./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/loops-crafted-1/nested_delay_notd2.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_63131d58-6340-4ec9-b5ef-10a4df7c8f70/bin/utaipan-verify-sOmjnqqW8E/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63131d58-6340-4ec9-b5ef-10a4df7c8f70/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_63131d58-6340-4ec9-b5ef-10a4df7c8f70/bin/utaipan-verify-sOmjnqqW8E/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63131d58-6340-4ec9-b5ef-10a4df7c8f70/bin/utaipan-verify-sOmjnqqW8E/config/TaipanReach.xml -i ../../sv-benchmarks/c/loops-crafted-1/nested_delay_notd2.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63131d58-6340-4ec9-b5ef-10a4df7c8f70/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_63131d58-6340-4ec9-b5ef-10a4df7c8f70/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 a8791b6973aa1a0d5421161a634fa2e6c3276aa5fd05ed6d81de7a2762aa206a --- Real Ultimate output --- This is Ultimate 0.3.0-dev-826ab2b [2024-11-14 04:36:08,285 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-14 04:36:08,375 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63131d58-6340-4ec9-b5ef-10a4df7c8f70/bin/utaipan-verify-sOmjnqqW8E/config/svcomp-Reach-32bit-Taipan_Default.epf [2024-11-14 04:36:08,380 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-14 04:36:08,380 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-14 04:36:08,403 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-14 04:36:08,404 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-14 04:36:08,404 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-14 04:36:08,404 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-14 04:36:08,404 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-14 04:36:08,404 INFO L153 SettingsManager]: * User list type=DISABLED [2024-11-14 04:36:08,405 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2024-11-14 04:36:08,405 INFO L153 SettingsManager]: * Explicit value domain=true [2024-11-14 04:36:08,405 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2024-11-14 04:36:08,406 INFO L153 SettingsManager]: * Octagon Domain=false [2024-11-14 04:36:08,406 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2024-11-14 04:36:08,406 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2024-11-14 04:36:08,406 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2024-11-14 04:36:08,406 INFO L153 SettingsManager]: * Interval Domain=false [2024-11-14 04:36:08,406 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2024-11-14 04:36:08,406 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2024-11-14 04:36:08,406 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2024-11-14 04:36:08,407 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-14 04:36:08,407 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-14 04:36:08,407 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-14 04:36:08,407 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-14 04:36:08,407 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-14 04:36:08,407 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-14 04:36:08,407 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-14 04:36:08,407 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-14 04:36:08,407 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-14 04:36:08,407 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-14 04:36:08,407 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-14 04:36:08,407 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-14 04:36:08,408 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-14 04:36:08,408 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-14 04:36:08,408 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-14 04:36:08,408 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-14 04:36:08,408 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2024-11-14 04:36:08,408 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-14 04:36:08,408 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-14 04:36:08,408 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-14 04:36:08,408 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2024-11-14 04:36:08,408 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-14 04:36:08,408 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-14 04:36:08,408 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2024-11-14 04:36:08,409 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-14 04:36:08,409 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_63131d58-6340-4ec9-b5ef-10a4df7c8f70/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 -> a8791b6973aa1a0d5421161a634fa2e6c3276aa5fd05ed6d81de7a2762aa206a [2024-11-14 04:36:08,705 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-14 04:36:08,718 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-14 04:36:08,722 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-14 04:36:08,725 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-14 04:36:08,725 INFO L274 PluginConnector]: CDTParser initialized [2024-11-14 04:36:08,728 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63131d58-6340-4ec9-b5ef-10a4df7c8f70/bin/utaipan-verify-sOmjnqqW8E/../../sv-benchmarks/c/loops-crafted-1/nested_delay_notd2.c Unable to find full path for "g++" [2024-11-14 04:36:10,734 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-14 04:36:10,972 INFO L384 CDTParser]: Found 1 translation units. [2024-11-14 04:36:10,974 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63131d58-6340-4ec9-b5ef-10a4df7c8f70/sv-benchmarks/c/loops-crafted-1/nested_delay_notd2.c [2024-11-14 04:36:10,980 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63131d58-6340-4ec9-b5ef-10a4df7c8f70/bin/utaipan-verify-sOmjnqqW8E/data/252856000/a0f1e4b42ede454d83ac334614636240/FLAGcb98e7a2a [2024-11-14 04:36:10,993 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63131d58-6340-4ec9-b5ef-10a4df7c8f70/bin/utaipan-verify-sOmjnqqW8E/data/252856000/a0f1e4b42ede454d83ac334614636240 [2024-11-14 04:36:10,996 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-14 04:36:10,997 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-14 04:36:10,998 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-14 04:36:10,998 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-14 04:36:11,002 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-14 04:36:11,003 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.11 04:36:10" (1/1) ... [2024-11-14 04:36:11,004 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5a7baa40 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 04:36:11, skipping insertion in model container [2024-11-14 04:36:11,004 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.11 04:36:10" (1/1) ... [2024-11-14 04:36:11,019 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-14 04:36:11,157 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_63131d58-6340-4ec9-b5ef-10a4df7c8f70/sv-benchmarks/c/loops-crafted-1/nested_delay_notd2.c[468,481] [2024-11-14 04:36:11,176 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-14 04:36:11,189 INFO L200 MainTranslator]: Completed pre-run [2024-11-14 04:36:11,201 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_63131d58-6340-4ec9-b5ef-10a4df7c8f70/sv-benchmarks/c/loops-crafted-1/nested_delay_notd2.c[468,481] [2024-11-14 04:36:11,210 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-14 04:36:11,226 INFO L204 MainTranslator]: Completed translation [2024-11-14 04:36:11,227 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 04:36:11 WrapperNode [2024-11-14 04:36:11,227 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-14 04:36:11,228 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-14 04:36:11,228 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-14 04:36:11,228 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-14 04:36:11,234 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 04:36:11" (1/1) ... [2024-11-14 04:36:11,241 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 04:36:11" (1/1) ... [2024-11-14 04:36:11,260 INFO L138 Inliner]: procedures = 14, calls = 9, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 60 [2024-11-14 04:36:11,260 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-14 04:36:11,262 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-14 04:36:11,263 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-14 04:36:11,263 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-14 04:36:11,270 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 04:36:11" (1/1) ... [2024-11-14 04:36:11,271 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 04:36:11" (1/1) ... [2024-11-14 04:36:11,276 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 04:36:11" (1/1) ... [2024-11-14 04:36:11,276 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 04:36:11" (1/1) ... [2024-11-14 04:36:11,283 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 04:36:11" (1/1) ... [2024-11-14 04:36:11,287 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 04:36:11" (1/1) ... [2024-11-14 04:36:11,292 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 04:36:11" (1/1) ... [2024-11-14 04:36:11,292 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 04:36:11" (1/1) ... [2024-11-14 04:36:11,294 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-14 04:36:11,294 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-14 04:36:11,295 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-14 04:36:11,295 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-14 04:36:11,300 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 04:36:11" (1/1) ... [2024-11-14 04:36:11,309 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2024-11-14 04:36:11,331 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63131d58-6340-4ec9-b5ef-10a4df7c8f70/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 04:36:11,348 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63131d58-6340-4ec9-b5ef-10a4df7c8f70/bin/utaipan-verify-sOmjnqqW8E/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2024-11-14 04:36:11,352 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63131d58-6340-4ec9-b5ef-10a4df7c8f70/bin/utaipan-verify-sOmjnqqW8E/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2024-11-14 04:36:11,380 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-14 04:36:11,381 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2024-11-14 04:36:11,381 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-14 04:36:11,381 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-14 04:36:11,455 INFO L238 CfgBuilder]: Building ICFG [2024-11-14 04:36:11,457 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-14 04:36:11,651 INFO L? ?]: Removed 13 outVars from TransFormulas that were not future-live. [2024-11-14 04:36:11,652 INFO L287 CfgBuilder]: Performing block encoding [2024-11-14 04:36:11,800 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-14 04:36:11,801 INFO L316 CfgBuilder]: Removed 2 assume(true) statements. [2024-11-14 04:36:11,801 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.11 04:36:11 BoogieIcfgContainer [2024-11-14 04:36:11,801 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-14 04:36:11,803 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-14 04:36:11,804 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-14 04:36:11,810 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-14 04:36:11,811 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.11 04:36:10" (1/3) ... [2024-11-14 04:36:11,812 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@75abc407 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.11 04:36:11, skipping insertion in model container [2024-11-14 04:36:11,813 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 04:36:11" (2/3) ... [2024-11-14 04:36:11,813 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@75abc407 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.11 04:36:11, skipping insertion in model container [2024-11-14 04:36:11,813 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.11 04:36:11" (3/3) ... [2024-11-14 04:36:11,815 INFO L112 eAbstractionObserver]: Analyzing ICFG nested_delay_notd2.c [2024-11-14 04:36:11,831 INFO L217 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-14 04:36:11,835 INFO L154 ceAbstractionStarter]: Applying trace abstraction to ICFG nested_delay_notd2.c that has 1 procedures, 8 locations, 1 initial locations, 2 loop locations, and 1 error locations. [2024-11-14 04:36:11,901 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-14 04:36:11,919 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;@26c237f0, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-14 04:36:11,920 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-11-14 04:36:11,925 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) [2024-11-14 04:36:11,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2024-11-14 04:36:11,935 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:36:11,936 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2024-11-14 04:36:11,937 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 04:36:11,942 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:36:11,943 INFO L85 PathProgramCache]: Analyzing trace with hash 110501610, now seen corresponding path program 1 times [2024-11-14 04:36:11,951 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:36:11,952 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [859998852] [2024-11-14 04:36:11,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:36:11,952 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:36:12,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:36:12,239 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 04:36:12,240 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:36:12,240 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [859998852] [2024-11-14 04:36:12,241 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [859998852] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 04:36:12,241 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-14 04:36:12,241 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-14 04:36:12,247 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1782320675] [2024-11-14 04:36:12,247 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 04:36:12,255 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-14 04:36:12,255 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 04:36:12,280 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-14 04:36:12,282 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-14 04:36:12,284 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 4 states, 4 states have (on average 1.25) internal successors, (5), 3 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) [2024-11-14 04:36:12,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:36:12,323 INFO L93 Difference]: Finished difference Result 15 states and 21 transitions. [2024-11-14 04:36:12,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-14 04:36:12,325 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.25) internal successors, (5), 3 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 [2024-11-14 04:36:12,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:36:12,331 INFO L225 Difference]: With dead ends: 15 [2024-11-14 04:36:12,332 INFO L226 Difference]: Without dead ends: 8 [2024-11-14 04:36:12,335 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-14 04:36:12,345 INFO L432 NwaCegarLoop]: 5 mSDtfsCounter, 7 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 9 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-14 04:36:12,345 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 9 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-14 04:36:12,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8 states. [2024-11-14 04:36:12,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8 to 8. [2024-11-14 04:36:12,373 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) [2024-11-14 04:36:12,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 9 transitions. [2024-11-14 04:36:12,378 INFO L78 Accepts]: Start accepts. Automaton has 8 states and 9 transitions. Word has length 5 [2024-11-14 04:36:12,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:36:12,378 INFO L471 AbstractCegarLoop]: Abstraction has 8 states and 9 transitions. [2024-11-14 04:36:12,378 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.25) internal successors, (5), 3 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) [2024-11-14 04:36:12,378 INFO L276 IsEmpty]: Start isEmpty. Operand 8 states and 9 transitions. [2024-11-14 04:36:12,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2024-11-14 04:36:12,379 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:36:12,379 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2024-11-14 04:36:12,379 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-14 04:36:12,379 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 04:36:12,380 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:36:12,380 INFO L85 PathProgramCache]: Analyzing trace with hash -869472161, now seen corresponding path program 1 times [2024-11-14 04:36:12,380 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:36:12,381 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [371539827] [2024-11-14 04:36:12,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:36:12,381 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:36:12,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:36:12,567 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 04:36:12,567 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:36:12,567 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [371539827] [2024-11-14 04:36:12,567 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [371539827] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 04:36:12,568 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1581770789] [2024-11-14 04:36:12,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:36:12,568 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:36:12,568 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63131d58-6340-4ec9-b5ef-10a4df7c8f70/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 04:36:12,570 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63131d58-6340-4ec9-b5ef-10a4df7c8f70/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 04:36:12,572 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63131d58-6340-4ec9-b5ef-10a4df7c8f70/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-14 04:36:12,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:36:12,654 INFO L255 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-11-14 04:36:12,657 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 04:36:12,748 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 04:36:12,748 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 04:36:12,809 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 04:36:12,810 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1581770789] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 04:36:12,810 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [144556379] [2024-11-14 04:36:12,838 INFO L159 IcfgInterpreter]: Started Sifa with 6 locations of interest [2024-11-14 04:36:12,839 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 04:36:12,842 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 04:36:12,848 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 04:36:12,849 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 04:36:13,507 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 04:36:14,203 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '88#(and (<= 1 |#StackHeapBarrier|) (<= 1 ~last~0) (= ~SIZE~0 20) (<= ~last~0 2147483647) (exists ((|v_ULTIMATE.start_main_~st~0#1_58| Int) (|v_ULTIMATE.start_main_#t~post6#1_34| Int) (|v_ULTIMATE.start_main_~a~0#1_46| Int) (|v_ULTIMATE.start_main_~c~0#1_56| Int) (|v_ULTIMATE.start_main_~a~0#1_47| Int) (|v_ULTIMATE.start_main_~b~0#1_40| Int)) (and (or (and (= |v_ULTIMATE.start_main_~st~0#1_58| 0) (= |v_ULTIMATE.start_main_~b~0#1_40| 3) (= 3 |v_ULTIMATE.start_main_~a~0#1_47|) (= (+ ~last~0 1) |v_ULTIMATE.start_main_~c~0#1_56|)) (and (or (not (= |v_ULTIMATE.start_main_~st~0#1_58| 0)) (not (= (+ ~last~0 1) |v_ULTIMATE.start_main_~c~0#1_56|))) (= |v_ULTIMATE.start_main_~b~0#1_40| 2) (= 2 |v_ULTIMATE.start_main_~a~0#1_47|))) (or (not (= |v_ULTIMATE.start_main_~c~0#1_56| 20)) (not (= |ULTIMATE.start_main_~a~0#1| |ULTIMATE.start_main_~b~0#1|))) (= |v_ULTIMATE.start_main_~b~0#1_40| |ULTIMATE.start_main_~b~0#1|) (<= |v_ULTIMATE.start_main_~st~0#1_58| 1) (or (and (= |v_ULTIMATE.start_main_~st~0#1_58| 0) (= (+ |v_ULTIMATE.start_main_~a~0#1_47| 1) |v_ULTIMATE.start_main_~a~0#1_46|) (= ~last~0 |v_ULTIMATE.start_main_~c~0#1_56|) (= |ULTIMATE.start_main_#t~post6#1| |v_ULTIMATE.start_main_#t~post6#1_34|) (= |ULTIMATE.start_main_~d~0#1| 0)) (and (or (not (= |v_ULTIMATE.start_main_~st~0#1_58| 0)) (not (= ~last~0 |v_ULTIMATE.start_main_~c~0#1_56|))) (or (and (= |ULTIMATE.start_main_~d~0#1| 1) (<= 20 ~last~0) (= |v_ULTIMATE.start_main_~st~0#1_58| 1)) (and (or (< ~last~0 20) (not (= |v_ULTIMATE.start_main_~st~0#1_58| 1))) (= |ULTIMATE.start_main_#t~post6#1| |v_ULTIMATE.start_main_#t~post6#1_34|) (= |ULTIMATE.start_main_~d~0#1| 0))) (= |v_ULTIMATE.start_main_~a~0#1_47| |v_ULTIMATE.start_main_~a~0#1_46|))) (<= 20 |v_ULTIMATE.start_main_~c~0#1_56|) (= |ULTIMATE.start_main_~a~0#1| |v_ULTIMATE.start_main_~a~0#1_46|))))' at error location [2024-11-14 04:36:14,204 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 04:36:14,204 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 04:36:14,204 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 9 [2024-11-14 04:36:14,205 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2050097684] [2024-11-14 04:36:14,205 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 04:36:14,206 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-11-14 04:36:14,206 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 04:36:14,207 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-11-14 04:36:14,209 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2024-11-14 04:36:14,209 INFO L87 Difference]: Start difference. First operand 8 states and 9 transitions. Second operand has 10 states, 10 states have (on average 1.3) internal successors, (13), 9 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) [2024-11-14 04:36:14,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:36:14,291 INFO L93 Difference]: Finished difference Result 18 states and 23 transitions. [2024-11-14 04:36:14,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-14 04:36:14,292 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.3) internal successors, (13), 9 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) Word has length 6 [2024-11-14 04:36:14,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:36:14,293 INFO L225 Difference]: With dead ends: 18 [2024-11-14 04:36:14,293 INFO L226 Difference]: Without dead ends: 11 [2024-11-14 04:36:14,294 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=73, Invalid=167, Unknown=0, NotChecked=0, Total=240 [2024-11-14 04:36:14,295 INFO L432 NwaCegarLoop]: 5 mSDtfsCounter, 9 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-14 04:36:14,295 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 17 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-14 04:36:14,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2024-11-14 04:36:14,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2024-11-14 04:36:14,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11 states, 10 states have (on average 1.2) internal successors, (12), 10 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:36:14,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 12 transitions. [2024-11-14 04:36:14,299 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 12 transitions. Word has length 6 [2024-11-14 04:36:14,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:36:14,299 INFO L471 AbstractCegarLoop]: Abstraction has 11 states and 12 transitions. [2024-11-14 04:36:14,299 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 1.3) internal successors, (13), 9 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) [2024-11-14 04:36:14,300 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 12 transitions. [2024-11-14 04:36:14,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2024-11-14 04:36:14,300 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:36:14,300 INFO L215 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1] [2024-11-14 04:36:14,322 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63131d58-6340-4ec9-b5ef-10a4df7c8f70/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-14 04:36:14,504 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63131d58-6340-4ec9-b5ef-10a4df7c8f70/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2024-11-14 04:36:14,505 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 04:36:14,505 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:36:14,505 INFO L85 PathProgramCache]: Analyzing trace with hash 448222250, now seen corresponding path program 2 times [2024-11-14 04:36:14,505 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:36:14,505 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1818088303] [2024-11-14 04:36:14,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:36:14,506 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:36:14,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:36:14,754 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 04:36:14,754 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:36:14,755 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1818088303] [2024-11-14 04:36:14,755 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1818088303] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 04:36:14,755 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1612059659] [2024-11-14 04:36:14,755 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-14 04:36:14,755 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:36:14,755 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63131d58-6340-4ec9-b5ef-10a4df7c8f70/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 04:36:14,759 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63131d58-6340-4ec9-b5ef-10a4df7c8f70/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 04:36:14,762 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63131d58-6340-4ec9-b5ef-10a4df7c8f70/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-14 04:36:14,835 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-11-14 04:36:14,836 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 04:36:14,837 INFO L255 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-11-14 04:36:14,838 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 04:36:14,952 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 04:36:14,954 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 04:36:15,084 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 04:36:15,084 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1612059659] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 04:36:15,084 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [248676616] [2024-11-14 04:36:15,086 INFO L159 IcfgInterpreter]: Started Sifa with 6 locations of interest [2024-11-14 04:36:15,090 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 04:36:15,090 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 04:36:15,091 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 04:36:15,091 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 04:36:15,435 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 04:36:16,120 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '207#(and (<= 1 |#StackHeapBarrier|) (<= 1 ~last~0) (= ~SIZE~0 20) (<= ~last~0 2147483647) (exists ((|v_ULTIMATE.start_main_~c~0#1_70| Int) (|v_ULTIMATE.start_main_#t~post6#1_36| Int) (|v_ULTIMATE.start_main_~a~0#1_46| Int) (|v_ULTIMATE.start_main_~a~0#1_47| Int) (|v_ULTIMATE.start_main_~b~0#1_40| Int) (|v_ULTIMATE.start_main_~st~0#1_67| Int)) (and (<= 20 |v_ULTIMATE.start_main_~c~0#1_70|) (or (and (= |v_ULTIMATE.start_main_~b~0#1_40| 2) (= 2 |v_ULTIMATE.start_main_~a~0#1_47|) (or (not (= (+ ~last~0 1) |v_ULTIMATE.start_main_~c~0#1_70|)) (not (= |v_ULTIMATE.start_main_~st~0#1_67| 0)))) (and (= |v_ULTIMATE.start_main_~b~0#1_40| 3) (= 3 |v_ULTIMATE.start_main_~a~0#1_47|) (= (+ ~last~0 1) |v_ULTIMATE.start_main_~c~0#1_70|) (= |v_ULTIMATE.start_main_~st~0#1_67| 0))) (or (and (or (not (= ~last~0 |v_ULTIMATE.start_main_~c~0#1_70|)) (not (= |v_ULTIMATE.start_main_~st~0#1_67| 0))) (or (and (= |ULTIMATE.start_main_~d~0#1| 1) (<= 20 ~last~0) (= |v_ULTIMATE.start_main_~st~0#1_67| 1)) (and (= |ULTIMATE.start_main_#t~post6#1| |v_ULTIMATE.start_main_#t~post6#1_36|) (= |ULTIMATE.start_main_~d~0#1| 0) (or (not (= |v_ULTIMATE.start_main_~st~0#1_67| 1)) (< ~last~0 20)))) (= |v_ULTIMATE.start_main_~a~0#1_47| |v_ULTIMATE.start_main_~a~0#1_46|)) (and (= (+ |v_ULTIMATE.start_main_~a~0#1_47| 1) |v_ULTIMATE.start_main_~a~0#1_46|) (= |ULTIMATE.start_main_#t~post6#1| |v_ULTIMATE.start_main_#t~post6#1_36|) (= |ULTIMATE.start_main_~d~0#1| 0) (= ~last~0 |v_ULTIMATE.start_main_~c~0#1_70|) (= |v_ULTIMATE.start_main_~st~0#1_67| 0))) (= |v_ULTIMATE.start_main_~b~0#1_40| |ULTIMATE.start_main_~b~0#1|) (<= |v_ULTIMATE.start_main_~st~0#1_67| 1) (= |ULTIMATE.start_main_~a~0#1| |v_ULTIMATE.start_main_~a~0#1_46|) (or (not (= |v_ULTIMATE.start_main_~c~0#1_70| 20)) (not (= |ULTIMATE.start_main_~a~0#1| |ULTIMATE.start_main_~b~0#1|))))))' at error location [2024-11-14 04:36:16,121 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 04:36:16,121 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 04:36:16,121 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 18 [2024-11-14 04:36:16,121 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1863863178] [2024-11-14 04:36:16,121 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 04:36:16,122 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-11-14 04:36:16,122 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 04:36:16,123 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-11-14 04:36:16,123 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=163, Invalid=343, Unknown=0, NotChecked=0, Total=506 [2024-11-14 04:36:16,123 INFO L87 Difference]: Start difference. First operand 11 states and 12 transitions. Second operand has 19 states, 19 states have (on average 1.1578947368421053) internal successors, (22), 18 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:36:16,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:36:16,318 INFO L93 Difference]: Finished difference Result 27 states and 35 transitions. [2024-11-14 04:36:16,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-11-14 04:36:16,319 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.1578947368421053) internal successors, (22), 18 states have internal predecessors, (22), 0 states have call successors, (0), 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 9 [2024-11-14 04:36:16,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:36:16,320 INFO L225 Difference]: With dead ends: 27 [2024-11-14 04:36:16,320 INFO L226 Difference]: Without dead ends: 17 [2024-11-14 04:36:16,320 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 257 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=238, Invalid=518, Unknown=0, NotChecked=0, Total=756 [2024-11-14 04:36:16,321 INFO L432 NwaCegarLoop]: 5 mSDtfsCounter, 24 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-14 04:36:16,322 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 25 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-14 04:36:16,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2024-11-14 04:36:16,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2024-11-14 04:36:16,328 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) [2024-11-14 04:36:16,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 18 transitions. [2024-11-14 04:36:16,328 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 18 transitions. Word has length 9 [2024-11-14 04:36:16,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:36:16,329 INFO L471 AbstractCegarLoop]: Abstraction has 17 states and 18 transitions. [2024-11-14 04:36:16,329 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.1578947368421053) internal successors, (22), 18 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:36:16,329 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 18 transitions. [2024-11-14 04:36:16,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2024-11-14 04:36:16,330 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:36:16,330 INFO L215 NwaCegarLoop]: trace histogram [10, 1, 1, 1, 1, 1] [2024-11-14 04:36:16,351 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63131d58-6340-4ec9-b5ef-10a4df7c8f70/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-11-14 04:36:16,531 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63131d58-6340-4ec9-b5ef-10a4df7c8f70/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2024-11-14 04:36:16,531 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 04:36:16,533 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:36:16,533 INFO L85 PathProgramCache]: Analyzing trace with hash -447973366, now seen corresponding path program 3 times [2024-11-14 04:36:16,533 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:36:16,533 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1072583795] [2024-11-14 04:36:16,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:36:16,534 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:36:16,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:36:16,928 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 04:36:16,928 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:36:16,929 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1072583795] [2024-11-14 04:36:16,929 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1072583795] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 04:36:16,929 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1889439603] [2024-11-14 04:36:16,929 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-14 04:36:16,929 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:36:16,929 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63131d58-6340-4ec9-b5ef-10a4df7c8f70/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 04:36:16,932 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63131d58-6340-4ec9-b5ef-10a4df7c8f70/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 04:36:16,934 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63131d58-6340-4ec9-b5ef-10a4df7c8f70/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-14 04:36:17,006 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-14 04:36:17,006 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 04:36:17,008 INFO L255 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 13 conjuncts are in the unsatisfiable core [2024-11-14 04:36:17,009 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 04:36:17,288 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 04:36:17,288 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 04:36:17,608 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 04:36:17,609 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1889439603] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 04:36:17,609 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [395601398] [2024-11-14 04:36:17,610 INFO L159 IcfgInterpreter]: Started Sifa with 6 locations of interest [2024-11-14 04:36:17,611 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 04:36:17,611 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 04:36:17,611 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 04:36:17,611 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 04:36:17,820 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 04:36:18,405 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '414#(and (<= 1 |#StackHeapBarrier|) (<= 1 ~last~0) (= ~SIZE~0 20) (exists ((|v_ULTIMATE.start_main_~st~0#1_82| Int) (|v_ULTIMATE.start_main_~a~0#1_46| Int) (|v_ULTIMATE.start_main_#t~post6#1_38| Int) (|v_ULTIMATE.start_main_~a~0#1_47| Int) (|v_ULTIMATE.start_main_~b~0#1_40| Int) (|v_ULTIMATE.start_main_~c~0#1_96| Int)) (and (or (and (= |ULTIMATE.start_main_#t~post6#1| |v_ULTIMATE.start_main_#t~post6#1_38|) (= (+ |v_ULTIMATE.start_main_~a~0#1_47| 1) |v_ULTIMATE.start_main_~a~0#1_46|) (= |v_ULTIMATE.start_main_~st~0#1_82| 0) (= |ULTIMATE.start_main_~d~0#1| 0) (= ~last~0 |v_ULTIMATE.start_main_~c~0#1_96|)) (and (or (and (= |ULTIMATE.start_main_~d~0#1| 1) (<= 20 ~last~0) (= |v_ULTIMATE.start_main_~st~0#1_82| 1)) (and (= |ULTIMATE.start_main_#t~post6#1| |v_ULTIMATE.start_main_#t~post6#1_38|) (or (not (= |v_ULTIMATE.start_main_~st~0#1_82| 1)) (< ~last~0 20)) (= |ULTIMATE.start_main_~d~0#1| 0))) (or (not (= ~last~0 |v_ULTIMATE.start_main_~c~0#1_96|)) (not (= |v_ULTIMATE.start_main_~st~0#1_82| 0))) (= |v_ULTIMATE.start_main_~a~0#1_47| |v_ULTIMATE.start_main_~a~0#1_46|))) (= |v_ULTIMATE.start_main_~b~0#1_40| |ULTIMATE.start_main_~b~0#1|) (or (and (or (not (= (+ ~last~0 1) |v_ULTIMATE.start_main_~c~0#1_96|)) (not (= |v_ULTIMATE.start_main_~st~0#1_82| 0))) (= |v_ULTIMATE.start_main_~b~0#1_40| 2) (= 2 |v_ULTIMATE.start_main_~a~0#1_47|)) (and (= (+ ~last~0 1) |v_ULTIMATE.start_main_~c~0#1_96|) (= |v_ULTIMATE.start_main_~b~0#1_40| 3) (= |v_ULTIMATE.start_main_~st~0#1_82| 0) (= 3 |v_ULTIMATE.start_main_~a~0#1_47|))) (= |ULTIMATE.start_main_~a~0#1| |v_ULTIMATE.start_main_~a~0#1_46|) (<= 20 |v_ULTIMATE.start_main_~c~0#1_96|) (or (not (= |v_ULTIMATE.start_main_~c~0#1_96| 20)) (not (= |ULTIMATE.start_main_~a~0#1| |ULTIMATE.start_main_~b~0#1|))) (<= |v_ULTIMATE.start_main_~st~0#1_82| 1))) (<= ~last~0 2147483647))' at error location [2024-11-14 04:36:18,405 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 04:36:18,405 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 04:36:18,406 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 34 [2024-11-14 04:36:18,406 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [348294826] [2024-11-14 04:36:18,406 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 04:36:18,406 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2024-11-14 04:36:18,407 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 04:36:18,408 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2024-11-14 04:36:18,408 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=528, Invalid=954, Unknown=0, NotChecked=0, Total=1482 [2024-11-14 04:36:18,409 INFO L87 Difference]: Start difference. First operand 17 states and 18 transitions. Second operand has 35 states, 35 states have (on average 1.1142857142857143) internal successors, (39), 34 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:36:18,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:36:18,791 INFO L93 Difference]: Finished difference Result 43 states and 55 transitions. [2024-11-14 04:36:18,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2024-11-14 04:36:18,792 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.1142857142857143) internal successors, (39), 34 states have internal predecessors, (39), 0 states have call successors, (0), 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 15 [2024-11-14 04:36:18,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:36:18,792 INFO L225 Difference]: With dead ends: 43 [2024-11-14 04:36:18,793 INFO L226 Difference]: Without dead ends: 27 [2024-11-14 04:36:18,794 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 905 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=753, Invalid=1503, Unknown=0, NotChecked=0, Total=2256 [2024-11-14 04:36:18,795 INFO L432 NwaCegarLoop]: 5 mSDtfsCounter, 16 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-14 04:36:18,795 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 21 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-14 04:36:18,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2024-11-14 04:36:18,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2024-11-14 04:36:18,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 26 states have (on average 1.0769230769230769) internal successors, (28), 26 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:36:18,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 28 transitions. [2024-11-14 04:36:18,803 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 28 transitions. Word has length 15 [2024-11-14 04:36:18,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:36:18,803 INFO L471 AbstractCegarLoop]: Abstraction has 27 states and 28 transitions. [2024-11-14 04:36:18,803 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 1.1142857142857143) internal successors, (39), 34 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:36:18,804 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 28 transitions. [2024-11-14 04:36:18,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2024-11-14 04:36:18,804 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:36:18,804 INFO L215 NwaCegarLoop]: trace histogram [20, 1, 1, 1, 1, 1] [2024-11-14 04:36:18,826 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63131d58-6340-4ec9-b5ef-10a4df7c8f70/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-11-14 04:36:19,005 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63131d58-6340-4ec9-b5ef-10a4df7c8f70/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2024-11-14 04:36:19,005 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 04:36:19,006 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:36:19,006 INFO L85 PathProgramCache]: Analyzing trace with hash 2000546090, now seen corresponding path program 4 times [2024-11-14 04:36:19,006 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:36:19,006 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1954136012] [2024-11-14 04:36:19,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:36:19,006 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:36:19,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:36:22,218 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 04:36:22,218 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:36:22,218 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1954136012] [2024-11-14 04:36:22,218 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1954136012] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 04:36:22,219 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [41885247] [2024-11-14 04:36:22,219 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-14 04:36:22,219 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:36:22,219 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63131d58-6340-4ec9-b5ef-10a4df7c8f70/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 04:36:22,221 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63131d58-6340-4ec9-b5ef-10a4df7c8f70/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 04:36:22,223 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63131d58-6340-4ec9-b5ef-10a4df7c8f70/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-14 04:36:22,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:36:22,293 WARN L253 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 77 conjuncts are in the unsatisfiable core [2024-11-14 04:36:22,298 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 04:36:25,541 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 04:36:25,541 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 04:36:31,112 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 04:36:31,112 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [41885247] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 04:36:31,112 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1328751334] [2024-11-14 04:36:31,114 INFO L159 IcfgInterpreter]: Started Sifa with 6 locations of interest [2024-11-14 04:36:31,114 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 04:36:31,114 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 04:36:31,115 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 04:36:31,115 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 04:36:31,219 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 04:36:31,770 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '776#(and (<= 1 |#StackHeapBarrier|) (<= 1 ~last~0) (exists ((|v_ULTIMATE.start_main_#t~post6#1_41| Int) (|v_ULTIMATE.start_main_~c~0#1_142| Int) (|v_ULTIMATE.start_main_~st~0#1_128| Int) (|v_ULTIMATE.start_main_~a~0#1_46| Int) (|v_ULTIMATE.start_main_~a~0#1_47| Int) (|v_ULTIMATE.start_main_~b~0#1_40| Int)) (and (or (and (or (and (= |ULTIMATE.start_main_~d~0#1| 1) (<= 20 ~last~0) (= |v_ULTIMATE.start_main_~st~0#1_128| 1)) (and (= |ULTIMATE.start_main_~d~0#1| 0) (or (not (= |v_ULTIMATE.start_main_~st~0#1_128| 1)) (< ~last~0 20)) (= |ULTIMATE.start_main_#t~post6#1| |v_ULTIMATE.start_main_#t~post6#1_41|))) (= |v_ULTIMATE.start_main_~a~0#1_47| |v_ULTIMATE.start_main_~a~0#1_46|) (or (not (= |v_ULTIMATE.start_main_~st~0#1_128| 0)) (not (= ~last~0 |v_ULTIMATE.start_main_~c~0#1_142|)))) (and (= (+ |v_ULTIMATE.start_main_~a~0#1_47| 1) |v_ULTIMATE.start_main_~a~0#1_46|) (= ~last~0 |v_ULTIMATE.start_main_~c~0#1_142|) (= |v_ULTIMATE.start_main_~st~0#1_128| 0) (= |ULTIMATE.start_main_~d~0#1| 0) (= |ULTIMATE.start_main_#t~post6#1| |v_ULTIMATE.start_main_#t~post6#1_41|))) (= |v_ULTIMATE.start_main_~b~0#1_40| |ULTIMATE.start_main_~b~0#1|) (<= 20 |v_ULTIMATE.start_main_~c~0#1_142|) (<= |v_ULTIMATE.start_main_~st~0#1_128| 1) (or (and (= |v_ULTIMATE.start_main_~b~0#1_40| 3) (= 3 |v_ULTIMATE.start_main_~a~0#1_47|) (= |v_ULTIMATE.start_main_~st~0#1_128| 0) (= |v_ULTIMATE.start_main_~c~0#1_142| (+ ~last~0 1))) (and (= |v_ULTIMATE.start_main_~b~0#1_40| 2) (= 2 |v_ULTIMATE.start_main_~a~0#1_47|) (or (not (= |v_ULTIMATE.start_main_~c~0#1_142| (+ ~last~0 1))) (not (= |v_ULTIMATE.start_main_~st~0#1_128| 0))))) (or (not (= |v_ULTIMATE.start_main_~c~0#1_142| 20)) (not (= |ULTIMATE.start_main_~a~0#1| |ULTIMATE.start_main_~b~0#1|))) (= |ULTIMATE.start_main_~a~0#1| |v_ULTIMATE.start_main_~a~0#1_46|))) (= ~SIZE~0 20) (<= ~last~0 2147483647))' at error location [2024-11-14 04:36:31,770 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 04:36:31,770 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 04:36:31,770 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24, 24] total 69 [2024-11-14 04:36:31,770 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1148210945] [2024-11-14 04:36:31,770 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 04:36:31,771 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 70 states [2024-11-14 04:36:31,771 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 04:36:31,774 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2024-11-14 04:36:31,777 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1333, Invalid=4069, Unknown=0, NotChecked=0, Total=5402 [2024-11-14 04:36:31,777 INFO L87 Difference]: Start difference. First operand 27 states and 28 transitions. Second operand has 70 states, 70 states have (on average 1.0285714285714285) internal successors, (72), 69 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) [2024-11-14 04:36:36,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:36:36,473 INFO L93 Difference]: Finished difference Result 78 states and 84 transitions. [2024-11-14 04:36:36,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2024-11-14 04:36:36,473 INFO L78 Accepts]: Start accepts. Automaton has has 70 states, 70 states have (on average 1.0285714285714285) internal successors, (72), 69 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) Word has length 25 [2024-11-14 04:36:36,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:36:36,474 INFO L225 Difference]: With dead ends: 78 [2024-11-14 04:36:36,474 INFO L226 Difference]: Without dead ends: 76 [2024-11-14 04:36:36,480 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 115 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4219 ImplicationChecksByTransitivity, 10.2s TimeCoverageRelationStatistics Valid=3483, Invalid=10089, Unknown=0, NotChecked=0, Total=13572 [2024-11-14 04:36:36,481 INFO L432 NwaCegarLoop]: 4 mSDtfsCounter, 47 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 98 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 106 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 98 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-14 04:36:36,482 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [47 Valid, 34 Invalid, 106 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 98 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-14 04:36:36,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2024-11-14 04:36:36,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 74. [2024-11-14 04:36:36,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 73 states have (on average 1.0547945205479452) internal successors, (77), 73 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:36:36,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 77 transitions. [2024-11-14 04:36:36,504 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 77 transitions. Word has length 25 [2024-11-14 04:36:36,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:36:36,504 INFO L471 AbstractCegarLoop]: Abstraction has 74 states and 77 transitions. [2024-11-14 04:36:36,504 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 70 states, 70 states have (on average 1.0285714285714285) internal successors, (72), 69 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) [2024-11-14 04:36:36,504 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 77 transitions. [2024-11-14 04:36:36,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2024-11-14 04:36:36,505 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:36:36,505 INFO L215 NwaCegarLoop]: trace histogram [41, 2, 2, 1, 1, 1, 1, 1] [2024-11-14 04:36:36,525 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63131d58-6340-4ec9-b5ef-10a4df7c8f70/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-11-14 04:36:36,705 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63131d58-6340-4ec9-b5ef-10a4df7c8f70/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:36:36,706 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 04:36:36,706 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:36:36,706 INFO L85 PathProgramCache]: Analyzing trace with hash 265806667, now seen corresponding path program 1 times [2024-11-14 04:36:36,706 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:36:36,706 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1781581495] [2024-11-14 04:36:36,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:36:36,707 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:36:36,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:36:37,472 INFO L134 CoverageAnalysis]: Checked inductivity of 905 backedges. 254 proven. 440 refuted. 0 times theorem prover too weak. 211 trivial. 0 not checked. [2024-11-14 04:36:37,472 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:36:37,472 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1781581495] [2024-11-14 04:36:37,472 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1781581495] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 04:36:37,472 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1303112518] [2024-11-14 04:36:37,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:36:37,472 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:36:37,472 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63131d58-6340-4ec9-b5ef-10a4df7c8f70/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 04:36:37,475 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63131d58-6340-4ec9-b5ef-10a4df7c8f70/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 04:36:37,477 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63131d58-6340-4ec9-b5ef-10a4df7c8f70/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-14 04:36:37,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:36:37,569 INFO L255 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 23 conjuncts are in the unsatisfiable core [2024-11-14 04:36:37,571 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 04:36:38,356 INFO L134 CoverageAnalysis]: Checked inductivity of 905 backedges. 694 proven. 0 refuted. 0 times theorem prover too weak. 211 trivial. 0 not checked. [2024-11-14 04:36:38,356 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-14 04:36:38,357 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1303112518] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 04:36:38,357 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-14 04:36:38,357 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [23] total 44 [2024-11-14 04:36:38,357 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [405158772] [2024-11-14 04:36:38,357 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 04:36:38,357 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-11-14 04:36:38,357 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 04:36:38,358 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-11-14 04:36:38,359 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=720, Invalid=1260, Unknown=0, NotChecked=0, Total=1980 [2024-11-14 04:36:38,359 INFO L87 Difference]: Start difference. First operand 74 states and 77 transitions. Second operand has 24 states, 24 states have (on average 1.2916666666666667) internal successors, (31), 23 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:36:38,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:36:38,466 INFO L93 Difference]: Finished difference Result 126 states and 132 transitions. [2024-11-14 04:36:38,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2024-11-14 04:36:38,469 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.2916666666666667) internal successors, (31), 23 states have internal predecessors, (31), 0 states have call successors, (0), 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 50 [2024-11-14 04:36:38,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:36:38,470 INFO L225 Difference]: With dead ends: 126 [2024-11-14 04:36:38,470 INFO L226 Difference]: Without dead ends: 74 [2024-11-14 04:36:38,471 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 230 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=720, Invalid=1260, Unknown=0, NotChecked=0, Total=1980 [2024-11-14 04:36:38,472 INFO L432 NwaCegarLoop]: 5 mSDtfsCounter, 2 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 83 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 83 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 83 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-14 04:36:38,474 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 25 Invalid, 83 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 83 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-14 04:36:38,475 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2024-11-14 04:36:38,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 74. [2024-11-14 04:36:38,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 73 states have (on average 1.0136986301369864) internal successors, (74), 73 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:36:38,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 74 transitions. [2024-11-14 04:36:38,505 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 74 transitions. Word has length 50 [2024-11-14 04:36:38,505 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:36:38,505 INFO L471 AbstractCegarLoop]: Abstraction has 74 states and 74 transitions. [2024-11-14 04:36:38,505 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.2916666666666667) internal successors, (31), 23 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:36:38,506 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 74 transitions. [2024-11-14 04:36:38,507 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2024-11-14 04:36:38,511 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:36:38,511 INFO L215 NwaCegarLoop]: trace histogram [60, 3, 3, 2, 2, 1, 1, 1] [2024-11-14 04:36:38,535 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63131d58-6340-4ec9-b5ef-10a4df7c8f70/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-11-14 04:36:38,711 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63131d58-6340-4ec9-b5ef-10a4df7c8f70/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:36:38,712 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 04:36:38,713 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:36:38,713 INFO L85 PathProgramCache]: Analyzing trace with hash -587692078, now seen corresponding path program 2 times [2024-11-14 04:36:38,713 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:36:38,713 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2105466971] [2024-11-14 04:36:38,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:36:38,713 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:36:38,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:36:56,004 INFO L134 CoverageAnalysis]: Checked inductivity of 1960 backedges. 0 proven. 1960 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 04:36:56,004 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:36:56,004 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2105466971] [2024-11-14 04:36:56,004 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2105466971] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 04:36:56,004 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1057657755] [2024-11-14 04:36:56,004 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-14 04:36:56,005 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:36:56,005 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63131d58-6340-4ec9-b5ef-10a4df7c8f70/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 04:36:56,009 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63131d58-6340-4ec9-b5ef-10a4df7c8f70/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 04:36:56,010 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63131d58-6340-4ec9-b5ef-10a4df7c8f70/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-14 04:36:56,154 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 23 check-sat command(s) [2024-11-14 04:36:56,154 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 04:36:56,159 INFO L255 TraceCheckSpWp]: Trace formula consists of 309 conjuncts, 148 conjuncts are in the unsatisfiable core [2024-11-14 04:36:56,168 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 04:37:05,464 INFO L134 CoverageAnalysis]: Checked inductivity of 1960 backedges. 26 proven. 1753 refuted. 0 times theorem prover too weak. 181 trivial. 0 not checked. [2024-11-14 04:37:05,464 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 04:37:29,445 INFO L134 CoverageAnalysis]: Checked inductivity of 1960 backedges. 157 proven. 1803 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 04:37:29,445 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1057657755] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 04:37:29,445 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1379315193] [2024-11-14 04:37:29,447 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2024-11-14 04:37:29,448 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 04:37:29,448 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 04:37:29,448 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 04:37:29,448 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 04:37:31,015 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 04:37:42,260 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2335#(and (<= 1 |#StackHeapBarrier|) (<= 1 ~last~0) (or (exists ((|v_ULTIMATE.start_main_~b~0#1_80| Int) (|v_ULTIMATE.start_main_~a~0#1_112| Int) (|v_ULTIMATE.start_main_~st~0#1_262| Int) (|v_ULTIMATE.start_main_~c~0#1_294| Int) (|v_ULTIMATE.start_main_~a~0#1_46| Int) (|v_ULTIMATE.start_main_#t~post6#1_49| Int) (|v_ULTIMATE.start_main_~a~0#1_47| Int) (|v_ULTIMATE.start_main_~b~0#1_40| Int) (|v_ULTIMATE.start_main_~d~0#1_54| Int)) (and (<= |v_ULTIMATE.start_main_~st~0#1_262| 1) (or (and (= |ULTIMATE.start_main_~d~0#1| |v_ULTIMATE.start_main_~d~0#1_54|) (= |ULTIMATE.start_main_#t~post6#1| |v_ULTIMATE.start_main_#t~post6#1_49|) (= (+ |v_ULTIMATE.start_main_~a~0#1_47| 1) |v_ULTIMATE.start_main_~a~0#1_46|) (= |v_ULTIMATE.start_main_~st~0#1_262| 0) (= ~last~0 |v_ULTIMATE.start_main_~c~0#1_294|)) (and (or (not (= |v_ULTIMATE.start_main_~st~0#1_262| 0)) (not (= ~last~0 |v_ULTIMATE.start_main_~c~0#1_294|))) (= |v_ULTIMATE.start_main_~a~0#1_47| |v_ULTIMATE.start_main_~a~0#1_46|) (or (and (= |ULTIMATE.start_main_~d~0#1| |v_ULTIMATE.start_main_~d~0#1_54|) (= |ULTIMATE.start_main_#t~post6#1| |v_ULTIMATE.start_main_#t~post6#1_49|) (or (< ~last~0 20) (not (= |v_ULTIMATE.start_main_~st~0#1_262| 1)))) (and (<= 20 ~last~0) (= |v_ULTIMATE.start_main_~st~0#1_262| 1) (= |ULTIMATE.start_main_~d~0#1| (+ 1 |v_ULTIMATE.start_main_~d~0#1_54|)))))) (or (and (= |ULTIMATE.start_main_~b~0#1| 1) (= |ULTIMATE.start_main_~a~0#1| 0) (= |ULTIMATE.start_main_~d~0#1| 20)) (and (= |v_ULTIMATE.start_main_~b~0#1_40| |ULTIMATE.start_main_~b~0#1|) (not (= |ULTIMATE.start_main_~d~0#1| 20)) (= |ULTIMATE.start_main_~a~0#1| |v_ULTIMATE.start_main_~a~0#1_46|))) (<= 20 |v_ULTIMATE.start_main_~c~0#1_294|) (or (not (= |v_ULTIMATE.start_main_~c~0#1_294| 20)) (not (= |ULTIMATE.start_main_~a~0#1| |ULTIMATE.start_main_~b~0#1|))) (or (and (= |v_ULTIMATE.start_main_~c~0#1_294| (+ ~last~0 1)) (= (+ |v_ULTIMATE.start_main_~a~0#1_112| 3) |v_ULTIMATE.start_main_~a~0#1_47|) (= |v_ULTIMATE.start_main_~b~0#1_40| (+ |v_ULTIMATE.start_main_~b~0#1_80| 3)) (= |v_ULTIMATE.start_main_~st~0#1_262| 0)) (and (or (not (= |v_ULTIMATE.start_main_~st~0#1_262| 0)) (not (= |v_ULTIMATE.start_main_~c~0#1_294| (+ ~last~0 1)))) (= (+ |v_ULTIMATE.start_main_~a~0#1_112| 2) |v_ULTIMATE.start_main_~a~0#1_47|) (= |v_ULTIMATE.start_main_~b~0#1_40| (+ |v_ULTIMATE.start_main_~b~0#1_80| 2)))))) (exists ((|v_ULTIMATE.start_main_#t~post6#1_48| Int) (|v_ULTIMATE.start_main_~a~0#1_46| Int) (|v_ULTIMATE.start_main_~st~0#1_258| Int) (|v_ULTIMATE.start_main_~c~0#1_290| Int) (|v_ULTIMATE.start_main_~a~0#1_47| Int) (|v_ULTIMATE.start_main_~b~0#1_40| Int)) (and (= |v_ULTIMATE.start_main_~b~0#1_40| |ULTIMATE.start_main_~b~0#1|) (= |ULTIMATE.start_main_~a~0#1| |v_ULTIMATE.start_main_~a~0#1_46|) (<= 20 |v_ULTIMATE.start_main_~c~0#1_290|) (<= |v_ULTIMATE.start_main_~st~0#1_258| 1) (or (and (= |v_ULTIMATE.start_main_~a~0#1_47| |v_ULTIMATE.start_main_~a~0#1_46|) (or (and (= |ULTIMATE.start_main_~d~0#1| 1) (<= 20 ~last~0) (= |v_ULTIMATE.start_main_~st~0#1_258| 1)) (and (= |ULTIMATE.start_main_~d~0#1| 0) (or (< ~last~0 20) (not (= |v_ULTIMATE.start_main_~st~0#1_258| 1))) (= |ULTIMATE.start_main_#t~post6#1| |v_ULTIMATE.start_main_#t~post6#1_48|))) (or (not (= |v_ULTIMATE.start_main_~st~0#1_258| 0)) (not (= ~last~0 |v_ULTIMATE.start_main_~c~0#1_290|)))) (and (= (+ |v_ULTIMATE.start_main_~a~0#1_47| 1) |v_ULTIMATE.start_main_~a~0#1_46|) (= ~last~0 |v_ULTIMATE.start_main_~c~0#1_290|) (= |ULTIMATE.start_main_~d~0#1| 0) (= |v_ULTIMATE.start_main_~st~0#1_258| 0) (= |ULTIMATE.start_main_#t~post6#1| |v_ULTIMATE.start_main_#t~post6#1_48|))) (or (not (= |v_ULTIMATE.start_main_~c~0#1_290| 20)) (not (= |ULTIMATE.start_main_~a~0#1| |ULTIMATE.start_main_~b~0#1|))) (or (and (= |v_ULTIMATE.start_main_~c~0#1_290| (+ ~last~0 1)) (= |v_ULTIMATE.start_main_~b~0#1_40| 3) (= 3 |v_ULTIMATE.start_main_~a~0#1_47|) (= |v_ULTIMATE.start_main_~st~0#1_258| 0)) (and (= |v_ULTIMATE.start_main_~b~0#1_40| 2) (= 2 |v_ULTIMATE.start_main_~a~0#1_47|) (or (not (= |v_ULTIMATE.start_main_~st~0#1_258| 0)) (not (= |v_ULTIMATE.start_main_~c~0#1_290| (+ ~last~0 1))))))))) (= ~SIZE~0 20) (<= ~last~0 2147483647))' at error location [2024-11-14 04:37:42,260 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 04:37:42,260 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 04:37:42,261 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [70, 45, 69] total 181 [2024-11-14 04:37:42,261 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2031391342] [2024-11-14 04:37:42,261 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 04:37:42,261 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 182 states [2024-11-14 04:37:42,261 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 04:37:42,265 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 182 interpolants. [2024-11-14 04:37:42,277 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7396, Invalid=27382, Unknown=4, NotChecked=0, Total=34782 [2024-11-14 04:37:42,278 INFO L87 Difference]: Start difference. First operand 74 states and 74 transitions. Second operand has 182 states, 182 states have (on average 1.065934065934066) internal successors, (194), 181 states have internal predecessors, (194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:38:18,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:38:18,439 INFO L93 Difference]: Finished difference Result 172 states and 175 transitions. [2024-11-14 04:38:18,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 113 states. [2024-11-14 04:38:18,439 INFO L78 Accepts]: Start accepts. Automaton has has 182 states, 182 states have (on average 1.065934065934066) internal successors, (194), 181 states have internal predecessors, (194), 0 states have call successors, (0), 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 73 [2024-11-14 04:38:18,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:38:18,441 INFO L225 Difference]: With dead ends: 172 [2024-11-14 04:38:18,441 INFO L226 Difference]: Without dead ends: 170 [2024-11-14 04:38:18,450 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 391 GetRequests, 98 SyntacticMatches, 4 SemanticMatches, 289 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30443 ImplicationChecksByTransitivity, 69.8s TimeCoverageRelationStatistics Valid=18829, Invalid=65557, Unknown=4, NotChecked=0, Total=84390 [2024-11-14 04:38:18,451 INFO L432 NwaCegarLoop]: 4 mSDtfsCounter, 138 mSDsluCounter, 114 mSDsCounter, 0 mSdLazyCounter, 1015 mSolverCounterSat, 69 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 138 SdHoareTripleChecker+Valid, 118 SdHoareTripleChecker+Invalid, 1084 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 69 IncrementalHoareTripleChecker+Valid, 1015 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2024-11-14 04:38:18,451 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [138 Valid, 118 Invalid, 1084 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [69 Valid, 1015 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2024-11-14 04:38:18,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2024-11-14 04:38:18,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 170. [2024-11-14 04:38:18,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 170 states, 169 states have (on average 1.0059171597633136) internal successors, (170), 169 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:38:18,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 170 transitions. [2024-11-14 04:38:18,507 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 170 transitions. Word has length 73 [2024-11-14 04:38:18,507 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:38:18,507 INFO L471 AbstractCegarLoop]: Abstraction has 170 states and 170 transitions. [2024-11-14 04:38:18,508 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 182 states, 182 states have (on average 1.065934065934066) internal successors, (194), 181 states have internal predecessors, (194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:38:18,508 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 170 transitions. [2024-11-14 04:38:18,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 170 [2024-11-14 04:38:18,512 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:38:18,512 INFO L215 NwaCegarLoop]: trace histogram [140, 7, 7, 6, 6, 1, 1, 1] [2024-11-14 04:38:18,526 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63131d58-6340-4ec9-b5ef-10a4df7c8f70/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-11-14 04:38:18,715 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63131d58-6340-4ec9-b5ef-10a4df7c8f70/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2024-11-14 04:38:18,715 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 04:38:18,716 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:38:18,716 INFO L85 PathProgramCache]: Analyzing trace with hash 1444476194, now seen corresponding path program 3 times [2024-11-14 04:38:18,716 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:38:18,716 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [301219388] [2024-11-14 04:38:18,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:38:18,716 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:38:18,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:39:03,253 INFO L134 CoverageAnalysis]: Checked inductivity of 10788 backedges. 0 proven. 10788 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 04:39:03,253 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:39:03,253 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [301219388] [2024-11-14 04:39:03,253 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [301219388] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 04:39:03,253 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [622904235] [2024-11-14 04:39:03,253 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-14 04:39:03,253 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:39:03,254 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63131d58-6340-4ec9-b5ef-10a4df7c8f70/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 04:39:03,256 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63131d58-6340-4ec9-b5ef-10a4df7c8f70/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 04:39:03,257 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63131d58-6340-4ec9-b5ef-10a4df7c8f70/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-14 04:39:03,470 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-14 04:39:03,470 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 04:39:03,480 WARN L253 TraceCheckSpWp]: Trace formula consists of 677 conjuncts, 359 conjuncts are in the unsatisfiable core [2024-11-14 04:39:03,498 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 04:39:57,650 INFO L134 CoverageAnalysis]: Checked inductivity of 10788 backedges. 0 proven. 10788 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 04:39:57,650 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 04:41:23,195 INFO L134 CoverageAnalysis]: Checked inductivity of 10788 backedges. 190 proven. 10598 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 04:41:23,195 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [622904235] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 04:41:23,196 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [344861207] [2024-11-14 04:41:23,197 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2024-11-14 04:41:23,197 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 04:41:23,197 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 04:41:23,197 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 04:41:23,198 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 04:41:24,349 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 04:41:26,355 WARN L873 $PredicateComparison]: unable to prove that (or (= 20 c_~SIZE~0) (exists ((|v_ULTIMATE.start_main_~a~0#1_167| Int) (|v_ULTIMATE.start_main_#t~post6#1_68| Int) (|v_ULTIMATE.start_main_~b~0#1_109| Int) (|v_ULTIMATE.start_main_~c~0#1_605| Int) (|v_ULTIMATE.start_main_~a~0#1_46| Int) (|v_ULTIMATE.start_main_~st~0#1_579| Int) (|v_ULTIMATE.start_main_~a~0#1_47| Int) (|v_ULTIMATE.start_main_~b~0#1_40| Int) (|v_ULTIMATE.start_main_~d~0#1_73| Int)) (let ((.cse5 (= |v_ULTIMATE.start_main_~st~0#1_579| 0))) (let ((.cse4 (not .cse5))) (and (let ((.cse3 (= |v_ULTIMATE.start_main_~c~0#1_605| c_~last~0)) (.cse1 (= |c_ULTIMATE.start_main_#t~post6#1| |v_ULTIMATE.start_main_#t~post6#1_68|)) (.cse2 (= |c_ULTIMATE.start_main_~d~0#1| |v_ULTIMATE.start_main_~d~0#1_73|))) (or (and (let ((.cse0 (= |v_ULTIMATE.start_main_~st~0#1_579| 1))) (or (and (= (+ 1 |v_ULTIMATE.start_main_~d~0#1_73|) |c_ULTIMATE.start_main_~d~0#1|) (<= c_~SIZE~0 c_~last~0) .cse0) (and (or (not .cse0) (< c_~last~0 c_~SIZE~0)) .cse1 .cse2))) (or (not .cse3) .cse4) (= |v_ULTIMATE.start_main_~a~0#1_47| |v_ULTIMATE.start_main_~a~0#1_46|)) (and .cse3 .cse5 (= (+ |v_ULTIMATE.start_main_~a~0#1_47| 1) |v_ULTIMATE.start_main_~a~0#1_46|) .cse1 .cse2))) (or (not (= |c_ULTIMATE.start_main_~a~0#1| |c_ULTIMATE.start_main_~b~0#1|)) (not (= |v_ULTIMATE.start_main_~c~0#1_605| c_~SIZE~0))) (<= c_~SIZE~0 |v_ULTIMATE.start_main_~c~0#1_605|) (let ((.cse6 (= |c_ULTIMATE.start_main_~d~0#1| c_~SIZE~0))) (or (and (= |c_ULTIMATE.start_main_~a~0#1| 0) .cse6 (= |c_ULTIMATE.start_main_~b~0#1| 1)) (and (= |v_ULTIMATE.start_main_~b~0#1_40| |c_ULTIMATE.start_main_~b~0#1|) (not .cse6) (= |c_ULTIMATE.start_main_~a~0#1| |v_ULTIMATE.start_main_~a~0#1_46|)))) (let ((.cse7 (= |v_ULTIMATE.start_main_~c~0#1_605| (+ c_~last~0 1)))) (or (and (or .cse4 (not .cse7)) (= (+ |v_ULTIMATE.start_main_~a~0#1_167| 2) |v_ULTIMATE.start_main_~a~0#1_47|) (= (+ 2 |v_ULTIMATE.start_main_~b~0#1_109|) |v_ULTIMATE.start_main_~b~0#1_40|)) (and (= |v_ULTIMATE.start_main_~a~0#1_47| (+ |v_ULTIMATE.start_main_~a~0#1_167| 3)) .cse5 .cse7 (= (+ 3 |v_ULTIMATE.start_main_~b~0#1_109|) |v_ULTIMATE.start_main_~b~0#1_40|))))))))) is different from true