./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/loops-crafted-1/mono-crafted_3.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_5af3a0f6-bdcc-40a9-9ad9-15f8df15435c/bin/utaipan-verify-sOmjnqqW8E/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5af3a0f6-bdcc-40a9-9ad9-15f8df15435c/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_5af3a0f6-bdcc-40a9-9ad9-15f8df15435c/bin/utaipan-verify-sOmjnqqW8E/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5af3a0f6-bdcc-40a9-9ad9-15f8df15435c/bin/utaipan-verify-sOmjnqqW8E/config/TaipanReach.xml -i ../../sv-benchmarks/c/loops-crafted-1/mono-crafted_3.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5af3a0f6-bdcc-40a9-9ad9-15f8df15435c/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_5af3a0f6-bdcc-40a9-9ad9-15f8df15435c/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 4548c451706b7658e6a882e8eef66dc3c360e6aea0e4326d7cc0b87e2b58239c --- Real Ultimate output --- This is Ultimate 0.3.0-dev-826ab2b [2024-11-13 23:43:36,274 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-13 23:43:36,343 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5af3a0f6-bdcc-40a9-9ad9-15f8df15435c/bin/utaipan-verify-sOmjnqqW8E/config/svcomp-Reach-32bit-Taipan_Default.epf [2024-11-13 23:43:36,348 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-13 23:43:36,348 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-13 23:43:36,371 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-13 23:43:36,372 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-13 23:43:36,372 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-13 23:43:36,372 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-13 23:43:36,372 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-13 23:43:36,373 INFO L153 SettingsManager]: * User list type=DISABLED [2024-11-13 23:43:36,373 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2024-11-13 23:43:36,373 INFO L153 SettingsManager]: * Explicit value domain=true [2024-11-13 23:43:36,373 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2024-11-13 23:43:36,373 INFO L153 SettingsManager]: * Octagon Domain=false [2024-11-13 23:43:36,373 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2024-11-13 23:43:36,374 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2024-11-13 23:43:36,374 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2024-11-13 23:43:36,374 INFO L153 SettingsManager]: * Interval Domain=false [2024-11-13 23:43:36,374 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2024-11-13 23:43:36,374 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2024-11-13 23:43:36,375 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2024-11-13 23:43:36,375 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-13 23:43:36,375 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-13 23:43:36,375 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-13 23:43:36,375 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-13 23:43:36,376 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-13 23:43:36,376 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-13 23:43:36,376 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-13 23:43:36,376 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-13 23:43:36,376 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-13 23:43:36,376 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-13 23:43:36,376 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-13 23:43:36,377 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-13 23:43:36,377 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-13 23:43:36,377 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-13 23:43:36,377 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-13 23:43:36,377 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-13 23:43:36,377 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2024-11-13 23:43:36,377 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-13 23:43:36,377 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-13 23:43:36,377 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-13 23:43:36,377 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2024-11-13 23:43:36,378 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-13 23:43:36,378 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-13 23:43:36,378 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2024-11-13 23:43:36,378 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-13 23:43:36,378 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_5af3a0f6-bdcc-40a9-9ad9-15f8df15435c/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 -> 4548c451706b7658e6a882e8eef66dc3c360e6aea0e4326d7cc0b87e2b58239c [2024-11-13 23:43:36,656 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-13 23:43:36,665 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-13 23:43:36,669 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-13 23:43:36,672 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-13 23:43:36,673 INFO L274 PluginConnector]: CDTParser initialized [2024-11-13 23:43:36,675 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5af3a0f6-bdcc-40a9-9ad9-15f8df15435c/bin/utaipan-verify-sOmjnqqW8E/../../sv-benchmarks/c/loops-crafted-1/mono-crafted_3.c Unable to find full path for "g++" [2024-11-13 23:43:38,863 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-13 23:43:39,131 INFO L384 CDTParser]: Found 1 translation units. [2024-11-13 23:43:39,132 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5af3a0f6-bdcc-40a9-9ad9-15f8df15435c/sv-benchmarks/c/loops-crafted-1/mono-crafted_3.c [2024-11-13 23:43:39,140 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5af3a0f6-bdcc-40a9-9ad9-15f8df15435c/bin/utaipan-verify-sOmjnqqW8E/data/d25be1fef/ae2ac773858e4816a51947a4836c1959/FLAGee2932417 [2024-11-13 23:43:39,164 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5af3a0f6-bdcc-40a9-9ad9-15f8df15435c/bin/utaipan-verify-sOmjnqqW8E/data/d25be1fef/ae2ac773858e4816a51947a4836c1959 [2024-11-13 23:43:39,167 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-13 23:43:39,168 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-13 23:43:39,170 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-13 23:43:39,170 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-13 23:43:39,176 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-13 23:43:39,177 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.11 11:43:39" (1/1) ... [2024-11-13 23:43:39,178 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@32cfa02a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 11:43:39, skipping insertion in model container [2024-11-13 23:43:39,181 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.11 11:43:39" (1/1) ... [2024-11-13 23:43:39,197 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-13 23:43:39,368 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_5af3a0f6-bdcc-40a9-9ad9-15f8df15435c/sv-benchmarks/c/loops-crafted-1/mono-crafted_3.c[318,331] [2024-11-13 23:43:39,386 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-13 23:43:39,397 INFO L200 MainTranslator]: Completed pre-run [2024-11-13 23:43:39,410 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_5af3a0f6-bdcc-40a9-9ad9-15f8df15435c/sv-benchmarks/c/loops-crafted-1/mono-crafted_3.c[318,331] [2024-11-13 23:43:39,415 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-13 23:43:39,434 INFO L204 MainTranslator]: Completed translation [2024-11-13 23:43:39,435 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 11:43:39 WrapperNode [2024-11-13 23:43:39,435 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-13 23:43:39,438 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-13 23:43:39,438 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-13 23:43:39,438 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-13 23:43:39,445 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 11:43:39" (1/1) ... [2024-11-13 23:43:39,452 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 11:43:39" (1/1) ... [2024-11-13 23:43:39,470 INFO L138 Inliner]: procedures = 12, calls = 8, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 43 [2024-11-13 23:43:39,470 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-13 23:43:39,471 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-13 23:43:39,471 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-13 23:43:39,472 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-13 23:43:39,480 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 11:43:39" (1/1) ... [2024-11-13 23:43:39,481 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 11:43:39" (1/1) ... [2024-11-13 23:43:39,482 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 11:43:39" (1/1) ... [2024-11-13 23:43:39,483 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 11:43:39" (1/1) ... [2024-11-13 23:43:39,486 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 11:43:39" (1/1) ... [2024-11-13 23:43:39,491 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 11:43:39" (1/1) ... [2024-11-13 23:43:39,493 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 11:43:39" (1/1) ... [2024-11-13 23:43:39,493 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 11:43:39" (1/1) ... [2024-11-13 23:43:39,498 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-13 23:43:39,499 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-13 23:43:39,499 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-13 23:43:39,499 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-13 23:43:39,500 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 11:43:39" (1/1) ... [2024-11-13 23:43:39,514 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2024-11-13 23:43:39,531 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5af3a0f6-bdcc-40a9-9ad9-15f8df15435c/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-13 23:43:39,549 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5af3a0f6-bdcc-40a9-9ad9-15f8df15435c/bin/utaipan-verify-sOmjnqqW8E/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2024-11-13 23:43:39,552 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5af3a0f6-bdcc-40a9-9ad9-15f8df15435c/bin/utaipan-verify-sOmjnqqW8E/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2024-11-13 23:43:39,583 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-13 23:43:39,583 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-13 23:43:39,583 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-13 23:43:39,583 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2024-11-13 23:43:39,667 INFO L238 CfgBuilder]: Building ICFG [2024-11-13 23:43:39,669 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-13 23:43:39,791 INFO L? ?]: Removed 9 outVars from TransFormulas that were not future-live. [2024-11-13 23:43:39,791 INFO L287 CfgBuilder]: Performing block encoding [2024-11-13 23:43:39,849 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-13 23:43:39,849 INFO L316 CfgBuilder]: Removed 2 assume(true) statements. [2024-11-13 23:43:39,850 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.11 11:43:39 BoogieIcfgContainer [2024-11-13 23:43:39,850 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-13 23:43:39,852 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-13 23:43:39,853 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-13 23:43:39,857 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-13 23:43:39,858 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.11 11:43:39" (1/3) ... [2024-11-13 23:43:39,858 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3d53b9ed and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.11 11:43:39, skipping insertion in model container [2024-11-13 23:43:39,859 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 11:43:39" (2/3) ... [2024-11-13 23:43:39,859 