./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/nla-digbench-scaling/bresenham-ll_unwindbound5.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_4d0c78b7-0b89-457e-9d25-69d735257d43/bin/utaipan-verify-sOmjnqqW8E/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d0c78b7-0b89-457e-9d25-69d735257d43/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_4d0c78b7-0b89-457e-9d25-69d735257d43/bin/utaipan-verify-sOmjnqqW8E/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d0c78b7-0b89-457e-9d25-69d735257d43/bin/utaipan-verify-sOmjnqqW8E/config/TaipanReach.xml -i ../../sv-benchmarks/c/nla-digbench-scaling/bresenham-ll_unwindbound5.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d0c78b7-0b89-457e-9d25-69d735257d43/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_4d0c78b7-0b89-457e-9d25-69d735257d43/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 7f61497696f0e412e267c342267f07f29bf3ce290f707b3aa1a4f0ac00ff0274 --- Real Ultimate output --- This is Ultimate 0.3.0-dev-826ab2b [2024-11-14 05:04:22,741 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-14 05:04:22,820 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d0c78b7-0b89-457e-9d25-69d735257d43/bin/utaipan-verify-sOmjnqqW8E/config/svcomp-Reach-32bit-Taipan_Default.epf [2024-11-14 05:04:22,829 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-14 05:04:22,830 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-14 05:04:22,855 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-14 05:04:22,856 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-14 05:04:22,856 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-14 05:04:22,857 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-14 05:04:22,857 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-14 05:04:22,857 INFO L153 SettingsManager]: * User list type=DISABLED [2024-11-14 05:04:22,857 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2024-11-14 05:04:22,857 INFO L153 SettingsManager]: * Explicit value domain=true [2024-11-14 05:04:22,858 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2024-11-14 05:04:22,858 INFO L153 SettingsManager]: * Octagon Domain=false [2024-11-14 05:04:22,858 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2024-11-14 05:04:22,858 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2024-11-14 05:04:22,858 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2024-11-14 05:04:22,859 INFO L153 SettingsManager]: * Interval Domain=false [2024-11-14 05:04:22,859 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2024-11-14 05:04:22,859 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2024-11-14 05:04:22,859 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2024-11-14 05:04:22,860 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-14 05:04:22,860 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-14 05:04:22,860 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-14 05:04:22,860 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-14 05:04:22,860 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-14 05:04:22,860 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-14 05:04:22,861 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-14 05:04:22,861 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-14 05:04:22,861 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-14 05:04:22,861 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-14 05:04:22,861 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-14 05:04:22,861 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-14 05:04:22,861 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-14 05:04:22,862 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-14 05:04:22,862 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-14 05:04:22,862 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-14 05:04:22,862 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2024-11-14 05:04:22,862 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-14 05:04:22,862 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-14 05:04:22,862 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-14 05:04:22,862 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2024-11-14 05:04:22,863 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-14 05:04:22,863 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-14 05:04:22,863 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2024-11-14 05:04:22,863 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-14 05:04:22,863 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_4d0c78b7-0b89-457e-9d25-69d735257d43/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 -> 7f61497696f0e412e267c342267f07f29bf3ce290f707b3aa1a4f0ac00ff0274 [2024-11-14 05:04:23,225 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-14 05:04:23,241 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-14 05:04:23,244 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-14 05:04:23,246 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-14 05:04:23,246 INFO L274 PluginConnector]: CDTParser initialized [2024-11-14 05:04:23,250 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d0c78b7-0b89-457e-9d25-69d735257d43/bin/utaipan-verify-sOmjnqqW8E/../../sv-benchmarks/c/nla-digbench-scaling/bresenham-ll_unwindbound5.c Unable to find full path for "g++" [2024-11-14 05:04:25,566 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-14 05:04:25,879 INFO L384 CDTParser]: Found 1 translation units. [2024-11-14 05:04:25,880 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d0c78b7-0b89-457e-9d25-69d735257d43/sv-benchmarks/c/nla-digbench-scaling/bresenham-ll_unwindbound5.c [2024-11-14 05:04:25,889 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d0c78b7-0b89-457e-9d25-69d735257d43/bin/utaipan-verify-sOmjnqqW8E/data/42794f624/fa05048cca974d908d3155e1d8d570cd/FLAG1b02b9b21 [2024-11-14 05:04:25,908 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d0c78b7-0b89-457e-9d25-69d735257d43/bin/utaipan-verify-sOmjnqqW8E/data/42794f624/fa05048cca974d908d3155e1d8d570cd [2024-11-14 05:04:25,913 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-14 05:04:25,915 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-14 05:04:25,917 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-14 05:04:25,919 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-14 05:04:25,925 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-14 05:04:25,926 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.11 05:04:25" (1/1) ... [2024-11-14 05:04:25,927 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@59ac2fc0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 05:04:25, skipping insertion in model container [2024-11-14 05:04:25,930 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.11 05:04:25" (1/1) ... [2024-11-14 05:04:25,953 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-14 05:04:26,148 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_4d0c78b7-0b89-457e-9d25-69d735257d43/sv-benchmarks/c/nla-digbench-scaling/bresenham-ll_unwindbound5.c[597,610] [2024-11-14 05:04:26,175 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-14 05:04:26,187 INFO L200 MainTranslator]: Completed pre-run [2024-11-14 05:04:26,200 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_4d0c78b7-0b89-457e-9d25-69d735257d43/sv-benchmarks/c/nla-digbench-scaling/bresenham-ll_unwindbound5.c[597,610] [2024-11-14 05:04:26,209 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-14 05:04:26,224 INFO L204 MainTranslator]: Completed translation [2024-11-14 05:04:26,225 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 05:04:26 WrapperNode [2024-11-14 05:04:26,225 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-14 05:04:26,227 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-14 05:04:26,227 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-14 05:04:26,227 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-14 05:04:26,235 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 05:04:26" (1/1) ... [2024-11-14 05:04:26,243 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 05:04:26" (1/1) ... [2024-11-14 05:04:26,262 INFO L138 Inliner]: procedures = 14, calls = 9, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 54 [2024-11-14 05:04:26,263 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-14 05:04:26,263 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-14 05:04:26,263 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-14 05:04:26,264 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-14 05:04:26,272 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 05:04:26" (1/1) ... [2024-11-14 05:04:26,272 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 05:04:26" (1/1) ... [2024-11-14 05:04:26,274 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 05:04:26" (1/1) ... [2024-11-14 05:04:26,274 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 05:04:26" (1/1) ... [2024-11-14 05:04:26,281 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 05:04:26" (1/1) ... [2024-11-14 05:04:26,287 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 05:04:26" (1/1) ... [2024-11-14 05:04:26,289 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 05:04:26" (1/1) ... [2024-11-14 05:04:26,290 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 05:04:26" (1/1) ... [2024-11-14 05:04:26,292 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-14 05:04:26,294 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-14 05:04:26,294 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-14 05:04:26,295 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-14 05:04:26,296 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 05:04:26" (1/1) ... [2024-11-14 05:04:26,304 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2024-11-14 05:04:26,324 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d0c78b7-0b89-457e-9d25-69d735257d43/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 05:04:26,343 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d0c78b7-0b89-457e-9d25-69d735257d43/bin/utaipan-verify-sOmjnqqW8E/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2024-11-14 05:04:26,349 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d0c78b7-0b89-457e-9d25-69d735257d43/bin/utaipan-verify-sOmjnqqW8E/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2024-11-14 05:04:26,374 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-14 05:04:26,374 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2024-11-14 05:04:26,374 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-14 05:04:26,374 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-14 05:04:26,374 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2024-11-14 05:04:26,374 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2024-11-14 05:04:26,447 INFO L238 CfgBuilder]: Building ICFG [2024-11-14 05:04:26,449 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-14 05:04:26,666 INFO L? ?]: Removed 5 outVars from TransFormulas that were not future-live. [2024-11-14 05:04:26,666 INFO L287 CfgBuilder]: Performing block encoding [2024-11-14 05:04:26,753 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-14 05:04:26,753 INFO L316 CfgBuilder]: Removed 1 assume(true) statements. [2024-11-14 05:04:26,754 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.11 05:04:26 BoogieIcfgContainer [2024-11-14 05:04:26,757 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-14 05:04:26,760 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-14 05:04:26,762 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-14 05:04:26,770 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-14 05:04:26,771 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.11 05:04:25" (1/3) ... [2024-11-14 05:04:26,772 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@70df5ccf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.11 05:04:26, skipping insertion in model container [2024-11-14 05:04:26,772 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 05:04:26" (2/3) ... [2024-11-14 05:04:26,773 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@70df5ccf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.11 05:04:26, skipping insertion in model container [2024-11-14 05:04:26,773 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.11 05:04:26" (3/3) ... [2024-11-14 05:04:26,775 INFO L112 eAbstractionObserver]: Analyzing ICFG bresenham-ll_unwindbound5.c [2024-11-14 05:04:26,799 INFO L217 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-14 05:04:26,802 INFO L154 ceAbstractionStarter]: Applying trace abstraction to ICFG bresenham-ll_unwindbound5.c that has 2 procedures, 15 locations, 1 initial locations, 1 loop locations, and 1 error locations. [2024-11-14 05:04:26,886 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-14 05:04:26,907 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;@2e37ea03, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-14 05:04:26,908 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-11-14 05:04:26,913 INFO L276 IsEmpty]: Start isEmpty. Operand has 15 states, 10 states have (on average 1.5) internal successors, (15), 11 states have internal predecessors, (15), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-14 05:04:26,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2024-11-14 05:04:26,923 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 05:04:26,924 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-11-14 05:04:26,926 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 05:04:26,933 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 05:04:26,934 INFO L85 PathProgramCache]: Analyzing trace with hash -943337779, now seen corresponding path program 1 times [2024-11-14 05:04:26,952 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 05:04:26,953 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1630124791] [2024-11-14 05:04:26,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:04:26,954 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 05:04:27,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-14 05:04:27,119 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2069361293] [2024-11-14 05:04:27,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:04:27,121 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 05:04:27,121 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d0c78b7-0b89-457e-9d25-69d735257d43/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 05:04:27,127 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d0c78b7-0b89-457e-9d25-69d735257d43/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 05:04:27,133 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d0c78b7-0b89-457e-9d25-69d735257d43/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-14 05:04:27,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:04:27,258 INFO L255 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 13 conjuncts are in the unsatisfiable core [2024-11-14 05:04:27,268 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 05:04:27,569 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 05:04:27,569 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-14 05:04:27,570 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 05:04:27,571 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1630124791] [2024-11-14 05:04:27,571 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-14 05:04:27,572 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2069361293] [2024-11-14 05:04:27,573 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2069361293] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 05:04:27,573 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-14 05:04:27,574 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-14 05:04:27,576 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [420319362] [2024-11-14 05:04:27,577 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 05:04:27,582 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-14 05:04:27,583 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 05:04:27,611 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-14 05:04:27,612 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-14 05:04:27,614 INFO L87 Difference]: Start difference. First operand has 15 states, 10 states have (on average 1.5) internal successors, (15), 11 states have internal predecessors, (15), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 6 states, 5 states have (on average 1.2) internal successors, (6), 4 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 05:04:27,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 05:04:27,832 INFO L93 Difference]: Finished difference Result 41 states and 58 transitions. [2024-11-14 05:04:27,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-14 05:04:27,837 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 1.2) internal successors, (6), 4 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2024-11-14 05:04:27,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 05:04:27,843 INFO L225 Difference]: With dead ends: 41 [2024-11-14 05:04:27,843 INFO L226 Difference]: Without dead ends: 24 [2024-11-14 05:04:27,846 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-11-14 05:04:27,849 INFO L432 NwaCegarLoop]: 8 mSDtfsCounter, 7 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-14 05:04:27,850 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 39 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-14 05:04:27,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2024-11-14 05:04:27,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 20. [2024-11-14 05:04:27,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 14 states have (on average 1.2857142857142858) internal successors, (18), 16 states have internal predecessors, (18), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-14 05:04:27,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 23 transitions. [2024-11-14 05:04:27,883 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 23 transitions. Word has length 7 [2024-11-14 05:04:27,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 05:04:27,884 INFO L471 AbstractCegarLoop]: Abstraction has 20 states and 23 transitions. [2024-11-14 05:04:27,884 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 1.2) internal successors, (6), 4 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 05:04:27,885 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 23 transitions. [2024-11-14 05:04:27,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2024-11-14 05:04:27,885 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 05:04:27,885 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 05:04:27,903 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d0c78b7-0b89-457e-9d25-69d735257d43/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-14 05:04:28,090 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d0c78b7-0b89-457e-9d25-69d735257d43/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2024-11-14 05:04:28,090 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 05:04:28,091 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 05:04:28,091 INFO L85 PathProgramCache]: Analyzing trace with hash 748726141, now seen corresponding path program 1 times [2024-11-14 05:04:28,091 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 05:04:28,091 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1102078087] [2024-11-14 05:04:28,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:04:28,092 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 05:04:28,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:04:28,268 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 05:04:28,268 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 05:04:28,268 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1102078087] [2024-11-14 05:04:28,268 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1102078087] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 05:04:28,268 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-14 05:04:28,268 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-14 05:04:28,269 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [564942224] [2024-11-14 05:04:28,269 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 05:04:28,269 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-14 05:04:28,269 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 05:04:28,270 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-14 05:04:28,270 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-14 05:04:28,270 INFO L87 Difference]: Start difference. First operand 20 states and 23 transitions. Second operand has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 05:04:28,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 05:04:28,319 INFO L93 Difference]: Finished difference Result 28 states and 30 transitions. [2024-11-14 05:04:28,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-14 05:04:28,320 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2024-11-14 05:04:28,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 05:04:28,322 INFO L225 Difference]: With dead ends: 28 [2024-11-14 05:04:28,322 INFO L226 Difference]: Without dead ends: 20 [2024-11-14 05:04:28,323 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-14 05:04:28,324 INFO L432 NwaCegarLoop]: 11 mSDtfsCounter, 0 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-14 05:04:28,324 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 32 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-14 05:04:28,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2024-11-14 05:04:28,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2024-11-14 05:04:28,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 14 states have (on average 1.2142857142857142) internal successors, (17), 16 states have internal predecessors, (17), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-14 05:04:28,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 22 transitions. [2024-11-14 05:04:28,330 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 22 transitions. Word has length 8 [2024-11-14 05:04:28,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 05:04:28,331 INFO L471 AbstractCegarLoop]: Abstraction has 20 states and 22 transitions. [2024-11-14 05:04:28,331 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 05:04:28,331 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 22 transitions. [2024-11-14 05:04:28,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2024-11-14 05:04:28,332 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 05:04:28,332 INFO L215 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 05:04:28,332 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-14 05:04:28,332 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 05:04:28,333 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 05:04:28,333 INFO L85 PathProgramCache]: Analyzing trace with hash -883214653, now seen corresponding path program 1 times [2024-11-14 05:04:28,333 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 05:04:28,333 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [187745877] [2024-11-14 05:04:28,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:04:28,333 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 05:04:28,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-14 05:04:28,366 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1376987013] [2024-11-14 05:04:28,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:04:28,367 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 05:04:28,367 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d0c78b7-0b89-457e-9d25-69d735257d43/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 05:04:28,369 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d0c78b7-0b89-457e-9d25-69d735257d43/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 05:04:28,370 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d0c78b7-0b89-457e-9d25-69d735257d43/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-14 05:04:28,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:04:28,449 INFO L255 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 13 conjuncts are in the unsatisfiable core [2024-11-14 05:04:28,452 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 05:04:28,672 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 05:04:28,673 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-14 05:04:28,673 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 05:04:28,673 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [187745877] [2024-11-14 05:04:28,673 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-14 05:04:28,673 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1376987013] [2024-11-14 05:04:28,673 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1376987013] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 05:04:28,673 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-14 05:04:28,673 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-11-14 05:04:28,673 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [35534328] [2024-11-14 05:04:28,674 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 05:04:28,674 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-14 05:04:28,674 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 05:04:28,678 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-14 05:04:28,678 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-14 05:04:28,678 INFO L87 Difference]: Start difference. First operand 20 states and 22 transitions. Second operand has 6 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-11-14 05:04:28,816 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 05:04:28,816 INFO L93 Difference]: Finished difference Result 29 states and 31 transitions. [2024-11-14 05:04:28,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-14 05:04:28,817 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 14 [2024-11-14 05:04:28,817 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 05:04:28,818 INFO L225 Difference]: With dead ends: 29 [2024-11-14 05:04:28,818 INFO L226 Difference]: Without dead ends: 21 [2024-11-14 05:04:28,819 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-11-14 05:04:28,820 INFO L432 NwaCegarLoop]: 7 mSDtfsCounter, 4 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-14 05:04:28,820 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 35 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-14 05:04:28,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2024-11-14 05:04:28,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2024-11-14 05:04:28,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 15 states have (on average 1.2) internal successors, (18), 16 states have internal predecessors, (18), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-14 05:04:28,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 23 transitions. [2024-11-14 05:04:28,831 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 23 transitions. Word has length 14 [2024-11-14 05:04:28,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 05:04:28,831 INFO L471 AbstractCegarLoop]: Abstraction has 21 states and 23 transitions. [2024-11-14 05:04:28,832 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-11-14 05:04:28,832 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 23 transitions. [2024-11-14 05:04:28,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2024-11-14 05:04:28,832 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 05:04:28,832 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 05:04:28,855 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d0c78b7-0b89-457e-9d25-69d735257d43/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-11-14 05:04:29,033 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d0c78b7-0b89-457e-9d25-69d735257d43/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 05:04:29,033 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 05:04:29,033 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 05:04:29,034 INFO L85 PathProgramCache]: Analyzing trace with hash -2019708559, now seen corresponding path program 1 times [2024-11-14 05:04:29,034 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 05:04:29,034 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [886119735] [2024-11-14 05:04:29,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:04:29,034 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 05:04:29,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-14 05:04:29,066 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1041430329] [2024-11-14 05:04:29,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:04:29,066 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 05:04:29,066 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d0c78b7-0b89-457e-9d25-69d735257d43/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 05:04:29,069 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d0c78b7-0b89-457e-9d25-69d735257d43/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 05:04:29,074 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d0c78b7-0b89-457e-9d25-69d735257d43/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-14 05:04:29,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:04:29,142 INFO L255 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 17 conjuncts are in the unsatisfiable core [2024-11-14 05:04:29,145 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 05:04:29,774 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 05:04:29,775 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 05:04:30,172 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 05:04:30,172 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 05:04:30,172 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [886119735] [2024-11-14 05:04:30,172 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-14 05:04:30,172 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1041430329] [2024-11-14 05:04:30,172 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1041430329] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 05:04:30,173 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1777888780] [2024-11-14 05:04:30,195 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2024-11-14 05:04:30,195 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 05:04:30,198 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 05:04:30,206 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 05:04:30,206 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 05:04:31,158 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 41 for LOIs [2024-11-14 05:04:31,211 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 05:04:34,533 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '420#(and (<= 1 |#StackHeapBarrier|) (<= 1 ~counter~0) (= |__VERIFIER_assert_#in~cond| 0) (<= ~counter~0 5))' at error location [2024-11-14 05:04:34,534 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 05:04:34,534 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-14 05:04:34,534 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2024-11-14 05:04:34,534 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [60390009] [2024-11-14 05:04:34,535 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-14 05:04:34,535 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-11-14 05:04:34,535 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 05:04:34,537 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-11-14 05:04:34,538 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=255, Unknown=1, NotChecked=0, Total=306 [2024-11-14 05:04:34,539 INFO L87 Difference]: Start difference. First operand 21 states and 23 transitions. Second operand has 10 states, 8 states have (on average 2.25) internal successors, (18), 9 states have internal predecessors, (18), 4 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-14 05:04:35,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 05:04:35,274 INFO L93 Difference]: Finished difference Result 34 states and 38 transitions. [2024-11-14 05:04:35,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-14 05:04:35,275 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 8 states have (on average 2.25) internal successors, (18), 9 states have internal predecessors, (18), 4 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 15 [2024-11-14 05:04:35,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 05:04:35,277 INFO L225 Difference]: With dead ends: 34 [2024-11-14 05:04:35,277 INFO L226 Difference]: Without dead ends: 30 [2024-11-14 05:04:35,278 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=75, Invalid=386, Unknown=1, NotChecked=0, Total=462 [2024-11-14 05:04:35,279 INFO L432 NwaCegarLoop]: 9 mSDtfsCounter, 19 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 61 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 68 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 61 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-14 05:04:35,280 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 43 Invalid, 68 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 61 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-14 05:04:35,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2024-11-14 05:04:35,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 23. [2024-11-14 05:04:35,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 17 states have (on average 1.1176470588235294) internal successors, (19), 17 states have internal predecessors, (19), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-14 05:04:35,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 24 transitions. [2024-11-14 05:04:35,292 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 24 transitions. Word has length 15 [2024-11-14 05:04:35,292 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 05:04:35,293 INFO L471 AbstractCegarLoop]: Abstraction has 23 states and 24 transitions. [2024-11-14 05:04:35,293 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 8 states have (on average 2.25) internal successors, (18), 9 states have internal predecessors, (18), 4 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-14 05:04:35,293 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 24 transitions. [2024-11-14 05:04:35,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2024-11-14 05:04:35,294 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 05:04:35,295 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 05:04:35,319 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d0c78b7-0b89-457e-9d25-69d735257d43/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-11-14 05:04:35,499 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d0c78b7-0b89-457e-9d25-69d735257d43/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 05:04:35,500 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 05:04:35,500 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 05:04:35,500 INFO L85 PathProgramCache]: Analyzing trace with hash 1740970329, now seen corresponding path program 1 times [2024-11-14 05:04:35,500 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 05:04:35,501 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [573119906] [2024-11-14 05:04:35,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:04:35,501 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 05:04:35,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:04:35,844 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 05:04:35,844 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 05:04:35,844 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [573119906] [2024-11-14 05:04:35,844 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [573119906] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 05:04:35,844 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1878778308] [2024-11-14 05:04:35,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:04:35,845 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 05:04:35,845 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d0c78b7-0b89-457e-9d25-69d735257d43/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 05:04:35,851 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d0c78b7-0b89-457e-9d25-69d735257d43/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 05:04:35,854 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d0c78b7-0b89-457e-9d25-69d735257d43/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-14 05:04:35,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:04:35,921 INFO L255 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-11-14 05:04:35,922 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 05:04:36,050 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 05:04:36,050 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 05:04:36,261 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 05:04:36,265 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1878778308] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 05:04:36,265 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [47993865] [2024-11-14 05:04:36,267 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2024-11-14 05:04:36,267 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 05:04:36,268 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 05:04:36,268 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 05:04:36,268 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 05:04:36,747 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 76 for LOIs [2024-11-14 05:04:36,843 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 05:04:43,077 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '616#(and (<= 1 |#StackHeapBarrier|) (<= 1 ~counter~0) (= |__VERIFIER_assert_#in~cond| 0))' at error location [2024-11-14 05:04:43,078 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 05:04:43,078 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 05:04:43,078 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 4, 5] total 10 [2024-11-14 05:04:43,078 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1455651626] [2024-11-14 05:04:43,078 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 05:04:43,079 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-11-14 05:04:43,079 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 05:04:43,079 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-11-14 05:04:43,080 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=318, Unknown=1, NotChecked=0, Total=380 [2024-11-14 05:04:43,080 INFO L87 Difference]: Start difference. First operand 23 states and 24 transitions. Second operand has 10 states, 10 states have (on average 2.5) internal successors, (25), 10 states have internal predecessors, (25), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2024-11-14 05:04:43,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 05:04:43,357 INFO L93 Difference]: Finished difference Result 59 states and 62 transitions. [2024-11-14 05:04:43,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-14 05:04:43,358 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.5) internal successors, (25), 10 states have internal predecessors, (25), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 16 [2024-11-14 05:04:43,359 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 05:04:43,359 INFO L225 Difference]: With dead ends: 59 [2024-11-14 05:04:43,361 INFO L226 Difference]: Without dead ends: 53 [2024-11-14 05:04:43,362 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 6.6s TimeCoverageRelationStatistics Valid=74, Invalid=387, Unknown=1, NotChecked=0, Total=462 [2024-11-14 05:04:43,363 INFO L432 NwaCegarLoop]: 11 mSDtfsCounter, 21 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-14 05:04:43,363 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 55 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-14 05:04:43,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2024-11-14 05:04:43,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 41. [2024-11-14 05:04:43,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 31 states have (on average 1.1290322580645162) internal successors, (35), 31 states have internal predecessors, (35), 5 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2024-11-14 05:04:43,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 44 transitions. [2024-11-14 05:04:43,387 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 44 transitions. Word has length 16 [2024-11-14 05:04:43,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 05:04:43,387 INFO L471 AbstractCegarLoop]: Abstraction has 41 states and 44 transitions. [2024-11-14 05:04:43,388 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.5) internal successors, (25), 10 states have internal predecessors, (25), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2024-11-14 05:04:43,388 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 44 transitions. [2024-11-14 05:04:43,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2024-11-14 05:04:43,389 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 05:04:43,389 INFO L215 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 05:04:43,412 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d0c78b7-0b89-457e-9d25-69d735257d43/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-11-14 05:04:43,593 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d0c78b7-0b89-457e-9d25-69d735257d43/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 05:04:43,594 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 05:04:43,594 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 05:04:43,594 INFO L85 PathProgramCache]: Analyzing trace with hash 830591903, now seen corresponding path program 1 times [2024-11-14 05:04:43,594 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 05:04:43,595 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [649833864] [2024-11-14 05:04:43,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:04:43,595 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 05:04:43,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-14 05:04:43,637 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1777180246] [2024-11-14 05:04:43,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:04:43,638 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 05:04:43,638 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d0c78b7-0b89-457e-9d25-69d735257d43/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 05:04:43,642 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d0c78b7-0b89-457e-9d25-69d735257d43/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 05:04:43,645 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d0c78b7-0b89-457e-9d25-69d735257d43/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-14 05:04:43,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:04:43,720 INFO L255 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 27 conjuncts are in the unsatisfiable core [2024-11-14 05:04:43,725 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 05:04:45,074 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-14 05:04:45,075 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 05:04:46,224 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 10 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-14 05:04:46,224 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 05:04:46,224 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [649833864] [2024-11-14 05:04:46,224 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-14 05:04:46,225 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1777180246] [2024-11-14 05:04:46,225 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1777180246] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 05:04:46,225 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1204349494] [2024-11-14 05:04:46,227 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2024-11-14 05:04:46,231 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 05:04:46,231 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 05:04:46,231 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 05:04:46,231 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 05:04:46,671 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 61 for LOIs [2024-11-14 05:04:46,742 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 05:04:52,665 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '917#(and (<= 1 |#StackHeapBarrier|) (<= 1 ~counter~0) (= |__VERIFIER_assert_#in~cond| 0) (<= ~counter~0 5))' at error location [2024-11-14 05:04:52,665 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 05:04:52,666 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-14 05:04:52,666 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2024-11-14 05:04:52,666 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [301231511] [2024-11-14 05:04:52,666 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-14 05:04:52,666 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-11-14 05:04:52,666 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 05:04:52,667 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-11-14 05:04:52,667 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=609, Unknown=1, NotChecked=0, Total=702 [2024-11-14 05:04:52,668 INFO L87 Difference]: Start difference. First operand 41 states and 44 transitions. Second operand has 17 states, 13 states have (on average 2.076923076923077) internal successors, (27), 15 states have internal predecessors, (27), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2024-11-14 05:04:53,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 05:04:53,640 INFO L93 Difference]: Finished difference Result 49 states and 51 transitions. [2024-11-14 05:04:53,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-11-14 05:04:53,640 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 13 states have (on average 2.076923076923077) internal successors, (27), 15 states have internal predecessors, (27), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 22 [2024-11-14 05:04:53,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 05:04:53,641 INFO L225 Difference]: With dead ends: 49 [2024-11-14 05:04:53,641 INFO L226 Difference]: Without dead ends: 41 [2024-11-14 05:04:53,642 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 37 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 204 ImplicationChecksByTransitivity, 7.7s TimeCoverageRelationStatistics Valid=128, Invalid=801, Unknown=1, NotChecked=0, Total=930 [2024-11-14 05:04:53,644 INFO L432 NwaCegarLoop]: 8 mSDtfsCounter, 11 mSDsluCounter, 74 mSDsCounter, 0 mSdLazyCounter, 131 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 82 SdHoareTripleChecker+Invalid, 139 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 131 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-11-14 05:04:53,644 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 82 Invalid, 139 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 131 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-11-14 05:04:53,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2024-11-14 05:04:53,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2024-11-14 05:04:53,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 31 states have (on average 1.032258064516129) internal successors, (32), 31 states have internal predecessors, (32), 5 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2024-11-14 05:04:53,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 41 transitions. [2024-11-14 05:04:53,659 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 41 transitions. Word has length 22 [2024-11-14 05:04:53,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 05:04:53,660 INFO L471 AbstractCegarLoop]: Abstraction has 41 states and 41 transitions. [2024-11-14 05:04:53,660 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 13 states have (on average 2.076923076923077) internal successors, (27), 15 states have internal predecessors, (27), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2024-11-14 05:04:53,660 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 41 transitions. [2024-11-14 05:04:53,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2024-11-14 05:04:53,661 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 05:04:53,662 INFO L215 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1] [2024-11-14 05:04:53,682 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d0c78b7-0b89-457e-9d25-69d735257d43/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2024-11-14 05:04:53,866 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d0c78b7-0b89-457e-9d25-69d735257d43/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 05:04:53,866 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 05:04:53,867 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 05:04:53,867 INFO L85 PathProgramCache]: Analyzing trace with hash -1720138003, now seen corresponding path program 2 times [2024-11-14 05:04:53,867 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 05:04:53,867 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1311872238] [2024-11-14 05:04:53,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:04:53,867 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 05:04:53,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:04:54,538 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 8 proven. 32 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-11-14 05:04:54,538 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 05:04:54,538 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1311872238] [2024-11-14 05:04:54,538 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1311872238] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 05:04:54,538 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [146211059] [2024-11-14 05:04:54,539 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-14 05:04:54,539 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 05:04:54,539 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d0c78b7-0b89-457e-9d25-69d735257d43/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 05:04:54,541 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d0c78b7-0b89-457e-9d25-69d735257d43/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 05:04:54,546 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d0c78b7-0b89-457e-9d25-69d735257d43/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-14 05:04:54,640 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2024-11-14 05:04:54,640 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 05:04:54,644 INFO L255 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 11 conjuncts are in the unsatisfiable core [2024-11-14 05:04:54,646 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 05:04:54,889 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 8 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 05:04:54,889 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 05:04:55,195 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 8 proven. 