./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-patterns/array12_pattern.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_37a032b6-c652-49ee-8ba5-bb4349b2325f/bin/utaipan-verify-sOmjnqqW8E/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37a032b6-c652-49ee-8ba5-bb4349b2325f/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_37a032b6-c652-49ee-8ba5-bb4349b2325f/bin/utaipan-verify-sOmjnqqW8E/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37a032b6-c652-49ee-8ba5-bb4349b2325f/bin/utaipan-verify-sOmjnqqW8E/config/TaipanReach.xml -i ../../sv-benchmarks/c/array-patterns/array12_pattern.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37a032b6-c652-49ee-8ba5-bb4349b2325f/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_37a032b6-c652-49ee-8ba5-bb4349b2325f/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 4cd544b9fc2c4c641198812054f6f7e3a4b46d14448acc5758393bf17818405b --- Real Ultimate output --- This is Ultimate 0.3.0-dev-826ab2b [2024-11-14 04:59:12,280 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-14 04:59:12,376 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37a032b6-c652-49ee-8ba5-bb4349b2325f/bin/utaipan-verify-sOmjnqqW8E/config/svcomp-Reach-32bit-Taipan_Default.epf [2024-11-14 04:59:12,388 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-14 04:59:12,388 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-14 04:59:12,431 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-14 04:59:12,432 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-14 04:59:12,432 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-14 04:59:12,432 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-14 04:59:12,433 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-14 04:59:12,433 INFO L153 SettingsManager]: * User list type=DISABLED [2024-11-14 04:59:12,433 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2024-11-14 04:59:12,433 INFO L153 SettingsManager]: * Explicit value domain=true [2024-11-14 04:59:12,433 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2024-11-14 04:59:12,433 INFO L153 SettingsManager]: * Octagon Domain=false [2024-11-14 04:59:12,434 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2024-11-14 04:59:12,434 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2024-11-14 04:59:12,434 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2024-11-14 04:59:12,434 INFO L153 SettingsManager]: * Interval Domain=false [2024-11-14 04:59:12,434 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2024-11-14 04:59:12,435 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2024-11-14 04:59:12,435 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2024-11-14 04:59:12,435 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-14 04:59:12,435 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-14 04:59:12,436 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-14 04:59:12,436 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-14 04:59:12,436 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-14 04:59:12,436 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-14 04:59:12,436 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-14 04:59:12,437 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-14 04:59:12,437 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-14 04:59:12,437 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-14 04:59:12,437 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-14 04:59:12,437 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-14 04:59:12,437 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-14 04:59:12,438 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-14 04:59:12,438 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-14 04:59:12,438 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-14 04:59:12,438 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2024-11-14 04:59:12,438 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-14 04:59:12,438 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-14 04:59:12,438 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-14 04:59:12,439 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2024-11-14 04:59:12,439 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-14 04:59:12,439 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-14 04:59:12,439 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2024-11-14 04:59:12,439 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-14 04:59:12,439 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_37a032b6-c652-49ee-8ba5-bb4349b2325f/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 -> 4cd544b9fc2c4c641198812054f6f7e3a4b46d14448acc5758393bf17818405b [2024-11-14 04:59:12,861 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-14 04:59:12,875 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-14 04:59:12,877 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-14 04:59:12,878 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-14 04:59:12,879 INFO L274 PluginConnector]: CDTParser initialized [2024-11-14 04:59:12,881 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37a032b6-c652-49ee-8ba5-bb4349b2325f/bin/utaipan-verify-sOmjnqqW8E/../../sv-benchmarks/c/array-patterns/array12_pattern.c Unable to find full path for "g++" [2024-11-14 04:59:14,964 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-14 04:59:15,264 INFO L384 CDTParser]: Found 1 translation units. [2024-11-14 04:59:15,268 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37a032b6-c652-49ee-8ba5-bb4349b2325f/sv-benchmarks/c/array-patterns/array12_pattern.c [2024-11-14 04:59:15,278 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37a032b6-c652-49ee-8ba5-bb4349b2325f/bin/utaipan-verify-sOmjnqqW8E/data/cbfd95a3e/1ff12963c1d14861921eb436df691e58/FLAG408628d6c [2024-11-14 04:59:15,295 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37a032b6-c652-49ee-8ba5-bb4349b2325f/bin/utaipan-verify-sOmjnqqW8E/data/cbfd95a3e/1ff12963c1d14861921eb436df691e58 [2024-11-14 04:59:15,297 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-14 04:59:15,299 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-14 04:59:15,301 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-14 04:59:15,302 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-14 04:59:15,309 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-14 04:59:15,311 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.11 04:59:15" (1/1) ... [2024-11-14 04:59:15,315 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2902c694 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 04:59:15, skipping insertion in model container [2024-11-14 04:59:15,315 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.11 04:59:15" (1/1) ... [2024-11-14 04:59:15,337 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-14 04:59:15,549 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_37a032b6-c652-49ee-8ba5-bb4349b2325f/sv-benchmarks/c/array-patterns/array12_pattern.c[1349,1362] [2024-11-14 04:59:15,586 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-14 04:59:15,598 INFO L200 MainTranslator]: Completed pre-run [2024-11-14 04:59:15,614 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_37a032b6-c652-49ee-8ba5-bb4349b2325f/sv-benchmarks/c/array-patterns/array12_pattern.c[1349,1362] [2024-11-14 04:59:15,636 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-14 04:59:15,664 INFO L204 MainTranslator]: Completed translation [2024-11-14 04:59:15,665 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 04:59:15 WrapperNode [2024-11-14 04:59:15,665 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-14 04:59:15,666 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-14 04:59:15,667 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-14 04:59:15,667 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-14 04:59:15,677 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 04:59:15" (1/1) ... [2024-11-14 04:59:15,685 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 04:59:15" (1/1) ... [2024-11-14 04:59:15,708 INFO L138 Inliner]: procedures = 16, calls = 18, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 87 [2024-11-14 04:59:15,709 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-14 04:59:15,709 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-14 04:59:15,709 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-14 04:59:15,710 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-14 04:59:15,718 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 04:59:15" (1/1) ... [2024-11-14 04:59:15,718 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 04:59:15" (1/1) ... [2024-11-14 04:59:15,720 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 04:59:15" (1/1) ... [2024-11-14 04:59:15,720 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 04:59:15" (1/1) ... [2024-11-14 04:59:15,726 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 04:59:15" (1/1) ... [2024-11-14 04:59:15,730 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 04:59:15" (1/1) ... [2024-11-14 04:59:15,731 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 04:59:15" (1/1) ... [2024-11-14 04:59:15,732 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 04:59:15" (1/1) ... [2024-11-14 04:59:15,734 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-14 04:59:15,734 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-14 04:59:15,735 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-14 04:59:15,735 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-14 04:59:15,736 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 04:59:15" (1/1) ... [2024-11-14 04:59:15,742 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2024-11-14 04:59:15,758 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37a032b6-c652-49ee-8ba5-bb4349b2325f/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 04:59:15,778 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37a032b6-c652-49ee-8ba5-bb4349b2325f/bin/utaipan-verify-sOmjnqqW8E/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2024-11-14 04:59:15,782 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37a032b6-c652-49ee-8ba5-bb4349b2325f/bin/utaipan-verify-sOmjnqqW8E/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2024-11-14 04:59:15,813 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-14 04:59:15,813 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2024-11-14 04:59:15,813 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2024-11-14 04:59:15,813 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2024-11-14 04:59:15,813 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-11-14 04:59:15,813 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2024-11-14 04:59:15,814 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-14 04:59:15,814 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-14 04:59:15,814 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2024-11-14 04:59:15,814 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-11-14 04:59:15,901 INFO L238 CfgBuilder]: Building ICFG [2024-11-14 04:59:15,904 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-14 04:59:16,090 INFO L? ?]: Removed 17 outVars from TransFormulas that were not future-live. [2024-11-14 04:59:16,091 INFO L287 CfgBuilder]: Performing block encoding [2024-11-14 04:59:16,148 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-14 04:59:16,148 INFO L316 CfgBuilder]: Removed 5 assume(true) statements. [2024-11-14 04:59:16,149 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.11 04:59:16 BoogieIcfgContainer [2024-11-14 04:59:16,149 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-14 04:59:16,154 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-14 04:59:16,154 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-14 04:59:16,164 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-14 04:59:16,164 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.11 04:59:15" (1/3) ... [2024-11-14 04:59:16,165 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@f463b5c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.11 04:59:16, skipping insertion in model container [2024-11-14 04:59:16,165 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 04:59:15" (2/3) ... [2024-11-14 04:59:16,165 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@f463b5c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.11 04:59:16, skipping insertion in model container [2024-11-14 04:59:16,165 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.11 04:59:16" (3/3) ... [2024-11-14 04:59:16,168 INFO L112 eAbstractionObserver]: Analyzing ICFG array12_pattern.c [2024-11-14 04:59:16,189 INFO L217 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-14 04:59:16,192 INFO L154 ceAbstractionStarter]: Applying trace abstraction to ICFG array12_pattern.c that has 2 procedures, 20 locations, 1 initial locations, 5 loop locations, and 1 error locations. [2024-11-14 04:59:16,272 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-14 04:59:16,293 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;@ec66fe4, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-14 04:59:16,293 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-11-14 04:59:16,302 INFO L276 IsEmpty]: Start isEmpty. Operand has 20 states, 14 states have (on average 1.5714285714285714) internal successors, (22), 15 states have internal predecessors, (22), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-14 04:59:16,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2024-11-14 04:59:16,310 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:59:16,311 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 04:59:16,312 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 04:59:16,317 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:59:16,318 INFO L85 PathProgramCache]: Analyzing trace with hash 228031008, now seen corresponding path program 1 times [2024-11-14 04:59:16,328 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:59:16,329 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1832739900] [2024-11-14 04:59:16,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:59:16,334 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:59:16,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:59:16,558 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 04:59:16,560 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:59:16,560 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1832739900] [2024-11-14 04:59:16,561 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1832739900] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 04:59:16,561 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-14 04:59:16,562 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-14 04:59:16,565 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1208210615] [2024-11-14 04:59:16,566 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 04:59:16,570 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-11-14 04:59:16,570 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 04:59:16,599 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-11-14 04:59:16,600 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-11-14 04:59:16,603 INFO L87 Difference]: Start difference. First operand has 20 states, 14 states have (on average 1.5714285714285714) internal successors, (22), 15 states have internal predecessors, (22), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 2 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-11-14 04:59:16,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:59:16,663 INFO L93 Difference]: Finished difference Result 28 states and 38 transitions. [2024-11-14 04:59:16,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-11-14 04:59:16,669 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2024-11-14 04:59:16,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:59:16,677 INFO L225 Difference]: With dead ends: 28 [2024-11-14 04:59:16,678 INFO L226 Difference]: Without dead ends: 18 [2024-11-14 04:59:16,682 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-11-14 04:59:16,688 INFO L432 NwaCegarLoop]: 19 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-14 04:59:16,689 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 19 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-14 04:59:16,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2024-11-14 04:59:16,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2024-11-14 04:59:16,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 13 states have (on average 1.3846153846153846) internal successors, (18), 13 states have internal predecessors, (18), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-14 04:59:16,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 24 transitions. [2024-11-14 04:59:16,736 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 24 transitions. Word has length 11 [2024-11-14 04:59:16,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:59:16,739 INFO L471 AbstractCegarLoop]: Abstraction has 18 states and 24 transitions. [2024-11-14 04:59:16,740 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-11-14 04:59:16,740 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 24 transitions. [2024-11-14 04:59:16,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2024-11-14 04:59:16,743 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:59:16,743 INFO L215 NwaCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 04:59:16,743 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-14 04:59:16,744 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 04:59:16,744 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:59:16,744 INFO L85 PathProgramCache]: Analyzing trace with hash -1453757154, now seen corresponding path program 1 times [2024-11-14 04:59:16,745 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:59:16,746 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [290930631] [2024-11-14 04:59:16,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:59:16,746 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:59:16,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:59:17,375 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-14 04:59:17,376 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:59:17,376 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [290930631] [2024-11-14 04:59:17,376 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [290930631] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 04:59:17,376 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [575842529] [2024-11-14 04:59:17,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:59:17,376 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:59:17,377 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37a032b6-c652-49ee-8ba5-bb4349b2325f/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 04:59:17,379 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37a032b6-c652-49ee-8ba5-bb4349b2325f/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 04:59:17,386 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37a032b6-c652-49ee-8ba5-bb4349b2325f/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-14 04:59:17,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:59:17,484 INFO L255 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-11-14 04:59:17,493 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 04:59:17,580 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-14 04:59:17,580 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-14 04:59:17,581 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [575842529] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 04:59:17,581 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-14 04:59:17,581 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 7 [2024-11-14 04:59:17,582 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [95272359] [2024-11-14 04:59:17,582 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 04:59:17,582 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-14 04:59:17,583 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 04:59:17,584 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-14 04:59:17,584 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-11-14 04:59:17,585 INFO L87 Difference]: Start difference. First operand 18 states and 24 transitions. Second operand has 5 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2024-11-14 04:59:17,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:59:17,745 INFO L93 Difference]: Finished difference Result 37 states and 49 transitions. [2024-11-14 04:59:17,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-14 04:59:17,748 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 19 [2024-11-14 04:59:17,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:59:17,748 INFO L225 Difference]: With dead ends: 37 [2024-11-14 04:59:17,749 INFO L226 Difference]: Without dead ends: 24 [2024-11-14 04:59:17,749 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-11-14 04:59:17,750 INFO L432 NwaCegarLoop]: 9 mSDtfsCounter, 23 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 20 SdHoareTripleChecker+Invalid, 56 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-14 04:59:17,750 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 20 Invalid, 56 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-14 04:59:17,753 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2024-11-14 04:59:17,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 22. [2024-11-14 04:59:17,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 16 states have (on average 1.3125) internal successors, (21), 16 states have internal predecessors, (21), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-14 04:59:17,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 27 transitions. [2024-11-14 04:59:17,763 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 27 transitions. Word has length 19 [2024-11-14 04:59:17,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:59:17,764 INFO L471 AbstractCegarLoop]: Abstraction has 22 states and 27 transitions. [2024-11-14 04:59:17,765 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2024-11-14 04:59:17,765 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 27 transitions. [2024-11-14 04:59:17,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2024-11-14 04:59:17,766 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:59:17,767 INFO L215 NwaCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 04:59:17,791 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37a032b6-c652-49ee-8ba5-bb4349b2325f/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-14 04:59:17,970 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37a032b6-c652-49ee-8ba5-bb4349b2325f/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:59:17,971 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 04:59:17,971 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:59:17,971 INFO L85 PathProgramCache]: Analyzing trace with hash -2117115486, now seen corresponding path program 1 times [2024-11-14 04:59:17,971 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:59:17,972 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [102198144] [2024-11-14 04:59:17,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:59:17,972 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:59:18,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:59:18,123 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-11-14 04:59:18,123 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:59:18,123 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [102198144] [2024-11-14 04:59:18,123 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [102198144] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 04:59:18,124 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-14 04:59:18,124 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-14 04:59:18,124 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1986586075] [2024-11-14 04:59:18,124 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 04:59:18,124 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-14 04:59:18,124 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 04:59:18,125 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-14 04:59:18,125 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-14 04:59:18,125 INFO L87 Difference]: Start difference. First operand 22 states and 27 transitions. Second operand has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2024-11-14 04:59:18,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:59:18,201 INFO L93 Difference]: Finished difference Result 42 states and 56 transitions. [2024-11-14 04:59:18,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-14 04:59:18,202 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 23 [2024-11-14 04:59:18,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:59:18,203 INFO L225 Difference]: With dead ends: 42 [2024-11-14 04:59:18,203 INFO L226 Difference]: Without dead ends: 26 [2024-11-14 04:59:18,203 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-14 04:59:18,204 INFO L432 NwaCegarLoop]: 14 mSDtfsCounter, 4 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-14 04:59:18,207 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 34 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-14 04:59:18,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2024-11-14 04:59:18,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 24. [2024-11-14 04:59:18,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 18 states have (on average 1.2777777777777777) internal successors, (23), 18 states have internal predecessors, (23), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-14 04:59:18,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 29 transitions. [2024-11-14 04:59:18,216 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 29 transitions. Word has length 23 [2024-11-14 04:59:18,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:59:18,216 INFO L471 AbstractCegarLoop]: Abstraction has 24 states and 29 transitions. [2024-11-14 04:59:18,216 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2024-11-14 04:59:18,216 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 29 transitions. [2024-11-14 04:59:18,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2024-11-14 04:59:18,217 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:59:18,217 INFO L215 NwaCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 04:59:18,217 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-11-14 04:59:18,217 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 04:59:18,218 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:59:18,218 INFO L85 PathProgramCache]: Analyzing trace with hash -252552210, now seen corresponding path program 1 times [2024-11-14 04:59:18,220 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:59:18,220 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [58652970] [2024-11-14 04:59:18,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:59:18,220 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:59:18,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-14 04:59:18,294 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [717204208] [2024-11-14 04:59:18,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:59:18,294 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:59:18,294 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37a032b6-c652-49ee-8ba5-bb4349b2325f/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 04:59:18,300 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37a032b6-c652-49ee-8ba5-bb4349b2325f/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 04:59:18,302 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37a032b6-c652-49ee-8ba5-bb4349b2325f/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-14 04:59:18,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:59:18,425 INFO L255 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 34 conjuncts are in the unsatisfiable core [2024-11-14 04:59:18,435 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 04:59:18,657 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-14 04:59:19,717 INFO L349 Elim1Store]: treesize reduction 156, result has 26.4 percent of original size [2024-11-14 04:59:19,719 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 4 case distinctions, treesize of input 45 treesize of output 77 [2024-11-14 04:59:22,816 INFO L349 Elim1Store]: treesize reduction 36, result has 71.0 percent of original size [2024-11-14 04:59:22,816 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 142 treesize of output 170 [2024-11-14 04:59:34,001 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-14 04:59:34,001 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 04:59:35,001 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:59:35,002 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [58652970] [2024-11-14 04:59:35,002 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-14 04:59:35,002 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [717204208] [2024-11-14 04:59:35,003 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [717204208] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 04:59:35,003 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1088639687] [2024-11-14 04:59:35,022 INFO L159 IcfgInterpreter]: Started Sifa with 18 locations of interest [2024-11-14 04:59:35,022 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 04:59:35,025 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 04:59:35,030 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 04:59:35,030 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 04:59:36,793 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 1 for LOIs [2024-11-14 04:59:36,794 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 04:59:40,617 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '368#true' at error location [2024-11-14 04:59:40,617 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 04:59:40,617 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-11-14 04:59:40,617 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2024-11-14 04:59:40,617 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1749326411] [2024-11-14 04:59:40,617 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-11-14 04:59:40,617 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-11-14 04:59:40,618 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 04:59:40,618 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-11-14 04:59:40,619 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=912, Unknown=8, NotChecked=0, Total=1056 [2024-11-14 04:59:40,620 INFO L87 Difference]: Start difference. First operand 24 states and 29 transitions. Second operand has 15 states, 13 states have (on average 1.3846153846153846) internal successors, (18), 11 states have internal predecessors, (18), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-14 04:59:41,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:59:41,793 INFO L93 Difference]: Finished difference Result 44 states and 55 transitions. [2024-11-14 04:59:41,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-11-14 04:59:41,794 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 13 states have (on average 1.3846153846153846) internal successors, (18), 11 states have internal predecessors, (18), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 25 [2024-11-14 04:59:41,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:59:41,795 INFO L225 Difference]: With dead ends: 44 [2024-11-14 04:59:41,795 INFO L226 Difference]: Without dead ends: 41 [2024-11-14 04:59:41,796 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 380 ImplicationChecksByTransitivity, 6.3s TimeCoverageRelationStatistics Valid=150, Invalid=1032, Unknown=8, NotChecked=0, Total=1190 [2024-11-14 04:59:41,798 INFO L432 NwaCegarLoop]: 12 mSDtfsCounter, 30 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 206 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 212 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 206 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2024-11-14 04:59:41,799 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [32 Valid, 50 Invalid, 212 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 206 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2024-11-14 04:59:41,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2024-11-14 04:59:41,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 36. [2024-11-14 04:59:41,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 27 states have (on average 1.2592592592592593) internal successors, (34), 27 states have internal predecessors, (34), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2024-11-14 04:59:41,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 44 transitions. [2024-11-14 04:59:41,818 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 44 transitions. Word has length 25 [2024-11-14 04:59:41,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:59:41,818 INFO L471 AbstractCegarLoop]: Abstraction has 36 states and 44 transitions. [2024-11-14 04:59:41,818 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 13 states have (on average 1.3846153846153846) internal successors, (18), 11 states have internal predecessors, (18), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-14 04:59:41,819 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 44 transitions. [2024-11-14 04:59:41,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2024-11-14 04:59:41,819 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:59:41,819 INFO L215 NwaCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 04:59:41,840 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37a032b6-c652-49ee-8ba5-bb4349b2325f/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-11-14 04:59:42,023 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37a032b6-c652-49ee-8ba5-bb4349b2325f/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:59:42,024 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 04:59:42,024 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:59:42,024 INFO L85 PathProgramCache]: Analyzing trace with hash 717387544, now seen corresponding path program 2 times [2024-11-14 04:59:42,024 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:59:42,024 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1835554131] [2024-11-14 04:59:42,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:59:42,025 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:59:42,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:59:42,226 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-14 04:59:42,226 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:59:42,226 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1835554131] [2024-11-14 04:59:42,226 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1835554131] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 04:59:42,226 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [906229793] [2024-11-14 04:59:42,227 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-14 04:59:42,227 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:59:42,227 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37a032b6-c652-49ee-8ba5-bb4349b2325f/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 04:59:42,229 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37a032b6-c652-49ee-8ba5-bb4349b2325f/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 04:59:42,232 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37a032b6-c652-49ee-8ba5-bb4349b2325f/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-14 04:59:42,318 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-11-14 04:59:42,318 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 04:59:42,322 INFO L255 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-14 04:59:42,324 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 04:59:42,416 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-14 04:59:42,416 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 04:59:42,512 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-14 04:59:42,512 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [906229793] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 04:59:42,513 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1109469974] [2024-11-14 04:59:42,515 INFO L159 IcfgInterpreter]: Started Sifa with 18 locations of interest [2024-11-14 04:59:42,516 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 04:59:42,516 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 04:59:42,516 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 04:59:42,516 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 04:59:44,113 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 1 for LOIs [2024-11-14 04:59:44,114 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 04:59:45,771 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '641#true' at error location [2024-11-14 04:59:45,771 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 04:59:45,771 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 04:59:45,771 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 16 [2024-11-14 04:59:45,771 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2030156000] [2024-11-14 04:59:45,771 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 04:59:45,772 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-11-14 04:59:45,772 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 04:59:45,772 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-11-14 04:59:45,773 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=668, Unknown=7, NotChecked=0, Total=756 [2024-11-14 04:59:45,773 INFO L87 Difference]: Start difference. First operand 36 states and 44 transitions. Second operand has 16 states, 16 states have (on average 2.25) internal successors, (36), 16 states have internal predecessors, (36), 2 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2024-11-14 04:59:46,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:59:46,352 INFO L93 Difference]: Finished difference Result 119 states and 168 transitions. [2024-11-14 04:59:46,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2024-11-14 04:59:46,357 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.25) internal successors, (36), 16 states have internal predecessors, (36), 2 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 26 [2024-11-14 04:59:46,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:59:46,358 INFO L225 Difference]: With dead ends: 119 [2024-11-14 04:59:46,358 INFO L226 Difference]: Without dead ends: 90 [2024-11-14 04:59:46,359 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 68 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 378 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=185, Invalid=1368, Unknown=7, NotChecked=0, Total=1560 [2024-11-14 04:59:46,360 INFO L432 NwaCegarLoop]: 11 mSDtfsCounter, 30 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 326 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 78 SdHoareTripleChecker+Invalid, 380 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 326 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-14 04:59:46,361 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [30 Valid, 78 Invalid, 380 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 326 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-14 04:59:46,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2024-11-14 04:59:46,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 84. [2024-11-14 04:59:46,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 69 states have (on average 1.3768115942028984) internal successors, (95), 69 states have internal predecessors, (95), 9 states have call successors, (9), 5 states have call predecessors, (9), 5 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2024-11-14 04:59:46,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 113 transitions. [2024-11-14 04:59:46,396 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 113 transitions. Word has length 26 [2024-11-14 04:59:46,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:59:46,396 INFO L471 AbstractCegarLoop]: Abstraction has 84 states and 113 transitions. [2024-11-14 04:59:46,396 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.25) internal successors, (36), 16 states have internal predecessors, (36), 2 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2024-11-14 04:59:46,396 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 113 transitions. [2024-11-14 04:59:46,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2024-11-14 04:59:46,398 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:59:46,398 INFO L215 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 04:59:46,411 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37a032b6-c652-49ee-8ba5-bb4349b2325f/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-11-14 04:59:46,598 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37a032b6-c652-49ee-8ba5-bb4349b2325f/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:59:46,599 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 04:59:46,599 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:59:46,599 INFO L85 PathProgramCache]: Analyzing trace with hash -641083953, now seen corresponding path program 3 times [2024-11-14 04:59:46,599 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:59:46,599 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [728413123] [2024-11-14 04:59:46,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:59:46,599 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:59:46,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:59:46,730 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 7 proven. 2 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-14 04:59:46,730 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:59:46,730 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [728413123] [2024-11-14 04:59:46,730 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [728413123] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 04:59:46,730 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1584013380] [2024-11-14 04:59:46,730 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-14 04:59:46,731 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:59:46,731 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37a032b6-c652-49ee-8ba5-bb4349b2325f/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 04:59:46,733 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37a032b6-c652-49ee-8ba5-bb4349b2325f/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 04:59:46,736 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37a032b6-c652-49ee-8ba5-bb4349b2325f/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-14 04:59:46,798 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-14 04:59:46,798 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 04:59:46,799 INFO L255 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-14 04:59:46,801 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 04:59:46,868 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 12 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-14 04:59:46,869 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 04:59:46,936 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 8 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-14 04:59:46,936 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1584013380] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 04:59:46,937 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [152760070] [2024-11-14 04:59:46,939 INFO L159 IcfgInterpreter]: Started Sifa with 18 locations of interest [2024-11-14 04:59:46,939 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 04:59:46,939 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 04:59:46,940 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 04:59:46,940 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 04:59:48,201 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 1 for LOIs [2024-11-14 04:59:48,204 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 04:59:49,519 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1215#true' at error location [2024-11-14 04:59:49,520 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 04:59:49,520 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 04:59:49,520 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 11 [2024-11-14 04:59:49,520 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [538689914] [2024-11-14 04:59:49,521 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 04:59:49,521 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-14 04:59:49,521 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 04:59:49,522 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-14 04:59:49,522 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=432, Unknown=7, NotChecked=0, Total=506 [2024-11-14 04:59:49,522 INFO L87 Difference]: Start difference. First operand 84 states and 113 transitions. Second operand has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 11 states have internal predecessors, (32), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2024-11-14 04:59:49,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:59:49,707 INFO L93 Difference]: Finished difference Result 98 states and 129 transitions. [2024-11-14 04:59:49,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-11-14 04:59:49,708 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 11 states have internal predecessors, (32), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 28 [2024-11-14 04:59:49,708 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:59:49,709 INFO L225 Difference]: With dead ends: 98 [2024-11-14 04:59:49,709 INFO L226 Difference]: Without dead ends: 85 [2024-11-14 04:59:49,709 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 65 SyntacticMatches, 3 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 182 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=98, Invalid=597, Unknown=7, NotChecked=0, Total=702 [2024-11-14 04:59:49,710 INFO L432 NwaCegarLoop]: 12 mSDtfsCounter, 8 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 86 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 93 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 86 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-14 04:59:49,710 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 36 Invalid, 93 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 86 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-14 04:59:49,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2024-11-14 04:59:49,751 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 82. [2024-11-14 04:59:49,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 67 states have (on average 1.373134328358209) internal successors, (92), 67 states have internal predecessors, (92), 9 states have call successors, (9), 5 states have call predecessors, (9), 5 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2024-11-14 04:59:49,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 110 transitions. [2024-11-14 04:59:49,754 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 110 transitions. Word has length 28 [2024-11-14 04:59:49,755 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:59:49,755 INFO L471 AbstractCegarLoop]: Abstraction has 82 states and 110 transitions. [2024-11-14 04:59:49,755 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 11 states have internal predecessors, (32), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2024-11-14 04:59:49,755 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 110 transitions. [2024-11-14 04:59:49,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2024-11-14 04:59:49,756 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:59:49,756 INFO L215 NwaCegarLoop]: trace histogram [5, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 04:59:49,775 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37a032b6-c652-49ee-8ba5-bb4349b2325f/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-11-14 04:59:49,956 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37a032b6-c652-49ee-8ba5-bb4349b2325f/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2024-11-14 04:59:49,957 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 04:59:49,957 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:59:49,957 INFO L85 PathProgramCache]: Analyzing trace with hash 1562102655, now seen corresponding path program 1 times [2024-11-14 04:59:49,957 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:59:49,957 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [763755761] [2024-11-14 04:59:49,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:59:49,957 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:59:49,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-14 04:59:50,001 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [464484070] [2024-11-14 04:59:50,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:59:50,001 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:59:50,001 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37a032b6-c652-49ee-8ba5-bb4349b2325f/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 04:59:50,005 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37a032b6-c652-49ee-8ba5-bb4349b2325f/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 04:59:50,011 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37a032b6-c652-49ee-8ba5-bb4349b2325f/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-14 04:59:50,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:59:50,097 INFO L255 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 32 conjuncts are in the unsatisfiable core [2024-11-14 04:59:50,100 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 04:59:50,297 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-14 04:59:50,437 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 12 proven. 7 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-11-14 04:59:50,437 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 04:59:50,578 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 39 treesize of output 37 [2024-11-14 04:59:50,582 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 184 treesize of output 180 [2024-11-14 04:59:50,607 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 39 treesize of output 37 [2024-11-14 04:59:50,614 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 184 treesize of output 180 [2024-11-14 04:59:51,186 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:59:51,187 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [763755761] [2024-11-14 04:59:51,187 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-14 04:59:51,187 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [464484070] [2024-11-14 04:59:51,187 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [464484070] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 04:59:51,187 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [397621658] [2024-11-14 04:59:51,191 INFO L159 IcfgInterpreter]: Started Sifa with 18 locations of interest [2024-11-14 04:59:51,191 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 04:59:51,192 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 04:59:51,192 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 04:59:51,193 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 04:59:52,842 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 1 for LOIs [2024-11-14 04:59:52,843 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 04:59:54,515 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1744#(<= 1 ~ARR_SIZE~0)' at error location [2024-11-14 04:59:54,515 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 04:59:54,515 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-11-14 04:59:54,515 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2024-11-14 04:59:54,515 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [164681112] [2024-11-14 04:59:54,515 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-11-14 04:59:54,516 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-11-14 04:59:54,516 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 04:59:54,516 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-11-14 04:59:54,517 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=144, Invalid=1046, Unknown=0, NotChecked=0, Total=1190 [2024-11-14 04:59:54,517 INFO L87 Difference]: Start difference. First operand 82 states and 110 transitions. Second operand has 17 states, 14 states have (on average 1.5) internal successors, (21), 14 states have internal predecessors, (21), 3 states have call successors, (4), 2 states have call predecessors, (4), 3 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) [2024-11-14 04:59:55,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:59:55,104 INFO L93 Difference]: Finished difference Result 108 states and 140 transitions. [2024-11-14 04:59:55,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2024-11-14 04:59:55,104 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 14 states have (on average 1.5) internal successors, (21), 14 states have internal predecessors, (21), 3 states have call successors, (4), 2 states have call predecessors, (4), 3 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) Word has length 34 [2024-11-14 04:59:55,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:59:55,105 INFO L225 Difference]: With dead ends: 108 [2024-11-14 04:59:55,105 INFO L226 Difference]: Without dead ends: 60 [2024-11-14 04:59:55,107 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 40 SyntacticMatches, 4 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 618 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=279, Invalid=1883, Unknown=0, NotChecked=0, Total=2162 [2024-11-14 04:59:55,107 INFO L432 NwaCegarLoop]: 14 mSDtfsCounter, 30 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 313 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 86 SdHoareTripleChecker+Invalid, 322 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 313 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-14 04:59:55,108 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [32 Valid, 86 Invalid, 322 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 313 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-14 04:59:55,108 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2024-11-14 04:59:55,126 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2024-11-14 04:59:55,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 51 states have (on average 1.3725490196078431) internal successors, (70), 51 states have internal predecessors, (70), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2024-11-14 04:59:55,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 80 transitions. [2024-11-14 04:59:55,127 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 80 transitions. Word has length 34 [2024-11-14 04:59:55,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:59:55,128 INFO L471 AbstractCegarLoop]: Abstraction has 60 states and 80 transitions. [2024-11-14 04:59:55,128 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 14 states have (on average 1.5) internal successors, (21), 14 states have internal predecessors, (21), 3 states have call successors, (4), 2 states have call predecessors, (4), 3 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) [2024-11-14 04:59:55,128 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 80 transitions. [2024-11-14 04:59:55,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2024-11-14 04:59:55,129 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:59:55,129 INFO L215 NwaCegarLoop]: trace histogram [4, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 04:59:55,152 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37a032b6-c652-49ee-8ba5-bb4349b2325f/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2024-11-14 04:59:55,329 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37a032b6-c652-49ee-8ba5-bb4349b2325f/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:59:55,329 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 04:59:55,330 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:59:55,330 INFO L85 PathProgramCache]: Analyzing trace with hash -597732684, now seen corresponding path program 4 times [2024-11-14 04:59:55,330 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:59:55,330 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1823780610] [2024-11-14 04:59:55,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:59:55,330 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:59:55,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:59:55,499 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 8 proven. 10 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-11-14 04:59:55,499 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:59:55,500 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1823780610] [2024-11-14 04:59:55,500 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1823780610] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 04:59:55,500 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [942919919] [2024-11-14 04:59:55,500 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-14 04:59:55,501 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:59:55,501 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37a032b6-c652-49ee-8ba5-bb4349b2325f/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 04:59:55,503 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37a032b6-c652-49ee-8ba5-bb4349b2325f/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 04:59:55,507 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37a032b6-c652-49ee-8ba5-bb4349b2325f/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-14 04:59:55,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:59:55,583 INFO L255 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-14 04:59:55,585 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 04:59:55,657 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 13 proven. 9 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2024-11-14 04:59:55,658 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 04:59:55,737 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 9 proven. 9 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-11-14 04:59:55,737 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [942919919] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 04:59:55,737 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [515080895] [2024-11-14 04:59:55,739 INFO L159 IcfgInterpreter]: Started Sifa with 18 locations of interest [2024-11-14 04:59:55,739 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 04:59:55,740 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 04:59:55,740 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 04:59:55,740 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 04:59:56,859 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 1 for LOIs [2024-11-14 04:59:56,860 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 04:59:58,048 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2217#true' at error location [2024-11-14 04:59:58,048 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 04:59:58,049 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 04:59:58,049 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 11 [2024-11-14 04:59:58,049 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1682621590] [2024-11-14 04:59:58,049 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 04:59:58,049 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-14 04:59:58,049 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 04:59:58,050 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-14 04:59:58,050 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=428, Unknown=7, NotChecked=0, Total=506 [2024-11-14 04:59:58,050 INFO L87 Difference]: Start difference. First operand 60 states and 80 transitions. Second operand has 11 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 11 states have internal predecessors, (31), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2024-11-14 04:59:58,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:59:58,201 INFO L93 Difference]: Finished difference Result 63 states and 82 transitions. [2024-11-14 04:59:58,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-14 04:59:58,202 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 11 states have internal predecessors, (31), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 33 [2024-11-14 04:59:58,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:59:58,203 INFO L225 Difference]: With dead ends: 63 [2024-11-14 04:59:58,203 INFO L226 Difference]: Without dead ends: 55 [2024-11-14 04:59:58,203 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 79 SyntacticMatches, 4 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 185 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=84, Invalid=509, Unknown=7, NotChecked=0, Total=600 [2024-11-14 04:59:58,204 INFO L432 NwaCegarLoop]: 12 mSDtfsCounter, 7 mSDsluCounter, 49 mSDsCounter, 0 mSdLazyCounter, 135 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 61 SdHoareTripleChecker+Invalid, 142 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 135 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-14 04:59:58,204 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 61 Invalid, 142 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 135 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-14 04:59:58,205 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2024-11-14 04:59:58,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 44. [2024-11-14 04:59:58,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 38 states have (on average 1.2894736842105263) internal successors, (49), 38 states have internal predecessors, (49), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-14 04:59:58,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 55 transitions. [2024-11-14 04:59:58,229 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 55 transitions. Word has length 33 [2024-11-14 04:59:58,229 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:59:58,229 INFO L471 AbstractCegarLoop]: Abstraction has 44 states and 55 transitions. [2024-11-14 04:59:58,230 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 11 states have internal predecessors, (31), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2024-11-14 04:59:58,230 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 55 transitions. [2024-11-14 04:59:58,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2024-11-14 04:59:58,231 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:59:58,231 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 04:59:58,253 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37a032b6-c652-49ee-8ba5-bb4349b2325f/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-11-14 04:59:58,431 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37a032b6-c652-49ee-8ba5-bb4349b2325f/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:59:58,432 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 04:59:58,432 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:59:58,432 INFO L85 PathProgramCache]: Analyzing trace with hash 1621002022, now seen corresponding path program 5 times [2024-11-14 04:59:58,432 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:59:58,432 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [699166645] [2024-11-14 04:59:58,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:59:58,432 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:59:58,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-14 04:59:58,478 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1472309192] [2024-11-14 04:59:58,478 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-14 04:59:58,478 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:59:58,478 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37a032b6-c652-49ee-8ba5-bb4349b2325f/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 04:59:58,482 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37a032b6-c652-49ee-8ba5-bb4349b2325f/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 04:59:58,484 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37a032b6-c652-49ee-8ba5-bb4349b2325f/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-14 04:59:58,983 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2024-11-14 04:59:58,983 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 04:59:58,985 WARN L253 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 83 conjuncts are in the unsatisfiable core [2024-11-14 04:59:58,991 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 04:59:59,056 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-14 04:59:59,104 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2024-11-14 04:59:59,243 INFO L349 Elim1Store]: treesize reduction 32, result has 31.9 percent of original size [2024-11-14 04:59:59,243 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 28 treesize of output 30 [2024-11-14 04:59:59,317 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-14 04:59:59,318 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-14 04:59:59,319 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-14 04:59:59,321 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-14 04:59:59,323 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-14 04:59:59,323 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 44 [2024-11-14 04:59:59,891 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-14 04:59:59,893 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-14 04:59:59,894 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-14 04:59:59,896 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-14 05:00:00,594 INFO L349 Elim1Store]: treesize reduction 568, result has 22.2 percent of original size [2024-11-14 05:00:00,594 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 7 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 37 case distinctions, treesize of input 99 treesize of output 201 [2024-11-14 05:00:08,390 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-14 05:00:08,391 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-14 05:00:08,393 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-14 05:00:08,394 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-14 05:00:41,975 WARN L286 SmtUtils]: Spent 33.58s on a formula simplification. DAG size of input: 241 DAG size of output: 144 (called from [L 346] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.Elim1Store.elim1) [2024-11-14 05:00:41,976 INFO L349 Elim1Store]: treesize reduction 462, result has 44.8 percent of original size [2024-11-14 05:00:41,976 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 13 select indices, 13 select index equivalence classes, 6 disjoint index pairs (out of 78 index pairs), introduced 13 new quantified variables, introduced 78 case distinctions, treesize of input 376 treesize of output 532