./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-examples/standard_init6_ground-1.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_d3b45df4-c137-47a3-8fc9-985b49e7049a/bin/utaipan-verify-sOmjnqqW8E/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3b45df4-c137-47a3-8fc9-985b49e7049a/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_d3b45df4-c137-47a3-8fc9-985b49e7049a/bin/utaipan-verify-sOmjnqqW8E/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3b45df4-c137-47a3-8fc9-985b49e7049a/bin/utaipan-verify-sOmjnqqW8E/config/TaipanReach.xml -i ../../sv-benchmarks/c/array-examples/standard_init6_ground-1.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3b45df4-c137-47a3-8fc9-985b49e7049a/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_d3b45df4-c137-47a3-8fc9-985b49e7049a/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 ff138f81519ab5ff475befdf624922816837c8f1983c223aa78c0525de509876 --- Real Ultimate output --- This is Ultimate 0.3.0-dev-826ab2b [2024-11-14 03:22:54,454 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-14 03:22:54,524 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3b45df4-c137-47a3-8fc9-985b49e7049a/bin/utaipan-verify-sOmjnqqW8E/config/svcomp-Reach-32bit-Taipan_Default.epf [2024-11-14 03:22:54,530 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-14 03:22:54,530 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-14 03:22:54,558 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-14 03:22:54,559 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-14 03:22:54,559 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-14 03:22:54,560 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-14 03:22:54,560 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-14 03:22:54,560 INFO L153 SettingsManager]: * User list type=DISABLED [2024-11-14 03:22:54,560 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2024-11-14 03:22:54,561 INFO L153 SettingsManager]: * Explicit value domain=true [2024-11-14 03:22:54,561 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2024-11-14 03:22:54,561 INFO L153 SettingsManager]: * Octagon Domain=false [2024-11-14 03:22:54,561 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2024-11-14 03:22:54,561 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2024-11-14 03:22:54,561 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2024-11-14 03:22:54,562 INFO L153 SettingsManager]: * Interval Domain=false [2024-11-14 03:22:54,562 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2024-11-14 03:22:54,562 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2024-11-14 03:22:54,562 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2024-11-14 03:22:54,563 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-14 03:22:54,563 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-14 03:22:54,563 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-14 03:22:54,563 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-14 03:22:54,563 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-14 03:22:54,563 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-14 03:22:54,563 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-14 03:22:54,564 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-14 03:22:54,564 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-14 03:22:54,564 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-14 03:22:54,564 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-14 03:22:54,564 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-14 03:22:54,564 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-14 03:22:54,564 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-14 03:22:54,564 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-14 03:22:54,564 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-14 03:22:54,565 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2024-11-14 03:22:54,565 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-14 03:22:54,565 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-14 03:22:54,566 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-14 03:22:54,566 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2024-11-14 03:22:54,566 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-14 03:22:54,566 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-14 03:22:54,566 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2024-11-14 03:22:54,566 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-14 03:22:54,567 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_d3b45df4-c137-47a3-8fc9-985b49e7049a/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 -> ff138f81519ab5ff475befdf624922816837c8f1983c223aa78c0525de509876 [2024-11-14 03:22:54,940 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-14 03:22:54,950 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-14 03:22:54,952 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-14 03:22:54,955 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-14 03:22:54,956 INFO L274 PluginConnector]: CDTParser initialized [2024-11-14 03:22:54,958 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3b45df4-c137-47a3-8fc9-985b49e7049a/bin/utaipan-verify-sOmjnqqW8E/../../sv-benchmarks/c/array-examples/standard_init6_ground-1.i Unable to find full path for "g++" [2024-11-14 03:22:56,929 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-14 03:22:57,175 INFO L384 CDTParser]: Found 1 translation units. [2024-11-14 03:22:57,176 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3b45df4-c137-47a3-8fc9-985b49e7049a/sv-benchmarks/c/array-examples/standard_init6_ground-1.i [2024-11-14 03:22:57,194 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3b45df4-c137-47a3-8fc9-985b49e7049a/bin/utaipan-verify-sOmjnqqW8E/data/9a84e4437/0381e5a410f54a71af0fb76d9baaa40b/FLAG8645dee48 [2024-11-14 03:22:57,225 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3b45df4-c137-47a3-8fc9-985b49e7049a/bin/utaipan-verify-sOmjnqqW8E/data/9a84e4437/0381e5a410f54a71af0fb76d9baaa40b [2024-11-14 03:22:57,228 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-14 03:22:57,230 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-14 03:22:57,231 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-14 03:22:57,231 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-14 03:22:57,237 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-14 03:22:57,238 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.11 03:22:57" (1/1) ... [2024-11-14 03:22:57,239 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4aaf3dc8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 03:22:57, skipping insertion in model container [2024-11-14 03:22:57,239 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.11 03:22:57" (1/1) ... [2024-11-14 03:22:57,266 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-14 03:22:57,437 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_d3b45df4-c137-47a3-8fc9-985b49e7049a/sv-benchmarks/c/array-examples/standard_init6_ground-1.i[816,829] [2024-11-14 03:22:57,458 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-14 03:22:57,468 INFO L200 MainTranslator]: Completed pre-run [2024-11-14 03:22:57,481 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_d3b45df4-c137-47a3-8fc9-985b49e7049a/sv-benchmarks/c/array-examples/standard_init6_ground-1.i[816,829] [2024-11-14 03:22:57,490 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-14 03:22:57,506 INFO L204 MainTranslator]: Completed translation [2024-11-14 03:22:57,507 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 03:22:57 WrapperNode [2024-11-14 03:22:57,507 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-14 03:22:57,508 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-14 03:22:57,509 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-14 03:22:57,509 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-14 03:22:57,516 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 03:22:57" (1/1) ... [2024-11-14 03:22:57,523 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 03:22:57" (1/1) ... [2024-11-14 03:22:57,541 INFO L138 Inliner]: procedures = 15, calls = 17, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 67 [2024-11-14 03:22:57,541 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-14 03:22:57,542 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-14 03:22:57,542 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-14 03:22:57,543 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-14 03:22:57,551 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 03:22:57" (1/1) ... [2024-11-14 03:22:57,551 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 03:22:57" (1/1) ... [2024-11-14 03:22:57,552 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 03:22:57" (1/1) ... [2024-11-14 03:22:57,552 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 03:22:57" (1/1) ... [2024-11-14 03:22:57,565 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 03:22:57" (1/1) ... [2024-11-14 03:22:57,571 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 03:22:57" (1/1) ... [2024-11-14 03:22:57,575 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 03:22:57" (1/1) ... [2024-11-14 03:22:57,576 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 03:22:57" (1/1) ... [2024-11-14 03:22:57,582 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-14 03:22:57,583 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-14 03:22:57,583 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-14 03:22:57,583 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-14 03:22:57,584 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 03:22:57" (1/1) ... [2024-11-14 03:22:57,595 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2024-11-14 03:22:57,618 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3b45df4-c137-47a3-8fc9-985b49e7049a/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 03:22:57,633 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3b45df4-c137-47a3-8fc9-985b49e7049a/bin/utaipan-verify-sOmjnqqW8E/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2024-11-14 03:22:57,638 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3b45df4-c137-47a3-8fc9-985b49e7049a/bin/utaipan-verify-sOmjnqqW8E/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2024-11-14 03:22:57,672 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-14 03:22:57,672 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2024-11-14 03:22:57,672 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-11-14 03:22:57,672 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2024-11-14 03:22:57,672 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-14 03:22:57,672 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-14 03:22:57,673 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2024-11-14 03:22:57,673 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-11-14 03:22:57,754 INFO L238 CfgBuilder]: Building ICFG [2024-11-14 03:22:57,756 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-14 03:22:57,897 INFO L? ?]: Removed 13 outVars from TransFormulas that were not future-live. [2024-11-14 03:22:57,897 INFO L287 CfgBuilder]: Performing block encoding [2024-11-14 03:22:57,939 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-14 03:22:57,939 INFO L316 CfgBuilder]: Removed 7 assume(true) statements. [2024-11-14 03:22:57,940 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.11 03:22:57 BoogieIcfgContainer [2024-11-14 03:22:57,940 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-14 03:22:57,942 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-14 03:22:57,942 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-14 03:22:57,947 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-14 03:22:57,948 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.11 03:22:57" (1/3) ... [2024-11-14 03:22:57,948 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3d49a5b9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.11 03:22:57, skipping insertion in model container [2024-11-14 03:22:57,948 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 03:22:57" (2/3) ... [2024-11-14 03:22:57,949 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3d49a5b9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.11 03:22:57, skipping insertion in model container [2024-11-14 03:22:57,949 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.11 03:22:57" (3/3) ... [2024-11-14 03:22:57,950 INFO L112 eAbstractionObserver]: Analyzing ICFG standard_init6_ground-1.i [2024-11-14 03:22:57,967 INFO L217 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-14 03:22:57,969 INFO L154 ceAbstractionStarter]: Applying trace abstraction to ICFG standard_init6_ground-1.i that has 1 procedures, 13 locations, 1 initial locations, 7 loop locations, and 1 error locations. [2024-11-14 03:22:58,024 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-14 03:22:58,037 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;@6d84c14e, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-14 03:22:58,037 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-11-14 03:22:58,042 INFO L276 IsEmpty]: Start isEmpty. Operand has 13 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 12 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 03:22:58,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2024-11-14 03:22:58,048 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:22:58,049 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 03:22:58,049 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 03:22:58,054 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:22:58,055 INFO L85 PathProgramCache]: Analyzing trace with hash 1960245362, now seen corresponding path program 1 times [2024-11-14 03:22:58,064 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:22:58,065 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [500433639] [2024-11-14 03:22:58,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:22:58,066 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:22:58,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:22:58,328 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 03:22:58,329 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:22:58,329 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [500433639] [2024-11-14 03:22:58,333 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [500433639] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 03:22:58,333 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-14 03:22:58,333 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-14 03:22:58,335 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1037831998] [2024-11-14 03:22:58,335 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 03:22:58,342 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-14 03:22:58,342 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:22:58,361 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-14 03:22:58,363 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-14 03:22:58,365 INFO L87 Difference]: Start difference. First operand has 13 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 12 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) Second operand has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 2 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 03:22:58,453 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:22:58,453 INFO L93 Difference]: Finished difference Result 30 states and 49 transitions. [2024-11-14 03:22:58,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-14 03:22:58,456 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 2 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 03:22:58,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:22:58,465 INFO L225 Difference]: With dead ends: 30 [2024-11-14 03:22:58,465 INFO L226 Difference]: Without dead ends: 18 [2024-11-14 03:22:58,469 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 03:22:58,472 INFO L432 NwaCegarLoop]: 5 mSDtfsCounter, 0 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 10 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-14 03:22:58,473 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 10 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-14 03:22:58,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2024-11-14 03:22:58,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2024-11-14 03:22:58,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 17 states have (on average 1.411764705882353) internal successors, (24), 17 states have internal predecessors, (24), 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 03:22:58,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 24 transitions. [2024-11-14 03:22:58,524 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 24 transitions. Word has length 10 [2024-11-14 03:22:58,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:22:58,524 INFO L471 AbstractCegarLoop]: Abstraction has 18 states and 24 transitions. [2024-11-14 03:22:58,524 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 2 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 03:22:58,525 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 24 transitions. [2024-11-14 03:22:58,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2024-11-14 03:22:58,525 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:22:58,525 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 03:22:58,526 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-14 03:22:58,526 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 03:22:58,526 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:22:58,527 INFO L85 PathProgramCache]: Analyzing trace with hash 205375374, now seen corresponding path program 1 times [2024-11-14 03:22:58,527 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:22:58,527 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1104157390] [2024-11-14 03:22:58,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:22:58,527 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:22:58,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:22:58,659 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-14 03:22:58,659 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:22:58,659 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1104157390] [2024-11-14 03:22:58,659 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1104157390] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 03:22:58,660 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [494668072] [2024-11-14 03:22:58,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:22:58,660 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:22:58,660 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3b45df4-c137-47a3-8fc9-985b49e7049a/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 03:22:58,663 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3b45df4-c137-47a3-8fc9-985b49e7049a/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 03:22:58,668 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3b45df4-c137-47a3-8fc9-985b49e7049a/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-14 03:22:58,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:22:58,771 INFO L255 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-11-14 03:22:58,775 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 03:22:58,819 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-14 03:22:58,820 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 03:22:58,851 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-14 03:22:58,851 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [494668072] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 03:22:58,851 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [564403763] [2024-11-14 03:22:58,872 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2024-11-14 03:22:58,872 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 03:22:58,876 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 03:22:58,881 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 03:22:58,882 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 03:22:59,696 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 03:22:59,822 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '198#(and (<= 1 |#StackHeapBarrier|) (<= 2 |ULTIMATE.start_main_~#a~0#1.base|) (not (= (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) 0) 46)) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |ULTIMATE.start_main_~x~0#1| 0))' at error location [2024-11-14 03:22:59,822 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 03:22:59,822 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 03:22:59,823 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2024-11-14 03:22:59,823 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [562794791] [2024-11-14 03:22:59,824 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 03:22:59,824 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-14 03:22:59,824 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:22:59,825 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-14 03:22:59,825 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2024-11-14 03:22:59,826 INFO L87 Difference]: Start difference. First operand 18 states and 24 transitions. Second operand has 7 states, 7 states have (on average 3.0) internal successors, (21), 6 states have internal predecessors, (21), 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 03:23:00,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:23:00,020 INFO L93 Difference]: Finished difference Result 51 states and 80 transitions. [2024-11-14 03:23:00,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-14 03:23:00,022 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.0) internal successors, (21), 6 states have internal predecessors, (21), 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 16 [2024-11-14 03:23:00,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:23:00,023 INFO L225 Difference]: With dead ends: 51 [2024-11-14 03:23:00,023 INFO L226 Difference]: Without dead ends: 36 [2024-11-14 03:23:00,024 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2024-11-14 03:23:00,025 INFO L432 NwaCegarLoop]: 5 mSDtfsCounter, 0 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 10 SdHoareTripleChecker+Invalid, 100 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-14 03:23:00,025 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 10 Invalid, 100 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-14 03:23:00,028 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2024-11-14 03:23:00,036 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2024-11-14 03:23:00,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 35 states have (on average 1.2) internal successors, (42), 35 states have internal predecessors, (42), 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 03:23:00,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 42 transitions. [2024-11-14 03:23:00,039 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 42 transitions. Word has length 16 [2024-11-14 03:23:00,040 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:23:00,040 INFO L471 AbstractCegarLoop]: Abstraction has 36 states and 42 transitions. [2024-11-14 03:23:00,041 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.0) internal successors, (21), 6 states have internal predecessors, (21), 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 03:23:00,041 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 42 transitions. [2024-11-14 03:23:00,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2024-11-14 03:23:00,041 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:23:00,042 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 03:23:00,064 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3b45df4-c137-47a3-8fc9-985b49e7049a/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-14 03:23:00,242 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3b45df4-c137-47a3-8fc9-985b49e7049a/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:23:00,243 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 03:23:00,243 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:23:00,243 INFO L85 PathProgramCache]: Analyzing trace with hash -1757042574, now seen corresponding path program 2 times [2024-11-14 03:23:00,243 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:23:00,244 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [274488231] [2024-11-14 03:23:00,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:23:00,244 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:23:00,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:23:00,596 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2024-11-14 03:23:00,597 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:23:00,598 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [274488231] [2024-11-14 03:23:00,598 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [274488231] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 03:23:00,598 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [407032949] [2024-11-14 03:23:00,598 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-14 03:23:00,598 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:23:00,598 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3b45df4-c137-47a3-8fc9-985b49e7049a/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 03:23:00,601 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3b45df4-c137-47a3-8fc9-985b49e7049a/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 03:23:00,605 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3b45df4-c137-47a3-8fc9-985b49e7049a/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-14 03:23:00,808 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-11-14 03:23:00,808 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 03:23:00,810 INFO L255 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-14 03:23:00,813 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 03:23:00,846 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2024-11-14 03:23:00,848 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 03:23:00,972 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2024-11-14 03:23:00,972 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [407032949] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 03:23:00,972 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [232367633] [2024-11-14 03:23:00,975 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2024-11-14 03:23:00,975 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 03:23:00,977 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 03:23:00,977 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 03:23:00,977 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 03:23:01,473 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 03:23:01,591 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '573#(and (<= 1 |#StackHeapBarrier|) (<= 2 |ULTIMATE.start_main_~#a~0#1.base|) (not (= (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) 0) 46)) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |ULTIMATE.start_main_~x~0#1| 0))' at error location [2024-11-14 03:23:01,591 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 03:23:01,591 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 03:23:01,591 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 13 [2024-11-14 03:23:01,591 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1224995141] [2024-11-14 03:23:01,591 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 03:23:01,592 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-11-14 03:23:01,592 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:23:01,593 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-11-14 03:23:01,593 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=184, Unknown=0, NotChecked=0, Total=272 [2024-11-14 03:23:01,595 INFO L87 Difference]: Start difference. First operand 36 states and 42 transitions. Second operand has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 13 states have internal predecessors, (37), 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 03:23:01,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:23:01,891 INFO L93 Difference]: Finished difference Result 102 states and 149 transitions. [2024-11-14 03:23:01,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-11-14 03:23:01,892 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 13 states have internal predecessors, (37), 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 03:23:01,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:23:01,893 INFO L225 Difference]: With dead ends: 102 [2024-11-14 03:23:01,894 INFO L226 Difference]: Without dead ends: 72 [2024-11-14 03:23:01,895 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 91 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=88, Invalid=184, Unknown=0, NotChecked=0, Total=272 [2024-11-14 03:23:01,896 INFO L432 NwaCegarLoop]: 5 mSDtfsCounter, 0 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 76 mSolverCounterSat, 115 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 20 SdHoareTripleChecker+Invalid, 191 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 115 IncrementalHoareTripleChecker+Valid, 76 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-14 03:23:01,897 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 20 Invalid, 191 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [115 Valid, 76 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-14 03:23:01,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2024-11-14 03:23:01,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 72. [2024-11-14 03:23:01,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 71 states have (on average 1.0985915492957747) internal successors, (78), 71 states have internal predecessors, (78), 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 03:23:01,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 78 transitions. [2024-11-14 03:23:01,917 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 78 transitions. Word has length 34 [2024-11-14 03:23:01,917 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:23:01,917 INFO L471 AbstractCegarLoop]: Abstraction has 72 states and 78 transitions. [2024-11-14 03:23:01,917 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 13 states have internal predecessors, (37), 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 03:23:01,918 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 78 transitions. [2024-11-14 03:23:01,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2024-11-14 03:23:01,919 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:23:01,919 INFO L215 NwaCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 03:23:01,942 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3b45df4-c137-47a3-8fc9-985b49e7049a/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-11-14 03:23:02,119 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3b45df4-c137-47a3-8fc9-985b49e7049a/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:23:02,120 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 03:23:02,120 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:23:02,121 INFO L85 PathProgramCache]: Analyzing trace with hash -771391374, now seen corresponding path program 3 times [2024-11-14 03:23:02,121 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:23:02,121 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1348460006] [2024-11-14 03:23:02,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:23:02,121 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:23:02,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:23:03,072 INFO L134 CoverageAnalysis]: Checked inductivity of 330 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 275 trivial. 0 not checked. [2024-11-14 03:23:03,073 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:23:03,073 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1348460006] [2024-11-14 03:23:03,073 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1348460006] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 03:23:03,073 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1138134048] [2024-11-14 03:23:03,073 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-14 03:23:03,073 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:23:03,073 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3b45df4-c137-47a3-8fc9-985b49e7049a/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 03:23:03,078 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3b45df4-c137-47a3-8fc9-985b49e7049a/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 03:23:03,081 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3b45df4-c137-47a3-8fc9-985b49e7049a/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-14 03:23:03,288 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-14 03:23:03,289 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 03:23:03,291 INFO L255 TraceCheckSpWp]: Trace formula consists of 479 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-11-14 03:23:03,295 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 03:23:03,336 INFO L134 CoverageAnalysis]: Checked inductivity of 330 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 275 trivial. 0 not checked. [2024-11-14 03:23:03,336 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 03:23:03,647 INFO L134 CoverageAnalysis]: Checked inductivity of 330 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 275 trivial. 0 not checked. [2024-11-14 03:23:03,648 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1138134048] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 03:23:03,648 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1550661828] [2024-11-14 03:23:03,650 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2024-11-14 03:23:03,650 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 03:23:03,651 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 03:23:03,651 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 03:23:03,651 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 03:23:03,924 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 03:23:04,036 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1350#(and (<= 1 |#StackHeapBarrier|) (<= 2 |ULTIMATE.start_main_~#a~0#1.base|) (not (= (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) 0) 46)) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |ULTIMATE.start_main_~x~0#1| 0))' at error location [2024-11-14 03:23:04,036 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 03:23:04,036 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 03:23:04,036 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 24 [2024-11-14 03:23:04,037 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [592465566] [2024-11-14 03:23:04,037 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 03:23:04,037 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2024-11-14 03:23:04,037 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:23:04,038 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2024-11-14 03:23:04,038 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=310, Invalid=502, Unknown=0, NotChecked=0, Total=812 [2024-11-14 03:23:04,038 INFO L87 Difference]: Start difference. First operand 72 states and 78 transitions. Second operand has 25 states, 25 states have (on average 1.56) internal successors, (39), 24 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 03:23:04,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:23:04,599 INFO L93 Difference]: Finished difference Result 204 states and 287 transitions. [2024-11-14 03:23:04,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2024-11-14 03:23:04,600 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.56) internal successors, (39), 24 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 70 [2024-11-14 03:23:04,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:23:04,601 INFO L225 Difference]: With dead ends: 204 [2024-11-14 03:23:04,604 INFO L226 Difference]: Without dead ends: 144 [2024-11-14 03:23:04,605 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 220 GetRequests, 193 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 173 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=310, Invalid=502, Unknown=0, NotChecked=0, Total=812 [2024-11-14 03:23:04,606 INFO L432 NwaCegarLoop]: 5 mSDtfsCounter, 0 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 156 mSolverCounterSat, 311 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 467 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 311 IncrementalHoareTripleChecker+Valid, 156 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-11-14 03:23:04,607 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 30 Invalid, 467 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [311 Valid, 156 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-11-14 03:23:04,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2024-11-14 03:23:04,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 144. [2024-11-14 03:23:04,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 144 states, 143 states have (on average 1.048951048951049) internal successors, (150), 143 states have internal predecessors, (150), 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 03:23:04,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 150 transitions. [2024-11-14 03:23:04,625 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 150 transitions. Word has length 70 [2024-11-14 03:23:04,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:23:04,625 INFO L471 AbstractCegarLoop]: Abstraction has 144 states and 150 transitions. [2024-11-14 03:23:04,625 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.56) internal successors, (39), 24 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 03:23:04,626 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 150 transitions. [2024-11-14 03:23:04,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2024-11-14 03:23:04,630 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:23:04,630 INFO L215 NwaCegarLoop]: trace histogram [22, 22, 22, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 03:23:04,652 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3b45df4-c137-47a3-8fc9-985b49e7049a/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-11-14 03:23:04,830 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3b45df4-c137-47a3-8fc9-985b49e7049a/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:23:04,831 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 03:23:04,832 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:23:04,836 INFO L85 PathProgramCache]: Analyzing trace with hash 87904370, now seen corresponding path program 4 times [2024-11-14 03:23:04,836 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:23:04,836 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1300465365] [2024-11-14 03:23:04,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:23:04,836 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:23:05,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:23:06,680 INFO L134 CoverageAnalysis]: Checked inductivity of 1518 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 1265 trivial. 0 not checked. [2024-11-14 03:23:06,680 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:23:06,680 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1300465365] [2024-11-14 03:23:06,681 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1300465365] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 03:23:06,682 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1891222963] [2024-11-14 03:23:06,683 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-14 03:23:06,683 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:23:06,683 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3b45df4-c137-47a3-8fc9-985b49e7049a/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 03:23:06,685 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3b45df4-c137-47a3-8fc9-985b49e7049a/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 03:23:06,688 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3b45df4-c137-47a3-8fc9-985b49e7049a/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-14 03:23:07,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:23:07,044 INFO L255 TraceCheckSpWp]: Trace formula consists of 983 conjuncts, 24 conjuncts are in the unsatisfiable core [2024-11-14 03:23:07,048 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 03:23:07,115 INFO L134 CoverageAnalysis]: Checked inductivity of 1518 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 1265 trivial. 0 not checked. [2024-11-14 03:23:07,115 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 03:23:08,188 INFO L134 CoverageAnalysis]: Checked inductivity of 1518 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 1265 trivial. 0 not checked. [2024-11-14 03:23:08,189 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1891222963] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 03:23:08,189 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [655051679] [2024-11-14 03:23:08,191 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2024-11-14 03:23:08,193 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 03:23:08,193 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 03:23:08,194 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 03:23:08,194 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 03:23:08,427 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 03:23:08,569 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2931#(and (<= 1 |#StackHeapBarrier|) (<= 2 |ULTIMATE.start_main_~#a~0#1.base|) (not (= (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) 0) 46)) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |ULTIMATE.start_main_~x~0#1| 0))' at error location [2024-11-14 03:23:08,569 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 03:23:08,569 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 03:23:08,570 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24, 24] total 48 [2024-11-14 03:23:08,570 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [857673873] [2024-11-14 03:23:08,570 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 03:23:08,571 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2024-11-14 03:23:08,571 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:23:08,572 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2024-11-14 03:23:08,573 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1186, Invalid=1570, Unknown=0, NotChecked=0, Total=2756 [2024-11-14 03:23:08,574 INFO L87 Difference]: Start difference. First operand 144 states and 150 transitions. Second operand has 49 states, 49 states have (on average 1.2857142857142858) internal successors, (63), 48 states have internal predecessors, (63), 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 03:23:09,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:23:09,820 INFO L93 Difference]: Finished difference Result 408 states and 563 transitions. [2024-11-14 03:23:09,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2024-11-14 03:23:09,821 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 1.2857142857142858) internal successors, (63), 48 states have internal predecessors, (63), 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 142 [2024-11-14 03:23:09,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:23:09,823 INFO L225 Difference]: With dead ends: 408 [2024-11-14 03:23:09,824 INFO L226 Difference]: Without dead ends: 288 [2024-11-14 03:23:09,826 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 448 GetRequests, 397 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 365 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1186, Invalid=1570, Unknown=0, NotChecked=0, Total=2756 [2024-11-14 03:23:09,827 INFO L432 NwaCegarLoop]: 5 mSDtfsCounter, 0 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 299 mSolverCounterSat, 966 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 1265 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 966 IncrementalHoareTripleChecker+Valid, 299 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2024-11-14 03:23:09,827 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 25 Invalid, 1265 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [966 Valid, 299 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2024-11-14 03:23:09,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 288 states. [2024-11-14 03:23:09,853 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 288 to 288. [2024-11-14 03:23:09,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 288 states, 287 states have (on average 1.024390243902439) internal successors, (294), 287 states have internal predecessors, (294), 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 03:23:09,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 288 states to 288 states and 294 transitions. [2024-11-14 03:23:09,860 INFO L78 Accepts]: Start accepts. Automaton has 288 states and 294 transitions. Word has length 142 [2024-11-14 03:23:09,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:23:09,860 INFO L471 AbstractCegarLoop]: Abstraction has 288 states and 294 transitions. [2024-11-14 03:23:09,860 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 1.2857142857142858) internal successors, (63), 48 states have internal predecessors, (63), 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 03:23:09,860 INFO L276 IsEmpty]: Start isEmpty. Operand 288 states and 294 transitions. [2024-11-14 03:23:09,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 287 [2024-11-14 03:23:09,869 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:23:09,869 INFO L215 NwaCegarLoop]: trace histogram [46, 46, 46, 46, 46, 46, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 03:23:09,891 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3b45df4-c137-47a3-8fc9-985b49e7049a/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-11-14 03:23:10,070 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3b45df4-c137-47a3-8fc9-985b49e7049a/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:23:10,070 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 03:23:10,072 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:23:10,072 INFO L85 PathProgramCache]: Analyzing trace with hash 65892466, now seen corresponding path program 5 times [2024-11-14 03:23:10,073 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:23:10,073 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [733946290] [2024-11-14 03:23:10,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:23:10,076 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:23:10,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:23:15,056 INFO L134 CoverageAnalysis]: Checked inductivity of 6486 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 5405 trivial. 0 not checked. [2024-11-14 03:23:15,056 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:23:15,056 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [733946290] [2024-11-14 03:23:15,056 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [733946290] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 03:23:15,056 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [82838089] [2024-11-14 03:23:15,056 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-14 03:23:15,056 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:23:15,056 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3b45df4-c137-47a3-8fc9-985b49e7049a/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 03:23:15,059 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3b45df4-c137-47a3-8fc9-985b49e7049a/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 03:23:15,061 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3b45df4-c137-47a3-8fc9-985b49e7049a/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process