./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-examples/sanfoundry_10_ground.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 826ab2ba Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c994953f-a21f-411e-8c2a-d10bed0103b6/bin/utaipan-verify-sOmjnqqW8E/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c994953f-a21f-411e-8c2a-d10bed0103b6/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_c994953f-a21f-411e-8c2a-d10bed0103b6/bin/utaipan-verify-sOmjnqqW8E/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c994953f-a21f-411e-8c2a-d10bed0103b6/bin/utaipan-verify-sOmjnqqW8E/config/TaipanReach.xml -i ../../sv-benchmarks/c/array-examples/sanfoundry_10_ground.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c994953f-a21f-411e-8c2a-d10bed0103b6/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_c994953f-a21f-411e-8c2a-d10bed0103b6/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 2638891780f697dd700286595ba75a607e61cda7473ecc330660e8dbb3e9ba64 --- Real Ultimate output --- This is Ultimate 0.3.0-dev-826ab2b [2024-11-13 23:37:43,477 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-13 23:37:43,542 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c994953f-a21f-411e-8c2a-d10bed0103b6/bin/utaipan-verify-sOmjnqqW8E/config/svcomp-Reach-32bit-Taipan_Default.epf [2024-11-13 23:37:43,547 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-13 23:37:43,547 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-13 23:37:43,586 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-13 23:37:43,587 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-13 23:37:43,587 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-13 23:37:43,587 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-13 23:37:43,587 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-13 23:37:43,587 INFO L153 SettingsManager]: * User list type=DISABLED [2024-11-13 23:37:43,587 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2024-11-13 23:37:43,588 INFO L153 SettingsManager]: * Explicit value domain=true [2024-11-13 23:37:43,588 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2024-11-13 23:37:43,588 INFO L153 SettingsManager]: * Octagon Domain=false [2024-11-13 23:37:43,588 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2024-11-13 23:37:43,589 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2024-11-13 23:37:43,590 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2024-11-13 23:37:43,590 INFO L153 SettingsManager]: * Interval Domain=false [2024-11-13 23:37:43,591 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2024-11-13 23:37:43,591 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2024-11-13 23:37:43,591 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2024-11-13 23:37:43,592 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-13 23:37:43,592 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-13 23:37:43,592 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-13 23:37:43,592 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-13 23:37:43,592 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-13 23:37:43,592 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-13 23:37:43,592 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-13 23:37:43,593 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-13 23:37:43,593 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-13 23:37:43,593 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-13 23:37:43,593 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-13 23:37:43,593 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-13 23:37:43,593 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-13 23:37:43,593 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-13 23:37:43,593 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-13 23:37:43,593 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-13 23:37:43,593 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2024-11-13 23:37:43,594 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-13 23:37:43,594 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-13 23:37:43,594 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-13 23:37:43,594 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2024-11-13 23:37:43,595 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-13 23:37:43,595 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-13 23:37:43,596 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2024-11-13 23:37:43,596 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-13 23:37:43,596 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_c994953f-a21f-411e-8c2a-d10bed0103b6/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 -> 2638891780f697dd700286595ba75a607e61cda7473ecc330660e8dbb3e9ba64 [2024-11-13 23:37:43,892 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-13 23:37:43,903 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-13 23:37:43,907 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-13 23:37:43,909 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-13 23:37:43,909 INFO L274 PluginConnector]: CDTParser initialized [2024-11-13 23:37:43,912 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c994953f-a21f-411e-8c2a-d10bed0103b6/bin/utaipan-verify-sOmjnqqW8E/../../sv-benchmarks/c/array-examples/sanfoundry_10_ground.c Unable to find full path for "g++" [2024-11-13 23:37:45,880 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-13 23:37:46,183 INFO L384 CDTParser]: Found 1 translation units. [2024-11-13 23:37:46,184 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c994953f-a21f-411e-8c2a-d10bed0103b6/sv-benchmarks/c/array-examples/sanfoundry_10_ground.c [2024-11-13 23:37:46,192 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c994953f-a21f-411e-8c2a-d10bed0103b6/bin/utaipan-verify-sOmjnqqW8E/data/49b0fb699/8b89aa5348fa4ba48e882885dddde92b/FLAG3a0ddb22e [2024-11-13 23:37:46,207 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c994953f-a21f-411e-8c2a-d10bed0103b6/bin/utaipan-verify-sOmjnqqW8E/data/49b0fb699/8b89aa5348fa4ba48e882885dddde92b [2024-11-13 23:37:46,210 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-13 23:37:46,212 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-13 23:37:46,213 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-13 23:37:46,213 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-13 23:37:46,219 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-13 23:37:46,220 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.11 11:37:46" (1/1) ... [2024-11-13 23:37:46,221 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@206beef6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 11:37:46, skipping insertion in model container [2024-11-13 23:37:46,221 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.11 11:37:46" (1/1) ... [2024-11-13 23:37:46,240 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-13 23:37:46,412 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_c994953f-a21f-411e-8c2a-d10bed0103b6/sv-benchmarks/c/array-examples/sanfoundry_10_ground.c[324,337] [2024-11-13 23:37:46,440 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-13 23:37:46,451 INFO L200 MainTranslator]: Completed pre-run [2024-11-13 23:37:46,464 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_c994953f-a21f-411e-8c2a-d10bed0103b6/sv-benchmarks/c/array-examples/sanfoundry_10_ground.c[324,337] [2024-11-13 23:37:46,478 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-13 23:37:46,501 INFO L204 MainTranslator]: Completed translation [2024-11-13 23:37:46,502 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 11:37:46 WrapperNode [2024-11-13 23:37:46,502 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-13 23:37:46,503 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-13 23:37:46,503 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-13 23:37:46,504 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-13 23:37:46,512 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 11:37:46" (1/1) ... [2024-11-13 23:37:46,521 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 11:37:46" (1/1) ... [2024-11-13 23:37:46,547 INFO L138 Inliner]: procedures = 14, calls = 16, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 77 [2024-11-13 23:37:46,549 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-13 23:37:46,550 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-13 23:37:46,550 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-13 23:37:46,550 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-13 23:37:46,558 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 11:37:46" (1/1) ... [2024-11-13 23:37:46,559 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 11:37:46" (1/1) ... [2024-11-13 23:37:46,560 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 11:37:46" (1/1) ... [2024-11-13 23:37:46,561 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 11:37:46" (1/1) ... [2024-11-13 23:37:46,570 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 11:37:46" (1/1) ... [2024-11-13 23:37:46,578 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 11:37:46" (1/1) ... [2024-11-13 23:37:46,579 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 11:37:46" (1/1) ... [2024-11-13 23:37:46,580 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 11:37:46" (1/1) ... [2024-11-13 23:37:46,587 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-13 23:37:46,588 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-13 23:37:46,588 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-13 23:37:46,588 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-13 23:37:46,589 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 11:37:46" (1/1) ... [2024-11-13 23:37:46,604 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2024-11-13 23:37:46,625 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c994953f-a21f-411e-8c2a-d10bed0103b6/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-13 23:37:46,641 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c994953f-a21f-411e-8c2a-d10bed0103b6/bin/utaipan-verify-sOmjnqqW8E/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2024-11-13 23:37:46,649 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c994953f-a21f-411e-8c2a-d10bed0103b6/bin/utaipan-verify-sOmjnqqW8E/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2024-11-13 23:37:46,676 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-13 23:37:46,677 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2024-11-13 23:37:46,677 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-11-13 23:37:46,677 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2024-11-13 23:37:46,677 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-13 23:37:46,678 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-13 23:37:46,678 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2024-11-13 23:37:46,678 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-11-13 23:37:46,777 INFO L238 CfgBuilder]: Building ICFG [2024-11-13 23:37:46,779 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-13 23:37:46,961 INFO L? ?]: Removed 14 outVars from TransFormulas that were not future-live. [2024-11-13 23:37:46,961 INFO L287 CfgBuilder]: Performing block encoding [2024-11-13 23:37:47,035 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-13 23:37:47,035 INFO L316 CfgBuilder]: Removed 4 assume(true) statements. [2024-11-13 23:37:47,036 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.11 11:37:47 BoogieIcfgContainer [2024-11-13 23:37:47,036 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-13 23:37:47,039 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-13 23:37:47,039 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-13 23:37:47,046 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-13 23:37:47,046 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.11 11:37:46" (1/3) ... [2024-11-13 23:37:47,048 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@36c840cb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.11 11:37:47, skipping insertion in model container [2024-11-13 23:37:47,048 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 11:37:46" (2/3) ... [2024-11-13 23:37:47,049 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@36c840cb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.11 11:37:47, skipping insertion in model container [2024-11-13 23:37:47,050 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.11 11:37:47" (3/3) ... [2024-11-13 23:37:47,052 INFO L112 eAbstractionObserver]: Analyzing ICFG sanfoundry_10_ground.c [2024-11-13 23:37:47,071 INFO L217 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-13 23:37:47,073 INFO L154 ceAbstractionStarter]: Applying trace abstraction to ICFG sanfoundry_10_ground.c that has 1 procedures, 13 locations, 1 initial locations, 4 loop locations, and 1 error locations. [2024-11-13 23:37:47,149 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-13 23:37:47,164 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;@7212fc0f, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-13 23:37:47,165 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-11-13 23:37:47,170 INFO L276 IsEmpty]: Start isEmpty. Operand has 13 states, 11 states have (on average 1.7272727272727273) internal successors, (19), 12 states have internal predecessors, (19), 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 23:37:47,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2024-11-13 23:37:47,179 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 23:37:47,179 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 23:37:47,180 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 23:37:47,184 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 23:37:47,186 INFO L85 PathProgramCache]: Analyzing trace with hash 1862250893, now seen corresponding path program 1 times [2024-11-13 23:37:47,195 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-13 23:37:47,195 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1695363946] [2024-11-13 23:37:47,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 23:37:47,197 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 23:37:47,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 23:37:47,512 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 23:37:47,513 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-13 23:37:47,513 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1695363946] [2024-11-13 23:37:47,514 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1695363946] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 23:37:47,514 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-13 23:37:47,514 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-13 23:37:47,516 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1113443519] [2024-11-13 23:37:47,517 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 23:37:47,523 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-13 23:37:47,523 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-13 23:37:47,546 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-13 23:37:47,547 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-13 23:37:47,549 INFO L87 Difference]: Start difference. First operand has 13 states, 11 states have (on average 1.7272727272727273) internal successors, (19), 12 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 2 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 23:37:47,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 23:37:47,626 INFO L93 Difference]: Finished difference Result 25 states and 37 transitions. [2024-11-13 23:37:47,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-13 23:37:47,630 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 2 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 23:37:47,630 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 23:37:47,638 INFO L225 Difference]: With dead ends: 25 [2024-11-13 23:37:47,639 INFO L226 Difference]: Without dead ends: 12 [2024-11-13 23:37:47,645 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 23:37:47,651 INFO L432 NwaCegarLoop]: 10 mSDtfsCounter, 0 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-13 23:37:47,652 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 18 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-13 23:37:47,668 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2024-11-13 23:37:47,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2024-11-13 23:37:47,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 11 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 23:37:47,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 16 transitions. [2024-11-13 23:37:47,683 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 16 transitions. Word has length 8 [2024-11-13 23:37:47,684 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 23:37:47,684 INFO L471 AbstractCegarLoop]: Abstraction has 12 states and 16 transitions. [2024-11-13 23:37:47,684 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 2 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 23:37:47,684 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 16 transitions. [2024-11-13 23:37:47,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2024-11-13 23:37:47,684 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 23:37:47,685 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 23:37:47,685 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-13 23:37:47,685 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 23:37:47,686 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 23:37:47,686 INFO L85 PathProgramCache]: Analyzing trace with hash 1107223911, now seen corresponding path program 1 times [2024-11-13 23:37:47,686 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-13 23:37:47,686 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [221139183] [2024-11-13 23:37:47,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 23:37:47,686 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 23:37:47,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 23:37:47,931 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-13 23:37:47,932 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-13 23:37:47,932 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [221139183] [2024-11-13 23:37:47,932 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [221139183] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 23:37:47,932 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-13 23:37:47,932 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-13 23:37:47,932 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [927407371] [2024-11-13 23:37:47,932 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 23:37:47,933 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-13 23:37:47,934 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-13 23:37:47,938 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-13 23:37:47,938 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-13 23:37:47,939 INFO L87 Difference]: Start difference. First operand 12 states and 16 transitions. Second operand has 4 states, 4 states have (on average 2.25) internal successors, (9), 3 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 23:37:47,993 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 23:37:47,994 INFO L93 Difference]: Finished difference Result 21 states and 28 transitions. [2024-11-13 23:37:47,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-13 23:37:47,995 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 3 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) Word has length 9 [2024-11-13 23:37:47,995 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 23:37:47,995 INFO L225 Difference]: With dead ends: 21 [2024-11-13 23:37:47,995 INFO L226 Difference]: Without dead ends: 13 [2024-11-13 23:37:47,996 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-13 23:37:47,997 INFO L432 NwaCegarLoop]: 9 mSDtfsCounter, 0 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-13 23:37:47,997 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 19 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-13 23:37:47,998 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2024-11-13 23:37:48,002 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2024-11-13 23:37:48,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13 states, 12 states have (on average 1.4166666666666667) internal successors, (17), 12 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 23:37:48,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 17 transitions. [2024-11-13 23:37:48,006 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 17 transitions. Word has length 9 [2024-11-13 23:37:48,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 23:37:48,006 INFO L471 AbstractCegarLoop]: Abstraction has 13 states and 17 transitions. [2024-11-13 23:37:48,006 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 3 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 23:37:48,006 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 17 transitions. [2024-11-13 23:37:48,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2024-11-13 23:37:48,007 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 23:37:48,007 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 23:37:48,007 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-13 23:37:48,007 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 23:37:48,009 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 23:37:48,009 INFO L85 PathProgramCache]: Analyzing trace with hash -612910085, now seen corresponding path program 1 times [2024-11-13 23:37:48,009 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-13 23:37:48,009 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [842984082] [2024-11-13 23:37:48,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 23:37:48,013 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 23:37:48,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 23:37:48,079 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-13 23:37:48,079 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-13 23:37:48,079 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [842984082] [2024-11-13 23:37:48,079 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [842984082] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 23:37:48,079 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-13 23:37:48,079 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-13 23:37:48,080 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1722035524] [2024-11-13 23:37:48,080 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 23:37:48,080 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-13 23:37:48,080 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-13 23:37:48,080 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-13 23:37:48,081 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-13 23:37:48,081 INFO L87 Difference]: Start difference. First operand 13 states and 17 transitions. Second operand has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 23:37:48,101 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 23:37:48,101 INFO L93 Difference]: Finished difference Result 19 states and 23 transitions. [2024-11-13 23:37:48,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-13 23:37:48,101 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2024-11-13 23:37:48,102 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 23:37:48,102 INFO L225 Difference]: With dead ends: 19 [2024-11-13 23:37:48,102 INFO L226 Difference]: Without dead ends: 13 [2024-11-13 23:37:48,102 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 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 23:37:48,103 INFO L432 NwaCegarLoop]: 10 mSDtfsCounter, 2 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 16 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 23:37:48,103 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 16 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-13 23:37:48,104 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2024-11-13 23:37:48,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2024-11-13 23:37:48,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13 states, 12 states have (on average 1.3333333333333333) internal successors, (16), 12 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 23:37:48,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 16 transitions. [2024-11-13 23:37:48,107 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 16 transitions. Word has length 10 [2024-11-13 23:37:48,107 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 23:37:48,107 INFO L471 AbstractCegarLoop]: Abstraction has 13 states and 16 transitions. [2024-11-13 23:37:48,107 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 23:37:48,107 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 16 transitions. [2024-11-13 23:37:48,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2024-11-13 23:37:48,108 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 23:37:48,108 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 23:37:48,108 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-11-13 23:37:48,108 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 23:37:48,109 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 23:37:48,109 INFO L85 PathProgramCache]: Analyzing trace with hash 2140068035, now seen corresponding path program 1 times [2024-11-13 23:37:48,109 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-13 23:37:48,109 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [14969174] [2024-11-13 23:37:48,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 23:37:48,109 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 23:37:48,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 23:37:48,243 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-13 23:37:48,243 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-13 23:37:48,244 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [14969174] [2024-11-13 23:37:48,244 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [14969174] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 23:37:48,244 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1342941603] [2024-11-13 23:37:48,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 23:37:48,245 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 23:37:48,245 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c994953f-a21f-411e-8c2a-d10bed0103b6/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-13 23:37:48,248 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c994953f-a21f-411e-8c2a-d10bed0103b6/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 23:37:48,249 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c994953f-a21f-411e-8c2a-d10bed0103b6/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-13 23:37:48,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 23:37:48,347 INFO L255 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-11-13 23:37:48,352 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 23:37:48,441 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-13 23:37:48,442 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 23:37:48,489 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-13 23:37:48,490 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1342941603] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 23:37:48,490 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [390410911] [2024-11-13 23:37:48,516 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2024-11-13 23:37:48,516 INFO L166 IcfgInterpreter]: Building call graph [2024-11-13 23:37:48,519 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-13 23:37:48,524 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-13 23:37:48,525 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-13 23:37:49,160 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-13 23:37:49,373 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '239#(and (<= 1 |ULTIMATE.start_main_~pos~0#1|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#vectorx~0#1.base|) |ULTIMATE.start_main_~#vectorx~0#1.offset|) |ULTIMATE.start_main_~element~0#1|) (= |ULTIMATE.start_main_~x~0#1| 0))' at error location [2024-11-13 23:37:49,373 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-13 23:37:49,373 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 23:37:49,373 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 7 [2024-11-13 23:37:49,373 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1841081683] [2024-11-13 23:37:49,374 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 23:37:49,374 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-13 23:37:49,375 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-13 23:37:49,376 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-13 23:37:49,378 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2024-11-13 23:37:49,378 INFO L87 Difference]: Start difference. First operand 13 states and 16 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 7 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 23:37:49,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 23:37:49,448 INFO L93 Difference]: Finished difference Result 27 states and 36 transitions. [2024-11-13 23:37:49,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-13 23:37:49,450 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 7 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2024-11-13 23:37:49,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 23:37:49,450 INFO L225 Difference]: With dead ends: 27 [2024-11-13 23:37:49,450 INFO L226 Difference]: Without dead ends: 17 [2024-11-13 23:37:49,450 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2024-11-13 23:37:49,451 INFO L432 NwaCegarLoop]: 8 mSDtfsCounter, 0 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-13 23:37:49,452 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 26 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-13 23:37:49,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2024-11-13 23:37:49,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 16. [2024-11-13 23:37:49,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 15 states have (on average 1.2666666666666666) internal successors, (19), 15 states have internal predecessors, (19), 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 23:37:49,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 19 transitions. [2024-11-13 23:37:49,459 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 19 transitions. Word has length 11 [2024-11-13 23:37:49,459 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 23:37:49,459 INFO L471 AbstractCegarLoop]: Abstraction has 16 states and 19 transitions. [2024-11-13 23:37:49,460 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 7 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 23:37:49,460 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 19 transitions. [2024-11-13 23:37:49,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2024-11-13 23:37:49,461 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 23:37:49,461 INFO L215 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 23:37:49,483 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c994953f-a21f-411e-8c2a-d10bed0103b6/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-13 23:37:49,665 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c994953f-a21f-411e-8c2a-d10bed0103b6/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 23:37:49,666 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 23:37:49,667 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 23:37:49,667 INFO L85 PathProgramCache]: Analyzing trace with hash 897104361, now seen corresponding path program 2 times [2024-11-13 23:37:49,667 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-13 23:37:49,667 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1409768767] [2024-11-13 23:37:49,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 23:37:49,668 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 23:37:49,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 23:37:49,968 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-13 23:37:49,969 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-13 23:37:49,969 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1409768767] [2024-11-13 23:37:49,969 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1409768767] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 23:37:49,969 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2029250913] [2024-11-13 23:37:49,969 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-13 23:37:49,969 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 23:37:49,969 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c994953f-a21f-411e-8c2a-d10bed0103b6/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-13 23:37:49,972 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c994953f-a21f-411e-8c2a-d10bed0103b6/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 23:37:49,974 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c994953f-a21f-411e-8c2a-d10bed0103b6/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-13 23:37:50,065 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-13 23:37:50,065 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-13 23:37:50,066 INFO L255 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-13 23:37:50,068 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 23:37:50,176 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 22 [2024-11-13 23:37:50,286 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-11-13 23:37:50,286 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 23:37:50,391 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 26 [2024-11-13 23:37:50,508 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-11-13 23:37:50,508 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2029250913] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 23:37:50,508 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1362961667] [2024-11-13 23:37:50,510 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2024-11-13 23:37:50,510 INFO L166 IcfgInterpreter]: Building call graph [2024-11-13 23:37:50,510 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-13 23:37:50,510 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-13 23:37:50,511 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-13 23:37:50,865 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-13 23:37:51,113 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '405#(and (<= 1 |ULTIMATE.start_main_~pos~0#1|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#vectorx~0#1.base|) |ULTIMATE.start_main_~#vectorx~0#1.offset|) |ULTIMATE.start_main_~element~0#1|) (= |ULTIMATE.start_main_~x~0#1| 0))' at error location [2024-11-13 23:37:51,114 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-13 23:37:51,114 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 23:37:51,114 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 14 [2024-11-13 23:37:51,114 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [928539596] [2024-11-13 23:37:51,114 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 23:37:51,115 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-11-13 23:37:51,115 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-13 23:37:51,115 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-11-13 23:37:51,116 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=373, Unknown=0, NotChecked=0, Total=462 [2024-11-13 23:37:51,116 INFO L87 Difference]: Start difference. First operand 16 states and 19 transitions. Second operand has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 14 states have internal predecessors, (28), 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 23:37:51,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 23:37:51,781 INFO L93 Difference]: Finished difference Result 45 states and 67 transitions. [2024-11-13 23:37:51,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2024-11-13 23:37:51,782 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2024-11-13 23:37:51,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 23:37:51,784 INFO L225 Difference]: With dead ends: 45 [2024-11-13 23:37:51,784 INFO L226 Difference]: Without dead ends: 35 [2024-11-13 23:37:51,785 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 363 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=331, Invalid=1075, Unknown=0, NotChecked=0, Total=1406 [2024-11-13 23:37:51,786 INFO L432 NwaCegarLoop]: 6 mSDtfsCounter, 14 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 81 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 107 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 81 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-13 23:37:51,787 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 45 Invalid, 107 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 81 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-13 23:37:51,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2024-11-13 23:37:51,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 32. [2024-11-13 23:37:51,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 31 states have (on average 1.3225806451612903) internal successors, (41), 31 states have internal predecessors, (41), 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 23:37:51,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 41 transitions. [2024-11-13 23:37:51,797 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 41 transitions. Word has length 14 [2024-11-13 23:37:51,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 23:37:51,797 INFO L471 AbstractCegarLoop]: Abstraction has 32 states and 41 transitions. [2024-11-13 23:37:51,797 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 14 states have internal predecessors, (28), 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 23:37:51,797 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 41 transitions. [2024-11-13 23:37:51,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2024-11-13 23:37:51,798 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 23:37:51,798 INFO L215 NwaCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 23:37:51,822 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c994953f-a21f-411e-8c2a-d10bed0103b6/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-11-13 23:37:52,002 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c994953f-a21f-411e-8c2a-d10bed0103b6/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 23:37:52,003 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 23:37:52,003 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 23:37:52,003 INFO L85 PathProgramCache]: Analyzing trace with hash -1013440046, now seen corresponding path program 1 times [2024-11-13 23:37:52,003 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-13 23:37:52,003 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1504381388] [2024-11-13 23:37:52,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 23:37:52,004 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 23:37:52,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 23:37:52,335 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-13 23:37:52,335 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-13 23:37:52,336 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1504381388] [2024-11-13 23:37:52,336 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1504381388] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 23:37:52,336 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [127381085] [2024-11-13 23:37:52,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 23:37:52,336 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 23:37:52,336 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c994953f-a21f-411e-8c2a-d10bed0103b6/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-13 23:37:52,339 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c994953f-a21f-411e-8c2a-d10bed0103b6/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 23:37:52,341 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c994953f-a21f-411e-8c2a-d10bed0103b6/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-13 23:37:52,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 23:37:52,440 INFO L255 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-11-13 23:37:52,442 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 23:37:52,598 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-13 23:37:52,598 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 23:37:52,789 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-13 23:37:52,790 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [127381085] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 23:37:52,790 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [590473799] [2024-11-13 23:37:52,792 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2024-11-13 23:37:52,792 INFO L166 IcfgInterpreter]: Building call graph [2024-11-13 23:37:52,793 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-13 23:37:52,793 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-13 23:37:52,793 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-13 23:37:53,101 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-13 23:37:53,294 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '699#(and (<= 1 |ULTIMATE.start_main_~pos~0#1|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#vectorx~0#1.base|) |ULTIMATE.start_main_~#vectorx~0#1.offset|) |ULTIMATE.start_main_~element~0#1|) (= |ULTIMATE.start_main_~x~0#1| 0))' at error location [2024-11-13 23:37:53,294 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-13 23:37:53,294 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 23:37:53,294 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 22 [2024-11-13 23:37:53,295 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1095890740] [2024-11-13 23:37:53,295 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 23:37:53,295 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-11-13 23:37:53,295 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-13 23:37:53,296 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-11-13 23:37:53,296 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=252, Invalid=504, Unknown=0, NotChecked=0, Total=756 [2024-11-13 23:37:53,297 INFO L87 Difference]: Start difference. First operand 32 states and 41 transitions. Second operand has 23 states, 23 states have (on average 1.434782608695652) internal successors, (33), 22 states have internal predecessors, (33), 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 23:37:53,395 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 23:37:53,396 INFO L93 Difference]: Finished difference Result 66 states and 92 transitions. [2024-11-13 23:37:53,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-11-13 23:37:53,398 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.434782608695652) internal successors, (33), 22 states have internal predecessors, (33), 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 18 [2024-11-13 23:37:53,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 23:37:53,400 INFO L225 Difference]: With dead ends: 66 [2024-11-13 23:37:53,400 INFO L226 Difference]: Without dead ends: 42 [2024-11-13 23:37:53,401 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 339 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=252, Invalid=504, Unknown=0, NotChecked=0, Total=756 [2024-11-13 23:37:53,401 INFO L432 NwaCegarLoop]: 8 mSDtfsCounter, 0 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-13 23:37:53,402 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 32 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-13 23:37:53,405 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2024-11-13 23:37:53,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 40. [2024-11-13 23:37:53,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 39 states have (on average 1.2564102564102564) internal successors, (49), 39 states have internal predecessors, (49), 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 23:37:53,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 49 transitions. [2024-11-13 23:37:53,421 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 49 transitions. Word has length 18 [2024-11-13 23:37:53,421 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 23:37:53,422 INFO L471 AbstractCegarLoop]: Abstraction has 40 states and 49 transitions. [2024-11-13 23:37:53,422 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.434782608695652) internal successors, (33), 22 states have internal predecessors, (33), 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 23:37:53,423 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 49 transitions. [2024-11-13 23:37:53,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2024-11-13 23:37:53,424 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 23:37:53,424 INFO L215 NwaCegarLoop]: trace histogram [14, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 23:37:53,451 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c994953f-a21f-411e-8c2a-d10bed0103b6/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-11-13 23:37:53,625 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c994953f-a21f-411e-8c2a-d10bed0103b6/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2024-11-13 23:37:53,625 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 23:37:53,626 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 23:37:53,626 INFO L85 PathProgramCache]: Analyzing trace with hash 1999302354, now seen corresponding path program 2 times [2024-11-13 23:37:53,626 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-13 23:37:53,626 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [878537232] [2024-11-13 23:37:53,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 23:37:53,626 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 23:37:53,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 23:37:54,258 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-13 23:37:54,259 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-13 23:37:54,259 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [878537232] [2024-11-13 23:37:54,259 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [878537232] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 23:37:54,259 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [332739027] [2024-11-13 23:37:54,260 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-13 23:37:54,260 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 23:37:54,260 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c994953f-a21f-411e-8c2a-d10bed0103b6/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-13 23:37:54,263 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c994953f-a21f-411e-8c2a-d10bed0103b6/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 23:37:54,270 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c994953f-a21f-411e-8c2a-d10bed0103b6/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-13 23:37:54,370 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-13 23:37:54,370 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-13 23:37:54,371 INFO L255 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-11-13 23:37:54,374 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 23:37:54,492 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 22 [2024-11-13 23:37:54,604 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2024-11-13 23:37:54,605 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 23:37:54,819 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2024-11-13 23:37:54,819 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [332739027] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 23:37:54,820 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [166231553] [2024-11-13 23:37:54,822 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2024-11-13 23:37:54,822 INFO L166 IcfgInterpreter]: Building call graph [2024-11-13 23:37:54,823 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-13 23:37:54,823 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-13 23:37:54,823 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-13 23:37:55,151 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-13 23:37:55,688 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1067#(and (= |ULTIMATE.start_main_~#vectorx~0#1.offset| 0) (<= 1 |ULTIMATE.start_main_~pos~0#1|) (exists ((|v_ULTIMATE.start_main_~i~0#1_125| Int) (|v_ULTIMATE.start_main_~found~0#1_46| Int)) (and (<= 1 |#StackHeapBarrier|) (<= |v_ULTIMATE.start_main_~found~0#1_46| 1) (<= 0 |v_ULTIMATE.start_main_~found~0#1_46|) (<= |ULTIMATE.start_main_~element~0#1| 2147483647) (<= 0 (+ 2147483648 |ULTIMATE.start_main_~element~0#1|)) (not (= |v_ULTIMATE.start_main_~found~0#1_46| 0)) (<= 99999 |v_ULTIMATE.start_main_~i~0#1_125|) (<= 2 |ULTIMATE.start_main_~#vectorx~0#1.base|))) (= |ULTIMATE.start_main_~x~0#1| 0) (= (select (select |#memory_int| |ULTIMATE.start_main_~#vectorx~0#1.base|) 0) |ULTIMATE.start_main_~element~0#1|))' at error location [2024-11-13 23:37:55,688 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-13 23:37:55,688 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 23:37:55,688 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 6, 6] total 26 [2024-11-13 23:37:55,688 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2128766303] [2024-11-13 23:37:55,688 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 23:37:55,689 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2024-11-13 23:37:55,689 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-13 23:37:55,689 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2024-11-13 23:37:55,690 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=311, Invalid=879, Unknown=0, NotChecked=0, Total=1190 [2024-11-13 23:37:55,691 INFO L87 Difference]: Start difference. First operand 40 states and 49 transitions. Second operand has 27 states, 27 states have (on average 1.5925925925925926) internal successors, (43), 26 states have internal predecessors, (43), 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 23:37:57,298 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 23:37:57,299 INFO L93 Difference]: Finished difference Result 103 states and 155 transitions. [2024-11-13 23:37:57,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2024-11-13 23:37:57,299 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.5925925925925926) internal successors, (43), 26 states have internal predecessors, (43), 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 26 [2024-11-13 23:37:57,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 23:37:57,301 INFO L225 Difference]: With dead ends: 103 [2024-11-13 23:37:57,301 INFO L226 Difference]: Without dead ends: 79 [2024-11-13 23:37:57,303 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 1181 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=1254, Invalid=3438, Unknown=0, NotChecked=0, Total=4692 [2024-11-13 23:37:57,304 INFO L432 NwaCegarLoop]: 6 mSDtfsCounter, 108 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 109 mSolverCounterSat, 78 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 108 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 187 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 78 IncrementalHoareTripleChecker+Valid, 109 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-13 23:37:57,305 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [108 Valid, 52 Invalid, 187 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [78 Valid, 109 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-13 23:37:57,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2024-11-13 23:37:57,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 66. [2024-11-13 23:37:57,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 65 states have (on average 1.323076923076923) internal successors, (86), 65 states have internal predecessors, (86), 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 23:37:57,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 86 transitions. [2024-11-13 23:37:57,321 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 86 transitions. Word has length 26 [2024-11-13 23:37:57,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 23:37:57,321 INFO L471 AbstractCegarLoop]: Abstraction has 66 states and 86 transitions. [2024-11-13 23:37:57,322 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.5925925925925926) internal successors, (43), 26 states have internal predecessors, (43), 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 23:37:57,322 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 86 transitions. [2024-11-13 23:37:57,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2024-11-13 23:37:57,323 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 23:37:57,323 INFO L215 NwaCegarLoop]: trace histogram [18, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 23:37:57,345 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c994953f-a21f-411e-8c2a-d10bed0103b6/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-11-13 23:37:57,523 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c994953f-a21f-411e-8c2a-d10bed0103b6/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2024-11-13 23:37:57,524 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 23:37:57,524 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 23:37:57,524 INFO L85 PathProgramCache]: Analyzing trace with hash -832909367, now seen corresponding path program 3 times [2024-11-13 23:37:57,524 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-13 23:37:57,524 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [277477822] [2024-11-13 23:37:57,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 23:37:57,525 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 23:37:57,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 23:37:58,166 INFO L134 CoverageAnalysis]: Checked inductivity of 180 backedges. 0 proven. 171 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-13 23:37:58,166 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-13 23:37:58,166 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [277477822] [2024-11-13 23:37:58,167 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [277477822] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 23:37:58,167 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [266443799] [2024-11-13 23:37:58,167 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-13 23:37:58,167 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 23:37:58,167 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c994953f-a21f-411e-8c2a-d10bed0103b6/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-13 23:37:58,169 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c994953f-a21f-411e-8c2a-d10bed0103b6/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 23:37:58,172 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c994953f-a21f-411e-8c2a-d10bed0103b6/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-13 23:37:58,252 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-13 23:37:58,253 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-13 23:37:58,254 INFO L255 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 24 conjuncts are in the unsatisfiable core [2024-11-13 23:37:58,259 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 23:37:58,572 INFO L349 Elim1Store]: treesize reduction 56, result has 29.1 percent of original size [2024-11-13 23:37:58,573 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 43 treesize of output 30 [2024-11-13 23:37:58,637 INFO L349 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2024-11-13 23:37:58,638 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 12 [2024-11-13 23:37:58,722 INFO L134 CoverageAnalysis]: Checked inductivity of 180 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 171 trivial. 0 not checked. [2024-11-13 23:37:58,723 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 23:37:59,381 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 42 [2024-11-13 23:37:59,442 INFO L349 Elim1Store]: treesize reduction 13, result has 48.0 percent of original size [2024-11-13 23:37:59,442 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 170 treesize of output 117 [2024-11-13 23:37:59,474 INFO L134 CoverageAnalysis]: Checked inductivity of 180 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 171 trivial. 0 not checked. [2024-11-13 23:37:59,475 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [266443799] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 23:37:59,475 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [621245788] [2024-11-13 23:37:59,477 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2024-11-13 23:37:59,477 INFO L166 IcfgInterpreter]: Building call graph [2024-11-13 23:37:59,477 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-13 23:37:59,477 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-13 23:37:59,477 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-13 23:37:59,702 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-13 23:37:59,937 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1675#(and (<= 1 |ULTIMATE.start_main_~pos~0#1|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#vectorx~0#1.base|) |ULTIMATE.start_main_~#vectorx~0#1.offset|) |ULTIMATE.start_main_~element~0#1|) (= |ULTIMATE.start_main_~x~0#1| 0))' at error location [2024-11-13 23:37:59,937 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-13 23:37:59,937 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 23:37:59,937 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 11, 11] total 36 [2024-11-13 23:37:59,937 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1475478613] [2024-11-13 23:37:59,937 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 23:37:59,938 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2024-11-13 23:37:59,938 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-13 23:37:59,939 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2024-11-13 23:37:59,940 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=294, Invalid=1346, Unknown=0, NotChecked=0, Total=1640 [2024-11-13 23:37:59,940 INFO L87 Difference]: Start difference. First operand 66 states and 86 transitions. Second operand has 36 states, 36 states have (on average 1.4444444444444444) internal successors, (52), 36 states have internal predecessors, (52), 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 23:38:01,537 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2024-11-13 23:38:02,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 23:38:02,185 INFO L93 Difference]: Finished difference Result 144 states and 187 transitions. [2024-11-13 23:38:02,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2024-11-13 23:38:02,186 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 1.4444444444444444) internal successors, (52), 36 states have internal predecessors, (52), 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 32 [2024-11-13 23:38:02,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 23:38:02,187 INFO L225 Difference]: With dead ends: 144 [2024-11-13 23:38:02,187 INFO L226 Difference]: Without dead ends: 98 [2024-11-13 23:38:02,189 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 73 SyntacticMatches, 2 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 592 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=413, Invalid=2037, Unknown=0, NotChecked=0, Total=2450 [2024-11-13 23:38:02,190 INFO L432 NwaCegarLoop]: 3 mSDtfsCounter, 22 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 339 mSolverCounterSat, 8 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 348 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 339 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2024-11-13 23:38:02,190 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 43 Invalid, 348 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 339 Invalid, 1 Unknown, 0 Unchecked, 1.5s Time] [2024-11-13 23:38:02,191 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2024-11-13 23:38:02,226 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 89. [2024-11-13 23:38:02,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 88 states have (on average 1.25) internal successors, (110), 88 states have internal predecessors, (110), 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 23:38:02,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 110 transitions. [2024-11-13 23:38:02,228 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 110 transitions. Word has length 32 [2024-11-13 23:38:02,228 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 23:38:02,228 INFO L471 AbstractCegarLoop]: Abstraction has 89 states and 110 transitions. [2024-11-13 23:38:02,228 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 1.4444444444444444) internal successors, (52), 36 states have internal predecessors, (52), 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 23:38:02,228 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 110 transitions. [2024-11-13 23:38:02,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2024-11-13 23:38:02,229 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 23:38:02,229 INFO L215 NwaCegarLoop]: trace histogram [19, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 23:38:02,255 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c994953f-a21f-411e-8c2a-d10bed0103b6/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-11-13 23:38:02,434 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c994953f-a21f-411e-8c2a-d10bed0103b6/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2024-11-13 23:38:02,435 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 23:38:02,435 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 23:38:02,435 INFO L85 PathProgramCache]: Analyzing trace with hash -1237514245, now seen corresponding path program 1 times [2024-11-13 23:38:02,435 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-13 23:38:02,435 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1260832940] [2024-11-13 23:38:02,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 23:38:02,435 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 23:38:02,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 23:38:03,315 INFO L134 CoverageAnalysis]: Checked inductivity of 201 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2024-11-13 23:38:03,315 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-13 23:38:03,315 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1260832940] [2024-11-13 23:38:03,315 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1260832940] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 23:38:03,315 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1197180655] [2024-11-13 23:38:03,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 23:38:03,316 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 23:38:03,316 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c994953f-a21f-411e-8c2a-d10bed0103b6/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-13 23:38:03,318 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c994953f-a21f-411e-8c2a-d10bed0103b6/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 23:38:03,320 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c994953f-a21f-411e-8c2a-d10bed0103b6/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-13 23:38:03,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 23:38:03,466 INFO L255 TraceCheckSpWp]: Trace formula consists of 275 conjuncts, 22 conjuncts are in the unsatisfiable core [2024-11-13 23:38:03,469 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 23:38:03,917 INFO L134 CoverageAnalysis]: Checked inductivity of 201 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2024-11-13 23:38:03,917 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 23:38:04,648 INFO L134 CoverageAnalysis]: Checked inductivity of 201 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2024-11-13 23:38:04,648 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1197180655] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 23:38:04,648 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2053272235] [2024-11-13 23:38:04,650 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2024-11-13 23:38:04,650 INFO L166 IcfgInterpreter]: Building call graph [2024-11-13 23:38:04,650 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-13 23:38:04,651 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-13 23:38:04,651 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-13 23:38:05,031 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-13 23:38:05,472 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2398#(and (= |ULTIMATE.start_main_~#vectorx~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~x~0#1|) (<= (+ |ULTIMATE.start_main_~x~0#1| 1) |ULTIMATE.start_main_~pos~0#1|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#vectorx~0#1.base|) (* |ULTIMATE.start_main_~x~0#1| 4)) |ULTIMATE.start_main_~element~0#1|))' at error location [2024-11-13 23:38:05,472 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-13 23:38:05,472 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 23:38:05,472 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21, 21] total 61 [2024-11-13 23:38:05,472 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [5376004] [2024-11-13 23:38:05,473 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 23:38:05,473 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 62 states [2024-11-13 23:38:05,473 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-13 23:38:05,475 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2024-11-13 23:38:05,477 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1752, Invalid=3218, Unknown=0, NotChecked=0, Total=4970 [2024-11-13 23:38:05,478 INFO L87 Difference]: Start difference. First operand 89 states and 110 transitions. Second operand has 62 states, 62 states have (on average 1.1935483870967742) internal successors, (74), 61 states have internal predecessors, (74), 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 23:38:05,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 23:38:05,646 INFO L93 Difference]: Finished difference Result 180 states and 243 transitions. [2024-11-13 23:38:05,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2024-11-13 23:38:05,647 INFO L78 Accepts]: Start accepts. Automaton has has 62 states, 62 states have (on average 1.1935483870967742) internal successors, (74), 61 states have internal predecessors, (74), 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 36 [2024-11-13 23:38:05,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 23:38:05,649 INFO L225 Difference]: With dead ends: 180 [2024-11-13 23:38:05,649 INFO L226 Difference]: Without dead ends: 112 [2024-11-13 23:38:05,650 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 2439 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=1752, Invalid=3218, Unknown=0, NotChecked=0, Total=4970 [2024-11-13 23:38:05,651 INFO L432 NwaCegarLoop]: 8 mSDtfsCounter, 0 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 97 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 99 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 97 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-13 23:38:05,652 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 44 Invalid, 99 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 97 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-13 23:38:05,653 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2024-11-13 23:38:05,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 110. [2024-11-13 23:38:05,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 109 states have (on average 1.201834862385321) internal successors, (131), 109 states have internal predecessors, (131), 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 23:38:05,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 131 transitions. [2024-11-13 23:38:05,693 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 131 transitions. Word has length 36 [2024-11-13 23:38:05,693 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 23:38:05,693 INFO L471 AbstractCegarLoop]: Abstraction has 110 states and 131 transitions. [2024-11-13 23:38:05,694 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 62 states, 62 states have (on average 1.1935483870967742) internal successors, (74), 61 states have internal predecessors, (74), 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 23:38:05,694 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 131 transitions. [2024-11-13 23:38:05,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2024-11-13 23:38:05,695 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 23:38:05,695 INFO L215 NwaCegarLoop]: trace histogram [40, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 23:38:05,721 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c994953f-a21f-411e-8c2a-d10bed0103b6/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-11-13 23:38:05,899 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c994953f-a21f-411e-8c2a-d10bed0103b6/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 23:38:05,900 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 23:38:05,900 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 23:38:05,901 INFO L85 PathProgramCache]: Analyzing trace with hash -1815551915, now seen corresponding path program 2 times [2024-11-13 23:38:05,901 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-13 23:38:05,901 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1542397914] [2024-11-13 23:38:05,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 23:38:05,901 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 23:38:05,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 23:38:08,199 INFO L134 CoverageAnalysis]: Checked inductivity of 831 backedges. 0 proven. 820 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2024-11-13 23:38:08,199 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-13 23:38:08,199 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1542397914] [2024-11-13 23:38:08,199 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1542397914] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 23:38:08,199 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1107531380] [2024-11-13 23:38:08,199 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-13 23:38:08,199 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 23:38:08,200 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c994953f-a21f-411e-8c2a-d10bed0103b6/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-13 23:38:08,201 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c994953f-a21f-411e-8c2a-d10bed0103b6/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 23:38:08,203 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c994953f-a21f-411e-8c2a-d10bed0103b6/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-13 23:38:08,348 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-11-13 23:38:08,348 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-13 23:38:08,349 INFO L255 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-11-13 23:38:08,352 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 23:38:08,507 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 22 [2024-11-13 23:38:08,722 INFO L134 CoverageAnalysis]: Checked inductivity of 831 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 822 trivial. 0 not checked. [2024-11-13 23:38:08,723 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 23:38:09,250 INFO L134 CoverageAnalysis]: Checked inductivity of 831 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 822 trivial. 0 not checked. [2024-11-13 23:38:09,251 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1107531380] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 23:38:09,251 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2044712503] [2024-11-13 23:38:09,252 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2024-11-13 23:38:09,253 INFO L166 IcfgInterpreter]: Building call graph [2024-11-13 23:38:09,253 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-13 23:38:09,253 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-13 23:38:09,253 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-13 23:38:09,488 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-13 23:38:09,808 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3348#(and (<= 0 |ULTIMATE.start_main_~x~0#1|) (<= (+ |ULTIMATE.start_main_~x~0#1| 1) |ULTIMATE.start_main_~pos~0#1|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#vectorx~0#1.base|) (+ (* |ULTIMATE.start_main_~x~0#1| 4) |ULTIMATE.start_main_~#vectorx~0#1.offset|)) |ULTIMATE.start_main_~element~0#1|))' at error location [2024-11-13 23:38:09,808 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-13 23:38:09,808 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 23:38:09,808 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 10, 10] total 59 [2024-11-13 23:38:09,808 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1560964436] [2024-11-13 23:38:09,808 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 23:38:09,809 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 60 states [2024-11-13 23:38:09,809 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-13 23:38:09,810 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2024-11-13 23:38:09,811 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1403, Invalid=2887, Unknown=0, NotChecked=0, Total=4290 [2024-11-13 23:38:09,811 INFO L87 Difference]: Start difference. First operand 110 states and 131 transitions. Second operand has 60 states, 60 states have (on average 1.2666666666666666) internal successors, (76), 59 states have internal predecessors, (76), 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 23:38:18,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 23:38:18,455 INFO L93 Difference]: Finished difference Result 291 states and 437 transitions. [2024-11-13 23:38:18,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 138 states. [2024-11-13 23:38:18,455 INFO L78 Accepts]: Start accepts. Automaton has has 60 states, 60 states have (on average 1.2666666666666666) internal successors, (76), 59 states have internal predecessors, (76), 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 57 [2024-11-13 23:38:18,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 23:38:18,457 INFO L225 Difference]: With dead ends: 291 [2024-11-13 23:38:18,457 INFO L226 Difference]: Without dead ends: 221 [2024-11-13 23:38:18,465 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 344 GetRequests, 146 SyntacticMatches, 1 SemanticMatches, 197 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11267 ImplicationChecksByTransitivity, 10.0s TimeCoverageRelationStatistics Valid=11661, Invalid=27741, Unknown=0, NotChecked=0, Total=39402 [2024-11-13 23:38:18,465 INFO L432 NwaCegarLoop]: 6 mSDtfsCounter, 341 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 222 mSolverCounterSat, 370 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 341 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 592 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 370 IncrementalHoareTripleChecker+Valid, 222 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-11-13 23:38:18,466 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [341 Valid, 32 Invalid, 592 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [370 Valid, 222 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-11-13 23:38:18,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 221 states. [2024-11-13 23:38:18,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 221 to 195. [2024-11-13 23:38:18,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 195 states, 194 states have (on average 1.2525773195876289) internal successors, (243), 194 states have internal predecessors, (243), 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 23:38:18,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 243 transitions. [2024-11-13 23:38:18,566 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 243 transitions. Word has length 57 [2024-11-13 23:38:18,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 23:38:18,567 INFO L471 AbstractCegarLoop]: Abstraction has 195 states and 243 transitions. [2024-11-13 23:38:18,567 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 60 states, 60 states have (on average 1.2666666666666666) internal successors, (76), 59 states have internal predecessors, (76), 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 23:38:18,567 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 243 transitions. [2024-11-13 23:38:18,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2024-11-13 23:38:18,569 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 23:38:18,569 INFO L215 NwaCegarLoop]: trace histogram [44, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 23:38:18,589 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c994953f-a21f-411e-8c2a-d10bed0103b6/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-11-13 23:38:18,769 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c994953f-a21f-411e-8c2a-d10bed0103b6/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 23:38:18,769 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 23:38:18,770 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 23:38:18,770 INFO L85 PathProgramCache]: Analyzing trace with hash -700948788, now seen corresponding path program 3 times [2024-11-13 23:38:18,770 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-13 23:38:18,770 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [471936254] [2024-11-13 23:38:18,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 23:38:18,770 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 23:38:18,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 23:38:21,301 INFO L134 CoverageAnalysis]: Checked inductivity of 1008 backedges. 0 proven. 990 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2024-11-13 23:38:21,302 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-13 23:38:21,302 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [471936254] [2024-11-13 23:38:21,302 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [471936254] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 23:38:21,302 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [833704482] [2024-11-13 23:38:21,303 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-13 23:38:21,303 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 23:38:21,303 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c994953f-a21f-411e-8c2a-d10bed0103b6/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-13 23:38:21,305 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c994953f-a21f-411e-8c2a-d10bed0103b6/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 23:38:21,308 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c994953f-a21f-411e-8c2a-d10bed0103b6/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-13 23:38:21,448 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-13 23:38:21,448 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-13 23:38:21,450 INFO L255 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 33 conjuncts are in the unsatisfiable core [2024-11-13 23:38:21,453 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 23:38:21,842 INFO L349 Elim1Store]: treesize reduction 58, result has 30.1 percent of original size [2024-11-13 23:38:21,843 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 45 treesize of output 32 [2024-11-13 23:38:21,906 INFO L349 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2024-11-13 23:38:21,907 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 14 [2024-11-13 23:38:21,976 INFO L349 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2024-11-13 23:38:21,976 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 14 [2024-11-13 23:38:22,169 INFO L134 CoverageAnalysis]: Checked inductivity of 1008 backedges. 1 proven. 17 refuted. 0 times theorem prover too weak. 990 trivial. 0 not checked. [2024-11-13 23:38:22,169 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 23:38:32,111 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 51 [2024-11-13 23:38:32,137 INFO L349 Elim1Store]: treesize reduction 13, result has 48.0 percent of original size [2024-11-13 23:38:32,137 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 334 treesize of output 229 [2024-11-13 23:38:32,204 INFO L134 CoverageAnalysis]: Checked inductivity of 1008 backedges. 1 proven. 17 refuted. 0 times theorem prover too weak. 990 trivial. 0 not checked. [2024-11-13 23:38:32,204 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [833704482] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 23:38:32,204 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1841856297] [2024-11-13 23:38:32,206 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2024-11-13 23:38:32,206 INFO L166 IcfgInterpreter]: Building call graph [2024-11-13 23:38:32,206 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-13 23:38:32,207 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-13 23:38:32,207 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-13 23:38:32,551 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-13 23:38:33,333 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '4992#(and (= |ULTIMATE.start_main_~#vectorx~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~x~0#1|) (<= (+ |ULTIMATE.start_main_~x~0#1| 1) |ULTIMATE.start_main_~pos~0#1|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#vectorx~0#1.base|) (* |ULTIMATE.start_main_~x~0#1| 4)) |ULTIMATE.start_main_~element~0#1|))' at error location [2024-11-13 23:38:33,333 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-13 23:38:33,333 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 23:38:33,333 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 14, 14] total 67 [2024-11-13 23:38:33,333 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2059395365] [2024-11-13 23:38:33,333 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 23:38:33,334 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 67 states [2024-11-13 23:38:33,334 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-13 23:38:33,335 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2024-11-13 23:38:33,335 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1198, Invalid=4498, Unknown=4, NotChecked=0, Total=5700 [2024-11-13 23:38:33,336 INFO L87 Difference]: Start difference. First operand 195 states and 243 transitions. Second operand has 67 states, 67 states have (on average 1.328358208955224) internal successors, (89), 67 states have internal predecessors, (89), 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 23:38:35,420 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-13 23:38:40,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 23:38:40,775 INFO L93 Difference]: Finished difference Result 408 states and 508 transitions. [2024-11-13 23:38:40,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2024-11-13 23:38:40,776 INFO L78 Accepts]: Start accepts. Automaton has has 67 states, 67 states have (on average 1.328358208955224) internal successors, (89), 67 states have internal predecessors, (89), 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 63 [2024-11-13 23:38:40,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 23:38:40,778 INFO L225 Difference]: With dead ends: 408 [2024-11-13 23:38:40,778 INFO L226 Difference]: Without dead ends: 259 [2024-11-13 23:38:40,780 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 246 GetRequests, 158 SyntacticMatches, 1 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 1765 ImplicationChecksByTransitivity, 16.5s TimeCoverageRelationStatistics Valid=1424, Invalid=6403, Unknown=5, NotChecked=0, Total=7832 [2024-11-13 23:38:40,780 INFO L432 NwaCegarLoop]: 4 mSDtfsCounter, 28 mSDsluCounter, 61 mSDsCounter, 0 mSdLazyCounter, 577 mSolverCounterSat, 14 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 65 SdHoareTripleChecker+Invalid, 592 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 577 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.2s IncrementalHoareTripleChecker+Time [2024-11-13 23:38:40,781 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 65 Invalid, 592 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 577 Invalid, 1 Unknown, 0 Unchecked, 3.2s Time] [2024-11-13 23:38:40,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 259 states. [2024-11-13 23:38:40,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 259 to 246. [2024-11-13 23:38:40,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 246 states, 245 states have (on average 1.2040816326530612) internal successors, (295), 245 states have internal predecessors, (295), 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 23:38:40,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 246 states to 246 states and 295 transitions. [2024-11-13 23:38:40,878 INFO L78 Accepts]: Start accepts. Automaton has 246 states and 295 transitions. Word has length 63 [2024-11-13 23:38:40,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 23:38:40,879 INFO L471 AbstractCegarLoop]: Abstraction has 246 states and 295 transitions. [2024-11-13 23:38:40,879 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 67 states, 67 states have (on average 1.328358208955224) internal successors, (89), 67 states have internal predecessors, (89), 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 23:38:40,879 INFO L276 IsEmpty]: Start isEmpty. Operand 246 states and 295 transitions. [2024-11-13 23:38:40,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2024-11-13 23:38:40,881 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 23:38:40,881 INFO L215 NwaCegarLoop]: trace histogram [45, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 23:38:40,907 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c994953f-a21f-411e-8c2a-d10bed0103b6/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2024-11-13 23:38:41,081 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c994953f-a21f-411e-8c2a-d10bed0103b6/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 23:38:41,081 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 23:38:41,082 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 23:38:41,082 INFO L85 PathProgramCache]: Analyzing trace with hash -1023209076, now seen corresponding path program 4 times [2024-11-13 23:38:41,082 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-13 23:38:41,082 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [71293775] [2024-11-13 23:38:41,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 23:38:41,082 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 23:38:41,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 23:38:43,862 INFO L134 CoverageAnalysis]: Checked inductivity of 1058 backedges. 0 proven. 1035 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2024-11-13 23:38:43,862 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-13 23:38:43,862 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [71293775] [2024-11-13 23:38:43,862 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [71293775] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 23:38:43,862 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [768245869] [2024-11-13 23:38:43,862 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-13 23:38:43,862 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 23:38:43,862 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c994953f-a21f-411e-8c2a-d10bed0103b6/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-13 23:38:43,864 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c994953f-a21f-411e-8c2a-d10bed0103b6/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 23:38:43,865 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c994953f-a21f-411e-8c2a-d10bed0103b6/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-11-13 23:38:44,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 23:38:44,105 INFO L255 TraceCheckSpWp]: Trace formula consists of 532 conjuncts, 48 conjuncts are in the unsatisfiable core [2024-11-13 23:38:44,108 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 23:38:45,688 INFO L134 CoverageAnalysis]: Checked inductivity of 1058 backedges. 0 proven. 1035 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2024-11-13 23:38:45,688 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 23:38:50,007 INFO L134 CoverageAnalysis]: Checked inductivity of 1058 backedges. 0 proven. 1035 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2024-11-13 23:38:50,007 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [768245869] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 23:38:50,008 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [398202266] [2024-11-13 23:38:50,009 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2024-11-13 23:38:50,009 INFO L166 IcfgInterpreter]: Building call graph [2024-11-13 23:38:50,010 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-13 23:38:50,010 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-13 23:38:50,010 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-13 23:38:50,198 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-13 23:38:50,574 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '6821#(and (<= 0 |ULTIMATE.start_main_~x~0#1|) (<= (+ |ULTIMATE.start_main_~x~0#1| 1) |ULTIMATE.start_main_~pos~0#1|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#vectorx~0#1.base|) (+ (* |ULTIMATE.start_main_~x~0#1| 4) |ULTIMATE.start_main_~#vectorx~0#1.offset|)) |ULTIMATE.start_main_~element~0#1|))' at error location [2024-11-13 23:38:50,574 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-13 23:38:50,574 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 23:38:50,574 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 47, 47] total 139 [2024-11-13 23:38:50,574 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1910513126] [2024-11-13 23:38:50,574 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 23:38:50,575 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 140 states [2024-11-13 23:38:50,575 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-13 23:38:50,578 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 140 interpolants. [2024-11-13 23:38:50,580 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8757, Invalid=12413, Unknown=0, NotChecked=0, Total=21170 [2024-11-13 23:38:50,580 INFO L87 Difference]: Start difference. First operand 246 states and 295 transitions. Second operand has 140 states, 140 states have (on average 1.0857142857142856) internal successors, (152), 139 states have internal predecessors, (152), 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 23:38:50,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 23:38:50,949 INFO L93 Difference]: Finished difference Result 494 states and 639 transitions. [2024-11-13 23:38:50,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2024-11-13 23:38:50,950 INFO L78 Accepts]: Start accepts. Automaton has has 140 states, 140 states have (on average 1.0857142857142856) internal successors, (152), 139 states have internal predecessors, (152), 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 67 [2024-11-13 23:38:50,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 23:38:50,952 INFO L225 Difference]: With dead ends: 494 [2024-11-13 23:38:50,952 INFO L226 Difference]: Without dead ends: 295 [2024-11-13 23:38:50,954 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 246 GetRequests, 101 SyntacticMatches, 1 SemanticMatches, 144 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9695 ImplicationChecksByTransitivity, 7.6s TimeCoverageRelationStatistics Valid=8757, Invalid=12413, Unknown=0, NotChecked=0, Total=21170 [2024-11-13 23:38:50,955 INFO L432 NwaCegarLoop]: 8 mSDtfsCounter, 0 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 141 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 20 SdHoareTripleChecker+Invalid, 143 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 141 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-13 23:38:50,955 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 20 Invalid, 143 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 141 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-13 23:38:50,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 295 states. [2024-11-13 23:38:51,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 295 to 293. [2024-11-13 23:38:51,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 293 states, 292 states have (on average 1.1712328767123288) internal successors, (342), 292 states have internal predecessors, (342), 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 23:38:51,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 293 states to 293 states and 342 transitions. [2024-11-13 23:38:51,098 INFO L78 Accepts]: Start accepts. Automaton has 293 states and 342 transitions. Word has length 67 [2024-11-13 23:38:51,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 23:38:51,098 INFO L471 AbstractCegarLoop]: Abstraction has 293 states and 342 transitions. [2024-11-13 23:38:51,098 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 140 states, 140 states have (on average 1.0857142857142856) internal successors, (152), 139 states have internal predecessors, (152), 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 23:38:51,098 INFO L276 IsEmpty]: Start isEmpty. Operand 293 states and 342 transitions. [2024-11-13 23:38:51,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2024-11-13 23:38:51,100 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 23:38:51,100 INFO L215 NwaCegarLoop]: trace histogram [92, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 23:38:51,119 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c994953f-a21f-411e-8c2a-d10bed0103b6/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2024-11-13 23:38:51,300 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c994953f-a21f-411e-8c2a-d10bed0103b6/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 23:38:51,300 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 23:38:51,301 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 23:38:51,301 INFO L85 PathProgramCache]: Analyzing trace with hash -1026355150, now seen corresponding path program 5 times [2024-11-13 23:38:51,301 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-13 23:38:51,301 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [983772808] [2024-11-13 23:38:51,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 23:38:51,301 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 23:38:51,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 23:39:00,152 INFO L134 CoverageAnalysis]: Checked inductivity of 4301 backedges. 0 proven. 4278 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2024-11-13 23:39:00,152 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-13 23:39:00,152 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [983772808] [2024-11-13 23:39:00,153 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [983772808] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 23:39:00,153 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [760112528] [2024-11-13 23:39:00,153 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-13 23:39:00,153 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 23:39:00,153 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c994953f-a21f-411e-8c2a-d10bed0103b6/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-13 23:39:00,155 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c994953f-a21f-411e-8c2a-d10bed0103b6/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 23:39:00,157 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c994953f-a21f-411e-8c2a-d10bed0103b6/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-11-13 23:39:00,418 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-11-13 23:39:00,418 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-13 23:39:00,420 INFO L255 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-11-13 23:39:00,423 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 23:39:00,721 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 22 [2024-11-13 23:39:00,884 INFO L134 CoverageAnalysis]: Checked inductivity of 4301 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 4285 trivial. 0 not checked. [2024-11-13 23:39:00,884 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 23:39:01,987 INFO L134 CoverageAnalysis]: Checked inductivity of 4301 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 4285 trivial. 0 not checked. [2024-11-13 23:39:01,988 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [760112528] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 23:39:01,988 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [887062277] [2024-11-13 23:39:01,989 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2024-11-13 23:39:01,989 INFO L166 IcfgInterpreter]: Building call graph [2024-11-13 23:39:01,990 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-13 23:39:01,990 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-13 23:39:01,990 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-13 23:39:02,103 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-13 23:39:02,641 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '9145#(and (<= 0 |ULTIMATE.start_main_~x~0#1|) (<= (+ |ULTIMATE.start_main_~x~0#1| 1) |ULTIMATE.start_main_~pos~0#1|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#vectorx~0#1.base|) (+ (* |ULTIMATE.start_main_~x~0#1| 4) |ULTIMATE.start_main_~#vectorx~0#1.offset|)) |ULTIMATE.start_main_~element~0#1|))' at error location [2024-11-13 23:39:02,641 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-13 23:39:02,641 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 23:39:02,641 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [94, 10, 10] total 112 [2024-11-13 23:39:02,642 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1915855213] [2024-11-13 23:39:02,642 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 23:39:02,642 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 113 states [2024-11-13 23:39:02,642 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-13 23:39:02,644 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 113 interpolants. [2024-11-13 23:39:02,645 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5920, Invalid=8122, Unknown=0, NotChecked=0, Total=14042 [2024-11-13 23:39:02,645 INFO L87 Difference]: Start difference. First operand 293 states and 342 transitions. Second operand has 113 states, 113 states have (on average 1.1592920353982301) internal successors, (131), 112 states have internal predecessors, (131), 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 23:39:25,599 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 23:39:25,599 INFO L93 Difference]: Finished difference Result 769 states and 1135 transitions. [2024-11-13 23:39:25,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 202 states. [2024-11-13 23:39:25,600 INFO L78 Accepts]: Start accepts. Automaton has has 113 states, 113 states have (on average 1.1592920353982301) internal successors, (131), 112 states have internal predecessors, (131), 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 114 [2024-11-13 23:39:25,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 23:39:25,603 INFO L225 Difference]: With dead ends: 769 [2024-11-13 23:39:25,603 INFO L226 Difference]: Without dead ends: 570 [2024-11-13 23:39:25,608 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 632 GetRequests, 316 SyntacticMatches, 1 SemanticMatches, 315 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24075 ImplicationChecksByTransitivity, 28.0s TimeCoverageRelationStatistics Valid=31705, Invalid=68467, Unknown=0, NotChecked=0, Total=100172 [2024-11-13 23:39:25,609 INFO L432 NwaCegarLoop]: 6 mSDtfsCounter, 609 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 359 mSolverCounterSat, 727 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 609 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 1086 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 727 IncrementalHoareTripleChecker+Valid, 359 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2024-11-13 23:39:25,609 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [609 Valid, 44 Invalid, 1086 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [727 Valid, 359 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2024-11-13 23:39:25,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 570 states. [2024-11-13 23:39:25,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 570 to 513. [2024-11-13 23:39:25,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 513 states, 512 states have (on average 1.201171875) internal successors, (615), 512 states have internal predecessors, (615), 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 23:39:25,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 513 states to 513 states and 615 transitions. [2024-11-13 23:39:25,793 INFO L78 Accepts]: Start accepts. Automaton has 513 states and 615 transitions. Word has length 114 [2024-11-13 23:39:25,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 23:39:25,794 INFO L471 AbstractCegarLoop]: Abstraction has 513 states and 615 transitions. [2024-11-13 23:39:25,795 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 113 states, 113 states have (on average 1.1592920353982301) internal successors, (131), 112 states have internal predecessors, (131), 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 23:39:25,795 INFO L276 IsEmpty]: Start isEmpty. Operand 513 states and 615 transitions. [2024-11-13 23:39:25,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2024-11-13 23:39:25,796 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 23:39:25,797 INFO L215 NwaCegarLoop]: trace histogram [100, 5, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 23:39:25,817 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c994953f-a21f-411e-8c2a-d10bed0103b6/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2024-11-13 23:39:25,997 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c994953f-a21f-411e-8c2a-d10bed0103b6/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 23:39:25,998 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 23:39:25,998 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 23:39:25,998 INFO L85 PathProgramCache]: Analyzing trace with hash 435568809, now seen corresponding path program 6 times [2024-11-13 23:39:25,998 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-13 23:39:25,998 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2057656059] [2024-11-13 23:39:25,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 23:39:25,998 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 23:39:26,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 23:39:35,460 INFO L134 CoverageAnalysis]: Checked inductivity of 5082 backedges. 0 proven. 5050 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2024-11-13 23:39:35,460 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-13 23:39:35,460 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2057656059] [2024-11-13 23:39:35,460 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2057656059] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 23:39:35,460 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [526229029] [2024-11-13 23:39:35,460 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-13 23:39:35,460 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 23:39:35,461 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c994953f-a21f-411e-8c2a-d10bed0103b6/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-13 23:39:35,463 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c994953f-a21f-411e-8c2a-d10bed0103b6/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 23:39:35,464 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c994953f-a21f-411e-8c2a-d10bed0103b6/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-11-13 23:39:35,761 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-13 23:39:35,761 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-13 23:39:35,763 INFO L255 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 40 conjuncts are in the unsatisfiable core [2024-11-13 23:39:35,767 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 23:39:36,613 INFO L349 Elim1Store]: treesize reduction 58, result has 30.1 percent of original size [2024-11-13 23:39:36,613 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 45 treesize of output 32 [2024-11-13 23:39:36,805 INFO L349 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2024-11-13 23:39:36,805 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 14 [2024-11-13 23:39:36,932 INFO L349 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2024-11-13 23:39:36,932 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 14 [2024-11-13 23:39:37,057 INFO L349 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2024-11-13 23:39:37,057 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 14 [2024-11-13 23:39:37,583 INFO L134 CoverageAnalysis]: Checked inductivity of 5082 backedges. 4 proven. 28 refuted. 0 times theorem prover too weak. 5050 trivial. 0 not checked. [2024-11-13 23:39:37,584 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 23:40:26,981 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 92 treesize of output 84 [2024-11-13 23:40:27,037 INFO L349 Elim1Store]: treesize reduction 13, result has 48.0 percent of original size [2024-11-13 23:40:27,038 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 10092 treesize of output 6903 [2024-11-13 23:40:27,393 INFO L134 CoverageAnalysis]: Checked inductivity of 5082 backedges. 3 proven. 29 refuted. 0 times theorem prover too weak. 5050 trivial. 0 not checked. [2024-11-13 23:40:27,393 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [526229029] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 23:40:27,394 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [328845627] [2024-11-13 23:40:27,395 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2024-11-13 23:40:27,395 INFO L166 IcfgInterpreter]: Building call graph [2024-11-13 23:40:27,395 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-13 23:40:27,395 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-13 23:40:27,395 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-13 23:40:27,551 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-13 23:40:28,567 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '12928#(and (<= 0 |ULTIMATE.start_main_~x~0#1|) (<= (+ |ULTIMATE.start_main_~x~0#1| 1) |ULTIMATE.start_main_~pos~0#1|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#vectorx~0#1.base|) (+ (* |ULTIMATE.start_main_~x~0#1| 4) |ULTIMATE.start_main_~#vectorx~0#1.offset|)) |ULTIMATE.start_main_~element~0#1|))' at error location [2024-11-13 23:40:28,568 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-13 23:40:28,568 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 23:40:28,568 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [102, 17, 17] total 128 [2024-11-13 23:40:28,568 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [33298330] [2024-11-13 23:40:28,568 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 23:40:28,569 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 128 states [2024-11-13 23:40:28,569 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-13 23:40:28,571 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 128 interpolants. [2024-11-13 23:40:28,572 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5406, Invalid=12403, Unknown=13, NotChecked=0, Total=17822 [2024-11-13 23:40:28,573 INFO L87 Difference]: Start difference. First operand 513 states and 615 transitions. Second operand has 128 states, 128 states have (on average 1.203125) internal successors, (154), 128 states have internal predecessors, (154), 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 23:40:30,714 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-13 23:40:49,100 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2024-11-13 23:40:53,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 23:40:53,113 INFO L93 Difference]: Finished difference Result 1046 states and 1255 transitions. [2024-11-13 23:40:53,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 123 states. [2024-11-13 23:40:53,114 INFO L78 Accepts]: Start accepts. Automaton has has 128 states, 128 states have (on average 1.203125) internal successors, (154), 128 states have internal predecessors, (154), 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 124 [2024-11-13 23:40:53,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 23:40:53,118 INFO L225 Difference]: With dead ends: 1046 [2024-11-13 23:40:53,118 INFO L226 Difference]: Without dead ends: 635 [2024-11-13 23:40:53,120 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 489 GetRequests, 338 SyntacticMatches, 2 SemanticMatches, 149 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3810 ImplicationChecksByTransitivity, 76.0s TimeCoverageRelationStatistics Valid=5926, Invalid=16710, Unknown=14, NotChecked=0, Total=22650 [2024-11-13 23:40:53,121 INFO L432 NwaCegarLoop]: 5 mSDtfsCounter, 31 mSDsluCounter, 104 mSDsCounter, 0 mSdLazyCounter, 997 mSolverCounterSat, 15 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 109 SdHoareTripleChecker+Invalid, 1015 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 997 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.3s IncrementalHoareTripleChecker+Time [2024-11-13 23:40:53,121 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 109 Invalid, 1015 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 997 Invalid, 3 Unknown, 0 Unchecked, 6.3s Time] [2024-11-13 23:40:53,122 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 635 states. [2024-11-13 23:40:53,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 635 to 617. [2024-11-13 23:40:53,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 617 states, 616 states have (on average 1.1688311688311688) internal successors, (720), 616 states have internal predecessors, (720), 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 23:40:53,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 617 states to 617 states and 720 transitions. [2024-11-13 23:40:53,407 INFO L78 Accepts]: Start accepts. Automaton has 617 states and 720 transitions. Word has length 124 [2024-11-13 23:40:53,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 23:40:53,408 INFO L471 AbstractCegarLoop]: Abstraction has 617 states and 720 transitions. [2024-11-13 23:40:53,408 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 128 states, 128 states have (on average 1.203125) internal successors, (154), 128 states have internal predecessors, (154), 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 23:40:53,408 INFO L276 IsEmpty]: Start isEmpty. Operand 617 states and 720 transitions. [2024-11-13 23:40:53,410 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2024-11-13 23:40:53,410 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 23:40:53,410 INFO L215 NwaCegarLoop]: trace histogram [101, 5, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 23:40:53,434 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c994953f-a21f-411e-8c2a-d10bed0103b6/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2024-11-13 23:40:53,610 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c994953f-a21f-411e-8c2a-d10bed0103b6/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2024-11-13 23:40:53,611 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 23:40:53,611 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 23:40:53,612 INFO L85 PathProgramCache]: Analyzing trace with hash -1208744421, now seen corresponding path program 7 times [2024-11-13 23:40:53,612 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-13 23:40:53,612 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1875033206] [2024-11-13 23:40:53,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 23:40:53,612 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 23:40:53,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 23:41:03,351 INFO L134 CoverageAnalysis]: Checked inductivity of 5191 backedges. 0 proven. 5151 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2024-11-13 23:41:03,351 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-13 23:41:03,352 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1875033206] [2024-11-13 23:41:03,352 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1875033206] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 23:41:03,352 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [931456380] [2024-11-13 23:41:03,352 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-13 23:41:03,352 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 23:41:03,352 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c994953f-a21f-411e-8c2a-d10bed0103b6/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-13 23:41:03,354 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c994953f-a21f-411e-8c2a-d10bed0103b6/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 23:41:03,357 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c994953f-a21f-411e-8c2a-d10bed0103b6/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-11-13 23:41:03,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 23:41:03,794 INFO L255 TraceCheckSpWp]: Trace formula consists of 1059 conjuncts, 104 conjuncts are in the unsatisfiable core [2024-11-13 23:41:03,799 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 23:41:11,843 INFO L134 CoverageAnalysis]: Checked inductivity of 5191 backedges. 0 proven. 5151 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2024-11-13 23:41:11,843 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 23:41:33,795 INFO L134 CoverageAnalysis]: Checked inductivity of 5191 backedges. 0 proven. 5151 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2024-11-13 23:41:33,796 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [931456380] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 23:41:33,796 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [68220778] [2024-11-13 23:41:33,797 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2024-11-13 23:41:33,797 INFO L166 IcfgInterpreter]: Building call graph [2024-11-13 23:41:33,797 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-13 23:41:33,797 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-13 23:41:33,798 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-13 23:41:34,051 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-13 23:41:35,107 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '17300#(and (= |ULTIMATE.start_main_~#vectorx~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~x~0#1|) (<= (+ |ULTIMATE.start_main_~x~0#1| 1) |ULTIMATE.start_main_~pos~0#1|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#vectorx~0#1.base|) (* |ULTIMATE.start_main_~x~0#1| 4)) |ULTIMATE.start_main_~element~0#1|))' at error location [2024-11-13 23:41:35,107 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-13 23:41:35,107 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 23:41:35,107 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [103, 103, 103] total 307 [2024-11-13 23:41:35,108 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [136696302] [2024-11-13 23:41:35,108 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 23:41:35,108 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 308 states [2024-11-13 23:41:35,108 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-13 23:41:35,116 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 308 interpolants. [2024-11-13 23:41:35,119 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42260, Invalid=57912, Unknown=0, NotChecked=0, Total=100172 [2024-11-13 23:41:35,119 INFO L87 Difference]: Start difference. First operand 617 states and 720 transitions. Second operand has 308 states, 308 states have (on average 1.0389610389610389) internal successors, (320), 307 states have internal predecessors, (320), 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 23:41:36,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 23:41:36,487 INFO L93 Difference]: Finished difference Result 1236 states and 1545 transitions. [2024-11-13 23:41:36,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 206 states. [2024-11-13 23:41:36,488 INFO L78 Accepts]: Start accepts. Automaton has has 308 states, 308 states have (on average 1.0389610389610389) internal successors, (320), 307 states have internal predecessors, (320), 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 128 [2024-11-13 23:41:36,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 23:41:36,491 INFO L225 Difference]: With dead ends: 1236 [2024-11-13 23:41:36,491 INFO L226 Difference]: Without dead ends: 722 [2024-11-13 23:41:36,496 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 485 GetRequests, 170 SyntacticMatches, 0 SemanticMatches, 315 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 45899 ImplicationChecksByTransitivity, 37.3s TimeCoverageRelationStatistics Valid=42260, Invalid=57912, Unknown=0, NotChecked=0, Total=100172 [2024-11-13 23:41:36,497 INFO L432 NwaCegarLoop]: 8 mSDtfsCounter, 0 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 312 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 314 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 312 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-13 23:41:36,497 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 56 Invalid, 314 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 312 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-11-13 23:41:36,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 722 states. [2024-11-13 23:41:36,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 722 to 720. [2024-11-13 23:41:36,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 720 states, 719 states have (on average 1.144645340751043) internal successors, (823), 719 states have internal predecessors, (823), 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 23:41:36,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 720 states to 720 states and 823 transitions. [2024-11-13 23:41:36,799 INFO L78 Accepts]: Start accepts. Automaton has 720 states and 823 transitions. Word has length 128 [2024-11-13 23:41:36,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 23:41:36,799 INFO L471 AbstractCegarLoop]: Abstraction has 720 states and 823 transitions. [2024-11-13 23:41:36,800 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 308 states, 308 states have (on average 1.0389610389610389) internal successors, (320), 307 states have internal predecessors, (320), 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 23:41:36,800 INFO L276 IsEmpty]: Start isEmpty. Operand 720 states and 823 transitions. [2024-11-13 23:41:36,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 232 [2024-11-13 23:41:36,803 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 23:41:36,803 INFO L215 NwaCegarLoop]: trace histogram [204, 5, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 23:41:36,825 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c994953f-a21f-411e-8c2a-d10bed0103b6/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2024-11-13 23:41:37,004 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c994953f-a21f-411e-8c2a-d10bed0103b6/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2024-11-13 23:41:37,004 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 23:41:37,004 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 23:41:37,004 INFO L85 PathProgramCache]: Analyzing trace with hash 385379893, now seen corresponding path program 8 times [2024-11-13 23:41:37,004 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-13 23:41:37,004 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1874440718] [2024-11-13 23:41:37,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 23:41:37,004 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 23:41:37,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 23:42:15,291 INFO L134 CoverageAnalysis]: Checked inductivity of 20950 backedges. 0 proven. 20910 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2024-11-13 23:42:15,292 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-13 23:42:15,292 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1874440718] [2024-11-13 23:42:15,292 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1874440718] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 23:42:15,292 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1720338302] [2024-11-13 23:42:15,292 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-13 23:42:15,292 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 23:42:15,293 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c994953f-a21f-411e-8c2a-d10bed0103b6/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-13 23:42:15,296 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c994953f-a21f-411e-8c2a-d10bed0103b6/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 23:42:15,298 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c994953f-a21f-411e-8c2a-d10bed0103b6/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-11-13 23:42:15,844 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-11-13 23:42:15,844 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-13 23:42:15,847 INFO L255 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-11-13 23:42:15,853 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 23:42:16,397 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 22 [2024-11-13 23:42:16,700 INFO L134 CoverageAnalysis]: Checked inductivity of 20950 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 20925 trivial. 0 not checked. [2024-11-13 23:42:16,700 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 23:42:20,159 INFO L134 CoverageAnalysis]: Checked inductivity of 20950 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 20925 trivial. 0 not checked. [2024-11-13 23:42:20,159 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1720338302] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 23:42:20,160 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1625439574] [2024-11-13 23:42:20,161 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2024-11-13 23:42:20,161 INFO L166 IcfgInterpreter]: Building call graph [2024-11-13 23:42:20,162 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-13 23:42:20,162 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-13 23:42:20,162 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-13 23:42:20,514 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-13 23:42:22,318 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '22771#(and (= |ULTIMATE.start_main_~#vectorx~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~x~0#1|) (<= (+ |ULTIMATE.start_main_~x~0#1| 1) |ULTIMATE.start_main_~pos~0#1|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#vectorx~0#1.base|) (* |ULTIMATE.start_main_~x~0#1| 4)) |ULTIMATE.start_main_~element~0#1|))' at error location [2024-11-13 23:42:22,318 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-13 23:42:22,318 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 23:42:22,319 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [206, 12, 12] total 228 [2024-11-13 23:42:22,319 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [669626786] [2024-11-13 23:42:22,319 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 23:42:22,319 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 229 states [2024-11-13 23:42:22,319 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-13 23:42:22,322 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 229 interpolants. [2024-11-13 23:42:22,324 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25246, Invalid=31160, Unknown=0, NotChecked=0, Total=56406 [2024-11-13 23:42:22,324 INFO L87 Difference]: Start difference. First operand 720 states and 823 transitions. Second operand has 229 states, 229 states have (on average 1.0786026200873362) internal successors, (247), 228 states have internal predecessors, (247), 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 23:44:12,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 23:44:12,425 INFO L93 Difference]: Finished difference Result 1922 states and 2805 transitions. [2024-11-13 23:44:12,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 430 states. [2024-11-13 23:44:12,426 INFO L78 Accepts]: Start accepts. Automaton has has 229 states, 229 states have (on average 1.0786026200873362) internal successors, (247), 228 states have internal predecessors, (247), 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 231 [2024-11-13 23:44:12,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 23:44:12,432 INFO L225 Difference]: With dead ends: 1922 [2024-11-13 23:44:12,432 INFO L226 Difference]: Without dead ends: 1408 [2024-11-13 23:44:12,452 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 1323 GetRequests, 661 SyntacticMatches, 0 SemanticMatches, 662 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 103281 ImplicationChecksByTransitivity, 127.2s TimeCoverageRelationStatistics Valid=141405, Invalid=298827, Unknown=0, NotChecked=0, Total=440232 [2024-11-13 23:44:12,453 INFO L432 NwaCegarLoop]: 6 mSDtfsCounter, 1286 mSDsluCounter, 56 mSDsCounter, 0 mSdLazyCounter, 725 mSolverCounterSat, 1728 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1286 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 2453 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1728 IncrementalHoareTripleChecker+Valid, 725 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2024-11-13 23:44:12,453 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [1286 Valid, 62 Invalid, 2453 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1728 Valid, 725 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2024-11-13 23:44:12,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1408 states. [2024-11-13 23:44:13,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1408 to 1295. [2024-11-13 23:44:13,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1295 states, 1294 states have (on average 1.1676970633693973) internal successors, (1511), 1294 states have internal predecessors, (1511), 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 23:44:13,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1295 states to 1295 states and 1511 transitions. [2024-11-13 23:44:13,136 INFO L78 Accepts]: Start accepts. Automaton has 1295 states and 1511 transitions. Word has length 231 [2024-11-13 23:44:13,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 23:44:13,137 INFO L471 AbstractCegarLoop]: Abstraction has 1295 states and 1511 transitions. [2024-11-13 23:44:13,137 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 229 states, 229 states have (on average 1.0786026200873362) internal successors, (247), 228 states have internal predecessors, (247), 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 23:44:13,137 INFO L276 IsEmpty]: Start isEmpty. Operand 1295 states and 1511 transitions. [2024-11-13 23:44:13,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 244 [2024-11-13 23:44:13,140 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 23:44:13,141 INFO L215 NwaCegarLoop]: trace histogram [214, 6, 5, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 23:44:13,163 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c994953f-a21f-411e-8c2a-d10bed0103b6/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2024-11-13 23:44:13,344 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c994953f-a21f-411e-8c2a-d10bed0103b6/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2024-11-13 23:44:13,345 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 23:44:13,345 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 23:44:13,345 INFO L85 PathProgramCache]: Analyzing trace with hash -131507220, now seen corresponding path program 9 times [2024-11-13 23:44:13,345 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-13 23:44:13,345 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [402405914] [2024-11-13 23:44:13,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 23:44:13,345 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 23:44:13,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 23:44:46,073 INFO L134 CoverageAnalysis]: Checked inductivity of 23056 backedges. 0 proven. 23005 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2024-11-13 23:44:46,073 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-13 23:44:46,073 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [402405914] [2024-11-13 23:44:46,073 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [402405914] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 23:44:46,073 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1728645217] [2024-11-13 23:44:46,073 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-13 23:44:46,073 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 23:44:46,073 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c994953f-a21f-411e-8c2a-d10bed0103b6/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-13 23:44:46,077 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c994953f-a21f-411e-8c2a-d10bed0103b6/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 23:44:46,082 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c994953f-a21f-411e-8c2a-d10bed0103b6/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-11-13 23:44:46,576 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-13 23:44:46,576 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-13 23:44:46,579 INFO L255 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 47 conjuncts are in the unsatisfiable core [2024-11-13 23:44:46,585 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 23:44:47,918 INFO L349 Elim1Store]: treesize reduction 58, result has 30.1 percent of original size [2024-11-13 23:44:47,919 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 45 treesize of output 32 [2024-11-13 23:44:48,088 INFO L349 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2024-11-13 23:44:48,089 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 14 [2024-11-13 23:44:48,251 INFO L349 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2024-11-13 23:44:48,251 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 14 [2024-11-13 23:44:48,413 INFO L349 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2024-11-13 23:44:48,413 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 14 [2024-11-13 23:44:48,583 INFO L349 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2024-11-13 23:44:48,583 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 14 [2024-11-13 23:44:49,468 INFO L134 CoverageAnalysis]: Checked inductivity of 23056 backedges. 7 proven. 44 refuted. 0 times theorem prover too weak. 23005 trivial. 0 not checked. [2024-11-13 23:44:49,468 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 23:46:08,879 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 73 treesize of output 65 [2024-11-13 23:46:08,909 INFO L349 Elim1Store]: treesize reduction 13, result has 48.0 percent of original size [2024-11-13 23:46:08,909 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 1294 treesize of output 901 [2024-11-13 23:46:09,088 INFO L134 CoverageAnalysis]: Checked inductivity of 23056 backedges. 5 proven. 45 refuted. 1 times theorem prover too weak. 23005 trivial. 0 not checked. [2024-11-13 23:46:09,088 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1728645217] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 23:46:09,088 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [590585580] [2024-11-13 23:46:09,091 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2024-11-13 23:46:09,091 INFO L166 IcfgInterpreter]: Building call graph [2024-11-13 23:46:09,091 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-13 23:46:09,091 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-13 23:46:09,092 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-13 23:46:09,303 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-13 23:46:10,696 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '31704#(and (<= 0 |ULTIMATE.start_main_~x~0#1|) (<= (+ |ULTIMATE.start_main_~x~0#1| 1) |ULTIMATE.start_main_~pos~0#1|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#vectorx~0#1.base|) (+ (* |ULTIMATE.start_main_~x~0#1| 4) |ULTIMATE.start_main_~#vectorx~0#1.offset|)) |ULTIMATE.start_main_~element~0#1|))' at error location [2024-11-13 23:46:10,697 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-13 23:46:10,697 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 23:46:10,697 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [216, 20, 20] total 247 [2024-11-13 23:46:10,697 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1227670297] [2024-11-13 23:46:10,697 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 23:46:10,698 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 247 states [2024-11-13 23:46:10,698 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-13 23:46:10,703 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 247 interpolants. [2024-11-13 23:46:10,705 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23626, Invalid=40111, Unknown=19, NotChecked=0, Total=63756 [2024-11-13 23:46:10,706 INFO L87 Difference]: Start difference. First operand 1295 states and 1511 transitions. Second operand has 247 states, 247 states have (on average 1.1214574898785425) internal successors, (277), 247 states have internal predecessors, (277), 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 23:46:12,963 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-13 23:46:15,727 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-13 23:46:59,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 23:46:59,982 INFO L93 Difference]: Finished difference Result 2614 states and 3052 transitions. [2024-11-13 23:46:59,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 241 states. [2024-11-13 23:46:59,982 INFO L78 Accepts]: Start accepts. Automaton has has 247 states, 247 states have (on average 1.1214574898785425) internal successors, (277), 247 states have internal predecessors, (277), 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 243 [2024-11-13 23:46:59,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 23:46:59,988 INFO L225 Difference]: With dead ends: 2614 [2024-11-13 23:46:59,988 INFO L226 Difference]: Without dead ends: 1535 [2024-11-13 23:46:59,992 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 964 GetRequests, 690 SyntacticMatches, 2 SemanticMatches, 272 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8792 ImplicationChecksByTransitivity, 148.7s TimeCoverageRelationStatistics Valid=24775, Invalid=50005, Unknown=22, NotChecked=0, Total=74802 [2024-11-13 23:46:59,993 INFO L432 NwaCegarLoop]: 6 mSDtfsCounter, 35 mSDsluCounter, 113 mSDsCounter, 0 mSdLazyCounter, 1192 mSolverCounterSat, 20 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 119 SdHoareTripleChecker+Invalid, 1214 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 1192 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.3s IncrementalHoareTripleChecker+Time [2024-11-13 23:46:59,993 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [35 Valid, 119 Invalid, 1214 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 1192 Invalid, 2 Unknown, 0 Unchecked, 6.3s Time] [2024-11-13 23:46:59,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1535 states. [2024-11-13 23:47:01,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1535 to 1512. [2024-11-13 23:47:01,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1512 states, 1511 states have (on average 1.14427531436135) internal successors, (1729), 1511 states have internal predecessors, (1729), 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 23:47:01,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1512 states to 1512 states and 1729 transitions. [2024-11-13 23:47:01,181 INFO L78 Accepts]: Start accepts. Automaton has 1512 states and 1729 transitions. Word has length 243 [2024-11-13 23:47:01,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 23:47:01,182 INFO L471 AbstractCegarLoop]: Abstraction has 1512 states and 1729 transitions. [2024-11-13 23:47:01,182 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 247 states, 247 states have (on average 1.1214574898785425) internal successors, (277), 247 states have internal predecessors, (277), 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 23:47:01,183 INFO L276 IsEmpty]: Start isEmpty. Operand 1512 states and 1729 transitions. [2024-11-13 23:47:01,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 248 [2024-11-13 23:47:01,186 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 23:47:01,186 INFO L215 NwaCegarLoop]: trace histogram [215, 6, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 23:47:01,208 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c994953f-a21f-411e-8c2a-d10bed0103b6/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2024-11-13 23:47:01,390 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c994953f-a21f-411e-8c2a-d10bed0103b6/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2024-11-13 23:47:01,390 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 23:47:01,391 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 23:47:01,391 INFO L85 PathProgramCache]: Analyzing trace with hash -812857492, now seen corresponding path program 10 times [2024-11-13 23:47:01,391 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-13 23:47:01,391 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1474015905] [2024-11-13 23:47:01,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 23:47:01,391 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 23:47:01,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 23:47:35,842 INFO L134 CoverageAnalysis]: Checked inductivity of 23282 backedges. 0 proven. 23220 refuted. 0 times theorem prover too weak. 62 trivial. 0 not checked. [2024-11-13 23:47:35,842 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-13 23:47:35,842 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1474015905] [2024-11-13 23:47:35,842 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1474015905] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 23:47:35,842 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1776237395] [2024-11-13 23:47:35,842 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-13 23:47:35,842 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 23:47:35,842 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c994953f-a21f-411e-8c2a-d10bed0103b6/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-13 23:47:35,844 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c994953f-a21f-411e-8c2a-d10bed0103b6/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 23:47:35,845 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c994953f-a21f-411e-8c2a-d10bed0103b6/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-11-13 23:47:36,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 23:47:36,615 INFO L255 TraceCheckSpWp]: Trace formula consists of 2108 conjuncts, 218 conjuncts are in the unsatisfiable core [2024-11-13 23:47:36,623 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 23:48:07,370 INFO L134 CoverageAnalysis]: Checked inductivity of 23282 backedges. 0 proven. 23220 refuted. 0 times theorem prover too weak. 62 trivial. 0 not checked. [2024-11-13 23:48:07,370 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 23:49:31,656 INFO L134 CoverageAnalysis]: Checked inductivity of 23282 backedges. 0 proven. 23220 refuted. 0 times theorem prover too weak. 62 trivial. 0 not checked. [2024-11-13 23:49:31,656 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1776237395] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 23:49:31,657 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [837390167] [2024-11-13 23:49:31,658 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2024-11-13 23:49:31,658 INFO L166 IcfgInterpreter]: Building call graph [2024-11-13 23:49:31,658 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-13 23:49:31,659 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-13 23:49:31,659 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-13 23:49:31,941 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-13 23:49:33,791 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '42052#(and (= |ULTIMATE.start_main_~#vectorx~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~x~0#1|) (<= (+ |ULTIMATE.start_main_~x~0#1| 1) |ULTIMATE.start_main_~pos~0#1|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#vectorx~0#1.base|) (* |ULTIMATE.start_main_~x~0#1| 4)) |ULTIMATE.start_main_~element~0#1|))' at error location [2024-11-13 23:49:33,791 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-13 23:49:33,791 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 23:49:33,791 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [217, 217, 217] total 649 [2024-11-13 23:49:33,791 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1284738265] [2024-11-13 23:49:33,791 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 23:49:33,792 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 650 states [2024-11-13 23:49:33,792 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-13 23:49:33,829 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 650 interpolants. [2024-11-13 23:49:33,845 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=187952, Invalid=245670, Unknown=0, NotChecked=0, Total=433622 [2024-11-13 23:49:33,845 INFO L87 Difference]: Start difference. First operand 1512 states and 1729 transitions. Second operand has 650 states, 650 states have (on average 1.0184615384615385) internal successors, (662), 649 states have internal predecessors, (662), 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 23:49:41,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 23:49:41,375 INFO L93 Difference]: Finished difference Result 3026 states and 3677 transitions. [2024-11-13 23:49:41,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 434 states. [2024-11-13 23:49:41,376 INFO L78 Accepts]: Start accepts. Automaton has has 650 states, 650 states have (on average 1.0184615384615385) internal successors, (662), 649 states have internal predecessors, (662), 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 247 [2024-11-13 23:49:41,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 23:49:41,382 INFO L225 Difference]: With dead ends: 3026 [2024-11-13 23:49:41,382 INFO L226 Difference]: Without dead ends: 1731 [2024-11-13 23:49:41,400 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 956 GetRequests, 299 SyntacticMatches, 0 SemanticMatches, 657 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 195695 ImplicationChecksByTransitivity, 142.2s TimeCoverageRelationStatistics Valid=187952, Invalid=245670, Unknown=0, NotChecked=0, Total=433622 [2024-11-13 23:49:41,401 INFO L432 NwaCegarLoop]: 8 mSDtfsCounter, 0 mSDsluCounter, 66 mSDsCounter, 0 mSdLazyCounter, 625 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 74 SdHoareTripleChecker+Invalid, 627 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 625 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-11-13 23:49:41,401 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 74 Invalid, 627 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 625 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-11-13 23:49:41,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1731 states. [2024-11-13 23:49:42,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1731 to 1729. [2024-11-13 23:49:42,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1729 states, 1728 states have (on average 1.1261574074074074) internal successors, (1946), 1728 states have internal predecessors, (1946), 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 23:49:42,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1729 states to 1729 states and 1946 transitions. [2024-11-13 23:49:42,302 INFO L78 Accepts]: Start accepts. Automaton has 1729 states and 1946 transitions. Word has length 247 [2024-11-13 23:49:42,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 23:49:42,302 INFO L471 AbstractCegarLoop]: Abstraction has 1729 states and 1946 transitions. [2024-11-13 23:49:42,303 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 650 states, 650 states have (on average 1.0184615384615385) internal successors, (662), 649 states have internal predecessors, (662), 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 23:49:42,303 INFO L276 IsEmpty]: Start isEmpty. Operand 1729 states and 1946 transitions. [2024-11-13 23:49:42,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 465 [2024-11-13 23:49:42,309 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 23:49:42,310 INFO L215 NwaCegarLoop]: trace histogram [432, 6, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 23:49:42,332 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c994953f-a21f-411e-8c2a-d10bed0103b6/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2024-11-13 23:49:42,510 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c994953f-a21f-411e-8c2a-d10bed0103b6/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2024-11-13 23:49:42,510 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 23:49:42,510 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 23:49:42,511 INFO L85 PathProgramCache]: Analyzing trace with hash 881711954, now seen corresponding path program 11 times [2024-11-13 23:49:42,511 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-13 23:49:42,511 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1970530382] [2024-11-13 23:49:42,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 23:49:42,511 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 23:49:43,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat