsCounter, 0 mSdLazyCounter, 149 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 112 SdHoareTripleChecker+Invalid, 151 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 149 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-12 00:51:51,043 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 112 Invalid, 151 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 149 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-12 00:51:51,044 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2023-11-12 00:51:51,048 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2023-11-12 00:51:51,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 22 states have (on average 1.1363636363636365) internal successors, (25), 23 states have internal predecessors, (25), 3 states have call successors, (3), 2 states have call predecessors, (3), 3 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) [2023-11-12 00:51:51,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 33 transitions. [2023-11-12 00:51:51,049 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 33 transitions. Word has length 36 [2023-11-12 00:51:51,050 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:51:51,050 INFO L495 AbstractCegarLoop]: Abstraction has 30 states and 33 transitions. [2023-11-12 00:51:51,050 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 20 states have (on average 2.4) internal successors, (48), 23 states have internal predecessors, (48), 8 states have call successors, (9), 4 states have call predecessors, (9), 5 states have return successors, (9), 4 states have call predecessors, (9), 8 states have call successors, (9) [2023-11-12 00:51:51,050 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 33 transitions. [2023-11-12 00:51:51,052 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2023-11-12 00:51:51,052 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:51:51,052 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 4, 4, 4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1] [2023-11-12 00:51:51,062 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_695c2f77-a0fc-4901-a28e-b99e9934b810/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-11-12 00:51:51,257 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_695c2f77-a0fc-4901-a28e-b99e9934b810/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:51:51,258 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [recErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, recErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 1 more)] === [2023-11-12 00:51:51,258 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:51:51,258 INFO L85 PathProgramCache]: Analyzing trace with hash 1793076286, now seen corresponding path program 2 times [2023-11-12 00:51:51,258 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:51:51,258 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1285003437] [2023-11-12 00:51:51,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:51:51,259 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:51:51,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:51:52,125 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 5 proven. 61 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2023-11-12 00:51:52,126 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:51:52,127 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1285003437] [2023-11-12 00:51:52,127 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1285003437] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 00:51:52,127 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [586530033] [2023-11-12 00:51:52,128 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-12 00:51:52,128 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:51:52,128 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_695c2f77-a0fc-4901-a28e-b99e9934b810/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 00:51:52,129 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_695c2f77-a0fc-4901-a28e-b99e9934b810/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 00:51:52,137 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_695c2f77-a0fc-4901-a28e-b99e9934b810/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-12 00:51:52,236 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2023-11-12 00:51:52,237 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-12 00:51:52,238 INFO L262 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 14 conjunts are in the unsatisfiable core [2023-11-12 00:51:52,241 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 00:51:52,289 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2023-11-12 00:51:52,324 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 85 trivial. 0 not checked. [2023-11-12 00:51:52,325 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 00:51:52,445 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2023-11-12 00:51:52,465 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 85 trivial. 