./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/unsignedintegeroverflow-sas23/bilinear_interpolation.i --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_cd906a17-8127-41b2-8626-ad15eb29c50b/bin/utaipan-verify-sOmjnqqW8E/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd906a17-8127-41b2-8626-ad15eb29c50b/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_cd906a17-8127-41b2-8626-ad15eb29c50b/bin/utaipan-verify-sOmjnqqW8E/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd906a17-8127-41b2-8626-ad15eb29c50b/bin/utaipan-verify-sOmjnqqW8E/config/TaipanReach.xml -i ../../sv-benchmarks/c/unsignedintegeroverflow-sas23/bilinear_interpolation.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd906a17-8127-41b2-8626-ad15eb29c50b/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_cd906a17-8127-41b2-8626-ad15eb29c50b/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 2ab4edcca5b9462828f3f8508070d4176bb26ab0f9320b15e5816d52ba5f91eb --- Real Ultimate output --- This is Ultimate 0.3.0-dev-826ab2b [2024-11-14 03:36:45,180 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-14 03:36:45,275 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd906a17-8127-41b2-8626-ad15eb29c50b/bin/utaipan-verify-sOmjnqqW8E/config/svcomp-Reach-32bit-Taipan_Default.epf [2024-11-14 03:36:45,283 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-14 03:36:45,283 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-14 03:36:45,317 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-14 03:36:45,318 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-14 03:36:45,318 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-14 03:36:45,319 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-14 03:36:45,319 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-14 03:36:45,319 INFO L153 SettingsManager]: * User list type=DISABLED [2024-11-14 03:36:45,319 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2024-11-14 03:36:45,319 INFO L153 SettingsManager]: * Explicit value domain=true [2024-11-14 03:36:45,319 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2024-11-14 03:36:45,319 INFO L153 SettingsManager]: * Octagon Domain=false [2024-11-14 03:36:45,321 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2024-11-14 03:36:45,322 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2024-11-14 03:36:45,322 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2024-11-14 03:36:45,322 INFO L153 SettingsManager]: * Interval Domain=false [2024-11-14 03:36:45,324 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2024-11-14 03:36:45,324 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2024-11-14 03:36:45,324 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2024-11-14 03:36:45,324 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-14 03:36:45,325 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-14 03:36:45,325 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-14 03:36:45,325 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-14 03:36:45,326 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-14 03:36:45,326 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-14 03:36:45,326 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-14 03:36:45,326 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-14 03:36:45,326 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-14 03:36:45,326 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-14 03:36:45,327 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-14 03:36:45,327 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-14 03:36:45,327 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-14 03:36:45,327 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-14 03:36:45,327 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-14 03:36:45,327 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-14 03:36:45,327 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2024-11-14 03:36:45,328 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-14 03:36:45,329 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-14 03:36:45,329 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-14 03:36:45,329 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2024-11-14 03:36:45,329 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-14 03:36:45,329 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-14 03:36:45,329 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2024-11-14 03:36:45,329 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-14 03:36:45,329 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_cd906a17-8127-41b2-8626-ad15eb29c50b/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 -> 2ab4edcca5b9462828f3f8508070d4176bb26ab0f9320b15e5816d52ba5f91eb [2024-11-14 03:36:45,658 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-14 03:36:45,670 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-14 03:36:45,673 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-14 03:36:45,675 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-14 03:36:45,676 INFO L274 PluginConnector]: CDTParser initialized [2024-11-14 03:36:45,677 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd906a17-8127-41b2-8626-ad15eb29c50b/bin/utaipan-verify-sOmjnqqW8E/../../sv-benchmarks/c/unsignedintegeroverflow-sas23/bilinear_interpolation.i Unable to find full path for "g++" [2024-11-14 03:36:47,758 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-14 03:36:48,007 INFO L384 CDTParser]: Found 1 translation units. [2024-11-14 03:36:48,008 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd906a17-8127-41b2-8626-ad15eb29c50b/sv-benchmarks/c/unsignedintegeroverflow-sas23/bilinear_interpolation.i [2024-11-14 03:36:48,016 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd906a17-8127-41b2-8626-ad15eb29c50b/bin/utaipan-verify-sOmjnqqW8E/data/d5604204a/6dd8b473702546f8b053980e6be33e2f/FLAG73f544c00 [2024-11-14 03:36:48,339 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd906a17-8127-41b2-8626-ad15eb29c50b/bin/utaipan-verify-sOmjnqqW8E/data/d5604204a/6dd8b473702546f8b053980e6be33e2f [2024-11-14 03:36:48,341 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-14 03:36:48,343 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-14 03:36:48,344 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-14 03:36:48,344 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-14 03:36:48,349 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-14 03:36:48,350 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.11 03:36:48" (1/1) ... [2024-11-14 03:36:48,350 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@805677 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 03:36:48, skipping insertion in model container [2024-11-14 03:36:48,351 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.11 03:36:48" (1/1) ... [2024-11-14 03:36:48,371 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-14 03:36:48,552 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_cd906a17-8127-41b2-8626-ad15eb29c50b/sv-benchmarks/c/unsignedintegeroverflow-sas23/bilinear_interpolation.i[1053,1066] [2024-11-14 03:36:48,585 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-14 03:36:48,598 INFO L200 MainTranslator]: Completed pre-run [2024-11-14 03:36:48,609 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_cd906a17-8127-41b2-8626-ad15eb29c50b/sv-benchmarks/c/unsignedintegeroverflow-sas23/bilinear_interpolation.i[1053,1066] [2024-11-14 03:36:48,623 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-14 03:36:48,638 INFO L204 MainTranslator]: Completed translation [2024-11-14 03:36:48,638 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 03:36:48 WrapperNode [2024-11-14 03:36:48,639 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-14 03:36:48,640 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-14 03:36:48,640 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-14 03:36:48,640 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-14 03:36:48,648 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 03:36:48" (1/1) ... [2024-11-14 03:36:48,655 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 03:36:48" (1/1) ... [2024-11-14 03:36:48,677 INFO L138 Inliner]: procedures = 15, calls = 7, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 59 [2024-11-14 03:36:48,678 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-14 03:36:48,679 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-14 03:36:48,679 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-14 03:36:48,679 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-14 03:36:48,686 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 03:36:48" (1/1) ... [2024-11-14 03:36:48,686 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 03:36:48" (1/1) ... [2024-11-14 03:36:48,688 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 03:36:48" (1/1) ... [2024-11-14 03:36:48,688 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 03:36:48" (1/1) ... [2024-11-14 03:36:48,692 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 03:36:48" (1/1) ... [2024-11-14 03:36:48,694 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 03:36:48" (1/1) ... [2024-11-14 03:36:48,695 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 03:36:48" (1/1) ... [2024-11-14 03:36:48,696 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 03:36:48" (1/1) ... [2024-11-14 03:36:48,698 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-14 03:36:48,699 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-14 03:36:48,699 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-14 03:36:48,699 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-14 03:36:48,700 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 03:36:48" (1/1) ... [2024-11-14 03:36:48,707 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2024-11-14 03:36:48,728 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd906a17-8127-41b2-8626-ad15eb29c50b/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 03:36:48,743 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd906a17-8127-41b2-8626-ad15eb29c50b/bin/utaipan-verify-sOmjnqqW8E/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2024-11-14 03:36:48,750 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd906a17-8127-41b2-8626-ad15eb29c50b/bin/utaipan-verify-sOmjnqqW8E/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2024-11-14 03:36:48,778 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-14 03:36:48,779 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2024-11-14 03:36:48,779 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-14 03:36:48,779 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-14 03:36:48,869 INFO L238 CfgBuilder]: Building ICFG [2024-11-14 03:36:48,873 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-14 03:36:49,209 INFO L? ?]: Removed 16 outVars from TransFormulas that were not future-live. [2024-11-14 03:36:49,209 INFO L287 CfgBuilder]: Performing block encoding [2024-11-14 03:36:49,367 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-14 03:36:49,367 INFO L316 CfgBuilder]: Removed 0 assume(true) statements. [2024-11-14 03:36:49,367 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.11 03:36:49 BoogieIcfgContainer [2024-11-14 03:36:49,368 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-14 03:36:49,372 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-14 03:36:49,372 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-14 03:36:49,378 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-14 03:36:49,378 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.11 03:36:48" (1/3) ... [2024-11-14 03:36:49,379 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@402150f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.11 03:36:49, skipping insertion in model container [2024-11-14 03:36:49,379 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 03:36:48" (2/3) ... [2024-11-14 03:36:49,379 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@402150f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.11 03:36:49, skipping insertion in model container [2024-11-14 03:36:49,379 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.11 03:36:49" (3/3) ... [2024-11-14 03:36:49,381 INFO L112 eAbstractionObserver]: Analyzing ICFG bilinear_interpolation.i [2024-11-14 03:36:49,395 INFO L217 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-14 03:36:49,396 INFO L154 ceAbstractionStarter]: Applying trace abstraction to ICFG bilinear_interpolation.i that has 1 procedures, 6 locations, 1 initial locations, 0 loop locations, and 1 error locations. [2024-11-14 03:36:49,457 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-14 03:36:49,476 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;@233aa726, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-14 03:36:49,476 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-11-14 03:36:49,482 INFO L276 IsEmpty]: Start isEmpty. Operand has 6 states, 4 states have (on average 1.5) internal successors, (6), 5 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 03:36:49,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2024-11-14 03:36:49,490 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:36:49,490 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1] [2024-11-14 03:36:49,491 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 03:36:49,496 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:36:49,497 INFO L85 PathProgramCache]: Analyzing trace with hash 57085, now seen corresponding path program 1 times [2024-11-14 03:36:49,506 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:36:49,506 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2120646643] [2024-11-14 03:36:49,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:36:49,508 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:36:49,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-14 03:36:49,874 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [865697317] [2024-11-14 03:36:49,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:36:49,879 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:36:49,879 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd906a17-8127-41b2-8626-ad15eb29c50b/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 03:36:49,883 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd906a17-8127-41b2-8626-ad15eb29c50b/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 03:36:49,886 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd906a17-8127-41b2-8626-ad15eb29c50b/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process