./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/eca-rers2012/Problem03_label31.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_60497fba-68fb-4449-b16c-e9c86cde5c02/bin/utaipan-verify-sOmjnqqW8E/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60497fba-68fb-4449-b16c-e9c86cde5c02/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_60497fba-68fb-4449-b16c-e9c86cde5c02/bin/utaipan-verify-sOmjnqqW8E/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60497fba-68fb-4449-b16c-e9c86cde5c02/bin/utaipan-verify-sOmjnqqW8E/config/TaipanReach.xml -i ../../sv-benchmarks/c/eca-rers2012/Problem03_label31.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60497fba-68fb-4449-b16c-e9c86cde5c02/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_60497fba-68fb-4449-b16c-e9c86cde5c02/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 0f24c408f41095e30eafeb1a084d204fc8ef13a530aced92918a05abf66b230d --- Real Ultimate output --- This is Ultimate 0.3.0-dev-826ab2b [2024-11-14 03:31:13,866 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-14 03:31:13,948 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60497fba-68fb-4449-b16c-e9c86cde5c02/bin/utaipan-verify-sOmjnqqW8E/config/svcomp-Reach-32bit-Taipan_Default.epf [2024-11-14 03:31:13,954 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-14 03:31:13,954 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-14 03:31:13,991 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-14 03:31:13,992 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-14 03:31:13,992 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-14 03:31:13,992 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-14 03:31:13,993 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-14 03:31:13,993 INFO L153 SettingsManager]: * User list type=DISABLED [2024-11-14 03:31:13,993 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2024-11-14 03:31:13,993 INFO L153 SettingsManager]: * Explicit value domain=true [2024-11-14 03:31:13,994 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2024-11-14 03:31:13,994 INFO L153 SettingsManager]: * Octagon Domain=false [2024-11-14 03:31:13,995 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2024-11-14 03:31:13,995 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2024-11-14 03:31:13,995 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2024-11-14 03:31:13,995 INFO L153 SettingsManager]: * Interval Domain=false [2024-11-14 03:31:13,995 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2024-11-14 03:31:13,995 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2024-11-14 03:31:13,995 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2024-11-14 03:31:13,996 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-14 03:31:13,996 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-14 03:31:13,996 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-14 03:31:13,996 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-14 03:31:13,996 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-14 03:31:13,996 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-14 03:31:13,996 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-14 03:31:13,996 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-14 03:31:13,996 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-14 03:31:13,996 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-14 03:31:13,997 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-14 03:31:13,997 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-14 03:31:13,997 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-14 03:31:13,997 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-14 03:31:13,997 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-14 03:31:13,997 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-14 03:31:13,997 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2024-11-14 03:31:13,997 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-14 03:31:13,997 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-14 03:31:13,998 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-14 03:31:13,998 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2024-11-14 03:31:13,998 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-14 03:31:13,998 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-14 03:31:13,998 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2024-11-14 03:31:13,999 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-14 03:31:13,999 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_60497fba-68fb-4449-b16c-e9c86cde5c02/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 -> 0f24c408f41095e30eafeb1a084d204fc8ef13a530aced92918a05abf66b230d [2024-11-14 03:31:14,330 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-14 03:31:14,340 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-14 03:31:14,343 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-14 03:31:14,345 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-14 03:31:14,346 INFO L274 PluginConnector]: CDTParser initialized [2024-11-14 03:31:14,347 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60497fba-68fb-4449-b16c-e9c86cde5c02/bin/utaipan-verify-sOmjnqqW8E/../../sv-benchmarks/c/eca-rers2012/Problem03_label31.c Unable to find full path for "g++" [2024-11-14 03:31:16,256 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-14 03:31:16,709 INFO L384 CDTParser]: Found 1 translation units. [2024-11-14 03:31:16,712 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60497fba-68fb-4449-b16c-e9c86cde5c02/sv-benchmarks/c/eca-rers2012/Problem03_label31.c [2024-11-14 03:31:16,730 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60497fba-68fb-4449-b16c-e9c86cde5c02/bin/utaipan-verify-sOmjnqqW8E/data/562c8b43a/8a4b340569d74f15ad2e78a6954daf00/FLAG7640bb055 [2024-11-14 03:31:16,826 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60497fba-68fb-4449-b16c-e9c86cde5c02/bin/utaipan-verify-sOmjnqqW8E/data/562c8b43a/8a4b340569d74f15ad2e78a6954daf00 [2024-11-14 03:31:16,830 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-14 03:31:16,831 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-14 03:31:16,834 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-14 03:31:16,834 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-14 03:31:16,839 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-14 03:31:16,840 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.11 03:31:16" (1/1) ... [2024-11-14 03:31:16,841 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@505cd523 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 03:31:16, skipping insertion in model container [2024-11-14 03:31:16,842 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.11 03:31:16" (1/1) ... [2024-11-14 03:31:16,923 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-14 03:31:17,489 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_60497fba-68fb-4449-b16c-e9c86cde5c02/sv-benchmarks/c/eca-rers2012/Problem03_label31.c[54594,54607] [2024-11-14 03:31:17,533 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-14 03:31:17,547 INFO L200 MainTranslator]: Completed pre-run [2024-11-14 03:31:17,778 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_60497fba-68fb-4449-b16c-e9c86cde5c02/sv-benchmarks/c/eca-rers2012/Problem03_label31.c[54594,54607] [2024-11-14 03:31:17,804 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-14 03:31:17,831 INFO L204 MainTranslator]: Completed translation [2024-11-14 03:31:17,832 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 03:31:17 WrapperNode [2024-11-14 03:31:17,833 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-14 03:31:17,834 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-14 03:31:17,835 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-14 03:31:17,835 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-14 03:31:17,843 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 03:31:17" (1/1) ... [2024-11-14 03:31:17,883 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 03:31:17" (1/1) ... [2024-11-14 03:31:18,016 INFO L138 Inliner]: procedures = 14, calls = 8, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 1771 [2024-11-14 03:31:18,017 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-14 03:31:18,017 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-14 03:31:18,017 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-14 03:31:18,017 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-14 03:31:18,025 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 03:31:17" (1/1) ... [2024-11-14 03:31:18,025 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 03:31:17" (1/1) ... [2024-11-14 03:31:18,046 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 03:31:17" (1/1) ... [2024-11-14 03:31:18,046 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 03:31:17" (1/1) ... [2024-11-14 03:31:18,119 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 03:31:17" (1/1) ... [2024-11-14 03:31:18,143 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 03:31:17" (1/1) ... [2024-11-14 03:31:18,153 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 03:31:17" (1/1) ... [2024-11-14 03:31:18,165 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 03:31:17" (1/1) ... [2024-11-14 03:31:18,176 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-14 03:31:18,176 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-14 03:31:18,177 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-14 03:31:18,177 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-14 03:31:18,179 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 03:31:17" (1/1) ... [2024-11-14 03:31:18,188 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2024-11-14 03:31:18,201 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60497fba-68fb-4449-b16c-e9c86cde5c02/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 03:31:18,218 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60497fba-68fb-4449-b16c-e9c86cde5c02/bin/utaipan-verify-sOmjnqqW8E/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2024-11-14 03:31:18,226 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60497fba-68fb-4449-b16c-e9c86cde5c02/bin/utaipan-verify-sOmjnqqW8E/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2024-11-14 03:31:18,251 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-14 03:31:18,253 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2024-11-14 03:31:18,253 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-14 03:31:18,253 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-14 03:31:18,364 INFO L238 CfgBuilder]: Building ICFG [2024-11-14 03:31:18,366 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-14 03:31:20,959 INFO L? ?]: Removed 147 outVars from TransFormulas that were not future-live. [2024-11-14 03:31:20,959 INFO L287 CfgBuilder]: Performing block encoding [2024-11-14 03:31:21,448 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-14 03:31:21,448 INFO L316 CfgBuilder]: Removed 1 assume(true) statements. [2024-11-14 03:31:21,449 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.11 03:31:21 BoogieIcfgContainer [2024-11-14 03:31:21,449 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-14 03:31:21,452 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-14 03:31:21,452 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-14 03:31:21,458 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-14 03:31:21,458 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.11 03:31:16" (1/3) ... [2024-11-14 03:31:21,459 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@771819f6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.11 03:31:21, skipping insertion in model container [2024-11-14 03:31:21,459 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 03:31:17" (2/3) ... [2024-11-14 03:31:21,459 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@771819f6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.11 03:31:21, skipping insertion in model container [2024-11-14 03:31:21,459 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.11 03:31:21" (3/3) ... [2024-11-14 03:31:21,462 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem03_label31.c [2024-11-14 03:31:21,479 INFO L217 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-14 03:31:21,483 INFO L154 ceAbstractionStarter]: Applying trace abstraction to ICFG Problem03_label31.c that has 1 procedures, 148 locations, 1 initial locations, 1 loop locations, and 1 error locations. [2024-11-14 03:31:21,560 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-14 03:31:21,576 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;@25c78782, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-14 03:31:21,576 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-11-14 03:31:21,583 INFO L276 IsEmpty]: Start isEmpty. Operand has 148 states, 146 states have (on average 1.9726027397260273) internal successors, (288), 147 states have internal predecessors, (288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 03:31:21,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2024-11-14 03:31:21,598 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:31:21,599 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 03:31:21,599 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 03:31:21,605 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:31:21,605 INFO L85 PathProgramCache]: Analyzing trace with hash -1934956272, now seen corresponding path program 1 times [2024-11-14 03:31:21,613 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:31:21,614 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [650179265] [2024-11-14 03:31:21,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:31:21,615 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:31:22,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:31:22,917 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 03:31:22,919 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:31:22,919 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [650179265] [2024-11-14 03:31:22,920 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [650179265] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 03:31:22,920 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-14 03:31:22,920 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-14 03:31:22,922 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1609581819] [2024-11-14 03:31:22,925 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 03:31:22,931 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-14 03:31:22,931 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:31:22,956 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-14 03:31:22,957 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-14 03:31:22,960 INFO L87 Difference]: Start difference. First operand has 148 states, 146 states have (on average 1.9726027397260273) internal successors, (288), 147 states have internal predecessors, (288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 47.666666666666664) internal successors, (143), 2 states have internal predecessors, (143), 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 03:31:24,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:31:24,121 INFO L93 Difference]: Finished difference Result 440 states and 860 transitions. [2024-11-14 03:31:24,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-14 03:31:24,124 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 47.666666666666664) internal successors, (143), 2 states have internal predecessors, (143), 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 143 [2024-11-14 03:31:24,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:31:24,139 INFO L225 Difference]: With dead ends: 440 [2024-11-14 03:31:24,139 INFO L226 Difference]: Without dead ends: 289 [2024-11-14 03:31:24,142 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-14 03:31:24,145 INFO L432 NwaCegarLoop]: 42 mSDtfsCounter, 38 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 508 mSolverCounterSat, 70 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 578 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 70 IncrementalHoareTripleChecker+Valid, 508 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2024-11-14 03:31:24,146 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [38 Valid, 47 Invalid, 578 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [70 Valid, 508 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2024-11-14 03:31:24,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 289 states. [2024-11-14 03:31:24,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 289 to 289. [2024-11-14 03:31:24,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 289 states, 288 states have (on average 1.8055555555555556) internal successors, (520), 288 states have internal predecessors, (520), 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 03:31:24,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 289 states to 289 states and 520 transitions. [2024-11-14 03:31:24,220 INFO L78 Accepts]: Start accepts. Automaton has 289 states and 520 transitions. Word has length 143 [2024-11-14 03:31:24,221 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:31:24,221 INFO L471 AbstractCegarLoop]: Abstraction has 289 states and 520 transitions. [2024-11-14 03:31:24,221 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 47.666666666666664) internal successors, (143), 2 states have internal predecessors, (143), 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 03:31:24,221 INFO L276 IsEmpty]: Start isEmpty. Operand 289 states and 520 transitions. [2024-11-14 03:31:24,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2024-11-14 03:31:24,228 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:31:24,228 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 03:31:24,229 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-14 03:31:24,229 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 03:31:24,229 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:31:24,230 INFO L85 PathProgramCache]: Analyzing trace with hash -37357529, now seen corresponding path program 1 times [2024-11-14 03:31:24,230 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:31:24,230 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1102833829] [2024-11-14 03:31:24,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:31:24,230 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:31:24,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:31:24,649 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 03:31:24,649 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:31:24,649 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1102833829] [2024-11-14 03:31:24,649 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1102833829] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 03:31:24,649 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-14 03:31:24,649 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-14 03:31:24,649 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1013224073] [2024-11-14 03:31:24,650 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 03:31:24,651 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-14 03:31:24,651 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:31:24,652 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-14 03:31:24,652 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-14 03:31:24,652 INFO L87 Difference]: Start difference. First operand 289 states and 520 transitions. Second operand has 3 states, 3 states have (on average 49.333333333333336) internal successors, (148), 2 states have internal predecessors, (148), 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 03:31:25,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:31:25,672 INFO L93 Difference]: Finished difference Result 863 states and 1557 transitions. [2024-11-14 03:31:25,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-14 03:31:25,674 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 49.333333333333336) internal successors, (148), 2 states have internal predecessors, (148), 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 148 [2024-11-14 03:31:25,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:31:25,677 INFO L225 Difference]: With dead ends: 863 [2024-11-14 03:31:25,679 INFO L226 Difference]: Without dead ends: 575 [2024-11-14 03:31:25,680 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-14 03:31:25,682 INFO L432 NwaCegarLoop]: 64 mSDtfsCounter, 164 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 504 mSolverCounterSat, 92 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 164 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 596 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 92 IncrementalHoareTripleChecker+Valid, 504 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2024-11-14 03:31:25,683 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [164 Valid, 68 Invalid, 596 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [92 Valid, 504 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2024-11-14 03:31:25,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 575 states. [2024-11-14 03:31:25,722 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 575 to 575. [2024-11-14 03:31:25,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 575 states, 574 states have (on average 1.6724738675958188) internal successors, (960), 574 states have internal predecessors, (960), 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 03:31:25,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 575 states to 575 states and 960 transitions. [2024-11-14 03:31:25,730 INFO L78 Accepts]: Start accepts. Automaton has 575 states and 960 transitions. Word has length 148 [2024-11-14 03:31:25,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:31:25,731 INFO L471 AbstractCegarLoop]: Abstraction has 575 states and 960 transitions. [2024-11-14 03:31:25,731 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 49.333333333333336) internal successors, (148), 2 states have internal predecessors, (148), 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 03:31:25,733 INFO L276 IsEmpty]: Start isEmpty. Operand 575 states and 960 transitions. [2024-11-14 03:31:25,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2024-11-14 03:31:25,740 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:31:25,740 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 03:31:25,741 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-14 03:31:25,741 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 03:31:25,741 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:31:25,741 INFO L85 PathProgramCache]: Analyzing trace with hash 588534831, now seen corresponding path program 1 times [2024-11-14 03:31:25,741 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:31:25,741 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1332395400] [2024-11-14 03:31:25,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:31:25,742 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:31:25,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:31:25,989 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 03:31:25,989 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:31:25,989 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1332395400] [2024-11-14 03:31:25,989 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1332395400] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 03:31:25,989 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-14 03:31:25,989 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-14 03:31:25,991 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2133433191] [2024-11-14 03:31:25,992 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 03:31:25,992 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-14 03:31:25,992 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:31:25,993 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-14 03:31:25,993 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-14 03:31:25,993 INFO L87 Difference]: Start difference. First operand 575 states and 960 transitions. Second operand has 3 states, 3 states have (on average 50.333333333333336) internal successors, (151), 2 states have internal predecessors, (151), 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 03:31:27,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:31:27,002 INFO L93 Difference]: Finished difference Result 1721 states and 2877 transitions. [2024-11-14 03:31:27,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-14 03:31:27,002 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 50.333333333333336) internal successors, (151), 2 states have internal predecessors, (151), 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 151 [2024-11-14 03:31:27,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:31:27,007 INFO L225 Difference]: With dead ends: 1721 [2024-11-14 03:31:27,008 INFO L226 Difference]: Without dead ends: 1147 [2024-11-14 03:31:27,009 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-14 03:31:27,010 INFO L432 NwaCegarLoop]: 20 mSDtfsCounter, 159 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 452 mSolverCounterSat, 170 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 159 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 622 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 170 IncrementalHoareTripleChecker+Valid, 452 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2024-11-14 03:31:27,010 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [159 Valid, 23 Invalid, 622 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [170 Valid, 452 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2024-11-14 03:31:27,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1147 states. [2024-11-14 03:31:27,036 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1147 to 1147. [2024-11-14 03:31:27,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1147 states, 1146 states have (on average 1.6265270506108203) internal successors, (1864), 1146 states have internal predecessors, (1864), 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 03:31:27,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1147 states to 1147 states and 1864 transitions. [2024-11-14 03:31:27,044 INFO L78 Accepts]: Start accepts. Automaton has 1147 states and 1864 transitions. Word has length 151 [2024-11-14 03:31:27,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:31:27,045 INFO L471 AbstractCegarLoop]: Abstraction has 1147 states and 1864 transitions. [2024-11-14 03:31:27,045 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 50.333333333333336) internal successors, (151), 2 states have internal predecessors, (151), 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 03:31:27,045 INFO L276 IsEmpty]: Start isEmpty. Operand 1147 states and 1864 transitions. [2024-11-14 03:31:27,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2024-11-14 03:31:27,049 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:31:27,049 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 03:31:27,049 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-11-14 03:31:27,049 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 03:31:27,050 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:31:27,050 INFO L85 PathProgramCache]: Analyzing trace with hash -1401654207, now seen corresponding path program 1 times [2024-11-14 03:31:27,050 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:31:27,050 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [822709947] [2024-11-14 03:31:27,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:31:27,050 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:31:27,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:31:27,574 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 8 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 03:31:27,574 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:31:27,575 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [822709947] [2024-11-14 03:31:27,575 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [822709947] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 03:31:27,575 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1827134007] [2024-11-14 03:31:27,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:31:27,576 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:31:27,576 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60497fba-68fb-4449-b16c-e9c86cde5c02/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 03:31:27,580 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60497fba-68fb-4449-b16c-e9c86cde5c02/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 03:31:27,582 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60497fba-68fb-4449-b16c-e9c86cde5c02/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-14 03:31:27,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:31:27,771 INFO L255 TraceCheckSpWp]: Trace formula consists of 370 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-11-14 03:31:27,783 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 03:31:28,069 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-14 03:31:28,069 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-14 03:31:28,069 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1827134007] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 03:31:28,069 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-14 03:31:28,069 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2024-11-14 03:31:28,070 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [461449801] [2024-11-14 03:31:28,070 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 03:31:28,070 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-14 03:31:28,071 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:31:28,071 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-14 03:31:28,071 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-14 03:31:28,072 INFO L87 Difference]: Start difference. First operand 1147 states and 1864 transitions. Second operand has 3 states, 3 states have (on average 51.0) internal successors, (153), 3 states have internal predecessors, (153), 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 03:31:29,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:31:29,174 INFO L93 Difference]: Finished difference Result 3437 states and 5589 transitions. [2024-11-14 03:31:29,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-14 03:31:29,175 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 51.0) internal successors, (153), 3 states have internal predecessors, (153), 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 158 [2024-11-14 03:31:29,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:31:29,186 INFO L225 Difference]: With dead ends: 3437 [2024-11-14 03:31:29,186 INFO L226 Difference]: Without dead ends: 2291 [2024-11-14 03:31:29,188 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 158 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-14 03:31:29,189 INFO L432 NwaCegarLoop]: 256 mSDtfsCounter, 14 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 413 mSolverCounterSat, 162 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 260 SdHoareTripleChecker+Invalid, 575 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 162 IncrementalHoareTripleChecker+Valid, 413 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2024-11-14 03:31:29,189 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 260 Invalid, 575 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [162 Valid, 413 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2024-11-14 03:31:29,192 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2291 states. [2024-11-14 03:31:29,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2291 to 2291. [2024-11-14 03:31:29,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2291 states, 2290 states have (on average 1.4017467248908297) internal successors, (3210), 2290 states have internal predecessors, (3210), 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 03:31:29,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2291 states to 2291 states and 3210 transitions. [2024-11-14 03:31:29,266 INFO L78 Accepts]: Start accepts. Automaton has 2291 states and 3210 transitions. Word has length 158 [2024-11-14 03:31:29,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:31:29,267 INFO L471 AbstractCegarLoop]: Abstraction has 2291 states and 3210 transitions. [2024-11-14 03:31:29,267 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 51.0) internal successors, (153), 3 states have internal predecessors, (153), 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 03:31:29,267 INFO L276 IsEmpty]: Start isEmpty. Operand 2291 states and 3210 transitions. [2024-11-14 03:31:29,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 177 [2024-11-14 03:31:29,273 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:31:29,274 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 03:31:29,295 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60497fba-68fb-4449-b16c-e9c86cde5c02/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-14 03:31:29,484 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60497fba-68fb-4449-b16c-e9c86cde5c02/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:31:29,484 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 03:31:29,488 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:31:29,489 INFO L85 PathProgramCache]: Analyzing trace with hash -88254238, now seen corresponding path program 1 times [2024-11-14 03:31:29,489 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:31:29,489 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [568103965] [2024-11-14 03:31:29,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:31:29,489 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:31:29,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:31:29,754 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 32 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2024-11-14 03:31:29,755 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:31:29,755 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [568103965] [2024-11-14 03:31:29,755 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [568103965] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 03:31:29,755 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-14 03:31:29,755 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-14 03:31:29,755 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [178878713] [2024-11-14 03:31:29,755 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 03:31:29,756 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-14 03:31:29,756 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:31:29,757 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-14 03:31:29,757 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-14 03:31:29,757 INFO L87 Difference]: Start difference. First operand 2291 states and 3210 transitions. Second operand has 3 states, 3 states have (on average 54.666666666666664) internal successors, (164), 2 states have internal predecessors, (164), 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 03:31:30,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:31:30,293 INFO L93 Difference]: Finished difference Result 4581 states and 6419 transitions. [2024-11-14 03:31:30,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-14 03:31:30,294 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 54.666666666666664) internal successors, (164), 2 states have internal predecessors, (164), 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 176 [2024-11-14 03:31:30,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:31:30,302 INFO L225 Difference]: With dead ends: 4581 [2024-11-14 03:31:30,302 INFO L226 Difference]: Without dead ends: 2291 [2024-11-14 03:31:30,306 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-14 03:31:30,307 INFO L432 NwaCegarLoop]: 4 mSDtfsCounter, 240 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 265 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 240 SdHoareTripleChecker+Valid, 4 SdHoareTripleChecker+Invalid, 288 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 265 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-11-14 03:31:30,307 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [240 Valid, 4 Invalid, 288 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 265 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-11-14 03:31:30,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2291 states. [2024-11-14 03:31:30,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2291 to 2291. [2024-11-14 03:31:30,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2291 states, 2290 states have (on average 1.3615720524017467) internal successors, (3118), 2290 states have internal predecessors, (3118), 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 03:31:30,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2291 states to 2291 states and 3118 transitions. [2024-11-14 03:31:30,371 INFO L78 Accepts]: Start accepts. Automaton has 2291 states and 3118 transitions. Word has length 176 [2024-11-14 03:31:30,372 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:31:30,372 INFO L471 AbstractCegarLoop]: Abstraction has 2291 states and 3118 transitions. [2024-11-14 03:31:30,372 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 54.666666666666664) internal successors, (164), 2 states have internal predecessors, (164), 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 03:31:30,372 INFO L276 IsEmpty]: Start isEmpty. Operand 2291 states and 3118 transitions. [2024-11-14 03:31:30,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 185 [2024-11-14 03:31:30,378 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:31:30,378 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 03:31:30,378 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-11-14 03:31:30,379 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 03:31:30,380 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:31:30,380 INFO L85 PathProgramCache]: Analyzing trace with hash -267849178, now seen corresponding path program 1 times [2024-11-14 03:31:30,380 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:31:30,380 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [659559455] [2024-11-14 03:31:30,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:31:30,381 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:31:30,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:31:30,962 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 40 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 03:31:30,964 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:31:30,965 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [659559455] [2024-11-14 03:31:30,965 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [659559455] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 03:31:30,965 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-14 03:31:30,965 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-14 03:31:30,965 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1517838208] [2024-11-14 03:31:30,965 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 03:31:30,966 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-14 03:31:30,966 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:31:30,967 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-14 03:31:30,967 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-14 03:31:30,967 INFO L87 Difference]: Start difference. First operand 2291 states and 3118 transitions. Second operand has 3 states, 3 states have (on average 61.333333333333336) internal successors, (184), 2 states have internal predecessors, (184), 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 03:31:31,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:31:31,893 INFO L93 Difference]: Finished difference Result 5727 states and 7764 transitions. [2024-11-14 03:31:31,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-14 03:31:31,894 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 61.333333333333336) internal successors, (184), 2 states have internal predecessors, (184), 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 184 [2024-11-14 03:31:31,894 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:31:31,906 INFO L225 Difference]: With dead ends: 5727 [2024-11-14 03:31:31,906 INFO L226 Difference]: Without dead ends: 3437 [2024-11-14 03:31:31,909 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-14 03:31:31,910 INFO L432 NwaCegarLoop]: 76 mSDtfsCounter, 118 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 537 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 118 SdHoareTripleChecker+Valid, 80 SdHoareTripleChecker+Invalid, 570 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 537 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2024-11-14 03:31:31,910 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [118 Valid, 80 Invalid, 570 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 537 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2024-11-14 03:31:31,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3437 states. [2024-11-14 03:31:31,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3437 to 3435. [2024-11-14 03:31:31,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3435 states, 3434 states have (on average 1.3389633080955154) internal successors, (4598), 3434 states have internal predecessors, (4598), 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 03:31:31,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3435 states to 3435 states and 4598 transitions. [2024-11-14 03:31:31,999 INFO L78 Accepts]: Start accepts. Automaton has 3435 states and 4598 transitions. Word has length 184 [2024-11-14 03:31:31,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:31:31,999 INFO L471 AbstractCegarLoop]: Abstraction has 3435 states and 4598 transitions. [2024-11-14 03:31:32,000 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 61.333333333333336) internal successors, (184), 2 states have internal predecessors, (184), 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 03:31:32,000 INFO L276 IsEmpty]: Start isEmpty. Operand 3435 states and 4598 transitions. [2024-11-14 03:31:32,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 192 [2024-11-14 03:31:32,007 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:31:32,007 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 03:31:32,008 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-11-14 03:31:32,008 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 03:31:32,008 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:31:32,008 INFO L85 PathProgramCache]: Analyzing trace with hash 1466473556, now seen corresponding path program 1 times [2024-11-14 03:31:32,008 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:31:32,008 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [372160862] [2024-11-14 03:31:32,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:31:32,009 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:31:32,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:31:32,655 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 47 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 03:31:32,655 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:31:32,655 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [372160862] [2024-11-14 03:31:32,655 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [372160862] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 03:31:32,656 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [407673093] [2024-11-14 03:31:32,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:31:32,656 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:31:32,656 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60497fba-68fb-4449-b16c-e9c86cde5c02/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 03:31:32,658 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60497fba-68fb-4449-b16c-e9c86cde5c02/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 03:31:32,659 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60497fba-68fb-4449-b16c-e9c86cde5c02/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-14 03:31:32,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:31:32,845 INFO L255 TraceCheckSpWp]: Trace formula consists of 395 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-11-14 03:31:32,885 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 03:31:33,114 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 47 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-14 03:31:33,114 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-14 03:31:33,115 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [407673093] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 03:31:33,115 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-14 03:31:33,115 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2024-11-14 03:31:33,115 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2083712983] [2024-11-14 03:31:33,115 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 03:31:33,116 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-14 03:31:33,116 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:31:33,116 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-14 03:31:33,117 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-14 03:31:33,117 INFO L87 Difference]: Start difference. First operand 3435 states and 4598 transitions. Second operand has 3 states, 3 states have (on average 62.0) internal successors, (186), 3 states have internal predecessors, (186), 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 03:31:33,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:31:33,892 INFO L93 Difference]: Finished difference Result 9443 states and 12759 transitions. [2024-11-14 03:31:33,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-14 03:31:33,892 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 62.0) internal successors, (186), 3 states have internal predecessors, (186), 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 191 [2024-11-14 03:31:33,893 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:31:33,913 INFO L225 Difference]: With dead ends: 9443 [2024-11-14 03:31:33,913 INFO L226 Difference]: Without dead ends: 6152 [2024-11-14 03:31:33,918 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 193 GetRequests, 190 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-14 03:31:33,919 INFO L432 NwaCegarLoop]: 57 mSDtfsCounter, 12 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 478 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 73 SdHoareTripleChecker+Invalid, 523 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 478 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2024-11-14 03:31:33,920 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 73 Invalid, 523 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 478 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2024-11-14 03:31:33,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6152 states. [2024-11-14 03:31:34,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6152 to 5437. [2024-11-14 03:31:34,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5437 states, 5436 states have (on average 1.377299484915379) internal successors, (7487), 5436 states have internal predecessors, (7487), 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 03:31:34,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5437 states to 5437 states and 7487 transitions. [2024-11-14 03:31:34,083 INFO L78 Accepts]: Start accepts. Automaton has 5437 states and 7487 transitions. Word has length 191 [2024-11-14 03:31:34,084 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:31:34,084 INFO L471 AbstractCegarLoop]: Abstraction has 5437 states and 7487 transitions. [2024-11-14 03:31:34,084 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 62.0) internal successors, (186), 3 states have internal predecessors, (186), 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 03:31:34,085 INFO L276 IsEmpty]: Start isEmpty. Operand 5437 states and 7487 transitions. [2024-11-14 03:31:34,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 211 [2024-11-14 03:31:34,100 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:31:34,101 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 03:31:34,121 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60497fba-68fb-4449-b16c-e9c86cde5c02/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-11-14 03:31:34,301 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60497fba-68fb-4449-b16c-e9c86cde5c02/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2024-11-14 03:31:34,302 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 03:31:34,302 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:31:34,302 INFO L85 PathProgramCache]: Analyzing trace with hash 1914249824, now seen corresponding path program 1 times [2024-11-14 03:31:34,302 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:31:34,302 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [169508790] [2024-11-14 03:31:34,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:31:34,303 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:31:34,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:31:34,871 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 72 proven. 6 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2024-11-14 03:31:34,872 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:31:34,872 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [169508790] [2024-11-14 03:31:34,872 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [169508790] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 03:31:34,872 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1133869158] [2024-11-14 03:31:34,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:31:34,872 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:31:34,872 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60497fba-68fb-4449-b16c-e9c86cde5c02/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 03:31:34,874 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60497fba-68fb-4449-b16c-e9c86cde5c02/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 03:31:34,877 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60497fba-68fb-4449-b16c-e9c86cde5c02/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-14 03:31:35,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:31:35,085 INFO L255 TraceCheckSpWp]: Trace formula consists of 453 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-11-14 03:31:35,089 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 03:31:35,153 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 91 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-14 03:31:35,157 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-14 03:31:35,157 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1133869158] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 03:31:35,157 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-14 03:31:35,158 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2024-11-14 03:31:35,158 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [153232113] [2024-11-14 03:31:35,158 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 03:31:35,158 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-14 03:31:35,158 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:31:35,159 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-14 03:31:35,159 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2024-11-14 03:31:35,159 INFO L87 Difference]: Start difference. First operand 5437 states and 7487 transitions. Second operand has 3 states, 3 states have (on average 68.33333333333333) internal successors, (205), 3 states have internal predecessors, (205), 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 03:31:36,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:31:36,162 INFO L93 Difference]: Finished difference Result 13161 states and 18633 transitions. [2024-11-14 03:31:36,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-14 03:31:36,162 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 68.33333333333333) internal successors, (205), 3 states have internal predecessors, (205), 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 210 [2024-11-14 03:31:36,163 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:31:36,192 INFO L225 Difference]: With dead ends: 13161 [2024-11-14 03:31:36,192 INFO L226 Difference]: Without dead ends: 7868 [2024-11-14 03:31:36,198 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 212 GetRequests, 209 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2024-11-14 03:31:36,199 INFO L432 NwaCegarLoop]: 82 mSDtfsCounter, 137 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 376 mSolverCounterSat, 179 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 137 SdHoareTripleChecker+Valid, 85 SdHoareTripleChecker+Invalid, 555 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 179 IncrementalHoareTripleChecker+Valid, 376 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2024-11-14 03:31:36,200 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [137 Valid, 85 Invalid, 555 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [179 Valid, 376 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2024-11-14 03:31:36,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7868 states. [2024-11-14 03:31:36,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7868 to 7868. [2024-11-14 03:31:36,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7868 states, 7867 states have (on average 1.301004194737511) internal successors, (10235), 7867 states have internal predecessors, (10235), 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 03:31:36,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7868 states to 7868 states and 10235 transitions. [2024-11-14 03:31:36,470 INFO L78 Accepts]: Start accepts. Automaton has 7868 states and 10235 transitions. Word has length 210 [2024-11-14 03:31:36,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:31:36,471 INFO L471 AbstractCegarLoop]: Abstraction has 7868 states and 10235 transitions. [2024-11-14 03:31:36,471 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 68.33333333333333) internal successors, (205), 3 states have internal predecessors, (205), 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 03:31:36,471 INFO L276 IsEmpty]: Start isEmpty. Operand 7868 states and 10235 transitions. [2024-11-14 03:31:36,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 222 [2024-11-14 03:31:36,486 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:31:36,487 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 03:31:36,507 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60497fba-68fb-4449-b16c-e9c86cde5c02/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-11-14 03:31:36,687 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60497fba-68fb-4449-b16c-e9c86cde5c02/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:31:36,687 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 03:31:36,688 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:31:36,688 INFO L85 PathProgramCache]: Analyzing trace with hash 203455303, now seen corresponding path program 1 times [2024-11-14 03:31:36,688 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:31:36,688 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [367767261] [2024-11-14 03:31:36,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:31:36,688 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:31:36,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:31:38,336 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 77 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 03:31:38,338 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:31:38,338 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [367767261] [2024-11-14 03:31:38,338 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [367767261] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 03:31:38,339 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [364606326] [2024-11-14 03:31:38,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:31:38,339 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:31:38,339 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60497fba-68fb-4449-b16c-e9c86cde5c02/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 03:31:38,341 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60497fba-68fb-4449-b16c-e9c86cde5c02/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 03:31:38,344 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60497fba-68fb-4449-b16c-e9c86cde5c02/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-14 03:31:38,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:31:38,541 INFO L255 TraceCheckSpWp]: Trace formula consists of 412 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-11-14 03:31:38,551 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 03:31:38,921 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 83 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 03:31:38,922 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-14 03:31:38,922 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [364606326] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 03:31:38,922 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-14 03:31:38,923 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 6 [2024-11-14 03:31:38,923 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [651414896] [2024-11-14 03:31:38,923 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 03:31:38,923 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-14 03:31:38,924 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:31:38,924 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-14 03:31:38,924 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-11-14 03:31:38,925 INFO L87 Difference]: Start difference. First operand 7868 states and 10235 transitions. Second operand has 4 states, 4 states have (on average 55.25) internal successors, (221), 3 states have internal predecessors, (221), 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 03:31:40,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:31:40,221 INFO L93 Difference]: Finished difference Result 18023 states and 23183 transitions. [2024-11-14 03:31:40,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-14 03:31:40,221 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 55.25) internal successors, (221), 3 states have internal predecessors, (221), 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 221 [2024-11-14 03:31:40,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:31:40,265 INFO L225 Difference]: With dead ends: 18023 [2024-11-14 03:31:40,265 INFO L226 Difference]: Without dead ends: 10299 [2024-11-14 03:31:40,274 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 224 GetRequests, 219 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-11-14 03:31:40,276 INFO L432 NwaCegarLoop]: 82 mSDtfsCounter, 220 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 632 mSolverCounterSat, 135 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 220 SdHoareTripleChecker+Valid, 89 SdHoareTripleChecker+Invalid, 767 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 135 IncrementalHoareTripleChecker+Valid, 632 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2024-11-14 03:31:40,277 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [220 Valid, 89 Invalid, 767 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [135 Valid, 632 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2024-11-14 03:31:40,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10299 states. [2024-11-14 03:31:40,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10299 to 8583. [2024-11-14 03:31:40,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8583 states, 8582 states have (on average 1.2780237706828246) internal successors, (10968), 8582 states have internal predecessors, (10968), 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 03:31:40,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8583 states to 8583 states and 10968 transitions. [2024-11-14 03:31:40,469 INFO L78 Accepts]: Start accepts. Automaton has 8583 states and 10968 transitions. Word has length 221 [2024-11-14 03:31:40,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:31:40,469 INFO L471 AbstractCegarLoop]: Abstraction has 8583 states and 10968 transitions. [2024-11-14 03:31:40,469 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 55.25) internal successors, (221), 3 states have internal predecessors, (221), 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 03:31:40,470 INFO L276 IsEmpty]: Start isEmpty. Operand 8583 states and 10968 transitions. [2024-11-14 03:31:40,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 263 [2024-11-14 03:31:40,485 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:31:40,485 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 03:31:40,506 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60497fba-68fb-4449-b16c-e9c86cde5c02/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-11-14 03:31:40,685 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60497fba-68fb-4449-b16c-e9c86cde5c02/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:31:40,686 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 03:31:40,687 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:31:40,687 INFO L85 PathProgramCache]: Analyzing trace with hash 105967781, now seen corresponding path program 1 times [2024-11-14 03:31:40,687 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:31:40,687 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [944631990] [2024-11-14 03:31:40,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:31:40,687 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:31:40,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:31:40,911 INFO L134 CoverageAnalysis]: Checked inductivity of 140 backedges. 140 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 03:31:40,911 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:31:40,911 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [944631990] [2024-11-14 03:31:40,911 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [944631990] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 03:31:40,911 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-14 03:31:40,911 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-14 03:31:40,911 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [118322891] [2024-11-14 03:31:40,911 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 03:31:40,912 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-14 03:31:40,912 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:31:40,913 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-14 03:31:40,913 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-14 03:31:40,914 INFO L87 Difference]: Start difference. First operand 8583 states and 10968 transitions. Second operand has 3 states, 3 states have (on average 87.33333333333333) internal successors, (262), 3 states have internal predecessors, (262), 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 03:31:41,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:31:41,959 INFO L93 Difference]: Finished difference Result 18166 states and 23373 transitions. [2024-11-14 03:31:41,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-14 03:31:41,961 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 87.33333333333333) internal successors, (262), 3 states have internal predecessors, (262), 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 262 [2024-11-14 03:31:41,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:31:41,985 INFO L225 Difference]: With dead ends: 18166 [2024-11-14 03:31:41,985 INFO L226 Difference]: Without dead ends: 9727 [2024-11-14 03:31:41,993 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 03:31:41,993 INFO L432 NwaCegarLoop]: 205 mSDtfsCounter, 148 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 419 mSolverCounterSat, 128 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 148 SdHoareTripleChecker+Valid, 208 SdHoareTripleChecker+Invalid, 547 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 128 IncrementalHoareTripleChecker+Valid, 419 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2024-11-14 03:31:41,994 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [148 Valid, 208 Invalid, 547 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [128 Valid, 419 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2024-11-14 03:31:42,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9727 states. [2024-11-14 03:31:42,170 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9727 to 9441. [2024-11-14 03:31:42,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9441 states, 9440 states have (on average 1.240677966101695) internal successors, (11712), 9440 states have internal predecessors, (11712), 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 03:31:42,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9441 states to 9441 states and 11712 transitions. [2024-11-14 03:31:42,200 INFO L78 Accepts]: Start accepts. Automaton has 9441 states and 11712 transitions. Word has length 262 [2024-11-14 03:31:42,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:31:42,200 INFO L471 AbstractCegarLoop]: Abstraction has 9441 states and 11712 transitions. [2024-11-14 03:31:42,201 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 87.33333333333333) internal successors, (262), 3 states have internal predecessors, (262), 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 03:31:42,201 INFO L276 IsEmpty]: Start isEmpty. Operand 9441 states and 11712 transitions. [2024-11-14 03:31:42,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 272 [2024-11-14 03:31:42,217 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:31:42,217 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 03:31:42,217 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-11-14 03:31:42,217 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 03:31:42,218 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:31:42,219 INFO L85 PathProgramCache]: Analyzing trace with hash 691095540, now seen corresponding path program 1 times [2024-11-14 03:31:42,219 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:31:42,219 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1481779332] [2024-11-14 03:31:42,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:31:42,219 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:31:42,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:31:42,991 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 12 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 03:31:42,991 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:31:42,992 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1481779332] [2024-11-14 03:31:42,992 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1481779332] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 03:31:42,992 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1393820445] [2024-11-14 03:31:42,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:31:42,992 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:31:42,993 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60497fba-68fb-4449-b16c-e9c86cde5c02/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 03:31:42,995 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60497fba-68fb-4449-b16c-e9c86cde5c02/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 03:31:42,998 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60497fba-68fb-4449-b16c-e9c86cde5c02/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-14 03:31:43,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:31:43,214 INFO L255 TraceCheckSpWp]: Trace formula consists of 467 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-14 03:31:43,221 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 03:31:43,959 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 0 proven. 127 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-14 03:31:43,959 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 03:31:44,752 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 0 proven. 127 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-14 03:31:44,753 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1393820445] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 03:31:44,753 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1433493260] [2024-11-14 03:31:44,792 INFO L159 IcfgInterpreter]: Started Sifa with 145 locations of interest [2024-11-14 03:31:44,792 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 03:31:44,795 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 03:31:44,800 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 03:31:44,801 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 03:32:13,477 WARN L286 SmtUtils]: Spent 9.39s on a formula simplification that was a NOOP. DAG size: 868 (called from [L 210] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.BasicPredicateFactory.xJunctTerm) [2024-11-14 03:32:22,470 WARN L286 SmtUtils]: Spent 8.99s on a formula simplification that was a NOOP. DAG size: 868 (called from [L 210] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.BasicPredicateFactory.xJunctTerm) [2024-11-14 03:33:10,992 WARN L176 XnfTransformerHelper]: Simplifying disjunction of 13408 conjunctions. This might take some time... [2024-11-14 03:33:30,272 INFO L192 XnfTransformerHelper]: Simplified to disjunction of 13408 conjunctions. [2024-11-14 03:33:30,401 WARN L176 XnfTransformerHelper]: Simplifying disjunction of 13408 conjunctions. This might take some time... [2024-11-14 03:33:55,832 INFO L192 XnfTransformerHelper]: Simplified to disjunction of 13408 conjunctions. [2024-11-14 03:37:44,300 WARN L286 SmtUtils]: Spent 3.80m on a formula simplification that was a NOOP. DAG size: 3750 (called from [L 210] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.BasicPredicateFactory.xJunctTerm) [2024-11-14 03:41:11,956 WARN L286 SmtUtils]: Spent 3.46m on a formula simplification that was a NOOP. DAG size: 3750 (called from [L 210] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.BasicPredicateFactory.xJunctTerm)