./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-examples/sorting_bubblesort_2_ground.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 826ab2ba Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65bf2dd1-8840-45cc-86cd-4e637ac30725/bin/utaipan-verify-sOmjnqqW8E/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65bf2dd1-8840-45cc-86cd-4e637ac30725/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_65bf2dd1-8840-45cc-86cd-4e637ac30725/bin/utaipan-verify-sOmjnqqW8E/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65bf2dd1-8840-45cc-86cd-4e637ac30725/bin/utaipan-verify-sOmjnqqW8E/config/TaipanReach.xml -i ../../sv-benchmarks/c/array-examples/sorting_bubblesort_2_ground.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65bf2dd1-8840-45cc-86cd-4e637ac30725/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_65bf2dd1-8840-45cc-86cd-4e637ac30725/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 2e8196ca3e7f8da6be63ed057317b8a370ba560e11740ea9a51451f140c434c1 --- Real Ultimate output --- This is Ultimate 0.3.0-dev-826ab2b [2024-11-14 02:56:35,827 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-14 02:56:35,898 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65bf2dd1-8840-45cc-86cd-4e637ac30725/bin/utaipan-verify-sOmjnqqW8E/config/svcomp-Reach-32bit-Taipan_Default.epf [2024-11-14 02:56:35,903 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-14 02:56:35,903 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-14 02:56:35,927 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-14 02:56:35,928 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-14 02:56:35,928 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-14 02:56:35,928 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-14 02:56:35,928 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-14 02:56:35,928 INFO L153 SettingsManager]: * User list type=DISABLED [2024-11-14 02:56:35,929 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2024-11-14 02:56:35,929 INFO L153 SettingsManager]: * Explicit value domain=true [2024-11-14 02:56:35,929 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2024-11-14 02:56:35,929 INFO L153 SettingsManager]: * Octagon Domain=false [2024-11-14 02:56:35,929 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2024-11-14 02:56:35,929 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2024-11-14 02:56:35,930 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2024-11-14 02:56:35,930 INFO L153 SettingsManager]: * Interval Domain=false [2024-11-14 02:56:35,930 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2024-11-14 02:56:35,930 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2024-11-14 02:56:35,930 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2024-11-14 02:56:35,931 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-14 02:56:35,931 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-14 02:56:35,931 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-14 02:56:35,931 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-14 02:56:35,931 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-14 02:56:35,931 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-14 02:56:35,932 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-14 02:56:35,932 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-14 02:56:35,932 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-14 02:56:35,932 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-14 02:56:35,932 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-14 02:56:35,932 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-14 02:56:35,932 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-14 02:56:35,933 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-14 02:56:35,933 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-14 02:56:35,933 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-14 02:56:35,933 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2024-11-14 02:56:35,933 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-14 02:56:35,933 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-14 02:56:35,934 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-14 02:56:35,934 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2024-11-14 02:56:35,934 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-14 02:56:35,934 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-14 02:56:35,934 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2024-11-14 02:56:35,934 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-14 02:56:35,934 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_65bf2dd1-8840-45cc-86cd-4e637ac30725/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 -> 2e8196ca3e7f8da6be63ed057317b8a370ba560e11740ea9a51451f140c434c1 [2024-11-14 02:56:36,229 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-14 02:56:36,237 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-14 02:56:36,240 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-14 02:56:36,241 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-14 02:56:36,242 INFO L274 PluginConnector]: CDTParser initialized [2024-11-14 02:56:36,243 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65bf2dd1-8840-45cc-86cd-4e637ac30725/bin/utaipan-verify-sOmjnqqW8E/../../sv-benchmarks/c/array-examples/sorting_bubblesort_2_ground.i Unable to find full path for "g++" [2024-11-14 02:56:38,101 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-14 02:56:38,338 INFO L384 CDTParser]: Found 1 translation units. [2024-11-14 02:56:38,338 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65bf2dd1-8840-45cc-86cd-4e637ac30725/sv-benchmarks/c/array-examples/sorting_bubblesort_2_ground.i [2024-11-14 02:56:38,355 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65bf2dd1-8840-45cc-86cd-4e637ac30725/bin/utaipan-verify-sOmjnqqW8E/data/13693b7b8/a3546037caec4e9a8eea928f56e75621/FLAG1bd6b9a64 [2024-11-14 02:56:38,388 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65bf2dd1-8840-45cc-86cd-4e637ac30725/bin/utaipan-verify-sOmjnqqW8E/data/13693b7b8/a3546037caec4e9a8eea928f56e75621 [2024-11-14 02:56:38,395 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-14 02:56:38,397 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-14 02:56:38,403 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-14 02:56:38,403 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-14 02:56:38,407 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-14 02:56:38,407 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.11 02:56:38" (1/1) ... [2024-11-14 02:56:38,408 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@78db6e7d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 02:56:38, skipping insertion in model container [2024-11-14 02:56:38,408 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.11 02:56:38" (1/1) ... [2024-11-14 02:56:38,422 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-14 02:56:38,573 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_65bf2dd1-8840-45cc-86cd-4e637ac30725/sv-benchmarks/c/array-examples/sorting_bubblesort_2_ground.i[820,833] [2024-11-14 02:56:38,599 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-14 02:56:38,607 INFO L200 MainTranslator]: Completed pre-run [2024-11-14 02:56:38,618 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_65bf2dd1-8840-45cc-86cd-4e637ac30725/sv-benchmarks/c/array-examples/sorting_bubblesort_2_ground.i[820,833] [2024-11-14 02:56:38,632 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-14 02:56:38,654 INFO L204 MainTranslator]: Completed translation [2024-11-14 02:56:38,654 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 02:56:38 WrapperNode [2024-11-14 02:56:38,654 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-14 02:56:38,655 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-14 02:56:38,656 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-14 02:56:38,656 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-14 02:56:38,664 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 02:56:38" (1/1) ... [2024-11-14 02:56:38,673 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 02:56:38" (1/1) ... [2024-11-14 02:56:38,694 INFO L138 Inliner]: procedures = 16, calls = 19, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 80 [2024-11-14 02:56:38,696 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-14 02:56:38,696 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-14 02:56:38,697 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-14 02:56:38,697 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-14 02:56:38,704 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 02:56:38" (1/1) ... [2024-11-14 02:56:38,704 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 02:56:38" (1/1) ... [2024-11-14 02:56:38,706 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 02:56:38" (1/1) ... [2024-11-14 02:56:38,708 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 02:56:38" (1/1) ... [2024-11-14 02:56:38,716 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 02:56:38" (1/1) ... [2024-11-14 02:56:38,722 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 02:56:38" (1/1) ... [2024-11-14 02:56:38,727 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 02:56:38" (1/1) ... [2024-11-14 02:56:38,728 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 02:56:38" (1/1) ... [2024-11-14 02:56:38,729 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-14 02:56:38,734 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-14 02:56:38,734 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-14 02:56:38,734 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-14 02:56:38,735 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 02:56:38" (1/1) ... [2024-11-14 02:56:38,746 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2024-11-14 02:56:38,759 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65bf2dd1-8840-45cc-86cd-4e637ac30725/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 02:56:38,775 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65bf2dd1-8840-45cc-86cd-4e637ac30725/bin/utaipan-verify-sOmjnqqW8E/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2024-11-14 02:56:38,785 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65bf2dd1-8840-45cc-86cd-4e637ac30725/bin/utaipan-verify-sOmjnqqW8E/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2024-11-14 02:56:38,808 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-14 02:56:38,808 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2024-11-14 02:56:38,808 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-11-14 02:56:38,809 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2024-11-14 02:56:38,809 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-14 02:56:38,809 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-14 02:56:38,809 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2024-11-14 02:56:38,809 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-11-14 02:56:38,899 INFO L238 CfgBuilder]: Building ICFG [2024-11-14 02:56:38,901 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-14 02:56:39,038 INFO L? ?]: Removed 12 outVars from TransFormulas that were not future-live. [2024-11-14 02:56:39,039 INFO L287 CfgBuilder]: Performing block encoding [2024-11-14 02:56:39,089 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-14 02:56:39,090 INFO L316 CfgBuilder]: Removed 5 assume(true) statements. [2024-11-14 02:56:39,090 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.11 02:56:39 BoogieIcfgContainer [2024-11-14 02:56:39,090 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-14 02:56:39,093 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-14 02:56:39,093 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-14 02:56:39,101 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-14 02:56:39,102 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.11 02:56:38" (1/3) ... [2024-11-14 02:56:39,102 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5884ff8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.11 02:56:39, skipping insertion in model container [2024-11-14 02:56:39,103 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 02:56:38" (2/3) ... [2024-11-14 02:56:39,103 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5884ff8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.11 02:56:39, skipping insertion in model container [2024-11-14 02:56:39,103 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.11 02:56:39" (3/3) ... [2024-11-14 02:56:39,104 INFO L112 eAbstractionObserver]: Analyzing ICFG sorting_bubblesort_2_ground.i [2024-11-14 02:56:39,120 INFO L217 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-14 02:56:39,122 INFO L154 ceAbstractionStarter]: Applying trace abstraction to ICFG sorting_bubblesort_2_ground.i that has 1 procedures, 11 locations, 1 initial locations, 5 loop locations, and 1 error locations. [2024-11-14 02:56:39,172 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-14 02:56:39,187 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;@44dc141c, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-14 02:56:39,188 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-11-14 02:56:39,192 INFO L276 IsEmpty]: Start isEmpty. Operand has 11 states, 9 states have (on average 1.7777777777777777) internal successors, (16), 10 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 02:56:39,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2024-11-14 02:56:39,200 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 02:56:39,200 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-11-14 02:56:39,201 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 02:56:39,206 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 02:56:39,206 INFO L85 PathProgramCache]: Analyzing trace with hash 1558277311, now seen corresponding path program 1 times [2024-11-14 02:56:39,213 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 02:56:39,214 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [809495414] [2024-11-14 02:56:39,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 02:56:39,214 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 02:56:39,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 02:56:39,459 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 02:56:39,459 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 02:56:39,460 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [809495414] [2024-11-14 02:56:39,461 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [809495414] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 02:56:39,461 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-14 02:56:39,464 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-14 02:56:39,466 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1057115166] [2024-11-14 02:56:39,467 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 02:56:39,470 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-14 02:56:39,473 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 02:56:39,495 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-14 02:56:39,496 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-14 02:56:39,498 INFO L87 Difference]: Start difference. First operand has 11 states, 9 states have (on average 1.7777777777777777) internal successors, (16), 10 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 02:56:39,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 02:56:39,563 INFO L93 Difference]: Finished difference Result 21 states and 31 transitions. [2024-11-14 02:56:39,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-14 02:56:39,566 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2024-11-14 02:56:39,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 02:56:39,573 INFO L225 Difference]: With dead ends: 21 [2024-11-14 02:56:39,573 INFO L226 Difference]: Without dead ends: 11 [2024-11-14 02:56:39,580 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-14 02:56:39,584 INFO L432 NwaCegarLoop]: 7 mSDtfsCounter, 0 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 14 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-14 02:56:39,585 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 14 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-14 02:56:39,598 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2024-11-14 02:56:39,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2024-11-14 02:56:39,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11 states, 10 states have (on average 1.5) internal successors, (15), 10 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 02:56:39,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 15 transitions. [2024-11-14 02:56:39,623 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 15 transitions. Word has length 7 [2024-11-14 02:56:39,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 02:56:39,625 INFO L471 AbstractCegarLoop]: Abstraction has 11 states and 15 transitions. [2024-11-14 02:56:39,626 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 02:56:39,626 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 15 transitions. [2024-11-14 02:56:39,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2024-11-14 02:56:39,627 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 02:56:39,627 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 02:56:39,627 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-14 02:56:39,627 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 02:56:39,628 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 02:56:39,628 INFO L85 PathProgramCache]: Analyzing trace with hash 1419396931, now seen corresponding path program 1 times [2024-11-14 02:56:39,628 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 02:56:39,628 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1378941812] [2024-11-14 02:56:39,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 02:56:39,628 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 02:56:39,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 02:56:39,709 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 02:56:39,709 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 02:56:39,709 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1378941812] [2024-11-14 02:56:39,710 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1378941812] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 02:56:39,710 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [118026122] [2024-11-14 02:56:39,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 02:56:39,710 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 02:56:39,710 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65bf2dd1-8840-45cc-86cd-4e637ac30725/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 02:56:39,712 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65bf2dd1-8840-45cc-86cd-4e637ac30725/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 02:56:39,715 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65bf2dd1-8840-45cc-86cd-4e637ac30725/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-14 02:56:39,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 02:56:39,804 INFO L255 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-11-14 02:56:39,807 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 02:56:39,844 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-14 02:56:39,844 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-14 02:56:39,844 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [118026122] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 02:56:39,844 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-14 02:56:39,844 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2024-11-14 02:56:39,845 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [843490000] [2024-11-14 02:56:39,845 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 02:56:39,846 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-14 02:56:39,846 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 02:56:39,846 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-14 02:56:39,847 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-14 02:56:39,847 INFO L87 Difference]: Start difference. First operand 11 states and 15 transitions. Second operand has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 02:56:39,878 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 02:56:39,878 INFO L93 Difference]: Finished difference Result 18 states and 24 transitions. [2024-11-14 02:56:39,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-14 02:56:39,878 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2024-11-14 02:56:39,878 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 02:56:39,879 INFO L225 Difference]: With dead ends: 18 [2024-11-14 02:56:39,879 INFO L226 Difference]: Without dead ends: 12 [2024-11-14 02:56:39,879 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-14 02:56:39,880 INFO L432 NwaCegarLoop]: 7 mSDtfsCounter, 0 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 14 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-14 02:56:39,880 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 14 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-14 02:56:39,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2024-11-14 02:56:39,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2024-11-14 02:56:39,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 11 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 02:56:39,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 16 transitions. [2024-11-14 02:56:39,883 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 16 transitions. Word has length 8 [2024-11-14 02:56:39,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 02:56:39,883 INFO L471 AbstractCegarLoop]: Abstraction has 12 states and 16 transitions. [2024-11-14 02:56:39,883 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 02:56:39,884 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 16 transitions. [2024-11-14 02:56:39,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2024-11-14 02:56:39,884 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 02:56:39,884 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 02:56:39,898 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65bf2dd1-8840-45cc-86cd-4e637ac30725/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-11-14 02:56:40,088 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65bf2dd1-8840-45cc-86cd-4e637ac30725/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 02:56:40,088 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 02:56:40,088 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 02:56:40,088 INFO L85 PathProgramCache]: Analyzing trace with hash 164227705, now seen corresponding path program 1 times [2024-11-14 02:56:40,089 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 02:56:40,089 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [81825034] [2024-11-14 02:56:40,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 02:56:40,089 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 02:56:40,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 02:56:40,216 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-14 02:56:40,217 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 02:56:40,217 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [81825034] [2024-11-14 02:56:40,217 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [81825034] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 02:56:40,217 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [469583092] [2024-11-14 02:56:40,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 02:56:40,217 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 02:56:40,217 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65bf2dd1-8840-45cc-86cd-4e637ac30725/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 02:56:40,221 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65bf2dd1-8840-45cc-86cd-4e637ac30725/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 02:56:40,224 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65bf2dd1-8840-45cc-86cd-4e637ac30725/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-14 02:56:40,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 02:56:40,303 INFO L255 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-11-14 02:56:40,304 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 02:56:40,317 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-14 02:56:40,317 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-14 02:56:40,317 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [469583092] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 02:56:40,317 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-14 02:56:40,317 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2024-11-14 02:56:40,317 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [602873365] [2024-11-14 02:56:40,318 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 02:56:40,318 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-14 02:56:40,318 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 02:56:40,319 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-14 02:56:40,319 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-14 02:56:40,319 INFO L87 Difference]: Start difference. First operand 12 states and 16 transitions. Second operand has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 02:56:40,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 02:56:40,343 INFO L93 Difference]: Finished difference Result 21 states and 29 transitions. [2024-11-14 02:56:40,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-14 02:56:40,345 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2024-11-14 02:56:40,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 02:56:40,345 INFO L225 Difference]: With dead ends: 21 [2024-11-14 02:56:40,345 INFO L226 Difference]: Without dead ends: 13 [2024-11-14 02:56:40,345 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-14 02:56:40,346 INFO L432 NwaCegarLoop]: 8 mSDtfsCounter, 0 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 15 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 02:56:40,346 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 15 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-14 02:56:40,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2024-11-14 02:56:40,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2024-11-14 02:56:40,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13 states, 12 states have (on average 1.4166666666666667) internal successors, (17), 12 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 02:56:40,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 17 transitions. [2024-11-14 02:56:40,352 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 17 transitions. Word has length 10 [2024-11-14 02:56:40,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 02:56:40,353 INFO L471 AbstractCegarLoop]: Abstraction has 13 states and 17 transitions. [2024-11-14 02:56:40,353 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 02:56:40,353 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 17 transitions. [2024-11-14 02:56:40,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2024-11-14 02:56:40,353 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 02:56:40,353 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 02:56:40,375 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65bf2dd1-8840-45cc-86cd-4e637ac30725/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-11-14 02:56:40,558 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65bf2dd1-8840-45cc-86cd-4e637ac30725/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 02:56:40,559 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 02:56:40,559 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 02:56:40,559 INFO L85 PathProgramCache]: Analyzing trace with hash -745506197, now seen corresponding path program 1 times [2024-11-14 02:56:40,559 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 02:56:40,559 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2050028886] [2024-11-14 02:56:40,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 02:56:40,560 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 02:56:40,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 02:56:40,678 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-14 02:56:40,678 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 02:56:40,678 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2050028886] [2024-11-14 02:56:40,678 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2050028886] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 02:56:40,678 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [571688746] [2024-11-14 02:56:40,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 02:56:40,679 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 02:56:40,679 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65bf2dd1-8840-45cc-86cd-4e637ac30725/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 02:56:40,681 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65bf2dd1-8840-45cc-86cd-4e637ac30725/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 02:56:40,696 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65bf2dd1-8840-45cc-86cd-4e637ac30725/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-14 02:56:40,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 02:56:40,761 INFO L255 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-11-14 02:56:40,762 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 02:56:40,793 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-14 02:56:40,793 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 02:56:40,820 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-14 02:56:40,820 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [571688746] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 02:56:40,820 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [960864269] [2024-11-14 02:56:40,837 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2024-11-14 02:56:40,838 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 02:56:40,840 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 02:56:40,844 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 02:56:40,845 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 02:56:41,399 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 02:56:41,594 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '292#(and (<= 1 |#StackHeapBarrier|) (<= (+ (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) 4) 1) (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) 0)) (= |ULTIMATE.start_main_~y~0#1| 1) (<= 2 |ULTIMATE.start_main_~#a~0#1.base|) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |ULTIMATE.start_main_~x~0#1| 0))' at error location [2024-11-14 02:56:41,595 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 02:56:41,595 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 02:56:41,595 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2024-11-14 02:56:41,595 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1607018829] [2024-11-14 02:56:41,595 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 02:56:41,595 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-14 02:56:41,596 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 02:56:41,596 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-14 02:56:41,597 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2024-11-14 02:56:41,597 INFO L87 Difference]: Start difference. First operand 13 states and 17 transitions. Second operand has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 6 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 02:56:41,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 02:56:41,646 INFO L93 Difference]: Finished difference Result 26 states and 36 transitions. [2024-11-14 02:56:41,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-14 02:56:41,647 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 6 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2024-11-14 02:56:41,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 02:56:41,647 INFO L225 Difference]: With dead ends: 26 [2024-11-14 02:56:41,648 INFO L226 Difference]: Without dead ends: 16 [2024-11-14 02:56:41,648 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2024-11-14 02:56:41,649 INFO L432 NwaCegarLoop]: 7 mSDtfsCounter, 0 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-14 02:56:41,650 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 28 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-14 02:56:41,651 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2024-11-14 02:56:41,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2024-11-14 02:56:41,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 15 states have (on average 1.3333333333333333) internal successors, (20), 15 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 02:56:41,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 20 transitions. [2024-11-14 02:56:41,657 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 20 transitions. Word has length 11 [2024-11-14 02:56:41,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 02:56:41,659 INFO L471 AbstractCegarLoop]: Abstraction has 16 states and 20 transitions. [2024-11-14 02:56:41,659 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 6 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 02:56:41,659 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 20 transitions. [2024-11-14 02:56:41,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2024-11-14 02:56:41,660 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 02:56:41,660 INFO L215 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 02:56:41,679 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65bf2dd1-8840-45cc-86cd-4e637ac30725/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-11-14 02:56:41,863 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65bf2dd1-8840-45cc-86cd-4e637ac30725/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 02:56:41,864 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 02:56:41,864 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 02:56:41,864 INFO L85 PathProgramCache]: Analyzing trace with hash -697077137, now seen corresponding path program 2 times [2024-11-14 02:56:41,864 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 02:56:41,864 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1566899071] [2024-11-14 02:56:41,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 02:56:41,865 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 02:56:41,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 02:56:41,951 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-11-14 02:56:41,951 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 02:56:41,951 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1566899071] [2024-11-14 02:56:41,951 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1566899071] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 02:56:41,951 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [226088281] [2024-11-14 02:56:41,951 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-14 02:56:41,954 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 02:56:41,954 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65bf2dd1-8840-45cc-86cd-4e637ac30725/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 02:56:41,956 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65bf2dd1-8840-45cc-86cd-4e637ac30725/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 02:56:41,958 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65bf2dd1-8840-45cc-86cd-4e637ac30725/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-14 02:56:42,041 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-11-14 02:56:42,041 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 02:56:42,044 INFO L255 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-14 02:56:42,045 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 02:56:42,103 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-14 02:56:42,106 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 02:56:42,195 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-14 02:56:42,195 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [226088281] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 02:56:42,195 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1017693174] [2024-11-14 02:56:42,197 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2024-11-14 02:56:42,197 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 02:56:42,197 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 02:56:42,197 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 02:56:42,197 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 02:56:42,480 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 02:56:42,676 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '461#(and (<= 1 |#StackHeapBarrier|) (<= (+ (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) 4) 1) (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) 0)) (= |ULTIMATE.start_main_~y~0#1| 1) (<= 2 |ULTIMATE.start_main_~#a~0#1.base|) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |ULTIMATE.start_main_~x~0#1| 0))' at error location [2024-11-14 02:56:42,677 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 02:56:42,677 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 02:56:42,677 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 6, 6] total 14 [2024-11-14 02:56:42,677 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [307376247] [2024-11-14 02:56:42,677 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 02:56:42,678 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-11-14 02:56:42,678 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 02:56:42,678 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-11-14 02:56:42,679 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=329, Unknown=0, NotChecked=0, Total=420 [2024-11-14 02:56:42,679 INFO L87 Difference]: Start difference. First operand 16 states and 20 transitions. Second operand has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 02:56:42,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 02:56:42,724 INFO L93 Difference]: Finished difference Result 33 states and 47 transitions. [2024-11-14 02:56:42,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-11-14 02:56:42,725 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2024-11-14 02:56:42,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 02:56:42,725 INFO L225 Difference]: With dead ends: 33 [2024-11-14 02:56:42,726 INFO L226 Difference]: Without dead ends: 23 [2024-11-14 02:56:42,726 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=91, Invalid=329, Unknown=0, NotChecked=0, Total=420 [2024-11-14 02:56:42,727 INFO L432 NwaCegarLoop]: 7 mSDtfsCounter, 0 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-14 02:56:42,727 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 34 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-14 02:56:42,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2024-11-14 02:56:42,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2024-11-14 02:56:42,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 22 states have (on average 1.2272727272727273) internal successors, (27), 22 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 02:56:42,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 27 transitions. [2024-11-14 02:56:42,735 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 27 transitions. Word has length 14 [2024-11-14 02:56:42,735 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 02:56:42,736 INFO L471 AbstractCegarLoop]: Abstraction has 23 states and 27 transitions. [2024-11-14 02:56:42,736 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 02:56:42,736 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 27 transitions. [2024-11-14 02:56:42,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2024-11-14 02:56:42,737 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 02:56:42,737 INFO L215 NwaCegarLoop]: trace histogram [10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 02:56:42,756 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65bf2dd1-8840-45cc-86cd-4e637ac30725/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-11-14 02:56:42,937 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65bf2dd1-8840-45cc-86cd-4e637ac30725/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 02:56:42,938 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 02:56:42,938 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 02:56:42,938 INFO L85 PathProgramCache]: Analyzing trace with hash 584188597, now seen corresponding path program 3 times [2024-11-14 02:56:42,938 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 02:56:42,938 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2124390355] [2024-11-14 02:56:42,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 02:56:42,938 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 02:56:42,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 02:56:43,088 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2024-11-14 02:56:43,089 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 02:56:43,089 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2124390355] [2024-11-14 02:56:43,089 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2124390355] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 02:56:43,089 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2034891117] [2024-11-14 02:56:43,089 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-14 02:56:43,089 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 02:56:43,089 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65bf2dd1-8840-45cc-86cd-4e637ac30725/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 02:56:43,091 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65bf2dd1-8840-45cc-86cd-4e637ac30725/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 02:56:43,093 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65bf2dd1-8840-45cc-86cd-4e637ac30725/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-14 02:56:43,187 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-14 02:56:43,187 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 02:56:43,189 INFO L255 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-11-14 02:56:43,190 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 02:56:43,353 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-14 02:56:43,353 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 02:56:43,669 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-14 02:56:43,669 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2034891117] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 02:56:43,669 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [560493651] [2024-11-14 02:56:43,671 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2024-11-14 02:56:43,672 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 02:56:43,673 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 02:56:43,673 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 02:56:43,673 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 02:56:43,885 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 02:56:44,132 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '713#(and (<= 1 |#StackHeapBarrier|) (<= (+ (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) 4) 1) (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) 0)) (= |ULTIMATE.start_main_~y~0#1| 1) (<= 2 |ULTIMATE.start_main_~#a~0#1.base|) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |ULTIMATE.start_main_~x~0#1| 0))' at error location [2024-11-14 02:56:44,132 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 02:56:44,133 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 02:56:44,133 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 12, 12] total 27 [2024-11-14 02:56:44,134 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1314557745] [2024-11-14 02:56:44,134 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 02:56:44,134 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2024-11-14 02:56:44,134 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 02:56:44,135 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2024-11-14 02:56:44,136 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=305, Invalid=817, Unknown=0, NotChecked=0, Total=1122 [2024-11-14 02:56:44,136 INFO L87 Difference]: Start difference. First operand 23 states and 27 transitions. Second operand has 27 states, 27 states have (on average 1.4444444444444444) internal successors, (39), 27 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 02:56:44,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 02:56:44,216 INFO L93 Difference]: Finished difference Result 47 states and 67 transitions. [2024-11-14 02:56:44,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2024-11-14 02:56:44,217 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.4444444444444444) internal successors, (39), 27 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2024-11-14 02:56:44,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 02:56:44,218 INFO L225 Difference]: With dead ends: 47 [2024-11-14 02:56:44,219 INFO L226 Difference]: Without dead ends: 36 [2024-11-14 02:56:44,220 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 280 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=305, Invalid=817, Unknown=0, NotChecked=0, Total=1122 [2024-11-14 02:56:44,221 INFO L432 NwaCegarLoop]: 7 mSDtfsCounter, 0 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 60 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-14 02:56:44,222 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 40 Invalid, 60 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 59 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-14 02:56:44,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2024-11-14 02:56:44,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2024-11-14 02:56:44,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 35 states have (on average 1.1428571428571428) internal successors, (40), 35 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 02:56:44,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 40 transitions. [2024-11-14 02:56:44,231 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 40 transitions. Word has length 21 [2024-11-14 02:56:44,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 02:56:44,232 INFO L471 AbstractCegarLoop]: Abstraction has 36 states and 40 transitions. [2024-11-14 02:56:44,232 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.4444444444444444) internal successors, (39), 27 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 02:56:44,232 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 40 transitions. [2024-11-14 02:56:44,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2024-11-14 02:56:44,233 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 02:56:44,233 INFO L215 NwaCegarLoop]: trace histogram [22, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 02:56:44,253 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65bf2dd1-8840-45cc-86cd-4e637ac30725/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-11-14 02:56:44,434 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65bf2dd1-8840-45cc-86cd-4e637ac30725/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 02:56:44,434 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 02:56:44,434 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 02:56:44,434 INFO L85 PathProgramCache]: Analyzing trace with hash 1961952943, now seen corresponding path program 4 times [2024-11-14 02:56:44,434 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 02:56:44,435 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [246613750] [2024-11-14 02:56:44,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 02:56:44,435 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 02:56:44,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 02:56:45,379 INFO L134 CoverageAnalysis]: Checked inductivity of 260 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-11-14 02:56:45,379 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 02:56:45,379 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [246613750] [2024-11-14 02:56:45,379 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [246613750] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 02:56:45,379 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2027624957] [2024-11-14 02:56:45,380 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-14 02:56:45,380 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 02:56:45,380 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65bf2dd1-8840-45cc-86cd-4e637ac30725/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 02:56:45,383 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65bf2dd1-8840-45cc-86cd-4e637ac30725/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 02:56:45,385 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65bf2dd1-8840-45cc-86cd-4e637ac30725/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-14 02:56:45,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 02:56:45,534 INFO L255 TraceCheckSpWp]: Trace formula consists of 284 conjuncts, 24 conjuncts are in the unsatisfiable core [2024-11-14 02:56:45,537 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 02:56:45,603 INFO L134 CoverageAnalysis]: Checked inductivity of 260 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-11-14 02:56:45,603 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 02:56:46,570 INFO L134 CoverageAnalysis]: Checked inductivity of 260 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-11-14 02:56:46,571 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2027624957] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 02:56:46,571 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2002476411] [2024-11-14 02:56:46,573 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2024-11-14 02:56:46,573 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 02:56:46,573 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 02:56:46,573 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 02:56:46,574 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 02:56:46,751 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 02:56:47,030 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1119#(and (<= 1 |#StackHeapBarrier|) (<= (+ (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) 4) 1) (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) 0)) (= |ULTIMATE.start_main_~y~0#1| 1) (<= 2 |ULTIMATE.start_main_~#a~0#1.base|) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |ULTIMATE.start_main_~x~0#1| 0))' at error location [2024-11-14 02:56:47,030 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 02:56:47,031 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 02:56:47,031 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24, 24] total 48 [2024-11-14 02:56:47,031 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [227157135] [2024-11-14 02:56:47,031 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 02:56:47,032 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2024-11-14 02:56:47,033 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 02:56:47,034 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2024-11-14 02:56:47,036 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1196, Invalid=1884, Unknown=0, NotChecked=0, Total=3080 [2024-11-14 02:56:47,037 INFO L87 Difference]: Start difference. First operand 36 states and 40 transitions. Second operand has 49 states, 49 states have (on average 1.183673469387755) internal successors, (58), 48 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 02:56:47,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 02:56:47,172 INFO L93 Difference]: Finished difference Result 72 states and 103 transitions. [2024-11-14 02:56:47,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2024-11-14 02:56:47,173 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 1.183673469387755) internal successors, (58), 48 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2024-11-14 02:56:47,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 02:56:47,175 INFO L225 Difference]: With dead ends: 72 [2024-11-14 02:56:47,176 INFO L226 Difference]: Without dead ends: 60 [2024-11-14 02:56:47,177 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 576 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1196, Invalid=1884, Unknown=0, NotChecked=0, Total=3080 [2024-11-14 02:56:47,179 INFO L432 NwaCegarLoop]: 7 mSDtfsCounter, 0 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 84 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 85 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 84 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-14 02:56:47,181 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 49 Invalid, 85 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 84 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-14 02:56:47,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2024-11-14 02:56:47,188 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2024-11-14 02:56:47,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 59 states have (on average 1.0847457627118644) internal successors, (64), 59 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 02:56:47,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 64 transitions. [2024-11-14 02:56:47,189 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 64 transitions. Word has length 34 [2024-11-14 02:56:47,189 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 02:56:47,190 INFO L471 AbstractCegarLoop]: Abstraction has 60 states and 64 transitions. [2024-11-14 02:56:47,190 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 1.183673469387755) internal successors, (58), 48 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 02:56:47,190 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 64 transitions. [2024-11-14 02:56:47,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2024-11-14 02:56:47,191 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 02:56:47,191 INFO L215 NwaCegarLoop]: trace histogram [46, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 02:56:47,212 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65bf2dd1-8840-45cc-86cd-4e637ac30725/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2024-11-14 02:56:47,396 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65bf2dd1-8840-45cc-86cd-4e637ac30725/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2024-11-14 02:56:47,396 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 02:56:47,396 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 02:56:47,396 INFO L85 PathProgramCache]: Analyzing trace with hash 326221999, now seen corresponding path program 5 times [2024-11-14 02:56:47,397 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 02:56:47,397 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1332871913] [2024-11-14 02:56:47,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 02:56:47,397 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 02:56:47,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 02:56:50,067 INFO L134 CoverageAnalysis]: Checked inductivity of 1088 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-11-14 02:56:50,067 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 02:56:50,067 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1332871913] [2024-11-14 02:56:50,068 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1332871913] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 02:56:50,068 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [787900532] [2024-11-14 02:56:50,068 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-14 02:56:50,068 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 02:56:50,068 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65bf2dd1-8840-45cc-86cd-4e637ac30725/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 02:56:50,070 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65bf2dd1-8840-45cc-86cd-4e637ac30725/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 02:56:50,072 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65bf2dd1-8840-45cc-86cd-4e637ac30725/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-14 02:56:50,210 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-11-14 02:56:50,211 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 02:56:50,212 INFO L255 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-11-14 02:56:50,214 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 02:56:50,345 INFO L134 CoverageAnalysis]: Checked inductivity of 1088 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 1081 trivial. 0 not checked. [2024-11-14 02:56:50,345 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 02:56:50,483 INFO L134 CoverageAnalysis]: Checked inductivity of 1088 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 1081 trivial. 0 not checked. [2024-11-14 02:56:50,483 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [787900532] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 02:56:50,484 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1519949286] [2024-11-14 02:56:50,485 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2024-11-14 02:56:50,486 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 02:56:50,486 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 02:56:50,486 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 02:56:50,486 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 02:56:50,627 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 02:56:51,058 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1775#(and (<= 1 |#StackHeapBarrier|) (<= (+ (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) 4) 1) (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) 0)) (= |ULTIMATE.start_main_~y~0#1| 1) (<= 2 |ULTIMATE.start_main_~#a~0#1.base|) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |ULTIMATE.start_main_~x~0#1| 0))' at error location [2024-11-14 02:56:51,059 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 02:56:51,059 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 02:56:51,059 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 6, 6] total 57 [2024-11-14 02:56:51,059 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1655860631] [2024-11-14 02:56:51,059 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 02:56:51,062 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2024-11-14 02:56:51,063 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 02:56:51,064 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2024-11-14 02:56:51,066 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1240, Invalid=2792, Unknown=0, NotChecked=0, Total=4032 [2024-11-14 02:56:51,068 INFO L87 Difference]: Start difference. First operand 60 states and 64 transitions. Second operand has 57 states, 57 states have (on average 1.2105263157894737) internal successors, (69), 57 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 02:56:51,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 02:56:51,182 INFO L93 Difference]: Finished difference Result 78 states and 91 transitions. [2024-11-14 02:56:51,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2024-11-14 02:56:51,183 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 57 states have (on average 1.2105263157894737) internal successors, (69), 57 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 58 [2024-11-14 02:56:51,184 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 02:56:51,185 INFO L225 Difference]: With dead ends: 78 [2024-11-14 02:56:51,188 INFO L226 Difference]: Without dead ends: 66 [2024-11-14 02:56:51,190 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 220 GetRequests, 158 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 765 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=1240, Invalid=2792, Unknown=0, NotChecked=0, Total=4032 [2024-11-14 02:56:51,191 INFO L432 NwaCegarLoop]: 7 mSDtfsCounter, 0 mSDsluCounter, 61 mSDsCounter, 0 mSdLazyCounter, 109 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 110 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 109 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-14 02:56:51,191 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 68 Invalid, 110 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 109 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-14 02:56:51,192 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2024-11-14 02:56:51,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 66. [2024-11-14 02:56:51,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 65 states have (on average 1.0769230769230769) internal successors, (70), 65 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 02:56:51,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 70 transitions. [2024-11-14 02:56:51,205 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 70 transitions. Word has length 58 [2024-11-14 02:56:51,205 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 02:56:51,205 INFO L471 AbstractCegarLoop]: Abstraction has 66 states and 70 transitions. [2024-11-14 02:56:51,205 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 57 states, 57 states have (on average 1.2105263157894737) internal successors, (69), 57 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 02:56:51,206 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 70 transitions. [2024-11-14 02:56:51,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2024-11-14 02:56:51,206 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 02:56:51,207 INFO L215 NwaCegarLoop]: trace histogram [47, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 02:56:51,225 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65bf2dd1-8840-45cc-86cd-4e637ac30725/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-11-14 02:56:51,407 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65bf2dd1-8840-45cc-86cd-4e637ac30725/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2024-11-14 02:56:51,407 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 02:56:51,407 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 02:56:51,407 INFO L85 PathProgramCache]: Analyzing trace with hash 1103869945, now seen corresponding path program 6 times [2024-11-14 02:56:51,407 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 02:56:51,408 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [496188210] [2024-11-14 02:56:51,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 02:56:51,408 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 02:56:51,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 02:56:53,741 INFO L134 CoverageAnalysis]: Checked inductivity of 1165 backedges. 0 proven. 1128 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2024-11-14 02:56:53,742 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 02:56:53,742 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [496188210] [2024-11-14 02:56:53,742 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [496188210] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 02:56:53,742 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1212430495] [2024-11-14 02:56:53,742 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-14 02:56:53,742 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 02:56:53,742 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65bf2dd1-8840-45cc-86cd-4e637ac30725/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 02:56:53,745 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65bf2dd1-8840-45cc-86cd-4e637ac30725/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 02:56:53,747 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65bf2dd1-8840-45cc-86cd-4e637ac30725/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-14 02:56:53,966 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-14 02:56:53,966 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 02:56:53,971 INFO L255 TraceCheckSpWp]: Trace formula consists of 554 conjuncts, 49 conjuncts are in the unsatisfiable core [2024-11-14 02:56:53,975 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 02:56:54,100 INFO L134 CoverageAnalysis]: Checked inductivity of 1165 backedges. 0 proven. 1128 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2024-11-14 02:56:54,100 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 02:56:57,223 INFO L134 CoverageAnalysis]: Checked inductivity of 1165 backedges. 0 proven. 1128 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2024-11-14 02:56:57,223 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1212430495] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 02:56:57,223 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [931931621] [2024-11-14 02:56:57,225 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2024-11-14 02:56:57,225 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 02:56:57,226 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 02:56:57,226 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 02:56:57,226 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 02:56:57,369 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 02:56:57,740 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2533#(and (<= 1 |#StackHeapBarrier|) (<= (+ (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) 4) 1) (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) 0)) (= |ULTIMATE.start_main_~y~0#1| 1) (<= 2 |ULTIMATE.start_main_~#a~0#1.base|) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |ULTIMATE.start_main_~x~0#1| 0))' at error location [2024-11-14 02:56:57,740 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 02:56:57,740 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 02:56:57,740 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 49, 49] total 98 [2024-11-14 02:56:57,740 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1312696661] [2024-11-14 02:56:57,740 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 02:56:57,741 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 99 states [2024-11-14 02:56:57,741 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 02:56:57,743 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 99 interpolants. [2024-11-14 02:56:57,745 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4871, Invalid=6259, Unknown=0, NotChecked=0, Total=11130 [2024-11-14 02:56:57,746 INFO L87 Difference]: Start difference. First operand 66 states and 70 transitions. Second operand has 99 states, 99 states have (on average 1.0909090909090908) internal successors, (108), 98 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 02:56:57,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 02:56:57,947 INFO L93 Difference]: Finished difference Result 132 states and 188 transitions. [2024-11-14 02:56:57,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 98 states. [2024-11-14 02:56:57,948 INFO L78 Accepts]: Start accepts. Automaton has has 99 states, 99 states have (on average 1.0909090909090908) internal successors, (108), 98 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 64 [2024-11-14 02:56:57,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 02:56:57,949 INFO L225 Difference]: With dead ends: 132 [2024-11-14 02:56:57,949 INFO L226 Difference]: Without dead ends: 115 [2024-11-14 02:56:57,952 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 239 GetRequests, 135 SyntacticMatches, 0 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1201 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=4871, Invalid=6259, Unknown=0, NotChecked=0, Total=11130 [2024-11-14 02:56:57,953 INFO L432 NwaCegarLoop]: 7 mSDtfsCounter, 0 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 133 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 134 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 133 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-14 02:56:57,953 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 49 Invalid, 134 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 133 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-14 02:56:57,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2024-11-14 02:56:57,962 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 115. [2024-11-14 02:56:57,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 114 states have (on average 1.043859649122807) internal successors, (119), 114 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 02:56:57,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 119 transitions. [2024-11-14 02:56:57,964 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 119 transitions. Word has length 64 [2024-11-14 02:56:57,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 02:56:57,966 INFO L471 AbstractCegarLoop]: Abstraction has 115 states and 119 transitions. [2024-11-14 02:56:57,966 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 99 states, 99 states have (on average 1.0909090909090908) internal successors, (108), 98 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 02:56:57,966 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 119 transitions. [2024-11-14 02:56:57,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2024-11-14 02:56:57,969 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 02:56:57,969 INFO L215 NwaCegarLoop]: trace histogram [96, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 02:56:57,988 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65bf2dd1-8840-45cc-86cd-4e637ac30725/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-11-14 02:56:58,172 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65bf2dd1-8840-45cc-86cd-4e637ac30725/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 02:56:58,173 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 02:56:58,173 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 02:56:58,173 INFO L85 PathProgramCache]: Analyzing trace with hash -2103306763, now seen corresponding path program 7 times [2024-11-14 02:56:58,173 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 02:56:58,173 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2103300062] [2024-11-14 02:56:58,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 02:56:58,173 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 02:56:58,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 02:57:05,310 INFO L134 CoverageAnalysis]: Checked inductivity of 4693 backedges. 0 proven. 4656 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2024-11-14 02:57:05,310 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 02:57:05,311 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2103300062] [2024-11-14 02:57:05,311 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2103300062] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 02:57:05,311 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [486677193] [2024-11-14 02:57:05,311 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-14 02:57:05,311 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 02:57:05,311 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65bf2dd1-8840-45cc-86cd-4e637ac30725/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 02:57:05,313 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65bf2dd1-8840-45cc-86cd-4e637ac30725/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 02:57:05,314 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65bf2dd1-8840-45cc-86cd-4e637ac30725/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-11-14 02:57:05,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 02:57:05,696 INFO L255 TraceCheckSpWp]: Trace formula consists of 995 conjuncts, 98 conjuncts are in the unsatisfiable core [2024-11-14 02:57:05,705 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 02:57:05,911 INFO L134 CoverageAnalysis]: Checked inductivity of 4693 backedges. 0 proven. 4656 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2024-11-14 02:57:05,911 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 02:57:17,611 INFO L134 CoverageAnalysis]: Checked inductivity of 4693 backedges. 0 proven. 4656 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2024-11-14 02:57:17,611 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [486677193] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 02:57:17,611 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1439130220] [2024-11-14 02:57:17,613 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2024-11-14 02:57:17,613 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 02:57:17,613 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 02:57:17,613 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 02:57:17,613 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 02:57:17,776 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 02:57:18,293 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3889#(and (<= 1 |#StackHeapBarrier|) (<= (+ (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) 4) 1) (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) 0)) (= |ULTIMATE.start_main_~y~0#1| 1) (<= 2 |ULTIMATE.start_main_~#a~0#1.base|) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |ULTIMATE.start_main_~x~0#1| 0))' at error location [2024-11-14 02:57:18,293 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 02:57:18,293 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 02:57:18,294 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [98, 98, 98] total 196 [2024-11-14 02:57:18,294 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [505939794] [2024-11-14 02:57:18,294 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 02:57:18,294 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 197 states [2024-11-14 02:57:18,294 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 02:57:18,302 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 197 interpolants. [2024-11-14 02:57:18,306 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19326, Invalid=22086, Unknown=0, NotChecked=0, Total=41412 [2024-11-14 02:57:18,306 INFO L87 Difference]: Start difference. First operand 115 states and 119 transitions. Second operand has 197 states, 197 states have (on average 1.0456852791878173) internal successors, (206), 196 states have internal predecessors, (206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 02:57:18,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 02:57:18,777 INFO L93 Difference]: Finished difference Result 230 states and 335 transitions. [2024-11-14 02:57:18,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 196 states. [2024-11-14 02:57:18,778 INFO L78 Accepts]: Start accepts. Automaton has has 197 states, 197 states have (on average 1.0456852791878173) internal successors, (206), 196 states have internal predecessors, (206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 113 [2024-11-14 02:57:18,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 02:57:18,781 INFO L225 Difference]: With dead ends: 230 [2024-11-14 02:57:18,781 INFO L226 Difference]: Without dead ends: 213 [2024-11-14 02:57:18,785 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 435 GetRequests, 233 SyntacticMatches, 0 SemanticMatches, 202 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2426 ImplicationChecksByTransitivity, 16.1s TimeCoverageRelationStatistics Valid=19326, Invalid=22086, Unknown=0, NotChecked=0, Total=41412 [2024-11-14 02:57:18,786 INFO L432 NwaCegarLoop]: 7 mSDtfsCounter, 0 mSDsluCounter, 49 mSDsCounter, 0 mSdLazyCounter, 237 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 238 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 237 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-14 02:57:18,786 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 56 Invalid, 238 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 237 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-14 02:57:18,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 213 states. [2024-11-14 02:57:18,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 213 to 213. [2024-11-14 02:57:18,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 213 states, 212 states have (on average 1.0235849056603774) internal successors, (217), 212 states have internal predecessors, (217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 02:57:18,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 213 states to 213 states and 217 transitions. [2024-11-14 02:57:18,809 INFO L78 Accepts]: Start accepts. Automaton has 213 states and 217 transitions. Word has length 113 [2024-11-14 02:57:18,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 02:57:18,809 INFO L471 AbstractCegarLoop]: Abstraction has 213 states and 217 transitions. [2024-11-14 02:57:18,810 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 197 states, 197 states have (on average 1.0456852791878173) internal successors, (206), 196 states have internal predecessors, (206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 02:57:18,810 INFO L276 IsEmpty]: Start isEmpty. Operand 213 states and 217 transitions. [2024-11-14 02:57:18,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 212 [2024-11-14 02:57:18,814 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 02:57:18,814 INFO L215 NwaCegarLoop]: trace histogram [194, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 02:57:18,835 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65bf2dd1-8840-45cc-86cd-4e637ac30725/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2024-11-14 02:57:19,014 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65bf2dd1-8840-45cc-86cd-4e637ac30725/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2024-11-14 02:57:19,015 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 02:57:19,015 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 02:57:19,015 INFO L85 PathProgramCache]: Analyzing trace with hash 1707794037, now seen corresponding path program 8 times [2024-11-14 02:57:19,015 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 02:57:19,015 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [818571539] [2024-11-14 02:57:19,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 02:57:19,015 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 02:57:19,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 02:57:42,330 INFO L134 CoverageAnalysis]: Checked inductivity of 18952 backedges. 0 proven. 18915 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2024-11-14 02:57:42,330 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 02:57:42,330 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [818571539] [2024-11-14 02:57:42,330 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [818571539] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 02:57:42,330 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [99510048] [2024-11-14 02:57:42,330 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-14 02:57:42,330 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 02:57:42,331 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65bf2dd1-8840-45cc-86cd-4e637ac30725/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 02:57:42,332 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65bf2dd1-8840-45cc-86cd-4e637ac30725/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 02:57:42,333 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65bf2dd1-8840-45cc-86cd-4e637ac30725/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-11-14 02:57:42,807 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2024-11-14 02:57:42,807 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 02:57:42,810 INFO L255 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-11-14 02:57:42,814 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 02:57:43,600 INFO L134 CoverageAnalysis]: Checked inductivity of 18952 backedges. 1 proven. 36 refuted. 0 times theorem prover too weak. 18915 trivial. 0 not checked. [2024-11-14 02:57:43,601 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 02:57:44,451 INFO L134 CoverageAnalysis]: Checked inductivity of 18952 backedges. 1 proven. 36 refuted. 0 times theorem prover too weak. 18915 trivial. 0 not checked. [2024-11-14 02:57:44,451 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [99510048] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 02:57:44,451 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [824820070] [2024-11-14 02:57:44,453 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2024-11-14 02:57:44,453 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 02:57:44,453 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 02:57:44,453 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 02:57:44,453 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 02:57:44,600 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 02:57:45,538 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '6243#(and (<= 1 |#StackHeapBarrier|) (<= (+ (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) 4) 1) (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) 0)) (= |ULTIMATE.start_main_~y~0#1| 1) (<= 2 |ULTIMATE.start_main_~#a~0#1.base|) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |ULTIMATE.start_main_~x~0#1| 0))' at error location [2024-11-14 02:57:45,538 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 02:57:45,539 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 02:57:45,539 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [196, 11, 11] total 215 [2024-11-14 02:57:45,539 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [40255603] [2024-11-14 02:57:45,539 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 02:57:45,540 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 215 states [2024-11-14 02:57:45,540 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 02:57:45,545 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 215 interpolants. [2024-11-14 02:57:45,548 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19515, Invalid=29547, Unknown=0, NotChecked=0, Total=49062 [2024-11-14 02:57:45,549 INFO L87 Difference]: Start difference. First operand 213 states and 217 transitions. Second operand has 215 states, 215 states have (on average 1.0558139534883721) internal successors, (227), 215 states have internal predecessors, (227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 02:57:46,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 02:57:46,114 INFO L93 Difference]: Finished difference Result 241 states and 259 transitions. [2024-11-14 02:57:46,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 215 states. [2024-11-14 02:57:46,116 INFO L78 Accepts]: Start accepts. Automaton has has 215 states, 215 states have (on average 1.0558139534883721) internal successors, (227), 215 states have internal predecessors, (227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 211 [2024-11-14 02:57:46,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 02:57:46,119 INFO L225 Difference]: With dead ends: 241 [2024-11-14 02:57:46,119 INFO L226 Difference]: Without dead ends: 224 [2024-11-14 02:57:46,122 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 827 GetRequests, 607 SyntacticMatches, 0 SemanticMatches, 220 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5030 ImplicationChecksByTransitivity, 17.9s TimeCoverageRelationStatistics Valid=19515, Invalid=29547, Unknown=0, NotChecked=0, Total=49062 [2024-11-14 02:57:46,122 INFO L432 NwaCegarLoop]: 7 mSDtfsCounter, 0 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 276 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 71 SdHoareTripleChecker+Invalid, 277 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 276 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-14 02:57:46,122 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 71 Invalid, 277 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 276 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-14 02:57:46,123 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 224 states. [2024-11-14 02:57:46,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 224 to 224. [2024-11-14 02:57:46,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 224 states, 223 states have (on average 1.0224215246636772) internal successors, (228), 223 states have internal predecessors, (228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 02:57:46,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 228 transitions. [2024-11-14 02:57:46,159 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 228 transitions. Word has length 211 [2024-11-14 02:57:46,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 02:57:46,159 INFO L471 AbstractCegarLoop]: Abstraction has 224 states and 228 transitions. [2024-11-14 02:57:46,160 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 215 states, 215 states have (on average 1.0558139534883721) internal successors, (227), 215 states have internal predecessors, (227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 02:57:46,160 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 228 transitions. [2024-11-14 02:57:46,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 223 [2024-11-14 02:57:46,162 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 02:57:46,162 INFO L215 NwaCegarLoop]: trace histogram [195, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 02:57:46,188 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65bf2dd1-8840-45cc-86cd-4e637ac30725/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2024-11-14 02:57:46,367 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65bf2dd1-8840-45cc-86cd-4e637ac30725/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 02:57:46,367 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 02:57:46,367 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 02:57:46,367 INFO L85 PathProgramCache]: Analyzing trace with hash -1276548551, now seen corresponding path program 9 times [2024-11-14 02:57:46,367 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 02:57:46,367 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [863435185] [2024-11-14 02:57:46,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 02:57:46,368 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 02:57:46,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 02:58:09,554 INFO L134 CoverageAnalysis]: Checked inductivity of 19282 backedges. 0 proven. 19110 refuted. 0 times theorem prover too weak. 172 trivial. 0 not checked. [2024-11-14 02:58:09,554 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 02:58:09,554 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [863435185] [2024-11-14 02:58:09,554 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [863435185] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 02:58:09,554 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [904286291] [2024-11-14 02:58:09,555 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-14 02:58:09,555 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 02:58:09,555 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65bf2dd1-8840-45cc-86cd-4e637ac30725/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 02:58:09,557 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65bf2dd1-8840-45cc-86cd-4e637ac30725/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 02:58:09,558 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65bf2dd1-8840-45cc-86cd-4e637ac30725/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-11-14 02:58:10,259 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-14 02:58:10,259 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 02:58:10,273 INFO L255 TraceCheckSpWp]: Trace formula consists of 1976 conjuncts, 197 conjuncts are in the unsatisfiable core [2024-11-14 02:58:10,283 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 02:58:10,600 INFO L134 CoverageAnalysis]: Checked inductivity of 19282 backedges. 0 proven. 19110 refuted. 0 times theorem prover too weak. 172 trivial. 0 not checked. [2024-11-14 02:58:10,600 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 02:58:58,117 INFO L134 CoverageAnalysis]: Checked inductivity of 19282 backedges. 0 proven. 19110 refuted. 0 times theorem prover too weak. 172 trivial. 0 not checked. [2024-11-14 02:58:58,118 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [904286291] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 02:58:58,118 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [802893692] [2024-11-14 02:58:58,120 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2024-11-14 02:58:58,120 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 02:58:58,121 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 02:58:58,121 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 02:58:58,121 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 02:58:58,296 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 02:58:59,207 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '8887#(and (<= 1 |#StackHeapBarrier|) (<= (+ (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) 4) 1) (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) 0)) (= |ULTIMATE.start_main_~y~0#1| 1) (<= 2 |ULTIMATE.start_main_~#a~0#1.base|) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |ULTIMATE.start_main_~x~0#1| 0))' at error location [2024-11-14 02:58:59,207 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 02:58:59,207 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 02:58:59,207 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [197, 197, 197] total 394 [2024-11-14 02:58:59,207 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [827164718] [2024-11-14 02:58:59,207 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 02:58:59,208 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 395 states [2024-11-14 02:58:59,209 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 02:58:59,218 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 395 interpolants. [2024-11-14 02:58:59,222 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77835, Invalid=83367, Unknown=0, NotChecked=0, Total=161202 [2024-11-14 02:58:59,222 INFO L87 Difference]: Start difference. First operand 224 states and 228 transitions. Second operand has 395 states, 395 states have (on average 1.0227848101265822) internal successors, (404), 394 states have internal predecessors, (404), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 02:59:01,267 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 02:59:01,268 INFO L93 Difference]: Finished difference Result 448 states and 652 transitions. [2024-11-14 02:59:01,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 394 states. [2024-11-14 02:59:01,268 INFO L78 Accepts]: Start accepts. Automaton has has 395 states, 395 states have (on average 1.0227848101265822) internal successors, (404), 394 states have internal predecessors, (404), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 222 [2024-11-14 02:59:01,269 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 02:59:01,270 INFO L225 Difference]: With dead ends: 448 [2024-11-14 02:59:01,271 INFO L226 Difference]: Without dead ends: 421 [2024-11-14 02:59:01,276 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 861 GetRequests, 461 SyntacticMatches, 0 SemanticMatches, 400 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4901 ImplicationChecksByTransitivity, 63.7s TimeCoverageRelationStatistics Valid=77835, Invalid=83367, Unknown=0, NotChecked=0, Total=161202 [2024-11-14 02:59:01,277 INFO L432 NwaCegarLoop]: 7 mSDtfsCounter, 0 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 454 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 84 SdHoareTripleChecker+Invalid, 455 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 454 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-14 02:59:01,277 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 84 Invalid, 455 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 454 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-11-14 02:59:01,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 421 states. [2024-11-14 02:59:01,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 421 to 421. [2024-11-14 02:59:01,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 421 states, 420 states have (on average 1.0119047619047619) internal successors, (425), 420 states have internal predecessors, (425), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 02:59:01,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 421 states to 421 states and 425 transitions. [2024-11-14 02:59:01,299 INFO L78 Accepts]: Start accepts. Automaton has 421 states and 425 transitions. Word has length 222 [2024-11-14 02:59:01,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 02:59:01,299 INFO L471 AbstractCegarLoop]: Abstraction has 421 states and 425 transitions. [2024-11-14 02:59:01,300 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 395 states, 395 states have (on average 1.0227848101265822) internal successors, (404), 394 states have internal predecessors, (404), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 02:59:01,300 INFO L276 IsEmpty]: Start isEmpty. Operand 421 states and 425 transitions. [2024-11-14 02:59:01,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 420 [2024-11-14 02:59:01,306 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 02:59:01,307 INFO L215 NwaCegarLoop]: trace histogram [392, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 02:59:01,330 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65bf2dd1-8840-45cc-86cd-4e637ac30725/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2024-11-14 02:59:01,511 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65bf2dd1-8840-45cc-86cd-4e637ac30725/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2024-11-14 02:59:01,511 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 02:59:01,511 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 02:59:01,511 INFO L85 PathProgramCache]: Analyzing trace with hash 1965886517, now seen corresponding path program 10 times [2024-11-14 02:59:01,512 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 02:59:01,512 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1353017352] [2024-11-14 02:59:01,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 02:59:01,512 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 02:59:02,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:00:35,227 INFO L134 CoverageAnalysis]: Checked inductivity of 77200 backedges. 0 proven. 77028 refuted. 0 times theorem prover too weak. 172 trivial. 0 not checked. [2024-11-14 03:00:35,227 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:00:35,227 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1353017352] [2024-11-14 03:00:35,227 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1353017352] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 03:00:35,227 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1516373424] [2024-11-14 03:00:35,227 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-14 03:00:35,228 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:00:35,228 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65bf2dd1-8840-45cc-86cd-4e637ac30725/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 03:00:35,231 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65bf2dd1-8840-45cc-86cd-4e637ac30725/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 03:00:35,233 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65bf2dd1-8840-45cc-86cd-4e637ac30725/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-11-14 03:00:36,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:00:36,352 INFO L255 TraceCheckSpWp]: Trace formula consists of 3749 conjuncts, 394 conjuncts are in the unsatisfiable core [2024-11-14 03:00:36,368 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 03:00:37,038 INFO L134 CoverageAnalysis]: Checked inductivity of 77200 backedges. 0 proven. 77028 refuted. 0 times theorem prover too weak. 172 trivial. 0 not checked. [2024-11-14 03:00:37,038 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 03:03:53,263 INFO L134 CoverageAnalysis]: Checked inductivity of 77200 backedges. 0 proven. 77028 refuted. 0 times theorem prover too weak. 172 trivial. 0 not checked. [2024-11-14 03:03:53,263 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1516373424] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 03:03:53,263 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [125355174] [2024-11-14 03:03:53,265 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2024-11-14 03:03:53,265 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 03:03:53,265 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 03:03:53,265 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 03:03:53,265 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 03:03:53,358 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 03:03:55,167 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '13915#(and (<= 1 |#StackHeapBarrier|) (<= (+ (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) 4) 1) (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) 0)) (= |ULTIMATE.start_main_~y~0#1| 1) (<= 2 |ULTIMATE.start_main_~#a~0#1.base|) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |ULTIMATE.start_main_~x~0#1| 0))' at error location [2024-11-14 03:03:55,167 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 03:03:55,167 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 03:03:55,167 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [394, 394, 394] total 788 [2024-11-14 03:03:55,167 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [712140080] [2024-11-14 03:03:55,168 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 03:03:55,169 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 789 states [2024-11-14 03:03:55,169 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:03:55,202 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 789 interpolants. [2024-11-14 03:03:55,221 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=310886, Invalid=321934, Unknown=0, NotChecked=0, Total=632820 [2024-11-14 03:03:55,222 INFO L87 Difference]: Start difference. First operand 421 states and 425 transitions. Second operand has 789 states, 789 states have (on average 1.0114068441064639) internal successors, (798), 788 states have internal predecessors, (798), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 03:04:15,578 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:04:15,578 INFO L93 Difference]: Finished difference Result 842 states and 1243 transitions. [2024-11-14 03:04:15,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 788 states. [2024-11-14 03:04:15,580 INFO L78 Accepts]: Start accepts. Automaton has has 789 states, 789 states have (on average 1.0114068441064639) internal successors, (798), 788 states have internal predecessors, (798), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 419 [2024-11-14 03:04:15,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:04:15,585 INFO L225 Difference]: With dead ends: 842 [2024-11-14 03:04:15,585 INFO L226 Difference]: Without dead ends: 815 [2024-11-14 03:04:15,608 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 1649 GetRequests, 855 SyntacticMatches, 0 SemanticMatches, 794 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9826 ImplicationChecksByTransitivity, 260.7s TimeCoverageRelationStatistics Valid=310886, Invalid=321934, Unknown=0, NotChecked=0, Total=632820 [2024-11-14 03:04:15,609 INFO L432 NwaCegarLoop]: 7 mSDtfsCounter, 0 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 819 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 820 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 819 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2024-11-14 03:04:15,609 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 42 Invalid, 820 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 819 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2024-11-14 03:04:15,611 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 815 states. [2024-11-14 03:04:15,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 815 to 815. [2024-11-14 03:04:15,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 815 states, 814 states have (on average 1.0061425061425062) internal successors, (819), 814 states have internal predecessors, (819), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 03:04:15,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 815 states to 815 states and 819 transitions. [2024-11-14 03:04:15,647 INFO L78 Accepts]: Start accepts. Automaton has 815 states and 819 transitions. Word has length 419 [2024-11-14 03:04:15,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:04:15,648 INFO L471 AbstractCegarLoop]: Abstraction has 815 states and 819 transitions. [2024-11-14 03:04:15,649 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 789 states, 789 states have (on average 1.0114068441064639) internal successors, (798), 788 states have internal predecessors, (798), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 03:04:15,649 INFO L276 IsEmpty]: Start isEmpty. Operand 815 states and 819 transitions. [2024-11-14 03:04:15,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 814 [2024-11-14 03:04:15,677 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:04:15,678 INFO L215 NwaCegarLoop]: trace histogram [786, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 03:04:15,711 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65bf2dd1-8840-45cc-86cd-4e637ac30725/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2024-11-14 03:04:15,878 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65bf2dd1-8840-45cc-86cd-4e637ac30725/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2024-11-14 03:04:15,878 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 03:04:15,879 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:04:15,879 INFO L85 PathProgramCache]: Analyzing trace with hash -906232139, now seen corresponding path program 11 times [2024-11-14 03:04:15,879 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:04:15,879 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [53265949] [2024-11-14 03:04:15,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:04:15,879 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:04:19,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat