./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/eca-rers2012/Problem16_label27.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_d4f036f7-be62-4004-a729-64ee4e5823b5/bin/utaipan-verify-sOmjnqqW8E/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4f036f7-be62-4004-a729-64ee4e5823b5/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_d4f036f7-be62-4004-a729-64ee4e5823b5/bin/utaipan-verify-sOmjnqqW8E/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4f036f7-be62-4004-a729-64ee4e5823b5/bin/utaipan-verify-sOmjnqqW8E/config/TaipanReach.xml -i ../../sv-benchmarks/c/eca-rers2012/Problem16_label27.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4f036f7-be62-4004-a729-64ee4e5823b5/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_d4f036f7-be62-4004-a729-64ee4e5823b5/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 b8b419a7bad122135c5018a0fcde1c414772cf931d8588f0cdb1172e002f61ab --- Real Ultimate output --- This is Ultimate 0.3.0-dev-826ab2b [2024-11-14 04:45:56,450 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-14 04:45:56,528 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4f036f7-be62-4004-a729-64ee4e5823b5/bin/utaipan-verify-sOmjnqqW8E/config/svcomp-Reach-32bit-Taipan_Default.epf [2024-11-14 04:45:56,535 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-14 04:45:56,535 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-14 04:45:56,566 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-14 04:45:56,567 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-14 04:45:56,567 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-14 04:45:56,568 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-14 04:45:56,568 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-14 04:45:56,568 INFO L153 SettingsManager]: * User list type=DISABLED [2024-11-14 04:45:56,569 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2024-11-14 04:45:56,569 INFO L153 SettingsManager]: * Explicit value domain=true [2024-11-14 04:45:56,569 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2024-11-14 04:45:56,569 INFO L153 SettingsManager]: * Octagon Domain=false [2024-11-14 04:45:56,569 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2024-11-14 04:45:56,570 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2024-11-14 04:45:56,570 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2024-11-14 04:45:56,570 INFO L153 SettingsManager]: * Interval Domain=false [2024-11-14 04:45:56,570 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2024-11-14 04:45:56,571 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2024-11-14 04:45:56,571 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2024-11-14 04:45:56,571 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-14 04:45:56,571 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-14 04:45:56,572 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-14 04:45:56,572 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-14 04:45:56,572 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-14 04:45:56,572 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-14 04:45:56,572 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-14 04:45:56,573 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-14 04:45:56,573 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-14 04:45:56,573 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-14 04:45:56,573 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-14 04:45:56,573 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-14 04:45:56,573 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-14 04:45:56,574 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-14 04:45:56,574 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-14 04:45:56,574 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-14 04:45:56,574 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2024-11-14 04:45:56,574 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-14 04:45:56,575 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-14 04:45:56,575 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-14 04:45:56,575 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2024-11-14 04:45:56,575 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-14 04:45:56,575 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-14 04:45:56,575 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2024-11-14 04:45:56,575 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-14 04:45:56,576 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_d4f036f7-be62-4004-a729-64ee4e5823b5/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 -> b8b419a7bad122135c5018a0fcde1c414772cf931d8588f0cdb1172e002f61ab [2024-11-14 04:45:56,999 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-14 04:45:57,010 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-14 04:45:57,013 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-14 04:45:57,015 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-14 04:45:57,016 INFO L274 PluginConnector]: CDTParser initialized [2024-11-14 04:45:57,017 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4f036f7-be62-4004-a729-64ee4e5823b5/bin/utaipan-verify-sOmjnqqW8E/../../sv-benchmarks/c/eca-rers2012/Problem16_label27.c Unable to find full path for "g++" [2024-11-14 04:45:59,543 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-14 04:46:00,074 INFO L384 CDTParser]: Found 1 translation units. [2024-11-14 04:46:00,075 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4f036f7-be62-4004-a729-64ee4e5823b5/sv-benchmarks/c/eca-rers2012/Problem16_label27.c [2024-11-14 04:46:00,108 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4f036f7-be62-4004-a729-64ee4e5823b5/bin/utaipan-verify-sOmjnqqW8E/data/9b86dd75a/1ed728aaaac148b6929c9693e8af000d/FLAG4eb493bda [2024-11-14 04:46:00,139 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4f036f7-be62-4004-a729-64ee4e5823b5/bin/utaipan-verify-sOmjnqqW8E/data/9b86dd75a/1ed728aaaac148b6929c9693e8af000d [2024-11-14 04:46:00,142 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-14 04:46:00,144 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-14 04:46:00,147 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-14 04:46:00,150 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-14 04:46:00,156 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-14 04:46:00,157 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.11 04:46:00" (1/1) ... [2024-11-14 04:46:00,159 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@24121a0d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 04:46:00, skipping insertion in model container [2024-11-14 04:46:00,162 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.11 04:46:00" (1/1) ... [2024-11-14 04:46:00,269 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-14 04:46:00,540 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_d4f036f7-be62-4004-a729-64ee4e5823b5/sv-benchmarks/c/eca-rers2012/Problem16_label27.c[1550,1563] [2024-11-14 04:46:01,208 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-14 04:46:01,218 INFO L200 MainTranslator]: Completed pre-run [2024-11-14 04:46:01,234 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_d4f036f7-be62-4004-a729-64ee4e5823b5/sv-benchmarks/c/eca-rers2012/Problem16_label27.c[1550,1563] [2024-11-14 04:46:01,564 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-14 04:46:01,596 INFO L204 MainTranslator]: Completed translation [2024-11-14 04:46:01,596 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 04:46:01 WrapperNode [2024-11-14 04:46:01,597 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-14 04:46:01,598 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-14 04:46:01,598 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-14 04:46:01,599 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-14 04:46:01,607 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 04:46:01" (1/1) ... [2024-11-14 04:46:01,656 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 04:46:01" (1/1) ... [2024-11-14 04:46:01,901 INFO L138 Inliner]: procedures = 15, calls = 9, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 1769 [2024-11-14 04:46:01,901 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-14 04:46:01,903 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-14 04:46:01,903 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-14 04:46:01,904 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-14 04:46:01,913 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 04:46:01" (1/1) ... [2024-11-14 04:46:01,913 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 04:46:01" (1/1) ... [2024-11-14 04:46:01,953 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 04:46:01" (1/1) ... [2024-11-14 04:46:01,953 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 04:46:01" (1/1) ... [2024-11-14 04:46:02,047 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 04:46:01" (1/1) ... [2024-11-14 04:46:02,062 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 04:46:01" (1/1) ... [2024-11-14 04:46:02,083 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 04:46:01" (1/1) ... [2024-11-14 04:46:02,094 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 04:46:01" (1/1) ... [2024-11-14 04:46:02,124 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-14 04:46:02,126 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-14 04:46:02,128 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-14 04:46:02,128 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-14 04:46:02,129 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 04:46:01" (1/1) ... [2024-11-14 04:46:02,144 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2024-11-14 04:46:02,165 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4f036f7-be62-4004-a729-64ee4e5823b5/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 04:46:02,184 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4f036f7-be62-4004-a729-64ee4e5823b5/bin/utaipan-verify-sOmjnqqW8E/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2024-11-14 04:46:02,188 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4f036f7-be62-4004-a729-64ee4e5823b5/bin/utaipan-verify-sOmjnqqW8E/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2024-11-14 04:46:02,223 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-14 04:46:02,223 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2024-11-14 04:46:02,224 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-14 04:46:02,224 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-14 04:46:02,334 INFO L238 CfgBuilder]: Building ICFG [2024-11-14 04:46:02,337 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-14 04:46:06,163 INFO L? ?]: Removed 276 outVars from TransFormulas that were not future-live. [2024-11-14 04:46:06,163 INFO L287 CfgBuilder]: Performing block encoding [2024-11-14 04:46:26,724 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-14 04:46:26,724 INFO L316 CfgBuilder]: Removed 1 assume(true) statements. [2024-11-14 04:46:26,725 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.11 04:46:26 BoogieIcfgContainer [2024-11-14 04:46:26,725 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-14 04:46:26,728 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-14 04:46:26,728 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-14 04:46:26,735 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-14 04:46:26,736 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.11 04:46:00" (1/3) ... [2024-11-14 04:46:26,736 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@321e3993 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.11 04:46:26, skipping insertion in model container [2024-11-14 04:46:26,737 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 04:46:01" (2/3) ... [2024-11-14 04:46:26,737 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@321e3993 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.11 04:46:26, skipping insertion in model container [2024-11-14 04:46:26,737 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.11 04:46:26" (3/3) ... [2024-11-14 04:46:26,739 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem16_label27.c [2024-11-14 04:46:26,763 INFO L217 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-14 04:46:26,765 INFO L154 ceAbstractionStarter]: Applying trace abstraction to ICFG Problem16_label27.c that has 1 procedures, 9 locations, 1 initial locations, 1 loop locations, and 1 error locations. [2024-11-14 04:46:26,852 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-14 04:46:26,882 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;@d3f13a1, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-14 04:46:26,882 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-11-14 04:46:26,891 INFO L276 IsEmpty]: Start isEmpty. Operand has 9 states, 7 states have (on average 1.5714285714285714) 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 04:46:26,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2024-11-14 04:46:26,901 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:46:26,902 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2024-11-14 04:46:26,903 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 04:46:26,913 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:46:26,914 INFO L85 PathProgramCache]: Analyzing trace with hash 1751373681, now seen corresponding path program 1 times [2024-11-14 04:46:26,927 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:46:26,928 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [769589625] [2024-11-14 04:46:26,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:46:26,930 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:46:27,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:46:27,266 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 04:46:27,267 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:46:27,267 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [769589625] [2024-11-14 04:46:27,268 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [769589625] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 04:46:27,268 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-14 04:46:27,268 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-14 04:46:27,270 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [69113258] [2024-11-14 04:46:27,271 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 04:46:27,276 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-14 04:46:27,277 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 04:46:27,307 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-14 04:46:27,309 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-14 04:46:27,312 INFO L87 Difference]: Start difference. First operand has 9 states, 7 states have (on average 1.5714285714285714) 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) Second operand has 3 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 2 states have internal predecessors, (5), 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 04:46:27,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:46:27,543 INFO L93 Difference]: Finished difference Result 23 states and 29 transitions. [2024-11-14 04:46:27,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-14 04:46:27,553 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 2 states have internal predecessors, (5), 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 5 [2024-11-14 04:46:27,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:46:27,563 INFO L225 Difference]: With dead ends: 23 [2024-11-14 04:46:27,563 INFO L226 Difference]: Without dead ends: 11 [2024-11-14 04:46:27,569 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 04:46:27,576 INFO L432 NwaCegarLoop]: 4 mSDtfsCounter, 3 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 7 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-14 04:46:27,579 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 7 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-14 04:46:27,600 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2024-11-14 04:46:27,614 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 10. [2024-11-14 04:46:27,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10 states, 9 states have (on average 1.1111111111111112) internal successors, (10), 9 states have internal predecessors, (10), 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 04:46:27,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 10 transitions. [2024-11-14 04:46:27,628 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 10 transitions. Word has length 5 [2024-11-14 04:46:27,629 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:46:27,629 INFO L471 AbstractCegarLoop]: Abstraction has 10 states and 10 transitions. [2024-11-14 04:46:27,629 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 2 states have internal predecessors, (5), 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 04:46:27,629 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 10 transitions. [2024-11-14 04:46:27,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2024-11-14 04:46:27,630 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:46:27,630 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1] [2024-11-14 04:46:27,633 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-14 04:46:27,633 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 04:46:27,634 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:46:27,634 INFO L85 PathProgramCache]: Analyzing trace with hash -337883068, now seen corresponding path program 1 times [2024-11-14 04:46:27,634 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:46:27,634 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1420850954] [2024-11-14 04:46:27,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:46:27,637 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:46:28,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat