./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/eca-rers2012/Problem03_label06.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_7a212249-a434-4a09-81a1-7d2fb865d855/bin/utaipan-verify-sOmjnqqW8E/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a212249-a434-4a09-81a1-7d2fb865d855/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_7a212249-a434-4a09-81a1-7d2fb865d855/bin/utaipan-verify-sOmjnqqW8E/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a212249-a434-4a09-81a1-7d2fb865d855/bin/utaipan-verify-sOmjnqqW8E/config/TaipanReach.xml -i ../../sv-benchmarks/c/eca-rers2012/Problem03_label06.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a212249-a434-4a09-81a1-7d2fb865d855/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_7a212249-a434-4a09-81a1-7d2fb865d855/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 6ee2b5babe7331afe701eeca9f9b0daa94765a62f83084cc43a986ae2ceb2b03 --- Real Ultimate output --- This is Ultimate 0.3.0-dev-826ab2b [2024-11-14 02:46:54,128 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-14 02:46:54,187 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a212249-a434-4a09-81a1-7d2fb865d855/bin/utaipan-verify-sOmjnqqW8E/config/svcomp-Reach-32bit-Taipan_Default.epf [2024-11-14 02:46:54,193 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-14 02:46:54,193 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-14 02:46:54,217 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-14 02:46:54,218 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-14 02:46:54,218 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-14 02:46:54,218 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-14 02:46:54,218 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-14 02:46:54,218 INFO L153 SettingsManager]: * User list type=DISABLED [2024-11-14 02:46:54,219 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2024-11-14 02:46:54,219 INFO L153 SettingsManager]: * Explicit value domain=true [2024-11-14 02:46:54,219 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2024-11-14 02:46:54,219 INFO L153 SettingsManager]: * Octagon Domain=false [2024-11-14 02:46:54,219 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2024-11-14 02:46:54,219 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2024-11-14 02:46:54,219 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2024-11-14 02:46:54,219 INFO L153 SettingsManager]: * Interval Domain=false [2024-11-14 02:46:54,219 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2024-11-14 02:46:54,220 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2024-11-14 02:46:54,220 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2024-11-14 02:46:54,220 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-14 02:46:54,221 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-14 02:46:54,221 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-14 02:46:54,221 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-14 02:46:54,221 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-14 02:46:54,221 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-14 02:46:54,221 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-14 02:46:54,222 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-14 02:46:54,222 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-14 02:46:54,222 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-14 02:46:54,222 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-14 02:46:54,222 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-14 02:46:54,222 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-14 02:46:54,222 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-14 02:46:54,223 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-14 02:46:54,223 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-14 02:46:54,223 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2024-11-14 02:46:54,223 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-14 02:46:54,223 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-14 02:46:54,223 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-14 02:46:54,223 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2024-11-14 02:46:54,224 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-14 02:46:54,224 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-14 02:46:54,224 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2024-11-14 02:46:54,224 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-14 02:46:54,224 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_7a212249-a434-4a09-81a1-7d2fb865d855/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 -> 6ee2b5babe7331afe701eeca9f9b0daa94765a62f83084cc43a986ae2ceb2b03 [2024-11-14 02:46:54,503 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-14 02:46:54,511 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-14 02:46:54,513 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-14 02:46:54,515 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-14 02:46:54,515 INFO L274 PluginConnector]: CDTParser initialized [2024-11-14 02:46:54,516 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a212249-a434-4a09-81a1-7d2fb865d855/bin/utaipan-verify-sOmjnqqW8E/../../sv-benchmarks/c/eca-rers2012/Problem03_label06.c Unable to find full path for "g++" [2024-11-14 02:46:56,329 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-14 02:46:56,750 INFO L384 CDTParser]: Found 1 translation units. [2024-11-14 02:46:56,751 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a212249-a434-4a09-81a1-7d2fb865d855/sv-benchmarks/c/eca-rers2012/Problem03_label06.c [2024-11-14 02:46:56,766 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a212249-a434-4a09-81a1-7d2fb865d855/bin/utaipan-verify-sOmjnqqW8E/data/605580f7f/0a40626102f74292a823d8bb74849f7b/FLAGd8a67f084 [2024-11-14 02:46:56,781 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a212249-a434-4a09-81a1-7d2fb865d855/bin/utaipan-verify-sOmjnqqW8E/data/605580f7f/0a40626102f74292a823d8bb74849f7b [2024-11-14 02:46:56,783 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-14 02:46:56,785 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-14 02:46:56,786 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-14 02:46:56,787 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-14 02:46:56,791 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-14 02:46:56,792 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.11 02:46:56" (1/1) ... [2024-11-14 02:46:56,793 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1ae09027 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 02:46:56, skipping insertion in model container [2024-11-14 02:46:56,793 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.11 02:46:56" (1/1) ... [2024-11-14 02:46:56,851 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-14 02:46:57,378 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_7a212249-a434-4a09-81a1-7d2fb865d855/sv-benchmarks/c/eca-rers2012/Problem03_label06.c[57034,57047] [2024-11-14 02:46:57,420 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-14 02:46:57,433 INFO L200 MainTranslator]: Completed pre-run [2024-11-14 02:46:57,709 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_7a212249-a434-4a09-81a1-7d2fb865d855/sv-benchmarks/c/eca-rers2012/Problem03_label06.c[57034,57047] [2024-11-14 02:46:57,726 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-14 02:46:57,744 INFO L204 MainTranslator]: Completed translation [2024-11-14 02:46:57,745 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 02:46:57 WrapperNode [2024-11-14 02:46:57,745 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-14 02:46:57,746 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-14 02:46:57,746 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-14 02:46:57,746 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-14 02:46:57,753 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 02:46:57" (1/1) ... [2024-11-14 02:46:57,778 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 02:46:57" (1/1) ... [2024-11-14 02:46:57,865 INFO L138 Inliner]: procedures = 14, calls = 8, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 1771 [2024-11-14 02:46:57,865 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-14 02:46:57,866 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-14 02:46:57,866 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-14 02:46:57,866 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-14 02:46:57,873 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 02:46:57" (1/1) ... [2024-11-14 02:46:57,873 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 02:46:57" (1/1) ... [2024-11-14 02:46:57,881 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 02:46:57" (1/1) ... [2024-11-14 02:46:57,881 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 02:46:57" (1/1) ... [2024-11-14 02:46:57,939 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 02:46:57" (1/1) ... [2024-11-14 02:46:57,960 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 02:46:57" (1/1) ... [2024-11-14 02:46:57,983 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 02:46:57" (1/1) ... [2024-11-14 02:46:57,992 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 02:46:57" (1/1) ... [2024-11-14 02:46:58,007 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-14 02:46:58,008 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-14 02:46:58,009 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-14 02:46:58,009 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-14 02:46:58,010 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 02:46:57" (1/1) ... [2024-11-14 02:46:58,019 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2024-11-14 02:46:58,036 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a212249-a434-4a09-81a1-7d2fb865d855/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 02:46:58,053 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a212249-a434-4a09-81a1-7d2fb865d855/bin/utaipan-verify-sOmjnqqW8E/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2024-11-14 02:46:58,058 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a212249-a434-4a09-81a1-7d2fb865d855/bin/utaipan-verify-sOmjnqqW8E/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2024-11-14 02:46:58,084 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-14 02:46:58,084 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2024-11-14 02:46:58,084 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-14 02:46:58,085 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-14 02:46:58,190 INFO L238 CfgBuilder]: Building ICFG [2024-11-14 02:46:58,192 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-14 02:47:00,637 INFO L? ?]: Removed 147 outVars from TransFormulas that were not future-live. [2024-11-14 02:47:00,637 INFO L287 CfgBuilder]: Performing block encoding [2024-11-14 02:47:01,125 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-14 02:47:01,126 INFO L316 CfgBuilder]: Removed 1 assume(true) statements. [2024-11-14 02:47:01,126 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.11 02:47:01 BoogieIcfgContainer [2024-11-14 02:47:01,126 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-14 02:47:01,128 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-14 02:47:01,129 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-14 02:47:01,135 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-14 02:47:01,135 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.11 02:46:56" (1/3) ... [2024-11-14 02:47:01,136 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1127f97b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.11 02:47:01, skipping insertion in model container [2024-11-14 02:47:01,136 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 02:46:57" (2/3) ... [2024-11-14 02:47:01,137 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1127f97b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.11 02:47:01, skipping insertion in model container [2024-11-14 02:47:01,137 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.11 02:47:01" (3/3) ... [2024-11-14 02:47:01,138 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem03_label06.c [2024-11-14 02:47:01,156 INFO L217 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-14 02:47:01,159 INFO L154 ceAbstractionStarter]: Applying trace abstraction to ICFG Problem03_label06.c that has 1 procedures, 148 locations, 1 initial locations, 1 loop locations, and 1 error locations. [2024-11-14 02:47:01,233 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-14 02:47:01,248 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;@68e94ca, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-14 02:47:01,249 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-11-14 02:47:01,255 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 02:47:01,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2024-11-14 02:47:01,267 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 02:47:01,268 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 02:47:01,268 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 02:47:01,272 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 02:47:01,273 INFO L85 PathProgramCache]: Analyzing trace with hash 425809233, now seen corresponding path program 1 times [2024-11-14 02:47:01,281 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 02:47:01,282 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1434897361] [2024-11-14 02:47:01,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 02:47:01,283 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 02:47:01,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 02:47:02,681 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 02:47:02,683 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 02:47:02,683 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1434897361] [2024-11-14 02:47:02,684 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1434897361] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 02:47:02,684 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-14 02:47:02,684 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-14 02:47:02,686 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [953807594] [2024-11-14 02:47:02,686 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 02:47:02,693 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-14 02:47:02,695 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 02:47:02,718 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-14 02:47:02,719 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-14 02:47:02,724 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 02:47:03,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 02:47:03,837 INFO L93 Difference]: Finished difference Result 440 states and 860 transitions. [2024-11-14 02:47:03,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-14 02:47:03,840 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 02:47:03,841 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 02:47:03,854 INFO L225 Difference]: With dead ends: 440 [2024-11-14 02:47:03,854 INFO L226 Difference]: Without dead ends: 289 [2024-11-14 02:47:03,858 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 02:47:03,860 INFO L432 NwaCegarLoop]: 17 mSDtfsCounter, 11 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 478 mSolverCounterSat, 147 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 625 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 147 IncrementalHoareTripleChecker+Valid, 478 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2024-11-14 02:47:03,861 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 22 Invalid, 625 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [147 Valid, 478 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2024-11-14 02:47:03,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 289 states. [2024-11-14 02:47:03,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 289 to 289. [2024-11-14 02:47:03,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 289 states, 288 states have (on average 1.9270833333333333) internal successors, (555), 288 states have internal predecessors, (555), 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 02:47:03,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 289 states to 289 states and 555 transitions. [2024-11-14 02:47:03,932 INFO L78 Accepts]: Start accepts. Automaton has 289 states and 555 transitions. Word has length 143 [2024-11-14 02:47:03,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 02:47:03,934 INFO L471 AbstractCegarLoop]: Abstraction has 289 states and 555 transitions. [2024-11-14 02:47:03,934 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 02:47:03,934 INFO L276 IsEmpty]: Start isEmpty. Operand 289 states and 555 transitions. [2024-11-14 02:47:03,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2024-11-14 02:47:03,937 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 02:47:03,941 INFO L215 NwaCegarLoop]: trace histogram [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, 1] [2024-11-14 02:47:03,941 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-14 02:47:03,942 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 02:47:03,942 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 02:47:03,942 INFO L85 PathProgramCache]: Analyzing trace with hash -1513376891, now seen corresponding path program 1 times [2024-11-14 02:47:03,942 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 02:47:03,942 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1710101833] [2024-11-14 02:47:03,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 02:47:03,943 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 02:47:04,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 02:47:04,734 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 02:47:04,734 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 02:47:04,734 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1710101833] [2024-11-14 02:47:04,734 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1710101833] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 02:47:04,734 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-14 02:47:04,735 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-14 02:47:04,735 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [315766271] [2024-11-14 02:47:04,735 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 02:47:04,736 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-14 02:47:04,736 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 02:47:04,738 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-14 02:47:04,738 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-14 02:47:04,739 INFO L87 Difference]: Start difference. First operand 289 states and 555 transitions. Second operand has 3 states, 3 states have (on average 49.0) internal successors, (147), 2 states have internal predecessors, (147), 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 02:47:05,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 02:47:05,625 INFO L93 Difference]: Finished difference Result 865 states and 1663 transitions. [2024-11-14 02:47:05,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-14 02:47:05,626 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 49.0) internal successors, (147), 2 states have internal predecessors, (147), 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 147 [2024-11-14 02:47:05,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 02:47:05,629 INFO L225 Difference]: With dead ends: 865 [2024-11-14 02:47:05,630 INFO L226 Difference]: Without dead ends: 577 [2024-11-14 02:47:05,632 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 02:47:05,634 INFO L432 NwaCegarLoop]: 45 mSDtfsCounter, 149 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 525 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 149 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 584 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 525 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2024-11-14 02:47:05,634 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [149 Valid, 49 Invalid, 584 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 525 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2024-11-14 02:47:05,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 577 states. [2024-11-14 02:47:05,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 577 to 575. [2024-11-14 02:47:05,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 575 states, 574 states have (on average 1.8083623693379791) internal successors, (1038), 574 states have internal predecessors, (1038), 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 02:47:05,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 575 states to 575 states and 1038 transitions. [2024-11-14 02:47:05,681 INFO L78 Accepts]: Start accepts. Automaton has 575 states and 1038 transitions. Word has length 147 [2024-11-14 02:47:05,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 02:47:05,681 INFO L471 AbstractCegarLoop]: Abstraction has 575 states and 1038 transitions. [2024-11-14 02:47:05,681 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 49.0) internal successors, (147), 2 states have internal predecessors, (147), 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 02:47:05,682 INFO L276 IsEmpty]: Start isEmpty. Operand 575 states and 1038 transitions. [2024-11-14 02:47:05,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2024-11-14 02:47:05,688 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 02:47:05,688 INFO L215 NwaCegarLoop]: trace histogram [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, 1, 1] [2024-11-14 02:47:05,688 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-14 02:47:05,691 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 02:47:05,692 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 02:47:05,692 INFO L85 PathProgramCache]: Analyzing trace with hash 1858200725, now seen corresponding path program 1 times [2024-11-14 02:47:05,692 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 02:47:05,692 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1601396907] [2024-11-14 02:47:05,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 02:47:05,692 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 02:47:05,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 02:47:06,057 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 02:47:06,058 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 02:47:06,058 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1601396907] [2024-11-14 02:47:06,058 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1601396907] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 02:47:06,058 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-14 02:47:06,058 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-14 02:47:06,058 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1935089008] [2024-11-14 02:47:06,058 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 02:47:06,059 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-14 02:47:06,059 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 02:47:06,060 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-14 02:47:06,060 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-14 02:47:06,060 INFO L87 Difference]: Start difference. First operand 575 states and 1038 transitions. Second operand has 3 states, 3 states have (on average 49.666666666666664) internal successors, (149), 2 states have internal predecessors, (149), 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 02:47:07,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 02:47:07,039 INFO L93 Difference]: Finished difference Result 1721 states and 3111 transitions. [2024-11-14 02:47:07,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-14 02:47:07,040 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 49.666666666666664) internal successors, (149), 2 states have internal predecessors, (149), 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 149 [2024-11-14 02:47:07,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 02:47:07,045 INFO L225 Difference]: With dead ends: 1721 [2024-11-14 02:47:07,045 INFO L226 Difference]: Without dead ends: 1147 [2024-11-14 02:47:07,046 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 02:47:07,047 INFO L432 NwaCegarLoop]: 98 mSDtfsCounter, 150 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 456 mSolverCounterSat, 123 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 150 SdHoareTripleChecker+Valid, 102 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 02:47:07,047 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [150 Valid, 102 Invalid, 579 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [123 Valid, 456 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2024-11-14 02:47:07,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1147 states. [2024-11-14 02:47:07,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1147 to 1147. [2024-11-14 02:47:07,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1147 states, 1146 states have (on average 1.5095986038394416) internal successors, (1730), 1146 states have internal predecessors, (1730), 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 02:47:07,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1147 states to 1147 states and 1730 transitions. [2024-11-14 02:47:07,088 INFO L78 Accepts]: Start accepts. Automaton has 1147 states and 1730 transitions. Word has length 149 [2024-11-14 02:47:07,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 02:47:07,088 INFO L471 AbstractCegarLoop]: Abstraction has 1147 states and 1730 transitions. [2024-11-14 02:47:07,088 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 49.666666666666664) internal successors, (149), 2 states have internal predecessors, (149), 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 02:47:07,089 INFO L276 IsEmpty]: Start isEmpty. Operand 1147 states and 1730 transitions. [2024-11-14 02:47:07,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2024-11-14 02:47:07,092 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 02:47:07,092 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 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 02:47:07,096 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-11-14 02:47:07,096 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 02:47:07,096 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 02:47:07,097 INFO L85 PathProgramCache]: Analyzing trace with hash 1458775588, now seen corresponding path program 1 times [2024-11-14 02:47:07,097 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 02:47:07,097 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [591754963] [2024-11-14 02:47:07,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 02:47:07,098 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 02:47:07,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 02:47:07,294 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-14 02:47:07,294 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 02:47:07,294 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [591754963] [2024-11-14 02:47:07,296 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [591754963] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 02:47:07,296 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-14 02:47:07,296 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-14 02:47:07,296 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [437981152] [2024-11-14 02:47:07,296 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 02:47:07,297 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-14 02:47:07,297 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 02:47:07,297 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-14 02:47:07,297 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-14 02:47:07,298 INFO L87 Difference]: Start difference. First operand 1147 states and 1730 transitions. Second operand has 3 states, 3 states have (on average 50.666666666666664) internal successors, (152), 2 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 02:47:08,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 02:47:08,211 INFO L93 Difference]: Finished difference Result 3151 states and 4846 transitions. [2024-11-14 02:47:08,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-14 02:47:08,212 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 50.666666666666664) internal successors, (152), 2 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 155 [2024-11-14 02:47:08,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 02:47:08,219 INFO L225 Difference]: With dead ends: 3151 [2024-11-14 02:47:08,220 INFO L226 Difference]: Without dead ends: 2005 [2024-11-14 02:47:08,221 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 02:47:08,222 INFO L432 NwaCegarLoop]: 26 mSDtfsCounter, 156 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 453 mSolverCounterSat, 167 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 156 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 620 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 167 IncrementalHoareTripleChecker+Valid, 453 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2024-11-14 02:47:08,222 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [156 Valid, 30 Invalid, 620 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [167 Valid, 453 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2024-11-14 02:47:08,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2005 states. [2024-11-14 02:47:08,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2005 to 2005. [2024-11-14 02:47:08,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2005 states, 2004 states have (on average 1.5164670658682635) internal successors, (3039), 2004 states have internal predecessors, (3039), 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 02:47:08,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2005 states to 2005 states and 3039 transitions. [2024-11-14 02:47:08,281 INFO L78 Accepts]: Start accepts. Automaton has 2005 states and 3039 transitions. Word has length 155 [2024-11-14 02:47:08,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 02:47:08,281 INFO L471 AbstractCegarLoop]: Abstraction has 2005 states and 3039 transitions. [2024-11-14 02:47:08,281 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 50.666666666666664) internal successors, (152), 2 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 02:47:08,282 INFO L276 IsEmpty]: Start isEmpty. Operand 2005 states and 3039 transitions. [2024-11-14 02:47:08,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 172 [2024-11-14 02:47:08,291 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 02:47:08,291 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 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] [2024-11-14 02:47:08,292 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-11-14 02:47:08,292 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 02:47:08,292 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 02:47:08,292 INFO L85 PathProgramCache]: Analyzing trace with hash 600996163, now seen corresponding path program 1 times [2024-11-14 02:47:08,292 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 02:47:08,292 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [929174449] [2024-11-14 02:47:08,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 02:47:08,293 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 02:47:08,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 02:47:08,663 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 41 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-14 02:47:08,663 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 02:47:08,663 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [929174449] [2024-11-14 02:47:08,663 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [929174449] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 02:47:08,664 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-14 02:47:08,664 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-14 02:47:08,664 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1602254200] [2024-11-14 02:47:08,664 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 02:47:08,664 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-14 02:47:08,665 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 02:47:08,665 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-14 02:47:08,665 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-14 02:47:08,666 INFO L87 Difference]: Start difference. First operand 2005 states and 3039 transitions. Second operand has 3 states, 3 states have (on average 55.333333333333336) internal successors, (166), 3 states have internal predecessors, (166), 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 02:47:09,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 02:47:09,610 INFO L93 Difference]: Finished difference Result 5153 states and 7727 transitions. [2024-11-14 02:47:09,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-14 02:47:09,611 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 55.333333333333336) internal successors, (166), 3 states have internal predecessors, (166), 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 171 [2024-11-14 02:47:09,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 02:47:09,623 INFO L225 Difference]: With dead ends: 5153 [2024-11-14 02:47:09,624 INFO L226 Difference]: Without dead ends: 3149 [2024-11-14 02:47:09,628 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 02:47:09,629 INFO L432 NwaCegarLoop]: 221 mSDtfsCounter, 135 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 430 mSolverCounterSat, 152 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 135 SdHoareTripleChecker+Valid, 225 SdHoareTripleChecker+Invalid, 582 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 152 IncrementalHoareTripleChecker+Valid, 430 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2024-11-14 02:47:09,630 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [135 Valid, 225 Invalid, 582 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [152 Valid, 430 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2024-11-14 02:47:09,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3149 states. [2024-11-14 02:47:09,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3149 to 3149. [2024-11-14 02:47:09,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3149 states, 3148 states have (on average 1.406289707750953) internal successors, (4427), 3148 states have internal predecessors, (4427), 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 02:47:09,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3149 states to 3149 states and 4427 transitions. [2024-11-14 02:47:09,721 INFO L78 Accepts]: Start accepts. Automaton has 3149 states and 4427 transitions. Word has length 171 [2024-11-14 02:47:09,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 02:47:09,721 INFO L471 AbstractCegarLoop]: Abstraction has 3149 states and 4427 transitions. [2024-11-14 02:47:09,722 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 55.333333333333336) internal successors, (166), 3 states have internal predecessors, (166), 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 02:47:09,722 INFO L276 IsEmpty]: Start isEmpty. Operand 3149 states and 4427 transitions. [2024-11-14 02:47:09,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 177 [2024-11-14 02:47:09,729 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 02:47:09,729 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 02:47:09,729 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-11-14 02:47:09,729 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 02:47:09,730 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 02:47:09,730 INFO L85 PathProgramCache]: Analyzing trace with hash 214637761, now seen corresponding path program 1 times [2024-11-14 02:47:09,730 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 02:47:09,730 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1988762740] [2024-11-14 02:47:09,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 02:47:09,730 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 02:47:09,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 02:47:09,921 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 32 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2024-11-14 02:47:09,921 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 02:47:09,921 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1988762740] [2024-11-14 02:47:09,921 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1988762740] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 02:47:09,921 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-14 02:47:09,921 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-14 02:47:09,922 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [221999976] [2024-11-14 02:47:09,922 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 02:47:09,922 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-14 02:47:09,922 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 02:47:09,923 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-14 02:47:09,923 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-14 02:47:09,923 INFO L87 Difference]: Start difference. First operand 3149 states and 4427 transitions. Second operand has 3 states, 3 states have (on average 54.666666666666664) internal successors, (164), 2 states have internal predecessors, (164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 02:47:10,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 02:47:10,457 INFO L93 Difference]: Finished difference Result 6011 states and 8526 transitions. [2024-11-14 02:47:10,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-14 02:47:10,458 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 54.666666666666664) internal successors, (164), 2 states have internal predecessors, (164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 176 [2024-11-14 02:47:10,458 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 02:47:10,472 INFO L225 Difference]: With dead ends: 6011 [2024-11-14 02:47:10,473 INFO L226 Difference]: Without dead ends: 3149 [2024-11-14 02:47:10,477 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 02:47:10,478 INFO L432 NwaCegarLoop]: 4 mSDtfsCounter, 240 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 265 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 240 SdHoareTripleChecker+Valid, 4 SdHoareTripleChecker+Invalid, 288 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 265 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-11-14 02:47:10,480 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [240 Valid, 4 Invalid, 288 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 265 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-11-14 02:47:10,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3149 states. [2024-11-14 02:47:10,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3149 to 3149. [2024-11-14 02:47:10,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3149 states, 3148 states have (on average 1.3681702668360864) internal successors, (4307), 3148 states have internal predecessors, (4307), 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 02:47:10,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3149 states to 3149 states and 4307 transitions. [2024-11-14 02:47:10,588 INFO L78 Accepts]: Start accepts. Automaton has 3149 states and 4307 transitions. Word has length 176 [2024-11-14 02:47:10,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 02:47:10,589 INFO L471 AbstractCegarLoop]: Abstraction has 3149 states and 4307 transitions. [2024-11-14 02:47:10,589 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 54.666666666666664) internal successors, (164), 2 states have internal predecessors, (164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 02:47:10,589 INFO L276 IsEmpty]: Start isEmpty. Operand 3149 states and 4307 transitions. [2024-11-14 02:47:10,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 185 [2024-11-14 02:47:10,598 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 02:47:10,598 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:47:10,598 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-11-14 02:47:10,599 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 02:47:10,600 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 02:47:10,600 INFO L85 PathProgramCache]: Analyzing trace with hash -334763637, now seen corresponding path program 1 times [2024-11-14 02:47:10,600 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 02:47:10,600 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2063010962] [2024-11-14 02:47:10,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 02:47:10,600 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 02:47:10,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 02:47:10,904 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 54 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-14 02:47:10,904 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 02:47:10,904 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2063010962] [2024-11-14 02:47:10,905 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2063010962] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 02:47:10,905 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-14 02:47:10,905 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-14 02:47:10,905 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1781968776] [2024-11-14 02:47:10,905 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 02:47:10,905 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-14 02:47:10,906 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 02:47:10,906 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-14 02:47:10,906 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-14 02:47:10,907 INFO L87 Difference]: Start difference. First operand 3149 states and 4307 transitions. Second operand has 3 states, 3 states have (on average 59.666666666666664) internal successors, (179), 3 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 02:47:11,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 02:47:11,772 INFO L93 Difference]: Finished difference Result 7727 states and 10988 transitions. [2024-11-14 02:47:11,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-14 02:47:11,773 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 59.666666666666664) internal successors, (179), 3 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 184 [2024-11-14 02:47:11,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 02:47:11,790 INFO L225 Difference]: With dead ends: 7727 [2024-11-14 02:47:11,790 INFO L226 Difference]: Without dead ends: 4865 [2024-11-14 02:47:11,794 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 02:47:11,795 INFO L432 NwaCegarLoop]: 255 mSDtfsCounter, 128 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 380 mSolverCounterSat, 159 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 128 SdHoareTripleChecker+Valid, 258 SdHoareTripleChecker+Invalid, 539 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 159 IncrementalHoareTripleChecker+Valid, 380 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2024-11-14 02:47:11,796 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [128 Valid, 258 Invalid, 539 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [159 Valid, 380 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2024-11-14 02:47:11,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4865 states. [2024-11-14 02:47:11,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4865 to 4293. [2024-11-14 02:47:11,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4293 states, 4292 states have (on average 1.3068499534016775) internal successors, (5609), 4292 states have internal predecessors, (5609), 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 02:47:11,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4293 states to 4293 states and 5609 transitions. [2024-11-14 02:47:11,910 INFO L78 Accepts]: Start accepts. Automaton has 4293 states and 5609 transitions. Word has length 184 [2024-11-14 02:47:11,910 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 02:47:11,911 INFO L471 AbstractCegarLoop]: Abstraction has 4293 states and 5609 transitions. [2024-11-14 02:47:11,912 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 59.666666666666664) internal successors, (179), 3 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 02:47:11,912 INFO L276 IsEmpty]: Start isEmpty. Operand 4293 states and 5609 transitions. [2024-11-14 02:47:11,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 212 [2024-11-14 02:47:11,918 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 02:47:11,918 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, 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] [2024-11-14 02:47:11,919 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-11-14 02:47:11,919 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 02:47:11,919 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 02:47:11,920 INFO L85 PathProgramCache]: Analyzing trace with hash 1968075990, now seen corresponding path program 1 times [2024-11-14 02:47:11,920 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 02:47:11,920 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2132833729] [2024-11-14 02:47:11,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 02:47:11,920 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 02:47:11,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 02:47:12,387 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 73 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-11-14 02:47:12,388 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 02:47:12,388 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2132833729] [2024-11-14 02:47:12,388 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2132833729] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 02:47:12,388 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [806304261] [2024-11-14 02:47:12,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 02:47:12,388 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 02:47:12,389 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a212249-a434-4a09-81a1-7d2fb865d855/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 02:47:12,391 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a212249-a434-4a09-81a1-7d2fb865d855/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 02:47:12,393 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a212249-a434-4a09-81a1-7d2fb865d855/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-14 02:47:12,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 02:47:12,610 INFO L255 TraceCheckSpWp]: Trace formula consists of 463 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-11-14 02:47:12,623 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 02:47:12,905 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 67 proven. 0 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2024-11-14 02:47:12,905 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-14 02:47:12,906 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [806304261] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 02:47:12,906 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-14 02:47:12,906 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2024-11-14 02:47:12,907 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1557640268] [2024-11-14 02:47:12,907 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 02:47:12,907 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-14 02:47:12,907 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 02:47:12,908 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-14 02:47:12,908 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-14 02:47:12,908 INFO L87 Difference]: Start difference. First operand 4293 states and 5609 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 02:47:13,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 02:47:13,789 INFO L93 Difference]: Finished difference Result 10730 states and 14129 transitions. [2024-11-14 02:47:13,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-14 02:47:13,790 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 211 [2024-11-14 02:47:13,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 02:47:13,810 INFO L225 Difference]: With dead ends: 10730 [2024-11-14 02:47:13,810 INFO L226 Difference]: Without dead ends: 6581 [2024-11-14 02:47:13,815 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 213 GetRequests, 210 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-14 02:47:13,815 INFO L432 NwaCegarLoop]: 87 mSDtfsCounter, 32 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 521 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 91 SdHoareTripleChecker+Invalid, 568 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 521 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2024-11-14 02:47:13,816 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [32 Valid, 91 Invalid, 568 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 521 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2024-11-14 02:47:13,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6581 states. [2024-11-14 02:47:14,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6581 to 6581. [2024-11-14 02:47:14,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6581 states, 6580 states have (on average 1.2864741641337385) internal successors, (8465), 6580 states have internal predecessors, (8465), 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 02:47:14,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6581 states to 6581 states and 8465 transitions. [2024-11-14 02:47:14,046 INFO L78 Accepts]: Start accepts. Automaton has 6581 states and 8465 transitions. Word has length 211 [2024-11-14 02:47:14,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 02:47:14,047 INFO L471 AbstractCegarLoop]: Abstraction has 6581 states and 8465 transitions. [2024-11-14 02:47:14,047 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 02:47:14,047 INFO L276 IsEmpty]: Start isEmpty. Operand 6581 states and 8465 transitions. [2024-11-14 02:47:14,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 249 [2024-11-14 02:47:14,060 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 02:47:14,060 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 02:47:14,081 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a212249-a434-4a09-81a1-7d2fb865d855/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-11-14 02:47:14,263 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a212249-a434-4a09-81a1-7d2fb865d855/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2024-11-14 02:47:14,264 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 02:47:14,264 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 02:47:14,265 INFO L85 PathProgramCache]: Analyzing trace with hash -1073499567, now seen corresponding path program 1 times [2024-11-14 02:47:14,265 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 02:47:14,265 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1909248458] [2024-11-14 02:47:14,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 02:47:14,267 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 02:47:14,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 02:47:14,589 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 134 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 02:47:14,589 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 02:47:14,589 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1909248458] [2024-11-14 02:47:14,589 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1909248458] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 02:47:14,589 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-14 02:47:14,589 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-14 02:47:14,589 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [744924126] [2024-11-14 02:47:14,589 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 02:47:14,590 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-14 02:47:14,590 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 02:47:14,590 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-14 02:47:14,590 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-14 02:47:14,590 INFO L87 Difference]: Start difference. First operand 6581 states and 8465 transitions. Second operand has 3 states, 3 states have (on average 82.66666666666667) internal successors, (248), 3 states have internal predecessors, (248), 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 02:47:15,509 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 02:47:15,509 INFO L93 Difference]: Finished difference Result 16164 states and 20879 transitions. [2024-11-14 02:47:15,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-14 02:47:15,510 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 82.66666666666667) internal successors, (248), 3 states have internal predecessors, (248), 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 248 [2024-11-14 02:47:15,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 02:47:15,539 INFO L225 Difference]: With dead ends: 16164 [2024-11-14 02:47:15,539 INFO L226 Difference]: Without dead ends: 9727 [2024-11-14 02:47:15,545 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 02:47:15,546 INFO L432 NwaCegarLoop]: 200 mSDtfsCounter, 102 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 437 mSolverCounterSat, 117 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 102 SdHoareTripleChecker+Valid, 204 SdHoareTripleChecker+Invalid, 554 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 117 IncrementalHoareTripleChecker+Valid, 437 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2024-11-14 02:47:15,546 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [102 Valid, 204 Invalid, 554 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [117 Valid, 437 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2024-11-14 02:47:15,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9727 states. [2024-11-14 02:47:15,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9727 to 9441. [2024-11-14 02:47:15,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9441 states, 9440 states have (on average 1.2641949152542373) internal successors, (11934), 9440 states have internal predecessors, (11934), 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 02:47:15,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9441 states to 9441 states and 11934 transitions. [2024-11-14 02:47:15,719 INFO L78 Accepts]: Start accepts. Automaton has 9441 states and 11934 transitions. Word has length 248 [2024-11-14 02:47:15,719 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 02:47:15,719 INFO L471 AbstractCegarLoop]: Abstraction has 9441 states and 11934 transitions. [2024-11-14 02:47:15,719 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 82.66666666666667) internal successors, (248), 3 states have internal predecessors, (248), 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 02:47:15,720 INFO L276 IsEmpty]: Start isEmpty. Operand 9441 states and 11934 transitions. [2024-11-14 02:47:15,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 295 [2024-11-14 02:47:15,735 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 02:47:15,736 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, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:47:15,736 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-11-14 02:47:15,736 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 02:47:15,736 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 02:47:15,736 INFO L85 PathProgramCache]: Analyzing trace with hash 541391174, now seen corresponding path program 1 times [2024-11-14 02:47:15,737 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 02:47:15,737 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [603789342] [2024-11-14 02:47:15,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 02:47:15,737 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 02:47:15,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 02:47:16,286 INFO L134 CoverageAnalysis]: Checked inductivity of 204 backedges. 204 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 02:47:16,289 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 02:47:16,289 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [603789342] [2024-11-14 02:47:16,289 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [603789342] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 02:47:16,289 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-14 02:47:16,289 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-14 02:47:16,289 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2032802406] [2024-11-14 02:47:16,289 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 02:47:16,290 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-14 02:47:16,290 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 02:47:16,290 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-14 02:47:16,290 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-14 02:47:16,290 INFO L87 Difference]: Start difference. First operand 9441 states and 11934 transitions. Second operand has 3 states, 3 states have (on average 98.0) internal successors, (294), 3 states have internal predecessors, (294), 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 02:47:17,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 02:47:17,235 INFO L93 Difference]: Finished difference Result 19739 states and 25124 transitions. [2024-11-14 02:47:17,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-14 02:47:17,236 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 98.0) internal successors, (294), 3 states have internal predecessors, (294), 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 294 [2024-11-14 02:47:17,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 02:47:17,278 INFO L225 Difference]: With dead ends: 19739 [2024-11-14 02:47:17,278 INFO L226 Difference]: Without dead ends: 10442 [2024-11-14 02:47:17,287 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 02:47:17,288 INFO L432 NwaCegarLoop]: 243 mSDtfsCounter, 100 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 402 mSolverCounterSat, 138 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 100 SdHoareTripleChecker+Valid, 246 SdHoareTripleChecker+Invalid, 540 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 138 IncrementalHoareTripleChecker+Valid, 402 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2024-11-14 02:47:17,291 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [100 Valid, 246 Invalid, 540 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [138 Valid, 402 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2024-11-14 02:47:17,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10442 states. [2024-11-14 02:47:17,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10442 to 10013. [2024-11-14 02:47:17,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10013 states, 10012 states have (on average 1.24730323611666) internal successors, (12488), 10012 states have internal predecessors, (12488), 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 02:47:17,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10013 states to 10013 states and 12488 transitions. [2024-11-14 02:47:17,460 INFO L78 Accepts]: Start accepts. Automaton has 10013 states and 12488 transitions. Word has length 294 [2024-11-14 02:47:17,461 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 02:47:17,461 INFO L471 AbstractCegarLoop]: Abstraction has 10013 states and 12488 transitions. [2024-11-14 02:47:17,461 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 98.0) internal successors, (294), 3 states have internal predecessors, (294), 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 02:47:17,461 INFO L276 IsEmpty]: Start isEmpty. Operand 10013 states and 12488 transitions. [2024-11-14 02:47:17,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 299 [2024-11-14 02:47:17,478 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 02:47:17,478 INFO L215 NwaCegarLoop]: trace histogram [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, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:47:17,478 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-11-14 02:47:17,478 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 02:47:17,479 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 02:47:17,479 INFO L85 PathProgramCache]: Analyzing trace with hash 1231328018, now seen corresponding path program 1 times [2024-11-14 02:47:17,479 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 02:47:17,479 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1224552108] [2024-11-14 02:47:17,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 02:47:17,480 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 02:47:17,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 02:47:18,049 INFO L134 CoverageAnalysis]: Checked inductivity of 215 backedges. 160 proven. 0 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2024-11-14 02:47:18,050 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 02:47:18,050 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1224552108] [2024-11-14 02:47:18,050 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1224552108] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 02:47:18,050 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-14 02:47:18,050 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-14 02:47:18,050 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [674552180] [2024-11-14 02:47:18,051 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 02:47:18,051 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-14 02:47:18,053 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 02:47:18,053 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-14 02:47:18,053 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-14 02:47:18,054 INFO L87 Difference]: Start difference. First operand 10013 states and 12488 transitions. Second operand has 4 states, 4 states have (on average 61.0) internal successors, (244), 3 states have internal predecessors, (244), 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 02:47:19,369 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 02:47:19,369 INFO L93 Difference]: Finished difference Result 21026 states and 26171 transitions. [2024-11-14 02:47:19,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-14 02:47:19,370 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 61.0) internal successors, (244), 3 states have internal predecessors, (244), 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 298 [2024-11-14 02:47:19,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 02:47:19,393 INFO L225 Difference]: With dead ends: 21026 [2024-11-14 02:47:19,393 INFO L226 Difference]: Without dead ends: 11157 [2024-11-14 02:47:19,401 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 02:47:19,402 INFO L432 NwaCegarLoop]: 38 mSDtfsCounter, 199 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 872 mSolverCounterSat, 168 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 199 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 1040 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 168 IncrementalHoareTripleChecker+Valid, 872 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2024-11-14 02:47:19,402 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [199 Valid, 47 Invalid, 1040 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [168 Valid, 872 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2024-11-14 02:47:19,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11157 states. [2024-11-14 02:47:19,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11157 to 11014. [2024-11-14 02:47:19,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11014 states, 11013 states have (on average 1.236992645055843) internal successors, (13623), 11013 states have internal predecessors, (13623), 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 02:47:19,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11014 states to 11014 states and 13623 transitions. [2024-11-14 02:47:19,627 INFO L78 Accepts]: Start accepts. Automaton has 11014 states and 13623 transitions. Word has length 298 [2024-11-14 02:47:19,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 02:47:19,627 INFO L471 AbstractCegarLoop]: Abstraction has 11014 states and 13623 transitions. [2024-11-14 02:47:19,628 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 61.0) internal successors, (244), 3 states have internal predecessors, (244), 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 02:47:19,628 INFO L276 IsEmpty]: Start isEmpty. Operand 11014 states and 13623 transitions. [2024-11-14 02:47:19,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 303 [2024-11-14 02:47:19,646 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 02:47:19,647 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, 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, 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 02:47:19,647 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-11-14 02:47:19,647 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 02:47:19,647 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 02:47:19,648 INFO L85 PathProgramCache]: Analyzing trace with hash 1663276175, now seen corresponding path program 1 times [2024-11-14 02:47:19,648 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 02:47:19,648 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [794560794] [2024-11-14 02:47:19,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 02:47:19,648 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 02:47:19,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 02:47:20,104 INFO L134 CoverageAnalysis]: Checked inductivity of 272 backedges. 198 proven. 0 refuted. 0 times theorem prover too weak. 74 trivial. 0 not checked. [2024-11-14 02:47:20,104 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 02:47:20,104 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [794560794] [2024-11-14 02:47:20,104 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [794560794] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 02:47:20,104 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-14 02:47:20,105 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-14 02:47:20,105 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1168430829] [2024-11-14 02:47:20,105 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 02:47:20,105 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-14 02:47:20,106 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 02:47:20,106 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-14 02:47:20,106 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-14 02:47:20,106 INFO L87 Difference]: Start difference. First operand 11014 states and 13623 transitions. Second operand has 4 states, 4 states have (on average 57.25) internal successors, (229), 3 states have internal predecessors, (229), 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 02:47:21,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 02:47:21,370 INFO L93 Difference]: Finished difference Result 22170 states and 27431 transitions. [2024-11-14 02:47:21,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-14 02:47:21,371 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 57.25) internal successors, (229), 3 states have internal predecessors, (229), 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 302 [2024-11-14 02:47:21,371 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 02:47:21,394 INFO L225 Difference]: With dead ends: 22170 [2024-11-14 02:47:21,394 INFO L226 Difference]: Without dead ends: 11300 [2024-11-14 02:47:21,402 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 02:47:21,402 INFO L432 NwaCegarLoop]: 39 mSDtfsCounter, 215 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 835 mSolverCounterSat, 165 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 215 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 1000 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 165 IncrementalHoareTripleChecker+Valid, 835 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2024-11-14 02:47:21,403 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [215 Valid, 48 Invalid, 1000 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [165 Valid, 835 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2024-11-14 02:47:21,413 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11300 states. [2024-11-14 02:47:21,551 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11300 to 10728. [2024-11-14 02:47:21,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10728 states, 10727 states have (on average 1.2382772443367205) internal successors, (13283), 10727 states have internal predecessors, (13283), 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 02:47:21,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10728 states to 10728 states and 13283 transitions. [2024-11-14 02:47:21,600 INFO L78 Accepts]: Start accepts. Automaton has 10728 states and 13283 transitions. Word has length 302 [2024-11-14 02:47:21,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 02:47:21,601 INFO L471 AbstractCegarLoop]: Abstraction has 10728 states and 13283 transitions. [2024-11-14 02:47:21,601 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 57.25) internal successors, (229), 3 states have internal predecessors, (229), 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 02:47:21,601 INFO L276 IsEmpty]: Start isEmpty. Operand 10728 states and 13283 transitions. [2024-11-14 02:47:21,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 304 [2024-11-14 02:47:21,629 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 02:47:21,629 INFO L215 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 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, 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] [2024-11-14 02:47:21,629 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-11-14 02:47:21,629 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 02:47:21,630 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 02:47:21,631 INFO L85 PathProgramCache]: Analyzing trace with hash -1840977995, now seen corresponding path program 1 times [2024-11-14 02:47:21,631 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 02:47:21,631 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1181532556] [2024-11-14 02:47:21,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 02:47:21,631 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 02:47:21,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 02:47:22,122 INFO L134 CoverageAnalysis]: Checked inductivity of 264 backedges. 184 proven. 0 refuted. 0 times theorem prover too weak. 80 trivial. 0 not checked. [2024-11-14 02:47:22,122 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 02:47:22,122 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1181532556] [2024-11-14 02:47:22,122 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1181532556] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 02:47:22,122 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-14 02:47:22,122 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-14 02:47:22,123 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1726865240] [2024-11-14 02:47:22,123 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 02:47:22,123 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-14 02:47:22,123 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 02:47:22,124 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-14 02:47:22,124 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-14 02:47:22,124 INFO L87 Difference]: Start difference. First operand 10728 states and 13283 transitions. Second operand has 4 states, 4 states have (on average 56.25) internal successors, (225), 3 states have internal predecessors, (225), 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 02:47:22,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 02:47:22,996 INFO L93 Difference]: Finished difference Result 22170 states and 27589 transitions. [2024-11-14 02:47:22,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-14 02:47:22,997 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 56.25) internal successors, (225), 3 states have internal predecessors, (225), 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 303 [2024-11-14 02:47:22,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 02:47:23,017 INFO L225 Difference]: With dead ends: 22170 [2024-11-14 02:47:23,017 INFO L226 Difference]: Without dead ends: 10442 [2024-11-14 02:47:23,026 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 02:47:23,027 INFO L432 NwaCegarLoop]: 5 mSDtfsCounter, 276 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 468 mSolverCounterSat, 159 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 276 SdHoareTripleChecker+Valid, 9 SdHoareTripleChecker+Invalid, 627 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 159 IncrementalHoareTripleChecker+Valid, 468 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2024-11-14 02:47:23,027 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [276 Valid, 9 Invalid, 627 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [159 Valid, 468 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2024-11-14 02:47:23,034 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10442 states. [2024-11-14 02:47:23,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10442 to 9727. [2024-11-14 02:47:23,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9727 states, 9726 states have (on average 1.1650215916101172) internal successors, (11331), 9726 states have internal predecessors, (11331), 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 02:47:23,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9727 states to 9727 states and 11331 transitions. [2024-11-14 02:47:23,223 INFO L78 Accepts]: Start accepts. Automaton has 9727 states and 11331 transitions. Word has length 303 [2024-11-14 02:47:23,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 02:47:23,224 INFO L471 AbstractCegarLoop]: Abstraction has 9727 states and 11331 transitions. [2024-11-14 02:47:23,224 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 56.25) internal successors, (225), 3 states have internal predecessors, (225), 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 02:47:23,224 INFO L276 IsEmpty]: Start isEmpty. Operand 9727 states and 11331 transitions. [2024-11-14 02:47:23,245 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 306 [2024-11-14 02:47:23,246 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 02:47:23,246 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, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 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 02:47:23,246 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-11-14 02:47:23,246 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 02:47:23,247 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 02:47:23,247 INFO L85 PathProgramCache]: Analyzing trace with hash 1852835724, now seen corresponding path program 1 times [2024-11-14 02:47:23,247 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 02:47:23,247 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1646086960] [2024-11-14 02:47:23,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 02:47:23,247 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 02:47:23,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 02:47:23,891 INFO L134 CoverageAnalysis]: Checked inductivity of 207 backedges. 72 proven. 0 refuted. 0 times theorem prover too weak. 135 trivial. 0 not checked. [2024-11-14 02:47:23,891 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 02:47:23,892 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1646086960] [2024-11-14 02:47:23,892 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1646086960] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 02:47:23,892 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-14 02:47:23,892 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-14 02:47:23,892 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [710095096] [2024-11-14 02:47:23,892 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 02:47:23,893 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-14 02:47:23,893 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 02:47:23,894 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-14 02:47:23,894 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-14 02:47:23,894 INFO L87 Difference]: Start difference. First operand 9727 states and 11331 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 02:47:24,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 02:47:24,503 INFO L93 Difference]: Finished difference Result 20454 states and 23736 transitions. [2024-11-14 02:47:24,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-14 02:47:24,504 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 305 [2024-11-14 02:47:24,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 02:47:24,525 INFO L225 Difference]: With dead ends: 20454 [2024-11-14 02:47:24,525 INFO L226 Difference]: Without dead ends: 10871 [2024-11-14 02:47:24,531 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 02:47:24,532 INFO L432 NwaCegarLoop]: 64 mSDtfsCounter, 117 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 397 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 117 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 398 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 397 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-11-14 02:47:24,532 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [117 Valid, 68 Invalid, 398 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 397 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-11-14 02:47:24,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10871 states. [2024-11-14 02:47:24,648 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10871 to 10871. [2024-11-14 02:47:24,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10871 states, 10870 states have (on average 1.155013799448022) internal successors, (12555), 10870 states have internal predecessors, (12555), 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 02:47:24,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10871 states to 10871 states and 12555 transitions. [2024-11-14 02:47:24,671 INFO L78 Accepts]: Start accepts. Automaton has 10871 states and 12555 transitions. Word has length 305 [2024-11-14 02:47:24,672 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 02:47:24,672 INFO L471 AbstractCegarLoop]: Abstraction has 10871 states and 12555 transitions. [2024-11-14 02:47:24,672 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 02:47:24,672 INFO L276 IsEmpty]: Start isEmpty. Operand 10871 states and 12555 transitions. [2024-11-14 02:47:24,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 310 [2024-11-14 02:47:24,684 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 02:47:24,684 INFO L215 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:47:24,684 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-11-14 02:47:24,684 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 02:47:24,684 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 02:47:24,685 INFO L85 PathProgramCache]: Analyzing trace with hash -1034583009, now seen corresponding path program 1 times [2024-11-14 02:47:24,685 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 02:47:24,685 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [784007076] [2024-11-14 02:47:24,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 02:47:24,685 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 02:47:24,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 02:47:25,256 INFO L134 CoverageAnalysis]: Checked inductivity of 299 backedges. 111 proven. 6 refuted. 0 times theorem prover too weak. 182 trivial. 0 not checked. [2024-11-14 02:47:25,256 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 02:47:25,256 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [784007076] [2024-11-14 02:47:25,256 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [784007076] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 02:47:25,257 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1988300936] [2024-11-14 02:47:25,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 02:47:25,257 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 02:47:25,257 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a212249-a434-4a09-81a1-7d2fb865d855/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 02:47:25,259 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a212249-a434-4a09-81a1-7d2fb865d855/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 02:47:25,261 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a212249-a434-4a09-81a1-7d2fb865d855/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-14 02:47:25,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 02:47:25,515 INFO L255 TraceCheckSpWp]: Trace formula consists of 603 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-11-14 02:47:25,521 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 02:47:25,740 INFO L134 CoverageAnalysis]: Checked inductivity of 299 backedges. 239 proven. 0 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2024-11-14 02:47:25,740 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-14 02:47:25,740 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1988300936] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 02:47:25,740 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-14 02:47:25,740 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2024-11-14 02:47:25,740 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [833778408] [2024-11-14 02:47:25,741 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 02:47:25,741 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-14 02:47:25,741 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 02:47:25,742 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-14 02:47:25,742 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-14 02:47:25,742 INFO L87 Difference]: Start difference. First operand 10871 states and 12555 transitions. Second operand has 3 states, 3 states have (on average 83.66666666666667) internal successors, (251), 3 states have internal predecessors, (251), 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 02:47:26,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 02:47:26,378 INFO L93 Difference]: Finished difference Result 21884 states and 25506 transitions. [2024-11-14 02:47:26,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-14 02:47:26,379 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 83.66666666666667) internal successors, (251), 3 states have internal predecessors, (251), 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 309 [2024-11-14 02:47:26,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 02:47:26,404 INFO L225 Difference]: With dead ends: 21884 [2024-11-14 02:47:26,404 INFO L226 Difference]: Without dead ends: 12301 [2024-11-14 02:47:26,410 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 311 GetRequests, 308 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 02:47:26,411 INFO L432 NwaCegarLoop]: 212 mSDtfsCounter, 79 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 375 mSolverCounterSat, 87 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 79 SdHoareTripleChecker+Valid, 215 SdHoareTripleChecker+Invalid, 462 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 87 IncrementalHoareTripleChecker+Valid, 375 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-11-14 02:47:26,411 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [79 Valid, 215 Invalid, 462 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [87 Valid, 375 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-11-14 02:47:26,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12301 states. [2024-11-14 02:47:26,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12301 to 11872. [2024-11-14 02:47:26,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11872 states, 11871 states have (on average 1.1406789655462892) internal successors, (13541), 11871 states have internal predecessors, (13541), 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 02:47:26,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11872 states to 11872 states and 13541 transitions. [2024-11-14 02:47:26,563 INFO L78 Accepts]: Start accepts. Automaton has 11872 states and 13541 transitions. Word has length 309 [2024-11-14 02:47:26,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 02:47:26,564 INFO L471 AbstractCegarLoop]: Abstraction has 11872 states and 13541 transitions. [2024-11-14 02:47:26,564 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 83.66666666666667) internal successors, (251), 3 states have internal predecessors, (251), 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 02:47:26,564 INFO L276 IsEmpty]: Start isEmpty. Operand 11872 states and 13541 transitions. [2024-11-14 02:47:26,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 327 [2024-11-14 02:47:26,574 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 02:47:26,574 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, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 02:47:26,594 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a212249-a434-4a09-81a1-7d2fb865d855/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-11-14 02:47:26,774 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a212249-a434-4a09-81a1-7d2fb865d855/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2024-11-14 02:47:26,775 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 02:47:26,775 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 02:47:26,775 INFO L85 PathProgramCache]: Analyzing trace with hash 2091572631, now seen corresponding path program 1 times [2024-11-14 02:47:26,775 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 02:47:26,776 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [190564832] [2024-11-14 02:47:26,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 02:47:26,776 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 02:47:26,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 02:47:28,866 INFO L134 CoverageAnalysis]: Checked inductivity of 249 backedges. 182 proven. 67 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 02:47:28,866 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 02:47:28,867 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [190564832] [2024-11-14 02:47:28,867 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [190564832] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 02:47:28,867 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [784827833] [2024-11-14 02:47:28,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 02:47:28,867 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 02:47:28,867 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a212249-a434-4a09-81a1-7d2fb865d855/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 02:47:28,869 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a212249-a434-4a09-81a1-7d2fb865d855/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 02:47:28,872 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a212249-a434-4a09-81a1-7d2fb865d855/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-14 02:47:29,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 02:47:29,120 INFO L255 TraceCheckSpWp]: Trace formula consists of 574 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-11-14 02:47:29,126 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 02:47:29,336 INFO L134 CoverageAnalysis]: Checked inductivity of 249 backedges. 182 proven. 0 refuted. 0 times theorem prover too weak. 67 trivial. 0 not checked. [2024-11-14 02:47:29,337 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-14 02:47:29,337 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [784827833] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 02:47:29,337 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-14 02:47:29,337 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 7 [2024-11-14 02:47:29,337 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [750816313] [2024-11-14 02:47:29,337 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 02:47:29,338 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-14 02:47:29,338 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 02:47:29,338 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-14 02:47:29,338 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2024-11-14 02:47:29,339 INFO L87 Difference]: Start difference. First operand 11872 states and 13541 transitions. Second operand has 3 states, 3 states have (on average 89.0) internal successors, (267), 3 states have internal predecessors, (267), 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 02:47:30,051 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 02:47:30,051 INFO L93 Difference]: Finished difference Result 27604 states and 31483 transitions. [2024-11-14 02:47:30,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-14 02:47:30,052 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 89.0) internal successors, (267), 3 states have internal predecessors, (267), 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 326 [2024-11-14 02:47:30,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 02:47:30,068 INFO L225 Difference]: With dead ends: 27604 [2024-11-14 02:47:30,069 INFO L226 Difference]: Without dead ends: 16305 [2024-11-14 02:47:30,077 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 331 GetRequests, 326 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2024-11-14 02:47:30,078 INFO L432 NwaCegarLoop]: 65 mSDtfsCounter, 20 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 421 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 69 SdHoareTripleChecker+Invalid, 471 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 421 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-11-14 02:47:30,078 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 69 Invalid, 471 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 421 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-11-14 02:47:30,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16305 states. [2024-11-14 02:47:30,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16305 to 15733. [2024-11-14 02:47:30,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15733 states, 15732 states have (on average 1.1283371472158656) internal successors, (17751), 15732 states have internal predecessors, (17751), 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 02:47:30,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15733 states to 15733 states and 17751 transitions. [2024-11-14 02:47:30,273 INFO L78 Accepts]: Start accepts. Automaton has 15733 states and 17751 transitions. Word has length 326 [2024-11-14 02:47:30,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 02:47:30,274 INFO L471 AbstractCegarLoop]: Abstraction has 15733 states and 17751 transitions. [2024-11-14 02:47:30,274 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 89.0) internal successors, (267), 3 states have internal predecessors, (267), 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 02:47:30,274 INFO L276 IsEmpty]: Start isEmpty. Operand 15733 states and 17751 transitions. [2024-11-14 02:47:30,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 339 [2024-11-14 02:47:30,287 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 02:47:30,288 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 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 02:47:30,307 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a212249-a434-4a09-81a1-7d2fb865d855/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-11-14 02:47:30,488 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a212249-a434-4a09-81a1-7d2fb865d855/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2024-11-14 02:47:30,488 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 02:47:30,489 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 02:47:30,489 INFO L85 PathProgramCache]: Analyzing trace with hash -777243847, now seen corresponding path program 1 times [2024-11-14 02:47:30,489 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 02:47:30,489 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [696262529] [2024-11-14 02:47:30,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 02:47:30,489 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 02:47:30,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 02:47:31,423 INFO L134 CoverageAnalysis]: Checked inductivity of 267 backedges. 146 proven. 0 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2024-11-14 02:47:31,424 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 02:47:31,424 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [696262529] [2024-11-14 02:47:31,424 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [696262529] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 02:47:31,424 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-14 02:47:31,424 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-14 02:47:31,424 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [891372525] [2024-11-14 02:47:31,424 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 02:47:31,425 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-14 02:47:31,425 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 02:47:31,425 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-14 02:47:31,425 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-14 02:47:31,426 INFO L87 Difference]: Start difference. First operand 15733 states and 17751 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 02:47:32,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 02:47:32,026 INFO L93 Difference]: Finished difference Result 30178 states and 34109 transitions. [2024-11-14 02:47:32,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-14 02:47:32,026 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 338 [2024-11-14 02:47:32,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 02:47:32,039 INFO L225 Difference]: With dead ends: 30178 [2024-11-14 02:47:32,039 INFO L226 Difference]: Without dead ends: 15304 [2024-11-14 02:47:32,046 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 02:47:32,047 INFO L432 NwaCegarLoop]: 68 mSDtfsCounter, 72 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 385 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 72 SdHoareTripleChecker+Invalid, 386 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 385 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-11-14 02:47:32,047 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [72 Valid, 72 Invalid, 386 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 385 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-11-14 02:47:32,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15304 states. [2024-11-14 02:47:32,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15304 to 15304. [2024-11-14 02:47:32,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15304 states, 15303 states have (on average 1.1295170881526497) internal successors, (17285), 15303 states have internal predecessors, (17285), 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 02:47:32,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15304 states to 15304 states and 17285 transitions. [2024-11-14 02:47:32,243 INFO L78 Accepts]: Start accepts. Automaton has 15304 states and 17285 transitions. Word has length 338 [2024-11-14 02:47:32,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 02:47:32,244 INFO L471 AbstractCegarLoop]: Abstraction has 15304 states and 17285 transitions. [2024-11-14 02:47:32,244 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 02:47:32,244 INFO L276 IsEmpty]: Start isEmpty. Operand 15304 states and 17285 transitions. [2024-11-14 02:47:32,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 346 [2024-11-14 02:47:32,257 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 02:47:32,258 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, 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, 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] [2024-11-14 02:47:32,258 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-11-14 02:47:32,258 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 02:47:32,258 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 02:47:32,259 INFO L85 PathProgramCache]: Analyzing trace with hash 1254096417, now seen corresponding path program 1 times [2024-11-14 02:47:32,259 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 02:47:32,259 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [161720486] [2024-11-14 02:47:32,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 02:47:32,259 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 02:47:32,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 02:47:32,752 INFO L134 CoverageAnalysis]: Checked inductivity of 287 backedges. 281 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-14 02:47:32,753 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 02:47:32,753 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [161720486] [2024-11-14 02:47:32,753 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [161720486] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 02:47:32,753 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-14 02:47:32,753 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-14 02:47:32,753 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [467024500] [2024-11-14 02:47:32,753 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 02:47:32,754 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-14 02:47:32,754 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 02:47:32,754 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-14 02:47:32,755 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-14 02:47:32,755 INFO L87 Difference]: Start difference. First operand 15304 states and 17285 transitions. Second operand has 3 states, 3 states have (on average 113.33333333333333) internal successors, (340), 3 states have internal predecessors, (340), 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 02:47:33,533 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 02:47:33,534 INFO L93 Difference]: Finished difference Result 31036 states and 35113 transitions. [2024-11-14 02:47:33,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-14 02:47:33,534 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 113.33333333333333) internal successors, (340), 3 states have internal predecessors, (340), 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 345 [2024-11-14 02:47:33,535 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 02:47:33,554 INFO L225 Difference]: With dead ends: 31036 [2024-11-14 02:47:33,554 INFO L226 Difference]: Without dead ends: 16591 [2024-11-14 02:47:33,564 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 02:47:33,565 INFO L432 NwaCegarLoop]: 170 mSDtfsCounter, 80 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 384 mSolverCounterSat, 91 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 80 SdHoareTripleChecker+Valid, 173 SdHoareTripleChecker+Invalid, 475 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 91 IncrementalHoareTripleChecker+Valid, 384 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-11-14 02:47:33,565 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [80 Valid, 173 Invalid, 475 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [91 Valid, 384 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-11-14 02:47:33,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16591 states. [2024-11-14 02:47:33,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16591 to 16019. [2024-11-14 02:47:33,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16019 states, 16018 states have (on average 1.1219877637657636) internal successors, (17972), 16018 states have internal predecessors, (17972), 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 02:47:33,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16019 states to 16019 states and 17972 transitions. [2024-11-14 02:47:33,870 INFO L78 Accepts]: Start accepts. Automaton has 16019 states and 17972 transitions. Word has length 345 [2024-11-14 02:47:33,871 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 02:47:33,871 INFO L471 AbstractCegarLoop]: Abstraction has 16019 states and 17972 transitions. [2024-11-14 02:47:33,871 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 113.33333333333333) internal successors, (340), 3 states have internal predecessors, (340), 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 02:47:33,871 INFO L276 IsEmpty]: Start isEmpty. Operand 16019 states and 17972 transitions. [2024-11-14 02:47:33,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 349 [2024-11-14 02:47:33,891 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 02:47:33,891 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, 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, 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] [2024-11-14 02:47:33,891 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-11-14 02:47:33,892 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 02:47:33,892 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 02:47:33,892 INFO L85 PathProgramCache]: Analyzing trace with hash 234111090, now seen corresponding path program 1 times [2024-11-14 02:47:33,892 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 02:47:33,892 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [696041107] [2024-11-14 02:47:33,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 02:47:33,892 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 02:47:33,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 02:47:34,382 INFO L134 CoverageAnalysis]: Checked inductivity of 293 backedges. 287 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-14 02:47:34,382 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 02:47:34,382 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [696041107] [2024-11-14 02:47:34,382 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [696041107] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 02:47:34,382 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-14 02:47:34,382 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-14 02:47:34,382 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2001765879] [2024-11-14 02:47:34,383 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 02:47:34,383 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-14 02:47:34,383 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 02:47:34,384 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-14 02:47:34,385 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-14 02:47:34,385 INFO L87 Difference]: Start difference. First operand 16019 states and 17972 transitions. Second operand has 3 states, 3 states have (on average 114.33333333333333) internal successors, (343), 3 states have internal predecessors, (343), 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 02:47:35,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 02:47:35,132 INFO L93 Difference]: Finished difference Result 37330 states and 42106 transitions. [2024-11-14 02:47:35,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-14 02:47:35,132 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 114.33333333333333) internal successors, (343), 3 states have internal predecessors, (343), 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 348 [2024-11-14 02:47:35,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 02:47:35,145 INFO L225 Difference]: With dead ends: 37330 [2024-11-14 02:47:35,145 INFO L226 Difference]: Without dead ends: 22170 [2024-11-14 02:47:35,151 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 02:47:35,152 INFO L432 NwaCegarLoop]: 167 mSDtfsCounter, 103 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 426 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 103 SdHoareTripleChecker+Valid, 171 SdHoareTripleChecker+Invalid, 462 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 426 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-11-14 02:47:35,152 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [103 Valid, 171 Invalid, 462 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 426 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-11-14 02:47:35,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22170 states. [2024-11-14 02:47:35,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22170 to 20595. [2024-11-14 02:47:35,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20595 states, 20594 states have (on average 1.1362047198213072) internal successors, (23399), 20594 states have internal predecessors, (23399), 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 02:47:35,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20595 states to 20595 states and 23399 transitions. [2024-11-14 02:47:35,381 INFO L78 Accepts]: Start accepts. Automaton has 20595 states and 23399 transitions. Word has length 348 [2024-11-14 02:47:35,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 02:47:35,381 INFO L471 AbstractCegarLoop]: Abstraction has 20595 states and 23399 transitions. [2024-11-14 02:47:35,382 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 114.33333333333333) internal successors, (343), 3 states have internal predecessors, (343), 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 02:47:35,382 INFO L276 IsEmpty]: Start isEmpty. Operand 20595 states and 23399 transitions. [2024-11-14 02:47:35,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 361 [2024-11-14 02:47:35,397 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 02:47:35,397 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, 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, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 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 02:47:35,397 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-11-14 02:47:35,397 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 02:47:35,398 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 02:47:35,398 INFO L85 PathProgramCache]: Analyzing trace with hash 697420365, now seen corresponding path program 1 times [2024-11-14 02:47:35,398 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 02:47:35,398 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [607962520] [2024-11-14 02:47:35,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 02:47:35,398 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 02:47:35,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 02:47:35,680 INFO L134 CoverageAnalysis]: Checked inductivity of 317 backedges. 216 proven. 0 refuted. 0 times theorem prover too weak. 101 trivial. 0 not checked. [2024-11-14 02:47:35,681 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 02:47:35,681 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [607962520] [2024-11-14 02:47:35,681 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [607962520] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 02:47:35,681 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-14 02:47:35,681 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-14 02:47:35,681 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1458767985] [2024-11-14 02:47:35,681 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 02:47:35,682 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-14 02:47:35,682 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 02:47:35,682 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-14 02:47:35,682 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-14 02:47:35,683 INFO L87 Difference]: Start difference. First operand 20595 states and 23399 transitions. Second operand has 3 states, 3 states have (on average 89.0) internal successors, (267), 2 states have internal predecessors, (267), 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 02:47:36,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 02:47:36,078 INFO L93 Difference]: Finished difference Result 54204 states and 61767 transitions. [2024-11-14 02:47:36,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-14 02:47:36,078 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 89.0) internal successors, (267), 2 states have internal predecessors, (267), 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 360 [2024-11-14 02:47:36,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 02:47:36,103 INFO L225 Difference]: With dead ends: 54204 [2024-11-14 02:47:36,103 INFO L226 Difference]: Without dead ends: 34468 [2024-11-14 02:47:36,113 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 02:47:36,114 INFO L432 NwaCegarLoop]: 129 mSDtfsCounter, 91 mSDsluCounter, 122 mSDsCounter, 0 mSdLazyCounter, 177 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 91 SdHoareTripleChecker+Valid, 251 SdHoareTripleChecker+Invalid, 216 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 177 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-14 02:47:36,114 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [91 Valid, 251 Invalid, 216 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 177 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-14 02:47:36,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34468 states. [2024-11-14 02:47:36,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34468 to 34466. [2024-11-14 02:47:36,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34466 states, 34465 states have (on average 1.1394167996518207) internal successors, (39270), 34465 states have internal predecessors, (39270), 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 02:47:36,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34466 states to 34466 states and 39270 transitions. [2024-11-14 02:47:36,500 INFO L78 Accepts]: Start accepts. Automaton has 34466 states and 39270 transitions. Word has length 360 [2024-11-14 02:47:36,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 02:47:36,501 INFO L471 AbstractCegarLoop]: Abstraction has 34466 states and 39270 transitions. [2024-11-14 02:47:36,501 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 89.0) internal successors, (267), 2 states have internal predecessors, (267), 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 02:47:36,501 INFO L276 IsEmpty]: Start isEmpty. Operand 34466 states and 39270 transitions. [2024-11-14 02:47:36,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 367 [2024-11-14 02:47:36,527 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 02:47:36,527 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, 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, 1, 1, 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 02:47:36,527 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-11-14 02:47:36,527 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 02:47:36,528 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 02:47:36,528 INFO L85 PathProgramCache]: Analyzing trace with hash 537254207, now seen corresponding path program 1 times [2024-11-14 02:47:36,528 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 02:47:36,528 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [713365975] [2024-11-14 02:47:36,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 02:47:36,528 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 02:47:36,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 02:47:38,181 INFO L134 CoverageAnalysis]: Checked inductivity of 323 backedges. 222 proven. 101 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 02:47:38,181 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 02:47:38,181 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [713365975] [2024-11-14 02:47:38,181 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [713365975] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 02:47:38,181 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [489412149] [2024-11-14 02:47:38,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 02:47:38,182 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 02:47:38,182 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a212249-a434-4a09-81a1-7d2fb865d855/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 02:47:38,184 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a212249-a434-4a09-81a1-7d2fb865d855/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 02:47:38,186 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a212249-a434-4a09-81a1-7d2fb865d855/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-14 02:47:38,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 02:47:38,459 INFO L255 TraceCheckSpWp]: Trace formula consists of 579 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-11-14 02:47:38,467 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 02:47:39,047 INFO L134 CoverageAnalysis]: Checked inductivity of 323 backedges. 0 proven. 222 refuted. 0 times theorem prover too weak. 101 trivial. 0 not checked. [2024-11-14 02:47:39,047 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 02:47:39,639 INFO L134 CoverageAnalysis]: Checked inductivity of 323 backedges. 0 proven. 222 refuted. 0 times theorem prover too weak. 101 trivial. 0 not checked. [2024-11-14 02:47:39,639 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [489412149] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 02:47:39,639 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1620898136] [2024-11-14 02:47:39,678 INFO L159 IcfgInterpreter]: Started Sifa with 145 locations of interest [2024-11-14 02:47:39,679 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 02:47:39,683 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 02:47:39,688 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 02:47:39,689 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 02:48:12,725 WARN L286 SmtUtils]: Spent 8.74s 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 02:48:21,391 WARN L286 SmtUtils]: Spent 8.66s 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 02:49:09,065 WARN L176 XnfTransformerHelper]: Simplifying disjunction of 13408 conjunctions. This might take some time... [2024-11-14 02:49:20,502 INFO L192 XnfTransformerHelper]: Simplified to disjunction of 13408 conjunctions. [2024-11-14 02:49:20,581 WARN L176 XnfTransformerHelper]: Simplifying disjunction of 13408 conjunctions. This might take some time... [2024-11-14 02:49:31,162 INFO L192 XnfTransformerHelper]: Simplified to disjunction of 13408 conjunctions. [2024-11-14 02:52:44,977 WARN L286 SmtUtils]: Spent 3.22m 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 02:56:10,017 WARN L286 SmtUtils]: Spent 3.42m 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)