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3d53b9ed and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.11 11:43:39, skipping insertion in model container [2024-11-13 23:43:39,859 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.11 11:43:39" (3/3) ... [2024-11-13 23:43:39,861 INFO L112 eAbstractionObserver]: Analyzing ICFG mono-crafted_3.c [2024-11-13 23:43:39,877 INFO L217 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-13 23:43:39,879 INFO L154 ceAbstractionStarter]: Applying trace abstraction to ICFG mono-crafted_3.c that has 1 procedures, 8 locations, 1 initial locations, 2 loop locations, and 1 error locations. [2024-11-13 23:43:39,931 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-13 23:43:39,947 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;@65ddbd2c, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-13 23:43:39,947 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-11-13 23:43:39,952 INFO L276 IsEmpty]: Start isEmpty. Operand has 8 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 7 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 23:43:39,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2024-11-13 23:43:39,960 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 23:43:39,961 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2024-11-13 23:43:39,961 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 23:43:39,967 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 23:43:39,967 INFO L85 PathProgramCache]: Analyzing trace with hash 71694541, now seen corresponding path program 1 times [2024-11-13 23:43:39,975 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-13 23:43:39,976 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1947363725] [2024-11-13 23:43:39,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 23:43:39,977 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 23:43:40,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 23:43:40,204 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 23:43:40,205 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-13 23:43:40,205 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1947363725] [2024-11-13 23:43:40,208 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1947363725] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 23:43:40,209 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-13 23:43:40,209 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-13 23:43:40,210 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1082056739] [2024-11-13 23:43:40,211 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 23:43:40,217 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-13 23:43:40,217 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-13 23:43:40,241 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-13 23:43:40,242 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-13 23:43:40,245 INFO L87 Difference]: Start difference. First operand has 8 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 7 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 23:43:40,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 23:43:40,290 INFO L93 Difference]: Finished difference Result 15 states and 19 transitions. [2024-11-13 23:43:40,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-13 23:43:40,298 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2024-11-13 23:43:40,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 23:43:40,305 INFO L225 Difference]: With dead ends: 15 [2024-11-13 23:43:40,305 INFO L226 Difference]: Without dead ends: 7 [2024-11-13 23:43:40,309 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 [2024-11-13 23:43:40,312 INFO L432 NwaCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 7 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-13 23:43:40,312 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 7 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-13 23:43:40,329 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7 states. [2024-11-13 23:43:40,342 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7 to 7. [2024-11-13 23:43:40,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 6 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 23:43:40,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 8 transitions. [2024-11-13 23:43:40,347 INFO L78 Accepts]: Start accepts. Automaton has 7 states and 8 transitions. Word has length 5 [2024-11-13 23:43:40,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 23:43:40,348 INFO L471 AbstractCegarLoop]: Abstraction has 7 states and 8 transitions. [2024-11-13 23:43:40,348 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 23:43:40,348 INFO L276 IsEmpty]: Start isEmpty. Operand 7 states and 8 transitions. [2024-11-13 23:43:40,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2024-11-13 23:43:40,350 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 23:43:40,350 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2024-11-13 23:43:40,351 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-13 23:43:40,351 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 23:43:40,351 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 23:43:40,351 INFO L85 PathProgramCache]: Analyzing trace with hash -2070545304, now seen corresponding path program 1 times [2024-11-13 23:43:40,352 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-13 23:43:40,352 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1156735148] [2024-11-13 23:43:40,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 23:43:40,352 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 23:43:40,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 23:43:40,570 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 23:43:40,570 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-13 23:43:40,570 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1156735148] [2024-11-13 23:43:40,570 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1156735148] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 23:43:40,570 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1750993796] [2024-11-13 23:43:40,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 23:43:40,571 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 23:43:40,571 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5af3a0f6-bdcc-40a9-9ad9-15f8df15435c/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-13 23:43:40,576 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5af3a0f6-bdcc-40a9-9ad9-15f8df15435c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 23:43:40,578 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5af3a0f6-bdcc-40a9-9ad9-15f8df15435c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-13 23:43:40,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 23:43:40,656 INFO L255 TraceCheckSpWp]: Trace formula consists of 36 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-11-13 23:43:40,663 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 23:43:40,734 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 23:43:40,736 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 23:43:40,955 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 23:43:40,955 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1750993796] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-13 23:43:40,956 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-13 23:43:40,956 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3, 3] total 6 [2024-11-13 23:43:40,958 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1345404519] [2024-11-13 23:43:40,958 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 23:43:40,960 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-13 23:43:40,960 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-13 23:43:40,960 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-13 23:43:40,960 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-11-13 23:43:40,961 INFO L87 Difference]: Start difference. First operand 7 states and 8 transitions. Second operand has 4 states, 4 states have (on average 1.5) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 23:43:40,986 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 23:43:40,986 INFO L93 Difference]: Finished difference Result 11 states and 12 transitions. [2024-11-13 23:43:40,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-13 23:43:40,987 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.5) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2024-11-13 23:43:40,987 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 23:43:40,987 INFO L225 Difference]: With dead ends: 11 [2024-11-13 23:43:40,987 INFO L226 Difference]: Without dead ends: 8 [2024-11-13 23:43:40,987 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-11-13 23:43:40,988 INFO L432 NwaCegarLoop]: 2 mSDtfsCounter, 0 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-13 23:43:40,989 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 6 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-13 23:43:40,989 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8 states. [2024-11-13 23:43:40,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8 to 8. [2024-11-13 23:43:40,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8 states, 7 states have (on average 1.2857142857142858) internal successors, (9), 7 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 23:43:40,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 9 transitions. [2024-11-13 23:43:40,993 INFO L78 Accepts]: Start accepts. Automaton has 8 states and 9 transitions. Word has length 6 [2024-11-13 23:43:40,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 23:43:40,994 INFO L471 AbstractCegarLoop]: Abstraction has 8 states and 9 transitions. [2024-11-13 23:43:40,994 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.5) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 23:43:40,994 INFO L276 IsEmpty]: Start isEmpty. Operand 8 states and 9 transitions. [2024-11-13 23:43:40,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2024-11-13 23:43:40,995 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 23:43:40,995 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-11-13 23:43:41,011 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5af3a0f6-bdcc-40a9-9ad9-15f8df15435c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-13 23:43:41,199 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5af3a0f6-bdcc-40a9-9ad9-15f8df15435c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 23:43:41,199 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 23:43:41,200 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 23:43:41,200 INFO L85 PathProgramCache]: Analyzing trace with hash 236964002, now seen corresponding path program 1 times [2024-11-13 23:43:41,200 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-13 23:43:41,201 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2782923] [2024-11-13 23:43:41,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 23:43:41,201 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 23:43:41,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 23:43:41,371 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-13 23:43:41,373 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-13 23:43:41,373 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2782923] [2024-11-13 23:43:41,373 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2782923] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 23:43:41,373 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [171313892] [2024-11-13 23:43:41,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 23:43:41,373 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 23:43:41,373 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5af3a0f6-bdcc-40a9-9ad9-15f8df15435c/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-13 23:43:41,377 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5af3a0f6-bdcc-40a9-9ad9-15f8df15435c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 23:43:41,381 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5af3a0f6-bdcc-40a9-9ad9-15f8df15435c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-13 23:43:41,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 23:43:41,446 INFO L255 TraceCheckSpWp]: Trace formula consists of 43 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-11-13 23:43:41,448 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 23:43:41,505 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 23:43:41,505 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 23:43:41,688 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 23:43:41,689 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [171313892] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 23:43:41,689 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1125565645] [2024-11-13 23:43:41,708 INFO L159 IcfgInterpreter]: Started Sifa with 6 locations of interest [2024-11-13 23:43:41,708 INFO L166 IcfgInterpreter]: Building call graph [2024-11-13 23:43:41,712 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-13 23:43:41,716 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-13 23:43:41,717 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-13 23:43:41,957 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-13 23:43:42,066 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '155#(<= 1 |#StackHeapBarrier|)' at error location [2024-11-13 23:43:42,066 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-13 23:43:42,067 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 23:43:42,067 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 4, 4] total 9 [2024-11-13 23:43:42,067 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [174628840] [2024-11-13 23:43:42,067 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 23:43:42,067 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-11-13 23:43:42,067 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-13 23:43:42,068 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-11-13 23:43:42,069 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2024-11-13 23:43:42,070 INFO L87 Difference]: Start difference. First operand 8 states and 9 transitions. Second operand has 10 states, 10 states have (on average 1.7) internal successors, (17), 9 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 23:43:42,134 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 23:43:42,135 INFO L93 Difference]: Finished difference Result 17 states and 22 transitions. [2024-11-13 23:43:42,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-13 23:43:42,136 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.7) internal successors, (17), 9 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2024-11-13 23:43:42,136 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 23:43:42,136 INFO L225 Difference]: With dead ends: 17 [2024-11-13 23:43:42,136 INFO L226 Difference]: Without dead ends: 12 [2024-11-13 23:43:42,137 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2024-11-13 23:43:42,140 INFO L432 NwaCegarLoop]: 2 mSDtfsCounter, 0 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-13 23:43:42,140 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 12 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-13 23:43:42,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2024-11-13 23:43:42,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2024-11-13 23:43:42,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12 states, 11 states have (on average 1.1818181818181819) internal successors, (13), 11 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 23:43:42,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 13 transitions. [2024-11-13 23:43:42,147 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 13 transitions. Word has length 7 [2024-11-13 23:43:42,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 23:43:42,147 INFO L471 AbstractCegarLoop]: Abstraction has 12 states and 13 transitions. [2024-11-13 23:43:42,148 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 1.7) internal successors, (17), 9 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 23:43:42,148 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 13 transitions. [2024-11-13 23:43:42,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2024-11-13 23:43:42,148 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 23:43:42,148 INFO L215 NwaCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1] [2024-11-13 23:43:42,170 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5af3a0f6-bdcc-40a9-9ad9-15f8df15435c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-11-13 23:43:42,349 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5af3a0f6-bdcc-40a9-9ad9-15f8df15435c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 23:43:42,349 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 23:43:42,349 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 23:43:42,349 INFO L85 PathProgramCache]: Analyzing trace with hash -679657427, now seen corresponding path program 2 times [2024-11-13 23:43:42,350 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-13 23:43:42,350 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [266738810] [2024-11-13 23:43:42,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 23:43:42,350 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 23:43:42,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 23:43:42,578 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-13 23:43:42,578 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-13 23:43:42,578 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [266738810] [2024-11-13 23:43:42,579 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [266738810] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 23:43:42,579 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1765468472] [2024-11-13 23:43:42,579 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-13 23:43:42,579 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 23:43:42,579 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5af3a0f6-bdcc-40a9-9ad9-15f8df15435c/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-13 23:43:42,582 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5af3a0f6-bdcc-40a9-9ad9-15f8df15435c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 23:43:42,584 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5af3a0f6-bdcc-40a9-9ad9-15f8df15435c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-13 23:43:42,649 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-13 23:43:42,649 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-13 23:43:42,650 INFO L255 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-11-13 23:43:42,652 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 23:43:42,727 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-11-13 23:43:42,727 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 23:43:42,890 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-11-13 23:43:42,891 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1765468472] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 23:43:42,891 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [259617174] [2024-11-13 23:43:42,894 INFO L159 IcfgInterpreter]: Started Sifa with 6 locations of interest [2024-11-13 23:43:42,895 INFO L166 IcfgInterpreter]: Building call graph [2024-11-13 23:43:42,895 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-13 23:43:42,895 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-13 23:43:42,895 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-13 23:43:43,059 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-13 23:43:43,150 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '284#(<= 1 |#StackHeapBarrier|)' at error location [2024-11-13 23:43:43,151 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-13 23:43:43,151 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 23:43:43,151 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 4, 4] total 13 [2024-11-13 23:43:43,151 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [235389063] [2024-11-13 23:43:43,151 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 23:43:43,151 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-11-13 23:43:43,152 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-13 23:43:43,153 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-11-13 23:43:43,153 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=233, Unknown=0, NotChecked=0, Total=306 [2024-11-13 23:43:43,154 INFO L87 Difference]: Start difference. First operand 12 states and 13 transitions. Second operand has 14 states, 14 states have (on average 1.5) internal successors, (21), 13 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 23:43:43,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 23:43:43,283 INFO L93 Difference]: Finished difference Result 25 states and 31 transitions. [2024-11-13 23:43:43,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-11-13 23:43:43,284 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.5) internal successors, (21), 13 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2024-11-13 23:43:43,284 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 23:43:43,284 INFO L225 Difference]: With dead ends: 25 [2024-11-13 23:43:43,284 INFO L226 Difference]: Without dead ends: 17 [2024-11-13 23:43:43,285 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=138, Invalid=368, Unknown=0, NotChecked=0, Total=506 [2024-11-13 23:43:43,286 INFO L432 NwaCegarLoop]: 2 mSDtfsCounter, 0 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-13 23:43:43,288 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 18 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-13 23:43:43,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2024-11-13 23:43:43,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2024-11-13 23:43:43,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 16 states have (on average 1.125) internal successors, (18), 16 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 23:43:43,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 18 transitions. [2024-11-13 23:43:43,297 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 18 transitions. Word has length 11 [2024-11-13 23:43:43,297 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 23:43:43,298 INFO L471 AbstractCegarLoop]: Abstraction has 17 states and 18 transitions. [2024-11-13 23:43:43,298 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.5) internal successors, (21), 13 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 23:43:43,298 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 18 transitions. [2024-11-13 23:43:43,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2024-11-13 23:43:43,299 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 23:43:43,299 INFO L215 NwaCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1] [2024-11-13 23:43:43,320 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5af3a0f6-bdcc-40a9-9ad9-15f8df15435c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-11-13 23:43:43,499 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5af3a0f6-bdcc-40a9-9ad9-15f8df15435c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 23:43:43,500 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 23:43:43,500 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 23:43:43,500 INFO L85 PathProgramCache]: Analyzing trace with hash -1189783875, now seen corresponding path program 3 times [2024-11-13 23:43:43,500 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-13 23:43:43,500 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2016180017] [2024-11-13 23:43:43,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 23:43:43,501 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 23:43:43,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 23:43:44,188 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 23:43:44,190 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-13 23:43:44,190 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2016180017] [2024-11-13 23:43:44,190 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2016180017] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 23:43:44,190 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1769255722] [2024-11-13 23:43:44,190 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-13 23:43:44,191 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 23:43:44,192 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5af3a0f6-bdcc-40a9-9ad9-15f8df15435c/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-13 23:43:44,196 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5af3a0f6-bdcc-40a9-9ad9-15f8df15435c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 23:43:44,198 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5af3a0f6-bdcc-40a9-9ad9-15f8df15435c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-13 23:43:44,264 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-13 23:43:44,264 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-13 23:43:44,266 INFO L255 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-11-13 23:43:44,272 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 23:43:44,356 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 23:43:44,356 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 23:43:45,668 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 23:43:45,668 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1769255722] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 23:43:45,668 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [520555522] [2024-11-13 23:43:45,672 INFO L159 IcfgInterpreter]: Started Sifa with 6 locations of interest [2024-11-13 23:43:45,672 INFO L166 IcfgInterpreter]: Building call graph [2024-11-13 23:43:45,672 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-13 23:43:45,672 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-13 23:43:45,673 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-13 23:43:45,780 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-13 23:43:45,867 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '488#(<= 1 |#StackHeapBarrier|)' at error location [2024-11-13 23:43:45,867 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-13 23:43:45,867 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 23:43:45,867 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 26 [2024-11-13 23:43:45,867 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [449507433] [2024-11-13 23:43:45,868 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 23:43:45,868 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2024-11-13 23:43:45,868 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-13 23:43:45,869 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2024-11-13 23:43:45,869 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=357, Invalid=573, Unknown=0, NotChecked=0, Total=930 [2024-11-13 23:43:45,870 INFO L87 Difference]: Start difference. First operand 17 states and 18 transitions. Second operand has 27 states, 27 states have (on average 1.1851851851851851) internal successors, (32), 26 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 23:43:45,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 23:43:45,922 INFO L93 Difference]: Finished difference Result 27 states and 34 transitions. [2024-11-13 23:43:45,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-11-13 23:43:45,922 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.1851851851851851) internal successors, (32), 26 states have internal predecessors, (32), 0 states have call successors, (0), 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 16 [2024-11-13 23:43:45,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 23:43:45,923 INFO L225 Difference]: With dead ends: 27 [2024-11-13 23:43:45,923 INFO L226 Difference]: Without dead ends: 24 [2024-11-13 23:43:45,924 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 207 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=357, Invalid=573, Unknown=0, NotChecked=0, Total=930 [2024-11-13 23:43:45,925 INFO L432 NwaCegarLoop]: 2 mSDtfsCounter, 0 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 8 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-13 23:43:45,925 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 8 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-13 23:43:45,926 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2024-11-13 23:43:45,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2024-11-13 23:43:45,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 23 states have (on average 1.0869565217391304) internal successors, (25), 23 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 23:43:45,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 25 transitions. [2024-11-13 23:43:45,932 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 25 transitions. Word has length 16 [2024-11-13 23:43:45,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 23:43:45,933 INFO L471 AbstractCegarLoop]: Abstraction has 24 states and 25 transitions. [2024-11-13 23:43:45,933 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.1851851851851851) internal successors, (32), 26 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 23:43:45,933 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 25 transitions. [2024-11-13 23:43:45,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2024-11-13 23:43:45,934 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 23:43:45,934 INFO L215 NwaCegarLoop]: trace histogram [12, 6, 1, 1, 1, 1, 1] [2024-11-13 23:43:45,954 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5af3a0f6-bdcc-40a9-9ad9-15f8df15435c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-11-13 23:43:46,135 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5af3a0f6-bdcc-40a9-9ad9-15f8df15435c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 23:43:46,135 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 23:43:46,136 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 23:43:46,136 INFO L85 PathProgramCache]: Analyzing trace with hash 96315117, now seen corresponding path program 4 times [2024-11-13 23:43:46,136 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-13 23:43:46,136 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [967733681] [2024-11-13 23:43:46,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 23:43:46,136 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 23:43:46,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 23:43:46,950 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 0 proven. 96 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-13 23:43:46,951 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-13 23:43:46,951 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [967733681] [2024-11-13 23:43:46,951 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [967733681] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 23:43:46,951 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1346435592] [2024-11-13 23:43:46,951 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-13 23:43:46,951 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 23:43:46,952 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5af3a0f6-bdcc-40a9-9ad9-15f8df15435c/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-13 23:43:46,955 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5af3a0f6-bdcc-40a9-9ad9-15f8df15435c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 23:43:46,958 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5af3a0f6-bdcc-40a9-9ad9-15f8df15435c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-13 23:43:47,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 23:43:47,032 INFO L255 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-13 23:43:47,035 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 23:43:47,202 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2024-11-13 23:43:47,203 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 23:43:47,582 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2024-11-13 23:43:47,583 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1346435592] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 23:43:47,583 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [524082338] [2024-11-13 23:43:47,585 INFO L159 IcfgInterpreter]: Started Sifa with 6 locations of interest [2024-11-13 23:43:47,586 INFO L166 IcfgInterpreter]: Building call graph [2024-11-13 23:43:47,586 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-13 23:43:47,587 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-13 23:43:47,587 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-13 23:43:47,676 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-13 23:43:47,781 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '749#(<= 1 |#StackHeapBarrier|)' at error location [2024-11-13 23:43:47,781 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-13 23:43:47,781 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 23:43:47,782 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 8, 8] total 33 [2024-11-13 23:43:47,782 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1062486910] [2024-11-13 23:43:47,782 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 23:43:47,782 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2024-11-13 23:43:47,783 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-13 23:43:47,784 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2024-11-13 23:43:47,785 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=313, Invalid=1093, Unknown=0, NotChecked=0, Total=1406 [2024-11-13 23:43:47,785 INFO L87 Difference]: Start difference. First operand 24 states and 25 transitions. Second operand has 34 states, 34 states have (on average 1.1764705882352942) internal successors, (40), 33 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 23:43:48,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 23:43:48,323 INFO L93 Difference]: Finished difference Result 49 states and 59 transitions. [2024-11-13 23:43:48,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2024-11-13 23:43:48,325 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 1.1764705882352942) internal successors, (40), 33 states have internal predecessors, (40), 0 states have call successors, (0), 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 23 [2024-11-13 23:43:48,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 23:43:48,325 INFO L225 Difference]: With dead ends: 49 [2024-11-13 23:43:48,327 INFO L226 Difference]: Without dead ends: 33 [2024-11-13 23:43:48,328 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 50 SyntacticMatches, 2 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 633 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=748, Invalid=1904, Unknown=0, NotChecked=0, Total=2652 [2024-11-13 23:43:48,330 INFO L432 NwaCegarLoop]: 2 mSDtfsCounter, 0 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 64 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 65 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 64 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-13 23:43:48,331 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 26 Invalid, 65 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 64 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-13 23:43:48,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2024-11-13 23:43:48,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2024-11-13 23:43:48,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 32 states have (on average 1.0625) internal successors, (34), 32 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 23:43:48,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 34 transitions. [2024-11-13 23:43:48,337 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 34 transitions. Word has length 23 [2024-11-13 23:43:48,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 23:43:48,338 INFO L471 AbstractCegarLoop]: Abstraction has 33 states and 34 transitions. [2024-11-13 23:43:48,338 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 1.1764705882352942) internal successors, (40), 33 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 23:43:48,338 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 34 transitions. [2024-11-13 23:43:48,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2024-11-13 23:43:48,339 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 23:43:48,339 INFO L215 NwaCegarLoop]: trace histogram [14, 13, 1, 1, 1, 1, 1] [2024-11-13 23:43:48,360 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5af3a0f6-bdcc-40a9-9ad9-15f8df15435c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2024-11-13 23:43:48,539 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5af3a0f6-bdcc-40a9-9ad9-15f8df15435c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 23:43:48,540 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 23:43:48,540 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 23:43:48,540 INFO L85 PathProgramCache]: Analyzing trace with hash 612352317, now seen corresponding path program 5 times [2024-11-13 23:43:48,540 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-13 23:43:48,540 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [719642476] [2024-11-13 23:43:48,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 23:43:48,540 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 23:43:48,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 23:43:49,631 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2024-11-13 23:43:49,632 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-13 23:43:49,632 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [719642476] [2024-11-13 23:43:49,632 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [719642476] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 23:43:49,632 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [761475413] [2024-11-13 23:43:49,632 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-13 23:43:49,632 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 23:43:49,632 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5af3a0f6-bdcc-40a9-9ad9-15f8df15435c/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-13 23:43:49,635 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5af3a0f6-bdcc-40a9-9ad9-15f8df15435c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 23:43:49,639 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5af3a0f6-bdcc-40a9-9ad9-15f8df15435c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-13 23:43:49,745 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2024-11-13 23:43:49,745 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-13 23:43:49,747 INFO L255 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-11-13 23:43:49,755 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 23:43:49,939 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2024-11-13 23:43:49,940 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 23:43:50,781 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2024-11-13 23:43:50,781 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [761475413] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 23:43:50,782 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [635148012] [2024-11-13 23:43:50,784 INFO L159 IcfgInterpreter]: Started Sifa with 6 locations of interest [2024-11-13 23:43:50,784 INFO L166 IcfgInterpreter]: Building call graph [2024-11-13 23:43:50,784 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-13 23:43:50,784 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-13 23:43:50,784 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-13 23:43:50,878 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-13 23:43:50,982 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1159#(<= 1 |#StackHeapBarrier|)' at error location [2024-11-13 23:43:50,982 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-13 23:43:50,982 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 23:43:50,983 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 38 [2024-11-13 23:43:50,983 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1152186343] [2024-11-13 23:43:50,983 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 23:43:50,983 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2024-11-13 23:43:50,983 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-13 23:43:50,985 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2024-11-13 23:43:50,986 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=753, Invalid=1053, Unknown=0, NotChecked=0, Total=1806 [2024-11-13 23:43:50,986 INFO L87 Difference]: Start difference. First operand 33 states and 34 transitions. Second operand has 39 states, 39 states have (on average 1.1538461538461537) internal successors, (45), 38 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 23:43:51,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 23:43:51,080 INFO L93 Difference]: Finished difference Result 72 states and 95 transitions. [2024-11-13 23:43:51,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2024-11-13 23:43:51,081 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 1.1538461538461537) internal successors, (45), 38 states have internal predecessors, (45), 0 states have call successors, (0), 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 32 [2024-11-13 23:43:51,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 23:43:51,082 INFO L225 Difference]: With dead ends: 72 [2024-11-13 23:43:51,082 INFO L226 Difference]: Without dead ends: 55 [2024-11-13 23:43:51,083 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 581 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=753, Invalid=1053, Unknown=0, NotChecked=0, Total=1806 [2024-11-13 23:43:51,084 INFO L432 NwaCegarLoop]: 3 mSDtfsCounter, 0 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 11 SdHoareTripleChecker+Invalid, 55 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 53 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-13 23:43:51,085 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 11 Invalid, 55 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 53 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-13 23:43:51,085 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2024-11-13 23:43:51,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2024-11-13 23:43:51,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 54 states have (on average 1.037037037037037) internal successors, (56), 54 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 23:43:51,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 56 transitions. [2024-11-13 23:43:51,097 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 56 transitions. Word has length 32 [2024-11-13 23:43:51,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 23:43:51,097 INFO L471 AbstractCegarLoop]: Abstraction has 55 states and 56 transitions. [2024-11-13 23:43:51,097 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 1.1538461538461537) internal successors, (45), 38 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 23:43:51,098 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 56 transitions. [2024-11-13 23:43:51,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2024-11-13 23:43:51,099 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 23:43:51,099 INFO L215 NwaCegarLoop]: trace histogram [36, 13, 1, 1, 1, 1, 1] [2024-11-13 23:43:51,123 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5af3a0f6-bdcc-40a9-9ad9-15f8df15435c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2024-11-13 23:43:51,299 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5af3a0f6-bdcc-40a9-9ad9-15f8df15435c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 23:43:51,300 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 23:43:51,300 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 23:43:51,300 INFO L85 PathProgramCache]: Analyzing trace with hash -1583775715, now seen corresponding path program 6 times [2024-11-13 23:43:51,300 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-13 23:43:51,300 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [403077714] [2024-11-13 23:43:51,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 23:43:51,300 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 23:43:51,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 23:43:55,405 INFO L134 CoverageAnalysis]: Checked inductivity of 757 backedges. 0 proven. 666 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2024-11-13 23:43:55,405 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-13 23:43:55,405 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [403077714] [2024-11-13 23:43:55,405 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [403077714] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 23:43:55,406 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [945939145] [2024-11-13 23:43:55,406 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-13 23:43:55,406 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 23:43:55,406 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5af3a0f6-bdcc-40a9-9ad9-15f8df15435c/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-13 23:43:55,408 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5af3a0f6-bdcc-40a9-9ad9-15f8df15435c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 23:43:55,412 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5af3a0f6-bdcc-40a9-9ad9-15f8df15435c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-13 23:43:55,540 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-13 23:43:55,541 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-13 23:43:55,544 INFO L255 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 52 conjuncts are in the unsatisfiable core [2024-11-13 23:43:55,556 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 23:43:57,694 INFO L134 CoverageAnalysis]: Checked inductivity of 757 backedges. 0 proven. 757 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 23:43:57,694 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 23:45:14,588 INFO L134 CoverageAnalysis]: Checked inductivity of 757 backedges. 666 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 23:45:14,589 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [945939145] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 23:45:14,589 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [992065904] [2024-11-13 23:45:14,591 INFO L159 IcfgInterpreter]: Started Sifa with 6 locations of interest [2024-11-13 23:45:14,591 INFO L166 IcfgInterpreter]: Building call graph [2024-11-13 23:45:14,591 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-13 23:45:14,591 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-13 23:45:14,591 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-13 23:45:14,651 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-13 23:45:14,940 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1863#(<= 1 |#StackHeapBarrier|)' at error location [2024-11-13 23:45:14,940 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-13 23:45:14,940 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 23:45:14,940 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 51, 51] total 138 [2024-11-13 23:45:14,940 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [654124877] [2024-11-13 23:45:14,940 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 23:45:14,941 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 139 states [2024-11-13 23:45:14,941 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-13 23:45:14,946 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 139 interpolants. [2024-11-13 23:45:14,954 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6318, Invalid=13988, Unknown=0, NotChecked=0, Total=20306 [2024-11-13 23:45:14,955 INFO L87 Difference]: Start difference. First operand 55 states and 56 transitions. Second operand has 139 states, 139 states have (on average 1.0503597122302157) internal successors, (146), 138 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 23:45:15,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 23:45:15,351 INFO L93 Difference]: Finished difference Result 88 states and 105 transitions. [2024-11-13 23:45:15,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2024-11-13 23:45:15,352 INFO L78 Accepts]: Start accepts. Automaton has has 139 states, 139 states have (on average 1.0503597122302157) internal successors, (146), 138 states have internal predecessors, (146), 0 states have call successors, (0), 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 54 [2024-11-13 23:45:15,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 23:45:15,353 INFO L225 Difference]: With dead ends: 88 [2024-11-13 23:45:15,355 INFO L226 Difference]: Without dead ends: 71 [2024-11-13 23:45:15,360 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 200 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 143 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8941 ImplicationChecksByTransitivity, 27.0s TimeCoverageRelationStatistics Valid=6561, Invalid=14319, Unknown=0, NotChecked=0, Total=20880 [2024-11-13 23:45:15,361 INFO L432 NwaCegarLoop]: 2 mSDtfsCounter, 0 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 115 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 128 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 115 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-13 23:45:15,362 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 24 Invalid, 128 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 115 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-13 23:45:15,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2024-11-13 23:45:15,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 71. [2024-11-13 23:45:15,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 70 states have (on average 1.0285714285714285) internal successors, (72), 70 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 23:45:15,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 72 transitions. [2024-11-13 23:45:15,379 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 72 transitions. Word has length 54 [2024-11-13 23:45:15,380 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 23:45:15,380 INFO L471 AbstractCegarLoop]: Abstraction has 71 states and 72 transitions. [2024-11-13 23:45:15,380 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 139 states, 139 states have (on average 1.0503597122302157) internal successors, (146), 138 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 23:45:15,380 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 72 transitions. [2024-11-13 23:45:15,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2024-11-13 23:45:15,381 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 23:45:15,383 INFO L215 NwaCegarLoop]: trace histogram [37, 28, 1, 1, 1, 1, 1] [2024-11-13 23:45:15,404 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5af3a0f6-bdcc-40a9-9ad9-15f8df15435c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-11-13 23:45:15,587 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5af3a0f6-bdcc-40a9-9ad9-15f8df15435c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 23:45:15,588 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 23:45:15,588 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 23:45:15,588 INFO L85 PathProgramCache]: Analyzing trace with hash -906484440, now seen corresponding path program 7 times [2024-11-13 23:45:15,588 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-13 23:45:15,589 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1384449740] [2024-11-13 23:45:15,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 23:45:15,589 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 23:45:15,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 23:45:21,796 INFO L134 CoverageAnalysis]: Checked inductivity of 1109 backedges. 0 proven. 1109 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 23:45:21,797 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-13 23:45:21,797 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1384449740] [2024-11-13 23:45:21,797 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1384449740] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 23:45:21,797 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [409839218] [2024-11-13 23:45:21,797 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-13 23:45:21,797 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 23:45:21,797 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5af3a0f6-bdcc-40a9-9ad9-15f8df15435c/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-13 23:45:21,799 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5af3a0f6-bdcc-40a9-9ad9-15f8df15435c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 23:45:21,801 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5af3a0f6-bdcc-40a9-9ad9-15f8df15435c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-13 23:45:21,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 23:45:21,960 INFO L255 TraceCheckSpWp]: Trace formula consists of 304 conjuncts, 69 conjuncts are in the unsatisfiable core [2024-11-13 23:45:21,973 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 23:45:22,236 INFO L134 CoverageAnalysis]: Checked inductivity of 1109 backedges. 0 proven. 703 refuted. 0 times theorem prover too weak. 406 trivial. 0 not checked. [2024-11-13 23:45:22,236 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 23:45:28,555 INFO L134 CoverageAnalysis]: Checked inductivity of 1109 backedges. 0 proven. 1109 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 23:45:28,555 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [409839218] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 23:45:28,555 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1723459383] [2024-11-13 23:45:28,557 INFO L159 IcfgInterpreter]: Started Sifa with 6 locations of interest [2024-11-13 23:45:28,557 INFO L166 IcfgInterpreter]: Building call graph [2024-11-13 23:45:28,557 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-13 23:45:28,557 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-13 23:45:28,557 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-13 23:45:28,623 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-13 23:45:28,876 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2729#(<= 1 |#StackHeapBarrier|)' at error location [2024-11-13 23:45:28,876 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-13 23:45:28,876 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 23:45:28,876 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [67, 39, 68] total 136 [2024-11-13 23:45:28,877 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [825390801] [2024-11-13 23:45:28,877 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 23:45:28,877 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 137 states [2024-11-13 23:45:28,877 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-13 23:45:28,880 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 137 interpolants. [2024-11-13 23:45:28,884 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7903, Invalid=11837, Unknown=0, NotChecked=0, Total=19740 [2024-11-13 23:45:28,884 INFO L87 Difference]: Start difference. First operand 71 states and 72 transitions. Second operand has 137 states, 137 states have (on average 1.051094890510949) internal successors, (144), 136 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 23:45:29,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 23:45:29,285 INFO L93 Difference]: Finished difference Result 134 states and 166 transitions. [2024-11-13 23:45:29,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 98 states. [2024-11-13 23:45:29,286 INFO L78 Accepts]: Start accepts. Automaton has has 137 states, 137 states have (on average 1.051094890510949) internal successors, (144), 136 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 70 [2024-11-13 23:45:29,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 23:45:29,287 INFO L225 Difference]: With dead ends: 134 [2024-11-13 23:45:29,287 INFO L226 Difference]: Without dead ends: 102 [2024-11-13 23:45:29,289 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 275 GetRequests, 136 SyntacticMatches, 0 SemanticMatches, 139 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2517 ImplicationChecksByTransitivity, 8.1s TimeCoverageRelationStatistics Valid=7903, Invalid=11837, Unknown=0, NotChecked=0, Total=19740 [2024-11-13 23:45:29,289 INFO L432 NwaCegarLoop]: 2 mSDtfsCounter, 0 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 170 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 84 SdHoareTripleChecker+Invalid, 174 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 170 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-13 23:45:29,290 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 84 Invalid, 174 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 170 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-13 23:45:29,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2024-11-13 23:45:29,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 102. [2024-11-13 23:45:29,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 101 states have (on average 1.0198019801980198) internal successors, (103), 101 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 23:45:29,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 103 transitions. [2024-11-13 23:45:29,302 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 103 transitions. Word has length 70 [2024-11-13 23:45:29,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 23:45:29,302 INFO L471 AbstractCegarLoop]: Abstraction has 102 states and 103 transitions. [2024-11-13 23:45:29,302 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 137 states, 137 states have (on average 1.051094890510949) internal successors, (144), 136 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 23:45:29,302 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 103 transitions. [2024-11-13 23:45:29,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2024-11-13 23:45:29,304 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 23:45:29,304 INFO L215 NwaCegarLoop]: trace histogram [58, 38, 1, 1, 1, 1, 1] [2024-11-13 23:45:29,319 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5af3a0f6-bdcc-40a9-9ad9-15f8df15435c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-11-13 23:45:29,504 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5af3a0f6-bdcc-40a9-9ad9-15f8df15435c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 23:45:29,505 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 23:45:29,505 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 23:45:29,505 INFO L85 PathProgramCache]: Analyzing trace with hash -205155603, now seen corresponding path program 8 times [2024-11-13 23:45:29,505 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-13 23:45:29,505 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2026788029] [2024-11-13 23:45:29,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 23:45:29,505 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 23:45:29,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 23:45:40,520 INFO L134 CoverageAnalysis]: Checked inductivity of 2452 backedges. 0 proven. 2451 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-13 23:45:40,521 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-13 23:45:40,521 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2026788029] [2024-11-13 23:45:40,521 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2026788029] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 23:45:40,521 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1877787593] [2024-11-13 23:45:40,521 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-13 23:45:40,521 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 23:45:40,521 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5af3a0f6-bdcc-40a9-9ad9-15f8df15435c/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-13 23:45:40,523 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5af3a0f6-bdcc-40a9-9ad9-15f8df15435c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 23:45:40,524 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5af3a0f6-bdcc-40a9-9ad9-15f8df15435c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-11-13 23:45:40,777 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 20 check-sat command(s) [2024-11-13 23:45:40,777 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-13 23:45:40,782 INFO L255 TraceCheckSpWp]: Trace formula consists of 376 conjuncts, 40 conjuncts are in the unsatisfiable core [2024-11-13 23:45:40,796 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 23:45:43,932 INFO L134 CoverageAnalysis]: Checked inductivity of 2452 backedges. 0 proven. 741 refuted. 0 times theorem prover too weak. 1711 trivial. 0 not checked. [2024-11-13 23:45:43,932 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 23:45:49,885 INFO L134 CoverageAnalysis]: Checked inductivity of 2452 backedges. 0 proven. 741 refuted. 0 times theorem prover too weak. 1711 trivial. 0 not checked. [2024-11-13 23:45:49,886 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1877787593] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 23:45:49,886 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [28068339] [2024-11-13 23:45:49,888 INFO L159 IcfgInterpreter]: Started Sifa with 6 locations of interest [2024-11-13 23:45:49,888 INFO L166 IcfgInterpreter]: Building call graph [2024-11-13 23:45:49,888 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-13 23:45:49,888 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-13 23:45:49,889 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-13 23:45:49,954 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-13 23:45:50,333 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3970#(<= 1 |#StackHeapBarrier|)' at error location [2024-11-13 23:45:50,334 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-13 23:45:50,334 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 23:45:50,334 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [97, 40, 40] total 175 [2024-11-13 23:45:50,334 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1646517152] [2024-11-13 23:45:50,334 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 23:45:50,335 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 176 states [2024-11-13 23:45:50,335 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-13 23:45:50,339 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 176 interpolants. [2024-11-13 23:45:50,343 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10144, Invalid=22076, Unknown=0, NotChecked=0, Total=32220 [2024-11-13 23:45:50,344 INFO L87 Difference]: Start difference. First operand 102 states and 103 transitions. Second operand has 176 states, 176 states have (on average 1.0397727272727273) internal successors, (183), 175 states have internal predecessors, (183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 23:45:54,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 23:45:54,669 INFO L93 Difference]: Finished difference Result 205 states and 247 transitions. [2024-11-13 23:45:54,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 139 states. [2024-11-13 23:45:54,670 INFO L78 Accepts]: Start accepts. Automaton has has 176 states, 176 states have (on average 1.0397727272727273) internal successors, (183), 175 states have internal predecessors, (183), 0 states have call successors, (0), 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 101 [2024-11-13 23:45:54,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 23:45:54,672 INFO L225 Difference]: With dead ends: 205 [2024-11-13 23:45:54,672 INFO L226 Difference]: Without dead ends: 143 [2024-11-13 23:45:54,677 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 440 GetRequests, 220 SyntacticMatches, 1 SemanticMatches, 219 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7681 ImplicationChecksByTransitivity, 17.4s TimeCoverageRelationStatistics Valid=15843, Invalid=32777, Unknown=0, NotChecked=0, Total=48620 [2024-11-13 23:45:54,678 INFO L432 NwaCegarLoop]: 2 mSDtfsCounter, 0 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 182 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 183 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 182 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-13 23:45:54,679 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 18 Invalid, 183 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 182 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-13 23:45:54,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2024-11-13 23:45:54,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 143. [2024-11-13 23:45:54,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 143 states, 142 states have (on average 1.0140845070422535) internal successors, (144), 142 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 23:45:54,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 144 transitions. [2024-11-13 23:45:54,713 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 144 transitions. Word has length 101 [2024-11-13 23:45:54,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 23:45:54,713 INFO L471 AbstractCegarLoop]: Abstraction has 143 states and 144 transitions. [2024-11-13 23:45:54,716 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 176 states, 176 states have (on average 1.0397727272727273) internal successors, (183), 175 states have internal predecessors, (183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 23:45:54,716 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 144 transitions. [2024-11-13 23:45:54,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2024-11-13 23:45:54,721 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 23:45:54,721 INFO L215 NwaCegarLoop]: trace histogram [78, 59, 1, 1, 1, 1, 1] [2024-11-13 23:45:54,747 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5af3a0f6-bdcc-40a9-9ad9-15f8df15435c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2024-11-13 23:45:54,922 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5af3a0f6-bdcc-40a9-9ad9-15f8df15435c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2024-11-13 23:45:54,922 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 23:45:54,922 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 23:45:54,923 INFO L85 PathProgramCache]: Analyzing trace with hash 2001059645, now seen corresponding path program 9 times [2024-11-13 23:45:54,923 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-13 23:45:54,923 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1778192016] [2024-11-13 23:45:54,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 23:45:54,923 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 23:45:55,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 23:46:23,403 INFO L134 CoverageAnalysis]: Checked inductivity of 4851 backedges. 0 proven. 4851 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 23:46:23,403 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-13 23:46:23,403 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1778192016] [2024-11-13 23:46:23,404 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1778192016] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 23:46:23,404 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2016132985] [2024-11-13 23:46:23,404 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-13 23:46:23,404 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 23:46:23,404 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5af3a0f6-bdcc-40a9-9ad9-15f8df15435c/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-13 23:46:23,406 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5af3a0f6-bdcc-40a9-9ad9-15f8df15435c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 23:46:23,407 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5af3a0f6-bdcc-40a9-9ad9-15f8df15435c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-11-13 23:46:23,687 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-13 23:46:23,687 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-13 23:46:23,693 INFO L255 TraceCheckSpWp]: Trace formula consists of 603 conjuncts, 80 conjuncts are in the unsatisfiable core [2024-11-13 23:46:23,718 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 23:46:35,104 INFO L134 CoverageAnalysis]: Checked inductivity of 4851 backedges. 0 proven. 3081 refuted. 0 times theorem prover too weak. 1770 trivial. 0 not checked. [2024-11-13 23:46:35,104 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 23:46:55,123 INFO L134 CoverageAnalysis]: Checked inductivity of 4851 backedges. 0 proven. 3081 refuted. 0 times theorem prover too weak. 1770 trivial. 0 not checked. [2024-11-13 23:46:55,123 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2016132985] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 23:46:55,124 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1455623922] [2024-11-13 23:46:55,125 INFO L159 IcfgInterpreter]: Started Sifa with 6 locations of interest [2024-11-13 23:46:55,125 INFO L166 IcfgInterpreter]: Building call graph [2024-11-13 23:46:55,125 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-13 23:46:55,125 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-13 23:46:55,125 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-13 23:46:55,191 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-13 23:46:55,673 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '5885#(<= 1 |#StackHeapBarrier|)' at error location [2024-11-13 23:46:55,673 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-13 23:46:55,674 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 23:46:55,674 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [139, 80, 80] total 297 [2024-11-13 23:46:55,674 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1220097580] [2024-11-13 23:46:55,674 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 23:46:55,675 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 298 states [2024-11-13 23:46:55,675 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-13 23:46:55,683 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 298 interpolants. [2024-11-13 23:46:55,688 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31782, Invalid=59120, Unknown=0, NotChecked=0, Total=90902 [2024-11-13 23:46:55,689 INFO L87 Difference]: Start difference. First operand 143 states and 144 transitions. Second operand has 298 states, 298 states have (on average 1.0201342281879195) internal successors, (304), 297 states have internal predecessors, (304), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 23:47:09,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 23:47:09,868 INFO L93 Difference]: Finished difference Result 287 states and 369 transitions. [2024-11-13 23:47:09,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 220 states. [2024-11-13 23:47:09,870 INFO L78 Accepts]: Start accepts. Automaton has has 298 states, 298 states have (on average 1.0201342281879195) internal successors, (304), 297 states have internal predecessors, (304), 0 states have call successors, (0), 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 142 [2024-11-13 23:47:09,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 23:47:09,871 INFO L225 Difference]: With dead ends: 287 [2024-11-13 23:47:09,872 INFO L226 Difference]: Without dead ends: 224 [2024-11-13 23:47:09,877 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 643 GetRequests, 263 SyntacticMatches, 0 SemanticMatches, 380 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20221 ImplicationChecksByTransitivity, 52.1s TimeCoverageRelationStatistics Valid=49382, Invalid=96160, Unknown=0, NotChecked=0, Total=145542 [2024-11-13 23:47:09,878 INFO L432 NwaCegarLoop]: 2 mSDtfsCounter, 0 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 290 mSolverCounterSat, 568 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 858 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 568 IncrementalHoareTripleChecker+Valid, 290 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-11-13 23:47:09,878 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 26 Invalid, 858 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [568 Valid, 290 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-11-13 23:47:09,879 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 224 states. [2024-11-13 23:47:09,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 224 to 224. [2024-11-13 23:47:09,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 224 states, 223 states have (on average 1.0089686098654709) internal successors, (225), 223 states have internal predecessors, (225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 23:47:09,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 225 transitions. [2024-11-13 23:47:09,922 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 225 transitions. Word has length 142 [2024-11-13 23:47:09,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 23:47:09,923 INFO L471 AbstractCegarLoop]: Abstraction has 224 states and 225 transitions. [2024-11-13 23:47:09,923 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 298 states, 298 states have (on average 1.0201342281879195) internal successors, (304), 297 states have internal predecessors, (304), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 23:47:09,924 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 225 transitions. [2024-11-13 23:47:09,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 224 [2024-11-13 23:47:09,931 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 23:47:09,931 INFO L215 NwaCegarLoop]: trace histogram [158, 60, 1, 1, 1, 1, 1] [2024-11-13 23:47:09,950 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5af3a0f6-bdcc-40a9-9ad9-15f8df15435c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2024-11-13 23:47:10,131 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5af3a0f6-bdcc-40a9-9ad9-15f8df15435c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2024-11-13 23:47:10,131 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 23:47:10,132 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 23:47:10,132 INFO L85 PathProgramCache]: Analyzing trace with hash -1419409555, now seen corresponding path program 10 times [2024-11-13 23:47:10,132 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-13 23:47:10,132 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [57718439] [2024-11-13 23:47:10,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 23:47:10,132 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 23:47:10,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 23:48:36,945 INFO L134 CoverageAnalysis]: Checked inductivity of 14391 backedges. 0 proven. 14391 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 23:48:36,945 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-13 23:48:36,945 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [57718439] [2024-11-13 23:48:36,945 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [57718439] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 23:48:36,945 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [951446990] [2024-11-13 23:48:36,945 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-13 23:48:36,946 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 23:48:36,946 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5af3a0f6-bdcc-40a9-9ad9-15f8df15435c/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-13 23:48:36,947 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5af3a0f6-bdcc-40a9-9ad9-15f8df15435c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 23:48:36,948 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5af3a0f6-bdcc-40a9-9ad9-15f8df15435c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-11-13 23:48:37,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 23:48:37,500 INFO L255 TraceCheckSpWp]: Trace formula consists of 770 conjuncts, 160 conjuncts are in the unsatisfiable core [2024-11-13 23:48:37,539 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 23:49:16,431 INFO L134 CoverageAnalysis]: Checked inductivity of 14391 backedges. 0 proven. 12561 refuted. 0 times theorem prover too weak. 1830 trivial. 0 not checked. [2024-11-13 23:49:16,431 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 23:50:31,762 INFO L134 CoverageAnalysis]: Checked inductivity of 14391 backedges. 0 proven. 12561 refuted. 0 times theorem prover too weak. 1830 trivial. 0 not checked. [2024-11-13 23:50:31,762 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [951446990] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 23:50:31,762 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [499459093] [2024-11-13 23:50:31,764 INFO L159 IcfgInterpreter]: Started Sifa with 6 locations of interest [2024-11-13 23:50:31,764 INFO L166 IcfgInterpreter]: Building call graph [2024-11-13 23:50:31,764 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-13 23:50:31,764 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-13 23:50:31,765 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-13 23:50:31,830 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-13 23:50:32,802 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '8931#(<= 1 |#StackHeapBarrier|)' at error location [2024-11-13 23:50:32,803 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-13 23:50:32,803 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 23:50:32,803 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [220, 160, 160] total 538 [2024-11-13 23:50:32,803 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2040311263] [2024-11-13 23:50:32,803 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 23:50:32,804 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 539 states [2024-11-13 23:50:32,804 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-13 23:50:32,829 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 539 interpolants. [2024-11-13 23:50:32,838 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113202, Invalid=181104, Unknown=0, NotChecked=0, Total=294306 [2024-11-13 23:50:32,839 INFO L87 Difference]: Start difference. First operand 224 states and 225 transitions. Second operand has 539 states, 539 states have (on average 1.0111317254174397) internal successors, (545), 538 states have internal predecessors, (545), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 23:51:44,488 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 23:51:44,488 INFO L93 Difference]: Finished difference Result 449 states and 611 transitions. [2024-11-13 23:51:44,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 381 states. [2024-11-13 23:51:44,489 INFO L78 Accepts]: Start accepts. Automaton has has 539 states, 539 states have (on average 1.0111317254174397) internal successors, (545), 538 states have internal predecessors, (545), 0 states have call successors, (0), 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 223 [2024-11-13 23:51:44,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 23:51:44,492 INFO L225 Difference]: With dead ends: 449 [2024-11-13 23:51:44,492 INFO L226 Difference]: Without dead ends: 385 [2024-11-13 23:51:44,512 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 1047 GetRequests, 346 SyntacticMatches, 0 SemanticMatches, 701 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59863 ImplicationChecksByTransitivity, 189.1s TimeCoverageRelationStatistics Valid=174162, Invalid=319344, Unknown=0, NotChecked=0, Total=493506 [2024-11-13 23:51:44,512 INFO L432 NwaCegarLoop]: 2 mSDtfsCounter, 0 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 498 mSolverCounterSat, 1128 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 1626 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1128 IncrementalHoareTripleChecker+Valid, 498 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2024-11-13 23:51:44,512 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 34 Invalid, 1626 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1128 Valid, 498 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2024-11-13 23:51:44,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 385 states. [2024-11-13 23:51:44,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 385 to 385. [2024-11-13 23:51:44,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 385 states, 384 states have (on average 1.0052083333333333) internal successors, (386), 384 states have internal predecessors, (386), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 23:51:44,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 385 states to 385 states and 386 transitions. [2024-11-13 23:51:44,556 INFO L78 Accepts]: Start accepts. Automaton has 385 states and 386 transitions. Word has length 223 [2024-11-13 23:51:44,557 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 23:51:44,557 INFO L471 AbstractCegarLoop]: Abstraction has 385 states and 386 transitions. [2024-11-13 23:51:44,558 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 539 states, 539 states have (on average 1.0111317254174397) internal successors, (545), 538 states have internal predecessors, (545), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 23:51:44,558 INFO L276 IsEmpty]: Start isEmpty. Operand 385 states and 386 transitions. [2024-11-13 23:51:44,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 385 [2024-11-13 23:51:44,565 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 23:51:44,566 INFO L215 NwaCegarLoop]: trace histogram [318, 61, 1, 1, 1, 1, 1] [2024-11-13 23:51:44,595 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5af3a0f6-bdcc-40a9-9ad9-15f8df15435c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2024-11-13 23:51:44,766 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5af3a0f6-bdcc-40a9-9ad9-15f8df15435c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2024-11-13 23:51:44,766 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 23:51:44,767 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 23:51:44,767 INFO L85 PathProgramCache]: Analyzing trace with hash -335343555, now seen corresponding path program 11 times [2024-11-13 23:51:44,767 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-13 23:51:44,767 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1835776797] [2024-11-13 23:51:44,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 23:51:44,767 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 23:51:45,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat