./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.exit.2.prop1-back-serstep.c --full-output --architecture 64bit -------------------------------------------------------------------------------- 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_fd32d8f3-de8b-4e42-af1f-bf070827b4a3/bin/utaipan-verify-sOmjnqqW8E/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd32d8f3-de8b-4e42-af1f-bf070827b4a3/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_fd32d8f3-de8b-4e42-af1f-bf070827b4a3/bin/utaipan-verify-sOmjnqqW8E/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd32d8f3-de8b-4e42-af1f-bf070827b4a3/bin/utaipan-verify-sOmjnqqW8E/config/TaipanReach.xml -i ../../sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.exit.2.prop1-back-serstep.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd32d8f3-de8b-4e42-af1f-bf070827b4a3/bin/utaipan-verify-sOmjnqqW8E/config/svcomp-Reach-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd32d8f3-de8b-4e42-af1f-bf070827b4a3/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 64bit --witnessprinter.graph.data.programhash c316b66ab512a417d3e6f407311fc99481b8de7a909252597c2f6f14630599e2 --- Real Ultimate output --- This is Ultimate 0.3.0-dev-826ab2b [2024-11-13 23:48:00,447 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-13 23:48:00,538 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd32d8f3-de8b-4e42-af1f-bf070827b4a3/bin/utaipan-verify-sOmjnqqW8E/config/svcomp-Reach-64bit-Taipan_Default.epf [2024-11-13 23:48:00,545 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-13 23:48:00,546 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-13 23:48:00,580 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-13 23:48:00,581 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-13 23:48:00,581 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-13 23:48:00,581 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-13 23:48:00,582 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-13 23:48:00,582 INFO L153 SettingsManager]: * User list type=DISABLED [2024-11-13 23:48:00,582 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2024-11-13 23:48:00,582 INFO L153 SettingsManager]: * Explicit value domain=true [2024-11-13 23:48:00,582 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2024-11-13 23:48:00,582 INFO L153 SettingsManager]: * Octagon Domain=false [2024-11-13 23:48:00,582 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2024-11-13 23:48:00,582 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2024-11-13 23:48:00,582 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2024-11-13 23:48:00,582 INFO L153 SettingsManager]: * Interval Domain=false [2024-11-13 23:48:00,583 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2024-11-13 23:48:00,583 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2024-11-13 23:48:00,583 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2024-11-13 23:48:00,583 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-13 23:48:00,583 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-13 23:48:00,583 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-13 23:48:00,583 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-13 23:48:00,583 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-13 23:48:00,586 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-13 23:48:00,586 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-13 23:48:00,586 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-13 23:48:00,586 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-13 23:48:00,586 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-13 23:48:00,586 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-13 23:48:00,586 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-13 23:48:00,586 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-13 23:48:00,587 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2024-11-13 23:48:00,587 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-13 23:48:00,587 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-13 23:48:00,587 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-13 23:48:00,587 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2024-11-13 23:48:00,587 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-13 23:48:00,587 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-13 23:48:00,587 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2024-11-13 23:48:00,587 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-13 23:48:00,587 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_fd32d8f3-de8b-4e42-af1f-bf070827b4a3/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 -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c316b66ab512a417d3e6f407311fc99481b8de7a909252597c2f6f14630599e2 [2024-11-13 23:48:00,925 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-13 23:48:00,933 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-13 23:48:00,936 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-13 23:48:00,937 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-13 23:48:00,937 INFO L274 PluginConnector]: CDTParser initialized [2024-11-13 23:48:00,938 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd32d8f3-de8b-4e42-af1f-bf070827b4a3/bin/utaipan-verify-sOmjnqqW8E/../../sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.exit.2.prop1-back-serstep.c Unable to find full path for "g++" [2024-11-13 23:48:02,793 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-13 23:48:03,407 INFO L384 CDTParser]: Found 1 translation units. [2024-11-13 23:48:03,407 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd32d8f3-de8b-4e42-af1f-bf070827b4a3/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.exit.2.prop1-back-serstep.c [2024-11-13 23:48:03,454 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd32d8f3-de8b-4e42-af1f-bf070827b4a3/bin/utaipan-verify-sOmjnqqW8E/data/e4fde792e/a02b96f119564848aa3a4bce743688e0/FLAG7560af79e [2024-11-13 23:48:03,849 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd32d8f3-de8b-4e42-af1f-bf070827b4a3/bin/utaipan-verify-sOmjnqqW8E/data/e4fde792e/a02b96f119564848aa3a4bce743688e0 [2024-11-13 23:48:03,851 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-13 23:48:03,853 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-13 23:48:03,854 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-13 23:48:03,854 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-13 23:48:03,859 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-13 23:48:03,859 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.11 11:48:03" (1/1) ... [2024-11-13 23:48:03,860 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5f7041be and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 11:48:03, skipping insertion in model container [2024-11-13 23:48:03,861 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.11 11:48:03" (1/1) ... [2024-11-13 23:48:03,961 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-13 23:48:04,237 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_fd32d8f3-de8b-4e42-af1f-bf070827b4a3/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.exit.2.prop1-back-serstep.c[1172,1185] [2024-11-13 23:48:05,135 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-13 23:48:05,148 INFO L200 MainTranslator]: Completed pre-run [2024-11-13 23:48:05,162 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_fd32d8f3-de8b-4e42-af1f-bf070827b4a3/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.exit.2.prop1-back-serstep.c[1172,1185] [2024-11-13 23:48:05,829 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-13 23:48:05,844 INFO L204 MainTranslator]: Completed translation [2024-11-13 23:48:05,845 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 11:48:05 WrapperNode [2024-11-13 23:48:05,845 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-13 23:48:05,846 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-13 23:48:05,846 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-13 23:48:05,846 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-13 23:48:05,853 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 11:48:05" (1/1) ... [2024-11-13 23:48:06,026 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 11:48:05" (1/1) ... [2024-11-13 23:48:08,511 INFO L138 Inliner]: procedures = 17, calls = 8, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 16903 [2024-11-13 23:48:08,512 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-13 23:48:08,513 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-13 23:48:08,513 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-13 23:48:08,513 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-13 23:48:08,520 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 11:48:05" (1/1) ... [2024-11-13 23:48:08,520 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 11:48:05" (1/1) ... [2024-11-13 23:48:08,910 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 11:48:05" (1/1) ... [2024-11-13 23:48:08,911 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 11:48:05" (1/1) ... [2024-11-13 23:48:09,398 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 11:48:05" (1/1) ... [2024-11-13 23:48:09,501 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 11:48:05" (1/1) ... [2024-11-13 23:48:09,597 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 11:48:05" (1/1) ... [2024-11-13 23:48:09,669 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 11:48:05" (1/1) ... [2024-11-13 23:48:09,995 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-13 23:48:09,997 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-13 23:48:09,997 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-13 23:48:09,997 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-13 23:48:09,999 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 11:48:05" (1/1) ... [2024-11-13 23:48:10,008 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2024-11-13 23:48:10,023 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd32d8f3-de8b-4e42-af1f-bf070827b4a3/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-13 23:48:10,042 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd32d8f3-de8b-4e42-af1f-bf070827b4a3/bin/utaipan-verify-sOmjnqqW8E/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2024-11-13 23:48:10,283 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd32d8f3-de8b-4e42-af1f-bf070827b4a3/bin/utaipan-verify-sOmjnqqW8E/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2024-11-13 23:48:10,308 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-13 23:48:10,308 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2024-11-13 23:48:10,308 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-13 23:48:10,308 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-13 23:48:11,424 INFO L238 CfgBuilder]: Building ICFG [2024-11-13 23:48:11,427 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-13 23:48:51,533 INFO L? ?]: Removed 9525 outVars from TransFormulas that were not future-live. [2024-11-13 23:48:51,533 INFO L287 CfgBuilder]: Performing block encoding [2024-11-13 23:49:23,992 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-13 23:49:23,993 INFO L316 CfgBuilder]: Removed 1 assume(true) statements. [2024-11-13 23:49:23,993 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.11 11:49:23 BoogieIcfgContainer [2024-11-13 23:49:23,993 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-13 23:49:23,997 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-13 23:49:23,997 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-13 23:49:24,002 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-13 23:49:24,002 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.11 11:48:03" (1/3) ... [2024-11-13 23:49:24,003 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4e9819dc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.11 11:49:24, skipping insertion in model container [2024-11-13 23:49:24,003 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 11:48:05" (2/3) ... [2024-11-13 23:49:24,003 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4e9819dc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.11 11:49:24, skipping insertion in model container [2024-11-13 23:49:24,004 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.11 11:49:23" (3/3) ... [2024-11-13 23:49:24,005 INFO L112 eAbstractionObserver]: Analyzing ICFG btor2c-lazyMod.exit.2.prop1-back-serstep.c [2024-11-13 23:49:24,023 INFO L217 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-13 23:49:24,025 INFO L154 ceAbstractionStarter]: Applying trace abstraction to ICFG btor2c-lazyMod.exit.2.prop1-back-serstep.c that has 1 procedures, 7 locations, 1 initial locations, 1 loop locations, and 1 error locations. [2024-11-13 23:49:24,082 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-13 23:49:24,102 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;@2c0b95aa, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-13 23:49:24,103 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-11-13 23:49:24,107 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) [2024-11-13 23:49:24,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2024-11-13 23:49:24,114 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 23:49:24,115 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2024-11-13 23:49:24,116 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 23:49:24,121 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 23:49:24,122 INFO L85 PathProgramCache]: Analyzing trace with hash 824231040, now seen corresponding path program 1 times [2024-11-13 23:49:24,131 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-13 23:49:24,131 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [181548206] [2024-11-13 23:49:24,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 23:49:24,133 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 23:49:28,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat