./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/eca-rers2012/Problem03_label02.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_dc1cf2b6-f131-41bf-87b9-2d216df3db6e/bin/utaipan-verify-sOmjnqqW8E/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc1cf2b6-f131-41bf-87b9-2d216df3db6e/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_dc1cf2b6-f131-41bf-87b9-2d216df3db6e/bin/utaipan-verify-sOmjnqqW8E/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc1cf2b6-f131-41bf-87b9-2d216df3db6e/bin/utaipan-verify-sOmjnqqW8E/config/TaipanReach.xml -i ../../sv-benchmarks/c/eca-rers2012/Problem03_label02.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc1cf2b6-f131-41bf-87b9-2d216df3db6e/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_dc1cf2b6-f131-41bf-87b9-2d216df3db6e/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 940f009ebef4e6f688860c69fe317a06471b0d96e24220f1e9007ff15bc7124f --- Real Ultimate output --- This is Ultimate 0.3.0-dev-826ab2b [2024-11-14 04:03:09,747 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-14 04:03:09,806 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc1cf2b6-f131-41bf-87b9-2d216df3db6e/bin/utaipan-verify-sOmjnqqW8E/config/svcomp-Reach-32bit-Taipan_Default.epf [2024-11-14 04:03:09,812 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-14 04:03:09,812 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-14 04:03:09,846 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-14 04:03:09,846 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-14 04:03:09,846 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-14 04:03:09,847 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-14 04:03:09,847 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-14 04:03:09,847 INFO L153 SettingsManager]: * User list type=DISABLED [2024-11-14 04:03:09,847 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2024-11-14 04:03:09,848 INFO L153 SettingsManager]: * Explicit value domain=true [2024-11-14 04:03:09,848 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2024-11-14 04:03:09,848 INFO L153 SettingsManager]: * Octagon Domain=false [2024-11-14 04:03:09,848 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2024-11-14 04:03:09,848 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2024-11-14 04:03:09,848 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2024-11-14 04:03:09,849 INFO L153 SettingsManager]: * Interval Domain=false [2024-11-14 04:03:09,849 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2024-11-14 04:03:09,849 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2024-11-14 04:03:09,849 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2024-11-14 04:03:09,850 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-14 04:03:09,850 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-14 04:03:09,850 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-14 04:03:09,850 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-14 04:03:09,850 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-14 04:03:09,850 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-14 04:03:09,850 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-14 04:03:09,851 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-14 04:03:09,851 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-14 04:03:09,851 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-14 04:03:09,851 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-14 04:03:09,851 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-14 04:03:09,851 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-14 04:03:09,851 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-14 04:03:09,852 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-14 04:03:09,852 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-14 04:03:09,852 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2024-11-14 04:03:09,852 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-14 04:03:09,852 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-14 04:03:09,852 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-14 04:03:09,852 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2024-11-14 04:03:09,853 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-14 04:03:09,853 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-14 04:03:09,853 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2024-11-14 04:03:09,853 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-14 04:03:09,853 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_dc1cf2b6-f131-41bf-87b9-2d216df3db6e/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 -> 940f009ebef4e6f688860c69fe317a06471b0d96e24220f1e9007ff15bc7124f [2024-11-14 04:03:10,156 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-14 04:03:10,166 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-14 04:03:10,173 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-14 04:03:10,174 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-14 04:03:10,176 INFO L274 PluginConnector]: CDTParser initialized [2024-11-14 04:03:10,179 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc1cf2b6-f131-41bf-87b9-2d216df3db6e/bin/utaipan-verify-sOmjnqqW8E/../../sv-benchmarks/c/eca-rers2012/Problem03_label02.c Unable to find full path for "g++" [2024-11-14 04:03:12,052 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-14 04:03:12,542 INFO L384 CDTParser]: Found 1 translation units. [2024-11-14 04:03:12,543 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc1cf2b6-f131-41bf-87b9-2d216df3db6e/sv-benchmarks/c/eca-rers2012/Problem03_label02.c [2024-11-14 04:03:12,568 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc1cf2b6-f131-41bf-87b9-2d216df3db6e/bin/utaipan-verify-sOmjnqqW8E/data/e131c91d2/a87fc15d871e4627816fc905261b8082/FLAG74af24e64 [2024-11-14 04:03:12,634 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc1cf2b6-f131-41bf-87b9-2d216df3db6e/bin/utaipan-verify-sOmjnqqW8E/data/e131c91d2/a87fc15d871e4627816fc905261b8082 [2024-11-14 04:03:12,636 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-14 04:03:12,638 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-14 04:03:12,640 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-14 04:03:12,640 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-14 04:03:12,646 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-14 04:03:12,647 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.11 04:03:12" (1/1) ... [2024-11-14 04:03:12,650 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@13f74ebf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 04:03:12, skipping insertion in model container [2024-11-14 04:03:12,650 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.11 04:03:12" (1/1) ... [2024-11-14 04:03:12,736 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-14 04:03:13,259 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_dc1cf2b6-f131-41bf-87b9-2d216df3db6e/sv-benchmarks/c/eca-rers2012/Problem03_label02.c[61770,61783] [2024-11-14 04:03:13,290 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-14 04:03:13,302 INFO L200 MainTranslator]: Completed pre-run [2024-11-14 04:03:13,537 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_dc1cf2b6-f131-41bf-87b9-2d216df3db6e/sv-benchmarks/c/eca-rers2012/Problem03_label02.c[61770,61783] [2024-11-14 04:03:13,550 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-14 04:03:13,577 INFO L204 MainTranslator]: Completed translation [2024-11-14 04:03:13,578 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 04:03:13 WrapperNode [2024-11-14 04:03:13,578 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-14 04:03:13,579 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-14 04:03:13,581 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-14 04:03:13,581 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-14 04:03:13,591 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 04:03:13" (1/1) ... [2024-11-14 04:03:13,638 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 04:03:13" (1/1) ... [2024-11-14 04:03:13,807 INFO L138 Inliner]: procedures = 14, calls = 8, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 1771 [2024-11-14 04:03:13,808 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-14 04:03:13,809 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-14 04:03:13,809 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-14 04:03:13,809 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-14 04:03:13,818 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 04:03:13" (1/1) ... [2024-11-14 04:03:13,818 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 04:03:13" (1/1) ... [2024-11-14 04:03:13,827 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 04:03:13" (1/1) ... [2024-11-14 04:03:13,827 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 04:03:13" (1/1) ... [2024-11-14 04:03:13,894 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 04:03:13" (1/1) ... [2024-11-14 04:03:13,911 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 04:03:13" (1/1) ... [2024-11-14 04:03:13,938 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 04:03:13" (1/1) ... [2024-11-14 04:03:13,947 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 04:03:13" (1/1) ... [2024-11-14 04:03:13,962 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-14 04:03:13,964 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-14 04:03:13,964 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-14 04:03:13,965 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-14 04:03:13,966 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 04:03:13" (1/1) ... [2024-11-14 04:03:13,980 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2024-11-14 04:03:13,994 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc1cf2b6-f131-41bf-87b9-2d216df3db6e/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 04:03:14,011 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc1cf2b6-f131-41bf-87b9-2d216df3db6e/bin/utaipan-verify-sOmjnqqW8E/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2024-11-14 04:03:14,015 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc1cf2b6-f131-41bf-87b9-2d216df3db6e/bin/utaipan-verify-sOmjnqqW8E/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2024-11-14 04:03:14,043 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-14 04:03:14,043 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2024-11-14 04:03:14,043 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-14 04:03:14,043 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-14 04:03:14,146 INFO L238 CfgBuilder]: Building ICFG [2024-11-14 04:03:14,148 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-14 04:03:16,602 INFO L? ?]: Removed 147 outVars from TransFormulas that were not future-live. [2024-11-14 04:03:16,603 INFO L287 CfgBuilder]: Performing block encoding [2024-11-14 04:03:17,123 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-14 04:03:17,123 INFO L316 CfgBuilder]: Removed 1 assume(true) statements. [2024-11-14 04:03:17,124 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.11 04:03:17 BoogieIcfgContainer [2024-11-14 04:03:17,124 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-14 04:03:17,128 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-14 04:03:17,128 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-14 04:03:17,133 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-14 04:03:17,133 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.11 04:03:12" (1/3) ... [2024-11-14 04:03:17,134 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@9a8592c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.11 04:03:17, skipping insertion in model container [2024-11-14 04:03:17,134 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 04:03:13" (2/3) ... [2024-11-14 04:03:17,134 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@9a8592c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.11 04:03:17, skipping insertion in model container [2024-11-14 04:03:17,135 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.11 04:03:17" (3/3) ... [2024-11-14 04:03:17,137 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem03_label02.c [2024-11-14 04:03:17,154 INFO L217 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-14 04:03:17,158 INFO L154 ceAbstractionStarter]: Applying trace abstraction to ICFG Problem03_label02.c that has 1 procedures, 148 locations, 1 initial locations, 1 loop locations, and 1 error locations. [2024-11-14 04:03:17,236 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-14 04:03:17,253 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;@768b0d3a, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-14 04:03:17,253 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-11-14 04:03:17,260 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 04:03:17,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2024-11-14 04:03:17,278 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:03:17,278 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 04:03:17,279 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 04:03:17,285 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:03:17,285 INFO L85 PathProgramCache]: Analyzing trace with hash 425823959, now seen corresponding path program 1 times [2024-11-14 04:03:17,294 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:03:17,294 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1986137693] [2024-11-14 04:03:17,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:03:17,296 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:03:17,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:03:18,500 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 04:03:18,500 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:03:18,500 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1986137693] [2024-11-14 04:03:18,501 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1986137693] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 04:03:18,501 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-14 04:03:18,501 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-14 04:03:18,503 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1422871731] [2024-11-14 04:03:18,503 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 04:03:18,507 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-14 04:03:18,508 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 04:03:18,563 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-14 04:03:18,564 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-14 04:03:18,567 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 04:03:19,679 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:03:19,681 INFO L93 Difference]: Finished difference Result 440 states and 860 transitions. [2024-11-14 04:03:19,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-14 04:03:19,685 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 04:03:19,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:03:19,700 INFO L225 Difference]: With dead ends: 440 [2024-11-14 04:03:19,700 INFO L226 Difference]: Without dead ends: 289 [2024-11-14 04:03:19,704 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 04:03:19,711 INFO L432 NwaCegarLoop]: 43 mSDtfsCounter, 38 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 506 mSolverCounterSat, 70 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 576 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 70 IncrementalHoareTripleChecker+Valid, 506 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2024-11-14 04:03:19,711 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [38 Valid, 49 Invalid, 576 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [70 Valid, 506 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2024-11-14 04:03:19,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 289 states. [2024-11-14 04:03:19,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 289 to 289. [2024-11-14 04:03:19,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 289 states, 288 states have (on average 1.8055555555555556) internal successors, (520), 288 states have internal predecessors, (520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:03:19,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 289 states to 289 states and 520 transitions. [2024-11-14 04:03:19,790 INFO L78 Accepts]: Start accepts. Automaton has 289 states and 520 transitions. Word has length 143 [2024-11-14 04:03:19,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:03:19,794 INFO L471 AbstractCegarLoop]: Abstraction has 289 states and 520 transitions. [2024-11-14 04:03:19,794 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 04:03:19,794 INFO L276 IsEmpty]: Start isEmpty. Operand 289 states and 520 transitions. [2024-11-14 04:03:19,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2024-11-14 04:03:19,796 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:03:19,797 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 04:03:19,797 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-14 04:03:19,797 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 04:03:19,798 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:03:19,798 INFO L85 PathProgramCache]: Analyzing trace with hash -169661940, now seen corresponding path program 1 times [2024-11-14 04:03:19,798 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:03:19,803 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [300380977] [2024-11-14 04:03:19,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:03:19,803 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:03:19,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:03:20,409 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 04:03:20,409 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:03:20,409 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [300380977] [2024-11-14 04:03:20,409 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [300380977] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 04:03:20,410 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-14 04:03:20,410 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-14 04:03:20,410 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [958317057] [2024-11-14 04:03:20,410 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 04:03:20,415 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-14 04:03:20,415 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 04:03:20,416 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-14 04:03:20,416 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-14 04:03:20,416 INFO L87 Difference]: Start difference. First operand 289 states and 520 transitions. Second operand has 3 states, 3 states have (on average 49.333333333333336) internal successors, (148), 2 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:03:21,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:03:21,416 INFO L93 Difference]: Finished difference Result 863 states and 1557 transitions. [2024-11-14 04:03:21,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-14 04:03:21,417 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 49.333333333333336) internal successors, (148), 2 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 148 [2024-11-14 04:03:21,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:03:21,420 INFO L225 Difference]: With dead ends: 863 [2024-11-14 04:03:21,420 INFO L226 Difference]: Without dead ends: 575 [2024-11-14 04:03:21,421 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 04:03:21,422 INFO L432 NwaCegarLoop]: 65 mSDtfsCounter, 164 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 502 mSolverCounterSat, 92 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 164 SdHoareTripleChecker+Valid, 70 SdHoareTripleChecker+Invalid, 594 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 92 IncrementalHoareTripleChecker+Valid, 502 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2024-11-14 04:03:21,422 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [164 Valid, 70 Invalid, 594 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [92 Valid, 502 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2024-11-14 04:03:21,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 575 states. [2024-11-14 04:03:21,461 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 575 to 575. [2024-11-14 04:03:21,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 575 states, 574 states have (on average 1.6724738675958188) internal successors, (960), 574 states have internal predecessors, (960), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:03:21,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 575 states to 575 states and 960 transitions. [2024-11-14 04:03:21,467 INFO L78 Accepts]: Start accepts. Automaton has 575 states and 960 transitions. Word has length 148 [2024-11-14 04:03:21,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:03:21,469 INFO L471 AbstractCegarLoop]: Abstraction has 575 states and 960 transitions. [2024-11-14 04:03:21,470 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 49.333333333333336) internal successors, (148), 2 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:03:21,470 INFO L276 IsEmpty]: Start isEmpty. Operand 575 states and 960 transitions. [2024-11-14 04:03:21,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2024-11-14 04:03:21,473 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:03:21,474 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 04:03:21,474 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-14 04:03:21,474 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 04:03:21,474 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:03:21,474 INFO L85 PathProgramCache]: Analyzing trace with hash 1311844598, now seen corresponding path program 1 times [2024-11-14 04:03:21,475 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:03:21,475 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2090247104] [2024-11-14 04:03:21,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:03:21,475 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:03:21,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:03:21,717 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 04:03:21,717 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:03:21,717 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2090247104] [2024-11-14 04:03:21,717 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2090247104] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 04:03:21,717 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-14 04:03:21,717 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-14 04:03:21,717 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1067417995] [2024-11-14 04:03:21,720 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 04:03:21,720 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-14 04:03:21,721 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 04:03:21,721 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-14 04:03:21,721 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-14 04:03:21,721 INFO L87 Difference]: Start difference. First operand 575 states and 960 transitions. Second operand has 3 states, 3 states have (on average 50.333333333333336) internal successors, (151), 2 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:03:22,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:03:22,676 INFO L93 Difference]: Finished difference Result 1721 states and 2877 transitions. [2024-11-14 04:03:22,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-14 04:03:22,677 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 50.333333333333336) internal successors, (151), 2 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 151 [2024-11-14 04:03:22,677 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:03:22,682 INFO L225 Difference]: With dead ends: 1721 [2024-11-14 04:03:22,682 INFO L226 Difference]: Without dead ends: 1147 [2024-11-14 04:03:22,684 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 04:03:22,684 INFO L432 NwaCegarLoop]: 22 mSDtfsCounter, 157 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 450 mSolverCounterSat, 170 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 157 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 620 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 170 IncrementalHoareTripleChecker+Valid, 450 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2024-11-14 04:03:22,685 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [157 Valid, 27 Invalid, 620 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [170 Valid, 450 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2024-11-14 04:03:22,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1147 states. [2024-11-14 04:03:22,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1147 to 1147. [2024-11-14 04:03:22,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1147 states, 1146 states have (on average 1.62565445026178) internal successors, (1863), 1146 states have internal predecessors, (1863), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:03:22,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1147 states to 1147 states and 1863 transitions. [2024-11-14 04:03:22,724 INFO L78 Accepts]: Start accepts. Automaton has 1147 states and 1863 transitions. Word has length 151 [2024-11-14 04:03:22,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:03:22,724 INFO L471 AbstractCegarLoop]: Abstraction has 1147 states and 1863 transitions. [2024-11-14 04:03:22,725 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 50.333333333333336) internal successors, (151), 2 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:03:22,725 INFO L276 IsEmpty]: Start isEmpty. Operand 1147 states and 1863 transitions. [2024-11-14 04:03:22,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2024-11-14 04:03:22,728 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:03:22,729 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 4, 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, 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 04:03:22,729 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-11-14 04:03:22,729 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 04:03:22,729 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:03:22,734 INFO L85 PathProgramCache]: Analyzing trace with hash -407585059, now seen corresponding path program 1 times [2024-11-14 04:03:22,734 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:03:22,734 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [413281297] [2024-11-14 04:03:22,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:03:22,735 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:03:22,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:03:23,137 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 28 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-14 04:03:23,137 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:03:23,137 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [413281297] [2024-11-14 04:03:23,137 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [413281297] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 04:03:23,137 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-14 04:03:23,138 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-14 04:03:23,138 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1286963079] [2024-11-14 04:03:23,138 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 04:03:23,138 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-14 04:03:23,138 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 04:03:23,139 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-14 04:03:23,139 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-14 04:03:23,139 INFO L87 Difference]: Start difference. First operand 1147 states and 1863 transitions. Second operand has 3 states, 3 states have (on average 52.666666666666664) internal successors, (158), 3 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:03:24,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:03:24,117 INFO L93 Difference]: Finished difference Result 3437 states and 5586 transitions. [2024-11-14 04:03:24,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-14 04:03:24,117 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 52.666666666666664) internal successors, (158), 3 states have internal predecessors, (158), 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 163 [2024-11-14 04:03:24,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:03:24,126 INFO L225 Difference]: With dead ends: 3437 [2024-11-14 04:03:24,126 INFO L226 Difference]: Without dead ends: 2291 [2024-11-14 04:03:24,131 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-14 04:03:24,132 INFO L432 NwaCegarLoop]: 258 mSDtfsCounter, 152 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 410 mSolverCounterSat, 162 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 152 SdHoareTripleChecker+Valid, 262 SdHoareTripleChecker+Invalid, 572 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 162 IncrementalHoareTripleChecker+Valid, 410 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2024-11-14 04:03:24,132 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [152 Valid, 262 Invalid, 572 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [162 Valid, 410 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2024-11-14 04:03:24,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2291 states. [2024-11-14 04:03:24,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2291 to 2291. [2024-11-14 04:03:24,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2291 states, 2290 states have (on average 1.4017467248908297) internal successors, (3210), 2290 states have internal predecessors, (3210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:03:24,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2291 states to 2291 states and 3210 transitions. [2024-11-14 04:03:24,205 INFO L78 Accepts]: Start accepts. Automaton has 2291 states and 3210 transitions. Word has length 163 [2024-11-14 04:03:24,206 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:03:24,206 INFO L471 AbstractCegarLoop]: Abstraction has 2291 states and 3210 transitions. [2024-11-14 04:03:24,206 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 52.666666666666664) internal successors, (158), 3 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:03:24,206 INFO L276 IsEmpty]: Start isEmpty. Operand 2291 states and 3210 transitions. [2024-11-14 04:03:24,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 177 [2024-11-14 04:03:24,232 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:03:24,233 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 04:03:24,233 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-11-14 04:03:24,233 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 04:03:24,234 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:03:24,234 INFO L85 PathProgramCache]: Analyzing trace with hash -292778838, now seen corresponding path program 1 times [2024-11-14 04:03:24,234 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:03:24,234 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1153393415] [2024-11-14 04:03:24,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:03:24,234 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:03:24,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:03:24,734 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 46 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-14 04:03:24,734 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:03:24,734 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1153393415] [2024-11-14 04:03:24,736 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1153393415] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 04:03:24,736 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-14 04:03:24,736 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-14 04:03:24,736 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1276941835] [2024-11-14 04:03:24,736 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 04:03:24,737 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-14 04:03:24,737 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 04:03:24,737 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-14 04:03:24,737 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-14 04:03:24,738 INFO L87 Difference]: Start difference. First operand 2291 states and 3210 transitions. Second operand has 3 states, 3 states have (on average 57.0) internal successors, (171), 3 states have internal predecessors, (171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:03:25,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:03:25,707 INFO L93 Difference]: Finished difference Result 5725 states and 7992 transitions. [2024-11-14 04:03:25,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-14 04:03:25,707 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 57.0) internal successors, (171), 3 states have internal predecessors, (171), 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 04:03:25,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:03:25,718 INFO L225 Difference]: With dead ends: 5725 [2024-11-14 04:03:25,719 INFO L226 Difference]: Without dead ends: 3435 [2024-11-14 04:03:25,721 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-14 04:03:25,722 INFO L432 NwaCegarLoop]: 264 mSDtfsCounter, 129 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 477 mSolverCounterSat, 108 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 129 SdHoareTripleChecker+Valid, 269 SdHoareTripleChecker+Invalid, 585 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 108 IncrementalHoareTripleChecker+Valid, 477 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2024-11-14 04:03:25,722 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [129 Valid, 269 Invalid, 585 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [108 Valid, 477 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2024-11-14 04:03:25,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3435 states. [2024-11-14 04:03:25,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3435 to 3435. [2024-11-14 04:03:25,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3435 states, 3434 states have (on average 1.3453698311007571) internal successors, (4620), 3434 states have internal predecessors, (4620), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:03:25,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3435 states to 3435 states and 4620 transitions. [2024-11-14 04:03:25,804 INFO L78 Accepts]: Start accepts. Automaton has 3435 states and 4620 transitions. Word has length 176 [2024-11-14 04:03:25,805 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:03:25,805 INFO L471 AbstractCegarLoop]: Abstraction has 3435 states and 4620 transitions. [2024-11-14 04:03:25,805 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 57.0) internal successors, (171), 3 states have internal predecessors, (171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:03:25,805 INFO L276 IsEmpty]: Start isEmpty. Operand 3435 states and 4620 transitions. [2024-11-14 04:03:25,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 182 [2024-11-14 04:03:25,812 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:03:25,812 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 04:03:25,812 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-11-14 04:03:25,812 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 04:03:25,813 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:03:25,813 INFO L85 PathProgramCache]: Analyzing trace with hash 1937079675, now seen corresponding path program 1 times [2024-11-14 04:03:25,813 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:03:25,813 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1315320689] [2024-11-14 04:03:25,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:03:25,813 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:03:25,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:03:26,409 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 37 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 04:03:26,410 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:03:26,410 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1315320689] [2024-11-14 04:03:26,410 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1315320689] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 04:03:26,410 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [700031253] [2024-11-14 04:03:26,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:03:26,410 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:03:26,410 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc1cf2b6-f131-41bf-87b9-2d216df3db6e/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 04:03:26,413 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc1cf2b6-f131-41bf-87b9-2d216df3db6e/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 04:03:26,415 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc1cf2b6-f131-41bf-87b9-2d216df3db6e/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-14 04:03:26,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:03:26,621 INFO L255 TraceCheckSpWp]: Trace formula consists of 438 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-11-14 04:03:26,630 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 04:03:26,891 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 37 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-14 04:03:26,891 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-14 04:03:26,891 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [700031253] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 04:03:26,891 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-14 04:03:26,891 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2024-11-14 04:03:26,892 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [807285205] [2024-11-14 04:03:26,892 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 04:03:26,892 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-14 04:03:26,892 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 04:03:26,895 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-14 04:03:26,895 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-14 04:03:26,899 INFO L87 Difference]: Start difference. First operand 3435 states and 4620 transitions. Second operand has 3 states, 3 states have (on average 58.666666666666664) internal successors, (176), 3 states have internal predecessors, (176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:03:27,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:03:27,841 INFO L93 Difference]: Finished difference Result 10301 states and 13857 transitions. [2024-11-14 04:03:27,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-14 04:03:27,842 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 58.666666666666664) internal successors, (176), 3 states have internal predecessors, (176), 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 181 [2024-11-14 04:03:27,843 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:03:27,865 INFO L225 Difference]: With dead ends: 10301 [2024-11-14 04:03:27,865 INFO L226 Difference]: Without dead ends: 6867 [2024-11-14 04:03:27,869 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 183 GetRequests, 180 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 04:03:27,871 INFO L432 NwaCegarLoop]: 281 mSDtfsCounter, 5 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 437 mSolverCounterSat, 124 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 298 SdHoareTripleChecker+Invalid, 561 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 124 IncrementalHoareTripleChecker+Valid, 437 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2024-11-14 04:03:27,872 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 298 Invalid, 561 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [124 Valid, 437 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2024-11-14 04:03:27,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6867 states. [2024-11-14 04:03:28,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6867 to 6867. [2024-11-14 04:03:28,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6867 states, 6866 states have (on average 1.324206233614914) internal successors, (9092), 6866 states have internal predecessors, (9092), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:03:28,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6867 states to 6867 states and 9092 transitions. [2024-11-14 04:03:28,048 INFO L78 Accepts]: Start accepts. Automaton has 6867 states and 9092 transitions. Word has length 181 [2024-11-14 04:03:28,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:03:28,049 INFO L471 AbstractCegarLoop]: Abstraction has 6867 states and 9092 transitions. [2024-11-14 04:03:28,050 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 58.666666666666664) internal successors, (176), 3 states have internal predecessors, (176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:03:28,050 INFO L276 IsEmpty]: Start isEmpty. Operand 6867 states and 9092 transitions. [2024-11-14 04:03:28,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 185 [2024-11-14 04:03:28,060 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:03:28,061 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 04:03:28,081 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc1cf2b6-f131-41bf-87b9-2d216df3db6e/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-11-14 04:03:28,261 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc1cf2b6-f131-41bf-87b9-2d216df3db6e/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2024-11-14 04:03:28,262 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 04:03:28,262 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:03:28,262 INFO L85 PathProgramCache]: Analyzing trace with hash 494051467, now seen corresponding path program 1 times [2024-11-14 04:03:28,262 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:03:28,263 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [405860774] [2024-11-14 04:03:28,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:03:28,263 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:03:28,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:03:28,857 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 40 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 04:03:28,857 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:03:28,857 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [405860774] [2024-11-14 04:03:28,857 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [405860774] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 04:03:28,857 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-14 04:03:28,858 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-14 04:03:28,858 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1519948262] [2024-11-14 04:03:28,858 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 04:03:28,858 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-14 04:03:28,858 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 04:03:28,859 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-14 04:03:28,859 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-14 04:03:28,859 INFO L87 Difference]: Start difference. First operand 6867 states and 9092 transitions. Second operand has 3 states, 3 states have (on average 61.333333333333336) internal successors, (184), 2 states have internal predecessors, (184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:03:29,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:03:29,869 INFO L93 Difference]: Finished difference Result 16021 states and 21314 transitions. [2024-11-14 04:03:29,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-14 04:03:29,870 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 61.333333333333336) internal successors, (184), 2 states have internal predecessors, (184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 184 [2024-11-14 04:03:29,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:03:29,898 INFO L225 Difference]: With dead ends: 16021 [2024-11-14 04:03:29,899 INFO L226 Difference]: Without dead ends: 9155 [2024-11-14 04:03:29,906 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 04:03:29,907 INFO L432 NwaCegarLoop]: 81 mSDtfsCounter, 116 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 579 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 116 SdHoareTripleChecker+Valid, 86 SdHoareTripleChecker+Invalid, 614 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 579 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2024-11-14 04:03:29,907 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [116 Valid, 86 Invalid, 614 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 579 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2024-11-14 04:03:29,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9155 states. [2024-11-14 04:03:30,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9155 to 9155. [2024-11-14 04:03:30,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9155 states, 9154 states have (on average 1.3209525890321172) internal successors, (12092), 9154 states have internal predecessors, (12092), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:03:30,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9155 states to 9155 states and 12092 transitions. [2024-11-14 04:03:30,135 INFO L78 Accepts]: Start accepts. Automaton has 9155 states and 12092 transitions. Word has length 184 [2024-11-14 04:03:30,135 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:03:30,135 INFO L471 AbstractCegarLoop]: Abstraction has 9155 states and 12092 transitions. [2024-11-14 04:03:30,135 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 61.333333333333336) internal successors, (184), 2 states have internal predecessors, (184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:03:30,135 INFO L276 IsEmpty]: Start isEmpty. Operand 9155 states and 12092 transitions. [2024-11-14 04:03:30,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 192 [2024-11-14 04:03:30,150 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:03:30,150 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 04:03:30,151 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-11-14 04:03:30,151 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 04:03:30,151 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:03:30,152 INFO L85 PathProgramCache]: Analyzing trace with hash -1573692389, now seen corresponding path program 1 times [2024-11-14 04:03:30,152 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:03:30,152 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1575005346] [2024-11-14 04:03:30,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:03:30,152 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:03:30,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:03:30,770 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 47 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 04:03:30,770 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:03:30,770 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1575005346] [2024-11-14 04:03:30,770 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1575005346] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 04:03:30,770 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [800114403] [2024-11-14 04:03:30,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:03:30,770 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:03:30,770 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc1cf2b6-f131-41bf-87b9-2d216df3db6e/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 04:03:30,774 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc1cf2b6-f131-41bf-87b9-2d216df3db6e/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 04:03:30,776 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc1cf2b6-f131-41bf-87b9-2d216df3db6e/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-14 04:03:30,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:03:30,977 INFO L255 TraceCheckSpWp]: Trace formula consists of 446 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-11-14 04:03:30,984 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 04:03:31,238 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 47 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-14 04:03:31,238 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-14 04:03:31,239 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [800114403] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 04:03:31,239 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-14 04:03:31,239 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2024-11-14 04:03:31,240 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1009635049] [2024-11-14 04:03:31,240 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 04:03:31,240 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-14 04:03:31,240 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 04:03:31,241 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-14 04:03:31,241 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2024-11-14 04:03:31,241 INFO L87 Difference]: Start difference. First operand 9155 states and 12092 transitions. Second operand has 3 states, 3 states have (on average 62.0) internal successors, (186), 3 states have internal predecessors, (186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:03:32,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:03:32,223 INFO L93 Difference]: Finished difference Result 20740 states and 27888 transitions. [2024-11-14 04:03:32,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-14 04:03:32,223 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 62.0) internal successors, (186), 3 states have internal predecessors, (186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 191 [2024-11-14 04:03:32,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:03:32,276 INFO L225 Difference]: With dead ends: 20740 [2024-11-14 04:03:32,277 INFO L226 Difference]: Without dead ends: 11872 [2024-11-14 04:03:32,286 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 193 GetRequests, 190 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2024-11-14 04:03:32,287 INFO L432 NwaCegarLoop]: 19 mSDtfsCounter, 47 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 490 mSolverCounterSat, 96 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 586 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 96 IncrementalHoareTripleChecker+Valid, 490 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2024-11-14 04:03:32,287 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [47 Valid, 24 Invalid, 586 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [96 Valid, 490 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2024-11-14 04:03:32,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11872 states. [2024-11-14 04:03:32,585 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11872 to 11872. [2024-11-14 04:03:32,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11872 states, 11871 states have (on average 1.3515289360626737) internal successors, (16044), 11871 states have internal predecessors, (16044), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:03:32,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11872 states to 11872 states and 16044 transitions. [2024-11-14 04:03:32,644 INFO L78 Accepts]: Start accepts. Automaton has 11872 states and 16044 transitions. Word has length 191 [2024-11-14 04:03:32,644 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:03:32,644 INFO L471 AbstractCegarLoop]: Abstraction has 11872 states and 16044 transitions. [2024-11-14 04:03:32,646 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 62.0) internal successors, (186), 3 states have internal predecessors, (186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:03:32,646 INFO L276 IsEmpty]: Start isEmpty. Operand 11872 states and 16044 transitions. [2024-11-14 04:03:32,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 253 [2024-11-14 04:03:32,672 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:03:32,672 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 04:03:32,691 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc1cf2b6-f131-41bf-87b9-2d216df3db6e/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-11-14 04:03:32,876 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc1cf2b6-f131-41bf-87b9-2d216df3db6e/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2024-11-14 04:03:32,877 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 04:03:32,877 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:03:32,877 INFO L85 PathProgramCache]: Analyzing trace with hash -2140908178, now seen corresponding path program 1 times [2024-11-14 04:03:32,877 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:03:32,877 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1679837082] [2024-11-14 04:03:32,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:03:32,877 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:03:32,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:03:33,593 INFO L134 CoverageAnalysis]: Checked inductivity of 161 backedges. 94 proven. 6 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2024-11-14 04:03:33,593 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:03:33,594 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1679837082] [2024-11-14 04:03:33,594 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1679837082] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 04:03:33,594 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2008179052] [2024-11-14 04:03:33,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:03:33,594 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:03:33,594 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc1cf2b6-f131-41bf-87b9-2d216df3db6e/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 04:03:33,596 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc1cf2b6-f131-41bf-87b9-2d216df3db6e/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 04:03:33,600 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc1cf2b6-f131-41bf-87b9-2d216df3db6e/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-14 04:03:33,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:03:33,839 INFO L255 TraceCheckSpWp]: Trace formula consists of 546 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-11-14 04:03:33,846 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 04:03:33,955 INFO L134 CoverageAnalysis]: Checked inductivity of 161 backedges. 155 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-14 04:03:33,955 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-14 04:03:33,955 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2008179052] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 04:03:33,956 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-14 04:03:33,956 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2024-11-14 04:03:33,956 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1316956101] [2024-11-14 04:03:33,956 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 04:03:33,956 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-14 04:03:33,957 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 04:03:33,957 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-14 04:03:33,957 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2024-11-14 04:03:33,958 INFO L87 Difference]: Start difference. First operand 11872 states and 16044 transitions. Second operand has 3 states, 3 states have (on average 82.33333333333333) internal successors, (247), 3 states have internal predecessors, (247), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:03:34,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:03:34,942 INFO L93 Difference]: Finished difference Result 27604 states and 37808 transitions. [2024-11-14 04:03:34,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-14 04:03:34,943 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 82.33333333333333) internal successors, (247), 3 states have internal predecessors, (247), 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 252 [2024-11-14 04:03:34,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:03:34,978 INFO L225 Difference]: With dead ends: 27604 [2024-11-14 04:03:34,978 INFO L226 Difference]: Without dead ends: 15876 [2024-11-14 04:03:34,991 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 254 GetRequests, 251 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2024-11-14 04:03:34,994 INFO L432 NwaCegarLoop]: 83 mSDtfsCounter, 99 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 398 mSolverCounterSat, 189 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 99 SdHoareTripleChecker+Valid, 87 SdHoareTripleChecker+Invalid, 587 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 189 IncrementalHoareTripleChecker+Valid, 398 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2024-11-14 04:03:34,994 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [99 Valid, 87 Invalid, 587 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [189 Valid, 398 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2024-11-14 04:03:35,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15876 states. [2024-11-14 04:03:35,237 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15876 to 15876. [2024-11-14 04:03:35,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15876 states, 15875 states have (on average 1.2959370078740158) internal successors, (20573), 15875 states have internal predecessors, (20573), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:03:35,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15876 states to 15876 states and 20573 transitions. [2024-11-14 04:03:35,297 INFO L78 Accepts]: Start accepts. Automaton has 15876 states and 20573 transitions. Word has length 252 [2024-11-14 04:03:35,297 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:03:35,297 INFO L471 AbstractCegarLoop]: Abstraction has 15876 states and 20573 transitions. [2024-11-14 04:03:35,298 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 82.33333333333333) internal successors, (247), 3 states have internal predecessors, (247), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:03:35,298 INFO L276 IsEmpty]: Start isEmpty. Operand 15876 states and 20573 transitions. [2024-11-14 04:03:35,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 254 [2024-11-14 04:03:35,325 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:03:35,325 INFO L215 NwaCegarLoop]: trace histogram [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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 04:03:35,345 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc1cf2b6-f131-41bf-87b9-2d216df3db6e/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-11-14 04:03:35,525 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc1cf2b6-f131-41bf-87b9-2d216df3db6e/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:03:35,526 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 04:03:35,526 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:03:35,526 INFO L85 PathProgramCache]: Analyzing trace with hash -1574626790, now seen corresponding path program 1 times [2024-11-14 04:03:35,526 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:03:35,527 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1766518718] [2024-11-14 04:03:35,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:03:35,527 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:03:35,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:03:35,942 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 113 proven. 0 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2024-11-14 04:03:35,942 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:03:35,942 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1766518718] [2024-11-14 04:03:35,942 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1766518718] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 04:03:35,942 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-14 04:03:35,943 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-14 04:03:35,943 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [491683512] [2024-11-14 04:03:35,943 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 04:03:35,944 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-14 04:03:35,944 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 04:03:35,944 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-14 04:03:35,944 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-14 04:03:35,945 INFO L87 Difference]: Start difference. First operand 15876 states and 20573 transitions. Second operand has 4 states, 4 states have (on average 48.25) internal successors, (193), 3 states have internal predecessors, (193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:03:37,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:03:37,654 INFO L93 Difference]: Finished difference Result 33181 states and 43235 transitions. [2024-11-14 04:03:37,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-14 04:03:37,655 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 48.25) internal successors, (193), 3 states have internal predecessors, (193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 253 [2024-11-14 04:03:37,655 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:03:37,695 INFO L225 Difference]: With dead ends: 33181 [2024-11-14 04:03:37,695 INFO L226 Difference]: Without dead ends: 17449 [2024-11-14 04:03:37,707 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 04:03:37,708 INFO L432 NwaCegarLoop]: 104 mSDtfsCounter, 250 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 918 mSolverCounterSat, 230 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 250 SdHoareTripleChecker+Valid, 113 SdHoareTripleChecker+Invalid, 1148 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 230 IncrementalHoareTripleChecker+Valid, 918 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2024-11-14 04:03:37,708 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [250 Valid, 113 Invalid, 1148 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [230 Valid, 918 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2024-11-14 04:03:37,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17449 states. [2024-11-14 04:03:37,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17449 to 15876. [2024-11-14 04:03:37,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15876 states, 15875 states have (on average 1.2959370078740158) internal successors, (20573), 15875 states have internal predecessors, (20573), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:03:38,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15876 states to 15876 states and 20573 transitions. [2024-11-14 04:03:38,011 INFO L78 Accepts]: Start accepts. Automaton has 15876 states and 20573 transitions. Word has length 253 [2024-11-14 04:03:38,011 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:03:38,011 INFO L471 AbstractCegarLoop]: Abstraction has 15876 states and 20573 transitions. [2024-11-14 04:03:38,012 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 48.25) internal successors, (193), 3 states have internal predecessors, (193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:03:38,012 INFO L276 IsEmpty]: Start isEmpty. Operand 15876 states and 20573 transitions. [2024-11-14 04:03:38,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 261 [2024-11-14 04:03:38,041 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:03:38,041 INFO L215 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 04:03:38,041 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-11-14 04:03:38,041 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 04:03:38,042 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:03:38,042 INFO L85 PathProgramCache]: Analyzing trace with hash -97544054, now seen corresponding path program 1 times [2024-11-14 04:03:38,042 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:03:38,042 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1035769745] [2024-11-14 04:03:38,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:03:38,042 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:03:38,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:03:38,576 INFO L134 CoverageAnalysis]: Checked inductivity of 201 backedges. 98 proven. 6 refuted. 0 times theorem prover too weak. 97 trivial. 0 not checked. [2024-11-14 04:03:38,576 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:03:38,576 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1035769745] [2024-11-14 04:03:38,576 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1035769745] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 04:03:38,576 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [875454166] [2024-11-14 04:03:38,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:03:38,577 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:03:38,578 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc1cf2b6-f131-41bf-87b9-2d216df3db6e/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 04:03:38,580 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc1cf2b6-f131-41bf-87b9-2d216df3db6e/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 04:03:38,583 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc1cf2b6-f131-41bf-87b9-2d216df3db6e/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-14 04:03:38,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:03:38,815 INFO L255 TraceCheckSpWp]: Trace formula consists of 580 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-11-14 04:03:38,820 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 04:03:38,913 INFO L134 CoverageAnalysis]: Checked inductivity of 201 backedges. 110 proven. 0 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2024-11-14 04:03:38,913 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-14 04:03:38,913 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [875454166] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 04:03:38,913 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-14 04:03:38,913 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [3] total 4 [2024-11-14 04:03:38,913 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2065409842] [2024-11-14 04:03:38,913 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 04:03:38,914 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-14 04:03:38,914 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 04:03:38,914 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-14 04:03:38,916 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-14 04:03:38,916 INFO L87 Difference]: Start difference. First operand 15876 states and 20573 transitions. Second operand has 3 states, 3 states have (on average 59.333333333333336) internal successors, (178), 2 states have internal predecessors, (178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:03:39,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:03:39,433 INFO L93 Difference]: Finished difference Result 29320 states and 38057 transitions. [2024-11-14 04:03:39,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-14 04:03:39,434 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 59.333333333333336) internal successors, (178), 2 states have internal predecessors, (178), 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 260 [2024-11-14 04:03:39,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:03:39,462 INFO L225 Difference]: With dead ends: 29320 [2024-11-14 04:03:39,462 INFO L226 Difference]: Without dead ends: 13588 [2024-11-14 04:03:39,473 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 262 GetRequests, 259 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 04:03:39,474 INFO L432 NwaCegarLoop]: 5 mSDtfsCounter, 227 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 264 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 227 SdHoareTripleChecker+Valid, 5 SdHoareTripleChecker+Invalid, 287 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 264 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-14 04:03:39,475 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [227 Valid, 5 Invalid, 287 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 264 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-11-14 04:03:39,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13588 states. [2024-11-14 04:03:39,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13588 to 13588. [2024-11-14 04:03:39,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13588 states, 13587 states have (on average 1.2768087142121145) internal successors, (17348), 13587 states have internal predecessors, (17348), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:03:39,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13588 states to 13588 states and 17348 transitions. [2024-11-14 04:03:39,774 INFO L78 Accepts]: Start accepts. Automaton has 13588 states and 17348 transitions. Word has length 260 [2024-11-14 04:03:39,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:03:39,774 INFO L471 AbstractCegarLoop]: Abstraction has 13588 states and 17348 transitions. [2024-11-14 04:03:39,774 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 59.333333333333336) internal successors, (178), 2 states have internal predecessors, (178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:03:39,774 INFO L276 IsEmpty]: Start isEmpty. Operand 13588 states and 17348 transitions. [2024-11-14 04:03:39,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 268 [2024-11-14 04:03:39,792 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:03:39,792 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2024-11-14 04:03:39,812 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc1cf2b6-f131-41bf-87b9-2d216df3db6e/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-11-14 04:03:39,992 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc1cf2b6-f131-41bf-87b9-2d216df3db6e/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:03:39,993 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 04:03:39,993 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:03:39,993 INFO L85 PathProgramCache]: Analyzing trace with hash 1421452960, now seen corresponding path program 1 times [2024-11-14 04:03:39,994 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:03:39,994 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1458861526] [2024-11-14 04:03:39,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:03:39,994 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:03:40,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:03:40,595 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 123 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 04:03:40,595 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:03:40,595 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1458861526] [2024-11-14 04:03:40,596 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1458861526] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 04:03:40,596 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-14 04:03:40,596 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-14 04:03:40,596 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [576825151] [2024-11-14 04:03:40,596 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 04:03:40,596 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-14 04:03:40,597 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 04:03:40,597 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-14 04:03:40,597 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-14 04:03:40,597 INFO L87 Difference]: Start difference. First operand 13588 states and 17348 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 04:03:41,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:03:41,393 INFO L93 Difference]: Finished difference Result 31751 states and 40426 transitions. [2024-11-14 04:03:41,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-14 04:03:41,394 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 267 [2024-11-14 04:03:41,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:03:41,423 INFO L225 Difference]: With dead ends: 31751 [2024-11-14 04:03:41,423 INFO L226 Difference]: Without dead ends: 18307 [2024-11-14 04:03:41,433 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 04:03:41,434 INFO L432 NwaCegarLoop]: 36 mSDtfsCounter, 27 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 508 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 537 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 508 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2024-11-14 04:03:41,435 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 41 Invalid, 537 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 508 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2024-11-14 04:03:41,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18307 states. [2024-11-14 04:03:41,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18307 to 18307. [2024-11-14 04:03:41,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18307 states, 18306 states have (on average 1.2618267234786409) internal successors, (23099), 18306 states have internal predecessors, (23099), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:03:41,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18307 states to 18307 states and 23099 transitions. [2024-11-14 04:03:41,678 INFO L78 Accepts]: Start accepts. Automaton has 18307 states and 23099 transitions. Word has length 267 [2024-11-14 04:03:41,679 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:03:41,679 INFO L471 AbstractCegarLoop]: Abstraction has 18307 states and 23099 transitions. [2024-11-14 04:03:41,679 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 04:03:41,680 INFO L276 IsEmpty]: Start isEmpty. Operand 18307 states and 23099 transitions. [2024-11-14 04:03:41,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 275 [2024-11-14 04:03:41,697 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:03:41,698 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2024-11-14 04:03:41,699 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-11-14 04:03:41,701 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 04:03:41,701 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:03:41,701 INFO L85 PathProgramCache]: Analyzing trace with hash 562962704, now seen corresponding path program 1 times [2024-11-14 04:03:41,702 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:03:41,702 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [813815118] [2024-11-14 04:03:41,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:03:41,702 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:03:41,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:03:43,681 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 130 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 04:03:43,681 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:03:43,681 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [813815118] [2024-11-14 04:03:43,682 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [813815118] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 04:03:43,682 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [824239475] [2024-11-14 04:03:43,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:03:43,682 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:03:43,685 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc1cf2b6-f131-41bf-87b9-2d216df3db6e/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 04:03:43,687 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc1cf2b6-f131-41bf-87b9-2d216df3db6e/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 04:03:43,723 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc1cf2b6-f131-41bf-87b9-2d216df3db6e/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-14 04:03:43,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:03:43,939 INFO L255 TraceCheckSpWp]: Trace formula consists of 510 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-11-14 04:03:43,944 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 04:03:45,307 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 130 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-14 04:03:45,308 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-14 04:03:45,308 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [824239475] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 04:03:45,308 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-14 04:03:45,308 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 6 [2024-11-14 04:03:45,308 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [650141664] [2024-11-14 04:03:45,308 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 04:03:45,309 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-14 04:03:45,309 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 04:03:45,310 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-14 04:03:45,310 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-14 04:03:45,310 INFO L87 Difference]: Start difference. First operand 18307 states and 23099 transitions. Second operand has 3 states, 3 states have (on average 89.66666666666667) internal successors, (269), 3 states have internal predecessors, (269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:03:46,316 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:03:46,316 INFO L93 Difference]: Finished difference Result 39330 states and 49881 transitions. [2024-11-14 04:03:46,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-14 04:03:46,316 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 89.66666666666667) internal successors, (269), 3 states have internal predecessors, (269), 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 274 [2024-11-14 04:03:46,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:03:46,354 INFO L225 Difference]: With dead ends: 39330 [2024-11-14 04:03:46,355 INFO L226 Difference]: Without dead ends: 21882 [2024-11-14 04:03:46,367 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 277 GetRequests, 273 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-14 04:03:46,368 INFO L432 NwaCegarLoop]: 91 mSDtfsCounter, 8 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 507 mSolverCounterSat, 71 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 96 SdHoareTripleChecker+Invalid, 578 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 71 IncrementalHoareTripleChecker+Valid, 507 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2024-11-14 04:03:46,368 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 96 Invalid, 578 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [71 Valid, 507 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2024-11-14 04:03:46,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21882 states. [2024-11-14 04:03:46,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21882 to 21882. [2024-11-14 04:03:46,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21882 states, 21881 states have (on average 1.2415337507426534) internal successors, (27166), 21881 states have internal predecessors, (27166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:03:46,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21882 states to 21882 states and 27166 transitions. [2024-11-14 04:03:46,739 INFO L78 Accepts]: Start accepts. Automaton has 21882 states and 27166 transitions. Word has length 274 [2024-11-14 04:03:46,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:03:46,739 INFO L471 AbstractCegarLoop]: Abstraction has 21882 states and 27166 transitions. [2024-11-14 04:03:46,740 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 89.66666666666667) internal successors, (269), 3 states have internal predecessors, (269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:03:46,740 INFO L276 IsEmpty]: Start isEmpty. Operand 21882 states and 27166 transitions. [2024-11-14 04:03:46,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 280 [2024-11-14 04:03:46,761 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:03:46,761 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, 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] [2024-11-14 04:03:46,782 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc1cf2b6-f131-41bf-87b9-2d216df3db6e/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2024-11-14 04:03:46,963 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc1cf2b6-f131-41bf-87b9-2d216df3db6e/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:03:46,963 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 04:03:46,964 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:03:46,964 INFO L85 PathProgramCache]: Analyzing trace with hash -1813490200, now seen corresponding path program 1 times [2024-11-14 04:03:46,964 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:03:46,964 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [893369151] [2024-11-14 04:03:46,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:03:46,964 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:03:47,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:03:47,354 INFO L134 CoverageAnalysis]: Checked inductivity of 195 backedges. 134 proven. 0 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2024-11-14 04:03:47,354 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:03:47,354 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [893369151] [2024-11-14 04:03:47,355 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [893369151] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 04:03:47,355 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-14 04:03:47,355 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-14 04:03:47,355 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1589389106] [2024-11-14 04:03:47,355 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 04:03:47,356 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-14 04:03:47,356 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 04:03:47,356 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-14 04:03:47,357 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-14 04:03:47,357 INFO L87 Difference]: Start difference. First operand 21882 states and 27166 transitions. Second operand has 3 states, 3 states have (on average 73.0) internal successors, (219), 2 states have internal predecessors, (219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:03:48,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:03:48,208 INFO L93 Difference]: Finished difference Result 47195 states and 58632 transitions. [2024-11-14 04:03:48,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-14 04:03:48,209 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 73.0) internal successors, (219), 2 states have internal predecessors, (219), 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 279 [2024-11-14 04:03:48,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:03:48,239 INFO L225 Difference]: With dead ends: 47195 [2024-11-14 04:03:48,239 INFO L226 Difference]: Without dead ends: 25743 [2024-11-14 04:03:48,255 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 04:03:48,256 INFO L432 NwaCegarLoop]: 67 mSDtfsCounter, 84 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 519 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 80 SdHoareTripleChecker+Invalid, 529 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 519 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2024-11-14 04:03:48,256 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [84 Valid, 80 Invalid, 529 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 519 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2024-11-14 04:03:48,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25743 states. [2024-11-14 04:03:48,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25743 to 25028. [2024-11-14 04:03:48,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25028 states, 25027 states have (on average 1.243856634834379) internal successors, (31130), 25027 states have internal predecessors, (31130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:03:48,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25028 states to 25028 states and 31130 transitions. [2024-11-14 04:03:48,718 INFO L78 Accepts]: Start accepts. Automaton has 25028 states and 31130 transitions. Word has length 279 [2024-11-14 04:03:48,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:03:48,719 INFO L471 AbstractCegarLoop]: Abstraction has 25028 states and 31130 transitions. [2024-11-14 04:03:48,719 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 73.0) internal successors, (219), 2 states have internal predecessors, (219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:03:48,719 INFO L276 IsEmpty]: Start isEmpty. Operand 25028 states and 31130 transitions. [2024-11-14 04:03:48,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 301 [2024-11-14 04:03:48,738 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:03:48,739 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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 04:03:48,739 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-11-14 04:03:48,739 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 04:03:48,739 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:03:48,740 INFO L85 PathProgramCache]: Analyzing trace with hash 708219965, now seen corresponding path program 1 times [2024-11-14 04:03:48,740 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:03:48,740 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1106592146] [2024-11-14 04:03:48,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:03:48,740 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:03:48,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:03:48,991 INFO L134 CoverageAnalysis]: Checked inductivity of 216 backedges. 216 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 04:03:48,991 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:03:48,991 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1106592146] [2024-11-14 04:03:48,992 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1106592146] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 04:03:48,992 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-14 04:03:48,992 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-14 04:03:48,992 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1847799634] [2024-11-14 04:03:48,992 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 04:03:48,992 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-14 04:03:48,992 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 04:03:48,993 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-14 04:03:48,993 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-14 04:03:48,993 INFO L87 Difference]: Start difference. First operand 25028 states and 31130 transitions. Second operand has 3 states, 3 states have (on average 100.0) internal successors, (300), 3 states have internal predecessors, (300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:03:49,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:03:49,888 INFO L93 Difference]: Finished difference Result 53630 states and 66986 transitions. [2024-11-14 04:03:49,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-14 04:03:49,888 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 100.0) internal successors, (300), 3 states have internal predecessors, (300), 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 300 [2024-11-14 04:03:49,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:03:49,911 INFO L225 Difference]: With dead ends: 53630 [2024-11-14 04:03:49,911 INFO L226 Difference]: Without dead ends: 29032 [2024-11-14 04:03:49,926 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-14 04:03:49,926 INFO L432 NwaCegarLoop]: 230 mSDtfsCounter, 111 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 404 mSolverCounterSat, 138 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 111 SdHoareTripleChecker+Valid, 234 SdHoareTripleChecker+Invalid, 542 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 138 IncrementalHoareTripleChecker+Valid, 404 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2024-11-14 04:03:49,927 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [111 Valid, 234 Invalid, 542 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [138 Valid, 404 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2024-11-14 04:03:49,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29032 states. [2024-11-14 04:03:50,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29032 to 27888. [2024-11-14 04:03:50,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27888 states, 27887 states have (on average 1.2113888191630509) internal successors, (33782), 27887 states have internal predecessors, (33782), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:03:50,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27888 states to 27888 states and 33782 transitions. [2024-11-14 04:03:50,346 INFO L78 Accepts]: Start accepts. Automaton has 27888 states and 33782 transitions. Word has length 300 [2024-11-14 04:03:50,347 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:03:50,347 INFO L471 AbstractCegarLoop]: Abstraction has 27888 states and 33782 transitions. [2024-11-14 04:03:50,347 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 100.0) internal successors, (300), 3 states have internal predecessors, (300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:03:50,347 INFO L276 IsEmpty]: Start isEmpty. Operand 27888 states and 33782 transitions. [2024-11-14 04:03:50,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 333 [2024-11-14 04:03:50,374 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:03:50,374 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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 04:03:50,375 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-11-14 04:03:50,375 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 04:03:50,375 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:03:50,375 INFO L85 PathProgramCache]: Analyzing trace with hash -1334167602, now seen corresponding path program 1 times [2024-11-14 04:03:50,375 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:03:50,376 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1238533978] [2024-11-14 04:03:50,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:03:50,376 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:03:50,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:03:51,099 INFO L134 CoverageAnalysis]: Checked inductivity of 261 backedges. 188 proven. 73 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 04:03:51,100 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:03:51,100 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1238533978] [2024-11-14 04:03:51,100 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1238533978] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 04:03:51,100 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1668812484] [2024-11-14 04:03:51,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:03:51,100 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:03:51,100 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc1cf2b6-f131-41bf-87b9-2d216df3db6e/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 04:03:51,102 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc1cf2b6-f131-41bf-87b9-2d216df3db6e/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 04:03:51,105 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc1cf2b6-f131-41bf-87b9-2d216df3db6e/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-14 04:03:51,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:03:51,359 INFO L255 TraceCheckSpWp]: Trace formula consists of 618 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-11-14 04:03:51,370 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 04:03:51,638 INFO L134 CoverageAnalysis]: Checked inductivity of 261 backedges. 188 proven. 67 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-14 04:03:51,638 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 04:03:51,896 INFO L134 CoverageAnalysis]: Checked inductivity of 261 backedges. 188 proven. 67 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-14 04:03:51,896 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1668812484] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 04:03:51,896 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [153244706] [2024-11-14 04:03:51,922 INFO L159 IcfgInterpreter]: Started Sifa with 145 locations of interest [2024-11-14 04:03:51,923 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 04:03:51,926 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 04:03:51,930 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 04:03:51,931 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 04:04:17,679 WARN L286 SmtUtils]: Spent 8.53s 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 04:04:26,248 WARN L286 SmtUtils]: Spent 8.56s 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 04:05:17,989 WARN L176 XnfTransformerHelper]: Simplifying disjunction of 13408 conjunctions. This might take some time... [2024-11-14 04:05:33,175 INFO L192 XnfTransformerHelper]: Simplified to disjunction of 13408 conjunctions. [2024-11-14 04:05:33,300 WARN L176 XnfTransformerHelper]: Simplifying disjunction of 13408 conjunctions. This might take some time... [2024-11-14 04:05:46,916 INFO L192 XnfTransformerHelper]: Simplified to disjunction of 13408 conjunctions. [2024-11-14 04:09:30,951 WARN L286 SmtUtils]: Spent 3.73m on a formula simplification that was a NOOP. DAG size: 3750 (called from [L 210] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.BasicPredicateFactory.xJunctTerm) [2024-11-14 04:13:10,493 WARN L286 SmtUtils]: Spent 3.66m on a formula simplification that was a NOOP. DAG size: 3750 (called from [L 210] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.BasicPredicateFactory.xJunctTerm)