./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/eca-rers2012/Problem03_label28.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_428ae638-b13a-42db-a03b-9534a794bc03/bin/utaipan-verify-sOmjnqqW8E/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_428ae638-b13a-42db-a03b-9534a794bc03/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_428ae638-b13a-42db-a03b-9534a794bc03/bin/utaipan-verify-sOmjnqqW8E/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_428ae638-b13a-42db-a03b-9534a794bc03/bin/utaipan-verify-sOmjnqqW8E/config/TaipanReach.xml -i ../../sv-benchmarks/c/eca-rers2012/Problem03_label28.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_428ae638-b13a-42db-a03b-9534a794bc03/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_428ae638-b13a-42db-a03b-9534a794bc03/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 480af262cda4397eeb9e570da47990ce157a2b110ec643ba069b0968d8ba36a6 --- Real Ultimate output --- This is Ultimate 0.3.0-dev-826ab2b [2024-11-14 03:56:35,381 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-14 03:56:35,480 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_428ae638-b13a-42db-a03b-9534a794bc03/bin/utaipan-verify-sOmjnqqW8E/config/svcomp-Reach-32bit-Taipan_Default.epf [2024-11-14 03:56:35,487 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-14 03:56:35,487 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-14 03:56:35,519 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-14 03:56:35,520 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-14 03:56:35,520 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-14 03:56:35,521 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-14 03:56:35,521 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-14 03:56:35,521 INFO L153 SettingsManager]: * User list type=DISABLED [2024-11-14 03:56:35,521 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2024-11-14 03:56:35,521 INFO L153 SettingsManager]: * Explicit value domain=true [2024-11-14 03:56:35,521 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2024-11-14 03:56:35,523 INFO L153 SettingsManager]: * Octagon Domain=false [2024-11-14 03:56:35,523 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2024-11-14 03:56:35,523 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2024-11-14 03:56:35,523 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2024-11-14 03:56:35,524 INFO L153 SettingsManager]: * Interval Domain=false [2024-11-14 03:56:35,524 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2024-11-14 03:56:35,524 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2024-11-14 03:56:35,524 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2024-11-14 03:56:35,525 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-14 03:56:35,525 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-14 03:56:35,525 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-14 03:56:35,525 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-14 03:56:35,526 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-14 03:56:35,526 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-14 03:56:35,526 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-14 03:56:35,526 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-14 03:56:35,526 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-14 03:56:35,526 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-14 03:56:35,526 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-14 03:56:35,526 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-14 03:56:35,527 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-14 03:56:35,527 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-14 03:56:35,527 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-14 03:56:35,527 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-14 03:56:35,527 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2024-11-14 03:56:35,527 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-14 03:56:35,527 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-14 03:56:35,528 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-14 03:56:35,528 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2024-11-14 03:56:35,528 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-14 03:56:35,528 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-14 03:56:35,528 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2024-11-14 03:56:35,528 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-14 03:56:35,528 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_428ae638-b13a-42db-a03b-9534a794bc03/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 -> 480af262cda4397eeb9e570da47990ce157a2b110ec643ba069b0968d8ba36a6 [2024-11-14 03:56:35,840 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-14 03:56:35,851 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-14 03:56:35,855 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-14 03:56:35,857 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-14 03:56:35,858 INFO L274 PluginConnector]: CDTParser initialized [2024-11-14 03:56:35,859 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_428ae638-b13a-42db-a03b-9534a794bc03/bin/utaipan-verify-sOmjnqqW8E/../../sv-benchmarks/c/eca-rers2012/Problem03_label28.c Unable to find full path for "g++" [2024-11-14 03:56:37,700 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-14 03:56:38,166 INFO L384 CDTParser]: Found 1 translation units. [2024-11-14 03:56:38,166 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_428ae638-b13a-42db-a03b-9534a794bc03/sv-benchmarks/c/eca-rers2012/Problem03_label28.c [2024-11-14 03:56:38,186 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_428ae638-b13a-42db-a03b-9534a794bc03/bin/utaipan-verify-sOmjnqqW8E/data/bdf731916/634f5887554b4ac497b292fddf252851/FLAGc2e77c60a [2024-11-14 03:56:38,206 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_428ae638-b13a-42db-a03b-9534a794bc03/bin/utaipan-verify-sOmjnqqW8E/data/bdf731916/634f5887554b4ac497b292fddf252851 [2024-11-14 03:56:38,208 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-14 03:56:38,210 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-14 03:56:38,212 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-14 03:56:38,212 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-14 03:56:38,215 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-14 03:56:38,216 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.11 03:56:38" (1/1) ... [2024-11-14 03:56:38,217 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@40196565 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 03:56:38, skipping insertion in model container [2024-11-14 03:56:38,217 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.11 03:56:38" (1/1) ... [2024-11-14 03:56:38,270 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-14 03:56:38,981 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_428ae638-b13a-42db-a03b-9534a794bc03/sv-benchmarks/c/eca-rers2012/Problem03_label28.c[54731,54744] [2024-11-14 03:56:39,038 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-14 03:56:39,052 INFO L200 MainTranslator]: Completed pre-run [2024-11-14 03:56:39,338 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_428ae638-b13a-42db-a03b-9534a794bc03/sv-benchmarks/c/eca-rers2012/Problem03_label28.c[54731,54744] [2024-11-14 03:56:39,364 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-14 03:56:39,395 INFO L204 MainTranslator]: Completed translation [2024-11-14 03:56:39,395 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 03:56:39 WrapperNode [2024-11-14 03:56:39,396 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-14 03:56:39,397 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-14 03:56:39,397 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-14 03:56:39,397 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-14 03:56:39,402 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 03:56:39" (1/1) ... [2024-11-14 03:56:39,427 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 03:56:39" (1/1) ... [2024-11-14 03:56:39,541 INFO L138 Inliner]: procedures = 14, calls = 8, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 1771 [2024-11-14 03:56:39,542 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-14 03:56:39,542 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-14 03:56:39,542 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-14 03:56:39,542 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-14 03:56:39,550 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 03:56:39" (1/1) ... [2024-11-14 03:56:39,550 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 03:56:39" (1/1) ... [2024-11-14 03:56:39,563 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 03:56:39" (1/1) ... [2024-11-14 03:56:39,563 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 03:56:39" (1/1) ... [2024-11-14 03:56:39,618 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 03:56:39" (1/1) ... [2024-11-14 03:56:39,629 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 03:56:39" (1/1) ... [2024-11-14 03:56:39,641 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 03:56:39" (1/1) ... [2024-11-14 03:56:39,652 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 03:56:39" (1/1) ... [2024-11-14 03:56:39,665 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-14 03:56:39,667 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-14 03:56:39,667 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-14 03:56:39,667 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-14 03:56:39,668 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 03:56:39" (1/1) ... [2024-11-14 03:56:39,681 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2024-11-14 03:56:39,694 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_428ae638-b13a-42db-a03b-9534a794bc03/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 03:56:39,708 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_428ae638-b13a-42db-a03b-9534a794bc03/bin/utaipan-verify-sOmjnqqW8E/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2024-11-14 03:56:39,712 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_428ae638-b13a-42db-a03b-9534a794bc03/bin/utaipan-verify-sOmjnqqW8E/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2024-11-14 03:56:39,738 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-14 03:56:39,738 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2024-11-14 03:56:39,738 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-14 03:56:39,738 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-14 03:56:39,847 INFO L238 CfgBuilder]: Building ICFG [2024-11-14 03:56:39,849 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-14 03:56:42,482 INFO L? ?]: Removed 147 outVars from TransFormulas that were not future-live. [2024-11-14 03:56:42,482 INFO L287 CfgBuilder]: Performing block encoding [2024-11-14 03:56:42,919 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-14 03:56:42,922 INFO L316 CfgBuilder]: Removed 1 assume(true) statements. [2024-11-14 03:56:42,922 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.11 03:56:42 BoogieIcfgContainer [2024-11-14 03:56:42,922 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-14 03:56:42,924 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-14 03:56:42,924 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-14 03:56:42,930 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-14 03:56:42,930 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.11 03:56:38" (1/3) ... [2024-11-14 03:56:42,931 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@e82927a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.11 03:56:42, skipping insertion in model container [2024-11-14 03:56:42,931 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 03:56:39" (2/3) ... [2024-11-14 03:56:42,931 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@e82927a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.11 03:56:42, skipping insertion in model container [2024-11-14 03:56:42,932 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.11 03:56:42" (3/3) ... [2024-11-14 03:56:42,933 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem03_label28.c [2024-11-14 03:56:42,950 INFO L217 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-14 03:56:42,954 INFO L154 ceAbstractionStarter]: Applying trace abstraction to ICFG Problem03_label28.c that has 1 procedures, 148 locations, 1 initial locations, 1 loop locations, and 1 error locations. [2024-11-14 03:56:43,027 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-14 03:56:43,040 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;@48767364, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-14 03:56:43,041 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-11-14 03:56:43,048 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 03:56:43,061 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2024-11-14 03:56:43,062 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:56:43,062 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 03:56:43,063 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 03:56:43,068 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:56:43,069 INFO L85 PathProgramCache]: Analyzing trace with hash -1934956016, now seen corresponding path program 1 times [2024-11-14 03:56:43,078 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:56:43,078 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [772176985] [2024-11-14 03:56:43,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:56:43,080 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:56:43,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:56:44,253 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 03:56:44,255 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:56:44,255 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [772176985] [2024-11-14 03:56:44,258 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [772176985] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 03:56:44,258 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-14 03:56:44,258 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-14 03:56:44,260 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [441684266] [2024-11-14 03:56:44,260 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 03:56:44,266 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-14 03:56:44,267 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:56:44,289 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-14 03:56:44,290 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-14 03:56:44,293 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 03:56:45,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:56:45,438 INFO L93 Difference]: Finished difference Result 440 states and 860 transitions. [2024-11-14 03:56:45,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-14 03:56:45,440 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 03:56:45,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:56:45,449 INFO L225 Difference]: With dead ends: 440 [2024-11-14 03:56:45,450 INFO L226 Difference]: Without dead ends: 289 [2024-11-14 03:56:45,453 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 03:56:45,456 INFO L432 NwaCegarLoop]: 12 mSDtfsCounter, 50 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 491 mSolverCounterSat, 99 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 590 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 99 IncrementalHoareTripleChecker+Valid, 491 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2024-11-14 03:56:45,456 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [50 Valid, 17 Invalid, 590 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [99 Valid, 491 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2024-11-14 03:56:45,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 289 states. [2024-11-14 03:56:45,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 289 to 289. [2024-11-14 03:56:45,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 289 states, 288 states have (on average 1.9097222222222223) internal successors, (550), 288 states have internal predecessors, (550), 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 03:56:45,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 289 states to 289 states and 550 transitions. [2024-11-14 03:56:45,521 INFO L78 Accepts]: Start accepts. Automaton has 289 states and 550 transitions. Word has length 143 [2024-11-14 03:56:45,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:56:45,522 INFO L471 AbstractCegarLoop]: Abstraction has 289 states and 550 transitions. [2024-11-14 03:56:45,522 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 03:56:45,523 INFO L276 IsEmpty]: Start isEmpty. Operand 289 states and 550 transitions. [2024-11-14 03:56:45,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2024-11-14 03:56:45,525 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:56:45,525 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 03:56:45,526 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-14 03:56:45,526 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 03:56:45,526 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:56:45,527 INFO L85 PathProgramCache]: Analyzing trace with hash -37357273, now seen corresponding path program 1 times [2024-11-14 03:56:45,527 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:56:45,527 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [867713759] [2024-11-14 03:56:45,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:56:45,527 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:56:45,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:56:45,929 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 03:56:45,929 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:56:45,929 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [867713759] [2024-11-14 03:56:45,929 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [867713759] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 03:56:45,929 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-14 03:56:45,929 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-14 03:56:45,929 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [619762340] [2024-11-14 03:56:45,929 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 03:56:45,931 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-14 03:56:45,931 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:56:45,933 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-14 03:56:45,933 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-14 03:56:45,934 INFO L87 Difference]: Start difference. First operand 289 states and 550 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 03:56:46,858 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:56:46,858 INFO L93 Difference]: Finished difference Result 865 states and 1648 transitions. [2024-11-14 03:56:46,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-14 03:56:46,859 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 03:56:46,859 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:56:46,862 INFO L225 Difference]: With dead ends: 865 [2024-11-14 03:56:46,863 INFO L226 Difference]: Without dead ends: 577 [2024-11-14 03:56:46,864 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 03:56:46,865 INFO L432 NwaCegarLoop]: 46 mSDtfsCounter, 166 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 491 mSolverCounterSat, 91 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 166 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 582 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 91 IncrementalHoareTripleChecker+Valid, 491 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2024-11-14 03:56:46,865 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [166 Valid, 50 Invalid, 582 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [91 Valid, 491 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2024-11-14 03:56:46,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 577 states. [2024-11-14 03:56:46,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 577 to 575. [2024-11-14 03:56:46,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 575 states, 574 states have (on average 1.7613240418118468) internal successors, (1011), 574 states have internal predecessors, (1011), 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 03:56:46,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 575 states to 575 states and 1011 transitions. [2024-11-14 03:56:46,899 INFO L78 Accepts]: Start accepts. Automaton has 575 states and 1011 transitions. Word has length 148 [2024-11-14 03:56:46,899 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:56:46,899 INFO L471 AbstractCegarLoop]: Abstraction has 575 states and 1011 transitions. [2024-11-14 03:56:46,900 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 03:56:46,900 INFO L276 IsEmpty]: Start isEmpty. Operand 575 states and 1011 transitions. [2024-11-14 03:56:46,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2024-11-14 03:56:46,941 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:56:46,941 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 03:56:46,941 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-14 03:56:46,941 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 03:56:46,942 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:56:46,942 INFO L85 PathProgramCache]: Analyzing trace with hash 588535087, now seen corresponding path program 1 times [2024-11-14 03:56:46,942 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:56:46,942 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1424715259] [2024-11-14 03:56:46,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:56:46,942 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:56:47,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:56:47,220 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 03:56:47,222 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:56:47,222 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1424715259] [2024-11-14 03:56:47,222 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1424715259] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 03:56:47,223 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-14 03:56:47,223 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-14 03:56:47,223 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [272125141] [2024-11-14 03:56:47,223 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 03:56:47,223 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-14 03:56:47,223 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:56:47,224 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-14 03:56:47,224 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-14 03:56:47,224 INFO L87 Difference]: Start difference. First operand 575 states and 1011 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 03:56:48,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:56:48,122 INFO L93 Difference]: Finished difference Result 1721 states and 3030 transitions. [2024-11-14 03:56:48,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-14 03:56:48,123 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 03:56:48,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:56:48,129 INFO L225 Difference]: With dead ends: 1721 [2024-11-14 03:56:48,131 INFO L226 Difference]: Without dead ends: 1147 [2024-11-14 03:56:48,136 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 03:56:48,137 INFO L432 NwaCegarLoop]: 20 mSDtfsCounter, 159 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 452 mSolverCounterSat, 170 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s 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, 0.9s IncrementalHoareTripleChecker+Time [2024-11-14 03:56:48,137 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [159 Valid, 23 Invalid, 622 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [170 Valid, 452 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2024-11-14 03:56:48,142 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1147 states. [2024-11-14 03:56:48,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1147 to 1147. [2024-11-14 03:56:48,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1147 states, 1146 states have (on average 1.7137870855148343) internal successors, (1964), 1146 states have internal predecessors, (1964), 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 03:56:48,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1147 states to 1147 states and 1964 transitions. [2024-11-14 03:56:48,196 INFO L78 Accepts]: Start accepts. Automaton has 1147 states and 1964 transitions. Word has length 151 [2024-11-14 03:56:48,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:56:48,197 INFO L471 AbstractCegarLoop]: Abstraction has 1147 states and 1964 transitions. [2024-11-14 03:56:48,197 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 03:56:48,197 INFO L276 IsEmpty]: Start isEmpty. Operand 1147 states and 1964 transitions. [2024-11-14 03:56:48,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2024-11-14 03:56:48,203 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:56:48,203 INFO L215 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 03:56:48,203 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-11-14 03:56:48,203 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 03:56:48,204 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:56:48,204 INFO L85 PathProgramCache]: Analyzing trace with hash -770525110, now seen corresponding path program 1 times [2024-11-14 03:56:48,204 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:56:48,204 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [707564491] [2024-11-14 03:56:48,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:56:48,205 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:56:48,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:56:48,672 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 03:56:48,672 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:56:48,672 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [707564491] [2024-11-14 03:56:48,672 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [707564491] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 03:56:48,672 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-14 03:56:48,673 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-14 03:56:48,674 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1814496432] [2024-11-14 03:56:48,674 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 03:56:48,675 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-14 03:56:48,675 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:56:48,675 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-14 03:56:48,675 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-14 03:56:48,676 INFO L87 Difference]: Start difference. First operand 1147 states and 1964 transitions. Second operand has 3 states, 3 states have (on average 51.0) internal successors, (153), 2 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 03:56:49,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:56:49,727 INFO L93 Difference]: Finished difference Result 2865 states and 4880 transitions. [2024-11-14 03:56:49,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-14 03:56:49,727 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 51.0) internal successors, (153), 2 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 153 [2024-11-14 03:56:49,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:56:49,735 INFO L225 Difference]: With dead ends: 2865 [2024-11-14 03:56:49,736 INFO L226 Difference]: Without dead ends: 1719 [2024-11-14 03:56:49,738 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 03:56:49,739 INFO L432 NwaCegarLoop]: 31 mSDtfsCounter, 157 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 455 mSolverCounterSat, 152 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 157 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 607 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 152 IncrementalHoareTripleChecker+Valid, 455 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2024-11-14 03:56:49,739 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [157 Valid, 34 Invalid, 607 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [152 Valid, 455 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2024-11-14 03:56:49,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1719 states. [2024-11-14 03:56:49,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1719 to 1719. [2024-11-14 03:56:49,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1719 states, 1718 states have (on average 1.6717112922002328) internal successors, (2872), 1718 states have internal predecessors, (2872), 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 03:56:49,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1719 states to 1719 states and 2872 transitions. [2024-11-14 03:56:49,809 INFO L78 Accepts]: Start accepts. Automaton has 1719 states and 2872 transitions. Word has length 153 [2024-11-14 03:56:49,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:56:49,810 INFO L471 AbstractCegarLoop]: Abstraction has 1719 states and 2872 transitions. [2024-11-14 03:56:49,810 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 51.0) internal successors, (153), 2 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 03:56:49,810 INFO L276 IsEmpty]: Start isEmpty. Operand 1719 states and 2872 transitions. [2024-11-14 03:56:49,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2024-11-14 03:56:49,815 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:56:49,815 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 03:56:49,816 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-11-14 03:56:49,816 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 03:56:49,816 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:56:49,817 INFO L85 PathProgramCache]: Analyzing trace with hash -1401653951, now seen corresponding path program 1 times [2024-11-14 03:56:49,817 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:56:49,818 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [842846373] [2024-11-14 03:56:49,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:56:49,818 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:56:49,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:56:50,114 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 03:56:50,115 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:56:50,116 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [842846373] [2024-11-14 03:56:50,116 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [842846373] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 03:56:50,116 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-14 03:56:50,116 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-14 03:56:50,116 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [773422164] [2024-11-14 03:56:50,116 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 03:56:50,117 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-14 03:56:50,118 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:56:50,118 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-14 03:56:50,118 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-14 03:56:50,119 INFO L87 Difference]: Start difference. First operand 1719 states and 2872 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 03:56:51,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:56:51,041 INFO L93 Difference]: Finished difference Result 4295 states and 7294 transitions. [2024-11-14 03:56:51,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-14 03:56:51,041 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 03:56:51,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:56:51,053 INFO L225 Difference]: With dead ends: 4295 [2024-11-14 03:56:51,053 INFO L226 Difference]: Without dead ends: 2577 [2024-11-14 03:56:51,055 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 03:56:51,058 INFO L432 NwaCegarLoop]: 228 mSDtfsCounter, 34 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 456 mSolverCounterSat, 123 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 232 SdHoareTripleChecker+Invalid, 579 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 123 IncrementalHoareTripleChecker+Valid, 456 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2024-11-14 03:56:51,058 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 232 Invalid, 579 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [123 Valid, 456 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2024-11-14 03:56:51,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2577 states. [2024-11-14 03:56:51,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2577 to 2577. [2024-11-14 03:56:51,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2577 states, 2576 states have (on average 1.6164596273291925) internal successors, (4164), 2576 states have internal predecessors, (4164), 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 03:56:51,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2577 states to 2577 states and 4164 transitions. [2024-11-14 03:56:51,131 INFO L78 Accepts]: Start accepts. Automaton has 2577 states and 4164 transitions. Word has length 158 [2024-11-14 03:56:51,132 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:56:51,132 INFO L471 AbstractCegarLoop]: Abstraction has 2577 states and 4164 transitions. [2024-11-14 03:56:51,133 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 03:56:51,133 INFO L276 IsEmpty]: Start isEmpty. Operand 2577 states and 4164 transitions. [2024-11-14 03:56:51,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2024-11-14 03:56:51,176 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:56:51,176 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 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] [2024-11-14 03:56:51,177 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-11-14 03:56:51,177 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 03:56:51,177 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:56:51,177 INFO L85 PathProgramCache]: Analyzing trace with hash -2081743908, now seen corresponding path program 1 times [2024-11-14 03:56:51,178 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:56:51,178 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [587950730] [2024-11-14 03:56:51,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:56:51,178 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:56:51,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:56:51,540 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-14 03:56:51,541 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:56:51,541 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [587950730] [2024-11-14 03:56:51,541 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [587950730] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 03:56:51,541 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-14 03:56:51,541 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-14 03:56:51,541 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [473495358] [2024-11-14 03:56:51,541 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 03:56:51,542 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-14 03:56:51,542 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:56:51,543 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-14 03:56:51,543 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-14 03:56:51,543 INFO L87 Difference]: Start difference. First operand 2577 states and 4164 transitions. Second operand has 3 states, 3 states have (on average 51.666666666666664) internal successors, (155), 2 states have internal predecessors, (155), 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 03:56:52,525 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:56:52,525 INFO L93 Difference]: Finished difference Result 7727 states and 12489 transitions. [2024-11-14 03:56:52,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-14 03:56:52,526 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 51.666666666666664) internal successors, (155), 2 states have internal predecessors, (155), 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 160 [2024-11-14 03:56:52,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:56:52,545 INFO L225 Difference]: With dead ends: 7727 [2024-11-14 03:56:52,546 INFO L226 Difference]: Without dead ends: 5151 [2024-11-14 03:56:52,549 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 03:56:52,550 INFO L432 NwaCegarLoop]: 93 mSDtfsCounter, 143 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 404 mSolverCounterSat, 190 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 143 SdHoareTripleChecker+Valid, 96 SdHoareTripleChecker+Invalid, 594 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 190 IncrementalHoareTripleChecker+Valid, 404 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2024-11-14 03:56:52,551 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [143 Valid, 96 Invalid, 594 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [190 Valid, 404 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2024-11-14 03:56:52,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5151 states. [2024-11-14 03:56:52,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5151 to 4293. [2024-11-14 03:56:52,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4293 states, 4292 states have (on average 1.4319664492078286) internal successors, (6146), 4292 states have internal predecessors, (6146), 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 03:56:52,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4293 states to 4293 states and 6146 transitions. [2024-11-14 03:56:52,676 INFO L78 Accepts]: Start accepts. Automaton has 4293 states and 6146 transitions. Word has length 160 [2024-11-14 03:56:52,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:56:52,677 INFO L471 AbstractCegarLoop]: Abstraction has 4293 states and 6146 transitions. [2024-11-14 03:56:52,677 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 51.666666666666664) internal successors, (155), 2 states have internal predecessors, (155), 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 03:56:52,677 INFO L276 IsEmpty]: Start isEmpty. Operand 4293 states and 6146 transitions. [2024-11-14 03:56:52,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2024-11-14 03:56:52,682 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:56:52,682 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 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] [2024-11-14 03:56:52,682 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-11-14 03:56:52,682 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 03:56:52,683 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:56:52,683 INFO L85 PathProgramCache]: Analyzing trace with hash -619486954, now seen corresponding path program 1 times [2024-11-14 03:56:52,683 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:56:52,683 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2105982730] [2024-11-14 03:56:52,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:56:52,683 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:56:52,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:56:53,038 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 40 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-14 03:56:53,039 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:56:53,039 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2105982730] [2024-11-14 03:56:53,039 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2105982730] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 03:56:53,039 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-14 03:56:53,039 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-14 03:56:53,039 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1258170990] [2024-11-14 03:56:53,039 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 03:56:53,039 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-14 03:56:53,039 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:56:53,040 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-14 03:56:53,040 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-14 03:56:53,040 INFO L87 Difference]: Start difference. First operand 4293 states and 6146 transitions. Second operand has 4 states, 4 states have (on average 41.25) internal successors, (165), 3 states have internal predecessors, (165), 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 03:56:54,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:56:54,565 INFO L93 Difference]: Finished difference Result 17026 states and 24426 transitions. [2024-11-14 03:56:54,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-14 03:56:54,566 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 41.25) internal successors, (165), 3 states have internal predecessors, (165), 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 170 [2024-11-14 03:56:54,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:56:54,609 INFO L225 Difference]: With dead ends: 17026 [2024-11-14 03:56:54,609 INFO L226 Difference]: Without dead ends: 12734 [2024-11-14 03:56:54,615 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-14 03:56:54,616 INFO L432 NwaCegarLoop]: 13 mSDtfsCounter, 650 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 735 mSolverCounterSat, 235 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 650 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 970 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 235 IncrementalHoareTripleChecker+Valid, 735 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2024-11-14 03:56:54,616 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [650 Valid, 21 Invalid, 970 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [235 Valid, 735 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2024-11-14 03:56:54,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12734 states. [2024-11-14 03:56:54,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12734 to 12730. [2024-11-14 03:56:54,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12730 states, 12729 states have (on average 1.4173933537591328) internal successors, (18042), 12729 states have internal predecessors, (18042), 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 03:56:54,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12730 states to 12730 states and 18042 transitions. [2024-11-14 03:56:54,959 INFO L78 Accepts]: Start accepts. Automaton has 12730 states and 18042 transitions. Word has length 170 [2024-11-14 03:56:54,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:56:54,960 INFO L471 AbstractCegarLoop]: Abstraction has 12730 states and 18042 transitions. [2024-11-14 03:56:54,960 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 41.25) internal successors, (165), 3 states have internal predecessors, (165), 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 03:56:54,960 INFO L276 IsEmpty]: Start isEmpty. Operand 12730 states and 18042 transitions. [2024-11-14 03:56:54,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 193 [2024-11-14 03:56:54,965 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:56:54,966 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 03:56:54,966 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-11-14 03:56:54,966 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 03:56:54,966 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:56:54,967 INFO L85 PathProgramCache]: Analyzing trace with hash 634784920, now seen corresponding path program 1 times [2024-11-14 03:56:54,967 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:56:54,967 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [899539202] [2024-11-14 03:56:54,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:56:54,967 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:56:55,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:56:55,326 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 62 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-14 03:56:55,326 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:56:55,326 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [899539202] [2024-11-14 03:56:55,326 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [899539202] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 03:56:55,326 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-14 03:56:55,326 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-14 03:56:55,326 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [637290362] [2024-11-14 03:56:55,327 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 03:56:55,327 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-14 03:56:55,327 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:56:55,328 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-14 03:56:55,328 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-14 03:56:55,328 INFO L87 Difference]: Start difference. First operand 12730 states and 18042 transitions. Second operand has 3 states, 3 states have (on average 62.333333333333336) internal successors, (187), 3 states have internal predecessors, (187), 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 03:56:56,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:56:56,412 INFO L93 Difference]: Finished difference Result 32752 states and 46266 transitions. [2024-11-14 03:56:56,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-14 03:56:56,413 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 62.333333333333336) internal successors, (187), 3 states have internal predecessors, (187), 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 192 [2024-11-14 03:56:56,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:56:56,491 INFO L225 Difference]: With dead ends: 32752 [2024-11-14 03:56:56,491 INFO L226 Difference]: Without dead ends: 20023 [2024-11-14 03:56:56,507 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 03:56:56,508 INFO L432 NwaCegarLoop]: 225 mSDtfsCounter, 114 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 440 mSolverCounterSat, 151 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 114 SdHoareTripleChecker+Valid, 229 SdHoareTripleChecker+Invalid, 591 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 151 IncrementalHoareTripleChecker+Valid, 440 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2024-11-14 03:56:56,508 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [114 Valid, 229 Invalid, 591 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [151 Valid, 440 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2024-11-14 03:56:56,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20023 states. [2024-11-14 03:56:56,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20023 to 19165. [2024-11-14 03:56:56,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19165 states, 19164 states have (on average 1.3536318096430808) internal successors, (25941), 19164 states have internal predecessors, (25941), 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 03:56:56,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19165 states to 19165 states and 25941 transitions. [2024-11-14 03:56:56,960 INFO L78 Accepts]: Start accepts. Automaton has 19165 states and 25941 transitions. Word has length 192 [2024-11-14 03:56:56,960 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:56:56,960 INFO L471 AbstractCegarLoop]: Abstraction has 19165 states and 25941 transitions. [2024-11-14 03:56:56,960 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 62.333333333333336) internal successors, (187), 3 states have internal predecessors, (187), 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 03:56:56,961 INFO L276 IsEmpty]: Start isEmpty. Operand 19165 states and 25941 transitions. [2024-11-14 03:56:56,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 209 [2024-11-14 03:56:56,968 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:56:56,968 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, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2024-11-14 03:56:56,968 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-11-14 03:56:56,968 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 03:56:56,969 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:56:56,969 INFO L85 PathProgramCache]: Analyzing trace with hash 883743709, now seen corresponding path program 1 times [2024-11-14 03:56:56,969 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:56:56,969 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1349861578] [2024-11-14 03:56:56,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:56:56,969 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:56:57,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:56:57,427 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 94 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 03:56:57,427 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:56:57,427 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1349861578] [2024-11-14 03:56:57,428 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1349861578] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 03:56:57,428 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-14 03:56:57,428 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-14 03:56:57,428 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [646879058] [2024-11-14 03:56:57,428 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 03:56:57,428 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-14 03:56:57,429 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:56:57,429 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-14 03:56:57,432 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-14 03:56:57,432 INFO L87 Difference]: Start difference. First operand 19165 states and 25941 transitions. Second operand has 4 states, 4 states have (on average 52.0) internal successors, (208), 3 states have internal predecessors, (208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 03:56:58,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:56:58,918 INFO L93 Difference]: Finished difference Result 39902 states and 54040 transitions. [2024-11-14 03:56:58,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-14 03:56:58,919 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 52.0) internal successors, (208), 3 states have internal predecessors, (208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 208 [2024-11-14 03:56:58,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:56:58,968 INFO L225 Difference]: With dead ends: 39902 [2024-11-14 03:56:58,968 INFO L226 Difference]: Without dead ends: 20738 [2024-11-14 03:56:58,985 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-14 03:56:58,986 INFO L432 NwaCegarLoop]: 44 mSDtfsCounter, 234 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 865 mSolverCounterSat, 214 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 234 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 1079 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 214 IncrementalHoareTripleChecker+Valid, 865 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2024-11-14 03:56:58,986 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [234 Valid, 52 Invalid, 1079 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [214 Valid, 865 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2024-11-14 03:56:59,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20738 states. [2024-11-14 03:56:59,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20738 to 18736. [2024-11-14 03:56:59,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18736 states, 18735 states have (on average 1.3517480651187617) internal successors, (25325), 18735 states have internal predecessors, (25325), 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 03:56:59,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18736 states to 18736 states and 25325 transitions. [2024-11-14 03:56:59,321 INFO L78 Accepts]: Start accepts. Automaton has 18736 states and 25325 transitions. Word has length 208 [2024-11-14 03:56:59,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:56:59,321 INFO L471 AbstractCegarLoop]: Abstraction has 18736 states and 25325 transitions. [2024-11-14 03:56:59,322 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 52.0) internal successors, (208), 3 states have internal predecessors, (208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 03:56:59,323 INFO L276 IsEmpty]: Start isEmpty. Operand 18736 states and 25325 transitions. [2024-11-14 03:56:59,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 216 [2024-11-14 03:56:59,371 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:56:59,371 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2024-11-14 03:56:59,372 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-11-14 03:56:59,372 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 03:56:59,376 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:56:59,376 INFO L85 PathProgramCache]: Analyzing trace with hash 47995915, now seen corresponding path program 1 times [2024-11-14 03:56:59,376 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:56:59,376 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [502983171] [2024-11-14 03:56:59,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:56:59,376 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:56:59,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:56:59,844 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 74 proven. 6 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2024-11-14 03:56:59,845 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:56:59,845 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [502983171] [2024-11-14 03:56:59,845 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [502983171] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 03:56:59,845 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [243844978] [2024-11-14 03:56:59,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:56:59,846 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:56:59,846 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_428ae638-b13a-42db-a03b-9534a794bc03/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 03:56:59,849 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_428ae638-b13a-42db-a03b-9534a794bc03/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 03:56:59,851 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_428ae638-b13a-42db-a03b-9534a794bc03/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-14 03:57:00,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:57:00,067 INFO L255 TraceCheckSpWp]: Trace formula consists of 450 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-11-14 03:57:00,079 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 03:57:00,169 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 108 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-14 03:57:00,170 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-14 03:57:00,170 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [243844978] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 03:57:00,170 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-14 03:57:00,170 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2024-11-14 03:57:00,170 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [148966001] [2024-11-14 03:57:00,170 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 03:57:00,171 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-14 03:57:00,171 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:57:00,172 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-14 03:57:00,172 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-14 03:57:00,172 INFO L87 Difference]: Start difference. First operand 18736 states and 25325 transitions. Second operand has 3 states, 3 states have (on average 70.0) internal successors, (210), 3 states have internal predecessors, (210), 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 03:57:01,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:57:01,309 INFO L93 Difference]: Finished difference Result 46337 states and 62328 transitions. [2024-11-14 03:57:01,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-14 03:57:01,310 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 70.0) internal successors, (210), 3 states have internal predecessors, (210), 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 215 [2024-11-14 03:57:01,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:57:01,374 INFO L225 Difference]: With dead ends: 46337 [2024-11-14 03:57:01,374 INFO L226 Difference]: Without dead ends: 27602 [2024-11-14 03:57:01,390 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 217 GetRequests, 214 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 03:57:01,391 INFO L432 NwaCegarLoop]: 251 mSDtfsCounter, 123 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 477 mSolverCounterSat, 119 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 123 SdHoareTripleChecker+Valid, 255 SdHoareTripleChecker+Invalid, 596 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 119 IncrementalHoareTripleChecker+Valid, 477 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2024-11-14 03:57:01,391 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [123 Valid, 255 Invalid, 596 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [119 Valid, 477 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2024-11-14 03:57:01,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27602 states. [2024-11-14 03:57:01,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27602 to 26887. [2024-11-14 03:57:01,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26887 states, 26886 states have (on average 1.3085992709960574) internal successors, (35183), 26886 states have internal predecessors, (35183), 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 03:57:01,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26887 states to 26887 states and 35183 transitions. [2024-11-14 03:57:01,783 INFO L78 Accepts]: Start accepts. Automaton has 26887 states and 35183 transitions. Word has length 215 [2024-11-14 03:57:01,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:57:01,783 INFO L471 AbstractCegarLoop]: Abstraction has 26887 states and 35183 transitions. [2024-11-14 03:57:01,783 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 70.0) internal successors, (210), 3 states have internal predecessors, (210), 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 03:57:01,783 INFO L276 IsEmpty]: Start isEmpty. Operand 26887 states and 35183 transitions. [2024-11-14 03:57:01,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 228 [2024-11-14 03:57:01,794 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:57:01,795 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 03:57:01,816 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_428ae638-b13a-42db-a03b-9534a794bc03/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-14 03:57:01,996 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_428ae638-b13a-42db-a03b-9534a794bc03/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:57:01,996 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 03:57:01,997 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:57:01,997 INFO L85 PathProgramCache]: Analyzing trace with hash 1298444399, now seen corresponding path program 1 times [2024-11-14 03:57:01,997 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:57:01,998 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1561438053] [2024-11-14 03:57:01,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:57:01,998 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:57:02,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:57:02,607 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 58 proven. 0 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2024-11-14 03:57:02,607 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:57:02,607 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1561438053] [2024-11-14 03:57:02,607 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1561438053] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 03:57:02,607 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-14 03:57:02,607 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-14 03:57:02,607 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [50116433] [2024-11-14 03:57:02,608 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 03:57:02,608 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-14 03:57:02,608 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:57:02,608 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-14 03:57:02,609 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-14 03:57:02,609 INFO L87 Difference]: Start difference. First operand 26887 states and 35183 transitions. Second operand has 3 states, 3 states have (on average 58.0) internal successors, (174), 2 states have internal predecessors, (174), 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 03:57:03,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:57:03,745 INFO L93 Difference]: Finished difference Result 57636 states and 75085 transitions. [2024-11-14 03:57:03,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-14 03:57:03,745 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 58.0) internal successors, (174), 2 states have internal predecessors, (174), 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 227 [2024-11-14 03:57:03,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:57:03,813 INFO L225 Difference]: With dead ends: 57636 [2024-11-14 03:57:03,813 INFO L226 Difference]: Without dead ends: 30750 [2024-11-14 03:57:03,830 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 03:57:03,831 INFO L432 NwaCegarLoop]: 88 mSDtfsCounter, 130 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 579 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 130 SdHoareTripleChecker+Valid, 97 SdHoareTripleChecker+Invalid, 591 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 579 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2024-11-14 03:57:03,831 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [130 Valid, 97 Invalid, 591 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 579 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2024-11-14 03:57:03,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30750 states. [2024-11-14 03:57:04,345 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30750 to 30605. [2024-11-14 03:57:04,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30605 states, 30604 states have (on average 1.2975428048621096) internal successors, (39710), 30604 states have internal predecessors, (39710), 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 03:57:04,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30605 states to 30605 states and 39710 transitions. [2024-11-14 03:57:04,414 INFO L78 Accepts]: Start accepts. Automaton has 30605 states and 39710 transitions. Word has length 227 [2024-11-14 03:57:04,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:57:04,414 INFO L471 AbstractCegarLoop]: Abstraction has 30605 states and 39710 transitions. [2024-11-14 03:57:04,414 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 58.0) internal successors, (174), 2 states have internal predecessors, (174), 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 03:57:04,414 INFO L276 IsEmpty]: Start isEmpty. Operand 30605 states and 39710 transitions. [2024-11-14 03:57:04,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 236 [2024-11-14 03:57:04,428 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:57:04,428 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 03:57:04,428 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-11-14 03:57:04,428 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 03:57:04,429 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:57:04,429 INFO L85 PathProgramCache]: Analyzing trace with hash 428275698, now seen corresponding path program 1 times [2024-11-14 03:57:04,429 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:57:04,429 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1793513070] [2024-11-14 03:57:04,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:57:04,429 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:57:04,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:57:04,849 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 74 proven. 6 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2024-11-14 03:57:04,849 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:57:04,849 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1793513070] [2024-11-14 03:57:04,849 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1793513070] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 03:57:04,850 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [739765937] [2024-11-14 03:57:04,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:57:04,850 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:57:04,850 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_428ae638-b13a-42db-a03b-9534a794bc03/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 03:57:04,852 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_428ae638-b13a-42db-a03b-9534a794bc03/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 03:57:04,855 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_428ae638-b13a-42db-a03b-9534a794bc03/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-14 03:57:05,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:57:05,060 INFO L255 TraceCheckSpWp]: Trace formula consists of 477 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-11-14 03:57:05,065 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 03:57:05,367 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 74 proven. 0 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2024-11-14 03:57:05,367 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-14 03:57:05,367 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [739765937] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 03:57:05,367 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-14 03:57:05,367 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2024-11-14 03:57:05,368 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1186955755] [2024-11-14 03:57:05,368 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 03:57:05,368 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-14 03:57:05,368 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:57:05,369 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-14 03:57:05,369 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-14 03:57:05,369 INFO L87 Difference]: Start difference. First operand 30605 states and 39710 transitions. Second operand has 3 states, 3 states have (on average 59.0) internal successors, (177), 3 states have internal predecessors, (177), 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 03:57:06,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:57:06,434 INFO L93 Difference]: Finished difference Result 76510 states and 99924 transitions. [2024-11-14 03:57:06,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-14 03:57:06,435 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 59.0) internal successors, (177), 3 states have internal predecessors, (177), 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 235 [2024-11-14 03:57:06,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:57:06,512 INFO L225 Difference]: With dead ends: 76510 [2024-11-14 03:57:06,512 INFO L226 Difference]: Without dead ends: 45906 [2024-11-14 03:57:06,534 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 237 GetRequests, 234 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 03:57:06,534 INFO L432 NwaCegarLoop]: 230 mSDtfsCounter, 31 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 437 mSolverCounterSat, 147 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 234 SdHoareTripleChecker+Invalid, 584 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 147 IncrementalHoareTripleChecker+Valid, 437 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2024-11-14 03:57:06,535 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 234 Invalid, 584 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [147 Valid, 437 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2024-11-14 03:57:06,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45906 states. [2024-11-14 03:57:07,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45906 to 43189. [2024-11-14 03:57:07,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43189 states, 43188 states have (on average 1.2682458090210245) internal successors, (54773), 43188 states have internal predecessors, (54773), 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 03:57:07,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43189 states to 43189 states and 54773 transitions. [2024-11-14 03:57:07,258 INFO L78 Accepts]: Start accepts. Automaton has 43189 states and 54773 transitions. Word has length 235 [2024-11-14 03:57:07,258 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:57:07,258 INFO L471 AbstractCegarLoop]: Abstraction has 43189 states and 54773 transitions. [2024-11-14 03:57:07,259 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 59.0) internal successors, (177), 3 states have internal predecessors, (177), 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 03:57:07,259 INFO L276 IsEmpty]: Start isEmpty. Operand 43189 states and 54773 transitions. [2024-11-14 03:57:07,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 262 [2024-11-14 03:57:07,275 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:57:07,276 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 03:57:07,295 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_428ae638-b13a-42db-a03b-9534a794bc03/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-11-14 03:57:07,476 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_428ae638-b13a-42db-a03b-9534a794bc03/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:57:07,479 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 03:57:07,480 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:57:07,480 INFO L85 PathProgramCache]: Analyzing trace with hash -1642501498, now seen corresponding path program 1 times [2024-11-14 03:57:07,480 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:57:07,480 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [637766101] [2024-11-14 03:57:07,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:57:07,481 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:57:07,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:57:07,942 INFO L134 CoverageAnalysis]: Checked inductivity of 209 backedges. 95 proven. 0 refuted. 0 times theorem prover too weak. 114 trivial. 0 not checked. [2024-11-14 03:57:07,942 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:57:07,942 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [637766101] [2024-11-14 03:57:07,942 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [637766101] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 03:57:07,942 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-14 03:57:07,942 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-14 03:57:07,943 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [469339867] [2024-11-14 03:57:07,943 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 03:57:07,943 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-14 03:57:07,943 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:57:07,944 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-14 03:57:07,944 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-14 03:57:07,944 INFO L87 Difference]: Start difference. First operand 43189 states and 54773 transitions. Second operand has 3 states, 3 states have (on average 59.666666666666664) internal successors, (179), 2 states have internal predecessors, (179), 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 03:57:09,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:57:09,024 INFO L93 Difference]: Finished difference Result 88095 states and 111438 transitions. [2024-11-14 03:57:09,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-14 03:57:09,024 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 59.666666666666664) internal successors, (179), 2 states have internal predecessors, (179), 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 261 [2024-11-14 03:57:09,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:57:09,124 INFO L225 Difference]: With dead ends: 88095 [2024-11-14 03:57:09,124 INFO L226 Difference]: Without dead ends: 44907 [2024-11-14 03:57:09,151 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 03:57:09,152 INFO L432 NwaCegarLoop]: 101 mSDtfsCounter, 121 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 469 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 121 SdHoareTripleChecker+Valid, 105 SdHoareTripleChecker+Invalid, 472 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 469 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2024-11-14 03:57:09,152 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [121 Valid, 105 Invalid, 472 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 469 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2024-11-14 03:57:09,186 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44907 states. [2024-11-14 03:57:09,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44907 to 44905. [2024-11-14 03:57:09,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44905 states, 44904 states have (on average 1.261691608765366) internal successors, (56655), 44904 states have internal predecessors, (56655), 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 03:57:09,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44905 states to 44905 states and 56655 transitions. [2024-11-14 03:57:09,997 INFO L78 Accepts]: Start accepts. Automaton has 44905 states and 56655 transitions. Word has length 261 [2024-11-14 03:57:09,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:57:09,997 INFO L471 AbstractCegarLoop]: Abstraction has 44905 states and 56655 transitions. [2024-11-14 03:57:09,997 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 59.666666666666664) internal successors, (179), 2 states have internal predecessors, (179), 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 03:57:09,997 INFO L276 IsEmpty]: Start isEmpty. Operand 44905 states and 56655 transitions. [2024-11-14 03:57:10,009 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 272 [2024-11-14 03:57:10,009 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:57:10,010 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 03:57:10,010 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-11-14 03:57:10,010 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 03:57:10,010 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:57:10,010 INFO L85 PathProgramCache]: Analyzing trace with hash 1348359866, now seen corresponding path program 1 times [2024-11-14 03:57:10,010 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:57:10,010 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1866564379] [2024-11-14 03:57:10,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:57:10,011 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:57:10,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:57:10,881 INFO L134 CoverageAnalysis]: Checked inductivity of 180 backedges. 126 proven. 0 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2024-11-14 03:57:10,881 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:57:10,882 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1866564379] [2024-11-14 03:57:10,882 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1866564379] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 03:57:10,882 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-14 03:57:10,882 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-14 03:57:10,884 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [810182052] [2024-11-14 03:57:10,884 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 03:57:10,884 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-14 03:57:10,884 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:57:10,885 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-14 03:57:10,885 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-14 03:57:10,885 INFO L87 Difference]: Start difference. First operand 44905 states and 56655 transitions. Second operand has 3 states, 3 states have (on average 72.66666666666667) internal successors, (218), 2 states have internal predecessors, (218), 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 03:57:11,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:57:11,717 INFO L93 Difference]: Finished difference Result 89952 states and 113447 transitions. [2024-11-14 03:57:11,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-14 03:57:11,718 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 72.66666666666667) internal successors, (218), 2 states have internal predecessors, (218), 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 271 [2024-11-14 03:57:11,718 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:57:11,762 INFO L225 Difference]: With dead ends: 89952 [2024-11-14 03:57:11,763 INFO L226 Difference]: Without dead ends: 45334 [2024-11-14 03:57:11,787 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 03:57:11,788 INFO L432 NwaCegarLoop]: 103 mSDtfsCounter, 72 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 466 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 107 SdHoareTripleChecker+Invalid, 471 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 466 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2024-11-14 03:57:11,788 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [72 Valid, 107 Invalid, 471 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 466 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2024-11-14 03:57:11,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45334 states. [2024-11-14 03:57:12,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45334 to 45048. [2024-11-14 03:57:12,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45048 states, 45047 states have (on average 1.2614158545519125) internal successors, (56823), 45047 states have internal predecessors, (56823), 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 03:57:12,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45048 states to 45048 states and 56823 transitions. [2024-11-14 03:57:12,314 INFO L78 Accepts]: Start accepts. Automaton has 45048 states and 56823 transitions. Word has length 271 [2024-11-14 03:57:12,314 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:57:12,314 INFO L471 AbstractCegarLoop]: Abstraction has 45048 states and 56823 transitions. [2024-11-14 03:57:12,314 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 72.66666666666667) internal successors, (218), 2 states have internal predecessors, (218), 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 03:57:12,314 INFO L276 IsEmpty]: Start isEmpty. Operand 45048 states and 56823 transitions. [2024-11-14 03:57:12,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 283 [2024-11-14 03:57:12,331 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:57:12,331 INFO L215 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 03:57:12,331 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-11-14 03:57:12,331 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 03:57:12,331 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:57:12,331 INFO L85 PathProgramCache]: Analyzing trace with hash 1326341874, now seen corresponding path program 1 times [2024-11-14 03:57:12,331 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:57:12,332 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1679339020] [2024-11-14 03:57:12,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:57:12,332 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:57:12,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:57:12,950 INFO L134 CoverageAnalysis]: Checked inductivity of 213 backedges. 135 proven. 0 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2024-11-14 03:57:12,951 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:57:12,951 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1679339020] [2024-11-14 03:57:12,951 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1679339020] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 03:57:12,951 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-14 03:57:12,951 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-14 03:57:12,951 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1008109610] [2024-11-14 03:57:12,951 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 03:57:12,952 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-14 03:57:12,952 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:57:12,953 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-14 03:57:12,953 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-14 03:57:12,953 INFO L87 Difference]: Start difference. First operand 45048 states and 56823 transitions. Second operand has 3 states, 3 states have (on average 73.66666666666667) internal successors, (221), 2 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 03:57:14,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:57:14,020 INFO L93 Difference]: Finished difference Result 98677 states and 124607 transitions. [2024-11-14 03:57:14,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-14 03:57:14,021 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 73.66666666666667) internal successors, (221), 2 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 282 [2024-11-14 03:57:14,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:57:14,066 INFO L225 Difference]: With dead ends: 98677 [2024-11-14 03:57:14,066 INFO L226 Difference]: Without dead ends: 55489 [2024-11-14 03:57:14,090 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 03:57:14,091 INFO L432 NwaCegarLoop]: 81 mSDtfsCounter, 86 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 578 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 86 SdHoareTripleChecker+Valid, 93 SdHoareTripleChecker+Invalid, 589 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 578 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2024-11-14 03:57:14,091 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [86 Valid, 93 Invalid, 589 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 578 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2024-11-14 03:57:14,131 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55489 states. [2024-11-14 03:57:14,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55489 to 52198. [2024-11-14 03:57:14,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52198 states, 52197 states have (on average 1.2675824281088952) internal successors, (66164), 52197 states have internal predecessors, (66164), 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 03:57:14,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52198 states to 52198 states and 66164 transitions. [2024-11-14 03:57:14,898 INFO L78 Accepts]: Start accepts. Automaton has 52198 states and 66164 transitions. Word has length 282 [2024-11-14 03:57:14,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:57:14,898 INFO L471 AbstractCegarLoop]: Abstraction has 52198 states and 66164 transitions. [2024-11-14 03:57:14,898 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 73.66666666666667) internal successors, (221), 2 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 03:57:14,899 INFO L276 IsEmpty]: Start isEmpty. Operand 52198 states and 66164 transitions. [2024-11-14 03:57:14,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 300 [2024-11-14 03:57:14,918 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:57:14,918 INFO L215 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 3, 3, 3, 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] [2024-11-14 03:57:14,918 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-11-14 03:57:14,918 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 03:57:14,919 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:57:14,919 INFO L85 PathProgramCache]: Analyzing trace with hash -486051094, now seen corresponding path program 1 times [2024-11-14 03:57:14,919 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:57:14,919 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [762733888] [2024-11-14 03:57:14,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:57:14,919 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:57:14,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:57:15,575 INFO L134 CoverageAnalysis]: Checked inductivity of 365 backedges. 147 proven. 6 refuted. 0 times theorem prover too weak. 212 trivial. 0 not checked. [2024-11-14 03:57:15,576 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:57:15,576 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [762733888] [2024-11-14 03:57:15,576 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [762733888] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 03:57:15,576 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [949498754] [2024-11-14 03:57:15,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:57:15,576 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:57:15,576 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_428ae638-b13a-42db-a03b-9534a794bc03/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 03:57:15,579 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_428ae638-b13a-42db-a03b-9534a794bc03/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 03:57:15,580 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_428ae638-b13a-42db-a03b-9534a794bc03/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-14 03:57:15,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:57:15,871 INFO L255 TraceCheckSpWp]: Trace formula consists of 604 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-11-14 03:57:15,878 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 03:57:16,360 INFO L134 CoverageAnalysis]: Checked inductivity of 365 backedges. 0 proven. 155 refuted. 0 times theorem prover too weak. 210 trivial. 0 not checked. [2024-11-14 03:57:16,361 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 03:57:16,785 INFO L134 CoverageAnalysis]: Checked inductivity of 365 backedges. 0 proven. 155 refuted. 0 times theorem prover too weak. 210 trivial. 0 not checked. [2024-11-14 03:57:16,785 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [949498754] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 03:57:16,786 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1392596573] [2024-11-14 03:57:16,815 INFO L159 IcfgInterpreter]: Started Sifa with 145 locations of interest [2024-11-14 03:57:16,815 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 03:57:16,819 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 03:57:16,825 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 03:57:16,825 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 03:57:36,404 WARN L286 SmtUtils]: Spent 9.09s 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 03:57:45,161 WARN L286 SmtUtils]: Spent 8.75s 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 03:58:34,081 WARN L176 XnfTransformerHelper]: Simplifying disjunction of 13408 conjunctions. This might take some time... [2024-11-14 03:58:47,844 INFO L192 XnfTransformerHelper]: Simplified to disjunction of 13408 conjunctions. [2024-11-14 03:58:47,958 WARN L176 XnfTransformerHelper]: Simplifying disjunction of 13408 conjunctions. This might take some time... [2024-11-14 03:59:01,160 INFO L192 XnfTransformerHelper]: Simplified to disjunction of 13408 conjunctions. [2024-11-14 04:02:41,329 WARN L286 SmtUtils]: Spent 3.66m 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 04:06:17,490 WARN L286 SmtUtils]: Spent 3.60m 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)