./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/loop-acceleration/array_2-2-simple.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_db4b2500-3ca6-410b-94c1-f606caddba5e/bin/utaipan-verify-sOmjnqqW8E/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db4b2500-3ca6-410b-94c1-f606caddba5e/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_db4b2500-3ca6-410b-94c1-f606caddba5e/bin/utaipan-verify-sOmjnqqW8E/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db4b2500-3ca6-410b-94c1-f606caddba5e/bin/utaipan-verify-sOmjnqqW8E/config/TaipanReach.xml -i ../../sv-benchmarks/c/loop-acceleration/array_2-2-simple.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db4b2500-3ca6-410b-94c1-f606caddba5e/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_db4b2500-3ca6-410b-94c1-f606caddba5e/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 c189c1cb91ea61745da6126e2d9c114f6ae511079741dc75bc227de256009336 --- Real Ultimate output --- This is Ultimate 0.3.0-dev-826ab2b [2024-11-14 04:17:42,363 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-14 04:17:42,450 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db4b2500-3ca6-410b-94c1-f606caddba5e/bin/utaipan-verify-sOmjnqqW8E/config/svcomp-Reach-32bit-Taipan_Default.epf [2024-11-14 04:17:42,458 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-14 04:17:42,458 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-14 04:17:42,497 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-14 04:17:42,498 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-14 04:17:42,498 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-14 04:17:42,498 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-14 04:17:42,498 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-14 04:17:42,499 INFO L153 SettingsManager]: * User list type=DISABLED [2024-11-14 04:17:42,499 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2024-11-14 04:17:42,499 INFO L153 SettingsManager]: * Explicit value domain=true [2024-11-14 04:17:42,499 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2024-11-14 04:17:42,499 INFO L153 SettingsManager]: * Octagon Domain=false [2024-11-14 04:17:42,499 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2024-11-14 04:17:42,499 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2024-11-14 04:17:42,499 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2024-11-14 04:17:42,499 INFO L153 SettingsManager]: * Interval Domain=false [2024-11-14 04:17:42,500 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2024-11-14 04:17:42,500 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2024-11-14 04:17:42,500 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2024-11-14 04:17:42,500 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-14 04:17:42,500 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-14 04:17:42,500 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-14 04:17:42,501 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-14 04:17:42,501 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-14 04:17:42,501 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-14 04:17:42,501 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-14 04:17:42,502 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-14 04:17:42,502 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-14 04:17:42,503 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-14 04:17:42,503 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-14 04:17:42,503 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-14 04:17:42,503 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-14 04:17:42,503 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-14 04:17:42,503 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-14 04:17:42,503 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-14 04:17:42,504 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2024-11-14 04:17:42,504 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-14 04:17:42,504 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-14 04:17:42,504 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-14 04:17:42,504 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2024-11-14 04:17:42,504 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-14 04:17:42,504 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-14 04:17:42,504 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2024-11-14 04:17:42,505 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-14 04:17:42,505 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_db4b2500-3ca6-410b-94c1-f606caddba5e/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 -> c189c1cb91ea61745da6126e2d9c114f6ae511079741dc75bc227de256009336 [2024-11-14 04:17:42,822 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-14 04:17:42,836 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-14 04:17:42,838 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-14 04:17:42,839 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-14 04:17:42,840 INFO L274 PluginConnector]: CDTParser initialized [2024-11-14 04:17:42,841 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db4b2500-3ca6-410b-94c1-f606caddba5e/bin/utaipan-verify-sOmjnqqW8E/../../sv-benchmarks/c/loop-acceleration/array_2-2-simple.i Unable to find full path for "g++" [2024-11-14 04:17:44,814 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-14 04:17:45,132 INFO L384 CDTParser]: Found 1 translation units. [2024-11-14 04:17:45,134 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db4b2500-3ca6-410b-94c1-f606caddba5e/sv-benchmarks/c/loop-acceleration/array_2-2-simple.i [2024-11-14 04:17:45,140 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db4b2500-3ca6-410b-94c1-f606caddba5e/bin/utaipan-verify-sOmjnqqW8E/data/92cdf674f/86bcd819fb3645629a3cb8bcead18fba/FLAG783e79be3 [2024-11-14 04:17:45,154 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db4b2500-3ca6-410b-94c1-f606caddba5e/bin/utaipan-verify-sOmjnqqW8E/data/92cdf674f/86bcd819fb3645629a3cb8bcead18fba [2024-11-14 04:17:45,157 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-14 04:17:45,158 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-14 04:17:45,159 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-14 04:17:45,160 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-14 04:17:45,164 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-14 04:17:45,165 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.11 04:17:45" (1/1) ... [2024-11-14 04:17:45,166 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1358cc2d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 04:17:45, skipping insertion in model container [2024-11-14 04:17:45,166 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.11 04:17:45" (1/1) ... [2024-11-14 04:17:45,181 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-14 04:17:45,357 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_db4b2500-3ca6-410b-94c1-f606caddba5e/sv-benchmarks/c/loop-acceleration/array_2-2-simple.i[809,822] [2024-11-14 04:17:45,512 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-14 04:17:45,530 INFO L200 MainTranslator]: Completed pre-run [2024-11-14 04:17:45,540 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_db4b2500-3ca6-410b-94c1-f606caddba5e/sv-benchmarks/c/loop-acceleration/array_2-2-simple.i[809,822] [2024-11-14 04:17:45,724 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-14 04:17:45,741 INFO L204 MainTranslator]: Completed translation [2024-11-14 04:17:45,742 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 04:17:45 WrapperNode [2024-11-14 04:17:45,742 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-14 04:17:45,743 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-14 04:17:45,743 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-14 04:17:45,744 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-14 04:17:45,751 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 04:17:45" (1/1) ... [2024-11-14 04:17:45,819 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 04:17:45" (1/1) ... [2024-11-14 04:17:46,077 INFO L138 Inliner]: procedures = 15, calls = 4111, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 4134 [2024-11-14 04:17:46,078 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-14 04:17:46,078 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-14 04:17:46,078 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-14 04:17:46,080 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-14 04:17:46,091 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 04:17:45" (1/1) ... [2024-11-14 04:17:46,091 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 04:17:45" (1/1) ... [2024-11-14 04:17:46,119 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 04:17:45" (1/1) ... [2024-11-14 04:17:46,119 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 04:17:45" (1/1) ... [2024-11-14 04:17:46,304 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 04:17:45" (1/1) ... [2024-11-14 04:17:46,315 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 04:17:45" (1/1) ... [2024-11-14 04:17:46,333 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 04:17:45" (1/1) ... [2024-11-14 04:17:46,347 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 04:17:45" (1/1) ... [2024-11-14 04:17:46,366 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-14 04:17:46,368 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-14 04:17:46,368 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-14 04:17:46,368 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-14 04:17:46,369 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 04:17:45" (1/1) ... [2024-11-14 04:17:46,376 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2024-11-14 04:17:46,389 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db4b2500-3ca6-410b-94c1-f606caddba5e/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 04:17:46,403 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db4b2500-3ca6-410b-94c1-f606caddba5e/bin/utaipan-verify-sOmjnqqW8E/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2024-11-14 04:17:46,406 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db4b2500-3ca6-410b-94c1-f606caddba5e/bin/utaipan-verify-sOmjnqqW8E/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2024-11-14 04:17:46,432 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-14 04:17:46,433 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2024-11-14 04:17:46,433 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-11-14 04:17:46,433 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2024-11-14 04:17:46,433 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-14 04:17:46,433 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-14 04:17:46,433 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2024-11-14 04:17:46,433 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-11-14 04:17:46,509 INFO L238 CfgBuilder]: Building ICFG [2024-11-14 04:17:46,512 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-14 04:17:52,461 INFO L? ?]: Removed 11 outVars from TransFormulas that were not future-live. [2024-11-14 04:17:52,462 INFO L287 CfgBuilder]: Performing block encoding [2024-11-14 04:17:52,816 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-14 04:17:52,817 INFO L316 CfgBuilder]: Removed 1 assume(true) statements. [2024-11-14 04:17:52,817 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.11 04:17:52 BoogieIcfgContainer [2024-11-14 04:17:52,817 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-14 04:17:52,822 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-14 04:17:52,822 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-14 04:17:52,830 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-14 04:17:52,830 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.11 04:17:45" (1/3) ... [2024-11-14 04:17:52,831 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1fccddaf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.11 04:17:52, skipping insertion in model container [2024-11-14 04:17:52,831 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 04:17:45" (2/3) ... [2024-11-14 04:17:52,831 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1fccddaf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.11 04:17:52, skipping insertion in model container [2024-11-14 04:17:52,831 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.11 04:17:52" (3/3) ... [2024-11-14 04:17:52,832 INFO L112 eAbstractionObserver]: Analyzing ICFG array_2-2-simple.i [2024-11-14 04:17:52,851 INFO L217 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-14 04:17:52,853 INFO L154 ceAbstractionStarter]: Applying trace abstraction to ICFG array_2-2-simple.i that has 1 procedures, 7 locations, 1 initial locations, 1 loop locations, and 1 error locations. [2024-11-14 04:17:52,917 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-14 04:17:52,933 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;@7ac3d53, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-14 04:17:52,934 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-11-14 04:17:52,938 INFO L276 IsEmpty]: Start isEmpty. Operand has 7 states, 5 states have (on average 1.6) internal successors, (8), 6 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 04:17:52,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2024-11-14 04:17:52,944 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:17:52,945 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2024-11-14 04:17:52,945 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 04:17:52,951 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:17:52,952 INFO L85 PathProgramCache]: Analyzing trace with hash 1849510, now seen corresponding path program 1 times [2024-11-14 04:17:52,961 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:17:52,962 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1491782311] [2024-11-14 04:17:52,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:17:52,964 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:17:53,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:17:54,909 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 04:17:54,912 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:17:54,913 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1491782311] [2024-11-14 04:17:54,913 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1491782311] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 04:17:54,913 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-14 04:17:54,914 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-14 04:17:54,915 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1342273663] [2024-11-14 04:17:54,915 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 04:17:54,922 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-14 04:17:54,922 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 04:17:54,945 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-14 04:17:54,946 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-14 04:17:54,948 INFO L87 Difference]: Start difference. First operand has 7 states, 5 states have (on average 1.6) internal successors, (8), 6 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) Second operand has 3 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:17:55,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:17:55,223 INFO L93 Difference]: Finished difference Result 13 states and 15 transitions. [2024-11-14 04:17:55,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-14 04:17:55,229 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 4 [2024-11-14 04:17:55,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:17:55,235 INFO L225 Difference]: With dead ends: 13 [2024-11-14 04:17:55,235 INFO L226 Difference]: Without dead ends: 6 [2024-11-14 04:17:55,238 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-14 04:17:55,245 INFO L432 NwaCegarLoop]: 3 mSDtfsCounter, 0 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-14 04:17:55,245 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 6 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-14 04:17:55,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6 states. [2024-11-14 04:17:55,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6 to 6. [2024-11-14 04:17:55,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6 states, 5 states have (on average 1.2) internal successors, (6), 5 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:17:55,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 6 transitions. [2024-11-14 04:17:55,275 INFO L78 Accepts]: Start accepts. Automaton has 6 states and 6 transitions. Word has length 4 [2024-11-14 04:17:55,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:17:55,276 INFO L471 AbstractCegarLoop]: Abstraction has 6 states and 6 transitions. [2024-11-14 04:17:55,277 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:17:55,277 INFO L276 IsEmpty]: Start isEmpty. Operand 6 states and 6 transitions. [2024-11-14 04:17:55,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2024-11-14 04:17:55,277 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:17:55,277 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2024-11-14 04:17:55,278 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-14 04:17:55,278 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 04:17:55,278 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:17:55,279 INFO L85 PathProgramCache]: Analyzing trace with hash 56664950, now seen corresponding path program 1 times [2024-11-14 04:17:55,279 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:17:55,279 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [384645149] [2024-11-14 04:17:55,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:17:55,280 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:17:55,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:17:56,501 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 04:17:56,502 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:17:56,503 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [384645149] [2024-11-14 04:17:56,503 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [384645149] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 04:17:56,503 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [475329290] [2024-11-14 04:17:56,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:17:56,503 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:17:56,503 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db4b2500-3ca6-410b-94c1-f606caddba5e/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 04:17:56,507 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db4b2500-3ca6-410b-94c1-f606caddba5e/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 04:17:56,509 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db4b2500-3ca6-410b-94c1-f606caddba5e/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-14 04:17:58,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:17:58,473 INFO L255 TraceCheckSpWp]: Trace formula consists of 8248 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-11-14 04:17:58,482 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 04:17:58,530 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 04:17:58,530 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 04:17:58,558 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 04:17:58,559 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [475329290] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 04:17:58,559 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1960788515] [2024-11-14 04:17:58,581 INFO L159 IcfgInterpreter]: Started Sifa with 5 locations of interest [2024-11-14 04:17:58,581 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 04:17:58,585 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 04:17:58,591 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 04:17:58,591 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 04:29:43,345 WARN L286 SmtUtils]: Spent 1.37m on a formula simplification that was a NOOP. DAG size: 18505 (called from [L 210] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.BasicPredicateFactory.xJunctTerm) [2024-11-14 04:31:01,651 WARN L286 SmtUtils]: Spent 1.30m on a formula simplification that was a NOOP. DAG size: 18505 (called from [L 210] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.BasicPredicateFactory.xJunctTerm) [2024-11-14 04:33:07,540 WARN L286 SmtUtils]: Spent 2.10m on a formula simplification. DAG size of input: 18509 DAG size of output: 18505 (called from [L 210] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.BasicPredicateFactory.xJunctTerm)