./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/loop-acceleration/array_4.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_1fbbee8f-8d44-4414-8f96-d3b0b7dbd49b/bin/utaipan-verify-sOmjnqqW8E/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fbbee8f-8d44-4414-8f96-d3b0b7dbd49b/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_1fbbee8f-8d44-4414-8f96-d3b0b7dbd49b/bin/utaipan-verify-sOmjnqqW8E/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fbbee8f-8d44-4414-8f96-d3b0b7dbd49b/bin/utaipan-verify-sOmjnqqW8E/config/TaipanReach.xml -i ../../sv-benchmarks/c/loop-acceleration/array_4.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fbbee8f-8d44-4414-8f96-d3b0b7dbd49b/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_1fbbee8f-8d44-4414-8f96-d3b0b7dbd49b/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 e8c27e61ac5d5a22c0e00a5dbac1b872460567877a501387ed9d5bda89096498 --- Real Ultimate output --- This is Ultimate 0.3.0-dev-826ab2b [2024-11-13 23:33:10,503 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-13 23:33:10,575 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fbbee8f-8d44-4414-8f96-d3b0b7dbd49b/bin/utaipan-verify-sOmjnqqW8E/config/svcomp-Reach-32bit-Taipan_Default.epf [2024-11-13 23:33:10,582 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-13 23:33:10,582 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-13 23:33:10,625 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-13 23:33:10,625 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-13 23:33:10,626 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-13 23:33:10,626 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-13 23:33:10,626 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-13 23:33:10,626 INFO L153 SettingsManager]: * User list type=DISABLED [2024-11-13 23:33:10,627 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2024-11-13 23:33:10,627 INFO L153 SettingsManager]: * Explicit value domain=true [2024-11-13 23:33:10,627 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2024-11-13 23:33:10,627 INFO L153 SettingsManager]: * Octagon Domain=false [2024-11-13 23:33:10,627 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2024-11-13 23:33:10,627 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2024-11-13 23:33:10,627 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2024-11-13 23:33:10,627 INFO L153 SettingsManager]: * Interval Domain=false [2024-11-13 23:33:10,627 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2024-11-13 23:33:10,627 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2024-11-13 23:33:10,628 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2024-11-13 23:33:10,628 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-13 23:33:10,628 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-13 23:33:10,628 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-13 23:33:10,628 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-13 23:33:10,628 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-13 23:33:10,628 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-13 23:33:10,628 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-13 23:33:10,629 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-13 23:33:10,629 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-13 23:33:10,629 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-13 23:33:10,629 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-13 23:33:10,629 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-13 23:33:10,629 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-13 23:33:10,631 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-13 23:33:10,631 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-13 23:33:10,631 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-13 23:33:10,632 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2024-11-13 23:33:10,632 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-13 23:33:10,632 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-13 23:33:10,632 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-13 23:33:10,632 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2024-11-13 23:33:10,632 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-13 23:33:10,633 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-13 23:33:10,633 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2024-11-13 23:33:10,633 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-13 23:33:10,633 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_1fbbee8f-8d44-4414-8f96-d3b0b7dbd49b/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 -> e8c27e61ac5d5a22c0e00a5dbac1b872460567877a501387ed9d5bda89096498 [2024-11-13 23:33:11,049 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-13 23:33:11,064 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-13 23:33:11,067 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-13 23:33:11,068 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-13 23:33:11,069 INFO L274 PluginConnector]: CDTParser initialized [2024-11-13 23:33:11,072 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fbbee8f-8d44-4414-8f96-d3b0b7dbd49b/bin/utaipan-verify-sOmjnqqW8E/../../sv-benchmarks/c/loop-acceleration/array_4.i Unable to find full path for "g++" [2024-11-13 23:33:13,225 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-13 23:33:13,499 INFO L384 CDTParser]: Found 1 translation units. [2024-11-13 23:33:13,499 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fbbee8f-8d44-4414-8f96-d3b0b7dbd49b/sv-benchmarks/c/loop-acceleration/array_4.i [2024-11-13 23:33:13,507 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fbbee8f-8d44-4414-8f96-d3b0b7dbd49b/bin/utaipan-verify-sOmjnqqW8E/data/debf392ad/8257a73059ab42bcab92ba55692d9e28/FLAGad20131d2 [2024-11-13 23:33:13,528 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fbbee8f-8d44-4414-8f96-d3b0b7dbd49b/bin/utaipan-verify-sOmjnqqW8E/data/debf392ad/8257a73059ab42bcab92ba55692d9e28 [2024-11-13 23:33:13,530 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-13 23:33:13,532 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-13 23:33:13,534 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-13 23:33:13,534 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-13 23:33:13,539 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-13 23:33:13,540 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.11 11:33:13" (1/1) ... [2024-11-13 23:33:13,541 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@37202508 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 11:33:13, skipping insertion in model container [2024-11-13 23:33:13,541 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.11 11:33:13" (1/1) ... [2024-11-13 23:33:13,557 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-13 23:33:13,714 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_1fbbee8f-8d44-4414-8f96-d3b0b7dbd49b/sv-benchmarks/c/loop-acceleration/array_4.i[848,861] [2024-11-13 23:33:13,729 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-13 23:33:13,738 INFO L200 MainTranslator]: Completed pre-run [2024-11-13 23:33:13,750 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_1fbbee8f-8d44-4414-8f96-d3b0b7dbd49b/sv-benchmarks/c/loop-acceleration/array_4.i[848,861] [2024-11-13 23:33:13,756 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-13 23:33:13,772 INFO L204 MainTranslator]: Completed translation [2024-11-13 23:33:13,772 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 11:33:13 WrapperNode [2024-11-13 23:33:13,773 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-13 23:33:13,774 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-13 23:33:13,774 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-13 23:33:13,774 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-13 23:33:13,782 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 11:33:13" (1/1) ... [2024-11-13 23:33:13,789 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 11:33:13" (1/1) ... [2024-11-13 23:33:13,809 INFO L138 Inliner]: procedures = 16, calls = 12, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 41 [2024-11-13 23:33:13,810 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-13 23:33:13,811 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-13 23:33:13,811 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-13 23:33:13,812 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-13 23:33:13,820 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 11:33:13" (1/1) ... [2024-11-13 23:33:13,821 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 11:33:13" (1/1) ... [2024-11-13 23:33:13,823 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 11:33:13" (1/1) ... [2024-11-13 23:33:13,824 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 11:33:13" (1/1) ... [2024-11-13 23:33:13,831 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 11:33:13" (1/1) ... [2024-11-13 23:33:13,837 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 11:33:13" (1/1) ... [2024-11-13 23:33:13,841 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 11:33:13" (1/1) ... [2024-11-13 23:33:13,842 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 11:33:13" (1/1) ... [2024-11-13 23:33:13,847 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-13 23:33:13,848 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-13 23:33:13,849 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-13 23:33:13,849 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-13 23:33:13,850 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 11:33:13" (1/1) ... [2024-11-13 23:33:13,864 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2024-11-13 23:33:13,889 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fbbee8f-8d44-4414-8f96-d3b0b7dbd49b/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-13 23:33:13,906 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fbbee8f-8d44-4414-8f96-d3b0b7dbd49b/bin/utaipan-verify-sOmjnqqW8E/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2024-11-13 23:33:13,911 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fbbee8f-8d44-4414-8f96-d3b0b7dbd49b/bin/utaipan-verify-sOmjnqqW8E/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2024-11-13 23:33:13,948 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-13 23:33:13,949 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2024-11-13 23:33:13,949 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-11-13 23:33:13,949 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2024-11-13 23:33:13,949 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-13 23:33:13,950 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-13 23:33:13,950 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2024-11-13 23:33:13,951 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-11-13 23:33:14,042 INFO L238 CfgBuilder]: Building ICFG [2024-11-13 23:33:14,045 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-13 23:33:14,197 INFO L? ?]: Removed 7 outVars from TransFormulas that were not future-live. [2024-11-13 23:33:14,197 INFO L287 CfgBuilder]: Performing block encoding [2024-11-13 23:33:14,254 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-13 23:33:14,256 INFO L316 CfgBuilder]: Removed 2 assume(true) statements. [2024-11-13 23:33:14,256 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.11 11:33:14 BoogieIcfgContainer [2024-11-13 23:33:14,256 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-13 23:33:14,260 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-13 23:33:14,262 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-13 23:33:14,270 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-13 23:33:14,271 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.11 11:33:13" (1/3) ... [2024-11-13 23:33:14,273 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7fcd181d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.11 11:33:14, skipping insertion in model container [2024-11-13 23:33:14,273 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 11:33:13" (2/3) ... [2024-11-13 23:33:14,273 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7fcd181d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.11 11:33:14, skipping insertion in model container [2024-11-13 23:33:14,275 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.11 11:33:14" (3/3) ... [2024-11-13 23:33:14,276 INFO L112 eAbstractionObserver]: Analyzing ICFG array_4.i [2024-11-13 23:33:14,298 INFO L217 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-13 23:33:14,302 INFO L154 ceAbstractionStarter]: Applying trace abstraction to ICFG array_4.i that has 1 procedures, 10 locations, 1 initial locations, 2 loop locations, and 1 error locations. [2024-11-13 23:33:14,389 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-13 23:33:14,409 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;@2ad1019a, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-13 23:33:14,409 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-11-13 23:33:14,414 INFO L276 IsEmpty]: Start isEmpty. Operand has 10 states, 8 states have (on average 1.625) internal successors, (13), 9 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 23:33:14,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2024-11-13 23:33:14,423 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 23:33:14,424 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2024-11-13 23:33:14,425 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 23:33:14,431 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 23:33:14,431 INFO L85 PathProgramCache]: Analyzing trace with hash -2133156472, now seen corresponding path program 1 times [2024-11-13 23:33:14,443 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-13 23:33:14,443 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2998724] [2024-11-13 23:33:14,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 23:33:14,445 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 23:33:14,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 23:33:14,633 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 23:33:14,634 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-13 23:33:14,634 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2998724] [2024-11-13 23:33:14,635 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2998724] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 23:33:14,635 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-13 23:33:14,635 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-13 23:33:14,637 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [228840564] [2024-11-13 23:33:14,638 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 23:33:14,642 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-11-13 23:33:14,643 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-13 23:33:14,665 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-11-13 23:33:14,666 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-11-13 23:33:14,668 INFO L87 Difference]: Start difference. First operand has 10 states, 8 states have (on average 1.625) internal successors, (13), 9 states have internal predecessors, (13), 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 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 23:33:14,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 23:33:14,694 INFO L93 Difference]: Finished difference Result 16 states and 19 transitions. [2024-11-13 23:33:14,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-11-13 23:33:14,699 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 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 6 [2024-11-13 23:33:14,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 23:33:14,710 INFO L225 Difference]: With dead ends: 16 [2024-11-13 23:33:14,710 INFO L226 Difference]: Without dead ends: 8 [2024-11-13 23:33:14,714 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-11-13 23:33:14,720 INFO L432 NwaCegarLoop]: 8 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 8 SdHoareTripleChecker+Invalid, 3 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-13 23:33:14,721 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 8 Invalid, 3 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-13 23:33:14,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8 states. [2024-11-13 23:33:14,751 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8 to 8. [2024-11-13 23:33:14,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8 states, 7 states have (on average 1.2857142857142858) internal successors, (9), 7 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 23:33:14,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 9 transitions. [2024-11-13 23:33:14,758 INFO L78 Accepts]: Start accepts. Automaton has 8 states and 9 transitions. Word has length 6 [2024-11-13 23:33:14,758 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 23:33:14,758 INFO L471 AbstractCegarLoop]: Abstraction has 8 states and 9 transitions. [2024-11-13 23:33:14,759 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 23:33:14,759 INFO L276 IsEmpty]: Start isEmpty. Operand 8 states and 9 transitions. [2024-11-13 23:33:14,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2024-11-13 23:33:14,759 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 23:33:14,759 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-11-13 23:33:14,760 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-13 23:33:14,760 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 23:33:14,761 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 23:33:14,761 INFO L85 PathProgramCache]: Analyzing trace with hash -1709987498, now seen corresponding path program 1 times [2024-11-13 23:33:14,761 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-13 23:33:14,761 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [294829974] [2024-11-13 23:33:14,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 23:33:14,762 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 23:33:14,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 23:33:14,895 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 23:33:14,896 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-13 23:33:14,896 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [294829974] [2024-11-13 23:33:14,896 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [294829974] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 23:33:14,896 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-13 23:33:14,896 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-13 23:33:14,897 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [237956344] [2024-11-13 23:33:14,897 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 23:33:14,898 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-13 23:33:14,898 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-13 23:33:14,899 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-13 23:33:14,899 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-13 23:33:14,900 INFO L87 Difference]: Start difference. First operand 8 states and 9 transitions. 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) [2024-11-13 23:33:14,948 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 23:33:14,948 INFO L93 Difference]: Finished difference Result 18 states and 21 transitions. [2024-11-13 23:33:14,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-13 23:33:14,949 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 [2024-11-13 23:33:14,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 23:33:14,950 INFO L225 Difference]: With dead ends: 18 [2024-11-13 23:33:14,950 INFO L226 Difference]: Without dead ends: 12 [2024-11-13 23:33:14,950 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 [2024-11-13 23:33:14,952 INFO L432 NwaCegarLoop]: 3 mSDtfsCounter, 2 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-13 23:33:14,952 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 6 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-13 23:33:14,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2024-11-13 23:33:14,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 9. [2024-11-13 23:33:14,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9 states, 8 states have (on average 1.25) internal successors, (10), 8 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) [2024-11-13 23:33:14,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 10 transitions. [2024-11-13 23:33:14,956 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 10 transitions. Word has length 7 [2024-11-13 23:33:14,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 23:33:14,957 INFO L471 AbstractCegarLoop]: Abstraction has 9 states and 10 transitions. [2024-11-13 23:33:14,957 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) [2024-11-13 23:33:14,957 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 10 transitions. [2024-11-13 23:33:14,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2024-11-13 23:33:14,958 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 23:33:14,958 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 23:33:14,958 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-13 23:33:14,958 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 23:33:14,959 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 23:33:14,959 INFO L85 PathProgramCache]: Analyzing trace with hash 1738264972, now seen corresponding path program 1 times [2024-11-13 23:33:14,959 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-13 23:33:14,959 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1821339640] [2024-11-13 23:33:14,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 23:33:14,959 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 23:33:14,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 23:33:15,136 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 23:33:15,136 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-13 23:33:15,136 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1821339640] [2024-11-13 23:33:15,137 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1821339640] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 23:33:15,137 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [472705157] [2024-11-13 23:33:15,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 23:33:15,137 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 23:33:15,138 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fbbee8f-8d44-4414-8f96-d3b0b7dbd49b/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-13 23:33:15,140 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fbbee8f-8d44-4414-8f96-d3b0b7dbd49b/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 23:33:15,143 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fbbee8f-8d44-4414-8f96-d3b0b7dbd49b/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-13 23:33:15,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 23:33:15,248 INFO L255 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-11-13 23:33:15,253 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 23:33:15,308 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 23:33:15,308 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 23:33:15,373 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 23:33:15,375 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [472705157] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 23:33:15,375 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [177919242] [2024-11-13 23:33:15,445 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2024-11-13 23:33:15,445 INFO L166 IcfgInterpreter]: Building call graph [2024-11-13 23:33:15,449 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-13 23:33:15,457 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-13 23:33:15,458 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-13 23:33:16,035 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-13 23:33:16,280 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSifa [177919242] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 23:33:16,281 INFO L185 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2024-11-13 23:33:16,281 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [3, 3, 3] total 11 [2024-11-13 23:33:16,282 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [4367084] [2024-11-13 23:33:16,282 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 23:33:16,282 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-13 23:33:16,282 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-13 23:33:16,283 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-13 23:33:16,287 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=81, Unknown=0, NotChecked=0, Total=132 [2024-11-13 23:33:16,287 INFO L87 Difference]: Start difference. First operand 9 states and 10 transitions. Second operand has 7 states, 7 states have (on average 