0 not checked. [2023-11-12 00:51:52,465 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [586530033] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-12 00:51:52,465 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-11-12 00:51:52,466 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [13, 5] total 20 [2023-11-12 00:51:52,466 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [243785541] [2023-11-12 00:51:52,466 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 00:51:52,467 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-12 00:51:52,467 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:51:52,467 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-12 00:51:52,469 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=319, Unknown=0, NotChecked=0, Total=380 [2023-11-12 00:51:52,469 INFO L87 Difference]: Start difference. First operand 30 states and 33 transitions. Second operand has 5 states, 4 states have (on average 4.25) internal successors, (17), 5 states have internal predecessors, (17), 2 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-11-12 00:51:52,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:51:52,549 INFO L93 Difference]: Finished difference Result 30 states and 33 transitions. [2023-11-12 00:51:52,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-12 00:51:52,550 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 4.25) internal successors, (17), 5 states have internal predecessors, (17), 2 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 52 [2023-11-12 00:51:52,550 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:51:52,551 INFO L225 Difference]: With dead ends: 30 [2023-11-12 00:51:52,551 INFO L226 Difference]: Without dead ends: 29 [2023-11-12 00:51:52,552 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=70, Invalid=392, Unknown=0, NotChecked=0, Total=462 [2023-11-12 00:51:52,553 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 5 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-12 00:51:52,554 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 41 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-12 00:51:52,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2023-11-12 00:51:52,560 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2023-11-12 00:51:52,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 22 states have (on average 1.0909090909090908) internal successors, (24), 22 states have internal predecessors, (24), 3 states have call successors, (3), 2 states have call predecessors, (3), 3 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) [2023-11-12 00:51:52,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 32 transitions. [2023-11-12 00:51:52,561 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 32 transitions. Word has length 52 [2023-11-12 00:51:52,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:51:52,563 INFO L495 AbstractCegarLoop]: Abstraction has 29 states and 32 transitions. [2023-11-12 00:51:52,563 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 4.25) internal successors, (17), 5 states have internal predecessors, (17), 2 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-11-12 00:51:52,563 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 32 transitions. [2023-11-12 00:51:52,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2023-11-12 00:51:52,565 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:51:52,565 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 4, 4, 4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1] [2023-11-12 00:51:52,577 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_695c2f77-a0fc-4901-a28e-b99e9934b810/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-12 00:51:52,770 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_695c2f77-a0fc-4901-a28e-b99e9934b810/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2023-11-12 00:51:52,770 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [recErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, recErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 1 more)] === [2023-11-12 00:51:52,771 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:51:52,771 INFO L85 PathProgramCache]: Analyzing trace with hash -249209922, now seen corresponding path program 1 times [2023-11-12 00:51:52,771 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:51:52,771 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1443431112] [2023-11-12 00:51:52,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:51:52,771 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:51:52,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:51:53,619 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 5 proven. 61 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-11-12 00:51:53,620 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:51:53,620 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1443431112] [2023-11-12 00:51:53,620 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1443431112] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 00:51:53,620 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1747777695] [2023-11-12 00:51:53,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:51:53,621 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:51:53,621 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_695c2f77-a0fc-4901-a28e-b99e9934b810/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 00:51:53,622 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_695c2f77-a0fc-4901-a28e-b99e9934b810/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 00:51:53,644 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_695c2f77-a0fc-4901-a28e-b99e9934b810/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-12 00:51:53,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:51:53,770 INFO L262 TraceCheckSpWp]: Trace formula consists of 367 conjuncts, 47 conjunts are in the unsatisfiable core [2023-11-12 00:51:53,775 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 00:51:53,816 INFO L322 Elim1Store]: treesize reduction 21, result has 41.7 percent of original size [2023-11-12 00:51:53,816 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 26 [2023-11-12 00:51:54,092 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 57 proven. 9 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-11-12 00:51:54,092 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 00:51:55,094 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 57 proven. 16 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2023-11-12 00:51:55,094 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1747777695] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 00:51:55,094 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1373214802] [2023-11-12 00:51:55,102 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2023-11-12 00:51:55,102 INFO L166 IcfgInterpreter]: Building call graph [2023-11-12 00:51:55,102 FATAL L? ?]: Ignoring exception! java.lang.IllegalArgumentException: Recursive programs are not supported. at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.topsortRelevant(CallGraph.java:132) at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.(CallGraph.java:97) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.(IcfgInterpreter.java:92) at de.uni_freiburg.informatik.ultimate.plugins.sifa.SifaBuilder.construct(SifaBuilder.java:96) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:98) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:68) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:267) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:148) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:137) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:337) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:431) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:366) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:416) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:303) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:263) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:176) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:155) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:167) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:150) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:127) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:233) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:227) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:144) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:106) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:319) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2023-11-12 00:51:55,102 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-12 00:51:55,103 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 17] total 31 [2023-11-12 00:51:55,103 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1276944672] [2023-11-12 00:51:55,103 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-12 00:51:55,105 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2023-11-12 00:51:55,106 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:51:55,107 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2023-11-12 00:51:55,108 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=186, Invalid=744, Unknown=0, NotChecked=0, Total=930 [2023-11-12 00:51:55,108 INFO L87 Difference]: Start difference. First operand 29 states and 32 transitions. Second operand has 31 states, 25 states have (on average 2.32) internal successors, (58), 27 states have internal predecessors, (58), 8 states have call successors, (10), 5 states have call predecessors, (10), 7 states have return successors, (11), 6 states have call predecessors, (11), 8 states have call successors, (11) [2023-11-12 00:51:55,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:51:55,306 INFO L93 Difference]: Finished difference Result 57 states and 64 transitions. [2023-11-12 00:51:55,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-12 00:51:55,307 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 25 states have (on average 2.32) internal successors, (58), 27 states have internal predecessors, (58), 8 states have call successors, (10), 5 states have call predecessors, (10), 7 states have return successors, (11), 6 states have call predecessors, (11), 8 states have call successors, (11) Word has length 53 [2023-11-12 00:51:55,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:51:55,308 INFO L225 Difference]: With dead ends: 57 [2023-11-12 00:51:55,308 INFO L226 Difference]: Without dead ends: 32 [2023-11-12 00:51:55,309 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 89 SyntacticMatches, 3 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 422 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=230, Invalid=892, Unknown=0, NotChecked=0, Total=1122 [2023-11-12 00:51:55,310 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 4 mSDsluCounter, 101 mSDsCounter, 0 mSdLazyCounter, 145 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 111 SdHoareTripleChecker+Invalid, 147 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 145 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-12 00:51:55,310 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 111 Invalid, 147 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 145 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-12 00:51:55,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2023-11-12 00:51:55,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2023-11-12 00:51:55,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 24 states have (on average 1.0833333333333333) internal successors, (26), 24 states have internal predecessors, (26), 3 states have call successors, (3), 2 states have call predecessors, (3), 4 states have return successors, (6), 5 states have call predecessors, (6), 3 states have call successors, (6) [2023-11-12 00:51:55,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 35 transitions. [2023-11-12 00:51:55,317 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 35 transitions. Word has length 53 [2023-11-12 00:51:55,317 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:51:55,317 INFO L495 AbstractCegarLoop]: Abstraction has 32 states and 35 transitions. [2023-11-12 00:51:55,317 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 25 states have (on average 2.32) internal successors, (58), 27 states have internal predecessors, (58), 8 states have call successors, (10), 5 states have call predecessors, (10), 7 states have return successors, (11), 6 states have call predecessors, (11), 8 states have call successors, (11) [2023-11-12 00:51:55,318 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 35 transitions. [2023-11-12 00:51:55,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2023-11-12 00:51:55,319 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:51:55,319 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 6, 6, 6, 6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1] [2023-11-12 00:51:55,330 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_695c2f77-a0fc-4901-a28e-b99e9934b810/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-12 00:51:55,525 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_695c2f77-a0fc-4901-a28e-b99e9934b810/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2023-11-12 00:51:55,525 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [recErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, recErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 1 more)] === [2023-11-12 00:51:55,525 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:51:55,525 INFO L85 PathProgramCache]: Analyzing trace with hash 842673830, now seen corresponding path program 2 times [2023-11-12 00:51:55,525 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:51:55,526 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1729114695] [2023-11-12 00:51:55,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:51:55,526 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:51:55,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:51:57,072 INFO L134 CoverageAnalysis]: Checked inductivity of 178 backedges. 9 proven. 120 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2023-11-12 00:51:57,072 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:51:57,072 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1729114695] [2023-11-12 00:51:57,073 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1729114695] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 00:51:57,073 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [858581394] [2023-11-12 00:51:57,073 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-12 00:51:57,073 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:51:57,073 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_695c2f77-a0fc-4901-a28e-b99e9934b810/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 00:51:57,079 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_695c2f77-a0fc-4901-a28e-b99e9934b810/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 00:51:57,111 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_695c2f77-a0fc-4901-a28e-b99e9934b810/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-12 00:51:57,262 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-11-12 00:51:57,262 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-12 00:51:57,265 INFO L262 TraceCheckSpWp]: Trace formula consists of 421 conjuncts, 33 conjunts are in the unsatisfiable core [2023-11-12 00:51:57,274 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 00:51:57,297 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-12 00:51:57,336 INFO L322 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-11-12 00:51:57,337 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 18 [2023-11-12 00:51:57,581 INFO L322 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-11-12 00:51:57,582 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 10 [2023-11-12 00:51:57,586 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2023-11-12 00:51:57,622 INFO L134 CoverageAnalysis]: Checked inductivity of 178 backedges. 50 proven. 4 refuted. 0 times theorem prover too weak. 124 trivial. 0 not checked. [2023-11-12 00:51:57,622 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 00:51:58,038 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2023-11-12 00:51:58,650 INFO L134 CoverageAnalysis]: Checked inductivity of 178 backedges. 54 proven. 0 refuted. 0 times theorem prover too weak. 124 trivial. 0 not checked. [2023-11-12 00:51:58,650 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [858581394] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-12 00:51:58,650 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-11-12 00:51:58,650 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [21, 8] total 33 [2023-11-12 00:51:58,653 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [791793459] [2023-11-12 00:51:58,653 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 00:51:58,654 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-12 00:51:58,654 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:51:58,655 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-12 00:51:58,655 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=957, Unknown=1, NotChecked=0, Total=1056 [2023-11-12 00:51:58,656 INFO L87 Difference]: Start difference. First operand 32 states and 35 transitions. Second operand has 8 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 7 states have internal predecessors, (22), 2 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2023-11-12 00:51:58,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:51:58,831 INFO L93 Difference]: Finished difference Result 32 states and 35 transitions. [2023-11-12 00:51:58,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-12 00:51:58,833 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 7 states have internal predecessors, (22), 2 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) Word has length 69 [2023-11-12 00:51:58,833 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:51:58,834 INFO L225 Difference]: With dead ends: 32 [2023-11-12 00:51:58,834 INFO L226 Difference]: Without dead ends: 0 [2023-11-12 00:51:58,835 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 134 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 328 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=111, Invalid=1148, Unknown=1, NotChecked=0, Total=1260 [2023-11-12 00:51:58,835 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 3 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 63 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-12 00:51:58,836 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 43 Invalid, 63 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 59 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-12 00:51:58,836 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2023-11-12 00:51:58,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2023-11-12 00:51:58,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 00:51:58,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2023-11-12 00:51:58,837 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 69 [2023-11-12 00:51:58,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:51:58,837 INFO L495 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2023-11-12 00:51:58,837 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 7 states have internal predecessors, (22), 2 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2023-11-12 00:51:58,837 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2023-11-12 00:51:58,837 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2023-11-12 00:51:58,842 INFO L805 garLoopResultBuilder]: Registering result SAFE for location recErr0ASSERT_VIOLATIONINTEGER_OVERFLOW (3 of 4 remaining) [2023-11-12 00:51:58,843 INFO L805 garLoopResultBuilder]: Registering result SAFE for location recErr1ASSERT_VIOLATIONINTEGER_OVERFLOW (2 of 4 remaining) [2023-11-12 00:51:58,843 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW (1 of 4 remaining) [2023-11-12 00:51:58,843 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW (0 of 4 remaining) [2023-11-12 00:51:58,855 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_695c2f77-a0fc-4901-a28e-b99e9934b810/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-12 00:51:59,050 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_695c2f77-a0fc-4901-a28e-b99e9934b810/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-11-12 00:51:59,052 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2023-11-12 00:51:59,220 INFO L895 garLoopResultBuilder]: At program point L17(line 17) the Hoare annotation is: (or (< 2147483647 (select (select |old(#memory_int)| |rec_#in~p.base|) |rec_#in~p.offset|)) (let ((.cse0 (select |old(#memory_int)| rec_~p.base)) (.cse1 (select (select |#memory_int| rec_~p.base) rec_~p.offset))) (and (<= (select .cse0 rec_~p.offset) (+ .cse1 1)) (= |rec_#in~p.base| rec_~p.base) (= |rec_#in~p.offset| rec_~p.offset) (= |#memory_int| (store |old(#memory_int)| rec_~p.base (store .cse0 rec_~p.offset .cse1))) (<= .cse1 2147483647)))) [2023-11-12 00:51:59,220 INFO L899 garLoopResultBuilder]: For program point L16(line 16) no Hoare annotation was computed. [2023-11-12 00:51:59,220 INFO L899 garLoopResultBuilder]: For program point L17-1(line 17) no Hoare annotation was computed. [2023-11-12 00:51:59,220 INFO L899 garLoopResultBuilder]: For program point L16-1(line 16) no Hoare annotation was computed. [2023-11-12 00:51:59,220 INFO L899 garLoopResultBuilder]: For program point recFINAL(lines 8 18) no Hoare annotation was computed. [2023-11-12 00:51:59,221 INFO L895 garLoopResultBuilder]: At program point $Ultimate##0(lines 8 18) the Hoare annotation is: (or (< 2147483647 (select (select |old(#memory_int)| |rec_#in~p.base|) |rec_#in~p.offset|)) (= |#memory_int| |old(#memory_int)|)) [2023-11-12 00:51:59,221 INFO L899 garLoopResultBuilder]: For program point L9(lines 9 14) no Hoare annotation was computed. [2023-11-12 00:51:59,221 INFO L899 garLoopResultBuilder]: For program point recEXIT(lines 8 18) no Hoare annotation was computed. [2023-11-12 00:51:59,221 INFO L899 garLoopResultBuilder]: For program point recErr1ASSERT_VIOLATIONINTEGER_OVERFLOW(line 16) no Hoare annotation was computed. [2023-11-12 00:51:59,221 INFO L899 garLoopResultBuilder]: For program point recErr0ASSERT_VIOLATIONINTEGER_OVERFLOW(line 16) no Hoare annotation was computed. [2023-11-12 00:51:59,221 INFO L899 garLoopResultBuilder]: For program point ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW(line 26) no Hoare annotation was computed. [2023-11-12 00:51:59,221 INFO L899 garLoopResultBuilder]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2023-11-12 00:51:59,221 INFO L899 garLoopResultBuilder]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW(line 26) no Hoare annotation was computed. [2023-11-12 00:51:59,222 INFO L895 garLoopResultBuilder]: At program point L26(line 26) the Hoare annotation is: (let ((.cse0 (select (select |#memory_int| |ULTIMATE.start_main_~op~0#1.base|) 0)) (.cse1 (select (select |#memory_int| |ULTIMATE.start_main_~ip~0#1.base|) |ULTIMATE.start_main_~ip~0#1.offset|))) (and (<= .cse0 2147483647) (<= 2 .cse0) (<= |ULTIMATE.start_main_#t~mem13#1| 2147483648) (<= .cse1 2147483647) (= |ULTIMATE.start_main_~op~0#1.offset| 0) (or (< |ULTIMATE.start_main_#t~mem9#1| 2) (< 1 .cse1)) (<= 0 |ULTIMATE.start_main_#t~mem13#1|))) [2023-11-12 00:51:59,222 INFO L899 garLoopResultBuilder]: For program point L26-1(line 26) no Hoare annotation was computed. [2023-11-12 00:51:59,222 INFO L899 garLoopResultBuilder]: For program point L26-2(line 26) no Hoare annotation was computed. [2023-11-12 00:51:59,222 INFO L899 garLoopResultBuilder]: For program point L26-3(line 26) no Hoare annotation was computed. [2023-11-12 00:51:59,222 INFO L899 garLoopResultBuilder]: For program point L23-1(lines 23 27) no Hoare annotation was computed. [2023-11-12 00:51:59,222 INFO L895 garLoopResultBuilder]: At program point L23-3(lines 23 27) the Hoare annotation is: (<= (select (select |#memory_int| |ULTIMATE.start_main_~ip~0#1.base|) |ULTIMATE.start_main_~ip~0#1.offset|) 2147483647) [2023-11-12 00:51:59,222 INFO L899 garLoopResultBuilder]: For program point L20(lines 20 28) no Hoare annotation was computed. [2023-11-12 00:51:59,222 INFO L899 garLoopResultBuilder]: For program point $Ultimate##0(line -1) no Hoare annotation was computed. [2023-11-12 00:51:59,227 INFO L445 BasicCegarLoop]: Path program histogram: [2, 2, 1, 1, 1, 1, 1, 1] [2023-11-12 00:51:59,229 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2023-11-12 00:51:59,241 WARN L1567 BoogieBacktranslator]: Unfinished Backtranslation: ArrayAccessExpression #memory_int[~ip~0!base][~ip~0!offset] could not be translated [2023-11-12 00:51:59,244 WARN L1567 BoogieBacktranslator]: Unfinished Backtranslation: ArrayAccessExpression #memory_int[~ip~0!base][~ip~0!offset] could not be translated [2023-11-12 00:51:59,244 ERROR L464 ceAbstractionStarter]: Failed to backtranslate (<= (select (select |#memory_int| |ULTIMATE.start_main_~ip~0#1.base|) |ULTIMATE.start_main_~ip~0#1.offset|) 2147483647) [2023-11-12 00:51:59,244 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 12.11 12:51:59 BoogieIcfgContainer [2023-11-12 00:51:59,244 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-11-12 00:51:59,245 INFO L112 PluginConnector]: ------------------------Witness Printer---------------------------- [2023-11-12 00:51:59,245 INFO L270 PluginConnector]: Initializing Witness Printer... [2023-11-12 00:51:59,245 INFO L274 PluginConnector]: Witness Printer initialized [2023-11-12 00:51:59,246 INFO L184 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 12:51:45" (3/4) ... [2023-11-12 00:51:59,248 INFO L137 WitnessPrinter]: Generating witness for correct program [2023-11-12 00:51:59,251 INFO L361 RCFGBacktranslator]: Ignoring RootEdge to procedure rec [2023-11-12 00:51:59,274 INFO L944 BoogieBacktranslator]: Reduced CFG by removing 9 nodes and edges [2023-11-12 00:51:59,275 INFO L944 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2023-11-12 00:51:59,275 INFO L944 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2023-11-12 00:51:59,275 INFO L944 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2023-11-12 00:51:59,355 INFO L149 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_695c2f77-a0fc-4901-a28e-b99e9934b810/bin/utaipan-verify-NcY6lQBIFX/witness.graphml [2023-11-12 00:51:59,355 INFO L149 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_695c2f77-a0fc-4901-a28e-b99e9934b810/bin/utaipan-verify-NcY6lQBIFX/witness.yml [2023-11-12 00:51:59,355 INFO L131 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2023-11-12 00:51:59,356 INFO L158 Benchmark]: Toolchain (without parser) took 14806.21ms. Allocated memory was 174.1MB in the beginning and 310.4MB in the end (delta: 136.3MB). Free memory was 130.6MB in the beginning and 277.3MB in the end (delta: -146.8MB). Peak memory consumption was 166.2MB. Max. memory is 16.1GB. [2023-11-12 00:51:59,356 INFO L158 Benchmark]: CDTParser took 2.26ms. Allocated memory is still 123.7MB. Free memory is still 70.0MB. There was no memory consumed. Max. memory is 16.1GB. [2023-11-12 00:51:59,357 INFO L158 Benchmark]: CACSL2BoogieTranslator took 283.47ms. Allocated memory is still 174.1MB. Free memory was 130.1MB in the beginning and 120.5MB in the end (delta: 9.6MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2023-11-12 00:51:59,357 INFO L158 Benchmark]: Boogie Procedure Inliner took 34.49ms. Allocated memory is still 174.1MB. Free memory was 120.5MB in the beginning and 119.1MB in the end (delta: 1.4MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2023-11-12 00:51:59,357 INFO L158 Benchmark]: Boogie Preprocessor took 49.27ms. Allocated memory is still 174.1MB. Free memory was 119.1MB in the beginning and 118.0MB in the end (delta: 1.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2023-11-12 00:51:59,358 INFO L158 Benchmark]: RCFGBuilder took 365.02ms. Allocated memory is still 174.1MB. Free memory was 118.0MB in the beginning and 105.8MB in the end (delta: 12.2MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2023-11-12 00:51:59,358 INFO L158 Benchmark]: TraceAbstraction took 13954.77ms. Allocated memory was 174.1MB in the beginning and 310.4MB in the end (delta: 136.3MB). Free memory was 105.0MB in the beginning and 104.4MB in the end (delta: 618.0kB). Peak memory consumption was 137.8MB. Max. memory is 16.1GB. [2023-11-12 00:51:59,358 INFO L158 Benchmark]: Witness Printer took 110.63ms. Allocated memory is still 310.4MB. Free memory was 104.4MB in the beginning and 277.3MB in the end (delta: -173.0MB). Peak memory consumption was 3.2MB. Max. memory is 16.1GB. [2023-11-12 00:51:59,361 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 2.26ms. Allocated memory is still 123.7MB. Free memory is still 70.0MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 283.47ms. Allocated memory is still 174.1MB. Free memory was 130.1MB in the beginning and 120.5MB in the end (delta: 9.6MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 34.49ms. Allocated memory is still 174.1MB. Free memory was 120.5MB in the beginning and 119.1MB in the end (delta: 1.4MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 49.27ms. Allocated memory is still 174.1MB. Free memory was 119.1MB in the beginning and 118.0MB in the end (delta: 1.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 365.02ms. Allocated memory is still 174.1MB. Free memory was 118.0MB in the beginning and 105.8MB in the end (delta: 12.2MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * TraceAbstraction took 13954.77ms. Allocated memory was 174.1MB in the beginning and 310.4MB in the end (delta: 136.3MB). Free memory was 105.0MB in the beginning and 104.4MB in the end (delta: 618.0kB). Peak memory consumption was 137.8MB. Max. memory is 16.1GB. * Witness Printer took 110.63ms. Allocated memory is still 310.4MB. Free memory was 104.4MB in the beginning and 277.3MB in the end (delta: -173.0MB). Peak memory consumption was 3.2MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: ArrayAccessExpression #memory_int[~ip~0!base][~ip~0!offset] could not be translated - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: ArrayAccessExpression #memory_int[~ip~0!base][~ip~0!offset] could not be translated * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 16]: integer overflow can never occur For all program executions holds that integer overflow can never occur at this location - PositiveResult [Line: 16]: integer overflow can never occur For all program executions holds that integer overflow can never occur at this location - PositiveResult [Line: 26]: integer overflow can never occur For all program executions holds that integer overflow can never occur at this location - PositiveResult [Line: 26]: integer overflow can never occur For all program executions holds that integer overflow can never occur at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 21 locations, 4 error locations. Started 1 CEGAR loops. OverallTime: 13.9s, OverallIterations: 10, TraceHistogramMax: 8, PathProgramHistogramMax: 2, EmptinessCheckTime: 0.0s, AutomataDifference: 1.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.2s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 61 SdHoareTripleChecker+Valid, 0.7s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 61 mSDsluCounter, 622 SdHoareTripleChecker+Invalid, 0.6s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 510 mSDsCounter, 22 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 689 IncrementalHoareTripleChecker+Invalid, 711 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 22 mSolverCounterUnsat, 112 mSDtfsCounter, 689 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 588 GetRequests, 416 SyntacticMatches, 4 SemanticMatches, 168 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1240 ImplicationChecksByTransitivity, 2.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=32occurred in iteration=9, InterpolantAutomatonStates: 80, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 10 MinimizatonAttempts, 18 StatesRemovedByMinimization, 4 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 4 LocationsWithAnnotation, 20 PreInvPairs, 24 NumberOfFragments, 110 HoareAnnotationTreeSize, 20 FomulaSimplifications, 20 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 4 FomulaSimplificationsInter, 331 FormulaSimplificationTreeSizeReductionInter, 0.2s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.2s SsaConstructionTime, 0.4s SatisfiabilityAnalysisTime, 9.6s InterpolantComputationTime, 531 NumberOfCodeBlocks, 481 NumberOfCodeBlocksAsserted, 19 NumberOfCheckSat, 721 ConstructedInterpolants, 15 QuantifiedInterpolants, 3594 SizeOfPredicates, 58 NumberOfNonLiveVariables, 1407 ConjunctsInSsa, 161 ConjunctsInUnsatCore, 20 InterpolantComputations, 8 PerfectInterpolantSequences, 882/1189 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 4 specifications checked. All of them hold - InvariantResult [Line: 23]: Loop Invariant [2023-11-12 00:51:59,368 WARN L1567 BoogieBacktranslator]: Unfinished Backtranslation: ArrayAccessExpression #memory_int[~ip~0!base][~ip~0!offset] could not be translated [2023-11-12 00:51:59,369 WARN L1567 BoogieBacktranslator]: Unfinished Backtranslation: ArrayAccessExpression #memory_int[~ip~0!base][~ip~0!offset] could not be translated Derived loop invariant: NULL RESULT: Ultimate proved your program to be correct! [2023-11-12 00:51:59,382 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_695c2f77-a0fc-4901-a28e-b99e9934b810/bin/utaipan-verify-NcY6lQBIFX/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: TRUE