./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/loops-crafted-1/mono-crafted_1.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_67869a4d-d229-4cb0-9819-bbb32311f7a0/bin/utaipan-verify-sOmjnqqW8E/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67869a4d-d229-4cb0-9819-bbb32311f7a0/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_67869a4d-d229-4cb0-9819-bbb32311f7a0/bin/utaipan-verify-sOmjnqqW8E/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67869a4d-d229-4cb0-9819-bbb32311f7a0/bin/utaipan-verify-sOmjnqqW8E/config/TaipanReach.xml -i ../../sv-benchmarks/c/loops-crafted-1/mono-crafted_1.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67869a4d-d229-4cb0-9819-bbb32311f7a0/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_67869a4d-d229-4cb0-9819-bbb32311f7a0/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 00e8f12f1d0e3d2fc679744754ceeef2daa37b874cd8db07b5ab8c35684165c0 --- Real Ultimate output --- This is Ultimate 0.3.0-dev-826ab2b [2024-11-14 04:19:52,344 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-14 04:19:52,421 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67869a4d-d229-4cb0-9819-bbb32311f7a0/bin/utaipan-verify-sOmjnqqW8E/config/svcomp-Reach-32bit-Taipan_Default.epf [2024-11-14 04:19:52,426 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-14 04:19:52,427 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-14 04:19:52,450 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-14 04:19:52,451 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-14 04:19:52,451 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-14 04:19:52,452 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-14 04:19:52,452 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-14 04:19:52,452 INFO L153 SettingsManager]: * User list type=DISABLED [2024-11-14 04:19:52,452 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2024-11-14 04:19:52,452 INFO L153 SettingsManager]: * Explicit value domain=true [2024-11-14 04:19:52,452 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2024-11-14 04:19:52,453 INFO L153 SettingsManager]: * Octagon Domain=false [2024-11-14 04:19:52,453 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2024-11-14 04:19:52,453 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2024-11-14 04:19:52,453 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2024-11-14 04:19:52,453 INFO L153 SettingsManager]: * Interval Domain=false [2024-11-14 04:19:52,453 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2024-11-14 04:19:52,454 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2024-11-14 04:19:52,454 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2024-11-14 04:19:52,454 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-14 04:19:52,454 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-14 04:19:52,454 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-14 04:19:52,454 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-14 04:19:52,455 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-14 04:19:52,455 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-14 04:19:52,455 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-14 04:19:52,455 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-14 04:19:52,455 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-14 04:19:52,455 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-14 04:19:52,455 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-14 04:19:52,455 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-14 04:19:52,455 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-14 04:19:52,455 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-14 04:19:52,456 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-14 04:19:52,456 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-14 04:19:52,456 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2024-11-14 04:19:52,456 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-14 04:19:52,457 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-14 04:19:52,457 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-14 04:19:52,457 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2024-11-14 04:19:52,457 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-14 04:19:52,457 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-14 04:19:52,457 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2024-11-14 04:19:52,457 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-14 04:19:52,457 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_67869a4d-d229-4cb0-9819-bbb32311f7a0/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 -> 00e8f12f1d0e3d2fc679744754ceeef2daa37b874cd8db07b5ab8c35684165c0 [2024-11-14 04:19:52,781 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-14 04:19:52,789 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-14 04:19:52,791 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-14 04:19:52,793 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-14 04:19:52,793 INFO L274 PluginConnector]: CDTParser initialized [2024-11-14 04:19:52,794 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67869a4d-d229-4cb0-9819-bbb32311f7a0/bin/utaipan-verify-sOmjnqqW8E/../../sv-benchmarks/c/loops-crafted-1/mono-crafted_1.c Unable to find full path for "g++" [2024-11-14 04:19:54,681 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-14 04:19:54,925 INFO L384 CDTParser]: Found 1 translation units. [2024-11-14 04:19:54,926 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67869a4d-d229-4cb0-9819-bbb32311f7a0/sv-benchmarks/c/loops-crafted-1/mono-crafted_1.c [2024-11-14 04:19:54,938 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67869a4d-d229-4cb0-9819-bbb32311f7a0/bin/utaipan-verify-sOmjnqqW8E/data/22b670eea/608f7e353c43400abf05b5c85dabe6fd/FLAGcfda59d2a [2024-11-14 04:19:55,239 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67869a4d-d229-4cb0-9819-bbb32311f7a0/bin/utaipan-verify-sOmjnqqW8E/data/22b670eea/608f7e353c43400abf05b5c85dabe6fd [2024-11-14 04:19:55,242 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-14 04:19:55,243 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-14 04:19:55,245 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-14 04:19:55,245 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-14 04:19:55,249 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-14 04:19:55,250 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.11 04:19:55" (1/1) ... [2024-11-14 04:19:55,251 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@40196565 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 04:19:55, skipping insertion in model container [2024-11-14 04:19:55,251 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.11 04:19:55" (1/1) ... [2024-11-14 04:19:55,265 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-14 04:19:55,431 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_67869a4d-d229-4cb0-9819-bbb32311f7a0/sv-benchmarks/c/loops-crafted-1/mono-crafted_1.c[318,331] [2024-11-14 04:19:55,448 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-14 04:19:55,459 INFO L200 MainTranslator]: Completed pre-run [2024-11-14 04:19:55,471 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_67869a4d-d229-4cb0-9819-bbb32311f7a0/sv-benchmarks/c/loops-crafted-1/mono-crafted_1.c[318,331] [2024-11-14 04:19:55,477 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-14 04:19:55,493 INFO L204 MainTranslator]: Completed translation [2024-11-14 04:19:55,494 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 04:19:55 WrapperNode [2024-11-14 04:19:55,494 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-14 04:19:55,495 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-14 04:19:55,495 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-14 04:19:55,495 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-14 04:19:55,501 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 04:19:55" (1/1) ... [2024-11-14 04:19:55,507 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 04:19:55" (1/1) ... [2024-11-14 04:19:55,524 INFO L138 Inliner]: procedures = 12, calls = 8, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 42 [2024-11-14 04:19:55,524 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-14 04:19:55,525 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-14 04:19:55,525 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-14 04:19:55,525 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-14 04:19:55,532 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 04:19:55" (1/1) ... [2024-11-14 04:19:55,532 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 04:19:55" (1/1) ... [2024-11-14 04:19:55,533 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 04:19:55" (1/1) ... [2024-11-14 04:19:55,533 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 04:19:55" (1/1) ... [2024-11-14 04:19:55,536 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 04:19:55" (1/1) ... [2024-11-14 04:19:55,540 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 04:19:55" (1/1) ... [2024-11-14 04:19:55,540 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 04:19:55" (1/1) ... [2024-11-14 04:19:55,541 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 04:19:55" (1/1) ... [2024-11-14 04:19:55,542 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-14 04:19:55,543 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-14 04:19:55,543 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-14 04:19:55,543 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-14 04:19:55,544 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 04:19:55" (1/1) ... [2024-11-14 04:19:55,551 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2024-11-14 04:19:55,571 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67869a4d-d229-4cb0-9819-bbb32311f7a0/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 04:19:55,589 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67869a4d-d229-4cb0-9819-bbb32311f7a0/bin/utaipan-verify-sOmjnqqW8E/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2024-11-14 04:19:55,593 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67869a4d-d229-4cb0-9819-bbb32311f7a0/bin/utaipan-verify-sOmjnqqW8E/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2024-11-14 04:19:55,615 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-14 04:19:55,615 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-14 04:19:55,615 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-14 04:19:55,615 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2024-11-14 04:19:55,684 INFO L238 CfgBuilder]: Building ICFG [2024-11-14 04:19:55,687 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-14 04:19:55,799 INFO L? ?]: Removed 9 outVars from TransFormulas that were not future-live. [2024-11-14 04:19:55,799 INFO L287 CfgBuilder]: Performing block encoding [2024-11-14 04:19:55,857 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-14 04:19:55,859 INFO L316 CfgBuilder]: Removed 2 assume(true) statements. [2024-11-14 04:19:55,859 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.11 04:19:55 BoogieIcfgContainer [2024-11-14 04:19:55,859 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-14 04:19:55,863 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-14 04:19:55,864 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-14 04:19:55,870 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-14 04:19:55,870 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.11 04:19:55" (1/3) ... [2024-11-14 04:19:55,872 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2daa974 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.11 04:19:55, skipping insertion in model container [2024-11-14 04:19:55,873 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 04:19:55" (2/3) ... [2024-11-14 04:19:55,873 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2daa974 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.11 04:19:55, skipping insertion in model container [2024-11-14 04:19:55,873 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.11 04:19:55" (3/3) ... [2024-11-14 04:19:55,875 INFO L112 eAbstractionObserver]: Analyzing ICFG mono-crafted_1.c [2024-11-14 04:19:55,896 INFO L217 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-14 04:19:55,900 INFO L154 ceAbstractionStarter]: Applying trace abstraction to ICFG mono-crafted_1.c that has 1 procedures, 8 locations, 1 initial locations, 2 loop locations, and 1 error locations. [2024-11-14 04:19:55,978 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-14 04:19:55,999 INFO L333 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopHeads, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@bd120d0, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-14 04:19:55,999 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-11-14 04:19:56,005 INFO L276 IsEmpty]: Start isEmpty. Operand has 8 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 7 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:19:56,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2024-11-14 04:19:56,012 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:19:56,012 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2024-11-14 04:19:56,013 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 04:19:56,020 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:19:56,021 INFO L85 PathProgramCache]: Analyzing trace with hash 71694541, now seen corresponding path program 1 times [2024-11-14 04:19:56,030 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:19:56,032 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2081470425] [2024-11-14 04:19:56,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:19:56,033 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:19:56,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:19:56,266 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 04:19:56,267 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:19:56,269 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2081470425] [2024-11-14 04:19:56,270 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2081470425] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 04:19:56,270 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-14 04:19:56,270 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-14 04:19:56,274 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1159216090] [2024-11-14 04:19:56,275 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 04:19:56,279 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-14 04:19:56,279 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 04:19:56,299 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-14 04:19:56,301 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-14 04:19:56,304 INFO L87 Difference]: Start difference. First operand has 8 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 7 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:19:56,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:19:56,352 INFO L93 Difference]: Finished difference Result 15 states and 19 transitions. [2024-11-14 04:19:56,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-14 04:19:56,356 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2024-11-14 04:19:56,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:19:56,364 INFO L225 Difference]: With dead ends: 15 [2024-11-14 04:19:56,364 INFO L226 Difference]: Without dead ends: 7 [2024-11-14 04:19:56,368 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-14 04:19:56,374 INFO L432 NwaCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 7 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-14 04:19:56,375 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 7 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-14 04:19:56,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7 states. [2024-11-14 04:19:56,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7 to 7. [2024-11-14 04:19:56,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 6 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:19:56,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 8 transitions. [2024-11-14 04:19:56,418 INFO L78 Accepts]: Start accepts. Automaton has 7 states and 8 transitions. Word has length 5 [2024-11-14 04:19:56,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:19:56,418 INFO L471 AbstractCegarLoop]: Abstraction has 7 states and 8 transitions. [2024-11-14 04:19:56,419 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:19:56,421 INFO L276 IsEmpty]: Start isEmpty. Operand 7 states and 8 transitions. [2024-11-14 04:19:56,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2024-11-14 04:19:56,422 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:19:56,422 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2024-11-14 04:19:56,422 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-14 04:19:56,423 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 04:19:56,423 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:19:56,424 INFO L85 PathProgramCache]: Analyzing trace with hash -2070545304, now seen corresponding path program 1 times [2024-11-14 04:19:56,424 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:19:56,424 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [928780117] [2024-11-14 04:19:56,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:19:56,424 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:19:56,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:19:56,688 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 04:19:56,690 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:19:56,690 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [928780117] [2024-11-14 04:19:56,690 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [928780117] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 04:19:56,691 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1303614633] [2024-11-14 04:19:56,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:19:56,691 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:19:56,691 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67869a4d-d229-4cb0-9819-bbb32311f7a0/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 04:19:56,694 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67869a4d-d229-4cb0-9819-bbb32311f7a0/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 04:19:56,695 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67869a4d-d229-4cb0-9819-bbb32311f7a0/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-14 04:19:56,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:19:56,752 INFO L255 TraceCheckSpWp]: Trace formula consists of 36 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-11-14 04:19:56,757 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 04:19:56,887 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 04:19:56,887 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 04:19:57,132 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 04:19:57,132 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1303614633] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-14 04:19:57,132 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-14 04:19:57,133 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3, 3] total 7 [2024-11-14 04:19:57,133 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2121311299] [2024-11-14 04:19:57,137 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 04:19:57,138 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-14 04:19:57,138 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 04:19:57,139 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-14 04:19:57,139 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=29, Unknown=0, NotChecked=0, Total=56 [2024-11-14 04:19:57,139 INFO L87 Difference]: Start difference. First operand 7 states and 8 transitions. Second operand has 4 states, 4 states have (on average 1.5) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:19:57,162 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:19:57,163 INFO L93 Difference]: Finished difference Result 11 states and 12 transitions. [2024-11-14 04:19:57,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-14 04:19:57,164 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.5) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2024-11-14 04:19:57,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:19:57,165 INFO L225 Difference]: With dead ends: 11 [2024-11-14 04:19:57,165 INFO L226 Difference]: Without dead ends: 8 [2024-11-14 04:19:57,165 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=29, Unknown=0, NotChecked=0, Total=56 [2024-11-14 04:19:57,166 INFO L432 NwaCegarLoop]: 2 mSDtfsCounter, 0 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-14 04:19:57,167 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 6 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-14 04:19:57,169 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8 states. [2024-11-14 04:19:57,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8 to 8. [2024-11-14 04:19:57,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8 states, 7 states have (on average 1.2857142857142858) internal successors, (9), 7 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:19:57,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 9 transitions. [2024-11-14 04:19:57,172 INFO L78 Accepts]: Start accepts. Automaton has 8 states and 9 transitions. Word has length 6 [2024-11-14 04:19:57,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:19:57,172 INFO L471 AbstractCegarLoop]: Abstraction has 8 states and 9 transitions. [2024-11-14 04:19:57,172 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.5) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:19:57,172 INFO L276 IsEmpty]: Start isEmpty. Operand 8 states and 9 transitions. [2024-11-14 04:19:57,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2024-11-14 04:19:57,173 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:19:57,173 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-11-14 04:19:57,193 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67869a4d-d229-4cb0-9819-bbb32311f7a0/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-14 04:19:57,373 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67869a4d-d229-4cb0-9819-bbb32311f7a0/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:19:57,374 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 04:19:57,374 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:19:57,374 INFO L85 PathProgramCache]: Analyzing trace with hash 236964002, now seen corresponding path program 1 times [2024-11-14 04:19:57,374 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:19:57,374 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1577898913] [2024-11-14 04:19:57,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:19:57,375 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:19:57,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:19:57,547 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-14 04:19:57,547 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:19:57,547 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1577898913] [2024-11-14 04:19:57,547 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1577898913] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 04:19:57,547 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [387862728] [2024-11-14 04:19:57,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:19:57,548 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:19:57,548 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67869a4d-d229-4cb0-9819-bbb32311f7a0/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 04:19:57,552 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67869a4d-d229-4cb0-9819-bbb32311f7a0/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 04:19:57,556 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67869a4d-d229-4cb0-9819-bbb32311f7a0/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-14 04:19:57,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:19:57,625 INFO L255 TraceCheckSpWp]: Trace formula consists of 41 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-14 04:19:57,627 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 04:19:57,720 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 04:19:57,721 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 04:19:57,925 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 04:19:57,925 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [387862728] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 04:19:57,925 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1919174002] [2024-11-14 04:19:57,945 INFO L159 IcfgInterpreter]: Started Sifa with 6 locations of interest [2024-11-14 04:19:57,946 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 04:19:57,949 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 04:19:57,954 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 04:19:57,955 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 04:19:58,229 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 04:19:58,279 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '156#(<= 1 |#StackHeapBarrier|)' at error location [2024-11-14 04:19:58,279 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 04:19:58,280 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 04:19:58,280 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 4, 4] total 9 [2024-11-14 04:19:58,280 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1767999846] [2024-11-14 04:19:58,280 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 04:19:58,280 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-11-14 04:19:58,281 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 04:19:58,281 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-11-14 04:19:58,281 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2024-11-14 04:19:58,282 INFO L87 Difference]: Start difference. First operand 8 states and 9 transitions. Second operand has 10 states, 10 states have (on average 1.7) internal successors, (17), 9 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:19:58,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:19:58,345 INFO L93 Difference]: Finished difference Result 17 states and 22 transitions. [2024-11-14 04:19:58,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-14 04:19:58,346 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.7) internal successors, (17), 9 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2024-11-14 04:19:58,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:19:58,347 INFO L225 Difference]: With dead ends: 17 [2024-11-14 04:19:58,347 INFO L226 Difference]: Without dead ends: 12 [2024-11-14 04:19:58,347 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=62, Invalid=148, Unknown=0, NotChecked=0, Total=210 [2024-11-14 04:19:58,348 INFO L432 NwaCegarLoop]: 2 mSDtfsCounter, 0 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-14 04:19:58,348 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 12 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-14 04:19:58,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2024-11-14 04:19:58,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2024-11-14 04:19:58,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12 states, 11 states have (on average 1.1818181818181819) internal successors, (13), 11 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:19:58,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 13 transitions. [2024-11-14 04:19:58,357 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 13 transitions. Word has length 7 [2024-11-14 04:19:58,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:19:58,357 INFO L471 AbstractCegarLoop]: Abstraction has 12 states and 13 transitions. [2024-11-14 04:19:58,357 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 1.7) internal successors, (17), 9 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:19:58,357 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 13 transitions. [2024-11-14 04:19:58,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2024-11-14 04:19:58,359 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:19:58,359 INFO L215 NwaCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1] [2024-11-14 04:19:58,379 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67869a4d-d229-4cb0-9819-bbb32311f7a0/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-11-14 04:19:58,565 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67869a4d-d229-4cb0-9819-bbb32311f7a0/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:19:58,565 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 04:19:58,565 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:19:58,565 INFO L85 PathProgramCache]: Analyzing trace with hash -679657427, now seen corresponding path program 2 times [2024-11-14 04:19:58,565 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:19:58,566 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1001785910] [2024-11-14 04:19:58,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:19:58,566 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:19:58,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:19:58,735 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-11-14 04:19:58,735 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:19:58,735 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1001785910] [2024-11-14 04:19:58,735 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1001785910] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 04:19:58,736 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1657569314] [2024-11-14 04:19:58,736 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-14 04:19:58,736 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:19:58,736 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67869a4d-d229-4cb0-9819-bbb32311f7a0/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 04:19:58,738 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67869a4d-d229-4cb0-9819-bbb32311f7a0/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 04:19:58,740 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67869a4d-d229-4cb0-9819-bbb32311f7a0/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-14 04:19:58,801 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-14 04:19:58,801 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 04:19:58,803 INFO L255 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-11-14 04:19:58,805 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 04:19:58,830 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-11-14 04:19:58,830 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 04:19:58,977 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-11-14 04:19:58,977 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1657569314] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 04:19:58,978 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1767609146] [2024-11-14 04:19:58,979 INFO L159 IcfgInterpreter]: Started Sifa with 6 locations of interest [2024-11-14 04:19:58,980 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 04:19:58,980 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 04:19:58,980 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 04:19:58,980 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 04:19:59,146 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 04:19:59,180 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '279#(<= 1 |#StackHeapBarrier|)' at error location [2024-11-14 04:19:59,180 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 04:19:59,180 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 04:19:59,180 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 8 [2024-11-14 04:19:59,180 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2003835010] [2024-11-14 04:19:59,181 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 04:19:59,181 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-11-14 04:19:59,181 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 04:19:59,182 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-11-14 04:19:59,182 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2024-11-14 04:19:59,182 INFO L87 Difference]: Start difference. First operand 12 states and 13 transitions. Second operand has 9 states, 9 states have (on average 1.5555555555555556) internal successors, (14), 8 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:19:59,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:19:59,212 INFO L93 Difference]: Finished difference Result 24 states and 29 transitions. [2024-11-14 04:19:59,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-14 04:19:59,212 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 1.5555555555555556) internal successors, (14), 8 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2024-11-14 04:19:59,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:19:59,213 INFO L225 Difference]: With dead ends: 24 [2024-11-14 04:19:59,213 INFO L226 Difference]: Without dead ends: 16 [2024-11-14 04:19:59,213 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2024-11-14 04:19:59,214 INFO L432 NwaCegarLoop]: 3 mSDtfsCounter, 0 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 11 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-14 04:19:59,214 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 11 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-14 04:19:59,215 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2024-11-14 04:19:59,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2024-11-14 04:19:59,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 15 states have (on average 1.1333333333333333) internal successors, (17), 15 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:19:59,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 17 transitions. [2024-11-14 04:19:59,219 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 17 transitions. Word has length 11 [2024-11-14 04:19:59,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:19:59,219 INFO L471 AbstractCegarLoop]: Abstraction has 16 states and 17 transitions. [2024-11-14 04:19:59,220 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 1.5555555555555556) internal successors, (14), 8 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:19:59,220 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 17 transitions. [2024-11-14 04:19:59,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2024-11-14 04:19:59,220 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:19:59,220 INFO L215 NwaCegarLoop]: trace histogram [6, 4, 1, 1, 1, 1, 1] [2024-11-14 04:19:59,241 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67869a4d-d229-4cb0-9819-bbb32311f7a0/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-11-14 04:19:59,421 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67869a4d-d229-4cb0-9819-bbb32311f7a0/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:19:59,421 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 04:19:59,422 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:19:59,422 INFO L85 PathProgramCache]: Analyzing trace with hash 100187885, now seen corresponding path program 3 times [2024-11-14 04:19:59,422 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:19:59,422 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2102062308] [2024-11-14 04:19:59,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:19:59,422 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:19:59,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:19:59,891 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-11-14 04:19:59,892 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:19:59,892 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2102062308] [2024-11-14 04:19:59,892 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2102062308] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 04:19:59,892 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [166148188] [2024-11-14 04:19:59,892 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-14 04:19:59,892 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:19:59,893 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67869a4d-d229-4cb0-9819-bbb32311f7a0/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 04:19:59,898 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67869a4d-d229-4cb0-9819-bbb32311f7a0/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 04:19:59,900 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67869a4d-d229-4cb0-9819-bbb32311f7a0/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-14 04:19:59,965 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-14 04:19:59,965 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 04:19:59,970 INFO L255 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-11-14 04:19:59,974 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 04:20:00,256 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 04:20:00,257 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 04:20:01,675 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 21 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 04:20:01,676 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [166148188] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 04:20:01,676 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [394226053] [2024-11-14 04:20:01,680 INFO L159 IcfgInterpreter]: Started Sifa with 6 locations of interest [2024-11-14 04:20:01,680 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 04:20:01,680 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 04:20:01,681 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 04:20:01,681 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 04:20:01,777 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 04:20:01,843 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '466#(<= 1 |#StackHeapBarrier|)' at error location [2024-11-14 04:20:01,843 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 04:20:01,843 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 04:20:01,843 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 12, 12] total 30 [2024-11-14 04:20:01,843 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [799066139] [2024-11-14 04:20:01,843 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 04:20:01,844 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2024-11-14 04:20:01,844 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 04:20:01,844 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2024-11-14 04:20:01,845 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=331, Invalid=791, Unknown=0, NotChecked=0, Total=1122 [2024-11-14 04:20:01,845 INFO L87 Difference]: Start difference. First operand 16 states and 17 transitions. Second operand has 31 states, 31 states have (on average 1.2258064516129032) internal successors, (38), 30 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:20:01,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:20:01,948 INFO L93 Difference]: Finished difference Result 31 states and 39 transitions. [2024-11-14 04:20:01,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-11-14 04:20:01,949 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.2258064516129032) internal successors, (38), 30 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2024-11-14 04:20:01,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:20:01,950 INFO L225 Difference]: With dead ends: 31 [2024-11-14 04:20:01,950 INFO L226 Difference]: Without dead ends: 23 [2024-11-14 04:20:01,952 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 425 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=388, Invalid=872, Unknown=0, NotChecked=0, Total=1260 [2024-11-14 04:20:01,953 INFO L432 NwaCegarLoop]: 2 mSDtfsCounter, 0 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 14 SdHoareTripleChecker+Invalid, 45 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-14 04:20:01,953 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 14 Invalid, 45 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-14 04:20:01,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2024-11-14 04:20:01,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2024-11-14 04:20:01,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 22 states have (on average 1.0909090909090908) internal successors, (24), 22 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:20:01,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 24 transitions. [2024-11-14 04:20:01,958 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 24 transitions. Word has length 15 [2024-11-14 04:20:01,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:20:01,959 INFO L471 AbstractCegarLoop]: Abstraction has 23 states and 24 transitions. [2024-11-14 04:20:01,959 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.2258064516129032) internal successors, (38), 30 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:20:01,959 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 24 transitions. [2024-11-14 04:20:01,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2024-11-14 04:20:01,959 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:20:01,960 INFO L215 NwaCegarLoop]: trace histogram [10, 7, 1, 1, 1, 1, 1] [2024-11-14 04:20:01,985 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67869a4d-d229-4cb0-9819-bbb32311f7a0/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-11-14 04:20:02,160 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67869a4d-d229-4cb0-9819-bbb32311f7a0/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:20:02,160 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 04:20:02,161 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:20:02,161 INFO L85 PathProgramCache]: Analyzing trace with hash -158229880, now seen corresponding path program 4 times [2024-11-14 04:20:02,161 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:20:02,161 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [976246727] [2024-11-14 04:20:02,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:20:02,161 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:20:02,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:20:02,581 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2024-11-14 04:20:02,582 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:20:02,582 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [976246727] [2024-11-14 04:20:02,582 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [976246727] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 04:20:02,582 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1394604900] [2024-11-14 04:20:02,582 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-14 04:20:02,582 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:20:02,582 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67869a4d-d229-4cb0-9819-bbb32311f7a0/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 04:20:02,584 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67869a4d-d229-4cb0-9819-bbb32311f7a0/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 04:20:02,588 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67869a4d-d229-4cb0-9819-bbb32311f7a0/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-14 04:20:02,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:20:02,662 INFO L255 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 21 conjuncts are in the unsatisfiable core [2024-11-14 04:20:02,666 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 04:20:03,127 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 0 proven. 83 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 04:20:03,127 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 04:20:05,111 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 28 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 04:20:05,111 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1394604900] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 04:20:05,111 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [615550095] [2024-11-14 04:20:05,113 INFO L159 IcfgInterpreter]: Started Sifa with 6 locations of interest [2024-11-14 04:20:05,114 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 04:20:05,115 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 04:20:05,115 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 04:20:05,116 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 04:20:05,203 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 04:20:05,261 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '742#(<= 1 |#StackHeapBarrier|)' at error location [2024-11-14 04:20:05,261 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 04:20:05,261 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 04:20:05,261 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 19, 19] total 45 [2024-11-14 04:20:05,261 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [506333753] [2024-11-14 04:20:05,262 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 04:20:05,262 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2024-11-14 04:20:05,262 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 04:20:05,263 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2024-11-14 04:20:05,265 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=768, Invalid=1584, Unknown=0, NotChecked=0, Total=2352 [2024-11-14 04:20:05,266 INFO L87 Difference]: Start difference. First operand 23 states and 24 transitions. Second operand has 46 states, 46 states have (on average 1.1521739130434783) internal successors, (53), 45 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:20:05,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:20:05,378 INFO L93 Difference]: Finished difference Result 50 states and 64 transitions. [2024-11-14 04:20:05,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2024-11-14 04:20:05,378 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 1.1521739130434783) internal successors, (53), 45 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2024-11-14 04:20:05,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:20:05,379 INFO L225 Difference]: With dead ends: 50 [2024-11-14 04:20:05,379 INFO L226 Difference]: Without dead ends: 36 [2024-11-14 04:20:05,380 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 755 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=854, Invalid=1696, Unknown=0, NotChecked=0, Total=2550 [2024-11-14 04:20:05,381 INFO L432 NwaCegarLoop]: 2 mSDtfsCounter, 0 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 52 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 63 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 52 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-14 04:20:05,382 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 12 Invalid, 63 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 52 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-14 04:20:05,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2024-11-14 04:20:05,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2024-11-14 04:20:05,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 35 states have (on average 1.0571428571428572) internal successors, (37), 35 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:20:05,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 37 transitions. [2024-11-14 04:20:05,388 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 37 transitions. Word has length 22 [2024-11-14 04:20:05,388 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:20:05,388 INFO L471 AbstractCegarLoop]: Abstraction has 36 states and 37 transitions. [2024-11-14 04:20:05,388 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 1.1521739130434783) internal successors, (53), 45 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:20:05,388 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 37 transitions. [2024-11-14 04:20:05,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2024-11-14 04:20:05,389 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:20:05,389 INFO L215 NwaCegarLoop]: trace histogram [22, 8, 1, 1, 1, 1, 1] [2024-11-14 04:20:05,412 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67869a4d-d229-4cb0-9819-bbb32311f7a0/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-11-14 04:20:05,589 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67869a4d-d229-4cb0-9819-bbb32311f7a0/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:20:05,590 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 04:20:05,591 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:20:05,591 INFO L85 PathProgramCache]: Analyzing trace with hash 1410673741, now seen corresponding path program 5 times [2024-11-14 04:20:05,591 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:20:05,591 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [395431697] [2024-11-14 04:20:05,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:20:05,591 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:20:05,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:20:06,186 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 253 trivial. 0 not checked. [2024-11-14 04:20:06,186 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:20:06,186 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [395431697] [2024-11-14 04:20:06,186 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [395431697] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 04:20:06,186 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1555740774] [2024-11-14 04:20:06,186 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-14 04:20:06,187 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:20:06,187 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67869a4d-d229-4cb0-9819-bbb32311f7a0/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 04:20:06,189 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67869a4d-d229-4cb0-9819-bbb32311f7a0/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 04:20:06,191 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67869a4d-d229-4cb0-9819-bbb32311f7a0/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-14 04:20:06,260 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2024-11-14 04:20:06,260 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 04:20:06,261 INFO L255 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-11-14 04:20:06,265 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 04:20:06,301 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 253 trivial. 0 not checked. [2024-11-14 04:20:06,301 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 04:20:06,652 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 253 trivial. 0 not checked. [2024-11-14 04:20:06,652 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1555740774] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 04:20:06,652 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [560818366] [2024-11-14 04:20:06,654 INFO L159 IcfgInterpreter]: Started Sifa with 6 locations of interest [2024-11-14 04:20:06,654 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 04:20:06,654 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 04:20:06,654 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 04:20:06,655 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 04:20:06,713 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 04:20:06,748 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1135#(<= 1 |#StackHeapBarrier|)' at error location [2024-11-14 04:20:06,748 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 04:20:06,749 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 04:20:06,749 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 20 [2024-11-14 04:20:06,749 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2053006511] [2024-11-14 04:20:06,749 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 04:20:06,749 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-11-14 04:20:06,750 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 04:20:06,750 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-11-14 04:20:06,750 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=218, Invalid=334, Unknown=0, NotChecked=0, Total=552 [2024-11-14 04:20:06,751 INFO L87 Difference]: Start difference. First operand 36 states and 37 transitions. Second operand has 21 states, 21 states have (on average 1.2380952380952381) internal successors, (26), 20 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:20:06,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:20:06,792 INFO L93 Difference]: Finished difference Result 72 states and 83 transitions. [2024-11-14 04:20:06,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-11-14 04:20:06,793 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.2380952380952381) internal successors, (26), 20 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2024-11-14 04:20:06,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:20:06,793 INFO L225 Difference]: With dead ends: 72 [2024-11-14 04:20:06,793 INFO L226 Difference]: Without dead ends: 46 [2024-11-14 04:20:06,794 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 91 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=218, Invalid=334, Unknown=0, NotChecked=0, Total=552 [2024-11-14 04:20:06,795 INFO L432 NwaCegarLoop]: 3 mSDtfsCounter, 0 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 13 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-14 04:20:06,795 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 13 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-14 04:20:06,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2024-11-14 04:20:06,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2024-11-14 04:20:06,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 45 states have (on average 1.0444444444444445) internal successors, (47), 45 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:20:06,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 47 transitions. [2024-11-14 04:20:06,802 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 47 transitions. Word has length 35 [2024-11-14 04:20:06,802 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:20:06,803 INFO L471 AbstractCegarLoop]: Abstraction has 46 states and 47 transitions. [2024-11-14 04:20:06,803 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.2380952380952381) internal successors, (26), 20 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:20:06,803 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 47 transitions. [2024-11-14 04:20:06,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2024-11-14 04:20:06,804 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:20:06,804 INFO L215 NwaCegarLoop]: trace histogram [22, 18, 1, 1, 1, 1, 1] [2024-11-14 04:20:06,824 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67869a4d-d229-4cb0-9819-bbb32311f7a0/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2024-11-14 04:20:07,004 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67869a4d-d229-4cb0-9819-bbb32311f7a0/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:20:07,004 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 04:20:07,005 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:20:07,005 INFO L85 PathProgramCache]: Analyzing trace with hash 192754989, now seen corresponding path program 6 times [2024-11-14 04:20:07,005 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:20:07,005 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2001540504] [2024-11-14 04:20:07,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:20:07,006 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:20:07,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:20:08,351 INFO L134 CoverageAnalysis]: Checked inductivity of 424 backedges. 0 proven. 171 refuted. 0 times theorem prover too weak. 253 trivial. 0 not checked. [2024-11-14 04:20:08,351 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:20:08,351 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2001540504] [2024-11-14 04:20:08,351 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2001540504] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 04:20:08,352 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [101200707] [2024-11-14 04:20:08,352 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-14 04:20:08,352 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:20:08,352 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67869a4d-d229-4cb0-9819-bbb32311f7a0/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 04:20:08,355 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67869a4d-d229-4cb0-9819-bbb32311f7a0/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 04:20:08,358 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67869a4d-d229-4cb0-9819-bbb32311f7a0/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-14 04:20:08,465 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-14 04:20:08,465 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 04:20:08,467 INFO L255 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 44 conjuncts are in the unsatisfiable core [2024-11-14 04:20:08,475 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 04:20:09,846 INFO L134 CoverageAnalysis]: Checked inductivity of 424 backedges. 0 proven. 424 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 04:20:09,846 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 04:20:22,528 INFO L134 CoverageAnalysis]: Checked inductivity of 424 backedges. 171 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 04:20:22,531 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [101200707] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 04:20:22,531 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [269694738] [2024-11-14 04:20:22,535 INFO L159 IcfgInterpreter]: Started Sifa with 6 locations of interest [2024-11-14 04:20:22,535 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 04:20:22,536 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 04:20:22,536 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 04:20:22,536 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 04:20:22,614 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 04:20:22,708 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1730#(<= 1 |#StackHeapBarrier|)' at error location [2024-11-14 04:20:22,708 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 04:20:22,708 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 04:20:22,708 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 42, 42] total 102 [2024-11-14 04:20:22,708 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [496033156] [2024-11-14 04:20:22,708 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 04:20:22,709 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 103 states [2024-11-14 04:20:22,709 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 04:20:22,711 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 103 interpolants. [2024-11-14 04:20:22,716 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3738, Invalid=7392, Unknown=0, NotChecked=0, Total=11130 [2024-11-14 04:20:22,717 INFO L87 Difference]: Start difference. First operand 46 states and 47 transitions. Second operand has 103 states, 103 states have (on average 1.0679611650485437) internal successors, (110), 102 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:20:23,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:20:23,004 INFO L93 Difference]: Finished difference Result 97 states and 123 transitions. [2024-11-14 04:20:23,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2024-11-14 04:20:23,005 INFO L78 Accepts]: Start accepts. Automaton has has 103 states, 103 states have (on average 1.0679611650485437) internal successors, (110), 102 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 45 [2024-11-14 04:20:23,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:20:23,007 INFO L225 Difference]: With dead ends: 97 [2024-11-14 04:20:23,008 INFO L226 Difference]: Without dead ends: 71 [2024-11-14 04:20:23,011 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 106 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3751 ImplicationChecksByTransitivity, 8.0s TimeCoverageRelationStatistics Valid=3927, Invalid=7629, Unknown=0, NotChecked=0, Total=11556 [2024-11-14 04:20:23,012 INFO L432 NwaCegarLoop]: 2 mSDtfsCounter, 0 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 104 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 115 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 104 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-14 04:20:23,013 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 18 Invalid, 115 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 104 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-14 04:20:23,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2024-11-14 04:20:23,025 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 71. [2024-11-14 04:20:23,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 70 states have (on average 1.0285714285714285) internal successors, (72), 70 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:20:23,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 72 transitions. [2024-11-14 04:20:23,027 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 72 transitions. Word has length 45 [2024-11-14 04:20:23,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:20:23,027 INFO L471 AbstractCegarLoop]: Abstraction has 71 states and 72 transitions. [2024-11-14 04:20:23,027 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 103 states, 103 states have (on average 1.0679611650485437) internal successors, (110), 102 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:20:23,028 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 72 transitions. [2024-11-14 04:20:23,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2024-11-14 04:20:23,029 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:20:23,029 INFO L215 NwaCegarLoop]: trace histogram [46, 19, 1, 1, 1, 1, 1] [2024-11-14 04:20:23,050 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67869a4d-d229-4cb0-9819-bbb32311f7a0/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-11-14 04:20:23,233 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67869a4d-d229-4cb0-9819-bbb32311f7a0/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:20:23,233 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 04:20:23,234 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:20:23,234 INFO L85 PathProgramCache]: Analyzing trace with hash 1238030536, now seen corresponding path program 7 times [2024-11-14 04:20:23,234 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:20:23,234 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1684508959] [2024-11-14 04:20:23,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:20:23,234 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:20:23,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:20:24,719 INFO L134 CoverageAnalysis]: Checked inductivity of 1271 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 1081 trivial. 0 not checked. [2024-11-14 04:20:24,719 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:20:24,719 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1684508959] [2024-11-14 04:20:24,719 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1684508959] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 04:20:24,719 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1487111000] [2024-11-14 04:20:24,720 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-14 04:20:24,720 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:20:24,720 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67869a4d-d229-4cb0-9819-bbb32311f7a0/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 04:20:24,722 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67869a4d-d229-4cb0-9819-bbb32311f7a0/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 04:20:24,724 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67869a4d-d229-4cb0-9819-bbb32311f7a0/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-14 04:20:24,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:20:24,844 INFO L255 TraceCheckSpWp]: Trace formula consists of 302 conjuncts, 70 conjuncts are in the unsatisfiable core [2024-11-14 04:20:24,851 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 04:20:25,331 INFO L134 CoverageAnalysis]: Checked inductivity of 1271 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 1081 trivial. 0 not checked. [2024-11-14 04:20:25,332 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 04:20:28,818 INFO L134 CoverageAnalysis]: Checked inductivity of 1271 backedges. 0 proven. 1271 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 04:20:28,819 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1487111000] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 04:20:28,819 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [647959692] [2024-11-14 04:20:28,820 INFO L159 IcfgInterpreter]: Started Sifa with 6 locations of interest [2024-11-14 04:20:28,820 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 04:20:28,821 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 04:20:28,821 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 04:20:28,821 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 04:20:28,883 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 04:20:28,955 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2585#(<= 1 |#StackHeapBarrier|)' at error location [2024-11-14 04:20:28,955 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 04:20:28,955 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 04:20:28,956 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21, 68] total 108 [2024-11-14 04:20:28,956 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2039992321] [2024-11-14 04:20:28,956 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 04:20:28,956 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 109 states [2024-11-14 04:20:28,956 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 04:20:28,958 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 109 interpolants. [2024-11-14 04:20:28,963 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3843, Invalid=8589, Unknown=0, NotChecked=0, Total=12432 [2024-11-14 04:20:28,963 INFO L87 Difference]: Start difference. First operand 71 states and 72 transitions. Second operand has 109 states, 109 states have (on average 1.0458715596330275) internal successors, (114), 108 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:20:29,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:20:29,171 INFO L93 Difference]: Finished difference Result 123 states and 126 transitions. [2024-11-14 04:20:29,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2024-11-14 04:20:29,172 INFO L78 Accepts]: Start accepts. Automaton has has 109 states, 109 states have (on average 1.0458715596330275) internal successors, (114), 108 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 70 [2024-11-14 04:20:29,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:20:29,173 INFO L225 Difference]: With dead ends: 123 [2024-11-14 04:20:29,173 INFO L226 Difference]: Without dead ends: 73 [2024-11-14 04:20:29,176 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 230 GetRequests, 119 SyntacticMatches, 0 SemanticMatches, 111 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5016 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=3952, Invalid=8704, Unknown=0, NotChecked=0, Total=12656 [2024-11-14 04:20:29,177 INFO L432 NwaCegarLoop]: 2 mSDtfsCounter, 0 mSDsluCounter, 56 mSDsCounter, 0 mSdLazyCounter, 127 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 133 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 127 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-14 04:20:29,177 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 58 Invalid, 133 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 127 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-14 04:20:29,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2024-11-14 04:20:29,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 73. [2024-11-14 04:20:29,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 72 states have (on average 1.0277777777777777) internal successors, (74), 72 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:20:29,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 74 transitions. [2024-11-14 04:20:29,187 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 74 transitions. Word has length 70 [2024-11-14 04:20:29,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:20:29,188 INFO L471 AbstractCegarLoop]: Abstraction has 73 states and 74 transitions. [2024-11-14 04:20:29,188 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 109 states, 109 states have (on average 1.0458715596330275) internal successors, (114), 108 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:20:29,188 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 74 transitions. [2024-11-14 04:20:29,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2024-11-14 04:20:29,189 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:20:29,189 INFO L215 NwaCegarLoop]: trace histogram [47, 20, 1, 1, 1, 1, 1] [2024-11-14 04:20:29,232 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67869a4d-d229-4cb0-9819-bbb32311f7a0/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-11-14 04:20:29,389 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67869a4d-d229-4cb0-9819-bbb32311f7a0/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:20:29,390 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 04:20:29,390 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:20:29,390 INFO L85 PathProgramCache]: Analyzing trace with hash 1852811549, now seen corresponding path program 8 times [2024-11-14 04:20:29,390 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:20:29,390 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [441586352] [2024-11-14 04:20:29,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:20:29,390 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:20:29,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:20:31,480 INFO L134 CoverageAnalysis]: Checked inductivity of 1338 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 1128 trivial. 0 not checked. [2024-11-14 04:20:31,480 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:20:31,480 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [441586352] [2024-11-14 04:20:31,480 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [441586352] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 04:20:31,480 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1710399033] [2024-11-14 04:20:31,481 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-14 04:20:31,481 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:20:31,481 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67869a4d-d229-4cb0-9819-bbb32311f7a0/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 04:20:31,483 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67869a4d-d229-4cb0-9819-bbb32311f7a0/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 04:20:31,486 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67869a4d-d229-4cb0-9819-bbb32311f7a0/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-11-14 04:20:31,608 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2024-11-14 04:20:31,609 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 04:20:31,611 INFO L255 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 22 conjuncts are in the unsatisfiable core [2024-11-14 04:20:31,618 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 04:20:31,829 INFO L134 CoverageAnalysis]: Checked inductivity of 1338 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 1128 trivial. 0 not checked. [2024-11-14 04:20:31,829 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 04:20:32,921 INFO L134 CoverageAnalysis]: Checked inductivity of 1338 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 1128 trivial. 0 not checked. [2024-11-14 04:20:32,921 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1710399033] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 04:20:32,922 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1887325839] [2024-11-14 04:20:32,923 INFO L159 IcfgInterpreter]: Started Sifa with 6 locations of interest [2024-11-14 04:20:32,923 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 04:20:32,923 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 04:20:32,924 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 04:20:32,924 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 04:20:32,977 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 04:20:33,025 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3448#(<= 1 |#StackHeapBarrier|)' at error location [2024-11-14 04:20:33,025 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 04:20:33,025 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 04:20:33,025 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22, 22] total 50 [2024-11-14 04:20:33,025 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [105047288] [2024-11-14 04:20:33,025 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 04:20:33,026 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2024-11-14 04:20:33,026 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 04:20:33,027 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2024-11-14 04:20:33,027 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1283, Invalid=1579, Unknown=0, NotChecked=0, Total=2862 [2024-11-14 04:20:33,028 INFO L87 Difference]: Start difference. First operand 73 states and 74 transitions. Second operand has 51 states, 51 states have (on average 1.1176470588235294) internal successors, (57), 50 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:20:33,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:20:33,135 INFO L93 Difference]: Finished difference Result 152 states and 181 transitions. [2024-11-14 04:20:33,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2024-11-14 04:20:33,136 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 1.1176470588235294) internal successors, (57), 50 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 72 [2024-11-14 04:20:33,136 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:20:33,137 INFO L225 Difference]: With dead ends: 152 [2024-11-14 04:20:33,138 INFO L226 Difference]: Without dead ends: 101 [2024-11-14 04:20:33,139 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 236 GetRequests, 184 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 684 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1283, Invalid=1579, Unknown=0, NotChecked=0, Total=2862 [2024-11-14 04:20:33,139 INFO L432 NwaCegarLoop]: 3 mSDtfsCounter, 0 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 70 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 15 SdHoareTripleChecker+Invalid, 72 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 70 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-14 04:20:33,139 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 15 Invalid, 72 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 70 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-14 04:20:33,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2024-11-14 04:20:33,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 101. [2024-11-14 04:20:33,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 100 states have (on average 1.02) internal successors, (102), 100 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:20:33,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 102 transitions. [2024-11-14 04:20:33,156 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 102 transitions. Word has length 72 [2024-11-14 04:20:33,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:20:33,156 INFO L471 AbstractCegarLoop]: Abstraction has 101 states and 102 transitions. [2024-11-14 04:20:33,157 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 1.1176470588235294) internal successors, (57), 50 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:20:33,157 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 102 transitions. [2024-11-14 04:20:33,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2024-11-14 04:20:33,158 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:20:33,158 INFO L215 NwaCegarLoop]: trace histogram [48, 47, 1, 1, 1, 1, 1] [2024-11-14 04:20:33,178 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67869a4d-d229-4cb0-9819-bbb32311f7a0/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2024-11-14 04:20:33,362 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67869a4d-d229-4cb0-9819-bbb32311f7a0/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:20:33,362 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 04:20:33,362 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:20:33,362 INFO L85 PathProgramCache]: Analyzing trace with hash -1719969315, now seen corresponding path program 9 times [2024-11-14 04:20:33,362 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:20:33,362 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1425889528] [2024-11-14 04:20:33,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:20:33,363 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:20:33,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:20:38,809 INFO L134 CoverageAnalysis]: Checked inductivity of 2304 backedges. 0 proven. 1176 refuted. 0 times theorem prover too weak. 1128 trivial. 0 not checked. [2024-11-14 04:20:38,809 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:20:38,809 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1425889528] [2024-11-14 04:20:38,809 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1425889528] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 04:20:38,809 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1054841242] [2024-11-14 04:20:38,809 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-14 04:20:38,810 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:20:38,810 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67869a4d-d229-4cb0-9819-bbb32311f7a0/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 04:20:38,812 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67869a4d-d229-4cb0-9819-bbb32311f7a0/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 04:20:38,815 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67869a4d-d229-4cb0-9819-bbb32311f7a0/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-11-14 04:20:39,050 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-14 04:20:39,051 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 04:20:39,056 INFO L255 TraceCheckSpWp]: Trace formula consists of 365 conjuncts, 50 conjuncts are in the unsatisfiable core [2024-11-14 04:20:39,068 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 04:20:39,191 INFO L134 CoverageAnalysis]: Checked inductivity of 2304 backedges. 0 proven. 1176 refuted. 0 times theorem prover too weak. 1128 trivial. 0 not checked. [2024-11-14 04:20:39,191 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 04:20:43,135 INFO L134 CoverageAnalysis]: Checked inductivity of 2304 backedges. 0 proven. 1176 refuted. 0 times theorem prover too weak. 1128 trivial. 0 not checked. [2024-11-14 04:20:43,135 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1054841242] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 04:20:43,135 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [471559080] [2024-11-14 04:20:43,137 INFO L159 IcfgInterpreter]: Started Sifa with 6 locations of interest [2024-11-14 04:20:43,137 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 04:20:43,137 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 04:20:43,137 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 04:20:43,137 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 04:20:43,181 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 04:20:43,260 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '4641#(<= 1 |#StackHeapBarrier|)' at error location [2024-11-14 04:20:43,260 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 04:20:43,260 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 04:20:43,261 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 50, 50] total 100 [2024-11-14 04:20:43,261 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1859801732] [2024-11-14 04:20:43,261 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 04:20:43,261 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 101 states [2024-11-14 04:20:43,261 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 04:20:43,263 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 101 interpolants. [2024-11-14 04:20:43,265 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5058, Invalid=5654, Unknown=0, NotChecked=0, Total=10712 [2024-11-14 04:20:43,265 INFO L87 Difference]: Start difference. First operand 101 states and 102 transitions. Second operand has 101 states, 101 states have (on average 1.0495049504950495) internal successors, (106), 100 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:20:43,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:20:43,438 INFO L93 Difference]: Finished difference Result 202 states and 253 transitions. [2024-11-14 04:20:43,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 100 states. [2024-11-14 04:20:43,439 INFO L78 Accepts]: Start accepts. Automaton has has 101 states, 101 states have (on average 1.0495049504950495) internal successors, (106), 100 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 100 [2024-11-14 04:20:43,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:20:43,441 INFO L225 Difference]: With dead ends: 202 [2024-11-14 04:20:43,441 INFO L226 Difference]: Without dead ends: 151 [2024-11-14 04:20:43,442 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 348 GetRequests, 246 SyntacticMatches, 0 SemanticMatches, 102 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 633 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=5058, Invalid=5654, Unknown=0, NotChecked=0, Total=10712 [2024-11-14 04:20:43,443 INFO L432 NwaCegarLoop]: 3 mSDtfsCounter, 0 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 114 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 11 SdHoareTripleChecker+Invalid, 115 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 114 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-14 04:20:43,443 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 11 Invalid, 115 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 114 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-14 04:20:43,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2024-11-14 04:20:43,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 151. [2024-11-14 04:20:43,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151 states, 150 states have (on average 1.0133333333333334) internal successors, (152), 150 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:20:43,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 152 transitions. [2024-11-14 04:20:43,469 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 152 transitions. Word has length 100 [2024-11-14 04:20:43,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:20:43,471 INFO L471 AbstractCegarLoop]: Abstraction has 151 states and 152 transitions. [2024-11-14 04:20:43,471 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 101 states, 101 states have (on average 1.0495049504950495) internal successors, (106), 100 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:20:43,471 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 152 transitions. [2024-11-14 04:20:43,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2024-11-14 04:20:43,476 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:20:43,476 INFO L215 NwaCegarLoop]: trace histogram [98, 47, 1, 1, 1, 1, 1] [2024-11-14 04:20:43,497 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67869a4d-d229-4cb0-9819-bbb32311f7a0/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2024-11-14 04:20:43,676 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67869a4d-d229-4cb0-9819-bbb32311f7a0/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:20:43,677 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 04:20:43,677 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:20:43,677 INFO L85 PathProgramCache]: Analyzing trace with hash 1225369981, now seen corresponding path program 10 times [2024-11-14 04:20:43,677 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:20:43,677 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [518728631] [2024-11-14 04:20:43,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:20:43,677 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:20:43,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:20:59,088 INFO L134 CoverageAnalysis]: Checked inductivity of 5979 backedges. 0 proven. 4851 refuted. 0 times theorem prover too weak. 1128 trivial. 0 not checked. [2024-11-14 04:20:59,088 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:20:59,088 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [518728631] [2024-11-14 04:20:59,088 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [518728631] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 04:20:59,088 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1094322158] [2024-11-14 04:20:59,088 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-14 04:20:59,089 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:20:59,089 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67869a4d-d229-4cb0-9819-bbb32311f7a0/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 04:20:59,090 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67869a4d-d229-4cb0-9819-bbb32311f7a0/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 04:20:59,091 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67869a4d-d229-4cb0-9819-bbb32311f7a0/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-11-14 04:20:59,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:20:59,325 INFO L255 TraceCheckSpWp]: Trace formula consists of 465 conjuncts, 150 conjuncts are in the unsatisfiable core [2024-11-14 04:20:59,350 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 04:21:04,972 INFO L134 CoverageAnalysis]: Checked inductivity of 5979 backedges. 0 proven. 4851 refuted. 0 times theorem prover too weak. 1128 trivial. 0 not checked. [2024-11-14 04:21:04,973 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 04:21:28,353 INFO L134 CoverageAnalysis]: Checked inductivity of 5979 backedges. 0 proven. 5979 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 04:21:28,353 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1094322158] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 04:21:28,353 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1542489032] [2024-11-14 04:21:28,357 INFO L159 IcfgInterpreter]: Started Sifa with 6 locations of interest [2024-11-14 04:21:28,357 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 04:21:28,357 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 04:21:28,357 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 04:21:28,357 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 04:21:28,416 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 04:21:28,730 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '6580#(<= 1 |#StackHeapBarrier|)' at error location [2024-11-14 04:21:28,730 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 04:21:28,730 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 04:21:28,730 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [100, 100, 148] total 346 [2024-11-14 04:21:28,730 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [638860560] [2024-11-14 04:21:28,731 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 04:21:28,731 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 347 states [2024-11-14 04:21:28,731 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 04:21:28,739 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 347 interpolants. [2024-11-14 04:21:28,749 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44456, Invalid=77694, Unknown=0, NotChecked=0, Total=122150 [2024-11-14 04:21:28,749 INFO L87 Difference]: Start difference. First operand 151 states and 152 transitions. Second operand has 347 states, 347 states have (on average 1.0144092219020173) internal successors, (352), 346 states have internal predecessors, (352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:21:32,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:21:32,345 INFO L93 Difference]: Finished difference Result 204 states and 207 transitions. [2024-11-14 04:21:32,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 150 states. [2024-11-14 04:21:32,346 INFO L78 Accepts]: Start accepts. Automaton has has 347 states, 347 states have (on average 1.0144092219020173) internal successors, (352), 346 states have internal predecessors, (352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 150 [2024-11-14 04:21:32,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:21:32,348 INFO L225 Difference]: With dead ends: 204 [2024-11-14 04:21:32,348 INFO L226 Difference]: Without dead ends: 153 [2024-11-14 04:21:32,353 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 550 GetRequests, 200 SyntacticMatches, 0 SemanticMatches, 350 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58403 ImplicationChecksByTransitivity, 31.8s TimeCoverageRelationStatistics Valid=45103, Invalid=78449, Unknown=0, NotChecked=0, Total=123552 [2024-11-14 04:21:32,354 INFO L432 NwaCegarLoop]: 2 mSDtfsCounter, 0 mSDsluCounter, 200 mSDsCounter, 0 mSdLazyCounter, 346 mSolverCounterSat, 114 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 202 SdHoareTripleChecker+Invalid, 460 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 114 IncrementalHoareTripleChecker+Valid, 346 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-14 04:21:32,354 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 202 Invalid, 460 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [114 Valid, 346 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-14 04:21:32,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2024-11-14 04:21:32,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 153. [2024-11-14 04:21:32,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 153 states, 152 states have (on average 1.013157894736842) internal successors, (154), 152 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:21:32,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 154 transitions. [2024-11-14 04:21:32,376 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 154 transitions. Word has length 150 [2024-11-14 04:21:32,376 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:21:32,376 INFO L471 AbstractCegarLoop]: Abstraction has 153 states and 154 transitions. [2024-11-14 04:21:32,377 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 347 states, 347 states have (on average 1.0144092219020173) internal successors, (352), 346 states have internal predecessors, (352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:21:32,377 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 154 transitions. [2024-11-14 04:21:32,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2024-11-14 04:21:32,379 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:21:32,379 INFO L215 NwaCegarLoop]: trace histogram [99, 48, 1, 1, 1, 1, 1] [2024-11-14 04:21:32,401 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67869a4d-d229-4cb0-9819-bbb32311f7a0/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2024-11-14 04:21:32,579 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67869a4d-d229-4cb0-9819-bbb32311f7a0/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:21:32,580 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 04:21:32,580 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:21:32,580 INFO L85 PathProgramCache]: Analyzing trace with hash 1693942024, now seen corresponding path program 11 times [2024-11-14 04:21:32,580 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:21:32,580 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1059682818] [2024-11-14 04:21:32,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:21:32,580 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:21:32,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:21:46,652 INFO L134 CoverageAnalysis]: Checked inductivity of 6126 backedges. 0 proven. 4950 refuted. 0 times theorem prover too weak. 1176 trivial. 0 not checked. [2024-11-14 04:21:46,652 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:21:46,652 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1059682818] [2024-11-14 04:21:46,653 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1059682818] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 04:21:46,653 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1780236916] [2024-11-14 04:21:46,653 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-14 04:21:46,653 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:21:46,653 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67869a4d-d229-4cb0-9819-bbb32311f7a0/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 04:21:46,655 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67869a4d-d229-4cb0-9819-bbb32311f7a0/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 04:21:46,655 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67869a4d-d229-4cb0-9819-bbb32311f7a0/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-11-14 04:21:47,185 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 51 check-sat command(s) [2024-11-14 04:21:47,186 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 04:21:47,191 INFO L255 TraceCheckSpWp]: Trace formula consists of 472 conjuncts, 101 conjuncts are in the unsatisfiable core [2024-11-14 04:21:47,213 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 04:21:47,418 INFO L134 CoverageAnalysis]: Checked inductivity of 6126 backedges. 0 proven. 4950 refuted. 0 times theorem prover too weak. 1176 trivial. 0 not checked. [2024-11-14 04:21:47,419 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 04:22:01,306 INFO L134 CoverageAnalysis]: Checked inductivity of 6126 backedges. 0 proven. 4950 refuted. 0 times theorem prover too weak. 1176 trivial. 0 not checked. [2024-11-14 04:22:01,306 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1780236916] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 04:22:01,306 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1629514014] [2024-11-14 04:22:01,307 INFO L159 IcfgInterpreter]: Started Sifa with 6 locations of interest [2024-11-14 04:22:01,308 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 04:22:01,308 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 04:22:01,308 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 04:22:01,308 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 04:22:01,367 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 04:22:01,517 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '8399#(<= 1 |#StackHeapBarrier|)' at error location [2024-11-14 04:22:01,517 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 04:22:01,517 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 04:22:01,517 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [101, 101, 101] total 202 [2024-11-14 04:22:01,518 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [152565138] [2024-11-14 04:22:01,518 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 04:22:01,518 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 203 states [2024-11-14 04:22:01,518 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 04:22:01,522 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 203 interpolants. [2024-11-14 04:22:01,523 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20511, Invalid=21719, Unknown=0, NotChecked=0, Total=42230 [2024-11-14 04:22:01,524 INFO L87 Difference]: Start difference. First operand 153 states and 154 transitions. Second operand has 203 states, 203 states have (on average 1.0246305418719213) internal successors, (208), 202 states have internal predecessors, (208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:22:02,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:22:02,128 INFO L93 Difference]: Finished difference Result 306 states and 408 transitions. [2024-11-14 04:22:02,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 202 states. [2024-11-14 04:22:02,129 INFO L78 Accepts]: Start accepts. Automaton has has 203 states, 203 states have (on average 1.0246305418719213) internal successors, (208), 202 states have internal predecessors, (208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 152 [2024-11-14 04:22:02,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:22:02,131 INFO L225 Difference]: With dead ends: 306 [2024-11-14 04:22:02,131 INFO L226 Difference]: Without dead ends: 254 [2024-11-14 04:22:02,133 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 555 GetRequests, 351 SyntacticMatches, 0 SemanticMatches, 204 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1296 ImplicationChecksByTransitivity, 16.6s TimeCoverageRelationStatistics Valid=20511, Invalid=21719, Unknown=0, NotChecked=0, Total=42230 [2024-11-14 04:22:02,134 INFO L432 NwaCegarLoop]: 3 mSDtfsCounter, 0 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 217 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 11 SdHoareTripleChecker+Invalid, 218 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 217 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-14 04:22:02,134 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 11 Invalid, 218 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 217 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-14 04:22:02,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 254 states. [2024-11-14 04:22:02,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 254 to 254. [2024-11-14 04:22:02,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 254 states, 253 states have (on average 1.007905138339921) internal successors, (255), 253 states have internal predecessors, (255), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:22:02,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 254 states to 254 states and 255 transitions. [2024-11-14 04:22:02,168 INFO L78 Accepts]: Start accepts. Automaton has 254 states and 255 transitions. Word has length 152 [2024-11-14 04:22:02,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:22:02,168 INFO L471 AbstractCegarLoop]: Abstraction has 254 states and 255 transitions. [2024-11-14 04:22:02,168 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 203 states, 203 states have (on average 1.0246305418719213) internal successors, (208), 202 states have internal predecessors, (208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:22:02,169 INFO L276 IsEmpty]: Start isEmpty. Operand 254 states and 255 transitions. [2024-11-14 04:22:02,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 254 [2024-11-14 04:22:02,172 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:22:02,172 INFO L215 NwaCegarLoop]: trace histogram [200, 48, 1, 1, 1, 1, 1] [2024-11-14 04:22:02,190 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67869a4d-d229-4cb0-9819-bbb32311f7a0/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2024-11-14 04:22:02,372 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67869a4d-d229-4cb0-9819-bbb32311f7a0/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2024-11-14 04:22:02,372 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 04:22:02,373 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:22:02,373 INFO L85 PathProgramCache]: Analyzing trace with hash 2029562445, now seen corresponding path program 12 times [2024-11-14 04:22:02,373 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:22:02,373 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2091124595] [2024-11-14 04:22:02,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:22:02,373 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:22:04,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:23:04,794 INFO L134 CoverageAnalysis]: Checked inductivity of 21276 backedges. 0 proven. 20100 refuted. 0 times theorem prover too weak. 1176 trivial. 0 not checked. [2024-11-14 04:23:04,795 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:23:04,795 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2091124595] [2024-11-14 04:23:04,795 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2091124595] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 04:23:04,795 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1366443562] [2024-11-14 04:23:04,795 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-14 04:23:04,795 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:23:04,795 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67869a4d-d229-4cb0-9819-bbb32311f7a0/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 04:23:04,798 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67869a4d-d229-4cb0-9819-bbb32311f7a0/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 04:23:04,799 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67869a4d-d229-4cb0-9819-bbb32311f7a0/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-11-14 04:23:05,561 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-14 04:23:05,561 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 04:23:05,575 INFO L255 TraceCheckSpWp]: Trace formula consists of 674 conjuncts, 253 conjuncts are in the unsatisfiable core [2024-11-14 04:23:05,616 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 04:23:26,590 INFO L134 CoverageAnalysis]: Checked inductivity of 21276 backedges. 0 proven. 20100 refuted. 0 times theorem prover too weak. 1176 trivial. 0 not checked. [2024-11-14 04:23:26,591 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 04:24:51,384 INFO L134 CoverageAnalysis]: Checked inductivity of 21276 backedges. 0 proven. 21276 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 04:24:51,384 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1366443562] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 04:24:51,384 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1001695630] [2024-11-14 04:24:51,386 INFO L159 IcfgInterpreter]: Started Sifa with 6 locations of interest [2024-11-14 04:24:51,386 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 04:24:51,386 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 04:24:51,386 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 04:24:51,386 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 04:24:51,467 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 04:24:52,366 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '11677#(<= 1 |#StackHeapBarrier|)' at error location [2024-11-14 04:24:52,366 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 04:24:52,366 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 04:24:52,367 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [202, 202, 251] total 653 [2024-11-14 04:24:52,367 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [318378167] [2024-11-14 04:24:52,367 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 04:24:52,369 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 654 states [2024-11-14 04:24:52,369 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 04:24:52,407 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 654 interpolants. [2024-11-14 04:24:52,421 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=162313, Invalid=268679, Unknown=0, NotChecked=0, Total=430992 [2024-11-14 04:24:52,423 INFO L87 Difference]: Start difference. First operand 254 states and 255 transitions. Second operand has 654 states, 654 states have (on average 1.007645259938838) internal successors, (659), 653 states have internal predecessors, (659), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:25:21,475 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:25:21,476 INFO L93 Difference]: Finished difference Result 308 states and 311 transitions. [2024-11-14 04:25:21,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 253 states. [2024-11-14 04:25:21,478 INFO L78 Accepts]: Start accepts. Automaton has has 654 states, 654 states have (on average 1.007645259938838) internal successors, (659), 653 states have internal predecessors, (659), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 253 [2024-11-14 04:25:21,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:25:21,480 INFO L225 Difference]: With dead ends: 308 [2024-11-14 04:25:21,480 INFO L226 Difference]: Without dead ends: 256 [2024-11-14 04:25:21,493 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 961 GetRequests, 304 SyntacticMatches, 0 SemanticMatches, 657 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 202170 ImplicationChecksByTransitivity, 125.0s TimeCoverageRelationStatistics Valid=163573, Invalid=270049, Unknown=0, NotChecked=0, Total=433622 [2024-11-14 04:25:21,493 INFO L432 NwaCegarLoop]: 2 mSDtfsCounter, 0 mSDsluCounter, 404 mSDsCounter, 0 mSdLazyCounter, 598 mSolverCounterSat, 308 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 406 SdHoareTripleChecker+Invalid, 906 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 308 IncrementalHoareTripleChecker+Valid, 598 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2024-11-14 04:25:21,494 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 406 Invalid, 906 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [308 Valid, 598 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2024-11-14 04:25:21,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 256 states. [2024-11-14 04:25:21,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 256 to 256. [2024-11-14 04:25:21,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 256 states, 255 states have (on average 1.007843137254902) internal successors, (257), 255 states have internal predecessors, (257), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:25:21,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 256 states to 256 states and 257 transitions. [2024-11-14 04:25:21,533 INFO L78 Accepts]: Start accepts. Automaton has 256 states and 257 transitions. Word has length 253 [2024-11-14 04:25:21,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:25:21,533 INFO L471 AbstractCegarLoop]: Abstraction has 256 states and 257 transitions. [2024-11-14 04:25:21,534 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 654 states, 654 states have (on average 1.007645259938838) internal successors, (659), 653 states have internal predecessors, (659), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:25:21,534 INFO L276 IsEmpty]: Start isEmpty. Operand 256 states and 257 transitions. [2024-11-14 04:25:21,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 256 [2024-11-14 04:25:21,537 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:25:21,538 INFO L215 NwaCegarLoop]: trace histogram [201, 49, 1, 1, 1, 1, 1] [2024-11-14 04:25:21,568 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67869a4d-d229-4cb0-9819-bbb32311f7a0/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2024-11-14 04:25:21,738 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67869a4d-d229-4cb0-9819-bbb32311f7a0/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2024-11-14 04:25:21,738 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 04:25:21,739 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:25:21,739 INFO L85 PathProgramCache]: Analyzing trace with hash 12270626, now seen corresponding path program 13 times [2024-11-14 04:25:21,739 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:25:21,739 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1974500473] [2024-11-14 04:25:21,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:25:21,739 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:25:22,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:26:37,371 INFO L134 CoverageAnalysis]: Checked inductivity of 21526 backedges. 0 proven. 20301 refuted. 0 times theorem prover too weak. 1225 trivial. 0 not checked. [2024-11-14 04:26:37,371 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:26:37,371 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1974500473] [2024-11-14 04:26:37,371 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1974500473] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 04:26:37,371 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [824602621] [2024-11-14 04:26:37,371 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-14 04:26:37,371 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:26:37,371 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67869a4d-d229-4cb0-9819-bbb32311f7a0/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 04:26:37,375 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67869a4d-d229-4cb0-9819-bbb32311f7a0/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 04:26:37,379 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67869a4d-d229-4cb0-9819-bbb32311f7a0/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-11-14 04:26:39,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:26:39,078 INFO L255 TraceCheckSpWp]: Trace formula consists of 681 conjuncts, 203 conjuncts are in the unsatisfiable core [2024-11-14 04:26:39,129 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 04:26:39,676 INFO L134 CoverageAnalysis]: Checked inductivity of 21526 backedges. 0 proven. 20301 refuted. 0 times theorem prover too weak. 1225 trivial. 0 not checked. [2024-11-14 04:26:39,676 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 04:27:45,732 INFO L134 CoverageAnalysis]: Checked inductivity of 21526 backedges. 0 proven. 20301 refuted. 0 times theorem prover too weak. 1225 trivial. 0 not checked. [2024-11-14 04:27:45,732 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [824602621] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 04:27:45,732 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [472102408] [2024-11-14 04:27:45,733 INFO L159 IcfgInterpreter]: Started Sifa with 6 locations of interest [2024-11-14 04:27:45,734 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 04:27:45,734 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 04:27:45,734 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 04:27:45,734 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 04:27:45,788 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 04:27:46,164 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '14732#(<= 1 |#StackHeapBarrier|)' at error location [2024-11-14 04:27:46,164 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 04:27:46,164 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 04:27:46,164 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [203, 203, 203] total 406 [2024-11-14 04:27:46,165 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [303566342] [2024-11-14 04:27:46,165 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 04:27:46,166 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 407 states [2024-11-14 04:27:46,166 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 04:27:46,179 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 407 interpolants. [2024-11-14 04:27:46,187 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82629, Invalid=85061, Unknown=0, NotChecked=0, Total=167690 [2024-11-14 04:27:46,188 INFO L87 Difference]: Start difference. First operand 256 states and 257 transitions. Second operand has 407 states, 407 states have (on average 1.0122850122850122) internal successors, (412), 406 states have internal predecessors, (412), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:27:49,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:27:49,003 INFO L93 Difference]: Finished difference Result 512 states and 716 transitions. [2024-11-14 04:27:49,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 406 states. [2024-11-14 04:27:49,004 INFO L78 Accepts]: Start accepts. Automaton has has 407 states, 407 states have (on average 1.0122850122850122) internal successors, (412), 406 states have internal predecessors, (412), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 255 [2024-11-14 04:27:49,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:27:49,007 INFO L225 Difference]: With dead ends: 512 [2024-11-14 04:27:49,008 INFO L226 Difference]: Without dead ends: 459 [2024-11-14 04:27:49,018 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 966 GetRequests, 558 SyntacticMatches, 0 SemanticMatches, 408 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2622 ImplicationChecksByTransitivity, 83.5s TimeCoverageRelationStatistics Valid=82629, Invalid=85061, Unknown=0, NotChecked=0, Total=167690 [2024-11-14 04:27:49,019 INFO L432 NwaCegarLoop]: 3 mSDtfsCounter, 0 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 426 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 15 SdHoareTripleChecker+Invalid, 427 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 426 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-14 04:27:49,019 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 15 Invalid, 427 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 426 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-11-14 04:27:49,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 459 states. [2024-11-14 04:27:49,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 459 to 459. [2024-11-14 04:27:49,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 459 states, 458 states have (on average 1.0043668122270741) internal successors, (460), 458 states have internal predecessors, (460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:27:49,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 459 states to 459 states and 460 transitions. [2024-11-14 04:27:49,178 INFO L78 Accepts]: Start accepts. Automaton has 459 states and 460 transitions. Word has length 255 [2024-11-14 04:27:49,179 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:27:49,179 INFO L471 AbstractCegarLoop]: Abstraction has 459 states and 460 transitions. [2024-11-14 04:27:49,180 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 407 states, 407 states have (on average 1.0122850122850122) internal successors, (412), 406 states have internal predecessors, (412), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:27:49,180 INFO L276 IsEmpty]: Start isEmpty. Operand 459 states and 460 transitions. [2024-11-14 04:27:49,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 459 [2024-11-14 04:27:49,191 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:27:49,191 INFO L215 NwaCegarLoop]: trace histogram [404, 49, 1, 1, 1, 1, 1] [2024-11-14 04:27:49,225 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67869a4d-d229-4cb0-9819-bbb32311f7a0/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2024-11-14 04:27:49,392 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67869a4d-d229-4cb0-9819-bbb32311f7a0/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2024-11-14 04:27:49,392 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 04:27:49,392 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:27:49,393 INFO L85 PathProgramCache]: Analyzing trace with hash 651054877, now seen corresponding path program 14 times [2024-11-14 04:27:49,393 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:27:49,393 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1186870050] [2024-11-14 04:27:49,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:27:49,393 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:27:59,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:33:55,804 INFO L134 CoverageAnalysis]: Checked inductivity of 83035 backedges. 0 proven. 81810 refuted. 0 times theorem prover too weak. 1225 trivial. 0 not checked. [2024-11-14 04:33:55,805 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:33:55,805 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1186870050] [2024-11-14 04:33:55,805 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1186870050] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 04:33:55,805 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1425950529] [2024-11-14 04:33:55,805 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-14 04:33:55,805 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:33:55,805 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67869a4d-d229-4cb0-9819-bbb32311f7a0/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 04:33:55,807 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67869a4d-d229-4cb0-9819-bbb32311f7a0/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 04:33:55,807 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67869a4d-d229-4cb0-9819-bbb32311f7a0/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process