1.1428571428571428) internal successors, (8), 6 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 23:33:16,363 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 23:33:16,364 INFO L93 Difference]: Finished difference Result 15 states and 16 transitions. [2024-11-13 23:33:16,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-13 23:33:16,365 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 1.1428571428571428) internal successors, (8), 6 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2024-11-13 23:33:16,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 23:33:16,365 INFO L225 Difference]: With dead ends: 15 [2024-11-13 23:33:16,365 INFO L226 Difference]: Without dead ends: 11 [2024-11-13 23:33:16,365 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=51, Invalid=81, Unknown=0, NotChecked=0, Total=132 [2024-11-13 23:33:16,366 INFO L432 NwaCegarLoop]: 2 mSDtfsCounter, 2 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 7 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-13 23:33:16,366 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 7 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-13 23:33:16,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2024-11-13 23:33:16,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2024-11-13 23:33:16,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11 states, 10 states have (on average 1.2) internal successors, (12), 10 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 23:33:16,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 12 transitions. [2024-11-13 23:33:16,374 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 12 transitions. Word has length 8 [2024-11-13 23:33:16,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 23:33:16,374 INFO L471 AbstractCegarLoop]: Abstraction has 11 states and 12 transitions. [2024-11-13 23:33:16,374 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 1.1428571428571428) internal successors, (8), 6 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 23:33:16,374 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 12 transitions. [2024-11-13 23:33:16,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2024-11-13 23:33:16,374 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 23:33:16,374 INFO L215 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 23:33:16,395 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fbbee8f-8d44-4414-8f96-d3b0b7dbd49b/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-11-13 23:33:16,575 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fbbee8f-8d44-4414-8f96-d3b0b7dbd49b/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 23:33:16,575 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 23:33:16,576 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 23:33:16,576 INFO L85 PathProgramCache]: Analyzing trace with hash -220965401, now seen corresponding path program 1 times [2024-11-13 23:33:16,576 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-13 23:33:16,576 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [472309028] [2024-11-13 23:33:16,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 23:33:16,576 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 23:33:16,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 23:33:16,639 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-13 23:33:16,639 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-13 23:33:16,640 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [472309028] [2024-11-13 23:33:16,640 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [472309028] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 23:33:16,640 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1523875939] [2024-11-13 23:33:16,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 23:33:16,640 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 23:33:16,640 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fbbee8f-8d44-4414-8f96-d3b0b7dbd49b/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-13 23:33:16,642 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fbbee8f-8d44-4414-8f96-d3b0b7dbd49b/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 23:33:16,644 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fbbee8f-8d44-4414-8f96-d3b0b7dbd49b/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-13 23:33:16,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 23:33:16,710 INFO L255 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-11-13 23:33:16,711 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 23:33:16,727 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-13 23:33:16,727 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 23:33:16,751 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-13 23:33:16,752 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1523875939] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 23:33:16,752 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [390410911] [2024-11-13 23:33:16,754 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2024-11-13 23:33:16,754 INFO L166 IcfgInterpreter]: Building call graph [2024-11-13 23:33:16,754 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-13 23:33:16,754 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-13 23:33:16,754 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-13 23:33:17,054 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-13 23:33:17,185 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '232#(and (<= 1 |#StackHeapBarrier|) (exists ((|v_ULTIMATE.start_main_~i~0#1_42| Int)) (and (= (select (select |#memory_int| |ULTIMATE.start_main_~#A~0#1.base|) (* |v_ULTIMATE.start_main_~i~0#1_42| 4)) 0) (<= 1025 |v_ULTIMATE.start_main_~i~0#1_42|))) (<= 2 |ULTIMATE.start_main_~#A~0#1.base|) (= |ULTIMATE.start_main_~#A~0#1.offset| 0))' at error location [2024-11-13 23:33:17,185 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-13 23:33:17,185 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 23:33:17,185 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2024-11-13 23:33:17,186 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [382249814] [2024-11-13 23:33:17,186 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 23:33:17,186 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-13 23:33:17,186 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-13 23:33:17,187 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-13 23:33:17,187 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2024-11-13 23:33:17,187 INFO L87 Difference]: Start difference. First operand 11 states and 12 transitions. Second operand has 7 states, 7 states have (on average 2.0) internal successors, (14), 6 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 23:33:17,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 23:33:17,232 INFO L93 Difference]: Finished difference Result 31 states and 38 transitions. [2024-11-13 23:33:17,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-13 23:33:17,233 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.0) internal successors, (14), 6 states have internal predecessors, (14), 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 [2024-11-13 23:33:17,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 23:33:17,235 INFO L225 Difference]: With dead ends: 31 [2024-11-13 23:33:17,235 INFO L226 Difference]: Without dead ends: 23 [2024-11-13 23:33:17,235 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2024-11-13 23:33:17,236 INFO L432 NwaCegarLoop]: 3 mSDtfsCounter, 15 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 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, 0.0s IncrementalHoareTripleChecker+Time [2024-11-13 23:33:17,237 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 10 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-13 23:33:17,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2024-11-13 23:33:17,241 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 14. [2024-11-13 23:33:17,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14 states, 13 states have (on average 1.1538461538461537) internal successors, (15), 13 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) [2024-11-13 23:33:17,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 15 transitions. [2024-11-13 23:33:17,242 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 15 transitions. Word has length 10 [2024-11-13 23:33:17,242 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 23:33:17,242 INFO L471 AbstractCegarLoop]: Abstraction has 14 states and 15 transitions. [2024-11-13 23:33:17,243 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.0) internal successors, (14), 6 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 23:33:17,243 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 15 transitions. [2024-11-13 23:33:17,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2024-11-13 23:33:17,243 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 23:33:17,243 INFO L215 NwaCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 23:33:17,263 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fbbee8f-8d44-4414-8f96-d3b0b7dbd49b/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-11-13 23:33:17,444 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fbbee8f-8d44-4414-8f96-d3b0b7dbd49b/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 23:33:17,444 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 23:33:17,445 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 23:33:17,445 INFO L85 PathProgramCache]: Analyzing trace with hash -264806223, now seen corresponding path program 2 times [2024-11-13 23:33:17,445 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-13 23:33:17,445 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [249795603] [2024-11-13 23:33:17,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 23:33:17,445 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 23:33:17,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 23:33:17,652 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-11-13 23:33:17,653 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-13 23:33:17,653 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [249795603] [2024-11-13 23:33:17,653 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [249795603] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 23:33:17,653 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2033722209] [2024-11-13 23:33:17,653 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-13 23:33:17,653 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 23:33:17,653 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fbbee8f-8d44-4414-8f96-d3b0b7dbd49b/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-13 23:33:17,655 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fbbee8f-8d44-4414-8f96-d3b0b7dbd49b/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 23:33:17,659 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fbbee8f-8d44-4414-8f96-d3b0b7dbd49b/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-13 23:33:17,733 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-13 23:33:17,734 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-13 23:33:17,735 INFO L255 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-11-13 23:33:17,737 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 23:33:17,766 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-11-13 23:33:17,766 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 23:33:17,805 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-11-13 23:33:17,805 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2033722209] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 23:33:17,805 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1825584315] [2024-11-13 23:33:17,807 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2024-11-13 23:33:17,807 INFO L166 IcfgInterpreter]: Building call graph [2024-11-13 23:33:17,807 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-13 23:33:17,808 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-13 23:33:17,808 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-13 23:33:18,020 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-13 23:33:18,189 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '382#(and (<= 1 |#StackHeapBarrier|) (<= 2 |ULTIMATE.start_main_~#A~0#1.base|) (= |ULTIMATE.start_main_~#A~0#1.offset| 0) (exists ((|v_ULTIMATE.start_main_~i~0#1_54| Int)) (and (<= 1025 |v_ULTIMATE.start_main_~i~0#1_54|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#A~0#1.base|) (* |v_ULTIMATE.start_main_~i~0#1_54| 4)) 0))))' at error location [2024-11-13 23:33:18,189 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-13 23:33:18,189 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 23:33:18,189 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 9 [2024-11-13 23:33:18,189 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2106027554] [2024-11-13 23:33:18,189 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 23:33:18,190 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-11-13 23:33:18,190 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-13 23:33:18,190 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-11-13 23:33:18,190 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2024-11-13 23:33:18,191 INFO L87 Difference]: Start difference. First operand 14 states and 15 transitions. Second operand has 9 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 9 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) [2024-11-13 23:33:18,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 23:33:18,252 INFO L93 Difference]: Finished difference Result 26 states and 29 transitions. [2024-11-13 23:33:18,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-13 23:33:18,253 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 9 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 13 [2024-11-13 23:33:18,254 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 23:33:18,254 INFO L225 Difference]: With dead ends: 26 [2024-11-13 23:33:18,254 INFO L226 Difference]: Without dead ends: 20 [2024-11-13 23:33:18,254 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2024-11-13 23:33:18,255 INFO L432 NwaCegarLoop]: 3 mSDtfsCounter, 1 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 13 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-13 23:33:18,255 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 13 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-13 23:33:18,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2024-11-13 23:33:18,262 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2024-11-13 23:33:18,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 19 states have (on average 1.105263157894737) internal successors, (21), 19 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) [2024-11-13 23:33:18,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 21 transitions. [2024-11-13 23:33:18,265 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 21 transitions. Word has length 13 [2024-11-13 23:33:18,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 23:33:18,265 INFO L471 AbstractCegarLoop]: Abstraction has 20 states and 21 transitions. [2024-11-13 23:33:18,265 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 9 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) [2024-11-13 23:33:18,265 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 21 transitions. [2024-11-13 23:33:18,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2024-11-13 23:33:18,266 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 23:33:18,266 INFO L215 NwaCegarLoop]: trace histogram [5, 4, 4, 1, 1, 1, 1, 1, 1] [2024-11-13 23:33:18,286 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fbbee8f-8d44-4414-8f96-d3b0b7dbd49b/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-11-13 23:33:18,470 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fbbee8f-8d44-4414-8f96-d3b0b7dbd49b/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 23:33:18,470 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 23:33:18,471 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 23:33:18,471 INFO L85 PathProgramCache]: Analyzing trace with hash -1290736190, now seen corresponding path program 3 times [2024-11-13 23:33:18,471 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-13 23:33:18,471 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [643508909] [2024-11-13 23:33:18,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 23:33:18,471 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 23:33:18,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 23:33:18,643 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2024-11-13 23:33:18,643 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-13 23:33:18,643 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [643508909] [2024-11-13 23:33:18,643 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [643508909] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 23:33:18,643 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1917899823] [2024-11-13 23:33:18,644 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-13 23:33:18,644 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 23:33:18,644 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fbbee8f-8d44-4414-8f96-d3b0b7dbd49b/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-13 23:33:18,646 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fbbee8f-8d44-4414-8f96-d3b0b7dbd49b/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 23:33:18,648 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fbbee8f-8d44-4414-8f96-d3b0b7dbd49b/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-13 23:33:18,719 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-13 23:33:18,719 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-13 23:33:18,720 INFO L255 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-13 23:33:18,721 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 23:33:18,741 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2024-11-13 23:33:18,741 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 23:33:18,819 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2024-11-13 23:33:18,819 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1917899823] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 23:33:18,819 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1772401985] [2024-11-13 23:33:18,821 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2024-11-13 23:33:18,821 INFO L166 IcfgInterpreter]: Building call graph [2024-11-13 23:33:18,822 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-13 23:33:18,822 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-13 23:33:18,822 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-13 23:33:19,055 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-13 23:33:19,242 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '574#(and (<= 1 |#StackHeapBarrier|) (<= 2 |ULTIMATE.start_main_~#A~0#1.base|) (exists ((|v_ULTIMATE.start_main_~i~0#1_75| Int)) (and (<= 1025 |v_ULTIMATE.start_main_~i~0#1_75|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#A~0#1.base|) (* |v_ULTIMATE.start_main_~i~0#1_75| 4)) 0))) (= |ULTIMATE.start_main_~#A~0#1.offset| 0))' at error location [2024-11-13 23:33:19,242 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-13 23:33:19,243 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 23:33:19,243 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2024-11-13 23:33:19,243 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [671501477] [2024-11-13 23:33:19,243 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 23:33:19,243 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-11-13 23:33:19,243 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-13 23:33:19,244 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-11-13 23:33:19,244 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2024-11-13 23:33:19,245 INFO L87 Difference]: Start difference. First operand 20 states and 21 transitions. Second operand has 13 states, 13 states have (on average 1.5384615384615385) 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) [2024-11-13 23:33:19,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 23:33:19,371 INFO L93 Difference]: Finished difference Result 58 states and 71 transitions. [2024-11-13 23:33:19,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-11-13 23:33:19,371 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.5384615384615385) 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) Word has length 19 [2024-11-13 23:33:19,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 23:33:19,372 INFO L225 Difference]: With dead ends: 58 [2024-11-13 23:33:19,373 INFO L226 Difference]: Without dead ends: 44 [2024-11-13 23:33:19,373 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2024-11-13 23:33:19,374 INFO L432 NwaCegarLoop]: 3 mSDtfsCounter, 29 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 63 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-13 23:33:19,374 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 19 Invalid, 63 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-13 23:33:19,375 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2024-11-13 23:33:19,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 26. [2024-11-13 23:33:19,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 25 states have (on average 1.08) internal successors, (27), 25 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) [2024-11-13 23:33:19,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 27 transitions. [2024-11-13 23:33:19,388 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 27 transitions. Word has length 19 [2024-11-13 23:33:19,388 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 23:33:19,388 INFO L471 AbstractCegarLoop]: Abstraction has 26 states and 27 transitions. [2024-11-13 23:33:19,389 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.5384615384615385) 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) [2024-11-13 23:33:19,389 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 27 transitions. [2024-11-13 23:33:19,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2024-11-13 23:33:19,389 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 23:33:19,389 INFO L215 NwaCegarLoop]: trace histogram [10, 5, 4, 1, 1, 1, 1, 1, 1] [2024-11-13 23:33:19,415 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fbbee8f-8d44-4414-8f96-d3b0b7dbd49b/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-11-13 23:33:19,594 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fbbee8f-8d44-4414-8f96-d3b0b7dbd49b/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 23:33:19,595 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 23:33:19,596 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 23:33:19,601 INFO L85 PathProgramCache]: Analyzing trace with hash 133403138, now seen corresponding path program 4 times [2024-11-13 23:33:19,604 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-13 23:33:19,604 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [217483603] [2024-11-13 23:33:19,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 23:33:19,604 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 23:33:19,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 23:33:20,071 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2024-11-13 23:33:20,072 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-13 23:33:20,072 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [217483603] [2024-11-13 23:33:20,072 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [217483603] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 23:33:20,072 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [280818281] [2024-11-13 23:33:20,072 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-13 23:33:20,072 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 23:33:20,073 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fbbee8f-8d44-4414-8f96-d3b0b7dbd49b/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-13 23:33:20,075 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fbbee8f-8d44-4414-8f96-d3b0b7dbd49b/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 23:33:20,077 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fbbee8f-8d44-4414-8f96-d3b0b7dbd49b/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-13 23:33:20,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 23:33:20,185 INFO L255 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-11-13 23:33:20,187 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 23:33:20,245 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2024-11-13 23:33:20,245 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 23:33:20,580 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2024-11-13 23:33:20,580 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [280818281] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 23:33:20,581 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1883401323] [2024-11-13 23:33:20,582 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2024-11-13 23:33:20,583 INFO L166 IcfgInterpreter]: Building call graph [2024-11-13 23:33:20,583 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-13 23:33:20,583 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-13 23:33:20,583 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-13 23:33:20,772 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-13 23:33:20,985 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '875#(and (<= 1 |#StackHeapBarrier|) (<= 2 |ULTIMATE.start_main_~#A~0#1.base|) (= |ULTIMATE.start_main_~#A~0#1.offset| 0) (exists ((|v_ULTIMATE.start_main_~i~0#1_108| Int)) (and (<= 1025 |v_ULTIMATE.start_main_~i~0#1_108|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#A~0#1.base|) (* |v_ULTIMATE.start_main_~i~0#1_108| 4)) 0))))' at error location [2024-11-13 23:33:20,985 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-13 23:33:20,985 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 23:33:20,986 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 24 [2024-11-13 23:33:20,986 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2044837288] [2024-11-13 23:33:20,986 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 23:33:20,987 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2024-11-13 23:33:20,987 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-13 23:33:20,988 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2024-11-13 23:33:20,990 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=312, Invalid=558, Unknown=0, NotChecked=0, Total=870 [2024-11-13 23:33:20,990 INFO L87 Difference]: Start difference. First operand 26 states and 27 transitions. Second operand has 25 states, 25 states have (on average 1.28) internal successors, (32), 24 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 23:33:21,267 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 23:33:21,267 INFO L93 Difference]: Finished difference Result 106 states and 137 transitions. [2024-11-13 23:33:21,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2024-11-13 23:33:21,268 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.28) internal successors, (32), 24 states have internal predecessors, (32), 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 25 [2024-11-13 23:33:21,268 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 23:33:21,271 INFO L225 Difference]: With dead ends: 106 [2024-11-13 23:33:21,271 INFO L226 Difference]: Without dead ends: 92 [2024-11-13 23:33:21,272 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 207 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=312, Invalid=558, Unknown=0, NotChecked=0, Total=870 [2024-11-13 23:33:21,275 INFO L432 NwaCegarLoop]: 3 mSDtfsCounter, 100 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 80 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 100 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 137 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 80 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-13 23:33:21,276 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [100 Valid, 33 Invalid, 137 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 80 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-13 23:33:21,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2024-11-13 23:33:21,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 38. [2024-11-13 23:33:21,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 37 states have (on average 1.054054054054054) internal successors, (39), 37 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) [2024-11-13 23:33:21,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 39 transitions. [2024-11-13 23:33:21,298 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 39 transitions. Word has length 25 [2024-11-13 23:33:21,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 23:33:21,298 INFO L471 AbstractCegarLoop]: Abstraction has 38 states and 39 transitions. [2024-11-13 23:33:21,299 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.28) internal successors, (32), 24 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 23:33:21,299 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 39 transitions. [2024-11-13 23:33:21,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2024-11-13 23:33:21,300 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 23:33:21,300 INFO L215 NwaCegarLoop]: trace histogram [22, 5, 4, 1, 1, 1, 1, 1, 1] [2024-11-13 23:33:21,325 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fbbee8f-8d44-4414-8f96-d3b0b7dbd49b/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-11-13 23:33:21,505 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fbbee8f-8d44-4414-8f96-d3b0b7dbd49b/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 23:33:21,506 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 23:33:21,506 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 23:33:21,506 INFO L85 PathProgramCache]: Analyzing trace with hash 94915202, now seen corresponding path program 5 times [2024-11-13 23:33:21,506 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-13 23:33:21,507 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1199795655] [2024-11-13 23:33:21,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 23:33:21,507 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 23:33:21,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 23:33:22,389 INFO L134 CoverageAnalysis]: Checked inductivity of 273 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2024-11-13 23:33:22,389 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-13 23:33:22,389 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1199795655] [2024-11-13 23:33:22,391 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1199795655] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 23:33:22,391 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1931341509] [2024-11-13 23:33:22,391 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-13 23:33:22,391 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 23:33:22,392 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fbbee8f-8d44-4414-8f96-d3b0b7dbd49b/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-13 23:33:22,394 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fbbee8f-8d44-4414-8f96-d3b0b7dbd49b/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 23:33:22,396 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fbbee8f-8d44-4414-8f96-d3b0b7dbd49b/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-13 23:33:22,530 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2024-11-13 23:33:22,530 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-13 23:33:22,531 INFO L255 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-13 23:33:22,533 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 23:33:22,587 INFO L134 CoverageAnalysis]: Checked inductivity of 273 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 253 trivial. 0 not checked. [2024-11-13 23:33:22,587 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 23:33:22,796 INFO L134 CoverageAnalysis]: Checked inductivity of 273 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 253 trivial. 0 not checked. [2024-11-13 23:33:22,796 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1931341509] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 23:33:22,796 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2139231847] [2024-11-13 23:33:22,798 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2024-11-13 23:33:22,798 INFO L166 IcfgInterpreter]: Building call graph [2024-11-13 23:33:22,798 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-13 23:33:22,798 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-13 23:33:22,799 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-13 23:33:22,952 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-13 23:33:23,174 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1351#(and (<= 1 |#StackHeapBarrier|) (exists ((|v_ULTIMATE.start_main_~i~0#1_126| Int)) (and (<= 1025 |v_ULTIMATE.start_main_~i~0#1_126|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#A~0#1.base|) (* |v_ULTIMATE.start_main_~i~0#1_126| 4)) 0))) (<= 2 |ULTIMATE.start_main_~#A~0#1.base|) (= |ULTIMATE.start_main_~#A~0#1.offset| 0))' at error location [2024-11-13 23:33:23,176 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-13 23:33:23,176 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 23:33:23,176 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 8, 8] total 32 [2024-11-13 23:33:23,176 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [250545212] [2024-11-13 23:33:23,176 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 23:33:23,177 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2024-11-13 23:33:23,177 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-13 23:33:23,178 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2024-11-13 23:33:23,180 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=479, Invalid=853, Unknown=0, NotChecked=0, Total=1332 [2024-11-13 23:33:23,180 INFO L87 Difference]: Start difference. First operand 38 states and 39 transitions. Second operand has 32 states, 32 states have (on average 1.78125) internal successors, (57), 32 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 23:33:23,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 23:33:23,420 INFO L93 Difference]: Finished difference Result 129 states and 158 transitions. [2024-11-13 23:33:23,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2024-11-13 23:33:23,420 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.78125) internal successors, (57), 32 states have internal predecessors, (57), 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 37 [2024-11-13 23:33:23,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 23:33:23,421 INFO L225 Difference]: With dead ends: 129 [2024-11-13 23:33:23,421 INFO L226 Difference]: Without dead ends: 90 [2024-11-13 23:33:23,422 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 97 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 267 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=479, Invalid=853, Unknown=0, NotChecked=0, Total=1332 [2024-11-13 23:33:23,423 INFO L432 NwaCegarLoop]: 3 mSDtfsCounter, 120 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 100 mSolverCounterSat, 58 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 120 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 158 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 100 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-13 23:33:23,423 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [120 Valid, 34 Invalid, 158 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [58 Valid, 100 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-13 23:33:23,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2024-11-13 23:33:23,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 90. [2024-11-13 23:33:23,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 89 states have (on average 1.0224719101123596) internal successors, (91), 89 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 23:33:23,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 91 transitions. [2024-11-13 23:33:23,450 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 91 transitions. Word has length 37 [2024-11-13 23:33:23,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 23:33:23,451 INFO L471 AbstractCegarLoop]: Abstraction has 90 states and 91 transitions. [2024-11-13 23:33:23,451 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 1.78125) internal successors, (57), 32 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 23:33:23,451 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 91 transitions. [2024-11-13 23:33:23,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2024-11-13 23:33:23,453 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 23:33:23,453 INFO L215 NwaCegarLoop]: trace histogram [29, 28, 26, 1, 1, 1, 1, 1, 1] [2024-11-13 23:33:23,473 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fbbee8f-8d44-4414-8f96-d3b0b7dbd49b/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-11-13 23:33:23,653 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fbbee8f-8d44-4414-8f96-d3b0b7dbd49b/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 23:33:23,654 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 23:33:23,654 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 23:33:23,654 INFO L85 PathProgramCache]: Analyzing trace with hash 770692490, now seen corresponding path program 6 times [2024-11-13 23:33:23,654 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-13 23:33:23,654 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [653779384] [2024-11-13 23:33:23,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 23:33:23,654 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 23:33:23,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 23:33:25,028 INFO L134 CoverageAnalysis]: Checked inductivity of 1163 backedges. 0 proven. 351 refuted. 0 times theorem prover too weak. 812 trivial. 0 not checked. [2024-11-13 23:33:25,029 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-13 23:33:25,029 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [653779384] [2024-11-13 23:33:25,029 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [653779384] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 23:33:25,029 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1868584033] [2024-11-13 23:33:25,029 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-13 23:33:25,029 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 23:33:25,029 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fbbee8f-8d44-4414-8f96-d3b0b7dbd49b/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-13 23:33:25,032 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fbbee8f-8d44-4414-8f96-d3b0b7dbd49b/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 23:33:25,050 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fbbee8f-8d44-4414-8f96-d3b0b7dbd49b/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-13 23:33:25,257 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-13 23:33:25,257 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-13 23:33:25,260 INFO L255 TraceCheckSpWp]: Trace formula consists of 423 conjuncts, 28 conjuncts are in the unsatisfiable core [2024-11-13 23:33:25,264 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 23:33:25,346 INFO L134 CoverageAnalysis]: Checked inductivity of 1163 backedges. 0 proven. 351 refuted. 0 times theorem prover too weak. 812 trivial. 0 not checked. [2024-11-13 23:33:25,346 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 23:33:26,512 INFO L134 CoverageAnalysis]: Checked inductivity of 1163 backedges. 0 proven. 351 refuted. 0 times theorem prover too weak. 812 trivial. 0 not checked. [2024-11-13 23:33:26,513 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1868584033] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 23:33:26,513 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1060534240] [2024-11-13 23:33:26,515 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2024-11-13 23:33:26,515 INFO L166 IcfgInterpreter]: Building call graph [2024-11-13 23:33:26,515 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-13 23:33:26,515 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-13 23:33:26,515 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-13 23:33:26,666 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-13 23:33:26,859 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2277#(and (<= 1 |#StackHeapBarrier|) (<= 2 |ULTIMATE.start_main_~#A~0#1.base|) (= |ULTIMATE.start_main_~#A~0#1.offset| 0) (exists ((|v_ULTIMATE.start_main_~i~0#1_215| Int)) (and (<= 1025 |v_ULTIMATE.start_main_~i~0#1_215|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#A~0#1.base|) (* |v_ULTIMATE.start_main_~i~0#1_215| 4)) 0))))' at error location [2024-11-13 23:33:26,859 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-13 23:33:26,859 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 23:33:26,859 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28, 28] total 56 [2024-11-13 23:33:26,859 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1903556248] [2024-11-13 23:33:26,859 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 23:33:26,860 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2024-11-13 23:33:26,860 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-13 23:33:26,861 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2024-11-13 23:33:26,863 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1608, Invalid=2174, Unknown=0, NotChecked=0, Total=3782 [2024-11-13 23:33:26,864 INFO L87 Difference]: Start difference. First operand 90 states and 91 transitions. Second operand has 57 states, 57 states have (on average 1.1228070175438596) internal successors, (64), 56 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) [2024-11-13 23:33:27,403 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 23:33:27,403 INFO L93 Difference]: Finished difference Result 258 states and 313 transitions. [2024-11-13 23:33:27,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2024-11-13 23:33:27,404 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 57 states have (on average 1.1228070175438596) internal successors, (64), 56 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) Word has length 89 [2024-11-13 23:33:27,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 23:33:27,405 INFO L225 Difference]: With dead ends: 258 [2024-11-13 23:33:27,406 INFO L226 Difference]: Without dead ends: 196 [2024-11-13 23:33:27,408 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 293 GetRequests, 233 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 511 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=1608, Invalid=2174, Unknown=0, NotChecked=0, Total=3782 [2024-11-13 23:33:27,409 INFO L432 NwaCegarLoop]: 3 mSDtfsCounter, 364 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 175 mSolverCounterSat, 238 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 364 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 413 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 238 IncrementalHoareTripleChecker+Valid, 175 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-13 23:33:27,409 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [364 Valid, 42 Invalid, 413 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [238 Valid, 175 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-13 23:33:27,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2024-11-13 23:33:27,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 118. [2024-11-13 23:33:27,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 118 states, 117 states have (on average 1.017094017094017) internal successors, (119), 117 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) [2024-11-13 23:33:27,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 119 transitions. [2024-11-13 23:33:27,439 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 119 transitions. Word has length 89 [2024-11-13 23:33:27,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 23:33:27,439 INFO L471 AbstractCegarLoop]: Abstraction has 118 states and 119 transitions. [2024-11-13 23:33:27,439 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 57 states, 57 states have (on average 1.1228070175438596) internal successors, (64), 56 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) [2024-11-13 23:33:27,440 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 119 transitions. [2024-11-13 23:33:27,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2024-11-13 23:33:27,442 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 23:33:27,442 INFO L215 NwaCegarLoop]: trace histogram [54, 29, 28, 1, 1, 1, 1, 1, 1] [2024-11-13 23:33:27,462 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fbbee8f-8d44-4414-8f96-d3b0b7dbd49b/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-11-13 23:33:27,646 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fbbee8f-8d44-4414-8f96-d3b0b7dbd49b/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2024-11-13 23:33:27,646 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 23:33:27,647 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 23:33:27,647 INFO L85 PathProgramCache]: Analyzing trace with hash -940899318, now seen corresponding path program 7 times [2024-11-13 23:33:27,647 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-13 23:33:27,647 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [889560874] [2024-11-13 23:33:27,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 23:33:27,647 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 23:33:27,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 23:33:30,868 INFO L134 CoverageAnalysis]: Checked inductivity of 2297 backedges. 0 proven. 1485 refuted. 0 times theorem prover too weak. 812 trivial. 0 not checked. [2024-11-13 23:33:30,868 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-13 23:33:30,868 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [889560874] [2024-11-13 23:33:30,869 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [889560874] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 23:33:30,869 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [980994555] [2024-11-13 23:33:30,869 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-13 23:33:30,869 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 23:33:30,869 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fbbee8f-8d44-4414-8f96-d3b0b7dbd49b/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-13 23:33:30,871 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fbbee8f-8d44-4414-8f96-d3b0b7dbd49b/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 23:33:30,872 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fbbee8f-8d44-4414-8f96-d3b0b7dbd49b/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-13 23:33:31,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 23:33:31,080 INFO L255 TraceCheckSpWp]: Trace formula consists of 675 conjuncts, 56 conjuncts are in the unsatisfiable core [2024-11-13 23:33:31,084 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 23:33:31,210 INFO L134 CoverageAnalysis]: Checked inductivity of 2297 backedges. 0 proven. 1485 refuted. 0 times theorem prover too weak. 812 trivial. 0 not checked. [2024-11-13 23:33:31,210 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 23:33:35,441 INFO L134 CoverageAnalysis]: Checked inductivity of 2297 backedges. 0 proven. 1485 refuted. 0 times theorem prover too weak. 812 trivial. 0 not checked. [2024-11-13 23:33:35,441 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [980994555] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 23:33:35,441 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1168183848] [2024-11-13 23:33:35,443 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2024-11-13 23:33:35,444 INFO L166 IcfgInterpreter]: Building call graph [2024-11-13 23:33:35,444 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-13 23:33:35,444 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-13 23:33:35,444 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-13 23:33:35,596 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-13 23:33:35,895 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3690#(and (<= 1 |#StackHeapBarrier|) (exists ((|v_ULTIMATE.start_main_~i~0#1_360| Int)) (and (<= 1025 |v_ULTIMATE.start_main_~i~0#1_360|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#A~0#1.base|) (* |v_ULTIMATE.start_main_~i~0#1_360| 4)) 0))) (<= 2 |ULTIMATE.start_main_~#A~0#1.base|) (= |ULTIMATE.start_main_~#A~0#1.offset| 0))' at error location [2024-11-13 23:33:35,896 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-13 23:33:35,896 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 23:33:35,896 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [56, 56, 56] total 112 [2024-11-13 23:33:35,896 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1078475095] [2024-11-13 23:33:35,896 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 23:33:35,897 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 113 states [2024-11-13 23:33:35,897 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-13 23:33:35,899 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 113 interpolants. [2024-11-13 23:33:35,901 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6340, Invalid=7466, Unknown=0, NotChecked=0, Total=13806 [2024-11-13 23:33:35,902 INFO L87 Difference]: Start difference. First operand 118 states and 119 transitions. Second operand has 113 states, 113 states have (on average 1.0619469026548674) internal successors, (120), 112 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 23:33:38,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 23:33:38,581 INFO L93 Difference]: Finished difference Result 482 states and 621 transitions. [2024-11-13 23:33:38,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 112 states. [2024-11-13 23:33:38,582 INFO L78 Accepts]: Start accepts. Automaton has has 113 states, 113 states have (on average 1.0619469026548674) internal successors, (120), 112 states have internal predecessors, (120), 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 117 [2024-11-13 23:33:38,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 23:33:38,587 INFO L225 Difference]: With dead ends: 482 [2024-11-13 23:33:38,589 INFO L226 Difference]: Without dead ends: 420 [2024-11-13 23:33:38,592 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 405 GetRequests, 289 SyntacticMatches, 0 SemanticMatches, 116 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1043 ImplicationChecksByTransitivity, 5.9s TimeCoverageRelationStatistics Valid=6340, Invalid=7466, Unknown=0, NotChecked=0, Total=13806 [2024-11-13 23:33:38,593 INFO L432 NwaCegarLoop]: 3 mSDtfsCounter, 895 mSDsluCounter, 94 mSDsCounter, 0 mSdLazyCounter, 340 mSolverCounterSat, 518 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 895 SdHoareTripleChecker+Valid, 97 SdHoareTripleChecker+Invalid, 858 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 518 IncrementalHoareTripleChecker+Valid, 340 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2024-11-13 23:33:38,593 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [895 Valid, 97 Invalid, 858 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [518 Valid, 340 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2024-11-13 23:33:38,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 420 states. [2024-11-13 23:33:38,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 420 to 174. [2024-11-13 23:33:38,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 174 states, 173 states have (on average 1.0115606936416186) internal successors, (175), 173 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 23:33:38,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 175 transitions. [2024-11-13 23:33:38,645 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 175 transitions. Word has length 117 [2024-11-13 23:33:38,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 23:33:38,645 INFO L471 AbstractCegarLoop]: Abstraction has 174 states and 175 transitions. [2024-11-13 23:33:38,646 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 113 states, 113 states have (on average 1.0619469026548674) internal successors, (120), 112 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 23:33:38,646 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 175 transitions. [2024-11-13 23:33:38,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2024-11-13 23:33:38,649 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 23:33:38,649 INFO L215 NwaCegarLoop]: trace histogram [110, 29, 28, 1, 1, 1, 1, 1, 1] [2024-11-13 23:33:38,668 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fbbee8f-8d44-4414-8f96-d3b0b7dbd49b/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-11-13 23:33:38,849 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fbbee8f-8d44-4414-8f96-d3b0b7dbd49b/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2024-11-13 23:33:38,850 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 23:33:38,850 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 23:33:38,850 INFO L85 PathProgramCache]: Analyzing trace with hash -1090182902, now seen corresponding path program 8 times [2024-11-13 23:33:38,850 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-13 23:33:38,850 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [695940722] [2024-11-13 23:33:38,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 23:33:38,851 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 23:33:39,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 23:33:49,624 INFO L134 CoverageAnalysis]: Checked inductivity of 6917 backedges. 0 proven. 6105 refuted. 0 times theorem prover too weak. 812 trivial. 0 not checked. [2024-11-13 23:33:49,624 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-13 23:33:49,625 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [695940722] [2024-11-13 23:33:49,625 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [695940722] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 23:33:49,625 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1027304169] [2024-11-13 23:33:49,625 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-13 23:33:49,625 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 23:33:49,625 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fbbee8f-8d44-4414-8f96-d3b0b7dbd49b/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-13 23:33:49,628 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fbbee8f-8d44-4414-8f96-d3b0b7dbd49b/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 23:33:49,630 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fbbee8f-8d44-4414-8f96-d3b0b7dbd49b/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-11-13 23:40:35,398 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 29 check-sat command(s) [2024-11-13 23:40:35,398 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-13 23:40:35,463 INFO L255 TraceCheckSpWp]: Trace formula consists of 693 conjuncts, 32 conjuncts are in the unsatisfiable core [2024-11-13 23:40:35,471 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 23:40:35,643 INFO L134 CoverageAnalysis]: Checked inductivity of 6917 backedges. 0 proven. 812 refuted. 0 times theorem prover too weak. 6105 trivial. 0 not checked. [2024-11-13 23:40:35,644 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 23:40:38,914 INFO L134 CoverageAnalysis]: Checked inductivity of 6917 backedges. 0 proven. 812 refuted. 0 times theorem prover too weak. 6105 trivial. 0 not checked. [2024-11-13 23:40:38,915 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1027304169] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 23:40:38,915 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [266443799] [2024-11-13 23:40:38,918 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2024-11-13 23:40:38,919 INFO L166 IcfgInterpreter]: Building call graph [2024-11-13 23:40:38,919 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-13 23:40:38,919 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-13 23:40:38,919 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-13 23:40:39,062 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-13 23:40:39,528 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '5918#(and (<= 1 |#StackHeapBarrier|) (exists ((|v_ULTIMATE.start_main_~i~0#1_426| Int)) (and (<= 1025 |v_ULTIMATE.start_main_~i~0#1_426|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#A~0#1.base|) (* |v_ULTIMATE.start_main_~i~0#1_426| 4)) 0))) (<= 2 |ULTIMATE.start_main_~#A~0#1.base|) (= |ULTIMATE.start_main_~#A~0#1.offset| 0))' at error location [2024-11-13 23:40:39,528 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-13 23:40:39,528 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 23:40:39,528 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [112, 32, 32] total 144 [2024-11-13 23:40:39,528 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1087766556] [2024-11-13 23:40:39,529 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 23:40:39,529 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 144 states [2024-11-13 23:40:39,529 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-13 23:40:39,533 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 144 interpolants. [2024-11-13 23:40:39,536 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10167, Invalid=11885, Unknown=0, NotChecked=0, Total=22052 [2024-11-13 23:40:39,537 INFO L87 Difference]: Start difference. First operand 174 states and 175 transitions. Second operand has 144 states, 144 states have (on average 1.6736111111111112) internal successors, (241), 144 states have internal predecessors, (241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 23:40:44,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 23:40:44,139 INFO L93 Difference]: Finished difference Result 601 states and 742 transitions. [2024-11-13 23:40:44,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 143 states. [2024-11-13 23:40:44,140 INFO L78 Accepts]: Start accepts. Automaton has has 144 states, 144 states have (on average 1.6736111111111112) internal successors, (241), 144 states have internal predecessors, (241), 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 173 [2024-11-13 23:40:44,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 23:40:44,143 INFO L225 Difference]: With dead ends: 601 [2024-11-13 23:40:44,143 INFO L226 Difference]: Without dead ends: 426 [2024-11-13 23:40:44,146 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 629 GetRequests, 481 SyntacticMatches, 1 SemanticMatches, 147 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1347 ImplicationChecksByTransitivity, 9.3s TimeCoverageRelationStatistics Valid=10167, Invalid=11885, Unknown=0, NotChecked=0, Total=22052 [2024-11-13 23:40:44,147 INFO L432 NwaCegarLoop]: 3 mSDtfsCounter, 805 mSDsluCounter, 125 mSDsCounter, 0 mSdLazyCounter, 434 mSolverCounterSat, 439 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 805 SdHoareTripleChecker+Valid, 128 SdHoareTripleChecker+Invalid, 873 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 439 IncrementalHoareTripleChecker+Valid, 434 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2024-11-13 23:40:44,147 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [805 Valid, 128 Invalid, 873 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [439 Valid, 434 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2024-11-13 23:40:44,148 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 426 states. [2024-11-13 23:40:44,414 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 426 to 426. [2024-11-13 23:40:44,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 426 states, 425 states have (on average 1.0047058823529411) internal successors, (427), 425 states have internal predecessors, (427), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 23:40:44,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 426 states to 426 states and 427 transitions. [2024-11-13 23:40:44,416 INFO L78 Accepts]: Start accepts. Automaton has 426 states and 427 transitions. Word has length 173 [2024-11-13 23:40:44,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 23:40:44,417 INFO L471 AbstractCegarLoop]: Abstraction has 426 states and 427 transitions. [2024-11-13 23:40:44,417 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 144 states, 144 states have (on average 1.6736111111111112) internal successors, (241), 144 states have internal predecessors, (241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 23:40:44,417 INFO L276 IsEmpty]: Start isEmpty. Operand 426 states and 427 transitions. [2024-11-13 23:40:44,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 426 [2024-11-13 23:40:44,425 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 23:40:44,425 INFO L215 NwaCegarLoop]: trace histogram [141, 140, 138, 1, 1, 1, 1, 1, 1] [2024-11-13 23:40:44,474 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fbbee8f-8d44-4414-8f96-d3b0b7dbd49b/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2024-11-13 23:40:44,626 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fbbee8f-8d44-4414-8f96-d3b0b7dbd49b/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2024-11-13 23:40:44,626 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 23:40:44,626 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 23:40:44,626 INFO L85 PathProgramCache]: Analyzing trace with hash 1427548506, now seen corresponding path program 9 times [2024-11-13 23:40:44,626 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-13 23:40:44,627 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1882915098] [2024-11-13 23:40:44,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 23:40:44,627 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 23:40:44,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 23:40:59,157 INFO L134 CoverageAnalysis]: Checked inductivity of 29331 backedges. 0 proven. 9591 refuted. 0 times theorem prover too weak. 19740 trivial. 0 not checked. [2024-11-13 23:40:59,157 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-13 23:40:59,157 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1882915098] [2024-11-13 23:40:59,157 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1882915098] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 23:40:59,157 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1236445699] [2024-11-13 23:40:59,157 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-13 23:40:59,158 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 23:40:59,158 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fbbee8f-8d44-4414-8f96-d3b0b7dbd49b/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-13 23:40:59,161 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fbbee8f-8d44-4414-8f96-d3b0b7dbd49b/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 23:40:59,163 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fbbee8f-8d44-4414-8f96-d3b0b7dbd49b/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-11-13 23:40:59,795 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-13 23:40:59,795 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-13 23:40:59,806 INFO L255 TraceCheckSpWp]: Trace formula consists of 1991 conjuncts, 140 conjuncts are in the unsatisfiable core [2024-11-13 23:40:59,818 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 23:41:00,122 INFO L134 CoverageAnalysis]: Checked inductivity of 29331 backedges. 0 proven. 9591 refuted. 0 times theorem prover too weak. 19740 trivial. 0 not checked. [2024-11-13 23:41:00,122 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 23:41:29,852 INFO L134 CoverageAnalysis]: Checked inductivity of 29331 backedges. 0 proven. 9591 refuted. 0 times theorem prover too weak. 19740 trivial. 0 not checked. [2024-11-13 23:41:29,853 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1236445699] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 23:41:29,853 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [685162179] [2024-11-13 23:41:29,855 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2024-11-13 23:41:29,855 INFO L166 IcfgInterpreter]: Building call graph [2024-11-13 23:41:29,855 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-13 23:41:29,855 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-13 23:41:29,856 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-13 23:41:29,993 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-13 23:41:30,647 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '10364#(and (exists ((|v_ULTIMATE.start_main_~i~0#1_851| Int)) (and (= (select (select |#memory_int| |ULTIMATE.start_main_~#A~0#1.base|) (* |v_ULTIMATE.start_main_~i~0#1_851| 4)) 0) (<= 1025 |v_ULTIMATE.start_main_~i~0#1_851|))) (<= 1 |#StackHeapBarrier|) (<= 2 |ULTIMATE.start_main_~#A~0#1.base|) (= |ULTIMATE.start_main_~#A~0#1.offset| 0))' at error location [2024-11-13 23:41:30,648 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-13 23:41:30,648 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 23:41:30,648 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [140, 140, 140] total 280 [2024-11-13 23:41:30,648 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [272884161] [2024-11-13 23:41:30,649 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 23:41:30,650 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 281 states [2024-11-13 23:41:30,650 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-13 23:41:30,663 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 281 interpolants. [2024-11-13 23:41:30,672 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39352, Invalid=42158, Unknown=0, NotChecked=0, Total=81510 [2024-11-13 23:41:30,673 INFO L87 Difference]: Start difference. First operand 426 states and 427 transitions. Second operand has 281 states, 281 states have (on average 1.0249110320284698) internal successors, (288), 280 states have internal predecessors, (288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 23:42:27,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 23:42:27,753 INFO L93 Difference]: Finished difference Result 1266 states and 1545 transitions. [2024-11-13 23:42:27,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 280 states. [2024-11-13 23:42:27,754 INFO L78 Accepts]: Start accepts. Automaton has has 281 states, 281 states have (on average 1.0249110320284698) internal successors, (288), 280 states have internal predecessors, (288), 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 425 [2024-11-13 23:42:27,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 23:42:27,759 INFO L225 Difference]: With dead ends: 1266 [2024-11-13 23:42:27,759 INFO L226 Difference]: Without dead ends: 980 [2024-11-13 23:42:27,764 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 1413 GetRequests, 1129 SyntacticMatches, 0 SemanticMatches, 284 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2639 ImplicationChecksByTransitivity, 38.0s TimeCoverageRelationStatistics Valid=39352, Invalid=42158, Unknown=0, NotChecked=0, Total=81510 [2024-11-13 23:42:27,765 INFO L432 NwaCegarLoop]: 3 mSDtfsCounter, 1870 mSDsluCounter, 158 mSDsCounter, 0 mSdLazyCounter, 848 mSolverCounterSat, 1303 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1870 SdHoareTripleChecker+Valid, 161 SdHoareTripleChecker+Invalid, 2151 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1303 IncrementalHoareTripleChecker+Valid, 848 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2024-11-13 23:42:27,765 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [1870 Valid, 161 Invalid, 2151 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1303 Valid, 848 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2024-11-13 23:42:27,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 980 states. [2024-11-13 23:42:28,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 980 to 566. [2024-11-13 23:42:28,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 566 states, 565 states have (on average 1.0035398230088495) internal successors, (567), 565 states have internal predecessors, (567), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 23:42:28,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 566 states to 566 states and 567 transitions. [2024-11-13 23:42:28,161 INFO L78 Accepts]: Start accepts. Automaton has 566 states and 567 transitions. Word has length 425 [2024-11-13 23:42:28,162 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 23:42:28,162 INFO L471 AbstractCegarLoop]: Abstraction has 566 states and 567 transitions. [2024-11-13 23:42:28,162 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 281 states, 281 states have (on average 1.0249110320284698) internal successors, (288), 280 states have internal predecessors, (288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 23:42:28,163 INFO L276 IsEmpty]: Start isEmpty. Operand 566 states and 567 transitions. [2024-11-13 23:42:28,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 566 [2024-11-13 23:42:28,178 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 23:42:28,178 INFO L215 NwaCegarLoop]: trace histogram [278, 141, 140, 1, 1, 1, 1, 1, 1] [2024-11-13 23:42:28,209 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fbbee8f-8d44-4414-8f96-d3b0b7dbd49b/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2024-11-13 23:42:28,378 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fbbee8f-8d44-4414-8f96-d3b0b7dbd49b/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2024-11-13 23:42:28,379 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 23:42:28,379 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 23:42:28,379 INFO L85 PathProgramCache]: Analyzing trace with hash 232133082, now seen corresponding path program 10 times [2024-11-13 23:42:28,379 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-13 23:42:28,380 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [757991565] [2024-11-13 23:42:28,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 23:42:28,380 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 23:42:29,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 23:43:26,879 INFO L134 CoverageAnalysis]: Checked inductivity of 58521 backedges. 0 proven. 38781 refuted. 0 times theorem prover too weak. 19740 trivial. 0 not checked. [2024-11-13 23:43:26,879 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-13 23:43:26,879 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [757991565] [2024-11-13 23:43:26,880 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [757991565] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 23:43:26,880 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1052696318] [2024-11-13 23:43:26,880 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-13 23:43:26,880 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 23:43:26,880 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fbbee8f-8d44-4414-8f96-d3b0b7dbd49b/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-13 23:43:26,883 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fbbee8f-8d44-4414-8f96-d3b0b7dbd49b/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 23:43:26,884 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fbbee8f-8d44-4414-8f96-d3b0b7dbd49b/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-11-13 23:43:27,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 23:43:27,746 INFO L255 TraceCheckSpWp]: Trace formula consists of 3251 conjuncts, 280 conjuncts are in the unsatisfiable core [2024-11-13 23:43:27,760 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 23:43:28,246 INFO L134 CoverageAnalysis]: Checked inductivity of 58521 backedges. 0 proven. 38781 refuted. 0 times theorem prover too weak. 19740 trivial. 0 not checked. [2024-11-13 23:43:28,247 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 23:45:09,595 INFO L134 CoverageAnalysis]: Checked inductivity of 58521 backedges. 0 proven. 38781 refuted. 0 times theorem prover too weak. 19740 trivial. 0 not checked. [2024-11-13 23:45:09,595 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1052696318] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 23:45:09,595 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [966465058] [2024-11-13 23:45:09,596 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2024-11-13 23:45:09,596 INFO L166 IcfgInterpreter]: Building call graph [2024-11-13 23:45:09,596 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-13 23:45:09,596 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-13 23:45:09,597 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-13 23:45:09,690 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-13 23:45:10,709 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '17265#(and (<= 1 |#StackHeapBarrier|) (<= 2 |ULTIMATE.start_main_~#A~0#1.base|) (exists ((|v_ULTIMATE.start_main_~i~0#1_1556| Int)) (and (<= 1025 |v_ULTIMATE.start_main_~i~0#1_1556|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#A~0#1.base|) (* |v_ULTIMATE.start_main_~i~0#1_1556| 4)) 0))) (= |ULTIMATE.start_main_~#A~0#1.offset| 0))' at error location [2024-11-13 23:45:10,709 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-13 23:45:10,709 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 23:45:10,709 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [280, 280, 280] total 560 [2024-11-13 23:45:10,709 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [127195256] [2024-11-13 23:45:10,709 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 23:45:10,711 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 561 states [2024-11-13 23:45:10,711 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-13 23:45:10,746 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 561 interpolants. [2024-11-13 23:45:10,758 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=157092, Invalid=162698, Unknown=0, NotChecked=0, Total=319790 [2024-11-13 23:45:10,759 INFO L87 Difference]: Start difference. First operand 566 states and 567 transitions. Second operand has 561 states, 561 states have (on average 1.0124777183600713) internal successors, (568), 560 states have internal predecessors, (568), 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)