./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/loops-crafted-1/loopv2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 826ab2ba Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c7f0a8d-a9db-4df0-825a-7bac745910b9/bin/utaipan-verify-sOmjnqqW8E/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c7f0a8d-a9db-4df0-825a-7bac745910b9/bin/utaipan-verify-sOmjnqqW8E/plugins/org.eclipse.equinox.launcher_1.6.800.v20240513-1750.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c7f0a8d-a9db-4df0-825a-7bac745910b9/bin/utaipan-verify-sOmjnqqW8E/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c7f0a8d-a9db-4df0-825a-7bac745910b9/bin/utaipan-verify-sOmjnqqW8E/config/TaipanReach.xml -i ../../sv-benchmarks/c/loops-crafted-1/loopv2.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c7f0a8d-a9db-4df0-825a-7bac745910b9/bin/utaipan-verify-sOmjnqqW8E/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c7f0a8d-a9db-4df0-825a-7bac745910b9/bin/utaipan-verify-sOmjnqqW8E --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash c8ee88878035a7d0dcaaed453412906e138032b7646709b0475a2b7f1b3ea855 --- Real Ultimate output --- This is Ultimate 0.3.0-dev-826ab2b [2024-11-14 02:55:56,277 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-14 02:55:56,363 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c7f0a8d-a9db-4df0-825a-7bac745910b9/bin/utaipan-verify-sOmjnqqW8E/config/svcomp-Reach-32bit-Taipan_Default.epf [2024-11-14 02:55:56,368 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-14 02:55:56,368 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-14 02:55:56,394 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-14 02:55:56,395 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-14 02:55:56,395 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-14 02:55:56,395 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-14 02:55:56,395 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-14 02:55:56,396 INFO L153 SettingsManager]: * User list type=DISABLED [2024-11-14 02:55:56,396 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2024-11-14 02:55:56,396 INFO L153 SettingsManager]: * Explicit value domain=true [2024-11-14 02:55:56,396 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2024-11-14 02:55:56,396 INFO L153 SettingsManager]: * Octagon Domain=false [2024-11-14 02:55:56,396 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2024-11-14 02:55:56,396 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2024-11-14 02:55:56,396 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2024-11-14 02:55:56,396 INFO L153 SettingsManager]: * Interval Domain=false [2024-11-14 02:55:56,396 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2024-11-14 02:55:56,397 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2024-11-14 02:55:56,397 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2024-11-14 02:55:56,397 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-14 02:55:56,397 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-14 02:55:56,397 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-14 02:55:56,397 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-14 02:55:56,397 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-14 02:55:56,397 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-14 02:55:56,398 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-14 02:55:56,398 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-14 02:55:56,398 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-14 02:55:56,398 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-14 02:55:56,398 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-14 02:55:56,398 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-14 02:55:56,398 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-14 02:55:56,398 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-14 02:55:56,398 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-14 02:55:56,398 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-14 02:55:56,398 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2024-11-14 02:55:56,399 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-14 02:55:56,399 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-14 02:55:56,399 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-14 02:55:56,399 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2024-11-14 02:55:56,399 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-14 02:55:56,399 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-14 02:55:56,399 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2024-11-14 02:55:56,399 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-14 02:55:56,399 INFO L153 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES 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_5c7f0a8d-a9db-4df0-825a-7bac745910b9/bin/utaipan-verify-sOmjnqqW8E 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 ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c8ee88878035a7d0dcaaed453412906e138032b7646709b0475a2b7f1b3ea855 [2024-11-14 02:55:56,698 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-14 02:55:56,709 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-14 02:55:56,713 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-14 02:55:56,714 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-14 02:55:56,715 INFO L274 PluginConnector]: CDTParser initialized [2024-11-14 02:55:56,716 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c7f0a8d-a9db-4df0-825a-7bac745910b9/bin/utaipan-verify-sOmjnqqW8E/../../sv-benchmarks/c/loops-crafted-1/loopv2.c Unable to find full path for "g++" [2024-11-14 02:55:58,476 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-14 02:55:58,713 INFO L384 CDTParser]: Found 1 translation units. [2024-11-14 02:55:58,714 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c7f0a8d-a9db-4df0-825a-7bac745910b9/sv-benchmarks/c/loops-crafted-1/loopv2.c [2024-11-14 02:55:58,725 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c7f0a8d-a9db-4df0-825a-7bac745910b9/bin/utaipan-verify-sOmjnqqW8E/data/e274cac52/996931b8e0774c81aabeabaf438d2c01/FLAG29ee96837 [2024-11-14 02:55:58,740 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c7f0a8d-a9db-4df0-825a-7bac745910b9/bin/utaipan-verify-sOmjnqqW8E/data/e274cac52/996931b8e0774c81aabeabaf438d2c01 [2024-11-14 02:55:58,742 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-14 02:55:58,744 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-14 02:55:58,747 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-14 02:55:58,747 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-14 02:55:58,751 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-14 02:55:58,752 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.11 02:55:58" (1/1) ... [2024-11-14 02:55:58,753 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@173c5a08 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 02:55:58, skipping insertion in model container [2024-11-14 02:55:58,753 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.11 02:55:58" (1/1) ... [2024-11-14 02:55:58,768 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-14 02:55:58,912 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c7f0a8d-a9db-4df0-825a-7bac745910b9/sv-benchmarks/c/loops-crafted-1/loopv2.c[454,467] [2024-11-14 02:55:58,925 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-14 02:55:58,934 INFO L200 MainTranslator]: Completed pre-run [2024-11-14 02:55:58,944 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c7f0a8d-a9db-4df0-825a-7bac745910b9/sv-benchmarks/c/loops-crafted-1/loopv2.c[454,467] [2024-11-14 02:55:58,948 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-14 02:55:58,963 INFO L204 MainTranslator]: Completed translation [2024-11-14 02:55:58,963 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 02:55:58 WrapperNode [2024-11-14 02:55:58,963 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-14 02:55:58,964 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-14 02:55:58,964 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-14 02:55:58,964 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-14 02:55:58,971 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 02:55:58" (1/1) ... [2024-11-14 02:55:58,977 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 02:55:58" (1/1) ... [2024-11-14 02:55:58,992 INFO L138 Inliner]: procedures = 14, calls = 8, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 43 [2024-11-14 02:55:58,992 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-14 02:55:58,993 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-14 02:55:58,993 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-14 02:55:58,993 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-14 02:55:58,999 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 02:55:58" (1/1) ... [2024-11-14 02:55:59,000 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 02:55:58" (1/1) ... [2024-11-14 02:55:59,000 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 02:55:58" (1/1) ... [2024-11-14 02:55:59,001 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 02:55:58" (1/1) ... [2024-11-14 02:55:59,003 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 02:55:58" (1/1) ... [2024-11-14 02:55:59,006 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 02:55:58" (1/1) ... [2024-11-14 02:55:59,007 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 02:55:58" (1/1) ... [2024-11-14 02:55:59,007 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 02:55:58" (1/1) ... [2024-11-14 02:55:59,008 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-14 02:55:59,009 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-14 02:55:59,009 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-14 02:55:59,009 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-14 02:55:59,010 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 02:55:58" (1/1) ... [2024-11-14 02:55:59,024 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2024-11-14 02:55:59,036 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c7f0a8d-a9db-4df0-825a-7bac745910b9/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 02:55:59,050 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c7f0a8d-a9db-4df0-825a-7bac745910b9/bin/utaipan-verify-sOmjnqqW8E/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2024-11-14 02:55:59,054 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c7f0a8d-a9db-4df0-825a-7bac745910b9/bin/utaipan-verify-sOmjnqqW8E/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2024-11-14 02:55:59,082 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-14 02:55:59,082 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2024-11-14 02:55:59,082 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-14 02:55:59,082 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-14 02:55:59,157 INFO L238 CfgBuilder]: Building ICFG [2024-11-14 02:55:59,159 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-14 02:55:59,290 INFO L? ?]: Removed 10 outVars from TransFormulas that were not future-live. [2024-11-14 02:55:59,290 INFO L287 CfgBuilder]: Performing block encoding [2024-11-14 02:55:59,331 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-14 02:55:59,331 INFO L316 CfgBuilder]: Removed 2 assume(true) statements. [2024-11-14 02:55:59,331 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.11 02:55:59 BoogieIcfgContainer [2024-11-14 02:55:59,331 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-14 02:55:59,334 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-14 02:55:59,335 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-14 02:55:59,339 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-14 02:55:59,340 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.11 02:55:58" (1/3) ... [2024-11-14 02:55:59,340 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@745874c3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.11 02:55:59, skipping insertion in model container [2024-11-14 02:55:59,341 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 02:55:58" (2/3) ... [2024-11-14 02:55:59,341 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@745874c3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.11 02:55:59, skipping insertion in model container [2024-11-14 02:55:59,341 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.11 02:55:59" (3/3) ... [2024-11-14 02:55:59,342 INFO L112 eAbstractionObserver]: Analyzing ICFG loopv2.c [2024-11-14 02:55:59,359 INFO L217 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-14 02:55:59,360 INFO L154 ceAbstractionStarter]: Applying trace abstraction to ICFG loopv2.c that has 1 procedures, 10 locations, 1 initial locations, 2 loop locations, and 1 error locations. [2024-11-14 02:55:59,426 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-14 02:55:59,444 INFO L333 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, 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;@60af2a12, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-14 02:55:59,444 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-11-14 02:55:59,448 INFO L276 IsEmpty]: Start isEmpty. Operand has 10 states, 8 states have (on average 1.625) internal successors, (13), 9 states have internal predecessors, (13), 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) [2024-11-14 02:55:59,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2024-11-14 02:55:59,458 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 02:55:59,459 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2024-11-14 02:55:59,459 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 02:55:59,464 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 02:55:59,465 INFO L85 PathProgramCache]: Analyzing trace with hash -2082490502, now seen corresponding path program 1 times [2024-11-14 02:55:59,474 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 02:55:59,474 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1381925909] [2024-11-14 02:55:59,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 02:55:59,475 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 02:55:59,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 02:55:59,856 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 02:55:59,858 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 02:55:59,859 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1381925909] [2024-11-14 02:55:59,859 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1381925909] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 02:55:59,862 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-14 02:55:59,863 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-14 02:55:59,864 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2115914309] [2024-11-14 02:55:59,865 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 02:55:59,869 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-14 02:55:59,870 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 02:55:59,886 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-14 02:55:59,887 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-14 02:55:59,889 INFO L87 Difference]: Start difference. First operand has 10 states, 8 states have (on average 1.625) internal successors, (13), 9 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 02:55:59,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 02:55:59,924 INFO L93 Difference]: Finished difference Result 18 states and 23 transitions. [2024-11-14 02:55:59,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-14 02:55:59,927 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2024-11-14 02:55:59,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 02:55:59,933 INFO L225 Difference]: With dead ends: 18 [2024-11-14 02:55:59,933 INFO L226 Difference]: Without dead ends: 9 [2024-11-14 02:55:59,936 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-14 02:55:59,939 INFO L432 NwaCegarLoop]: 7 mSDtfsCounter, 0 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-14 02:55:59,939 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 12 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-14 02:55:59,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states. [2024-11-14 02:55:59,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 9. [2024-11-14 02:55:59,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9 states, 8 states have (on average 1.375) internal successors, (11), 8 states have internal predecessors, (11), 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) [2024-11-14 02:55:59,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 11 transitions. [2024-11-14 02:55:59,968 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 11 transitions. Word has length 6 [2024-11-14 02:55:59,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 02:55:59,969 INFO L471 AbstractCegarLoop]: Abstraction has 9 states and 11 transitions. [2024-11-14 02:55:59,969 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 02:55:59,969 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 11 transitions. [2024-11-14 02:55:59,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2024-11-14 02:55:59,970 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 02:55:59,970 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-11-14 02:55:59,970 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-14 02:55:59,971 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 02:55:59,971 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 02:55:59,971 INFO L85 PathProgramCache]: Analyzing trace with hash -133337135, now seen corresponding path program 1 times [2024-11-14 02:55:59,972 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 02:55:59,972 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1064008165] [2024-11-14 02:55:59,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 02:55:59,972 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 02:55:59,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 02:56:00,174 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 02:56:00,174 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 02:56:00,175 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1064008165] [2024-11-14 02:56:00,175 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1064008165] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 02:56:00,175 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [47467138] [2024-11-14 02:56:00,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 02:56:00,175 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 02:56:00,175 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c7f0a8d-a9db-4df0-825a-7bac745910b9/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 02:56:00,177 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c7f0a8d-a9db-4df0-825a-7bac745910b9/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 02:56:00,178 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c7f0a8d-a9db-4df0-825a-7bac745910b9/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-14 02:56:00,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 02:56:00,235 INFO L255 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-11-14 02:56:00,239 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 02:56:00,276 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 02:56:00,276 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 02:56:00,320 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-14 02:56:00,320 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [47467138] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-14 02:56:00,320 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-14 02:56:00,320 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4, 4] total 5 [2024-11-14 02:56:00,321 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1233162456] [2024-11-14 02:56:00,321 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 02:56:00,321 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-14 02:56:00,322 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 02:56:00,322 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-14 02:56:00,322 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2024-11-14 02:56:00,322 INFO L87 Difference]: Start difference. First operand 9 states and 11 transitions. Second operand has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 02:56:00,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 02:56:00,344 INFO L93 Difference]: Finished difference Result 13 states and 15 transitions. [2024-11-14 02:56:00,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-14 02:56:00,346 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2024-11-14 02:56:00,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 02:56:00,347 INFO L225 Difference]: With dead ends: 13 [2024-11-14 02:56:00,347 INFO L226 Difference]: Without dead ends: 8 [2024-11-14 02:56:00,348 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2024-11-14 02:56:00,348 INFO L432 NwaCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-14 02:56:00,349 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 6 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-14 02:56:00,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8 states. [2024-11-14 02:56:00,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8 to 8. [2024-11-14 02:56:00,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8 states, 7 states have (on average 1.1428571428571428) internal successors, (8), 7 states have internal predecessors, (8), 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) [2024-11-14 02:56:00,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 8 transitions. [2024-11-14 02:56:00,353 INFO L78 Accepts]: Start accepts. Automaton has 8 states and 8 transitions. Word has length 7 [2024-11-14 02:56:00,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 02:56:00,354 INFO L471 AbstractCegarLoop]: Abstraction has 8 states and 8 transitions. [2024-11-14 02:56:00,354 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 02:56:00,355 INFO L276 IsEmpty]: Start isEmpty. Operand 8 states and 8 transitions. [2024-11-14 02:56:00,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2024-11-14 02:56:00,356 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 02:56:00,356 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-11-14 02:56:00,373 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c7f0a8d-a9db-4df0-825a-7bac745910b9/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-14 02:56:00,560 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c7f0a8d-a9db-4df0-825a-7bac745910b9/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 02:56:00,560 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 02:56:00,561 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 02:56:00,561 INFO L85 PathProgramCache]: Analyzing trace with hash -165868907, now seen corresponding path program 1 times [2024-11-14 02:56:00,562 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 02:56:00,562 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1408319384] [2024-11-14 02:56:00,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 02:56:00,562 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 02:56:00,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 02:56:00,722 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 02:56:00,722 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 02:56:00,722 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1408319384] [2024-11-14 02:56:00,722 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1408319384] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 02:56:00,722 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1219315818] [2024-11-14 02:56:00,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 02:56:00,723 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 02:56:00,723 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c7f0a8d-a9db-4df0-825a-7bac745910b9/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 02:56:00,727 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c7f0a8d-a9db-4df0-825a-7bac745910b9/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 02:56:00,728 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c7f0a8d-a9db-4df0-825a-7bac745910b9/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-14 02:56:00,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 02:56:00,797 INFO L255 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-11-14 02:56:00,798 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 02:56:00,825 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 02:56:00,825 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 02:56:00,869 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 02:56:00,869 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1219315818] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 02:56:00,869 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2030100148] [2024-11-14 02:56:00,898 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2024-11-14 02:56:00,898 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 02:56:00,901 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 02:56:00,905 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 02:56:00,905 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 02:56:01,338 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 02:56:05,778 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '166#(and (exists ((|v_ULTIMATE.start_main_~n~0#1_17| Int) (|v_ULTIMATE.start_main_~j~0#1_27| Int) (|v_ULTIMATE.start_main_~k~0#1_21| Int)) (and (not (= (mod |v_ULTIMATE.start_main_~j~0#1_27| 2) 0)) (<= 1 |#StackHeapBarrier|) (<= 0 |v_ULTIMATE.start_main_~k~0#1_21|) (<= |v_ULTIMATE.start_main_~n~0#1_17| 50000001) (<= 0 |v_ULTIMATE.start_main_~j~0#1_27|) (<= 0 (+ |v_ULTIMATE.start_main_~n~0#1_17| 2147483648)) (<= |v_ULTIMATE.start_main_~n~0#1_17| |v_ULTIMATE.start_main_~k~0#1_21|) (not (= (mod |v_ULTIMATE.start_main_~k~0#1_21| 2) 0)))) (= ~SIZE~0 50000001))' at error location [2024-11-14 02:56:05,778 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 02:56:05,778 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 02:56:05,778 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2024-11-14 02:56:05,778 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2087612049] [2024-11-14 02:56:05,778 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 02:56:05,779 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-14 02:56:05,779 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 02:56:05,781 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-14 02:56:05,782 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=103, Unknown=2, NotChecked=0, Total=132 [2024-11-14 02:56:05,783 INFO L87 Difference]: Start difference. First operand 8 states and 8 transitions. Second operand has 7 states, 7 states have (on average 2.0) internal successors, (14), 7 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 02:56:05,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 02:56:05,856 INFO L93 Difference]: Finished difference Result 10 states and 11 transitions. [2024-11-14 02:56:05,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-14 02:56:05,856 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.0) internal successors, (14), 7 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2024-11-14 02:56:05,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 02:56:05,857 INFO L225 Difference]: With dead ends: 10 [2024-11-14 02:56:05,857 INFO L226 Difference]: Without dead ends: 0 [2024-11-14 02:56:05,857 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=44, Invalid=164, Unknown=2, NotChecked=0, Total=210 [2024-11-14 02:56:05,859 INFO L432 NwaCegarLoop]: 1 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-14 02:56:05,860 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 1 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-14 02:56:05,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2024-11-14 02:56:05,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2024-11-14 02:56:05,862 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) [2024-11-14 02:56:05,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2024-11-14 02:56:05,863 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 7 [2024-11-14 02:56:05,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 02:56:05,863 INFO L471 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2024-11-14 02:56:05,863 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.0) internal successors, (14), 7 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 02:56:05,863 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2024-11-14 02:56:05,863 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2024-11-14 02:56:05,866 INFO L782 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2024-11-14 02:56:05,886 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c7f0a8d-a9db-4df0-825a-7bac745910b9/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-11-14 02:56:06,067 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c7f0a8d-a9db-4df0-825a-7bac745910b9/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 02:56:06,069 INFO L407 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2024-11-14 02:56:06,071 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2024-11-14 02:56:06,112 INFO L173 ceAbstractionStarter]: Computing trace abstraction results [2024-11-14 02:56:06,125 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 14.11 02:56:06 BoogieIcfgContainer [2024-11-14 02:56:06,125 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2024-11-14 02:56:06,126 INFO L112 PluginConnector]: ------------------------Witness Printer---------------------------- [2024-11-14 02:56:06,126 INFO L270 PluginConnector]: Initializing Witness Printer... [2024-11-14 02:56:06,126 INFO L274 PluginConnector]: Witness Printer initialized [2024-11-14 02:56:06,127 INFO L184 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.11 02:55:59" (3/4) ... [2024-11-14 02:56:06,129 INFO L142 WitnessPrinter]: Generating witness for correct program [2024-11-14 02:56:06,134 INFO L925 BoogieBacktranslator]: Reduced CFG by removing 12 nodes and edges [2024-11-14 02:56:06,134 INFO L925 BoogieBacktranslator]: Reduced CFG by removing 5 nodes and edges [2024-11-14 02:56:06,135 INFO L925 BoogieBacktranslator]: Reduced CFG by removing 3 nodes and edges [2024-11-14 02:56:06,135 INFO L925 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2024-11-14 02:56:06,208 INFO L149 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c7f0a8d-a9db-4df0-825a-7bac745910b9/bin/utaipan-verify-sOmjnqqW8E/witness.graphml [2024-11-14 02:56:06,209 INFO L149 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c7f0a8d-a9db-4df0-825a-7bac745910b9/bin/utaipan-verify-sOmjnqqW8E/witness.yml [2024-11-14 02:56:06,210 INFO L131 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2024-11-14 02:56:06,211 INFO L158 Benchmark]: Toolchain (without parser) took 7466.79ms. Allocated memory is still 117.4MB. Free memory was 92.9MB in the beginning and 70.6MB in the end (delta: 22.4MB). Peak memory consumption was 21.4MB. Max. memory is 16.1GB. [2024-11-14 02:56:06,212 INFO L158 Benchmark]: CDTParser took 1.44ms. Allocated memory is still 117.4MB. Free memory is still 74.2MB. There was no memory consumed. Max. memory is 16.1GB. [2024-11-14 02:56:06,212 INFO L158 Benchmark]: CACSL2BoogieTranslator took 217.01ms. Allocated memory is still 117.4MB. Free memory was 92.7MB in the beginning and 81.8MB in the end (delta: 10.9MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2024-11-14 02:56:06,212 INFO L158 Benchmark]: Boogie Procedure Inliner took 28.43ms. Allocated memory is still 117.4MB. Free memory was 81.8MB in the beginning and 80.8MB in the end (delta: 1.1MB). There was no memory consumed. Max. memory is 16.1GB. [2024-11-14 02:56:06,212 INFO L158 Benchmark]: Boogie Preprocessor took 15.56ms. Allocated memory is still 117.4MB. Free memory was 80.8MB in the beginning and 80.1MB in the end (delta: 624.4kB). There was no memory consumed. Max. memory is 16.1GB. [2024-11-14 02:56:06,213 INFO L158 Benchmark]: RCFGBuilder took 322.40ms. Allocated memory is still 117.4MB. Free memory was 80.0MB in the beginning and 69.5MB in the end (delta: 10.4MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. [2024-11-14 02:56:06,215 INFO L158 Benchmark]: TraceAbstraction took 6790.75ms. Allocated memory is still 117.4MB. Free memory was 69.0MB in the beginning and 74.4MB in the end (delta: -5.4MB). There was no memory consumed. Max. memory is 16.1GB. [2024-11-14 02:56:06,215 INFO L158 Benchmark]: Witness Printer took 83.91ms. Allocated memory is still 117.4MB. Free memory was 74.4MB in the beginning and 70.6MB in the end (delta: 3.8MB). There was no memory consumed. Max. memory is 16.1GB. [2024-11-14 02:56:06,217 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 1.44ms. Allocated memory is still 117.4MB. Free memory is still 74.2MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 217.01ms. Allocated memory is still 117.4MB. Free memory was 92.7MB in the beginning and 81.8MB in the end (delta: 10.9MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 28.43ms. Allocated memory is still 117.4MB. Free memory was 81.8MB in the beginning and 80.8MB in the end (delta: 1.1MB). There was no memory consumed. Max. memory is 16.1GB. * Boogie Preprocessor took 15.56ms. Allocated memory is still 117.4MB. Free memory was 80.8MB in the beginning and 80.1MB in the end (delta: 624.4kB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 322.40ms. Allocated memory is still 117.4MB. Free memory was 80.0MB in the beginning and 69.5MB in the end (delta: 10.4MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. * TraceAbstraction took 6790.75ms. Allocated memory is still 117.4MB. Free memory was 69.0MB in the beginning and 74.4MB in the end (delta: -5.4MB). There was no memory consumed. Max. memory is 16.1GB. * Witness Printer took 83.91ms. Allocated memory is still 117.4MB. Free memory was 74.4MB in the beginning and 70.6MB in the end (delta: 3.8MB). There was no memory consumed. Max. memory is 16.1GB. * 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: 12]: a call to reach_error is unreachable For all program executions holds that a call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 10 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 6.7s, OverallIterations: 3, TraceHistogramMax: 1, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 0.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 0 SdHoareTripleChecker+Valid, 0.1s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 0 mSDsluCounter, 19 SdHoareTripleChecker+Invalid, 0.1s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 7 mSDsCounter, 5 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 36 IncrementalHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 5 mSolverCounterUnsat, 12 mSDtfsCounter, 36 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 45 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 4.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=10occurred in iteration=0, InterpolantAutomatonStates: 13, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 3 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.8s InterpolantComputationTime, 34 NumberOfCodeBlocks, 34 NumberOfCodeBlocksAsserted, 5 NumberOfCheckSat, 41 ConstructedInterpolants, 0 QuantifiedInterpolants, 109 SizeOfPredicates, 1 NumberOfNonLiveVariables, 89 ConjunctsInSsa, 12 ConjunctsInUnsatCore, 7 InterpolantComputations, 2 PerfectInterpolantSequences, 1/6 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 1 specifications checked. All of them hold - InvariantResult [Line: 28]: Loop Invariant Derived loop invariant: (0 == ((j >= 0) ? (j % 2) : ((j % 2) + 2))) - InvariantResult [Line: 22]: Loop Invariant Derived loop invariant: ((((i >= 0) ? (i % 2) : ((i % 2) + 2)) == 0) && (0 == ((j >= 0) ? (j % 2) : ((j % 2) + 2)))) RESULT: Ultimate proved your program to be correct! [2024-11-14 02:56:06,256 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c7f0a8d-a9db-4df0-825a-7bac745910b9/bin/utaipan-verify-sOmjnqqW8E/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