32 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-11-14 05:04:55,195 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [146211059] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 05:04:55,195 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [147205521] [2024-11-14 05:04:55,198 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2024-11-14 05:04:55,198 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 05:04:55,198 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 05:04:55,199 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 05:04:55,199 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 05:04:55,550 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 76 for LOIs [2024-11-14 05:04:55,651 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 05:05:01,336 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1310#(and (<= 1 |#StackHeapBarrier|) (<= 1 ~counter~0) (= |__VERIFIER_assert_#in~cond| 0))' at error location [2024-11-14 05:05:01,336 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 05:05:01,336 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 05:05:01,336 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 8] total 10 [2024-11-14 05:05:01,337 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1638630403] [2024-11-14 05:05:01,337 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 05:05:01,337 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-11-14 05:05:01,337 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 05:05:01,338 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-11-14 05:05:01,338 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=349, Unknown=1, NotChecked=0, Total=420 [2024-11-14 05:05:01,338 INFO L87 Difference]: Start difference. First operand 41 states and 41 transitions. Second operand has 10 states, 10 states have (on average 3.7) internal successors, (37), 10 states have internal predecessors, (37), 5 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2024-11-14 05:05:01,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 05:05:01,683 INFO L93 Difference]: Finished difference Result 55 states and 55 transitions. [2024-11-14 05:05:01,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-11-14 05:05:01,683 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.7) internal successors, (37), 10 states have internal predecessors, (37), 5 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) Word has length 40 [2024-11-14 05:05:01,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 05:05:01,685 INFO L225 Difference]: With dead ends: 55 [2024-11-14 05:05:01,685 INFO L226 Difference]: Without dead ends: 49 [2024-11-14 05:05:01,685 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 102 SyntacticMatches, 6 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 172 ImplicationChecksByTransitivity, 6.2s TimeCoverageRelationStatistics Valid=91, Invalid=460, Unknown=1, NotChecked=0, Total=552 [2024-11-14 05:05:01,686 INFO L432 NwaCegarLoop]: 10 mSDtfsCounter, 0 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-14 05:05:01,687 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 44 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-14 05:05:01,688 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2024-11-14 05:05:01,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2024-11-14 05:05:01,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 37 states have (on average 1.027027027027027) internal successors, (38), 37 states have internal predecessors, (38), 6 states have call successors, (6), 6 states have call predecessors, (6), 5 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2024-11-14 05:05:01,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 49 transitions. [2024-11-14 05:05:01,704 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 49 transitions. Word has length 40 [2024-11-14 05:05:01,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 05:05:01,704 INFO L471 AbstractCegarLoop]: Abstraction has 49 states and 49 transitions. [2024-11-14 05:05:01,705 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.7) internal successors, (37), 10 states have internal predecessors, (37), 5 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2024-11-14 05:05:01,705 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 49 transitions. [2024-11-14 05:05:01,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2024-11-14 05:05:01,706 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 05:05:01,706 INFO L215 NwaCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1] [2024-11-14 05:05:01,732 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d0c78b7-0b89-457e-9d25-69d735257d43/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2024-11-14 05:05:01,907 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d0c78b7-0b89-457e-9d25-69d735257d43/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 05:05:01,907 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 05:05:01,907 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 05:05:01,908 INFO L85 PathProgramCache]: Analyzing trace with hash -1543583543, now seen corresponding path program 3 times [2024-11-14 05:05:01,908 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 05:05:01,908 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1100522626] [2024-11-14 05:05:01,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:05:01,908 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 05:05:02,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-14 05:05:02,018 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1100388992] [2024-11-14 05:05:02,018 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-14 05:05:02,018 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 05:05:02,018 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d0c78b7-0b89-457e-9d25-69d735257d43/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 05:05:02,024 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d0c78b7-0b89-457e-9d25-69d735257d43/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 05:05:02,026 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d0c78b7-0b89-457e-9d25-69d735257d43/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-14 05:05:02,308 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-14 05:05:02,309 INFO L228 tOrderPrioritization]: Conjunction of SSA is sat [2024-11-14 05:05:02,309 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-11-14 05:05:02,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-11-14 05:05:02,377 INFO L130 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2024-11-14 05:05:02,377 INFO L325 BasicCegarLoop]: Counterexample is feasible [2024-11-14 05:05:02,378 INFO L782 garLoopResultBuilder]: Registering result UNSAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2024-11-14 05:05:02,389 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d0c78b7-0b89-457e-9d25-69d735257d43/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2024-11-14 05:05:02,582 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d0c78b7-0b89-457e-9d25-69d735257d43/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 05:05:02,586 INFO L407 BasicCegarLoop]: Path program histogram: [3, 1, 1, 1, 1, 1] [2024-11-14 05:05:02,645 INFO L173 ceAbstractionStarter]: Computing trace abstraction results [2024-11-14 05:05:02,654 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 14.11 05:05:02 BoogieIcfgContainer [2024-11-14 05:05:02,654 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2024-11-14 05:05:02,654 INFO L112 PluginConnector]: ------------------------Witness Printer---------------------------- [2024-11-14 05:05:02,655 INFO L270 PluginConnector]: Initializing Witness Printer... [2024-11-14 05:05:02,655 INFO L274 PluginConnector]: Witness Printer initialized [2024-11-14 05:05:02,656 INFO L184 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.11 05:04:26" (3/4) ... [2024-11-14 05:05:02,657 INFO L136 WitnessPrinter]: Generating witness for reachability counterexample [2024-11-14 05:05:02,733 INFO L149 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d0c78b7-0b89-457e-9d25-69d735257d43/bin/utaipan-verify-sOmjnqqW8E/witness.graphml [2024-11-14 05:05:02,734 INFO L131 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2024-11-14 05:05:02,735 INFO L158 Benchmark]: Toolchain (without parser) took 36819.67ms. Allocated memory was 117.4MB in the beginning and 352.3MB in the end (delta: 234.9MB). Free memory was 93.1MB in the beginning and 250.1MB in the end (delta: -156.9MB). Peak memory consumption was 73.1MB. Max. memory is 16.1GB. [2024-11-14 05:05:02,735 INFO L158 Benchmark]: CDTParser took 1.28ms. Allocated memory is still 167.8MB. Free memory is still 103.9MB. There was no memory consumed. Max. memory is 16.1GB. [2024-11-14 05:05:02,735 INFO L158 Benchmark]: CACSL2BoogieTranslator took 308.94ms. Allocated memory is still 117.4MB. Free memory was 93.1MB in the beginning and 81.9MB in the end (delta: 11.3MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2024-11-14 05:05:02,736 INFO L158 Benchmark]: Boogie Procedure Inliner took 36.22ms. Allocated memory is still 117.4MB. Free memory was 81.9MB in the beginning and 80.8MB in the end (delta: 1.1MB). There was no memory consumed. Max. memory is 16.1GB. [2024-11-14 05:05:02,736 INFO L158 Benchmark]: Boogie Preprocessor took 29.08ms. Allocated memory is still 117.4MB. Free memory was 80.5MB in the beginning and 79.8MB in the end (delta: 679.0kB). There was no memory consumed. Max. memory is 16.1GB. [2024-11-14 05:05:02,736 INFO L158 Benchmark]: RCFGBuilder took 462.96ms. Allocated memory is still 117.4MB. Free memory was 79.8MB in the beginning and 67.3MB in the end (delta: 12.5MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. [2024-11-14 05:05:02,737 INFO L158 Benchmark]: TraceAbstraction took 35893.87ms. Allocated memory was 117.4MB in the beginning and 352.3MB in the end (delta: 234.9MB). Free memory was 66.9MB in the beginning and 254.0MB in the end (delta: -187.1MB). Peak memory consumption was 48.0MB. Max. memory is 16.1GB. [2024-11-14 05:05:02,737 INFO L158 Benchmark]: Witness Printer took 79.35ms. Allocated memory is still 352.3MB. Free memory was 254.0MB in the beginning and 250.1MB in the end (delta: 4.0MB). There was no memory consumed. Max. memory is 16.1GB. [2024-11-14 05:05:02,740 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 1.28ms. Allocated memory is still 167.8MB. Free memory is still 103.9MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 308.94ms. Allocated memory is still 117.4MB. Free memory was 93.1MB in the beginning and 81.9MB in the end (delta: 11.3MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 36.22ms. Allocated memory is still 117.4MB. Free memory was 81.9MB in the beginning and 80.8MB in the end (delta: 1.1MB). There was no memory consumed. Max. memory is 16.1GB. * Boogie Preprocessor took 29.08ms. Allocated memory is still 117.4MB. Free memory was 80.5MB in the beginning and 79.8MB in the end (delta: 679.0kB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 462.96ms. Allocated memory is still 117.4MB. Free memory was 79.8MB in the beginning and 67.3MB in the end (delta: 12.5MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. * TraceAbstraction took 35893.87ms. Allocated memory was 117.4MB in the beginning and 352.3MB in the end (delta: 234.9MB). Free memory was 66.9MB in the beginning and 254.0MB in the end (delta: -187.1MB). Peak memory consumption was 48.0MB. Max. memory is 16.1GB. * Witness Printer took 79.35ms. Allocated memory is still 352.3MB. Free memory was 254.0MB in the beginning and 250.1MB in the end (delta: 4.0MB). There was no memory consumed. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - CounterExampleResult [Line: 16]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L21] int counter = 0; [L23] int X, Y; [L24] long long x, y, v, xy, yx; [L25] X = __VERIFIER_nondet_int() [L26] Y = __VERIFIER_nondet_int() [L27] v = ((long long) 2 * Y) - X [L28] y = 0 [L29] x = 0 VAL [X=6, Y=2, counter=0, v=-2, x=0, y=0] [L31] EXPR counter++ VAL [X=6, Y=2, counter=1, v=-2, x=0, y=0] [L31] COND TRUE counter++<5 [L32] yx = (long long) Y*x [L33] xy = (long long) X*y VAL [X=6, Y=2, counter=1, v=-2, x=0, xy=0, y=0, yx=0] [L34] CALL __VERIFIER_assert( 2*yx - 2*xy - X + (long long) 2*Y - v == 0) VAL [\old(cond)=1, counter=1] [L14] COND FALSE !(!(cond)) VAL [\old(cond)=1, counter=1] [L34] RET __VERIFIER_assert( 2*yx - 2*xy - X + (long long) 2*Y - v == 0) VAL [X=6, Y=2, counter=1, v=-2, x=0, xy=0, y=0, yx=0] [L35] COND FALSE !(!(x <= X)) [L39] COND TRUE v < 0 [L40] v = v + (long long) 2 * Y [L45] x++ VAL [X=6, Y=2, counter=1, v=2, x=1, xy=0, y=0, yx=0] [L31] EXPR counter++ VAL [X=6, Y=2, counter=2, v=2, x=1, xy=0, y=0, yx=0] [L31] COND TRUE counter++<5 [L32] yx = (long long) Y*x [L33] xy = (long long) X*y VAL [X=6, Y=2, counter=2, v=2, x=1, xy=0, y=0, yx=2] [L34] CALL __VERIFIER_assert( 2*yx - 2*xy - X + (long long) 2*Y - v == 0) VAL [\old(cond)=1, counter=2] [L14] COND FALSE !(!(cond)) VAL [\old(cond)=1, counter=2] [L34] RET __VERIFIER_assert( 2*yx - 2*xy - X + (long long) 2*Y - v == 0) VAL [X=6, Y=2, counter=2, v=2, x=1, xy=0, y=0, yx=2] [L35] COND FALSE !(!(x <= X)) [L39] COND FALSE !(v < 0) [L42] v = v + 2 * ((long long) Y - X) [L43] y++ [L45] x++ VAL [X=6, Y=2, counter=2, v=-6, x=2, xy=0, y=1, yx=2] [L31] EXPR counter++ VAL [X=6, Y=2, counter=3, v=-6, x=2, xy=0, y=1, yx=2] [L31] COND TRUE counter++<5 [L32] yx = (long long) Y*x [L33] xy = (long long) X*y VAL [X=6, Y=2, counter=3, v=-6, x=2, xy=6, y=1, yx=4] [L34] CALL __VERIFIER_assert( 2*yx - 2*xy - X + (long long) 2*Y - v == 0) VAL [\old(cond)=1, counter=3] [L14] COND FALSE !(!(cond)) VAL [\old(cond)=1, counter=3] [L34] RET __VERIFIER_assert( 2*yx - 2*xy - X + (long long) 2*Y - v == 0) VAL [X=6, Y=2, counter=3, v=-6, x=2, xy=6, y=1, yx=4] [L35] COND FALSE !(!(x <= X)) [L39] COND TRUE v < 0 [L40] v = v + (long long) 2 * Y [L45] x++ VAL [X=6, Y=2, counter=3, v=-2, x=3, xy=6, y=1, yx=4] [L31] EXPR counter++ VAL [X=6, Y=2, counter=4, v=-2, x=3, xy=6, y=1, yx=4] [L31] COND TRUE counter++<5 [L32] yx = (long long) Y*x [L33] xy = (long long) X*y VAL [X=6, Y=2, counter=4, v=-2, x=3, xy=6, y=1, yx=6] [L34] CALL __VERIFIER_assert( 2*yx - 2*xy - X + (long long) 2*Y - v == 0) VAL [\old(cond)=1, counter=4] [L14] COND FALSE !(!(cond)) VAL [\old(cond)=1, counter=4] [L34] RET __VERIFIER_assert( 2*yx - 2*xy - X + (long long) 2*Y - v == 0) VAL [X=6, Y=2, counter=4, v=-2, x=3, xy=6, y=1, yx=6] [L35] COND FALSE !(!(x <= X)) [L39] COND TRUE v < 0 [L40] v = v + (long long) 2 * Y [L45] x++ VAL [X=6, Y=2, counter=4, v=2, x=4, xy=6, y=1, yx=6] [L31] EXPR counter++ VAL [X=6, Y=2, counter=5, v=2, x=4, xy=6, y=1, yx=6] [L31] COND TRUE counter++<5 [L32] yx = (long long) Y*x [L33] xy = (long long) X*y VAL [X=6, Y=2, counter=5, v=2, x=4, xy=6, y=1, yx=8] [L34] CALL __VERIFIER_assert( 2*yx - 2*xy - X + (long long) 2*Y - v == 0) VAL [\old(cond)=1, counter=5] [L14] COND FALSE !(!(cond)) VAL [\old(cond)=1, counter=5] [L34] RET __VERIFIER_assert( 2*yx - 2*xy - X + (long long) 2*Y - v == 0) VAL [X=6, Y=2, counter=5, v=2, x=4, xy=6, y=1, yx=8] [L35] COND FALSE !(!(x <= X)) [L39] COND FALSE !(v < 0) [L42] v = v + 2 * ((long long) Y - X) [L43] y++ [L45] x++ VAL [X=6, Y=2, counter=5, v=-6, x=5, xy=6, y=2, yx=8] [L31] EXPR counter++ VAL [X=6, Y=2, counter=6, v=-6, x=5, xy=6, y=2, yx=8] [L31] COND FALSE !(counter++<5) [L47] xy = (long long) x*y [L48] yx = (long long) Y*x VAL [X=6, Y=2, counter=6, v=-6, xy=10, y=2, yx=10] [L49] CALL __VERIFIER_assert(2*yx - 2*xy - X + (long long) 2*Y - v + 2*y == 0) VAL [\old(cond)=0, counter=6] [L14] COND TRUE !(cond) VAL [\old(cond)=0, counter=6] [L16] reach_error() VAL [\old(cond)=0, counter=6] - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 15 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 35.7s, OverallIterations: 8, TraceHistogramMax: 6, PathProgramHistogramMax: 3, EmptinessCheckTime: 0.0s, AutomataDifference: 2.8s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 64 SdHoareTripleChecker+Valid, 1.5s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 62 mSDsluCounter, 330 SdHoareTripleChecker+Invalid, 1.3s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 266 mSDsCounter, 22 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 361 IncrementalHoareTripleChecker+Invalid, 383 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 22 mSolverCounterUnsat, 64 mSDtfsCounter, 361 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 325 GetRequests, 210 SyntacticMatches, 10 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 568 ImplicationChecksByTransitivity, 24.8s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=49occurred in iteration=7, InterpolantAutomatonStates: 67, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 7 MinimizatonAttempts, 23 StatesRemovedByMinimization, 3 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.7s SatisfiabilityAnalysisTime, 6.1s InterpolantComputationTime, 332 NumberOfCodeBlocks, 332 NumberOfCodeBlocksAsserted, 20 NumberOfCheckSat, 258 ConstructedInterpolants, 0 QuantifiedInterpolants, 1425 SizeOfPredicates, 17 NumberOfNonLiveVariables, 488 ConjunctsInSsa, 86 ConjunctsInUnsatCore, 13 InterpolantComputations, 3 PerfectInterpolantSequences, 104/240 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! [2024-11-14 05:05:02,889 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d0c78b7-0b89-457e-9d25-69d735257d43/bin/utaipan-verify-sOmjnqqW8E/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Ended with exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE