./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-industry-pattern/array_mul_init.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 826ab2ba Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9312754-6eab-4268-80e0-e5fdd76fed27/bin/utaipan-verify-sOmjnqqW8E/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9312754-6eab-4268-80e0-e5fdd76fed27/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_c9312754-6eab-4268-80e0-e5fdd76fed27/bin/utaipan-verify-sOmjnqqW8E/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9312754-6eab-4268-80e0-e5fdd76fed27/bin/utaipan-verify-sOmjnqqW8E/config/TaipanReach.xml -i ../../sv-benchmarks/c/array-industry-pattern/array_mul_init.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9312754-6eab-4268-80e0-e5fdd76fed27/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_c9312754-6eab-4268-80e0-e5fdd76fed27/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 09dc663f7f76eee13b6af61297831e3fbddcb16c16389bf8d94f2d27048733d0 --- Real Ultimate output --- This is Ultimate 0.3.0-dev-826ab2b [2024-11-14 04:28:19,868 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-14 04:28:19,941 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9312754-6eab-4268-80e0-e5fdd76fed27/bin/utaipan-verify-sOmjnqqW8E/config/svcomp-Reach-32bit-Taipan_Default.epf [2024-11-14 04:28:19,947 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-14 04:28:19,948 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-14 04:28:19,972 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-14 04:28:19,973 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-14 04:28:19,973 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-14 04:28:19,973 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-14 04:28:19,974 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-14 04:28:19,974 INFO L153 SettingsManager]: * User list type=DISABLED [2024-11-14 04:28:19,974 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2024-11-14 04:28:19,974 INFO L153 SettingsManager]: * Explicit value domain=true [2024-11-14 04:28:19,976 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2024-11-14 04:28:19,977 INFO L153 SettingsManager]: * Octagon Domain=false [2024-11-14 04:28:19,978 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2024-11-14 04:28:19,978 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2024-11-14 04:28:19,978 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2024-11-14 04:28:19,978 INFO L153 SettingsManager]: * Interval Domain=false [2024-11-14 04:28:19,978 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2024-11-14 04:28:19,978 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2024-11-14 04:28:19,979 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2024-11-14 04:28:19,979 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-14 04:28:19,979 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-14 04:28:19,979 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-14 04:28:19,979 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-14 04:28:19,979 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-14 04:28:19,979 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-14 04:28:19,979 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-14 04:28:19,979 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-14 04:28:19,980 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-14 04:28:19,980 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-14 04:28:19,980 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-14 04:28:19,980 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-14 04:28:19,980 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-14 04:28:19,980 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-14 04:28:19,980 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-14 04:28:19,980 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-14 04:28:19,980 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2024-11-14 04:28:19,980 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-14 04:28:19,981 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-14 04:28:19,981 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-14 04:28:19,981 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2024-11-14 04:28:19,981 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-14 04:28:19,981 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-14 04:28:19,982 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2024-11-14 04:28:19,982 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-14 04:28:19,982 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_c9312754-6eab-4268-80e0-e5fdd76fed27/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 -> 09dc663f7f76eee13b6af61297831e3fbddcb16c16389bf8d94f2d27048733d0 [2024-11-14 04:28:20,392 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-14 04:28:20,405 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-14 04:28:20,409 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-14 04:28:20,413 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-14 04:28:20,413 INFO L274 PluginConnector]: CDTParser initialized [2024-11-14 04:28:20,416 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9312754-6eab-4268-80e0-e5fdd76fed27/bin/utaipan-verify-sOmjnqqW8E/../../sv-benchmarks/c/array-industry-pattern/array_mul_init.i Unable to find full path for "g++" [2024-11-14 04:28:22,497 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-14 04:28:22,835 INFO L384 CDTParser]: Found 1 translation units. [2024-11-14 04:28:22,836 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9312754-6eab-4268-80e0-e5fdd76fed27/sv-benchmarks/c/array-industry-pattern/array_mul_init.i [2024-11-14 04:28:22,866 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9312754-6eab-4268-80e0-e5fdd76fed27/bin/utaipan-verify-sOmjnqqW8E/data/389af6a46/1577bef9a0a849d695086a3bdfe14ce9/FLAGe3f0958ad [2024-11-14 04:28:22,905 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9312754-6eab-4268-80e0-e5fdd76fed27/bin/utaipan-verify-sOmjnqqW8E/data/389af6a46/1577bef9a0a849d695086a3bdfe14ce9 [2024-11-14 04:28:22,908 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-14 04:28:22,911 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-14 04:28:22,914 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-14 04:28:22,915 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-14 04:28:22,920 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-14 04:28:22,922 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.11 04:28:22" (1/1) ... [2024-11-14 04:28:22,923 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5be97dd8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 04:28:22, skipping insertion in model container [2024-11-14 04:28:22,926 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.11 04:28:22" (1/1) ... [2024-11-14 04:28:22,945 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-14 04:28:23,154 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_c9312754-6eab-4268-80e0-e5fdd76fed27/sv-benchmarks/c/array-industry-pattern/array_mul_init.i[807,820] [2024-11-14 04:28:23,177 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-14 04:28:23,190 INFO L200 MainTranslator]: Completed pre-run [2024-11-14 04:28:23,204 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_c9312754-6eab-4268-80e0-e5fdd76fed27/sv-benchmarks/c/array-industry-pattern/array_mul_init.i[807,820] [2024-11-14 04:28:23,222 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-14 04:28:23,248 INFO L204 MainTranslator]: Completed translation [2024-11-14 04:28:23,249 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 04:28:23 WrapperNode [2024-11-14 04:28:23,249 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-14 04:28:23,251 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-14 04:28:23,251 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-14 04:28:23,252 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-14 04:28:23,260 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 04:28:23" (1/1) ... [2024-11-14 04:28:23,273 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 04:28:23" (1/1) ... [2024-11-14 04:28:23,300 INFO L138 Inliner]: procedures = 16, calls = 20, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 70 [2024-11-14 04:28:23,302 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-14 04:28:23,303 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-14 04:28:23,303 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-14 04:28:23,304 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-14 04:28:23,312 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 04:28:23" (1/1) ... [2024-11-14 04:28:23,313 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 04:28:23" (1/1) ... [2024-11-14 04:28:23,316 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 04:28:23" (1/1) ... [2024-11-14 04:28:23,316 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 04:28:23" (1/1) ... [2024-11-14 04:28:23,325 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 04:28:23" (1/1) ... [2024-11-14 04:28:23,336 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 04:28:23" (1/1) ... [2024-11-14 04:28:23,337 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 04:28:23" (1/1) ... [2024-11-14 04:28:23,338 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 04:28:23" (1/1) ... [2024-11-14 04:28:23,344 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-14 04:28:23,345 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-14 04:28:23,345 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-14 04:28:23,345 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-14 04:28:23,346 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 04:28:23" (1/1) ... [2024-11-14 04:28:23,357 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2024-11-14 04:28:23,372 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9312754-6eab-4268-80e0-e5fdd76fed27/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 04:28:23,392 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9312754-6eab-4268-80e0-e5fdd76fed27/bin/utaipan-verify-sOmjnqqW8E/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2024-11-14 04:28:23,396 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9312754-6eab-4268-80e0-e5fdd76fed27/bin/utaipan-verify-sOmjnqqW8E/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2024-11-14 04:28:23,432 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-14 04:28:23,433 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2024-11-14 04:28:23,433 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-11-14 04:28:23,433 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2024-11-14 04:28:23,433 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-14 04:28:23,433 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-14 04:28:23,434 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2024-11-14 04:28:23,434 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-11-14 04:28:23,541 INFO L238 CfgBuilder]: Building ICFG [2024-11-14 04:28:23,544 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-14 04:28:23,772 INFO L? ?]: Removed 15 outVars from TransFormulas that were not future-live. [2024-11-14 04:28:23,772 INFO L287 CfgBuilder]: Performing block encoding [2024-11-14 04:28:23,867 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-14 04:28:23,868 INFO L316 CfgBuilder]: Removed 3 assume(true) statements. [2024-11-14 04:28:23,868 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.11 04:28:23 BoogieIcfgContainer [2024-11-14 04:28:23,869 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-14 04:28:23,872 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-14 04:28:23,872 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-14 04:28:23,878 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-14 04:28:23,878 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.11 04:28:22" (1/3) ... [2024-11-14 04:28:23,879 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@221b2bf9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.11 04:28:23, skipping insertion in model container [2024-11-14 04:28:23,880 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 04:28:23" (2/3) ... [2024-11-14 04:28:23,880 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@221b2bf9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.11 04:28:23, skipping insertion in model container [2024-11-14 04:28:23,880 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.11 04:28:23" (3/3) ... [2024-11-14 04:28:23,882 INFO L112 eAbstractionObserver]: Analyzing ICFG array_mul_init.i [2024-11-14 04:28:23,899 INFO L217 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-14 04:28:23,901 INFO L154 ceAbstractionStarter]: Applying trace abstraction to ICFG array_mul_init.i that has 1 procedures, 9 locations, 1 initial locations, 3 loop locations, and 1 error locations. [2024-11-14 04:28:23,978 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-14 04:28:23,999 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;@4a6fb583, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-14 04:28:23,999 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-11-14 04:28:24,005 INFO L276 IsEmpty]: Start isEmpty. Operand has 9 states, 7 states have (on average 1.7142857142857142) internal successors, (12), 8 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:28:24,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2024-11-14 04:28:24,013 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:28:24,013 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2024-11-14 04:28:24,014 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 04:28:24,022 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:28:24,023 INFO L85 PathProgramCache]: Analyzing trace with hash -1416035497, now seen corresponding path program 1 times [2024-11-14 04:28:24,033 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:28:24,033 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1563996167] [2024-11-14 04:28:24,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:28:24,034 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:28:24,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:28:24,327 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 04:28:24,327 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:28:24,328 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1563996167] [2024-11-14 04:28:24,329 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1563996167] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 04:28:24,329 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-14 04:28:24,329 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-14 04:28:24,331 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [77143281] [2024-11-14 04:28:24,332 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 04:28:24,337 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-14 04:28:24,337 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 04:28:24,361 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-14 04:28:24,362 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-14 04:28:24,364 INFO L87 Difference]: Start difference. First operand has 9 states, 7 states have (on average 1.7142857142857142) internal successors, (12), 8 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 2.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:28:24,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:28:24,433 INFO L93 Difference]: Finished difference Result 23 states and 32 transitions. [2024-11-14 04:28:24,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-14 04:28:24,437 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2024-11-14 04:28:24,438 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:28:24,446 INFO L225 Difference]: With dead ends: 23 [2024-11-14 04:28:24,448 INFO L226 Difference]: Without dead ends: 15 [2024-11-14 04:28:24,454 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-14 04:28:24,460 INFO L432 NwaCegarLoop]: 3 mSDtfsCounter, 4 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-14 04:28:24,461 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 6 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-14 04:28:24,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2024-11-14 04:28:24,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 10. [2024-11-14 04:28:24,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10 states, 9 states have (on average 1.3333333333333333) internal successors, (12), 9 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:28:24,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 12 transitions. [2024-11-14 04:28:24,493 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 12 transitions. Word has length 6 [2024-11-14 04:28:24,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:28:24,494 INFO L471 AbstractCegarLoop]: Abstraction has 10 states and 12 transitions. [2024-11-14 04:28:24,494 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:28:24,494 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 12 transitions. [2024-11-14 04:28:24,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2024-11-14 04:28:24,495 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:28:24,495 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 04:28:24,495 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-14 04:28:24,495 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 04:28:24,496 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:28:24,496 INFO L85 PathProgramCache]: Analyzing trace with hash 1555848752, now seen corresponding path program 1 times [2024-11-14 04:28:24,496 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:28:24,496 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [574272679] [2024-11-14 04:28:24,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:28:24,497 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:28:24,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:28:24,702 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-14 04:28:24,702 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:28:24,702 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [574272679] [2024-11-14 04:28:24,702 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [574272679] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 04:28:24,702 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [250634668] [2024-11-14 04:28:24,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:28:24,703 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:28:24,703 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9312754-6eab-4268-80e0-e5fdd76fed27/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 04:28:24,707 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9312754-6eab-4268-80e0-e5fdd76fed27/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 04:28:24,710 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9312754-6eab-4268-80e0-e5fdd76fed27/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-14 04:28:24,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:28:24,836 INFO L255 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-11-14 04:28:24,843 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 04:28:24,911 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-14 04:28:24,912 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 04:28:24,947 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-14 04:28:24,947 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [250634668] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 04:28:24,948 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [10049374] [2024-11-14 04:28:24,972 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2024-11-14 04:28:24,972 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 04:28:24,976 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 04:28:24,982 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 04:28:24,982 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 04:28:25,825 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 04:28:26,143 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '112#(and (not (= (select (select |#memory_int| |ULTIMATE.start_main_~#b~0#1.base|) 0) (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) 0))) (<= 1 |#StackHeapBarrier|) (= |ULTIMATE.start_main_~i~0#1| 0) (= |ULTIMATE.start_main_~#b~0#1.offset| 0) (not (= (select (select |#memory_int| |ULTIMATE.start_main_~#b~0#1.base|) 0) (* (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) 0) (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) 0)))) (<= 2 |ULTIMATE.start_main_~#b~0#1.base|) (<= 2 |ULTIMATE.start_main_~#a~0#1.base|) (= |ULTIMATE.start_main_~#a~0#1.offset| 0))' at error location [2024-11-14 04:28:26,144 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 04:28:26,144 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 04:28:26,145 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2024-11-14 04:28:26,145 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [553554796] [2024-11-14 04:28:26,146 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 04:28:26,146 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-14 04:28:26,147 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 04:28:26,148 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-14 04:28:26,149 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=61, Unknown=0, NotChecked=0, Total=110 [2024-11-14 04:28:26,149 INFO L87 Difference]: Start difference. First operand 10 states and 12 transitions. Second operand has 7 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 6 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:28:26,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:28:26,260 INFO L93 Difference]: Finished difference Result 39 states and 48 transitions. [2024-11-14 04:28:26,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-14 04:28:26,262 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 6 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2024-11-14 04:28:26,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:28:26,262 INFO L225 Difference]: With dead ends: 39 [2024-11-14 04:28:26,263 INFO L226 Difference]: Without dead ends: 32 [2024-11-14 04:28:26,263 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 14 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=49, Invalid=61, Unknown=0, NotChecked=0, Total=110 [2024-11-14 04:28:26,264 INFO L432 NwaCegarLoop]: 3 mSDtfsCounter, 20 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 15 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-14 04:28:26,266 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 15 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-14 04:28:26,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2024-11-14 04:28:26,272 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 16. [2024-11-14 04:28:26,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 15 states have (on average 1.2) internal successors, (18), 15 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:28:26,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 18 transitions. [2024-11-14 04:28:26,274 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 18 transitions. Word has length 8 [2024-11-14 04:28:26,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:28:26,275 INFO L471 AbstractCegarLoop]: Abstraction has 16 states and 18 transitions. [2024-11-14 04:28:26,275 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 6 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:28:26,275 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 18 transitions. [2024-11-14 04:28:26,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2024-11-14 04:28:26,276 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:28:26,276 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1] [2024-11-14 04:28:26,300 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9312754-6eab-4268-80e0-e5fdd76fed27/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-11-14 04:28:26,480 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9312754-6eab-4268-80e0-e5fdd76fed27/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:28:26,482 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 04:28:26,483 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:28:26,483 INFO L85 PathProgramCache]: Analyzing trace with hash 1055710871, now seen corresponding path program 2 times [2024-11-14 04:28:26,483 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:28:26,483 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [426762719] [2024-11-14 04:28:26,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:28:26,483 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:28:26,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:28:26,891 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-11-14 04:28:26,893 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:28:26,893 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [426762719] [2024-11-14 04:28:26,893 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [426762719] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 04:28:26,893 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1699944129] [2024-11-14 04:28:26,894 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-14 04:28:26,894 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:28:26,894 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9312754-6eab-4268-80e0-e5fdd76fed27/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 04:28:26,897 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9312754-6eab-4268-80e0-e5fdd76fed27/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 04:28:26,901 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9312754-6eab-4268-80e0-e5fdd76fed27/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-14 04:28:27,108 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-11-14 04:28:27,108 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 04:28:27,110 INFO L255 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-14 04:28:27,112 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 04:28:27,145 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-11-14 04:28:27,145 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 04:28:27,258 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-11-14 04:28:27,259 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1699944129] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 04:28:27,259 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1777869301] [2024-11-14 04:28:27,261 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2024-11-14 04:28:27,261 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 04:28:27,261 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 04:28:27,262 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 04:28:27,262 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 04:28:27,669 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 04:28:27,892 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '291#(and (not (= (select (select |#memory_int| |ULTIMATE.start_main_~#b~0#1.base|) 0) (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) 0))) (<= 1 |#StackHeapBarrier|) (= |ULTIMATE.start_main_~i~0#1| 0) (= |ULTIMATE.start_main_~#b~0#1.offset| 0) (not (= (select (select |#memory_int| |ULTIMATE.start_main_~#b~0#1.base|) 0) (* (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) 0) (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) 0)))) (<= 2 |ULTIMATE.start_main_~#b~0#1.base|) (<= 2 |ULTIMATE.start_main_~#a~0#1.base|) (= |ULTIMATE.start_main_~#a~0#1.offset| 0))' at error location [2024-11-14 04:28:27,892 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 04:28:27,892 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 04:28:27,893 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 13 [2024-11-14 04:28:27,893 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1797248903] [2024-11-14 04:28:27,893 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 04:28:27,893 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-11-14 04:28:27,893 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 04:28:27,894 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-11-14 04:28:27,894 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=148, Unknown=0, NotChecked=0, Total=272 [2024-11-14 04:28:27,894 INFO L87 Difference]: Start difference. First operand 16 states and 18 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:28:28,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:28:28,126 INFO L93 Difference]: Finished difference Result 84 states and 99 transitions. [2024-11-14 04:28:28,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-11-14 04:28:28,127 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2024-11-14 04:28:28,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:28:28,128 INFO L225 Difference]: With dead ends: 84 [2024-11-14 04:28:28,128 INFO L226 Difference]: Without dead ends: 74 [2024-11-14 04:28:28,128 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=124, Invalid=148, Unknown=0, NotChecked=0, Total=272 [2024-11-14 04:28:28,129 INFO L432 NwaCegarLoop]: 3 mSDtfsCounter, 108 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 108 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 92 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-14 04:28:28,130 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [108 Valid, 30 Invalid, 92 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-14 04:28:28,131 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2024-11-14 04:28:28,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 28. [2024-11-14 04:28:28,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 27 states have (on average 1.1111111111111112) internal successors, (30), 27 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:28:28,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 30 transitions. [2024-11-14 04:28:28,137 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 30 transitions. Word has length 14 [2024-11-14 04:28:28,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:28:28,137 INFO L471 AbstractCegarLoop]: Abstraction has 28 states and 30 transitions. [2024-11-14 04:28:28,137 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:28:28,137 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 30 transitions. [2024-11-14 04:28:28,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2024-11-14 04:28:28,138 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:28:28,138 INFO L215 NwaCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1] [2024-11-14 04:28:28,163 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9312754-6eab-4268-80e0-e5fdd76fed27/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-11-14 04:28:28,342 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9312754-6eab-4268-80e0-e5fdd76fed27/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:28:28,342 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 04:28:28,343 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:28:28,343 INFO L85 PathProgramCache]: Analyzing trace with hash 1422666615, now seen corresponding path program 3 times [2024-11-14 04:28:28,343 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:28:28,343 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1231603175] [2024-11-14 04:28:28,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:28:28,343 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:28:28,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:28:29,000 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2024-11-14 04:28:29,001 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:28:29,001 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1231603175] [2024-11-14 04:28:29,001 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1231603175] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 04:28:29,001 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1150808594] [2024-11-14 04:28:29,003 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-14 04:28:29,003 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:28:29,003 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9312754-6eab-4268-80e0-e5fdd76fed27/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 04:28:29,005 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9312754-6eab-4268-80e0-e5fdd76fed27/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 04:28:29,008 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9312754-6eab-4268-80e0-e5fdd76fed27/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-14 04:28:29,201 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-14 04:28:29,201 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 04:28:29,204 INFO L255 TraceCheckSpWp]: Trace formula consists of 275 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-11-14 04:28:29,206 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 04:28:29,260 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2024-11-14 04:28:29,261 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 04:28:29,642 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2024-11-14 04:28:29,642 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1150808594] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 04:28:29,642 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1052697571] [2024-11-14 04:28:29,645 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2024-11-14 04:28:29,647 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 04:28:29,648 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 04:28:29,648 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 04:28:29,648 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 04:28:29,983 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 04:28:30,493 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '644#(and (not (= (select (select |#memory_int| |ULTIMATE.start_main_~#b~0#1.base|) 0) (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) 0))) (<= 1 |#StackHeapBarrier|) (= |ULTIMATE.start_main_~i~0#1| 0) (= |ULTIMATE.start_main_~#b~0#1.offset| 0) (not (= (select (select |#memory_int| |ULTIMATE.start_main_~#b~0#1.base|) 0) (* (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) 0) (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) 0)))) (<= 2 |ULTIMATE.start_main_~#b~0#1.base|) (<= 2 |ULTIMATE.start_main_~#a~0#1.base|) (= |ULTIMATE.start_main_~#a~0#1.offset| 0))' at error location [2024-11-14 04:28:30,493 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 04:28:30,493 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 04:28:30,493 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 12] total 25 [2024-11-14 04:28:30,494 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1445572964] [2024-11-14 04:28:30,494 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 04:28:30,494 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2024-11-14 04:28:30,494 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 04:28:30,496 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2024-11-14 04:28:30,497 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=382, Invalid=430, Unknown=0, NotChecked=0, Total=812 [2024-11-14 04:28:30,497 INFO L87 Difference]: Start difference. First operand 28 states and 30 transitions. Second operand has 25 states, 25 states have (on average 1.72) internal successors, (43), 25 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) [2024-11-14 04:28:30,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:28:30,981 INFO L93 Difference]: Finished difference Result 174 states and 201 transitions. [2024-11-14 04:28:30,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2024-11-14 04:28:30,982 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.72) internal successors, (43), 25 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 [2024-11-14 04:28:30,982 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:28:30,984 INFO L225 Difference]: With dead ends: 174 [2024-11-14 04:28:30,987 INFO L226 Difference]: Without dead ends: 158 [2024-11-14 04:28:30,988 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 51 SyntacticMatches, 11 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 582 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=382, Invalid=430, Unknown=0, NotChecked=0, Total=812 [2024-11-14 04:28:30,989 INFO L432 NwaCegarLoop]: 3 mSDtfsCounter, 228 mSDsluCounter, 63 mSDsCounter, 0 mSdLazyCounter, 94 mSolverCounterSat, 91 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 228 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 185 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 91 IncrementalHoareTripleChecker+Valid, 94 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-14 04:28:30,989 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [228 Valid, 66 Invalid, 185 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [91 Valid, 94 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-11-14 04:28:30,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2024-11-14 04:28:31,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 52. [2024-11-14 04:28:31,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 51 states have (on average 1.0588235294117647) internal successors, (54), 51 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:28:31,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 54 transitions. [2024-11-14 04:28:31,006 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 54 transitions. Word has length 26 [2024-11-14 04:28:31,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:28:31,006 INFO L471 AbstractCegarLoop]: Abstraction has 52 states and 54 transitions. [2024-11-14 04:28:31,006 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.72) internal successors, (43), 25 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) [2024-11-14 04:28:31,007 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 54 transitions. [2024-11-14 04:28:31,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2024-11-14 04:28:31,008 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:28:31,008 INFO L215 NwaCegarLoop]: trace histogram [22, 22, 1, 1, 1, 1, 1, 1] [2024-11-14 04:28:31,033 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9312754-6eab-4268-80e0-e5fdd76fed27/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-11-14 04:28:31,208 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9312754-6eab-4268-80e0-e5fdd76fed27/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:28:31,209 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 04:28:31,213 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:28:31,214 INFO L85 PathProgramCache]: Analyzing trace with hash 846818615, now seen corresponding path program 4 times [2024-11-14 04:28:31,214 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:28:31,214 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [509335863] [2024-11-14 04:28:31,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:28:31,214 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:28:31,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:28:32,830 INFO L134 CoverageAnalysis]: Checked inductivity of 506 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 253 trivial. 0 not checked. [2024-11-14 04:28:32,830 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:28:32,831 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [509335863] [2024-11-14 04:28:32,831 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [509335863] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 04:28:32,831 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1819356395] [2024-11-14 04:28:32,831 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-14 04:28:32,831 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:28:32,831 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9312754-6eab-4268-80e0-e5fdd76fed27/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 04:28:32,834 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9312754-6eab-4268-80e0-e5fdd76fed27/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 04:28:32,836 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9312754-6eab-4268-80e0-e5fdd76fed27/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-14 04:28:33,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:28:33,134 INFO L255 TraceCheckSpWp]: Trace formula consists of 539 conjuncts, 24 conjuncts are in the unsatisfiable core [2024-11-14 04:28:33,138 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 04:28:33,229 INFO L134 CoverageAnalysis]: Checked inductivity of 506 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 253 trivial. 0 not checked. [2024-11-14 04:28:33,230 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 04:28:34,419 INFO L134 CoverageAnalysis]: Checked inductivity of 506 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 253 trivial. 0 not checked. [2024-11-14 04:28:34,419 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1819356395] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 04:28:34,419 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1165242866] [2024-11-14 04:28:34,422 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2024-11-14 04:28:34,422 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 04:28:34,422 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 04:28:34,422 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 04:28:34,422 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 04:28:36,659 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 04:28:36,796 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1345#(and (= |ULTIMATE.start_main_~i~0#1| 0) (not (= (select (select |#memory_int| |ULTIMATE.start_main_~#b~0#1.base|) |ULTIMATE.start_main_~#b~0#1.offset|) (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) |ULTIMATE.start_main_~#a~0#1.offset|))) (not (= (* (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) |ULTIMATE.start_main_~#a~0#1.offset|) (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) |ULTIMATE.start_main_~#a~0#1.offset|)) (select (select |#memory_int| |ULTIMATE.start_main_~#b~0#1.base|) |ULTIMATE.start_main_~#b~0#1.offset|))))' at error location [2024-11-14 04:28:36,796 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 04:28:36,796 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 04:28:36,796 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 24, 24] total 49 [2024-11-14 04:28:36,796 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2003688031] [2024-11-14 04:28:36,797 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 04:28:36,797 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2024-11-14 04:28:36,797 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 04:28:36,799 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2024-11-14 04:28:36,801 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1276, Invalid=1376, Unknown=0, NotChecked=0, Total=2652 [2024-11-14 04:28:36,801 INFO L87 Difference]: Start difference. First operand 52 states and 54 transitions. Second operand has 49 states, 49 states have (on average 1.6122448979591837) internal successors, (79), 49 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:28:38,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:28:38,010 INFO L93 Difference]: Finished difference Result 354 states and 405 transitions. [2024-11-14 04:28:38,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2024-11-14 04:28:38,011 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 1.6122448979591837) internal successors, (79), 49 states have internal predecessors, (79), 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 50 [2024-11-14 04:28:38,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:28:38,014 INFO L225 Difference]: With dead ends: 354 [2024-11-14 04:28:38,014 INFO L226 Difference]: Without dead ends: 326 [2024-11-14 04:28:38,016 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 123 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 342 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=1276, Invalid=1376, Unknown=0, NotChecked=0, Total=2652 [2024-11-14 04:28:38,017 INFO L432 NwaCegarLoop]: 3 mSDtfsCounter, 748 mSDsluCounter, 135 mSDsCounter, 0 mSdLazyCounter, 190 mSolverCounterSat, 284 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 748 SdHoareTripleChecker+Valid, 138 SdHoareTripleChecker+Invalid, 474 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 284 IncrementalHoareTripleChecker+Valid, 190 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2024-11-14 04:28:38,018 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [748 Valid, 138 Invalid, 474 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [284 Valid, 190 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2024-11-14 04:28:38,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 326 states. [2024-11-14 04:28:38,032 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 326 to 100. [2024-11-14 04:28:38,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 99 states have (on average 1.0303030303030303) internal successors, (102), 99 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:28:38,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 102 transitions. [2024-11-14 04:28:38,035 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 102 transitions. Word has length 50 [2024-11-14 04:28:38,035 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:28:38,035 INFO L471 AbstractCegarLoop]: Abstraction has 100 states and 102 transitions. [2024-11-14 04:28:38,035 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 1.6122448979591837) internal successors, (79), 49 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:28:38,036 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 102 transitions. [2024-11-14 04:28:38,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2024-11-14 04:28:38,038 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:28:38,038 INFO L215 NwaCegarLoop]: trace histogram [46, 46, 1, 1, 1, 1, 1, 1] [2024-11-14 04:28:38,064 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9312754-6eab-4268-80e0-e5fdd76fed27/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-11-14 04:28:38,242 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9312754-6eab-4268-80e0-e5fdd76fed27/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:28:38,242 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 04:28:38,243 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:28:38,243 INFO L85 PathProgramCache]: Analyzing trace with hash 892768439, now seen corresponding path program 5 times [2024-11-14 04:28:38,243 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:28:38,243 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2021443183] [2024-11-14 04:28:38,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:28:38,243 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:28:38,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:28:42,832 INFO L134 CoverageAnalysis]: Checked inductivity of 2162 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 1081 trivial. 0 not checked. [2024-11-14 04:28:42,833 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:28:42,833 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2021443183] [2024-11-14 04:28:42,833 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2021443183] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 04:28:42,833 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1406761409] [2024-11-14 04:28:42,833 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-14 04:28:42,833 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:28:42,834 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9312754-6eab-4268-80e0-e5fdd76fed27/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 04:28:42,836 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9312754-6eab-4268-80e0-e5fdd76fed27/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 04:28:42,837 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9312754-6eab-4268-80e0-e5fdd76fed27/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process