./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/array-examples/standard_strcpy_original-1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 826ab2ba Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc1578cc-ba57-45bf-ba44-df2a3d70ad13/bin/utaipan-verify-sOmjnqqW8E/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc1578cc-ba57-45bf-ba44-df2a3d70ad13/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_fc1578cc-ba57-45bf-ba44-df2a3d70ad13/bin/utaipan-verify-sOmjnqqW8E/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc1578cc-ba57-45bf-ba44-df2a3d70ad13/bin/utaipan-verify-sOmjnqqW8E/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/array-examples/standard_strcpy_original-1.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc1578cc-ba57-45bf-ba44-df2a3d70ad13/bin/utaipan-verify-sOmjnqqW8E/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc1578cc-ba57-45bf-ba44-df2a3d70ad13/bin/utaipan-verify-sOmjnqqW8E --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 25419aae3fa6b25817a0bb63109cdb8dd339b767b8ddb876acb37423139730d4 --- Real Ultimate output --- This is Ultimate 0.3.0-dev-826ab2b [2024-11-14 04:14:15,942 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-14 04:14:16,018 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc1578cc-ba57-45bf-ba44-df2a3d70ad13/bin/utaipan-verify-sOmjnqqW8E/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2024-11-14 04:14:16,024 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-14 04:14:16,024 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-14 04:14:16,048 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-14 04:14:16,049 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-14 04:14:16,049 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-14 04:14:16,053 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-14 04:14:16,053 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-14 04:14:16,053 INFO L153 SettingsManager]: * User list type=DISABLED [2024-11-14 04:14:16,053 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2024-11-14 04:14:16,053 INFO L153 SettingsManager]: * Explicit value domain=true [2024-11-14 04:14:16,054 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2024-11-14 04:14:16,054 INFO L153 SettingsManager]: * Octagon Domain=false [2024-11-14 04:14:16,054 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2024-11-14 04:14:16,054 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2024-11-14 04:14:16,054 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2024-11-14 04:14:16,054 INFO L153 SettingsManager]: * Interval Domain=false [2024-11-14 04:14:16,054 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2024-11-14 04:14:16,054 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2024-11-14 04:14:16,055 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2024-11-14 04:14:16,055 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-14 04:14:16,055 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-14 04:14:16,055 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-14 04:14:16,055 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-14 04:14:16,055 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-14 04:14:16,055 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-14 04:14:16,056 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-14 04:14:16,056 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-11-14 04:14:16,056 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-11-14 04:14:16,056 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-11-14 04:14:16,056 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-14 04:14:16,056 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-11-14 04:14:16,056 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-14 04:14:16,056 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-11-14 04:14:16,056 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-14 04:14:16,057 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-14 04:14:16,058 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-14 04:14:16,058 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-14 04:14:16,059 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-14 04:14:16,059 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2024-11-14 04:14:16,059 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-14 04:14:16,059 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-14 04:14:16,059 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2024-11-14 04:14:16,059 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-14 04:14:16,059 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-14 04:14:16,059 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2024-11-14 04:14:16,059 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-14 04:14:16,059 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_fc1578cc-ba57-45bf-ba44-df2a3d70ad13/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 valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) 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 -> 25419aae3fa6b25817a0bb63109cdb8dd339b767b8ddb876acb37423139730d4 [2024-11-14 04:14:16,366 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-14 04:14:16,374 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-14 04:14:16,377 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-14 04:14:16,378 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-14 04:14:16,378 INFO L274 PluginConnector]: CDTParser initialized [2024-11-14 04:14:16,379 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc1578cc-ba57-45bf-ba44-df2a3d70ad13/bin/utaipan-verify-sOmjnqqW8E/../../sv-benchmarks/c/array-examples/standard_strcpy_original-1.i Unable to find full path for "g++" [2024-11-14 04:14:18,159 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-14 04:14:18,495 INFO L384 CDTParser]: Found 1 translation units. [2024-11-14 04:14:18,499 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc1578cc-ba57-45bf-ba44-df2a3d70ad13/sv-benchmarks/c/array-examples/standard_strcpy_original-1.i [2024-11-14 04:14:18,508 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc1578cc-ba57-45bf-ba44-df2a3d70ad13/bin/utaipan-verify-sOmjnqqW8E/data/2719f278a/e14447d7c54847498bb797dc4cee125b/FLAG41d662333 [2024-11-14 04:14:18,523 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc1578cc-ba57-45bf-ba44-df2a3d70ad13/bin/utaipan-verify-sOmjnqqW8E/data/2719f278a/e14447d7c54847498bb797dc4cee125b [2024-11-14 04:14:18,526 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-14 04:14:18,527 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-14 04:14:18,529 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-14 04:14:18,529 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-14 04:14:18,534 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-14 04:14:18,535 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.11 04:14:18" (1/1) ... [2024-11-14 04:14:18,536 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7e18c013 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 04:14:18, skipping insertion in model container [2024-11-14 04:14:18,536 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.11 04:14:18" (1/1) ... [2024-11-14 04:14:18,550 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-14 04:14:18,728 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-14 04:14:18,740 INFO L200 MainTranslator]: Completed pre-run [2024-11-14 04:14:18,762 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-14 04:14:18,781 INFO L204 MainTranslator]: Completed translation [2024-11-14 04:14:18,784 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 04:14:18 WrapperNode [2024-11-14 04:14:18,784 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-14 04:14:18,785 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-14 04:14:18,785 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-14 04:14:18,785 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-14 04:14:18,794 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 04:14:18" (1/1) ... [2024-11-14 04:14:18,801 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 04:14:18" (1/1) ... [2024-11-14 04:14:18,823 INFO L138 Inliner]: procedures = 16, calls = 21, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 63 [2024-11-14 04:14:18,824 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-14 04:14:18,824 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-14 04:14:18,824 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-14 04:14:18,825 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-14 04:14:18,832 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 04:14:18" (1/1) ... [2024-11-14 04:14:18,833 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 04:14:18" (1/1) ... [2024-11-14 04:14:18,835 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 04:14:18" (1/1) ... [2024-11-14 04:14:18,839 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 04:14:18" (1/1) ... [2024-11-14 04:14:18,846 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 04:14:18" (1/1) ... [2024-11-14 04:14:18,853 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 04:14:18" (1/1) ... [2024-11-14 04:14:18,855 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 04:14:18" (1/1) ... [2024-11-14 04:14:18,859 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 04:14:18" (1/1) ... [2024-11-14 04:14:18,861 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-14 04:14:18,862 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-14 04:14:18,862 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-14 04:14:18,862 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-14 04:14:18,863 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 04:14:18" (1/1) ... [2024-11-14 04:14:18,875 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2024-11-14 04:14:18,891 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc1578cc-ba57-45bf-ba44-df2a3d70ad13/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 04:14:18,905 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc1578cc-ba57-45bf-ba44-df2a3d70ad13/bin/utaipan-verify-sOmjnqqW8E/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2024-11-14 04:14:18,908 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc1578cc-ba57-45bf-ba44-df2a3d70ad13/bin/utaipan-verify-sOmjnqqW8E/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2024-11-14 04:14:18,935 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-14 04:14:18,935 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2024-11-14 04:14:18,935 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-11-14 04:14:18,935 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2024-11-14 04:14:18,935 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-14 04:14:18,936 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-14 04:14:18,936 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2024-11-14 04:14:18,936 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-11-14 04:14:19,019 INFO L238 CfgBuilder]: Building ICFG [2024-11-14 04:14:19,021 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-14 04:14:19,247 INFO L? ?]: Removed 40 outVars from TransFormulas that were not future-live. [2024-11-14 04:14:19,247 INFO L287 CfgBuilder]: Performing block encoding [2024-11-14 04:14:19,292 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-14 04:14:19,292 INFO L316 CfgBuilder]: Removed 3 assume(true) statements. [2024-11-14 04:14:19,292 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.11 04:14:19 BoogieIcfgContainer [2024-11-14 04:14:19,293 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-14 04:14:19,295 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-14 04:14:19,295 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-14 04:14:19,300 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-14 04:14:19,300 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.11 04:14:18" (1/3) ... [2024-11-14 04:14:19,301 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@25a925d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.11 04:14:19, skipping insertion in model container [2024-11-14 04:14:19,301 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 04:14:18" (2/3) ... [2024-11-14 04:14:19,302 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@25a925d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.11 04:14:19, skipping insertion in model container [2024-11-14 04:14:19,302 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.11 04:14:19" (3/3) ... [2024-11-14 04:14:19,303 INFO L112 eAbstractionObserver]: Analyzing ICFG standard_strcpy_original-1.i [2024-11-14 04:14:19,322 INFO L217 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-14 04:14:19,323 INFO L154 ceAbstractionStarter]: Applying trace abstraction to ICFG standard_strcpy_original-1.i that has 1 procedures, 36 locations, 1 initial locations, 3 loop locations, and 16 error locations. [2024-11-14 04:14:19,378 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-14 04:14:19,392 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=None, 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;@abf1c0a, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-14 04:14:19,393 INFO L334 AbstractCegarLoop]: Starting to check reachability of 16 error locations. [2024-11-14 04:14:19,396 INFO L276 IsEmpty]: Start isEmpty. Operand has 36 states, 19 states have (on average 2.210526315789474) internal successors, (42), 35 states have internal predecessors, (42), 0 states have call successors, (0), 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 04:14:19,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2024-11-14 04:14:19,402 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:14:19,403 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1] [2024-11-14 04:14:19,403 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 13 more)] === [2024-11-14 04:14:19,408 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:14:19,408 INFO L85 PathProgramCache]: Analyzing trace with hash 112759, now seen corresponding path program 1 times [2024-11-14 04:14:19,420 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:14:19,420 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1837656043] [2024-11-14 04:14:19,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:14:19,421 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:14:19,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:14:19,777 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 04:14:19,777 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:14:19,777 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1837656043] [2024-11-14 04:14:19,779 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1837656043] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 04:14:19,779 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-14 04:14:19,779 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-11-14 04:14:19,781 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [776999965] [2024-11-14 04:14:19,781 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 04:14:19,787 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-14 04:14:19,787 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 04:14:19,815 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-14 04:14:19,816 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-14 04:14:19,818 INFO L87 Difference]: Start difference. First operand has 36 states, 19 states have (on average 2.210526315789474) internal successors, (42), 35 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 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 04:14:19,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:14:19,914 INFO L93 Difference]: Finished difference Result 30 states and 32 transitions. [2024-11-14 04:14:19,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-14 04:14:19,917 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 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 3 [2024-11-14 04:14:19,917 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:14:19,923 INFO L225 Difference]: With dead ends: 30 [2024-11-14 04:14:19,926 INFO L226 Difference]: Without dead ends: 29 [2024-11-14 04:14:19,928 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-14 04:14:19,930 INFO L432 NwaCegarLoop]: 13 mSDtfsCounter, 22 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 13 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-14 04:14:19,931 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 13 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-14 04:14:19,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2024-11-14 04:14:19,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2024-11-14 04:14:19,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 18 states have (on average 1.7222222222222223) internal successors, (31), 28 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 04:14:19,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 31 transitions. [2024-11-14 04:14:19,970 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 31 transitions. Word has length 3 [2024-11-14 04:14:19,970 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:14:19,970 INFO L471 AbstractCegarLoop]: Abstraction has 29 states and 31 transitions. [2024-11-14 04:14:19,970 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 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 04:14:19,971 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 31 transitions. [2024-11-14 04:14:19,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2024-11-14 04:14:19,971 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:14:19,971 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1] [2024-11-14 04:14:19,971 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-14 04:14:19,972 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 13 more)] === [2024-11-14 04:14:19,972 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:14:19,972 INFO L85 PathProgramCache]: Analyzing trace with hash 112760, now seen corresponding path program 1 times [2024-11-14 04:14:19,972 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:14:19,973 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2121363069] [2024-11-14 04:14:19,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:14:19,973 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:14:19,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:14:20,261 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 04:14:20,261 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:14:20,261 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2121363069] [2024-11-14 04:14:20,261 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2121363069] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 04:14:20,261 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-14 04:14:20,262 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-11-14 04:14:20,262 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [989133797] [2024-11-14 04:14:20,262 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 04:14:20,263 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-14 04:14:20,263 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 04:14:20,264 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-14 04:14:20,264 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-14 04:14:20,264 INFO L87 Difference]: Start difference. First operand 29 states and 31 transitions. Second operand has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 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 04:14:20,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:14:20,348 INFO L93 Difference]: Finished difference Result 31 states and 33 transitions. [2024-11-14 04:14:20,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-14 04:14:20,348 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 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 3 [2024-11-14 04:14:20,348 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:14:20,349 INFO L225 Difference]: With dead ends: 31 [2024-11-14 04:14:20,349 INFO L226 Difference]: Without dead ends: 31 [2024-11-14 04:14:20,349 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-14 04:14:20,350 INFO L432 NwaCegarLoop]: 24 mSDtfsCounter, 0 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-14 04:14:20,350 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 34 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-14 04:14:20,351 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2024-11-14 04:14:20,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2024-11-14 04:14:20,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 20 states have (on average 1.65) internal successors, (33), 30 states have internal predecessors, (33), 0 states have call successors, (0), 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 04:14:20,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 33 transitions. [2024-11-14 04:14:20,356 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 33 transitions. Word has length 3 [2024-11-14 04:14:20,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:14:20,356 INFO L471 AbstractCegarLoop]: Abstraction has 31 states and 33 transitions. [2024-11-14 04:14:20,356 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 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 04:14:20,356 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 33 transitions. [2024-11-14 04:14:20,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2024-11-14 04:14:20,357 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:14:20,357 INFO L215 NwaCegarLoop]: trace histogram [2, 1, 1, 1] [2024-11-14 04:14:20,357 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-14 04:14:20,357 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 13 more)] === [2024-11-14 04:14:20,357 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:14:20,358 INFO L85 PathProgramCache]: Analyzing trace with hash 108431875, now seen corresponding path program 1 times [2024-11-14 04:14:20,358 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:14:20,358 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1273735839] [2024-11-14 04:14:20,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:14:20,358 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:14:20,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:14:20,610 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 04:14:20,610 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:14:20,611 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1273735839] [2024-11-14 04:14:20,611 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1273735839] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 04:14:20,611 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1702489842] [2024-11-14 04:14:20,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:14:20,611 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:14:20,611 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc1578cc-ba57-45bf-ba44-df2a3d70ad13/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 04:14:20,613 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc1578cc-ba57-45bf-ba44-df2a3d70ad13/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 04:14:20,617 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc1578cc-ba57-45bf-ba44-df2a3d70ad13/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-14 04:14:20,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:14:20,690 INFO L255 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 13 conjuncts are in the unsatisfiable core [2024-11-14 04:14:20,694 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 04:14:20,805 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2024-11-14 04:14:20,813 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-14 04:14:20,818 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2024-11-14 04:14:20,904 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 04:14:20,904 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 04:14:20,999 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 04:14:21,000 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1702489842] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 04:14:21,000 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1940039279] [2024-11-14 04:14:21,019 INFO L159 IcfgInterpreter]: Started Sifa with 4 locations of interest [2024-11-14 04:14:21,019 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 04:14:21,023 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 04:14:21,028 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 04:14:21,028 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 04:14:21,670 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 04:14:21,831 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '198#(and (= |ULTIMATE.start_main_~#dst~0#1.offset| 0) (<= 0 (+ 2147483648 |ULTIMATE.start_main_#t~nondet1#1|)) (<= |ULTIMATE.start_main_#t~nondet1#1| 2147483647) (exists ((|v_ULTIMATE.start_main_~#src~0#1.base_29| Int) (|v_ULTIMATE.start_main_~i~0#1_52| Int)) (and (<= 1 |#StackHeapBarrier|) (<= (select |#length| |v_ULTIMATE.start_main_~#src~0#1.base_29|) (+ (* |v_ULTIMATE.start_main_~i~0#1_52| 4) 3)) (<= 0 |v_ULTIMATE.start_main_~i~0#1_52|) (<= |v_ULTIMATE.start_main_~i~0#1_52| 99999) (<= 2 |ULTIMATE.start_main_~#dst~0#1.base|) (<= 2 |v_ULTIMATE.start_main_~#src~0#1.base_29|))))' at error location [2024-11-14 04:14:21,832 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 04:14:21,832 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 04:14:21,832 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 6 [2024-11-14 04:14:21,832 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [554887143] [2024-11-14 04:14:21,832 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 04:14:21,832 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-14 04:14:21,832 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 04:14:21,834 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-14 04:14:21,835 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2024-11-14 04:14:21,835 INFO L87 Difference]: Start difference. First operand 31 states and 33 transitions. Second operand has 8 states, 7 states have (on average 2.142857142857143) internal successors, (15), 7 states have internal predecessors, (15), 0 states have call successors, (0), 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 04:14:21,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:14:21,983 INFO L93 Difference]: Finished difference Result 35 states and 39 transitions. [2024-11-14 04:14:21,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-14 04:14:21,986 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.142857142857143) internal successors, (15), 7 states have internal predecessors, (15), 0 states have call successors, (0), 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 04:14:21,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:14:21,987 INFO L225 Difference]: With dead ends: 35 [2024-11-14 04:14:21,988 INFO L226 Difference]: Without dead ends: 35 [2024-11-14 04:14:21,988 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2024-11-14 04:14:21,990 INFO L432 NwaCegarLoop]: 16 mSDtfsCounter, 13 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 63 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-14 04:14:21,990 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 27 Invalid, 63 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 57 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-14 04:14:21,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2024-11-14 04:14:21,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2024-11-14 04:14:21,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 26 states have (on average 1.5) 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 04:14:21,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 39 transitions. [2024-11-14 04:14:21,994 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 39 transitions. Word has length 5 [2024-11-14 04:14:21,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:14:21,994 INFO L471 AbstractCegarLoop]: Abstraction has 35 states and 39 transitions. [2024-11-14 04:14:21,995 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.142857142857143) internal successors, (15), 7 states have internal predecessors, (15), 0 states have call successors, (0), 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 04:14:21,995 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 39 transitions. [2024-11-14 04:14:21,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2024-11-14 04:14:21,995 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:14:21,995 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1] [2024-11-14 04:14:22,016 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc1578cc-ba57-45bf-ba44-df2a3d70ad13/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-14 04:14:22,199 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc1578cc-ba57-45bf-ba44-df2a3d70ad13/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:14:22,199 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 13 more)] === [2024-11-14 04:14:22,200 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:14:22,200 INFO L85 PathProgramCache]: Analyzing trace with hash 1123888839, now seen corresponding path program 1 times [2024-11-14 04:14:22,200 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:14:22,200 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1688336854] [2024-11-14 04:14:22,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:14:22,200 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:14:22,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:14:22,346 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-14 04:14:22,346 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:14:22,346 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1688336854] [2024-11-14 04:14:22,346 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1688336854] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 04:14:22,347 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [822312930] [2024-11-14 04:14:22,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:14:22,348 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:14:22,348 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc1578cc-ba57-45bf-ba44-df2a3d70ad13/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 04:14:22,350 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc1578cc-ba57-45bf-ba44-df2a3d70ad13/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 04:14:22,353 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc1578cc-ba57-45bf-ba44-df2a3d70ad13/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-14 04:14:22,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:14:22,418 INFO L255 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-11-14 04:14:22,418 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 04:14:22,465 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 04:14:22,465 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 04:14:22,518 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 04:14:22,518 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [822312930] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 04:14:22,518 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1588289166] [2024-11-14 04:14:22,520 INFO L159 IcfgInterpreter]: Started Sifa with 5 locations of interest [2024-11-14 04:14:22,520 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 04:14:22,520 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 04:14:22,520 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 04:14:22,520 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 04:14:22,829 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 04:14:22,974 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '322#(and (= |ULTIMATE.start_main_~#dst~0#1.offset| 0) (<= 1 |#StackHeapBarrier|) (<= 2 |ULTIMATE.start_main_~#dst~0#1.base|) (exists ((|v_ULTIMATE.start_main_~#src~0#1.base_30| Int)) (and (<= 2 |v_ULTIMATE.start_main_~#src~0#1.base_30|) (<= (select |#length| |v_ULTIMATE.start_main_~#src~0#1.base_30|) 3))))' at error location [2024-11-14 04:14:22,975 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 04:14:22,975 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 04:14:22,975 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 4, 4] total 10 [2024-11-14 04:14:22,975 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [37500355] [2024-11-14 04:14:22,975 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 04:14:22,975 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-14 04:14:22,976 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 04:14:22,976 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-14 04:14:22,976 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2024-11-14 04:14:22,977 INFO L87 Difference]: Start difference. First operand 35 states and 39 transitions. Second operand has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 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 04:14:23,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:14:23,342 INFO L93 Difference]: Finished difference Result 152 states and 183 transitions. [2024-11-14 04:14:23,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-11-14 04:14:23,343 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2024-11-14 04:14:23,344 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:14:23,345 INFO L225 Difference]: With dead ends: 152 [2024-11-14 04:14:23,345 INFO L226 Difference]: Without dead ends: 152 [2024-11-14 04:14:23,345 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=111, Invalid=269, Unknown=0, NotChecked=0, Total=380 [2024-11-14 04:14:23,346 INFO L432 NwaCegarLoop]: 11 mSDtfsCounter, 279 mSDsluCounter, 71 mSDsCounter, 0 mSdLazyCounter, 123 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 279 SdHoareTripleChecker+Valid, 82 SdHoareTripleChecker+Invalid, 154 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 123 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-14 04:14:23,347 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [279 Valid, 82 Invalid, 154 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 123 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-14 04:14:23,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2024-11-14 04:14:23,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 40. [2024-11-14 04:14:23,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 31 states have (on average 1.3870967741935485) internal successors, (43), 39 states have internal predecessors, (43), 0 states have call successors, (0), 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 04:14:23,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 43 transitions. [2024-11-14 04:14:23,359 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 43 transitions. Word has length 7 [2024-11-14 04:14:23,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:14:23,360 INFO L471 AbstractCegarLoop]: Abstraction has 40 states and 43 transitions. [2024-11-14 04:14:23,360 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 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 04:14:23,360 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 43 transitions. [2024-11-14 04:14:23,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2024-11-14 04:14:23,361 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:14:23,362 INFO L215 NwaCegarLoop]: trace histogram [5, 4, 1, 1] [2024-11-14 04:14:23,381 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc1578cc-ba57-45bf-ba44-df2a3d70ad13/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-11-14 04:14:23,566 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc1578cc-ba57-45bf-ba44-df2a3d70ad13/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:14:23,566 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 13 more)] === [2024-11-14 04:14:23,567 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:14:23,567 INFO L85 PathProgramCache]: Analyzing trace with hash -2028046812, now seen corresponding path program 2 times [2024-11-14 04:14:23,567 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:14:23,567 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1871471823] [2024-11-14 04:14:23,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:14:23,567 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:14:23,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:14:23,901 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 04:14:23,902 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:14:23,902 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1871471823] [2024-11-14 04:14:23,902 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1871471823] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 04:14:23,902 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [934367272] [2024-11-14 04:14:23,902 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-14 04:14:23,902 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:14:23,903 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc1578cc-ba57-45bf-ba44-df2a3d70ad13/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 04:14:23,905 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc1578cc-ba57-45bf-ba44-df2a3d70ad13/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 04:14:23,906 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc1578cc-ba57-45bf-ba44-df2a3d70ad13/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-14 04:14:23,962 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-14 04:14:23,962 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 04:14:23,964 INFO L255 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 11 conjuncts are in the unsatisfiable core [2024-11-14 04:14:23,966 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 04:14:23,981 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2024-11-14 04:14:23,985 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-14 04:14:23,987 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2024-11-14 04:14:24,100 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-14 04:14:24,100 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-14 04:14:24,100 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [934367272] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 04:14:24,101 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-14 04:14:24,101 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 8 [2024-11-14 04:14:24,101 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1813757611] [2024-11-14 04:14:24,101 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 04:14:24,101 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-14 04:14:24,101 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 04:14:24,102 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-14 04:14:24,102 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-11-14 04:14:24,102 INFO L87 Difference]: Start difference. First operand 40 states and 43 transitions. Second operand has 5 states, 4 states have (on average 1.5) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:14:24,182 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:14:24,183 INFO L93 Difference]: Finished difference Result 39 states and 41 transitions. [2024-11-14 04:14:24,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-14 04:14:24,183 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 1.5) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2024-11-14 04:14:24,183 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:14:24,183 INFO L225 Difference]: With dead ends: 39 [2024-11-14 04:14:24,184 INFO L226 Difference]: Without dead ends: 39 [2024-11-14 04:14:24,184 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-11-14 04:14:24,185 INFO L432 NwaCegarLoop]: 13 mSDtfsCounter, 21 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 50 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-14 04:14:24,185 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 32 Invalid, 50 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-14 04:14:24,186 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2024-11-14 04:14:24,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2024-11-14 04:14:24,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 31 states have (on average 1.3225806451612903) internal successors, (41), 38 states have internal predecessors, (41), 0 states have call successors, (0), 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 04:14:24,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 41 transitions. [2024-11-14 04:14:24,192 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 41 transitions. Word has length 11 [2024-11-14 04:14:24,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:14:24,193 INFO L471 AbstractCegarLoop]: Abstraction has 39 states and 41 transitions. [2024-11-14 04:14:24,193 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 1.5) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:14:24,193 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 41 transitions. [2024-11-14 04:14:24,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2024-11-14 04:14:24,194 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:14:24,194 INFO L215 NwaCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1] [2024-11-14 04:14:24,213 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc1578cc-ba57-45bf-ba44-df2a3d70ad13/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-11-14 04:14:24,398 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc1578cc-ba57-45bf-ba44-df2a3d70ad13/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:14:24,398 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 13 more)] === [2024-11-14 04:14:24,398 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:14:24,399 INFO L85 PathProgramCache]: Analyzing trace with hash 536139920, now seen corresponding path program 1 times [2024-11-14 04:14:24,399 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:14:24,399 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1959663296] [2024-11-14 04:14:24,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:14:24,399 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:14:24,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:14:24,472 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2024-11-14 04:14:24,472 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:14:24,472 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1959663296] [2024-11-14 04:14:24,472 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1959663296] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 04:14:24,473 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-14 04:14:24,473 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-11-14 04:14:24,473 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1943512471] [2024-11-14 04:14:24,473 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 04:14:24,473 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-14 04:14:24,473 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 04:14:24,473 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-14 04:14:24,473 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-14 04:14:24,474 INFO L87 Difference]: Start difference. First operand 39 states and 41 transitions. Second operand has 3 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:14:24,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:14:24,505 INFO L93 Difference]: Finished difference Result 37 states and 39 transitions. [2024-11-14 04:14:24,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-14 04:14:24,505 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2024-11-14 04:14:24,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:14:24,506 INFO L225 Difference]: With dead ends: 37 [2024-11-14 04:14:24,506 INFO L226 Difference]: Without dead ends: 37 [2024-11-14 04:14:24,506 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-14 04:14:24,507 INFO L432 NwaCegarLoop]: 13 mSDtfsCounter, 15 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 13 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-14 04:14:24,507 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 13 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-14 04:14:24,508 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2024-11-14 04:14:24,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2024-11-14 04:14:24,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 31 states have (on average 1.2580645161290323) internal successors, (39), 36 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 04:14:24,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 39 transitions. [2024-11-14 04:14:24,514 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 39 transitions. Word has length 18 [2024-11-14 04:14:24,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:14:24,514 INFO L471 AbstractCegarLoop]: Abstraction has 37 states and 39 transitions. [2024-11-14 04:14:24,514 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:14:24,514 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 39 transitions. [2024-11-14 04:14:24,515 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2024-11-14 04:14:24,515 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:14:24,515 INFO L215 NwaCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1] [2024-11-14 04:14:24,515 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-11-14 04:14:24,515 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 13 more)] === [2024-11-14 04:14:24,516 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:14:24,517 INFO L85 PathProgramCache]: Analyzing trace with hash 536139921, now seen corresponding path program 1 times [2024-11-14 04:14:24,517 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:14:24,518 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [101200707] [2024-11-14 04:14:24,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:14:24,518 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:14:24,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:14:24,683 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 04:14:24,684 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:14:24,684 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [101200707] [2024-11-14 04:14:24,684 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [101200707] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 04:14:24,684 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1028237423] [2024-11-14 04:14:24,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:14:24,684 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:14:24,684 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc1578cc-ba57-45bf-ba44-df2a3d70ad13/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 04:14:24,686 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc1578cc-ba57-45bf-ba44-df2a3d70ad13/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 04:14:24,688 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc1578cc-ba57-45bf-ba44-df2a3d70ad13/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-14 04:14:24,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:14:24,764 INFO L255 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-14 04:14:24,765 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 04:14:24,809 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 04:14:24,809 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 04:14:24,966 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 04:14:24,966 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1028237423] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 04:14:24,966 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [383866622] [2024-11-14 04:14:24,968 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2024-11-14 04:14:24,968 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 04:14:24,968 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 04:14:24,968 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 04:14:24,968 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 04:14:25,213 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 04:14:25,512 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '842#(and (<= 1 |#StackHeapBarrier|) (= (select |#valid| |ULTIMATE.start_main_~#src~0#1.base|) 1) (not (= (select (select |#memory_int| |ULTIMATE.start_main_~#src~0#1.base|) 0) 0)) (= |ULTIMATE.start_main_~#src~0#1.offset| 0) (exists ((|v_ULTIMATE.start_main_~#dst~0#1.base_18| Int)) (and (<= (select |#length| |v_ULTIMATE.start_main_~#dst~0#1.base_18|) 3) (<= 2 |v_ULTIMATE.start_main_~#dst~0#1.base_18|))) (<= 2 |ULTIMATE.start_main_~#src~0#1.base|) (<= 4 (select |#length| |ULTIMATE.start_main_~#src~0#1.base|)) (= (select (select |#memory_int| |ULTIMATE.start_main_~#src~0#1.base|) 0) |ULTIMATE.start_main_#t~mem4#1|))' at error location [2024-11-14 04:14:25,513 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 04:14:25,513 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 04:14:25,513 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 16 [2024-11-14 04:14:25,513 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1476481980] [2024-11-14 04:14:25,513 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 04:14:25,513 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-11-14 04:14:25,513 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 04:14:25,514 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-11-14 04:14:25,514 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=220, Invalid=332, Unknown=0, NotChecked=0, Total=552 [2024-11-14 04:14:25,514 INFO L87 Difference]: Start difference. First operand 37 states and 39 transitions. Second operand has 17 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 16 states have internal predecessors, (35), 0 states have call successors, (0), 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 04:14:25,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:14:25,942 INFO L93 Difference]: Finished difference Result 289 states and 359 transitions. [2024-11-14 04:14:25,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-11-14 04:14:25,942 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 16 states have internal predecessors, (35), 0 states have call successors, (0), 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 18 [2024-11-14 04:14:25,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:14:25,944 INFO L225 Difference]: With dead ends: 289 [2024-11-14 04:14:25,944 INFO L226 Difference]: Without dead ends: 289 [2024-11-14 04:14:25,944 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 198 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=220, Invalid=332, Unknown=0, NotChecked=0, Total=552 [2024-11-14 04:14:25,945 INFO L432 NwaCegarLoop]: 10 mSDtfsCounter, 467 mSDsluCounter, 126 mSDsCounter, 0 mSdLazyCounter, 175 mSolverCounterSat, 134 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 467 SdHoareTripleChecker+Valid, 136 SdHoareTripleChecker+Invalid, 309 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 134 IncrementalHoareTripleChecker+Valid, 175 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-14 04:14:25,945 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [467 Valid, 136 Invalid, 309 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [134 Valid, 175 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-11-14 04:14:25,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 289 states. [2024-11-14 04:14:25,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 289 to 53. [2024-11-14 04:14:25,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 47 states have (on average 1.1702127659574468) internal successors, (55), 52 states have internal predecessors, (55), 0 states have call successors, (0), 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 04:14:25,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 55 transitions. [2024-11-14 04:14:25,956 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 55 transitions. Word has length 18 [2024-11-14 04:14:25,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:14:25,956 INFO L471 AbstractCegarLoop]: Abstraction has 53 states and 55 transitions. [2024-11-14 04:14:25,957 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 16 states have internal predecessors, (35), 0 states have call successors, (0), 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 04:14:25,960 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 55 transitions. [2024-11-14 04:14:25,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2024-11-14 04:14:25,961 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:14:25,961 INFO L215 NwaCegarLoop]: trace histogram [14, 14, 1, 1, 1, 1, 1, 1] [2024-11-14 04:14:25,980 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc1578cc-ba57-45bf-ba44-df2a3d70ad13/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-11-14 04:14:26,162 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc1578cc-ba57-45bf-ba44-df2a3d70ad13/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2024-11-14 04:14:26,162 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 13 more)] === [2024-11-14 04:14:26,162 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:14:26,162 INFO L85 PathProgramCache]: Analyzing trace with hash -317575623, now seen corresponding path program 2 times [2024-11-14 04:14:26,162 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:14:26,163 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [467933163] [2024-11-14 04:14:26,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:14:26,163 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:14:26,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:14:26,624 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 04:14:26,624 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:14:26,624 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [467933163] [2024-11-14 04:14:26,624 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [467933163] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 04:14:26,625 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1487021338] [2024-11-14 04:14:26,625 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-14 04:14:26,625 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:14:26,625 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc1578cc-ba57-45bf-ba44-df2a3d70ad13/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 04:14:26,628 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc1578cc-ba57-45bf-ba44-df2a3d70ad13/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 04:14:26,629 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc1578cc-ba57-45bf-ba44-df2a3d70ad13/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-14 04:14:26,703 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2024-11-14 04:14:26,703 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 04:14:26,704 INFO L255 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-11-14 04:14:26,705 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 04:14:26,720 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-11-14 04:14:26,918 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 196 trivial. 0 not checked. [2024-11-14 04:14:26,918 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-14 04:14:26,918 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1487021338] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 04:14:26,919 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-14 04:14:26,919 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [16] total 18 [2024-11-14 04:14:26,919 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [489196635] [2024-11-14 04:14:26,919 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 04:14:26,919 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-14 04:14:26,919 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 04:14:26,919 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-14 04:14:26,920 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=156, Invalid=186, Unknown=0, NotChecked=0, Total=342 [2024-11-14 04:14:26,920 INFO L87 Difference]: Start difference. First operand 53 states and 55 transitions. Second operand has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:14:26,979 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:14:26,979 INFO L93 Difference]: Finished difference Result 66 states and 70 transitions. [2024-11-14 04:14:26,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-14 04:14:26,980 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2024-11-14 04:14:26,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:14:26,980 INFO L225 Difference]: With dead ends: 66 [2024-11-14 04:14:26,981 INFO L226 Difference]: Without dead ends: 66 [2024-11-14 04:14:26,981 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=156, Invalid=186, Unknown=0, NotChecked=0, Total=342 [2024-11-14 04:14:26,981 INFO L432 NwaCegarLoop]: 9 mSDtfsCounter, 30 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-14 04:14:26,982 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [30 Valid, 18 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-14 04:14:26,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2024-11-14 04:14:26,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 58. [2024-11-14 04:14:26,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 52 states have (on average 1.1923076923076923) internal successors, (62), 57 states have internal predecessors, (62), 0 states have call successors, (0), 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 04:14:26,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 62 transitions. [2024-11-14 04:14:26,989 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 62 transitions. Word has length 34 [2024-11-14 04:14:26,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:14:26,989 INFO L471 AbstractCegarLoop]: Abstraction has 58 states and 62 transitions. [2024-11-14 04:14:26,989 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:14:26,990 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 62 transitions. [2024-11-14 04:14:26,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2024-11-14 04:14:26,990 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:14:26,990 INFO L215 NwaCegarLoop]: trace histogram [14, 14, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 04:14:27,012 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc1578cc-ba57-45bf-ba44-df2a3d70ad13/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-11-14 04:14:27,197 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc1578cc-ba57-45bf-ba44-df2a3d70ad13/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2024-11-14 04:14:27,197 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 13 more)] === [2024-11-14 04:14:27,197 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:14:27,198 INFO L85 PathProgramCache]: Analyzing trace with hash -1254908054, now seen corresponding path program 1 times [2024-11-14 04:14:27,198 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:14:27,198 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1414207699] [2024-11-14 04:14:27,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:14:27,198 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:14:27,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:14:27,652 INFO L134 CoverageAnalysis]: Checked inductivity of 197 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-14 04:14:27,652 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:14:27,652 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1414207699] [2024-11-14 04:14:27,652 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1414207699] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 04:14:27,652 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [686444194] [2024-11-14 04:14:27,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:14:27,653 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:14:27,653 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc1578cc-ba57-45bf-ba44-df2a3d70ad13/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 04:14:27,655 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc1578cc-ba57-45bf-ba44-df2a3d70ad13/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 04:14:27,656 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc1578cc-ba57-45bf-ba44-df2a3d70ad13/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-14 04:14:27,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:14:27,769 INFO L255 TraceCheckSpWp]: Trace formula consists of 251 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-11-14 04:14:27,771 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 04:14:27,833 INFO L134 CoverageAnalysis]: Checked inductivity of 197 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-14 04:14:27,833 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 04:14:28,302 INFO L134 CoverageAnalysis]: Checked inductivity of 197 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-14 04:14:28,302 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [686444194] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 04:14:28,302 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1199533779] [2024-11-14 04:14:28,306 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2024-11-14 04:14:28,306 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 04:14:28,306 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 04:14:28,306 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 04:14:28,306 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 04:14:28,634 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 04:14:28,852 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1670#(and (= |ULTIMATE.start_main_~#dst~0#1.offset| 0) (<= 1 |#StackHeapBarrier|) (<= 2 |ULTIMATE.start_main_~#dst~0#1.base|))' at error location [2024-11-14 04:14:28,852 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 04:14:28,852 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 04:14:28,852 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 32 [2024-11-14 04:14:28,852 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1699355217] [2024-11-14 04:14:28,852 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 04:14:28,853 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2024-11-14 04:14:28,853 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 04:14:28,855 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2024-11-14 04:14:28,855 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=542, Invalid=790, Unknown=0, NotChecked=0, Total=1332 [2024-11-14 04:14:28,856 INFO L87 Difference]: Start difference. First operand 58 states and 62 transitions. Second operand has 33 states, 33 states have (on average 2.0606060606060606) internal successors, (68), 32 states have internal predecessors, (68), 0 states have call successors, (0), 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 04:14:29,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:14:29,846 INFO L93 Difference]: Finished difference Result 593 states and 741 transitions. [2024-11-14 04:14:29,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2024-11-14 04:14:29,847 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.0606060606060606) internal successors, (68), 32 states have internal predecessors, (68), 0 states have call successors, (0), 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 35 [2024-11-14 04:14:29,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:14:29,850 INFO L225 Difference]: With dead ends: 593 [2024-11-14 04:14:29,850 INFO L226 Difference]: Without dead ends: 593 [2024-11-14 04:14:29,851 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 82 SyntacticMatches, 2 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 330 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=542, Invalid=790, Unknown=0, NotChecked=0, Total=1332 [2024-11-14 04:14:29,851 INFO L432 NwaCegarLoop]: 10 mSDtfsCounter, 1337 mSDsluCounter, 270 mSDsCounter, 0 mSdLazyCounter, 331 mSolverCounterSat, 330 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1337 SdHoareTripleChecker+Valid, 280 SdHoareTripleChecker+Invalid, 661 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 330 IncrementalHoareTripleChecker+Valid, 331 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2024-11-14 04:14:29,851 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [1337 Valid, 280 Invalid, 661 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [330 Valid, 331 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2024-11-14 04:14:29,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 593 states. [2024-11-14 04:14:29,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 593 to 90. [2024-11-14 04:14:29,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 84 states have (on average 1.119047619047619) internal successors, (94), 89 states have internal predecessors, (94), 0 states have call successors, (0), 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 04:14:29,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 94 transitions. [2024-11-14 04:14:29,873 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 94 transitions. Word has length 35 [2024-11-14 04:14:29,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:14:29,873 INFO L471 AbstractCegarLoop]: Abstraction has 90 states and 94 transitions. [2024-11-14 04:14:29,873 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 2.0606060606060606) internal successors, (68), 32 states have internal predecessors, (68), 0 states have call successors, (0), 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 04:14:29,873 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 94 transitions. [2024-11-14 04:14:29,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2024-11-14 04:14:29,876 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:14:29,876 INFO L215 NwaCegarLoop]: trace histogram [30, 30, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 04:14:29,892 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc1578cc-ba57-45bf-ba44-df2a3d70ad13/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-11-14 04:14:30,076 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc1578cc-ba57-45bf-ba44-df2a3d70ad13/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:14:30,077 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 13 more)] === [2024-11-14 04:14:30,077 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:14:30,077 INFO L85 PathProgramCache]: Analyzing trace with hash 1224822298, now seen corresponding path program 2 times [2024-11-14 04:14:30,077 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:14:30,077 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1567822072] [2024-11-14 04:14:30,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:14:30,077 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:14:30,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:14:31,351 INFO L134 CoverageAnalysis]: Checked inductivity of 901 backedges. 0 proven. 900 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-14 04:14:31,351 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:14:31,351 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1567822072] [2024-11-14 04:14:31,351 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1567822072] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 04:14:31,351 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1128157109] [2024-11-14 04:14:31,351 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-14 04:14:31,351 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:14:31,351 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc1578cc-ba57-45bf-ba44-df2a3d70ad13/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 04:14:31,353 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc1578cc-ba57-45bf-ba44-df2a3d70ad13/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 04:14:31,354 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc1578cc-ba57-45bf-ba44-df2a3d70ad13/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-14 04:14:31,442 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-14 04:14:31,443 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 04:14:31,444 INFO L255 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-11-14 04:14:31,446 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 04:14:31,659 INFO L134 CoverageAnalysis]: Checked inductivity of 901 backedges. 30 proven. 1 refuted. 0 times theorem prover too weak. 870 trivial. 0 not checked. [2024-11-14 04:14:31,659 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 04:14:31,833 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2024-11-14 04:14:31,957 INFO L134 CoverageAnalysis]: Checked inductivity of 901 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 870 trivial. 0 not checked. [2024-11-14 04:14:31,957 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1128157109] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 04:14:31,957 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1861429083] [2024-11-14 04:14:31,959 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2024-11-14 04:14:31,959 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 04:14:31,959 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 04:14:31,959 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 04:14:31,959 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 04:14:32,299 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 04:14:32,655 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2794#(and (= |ULTIMATE.start_main_~#dst~0#1.offset| 0) (<= 1 |#StackHeapBarrier|) (<= 2 |ULTIMATE.start_main_~#dst~0#1.base|))' at error location [2024-11-14 04:14:32,655 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 04:14:32,655 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 04:14:32,655 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 4, 4] total 40 [2024-11-14 04:14:32,656 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [660735420] [2024-11-14 04:14:32,659 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 04:14:32,659 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2024-11-14 04:14:32,659 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 04:14:32,660 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2024-11-14 04:14:32,661 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=675, Invalid=1305, Unknown=0, NotChecked=0, Total=1980 [2024-11-14 04:14:32,662 INFO L87 Difference]: Start difference. First operand 90 states and 94 transitions. Second operand has 41 states, 41 states have (on average 2.1219512195121952) internal successors, (87), 40 states have internal predecessors, (87), 0 states have call successors, (0), 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 04:14:35,963 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:14:35,963 INFO L93 Difference]: Finished difference Result 646 states and 799 transitions. [2024-11-14 04:14:35,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 102 states. [2024-11-14 04:14:35,964 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 2.1219512195121952) internal successors, (87), 40 states have internal predecessors, (87), 0 states have call successors, (0), 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 67 [2024-11-14 04:14:35,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:14:35,968 INFO L225 Difference]: With dead ends: 646 [2024-11-14 04:14:35,969 INFO L226 Difference]: Without dead ends: 646 [2024-11-14 04:14:35,975 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 296 GetRequests, 186 SyntacticMatches, 2 SemanticMatches, 108 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2962 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=3800, Invalid=8190, Unknown=0, NotChecked=0, Total=11990 [2024-11-14 04:14:35,976 INFO L432 NwaCegarLoop]: 17 mSDtfsCounter, 3895 mSDsluCounter, 265 mSDsCounter, 0 mSdLazyCounter, 436 mSolverCounterSat, 551 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3895 SdHoareTripleChecker+Valid, 282 SdHoareTripleChecker+Invalid, 987 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 551 IncrementalHoareTripleChecker+Valid, 436 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2024-11-14 04:14:35,977 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [3895 Valid, 282 Invalid, 987 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [551 Valid, 436 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2024-11-14 04:14:35,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 646 states. [2024-11-14 04:14:35,994 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 646 to 121. [2024-11-14 04:14:35,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 115 states have (on average 1.191304347826087) internal successors, (137), 120 states have internal predecessors, (137), 0 states have call successors, (0), 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 04:14:35,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 137 transitions. [2024-11-14 04:14:35,999 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 137 transitions. Word has length 67 [2024-11-14 04:14:35,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:14:35,999 INFO L471 AbstractCegarLoop]: Abstraction has 121 states and 137 transitions. [2024-11-14 04:14:35,999 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 2.1219512195121952) internal successors, (87), 40 states have internal predecessors, (87), 0 states have call successors, (0), 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 04:14:35,999 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 137 transitions. [2024-11-14 04:14:36,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2024-11-14 04:14:36,001 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:14:36,001 INFO L215 NwaCegarLoop]: trace histogram [31, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 04:14:36,024 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc1578cc-ba57-45bf-ba44-df2a3d70ad13/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-11-14 04:14:36,202 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc1578cc-ba57-45bf-ba44-df2a3d70ad13/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:14:36,202 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 13 more)] === [2024-11-14 04:14:36,202 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:14:36,202 INFO L85 PathProgramCache]: Analyzing trace with hash -327117896, now seen corresponding path program 1 times [2024-11-14 04:14:36,202 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:14:36,203 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1726642905] [2024-11-14 04:14:36,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:14:36,203 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:14:36,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:14:37,376 INFO L134 CoverageAnalysis]: Checked inductivity of 961 backedges. 0 proven. 961 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 04:14:37,377 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:14:37,377 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1726642905] [2024-11-14 04:14:37,377 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1726642905] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 04:14:37,377 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1800354057] [2024-11-14 04:14:37,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:14:37,377 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:14:37,377 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc1578cc-ba57-45bf-ba44-df2a3d70ad13/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 04:14:37,379 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc1578cc-ba57-45bf-ba44-df2a3d70ad13/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 04:14:37,382 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc1578cc-ba57-45bf-ba44-df2a3d70ad13/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-14 04:14:37,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:14:37,540 INFO L255 TraceCheckSpWp]: Trace formula consists of 474 conjuncts, 33 conjuncts are in the unsatisfiable core [2024-11-14 04:14:37,542 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 04:14:37,681 INFO L134 CoverageAnalysis]: Checked inductivity of 961 backedges. 0 proven. 961 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 04:14:37,681 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 04:14:39,055 INFO L134 CoverageAnalysis]: Checked inductivity of 961 backedges. 0 proven. 961 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 04:14:39,055 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1800354057] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 04:14:39,056 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [201373339] [2024-11-14 04:14:39,057 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2024-11-14 04:14:39,057 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 04:14:39,058 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 04:14:39,058 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 04:14:39,058 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 04:14:39,237 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 04:14:39,475 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '4182#(and (<= 1 |#StackHeapBarrier|) (= |ULTIMATE.start_main_~i~0#1| 0) (exists ((|v_ULTIMATE.start_main_old_#valid#1_10| (Array Int Int))) (not (= |v_ULTIMATE.start_main_old_#valid#1_10| |#valid|))) (exists ((|v_#valid_45| (Array Int Int)) (|v_ULTIMATE.start_main_~#src~0#1.base_33| Int) (|v_ULTIMATE.start_main_~#dst~0#1.base_19| Int)) (and (= (select (select |#memory_int| |v_ULTIMATE.start_main_~#src~0#1.base_33|) 0) 0) (<= 2 |v_ULTIMATE.start_main_~#dst~0#1.base_19|) (<= 2 |v_ULTIMATE.start_main_~#src~0#1.base_33|) (= |#valid| (store (store |v_#valid_45| |v_ULTIMATE.start_main_~#src~0#1.base_33| 0) |v_ULTIMATE.start_main_~#dst~0#1.base_19| 0)) (<= 4 (select |#length| |v_ULTIMATE.start_main_~#src~0#1.base_33|)) (= (select |v_#valid_45| |v_ULTIMATE.start_main_~#src~0#1.base_33|) 1))) (= |ULTIMATE.start_main_#res#1| 0))' at error location [2024-11-14 04:14:39,475 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 04:14:39,475 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 04:14:39,475 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33, 33] total 66 [2024-11-14 04:14:39,476 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1679236060] [2024-11-14 04:14:39,476 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 04:14:39,476 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 67 states [2024-11-14 04:14:39,476 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 04:14:39,478 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2024-11-14 04:14:39,479 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2560, Invalid=2842, Unknown=0, NotChecked=0, Total=5402 [2024-11-14 04:14:39,479 INFO L87 Difference]: Start difference. First operand 121 states and 137 transitions. Second operand has 67 states, 67 states have (on average 2.0597014925373136) internal successors, (138), 66 states have internal predecessors, (138), 0 states have call successors, (0), 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 04:14:43,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:14:43,025 INFO L93 Difference]: Finished difference Result 1258 states and 1581 transitions. [2024-11-14 04:14:43,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2024-11-14 04:14:43,026 INFO L78 Accepts]: Start accepts. Automaton has has 67 states, 67 states have (on average 2.0597014925373136) internal successors, (138), 66 states have internal predecessors, (138), 0 states have call successors, (0), 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 71 [2024-11-14 04:14:43,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:14:43,031 INFO L225 Difference]: With dead ends: 1258 [2024-11-14 04:14:43,031 INFO L226 Difference]: Without dead ends: 1258 [2024-11-14 04:14:43,032 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 244 GetRequests, 171 SyntacticMatches, 1 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1085 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=2560, Invalid=2842, Unknown=0, NotChecked=0, Total=5402 [2024-11-14 04:14:43,033 INFO L432 NwaCegarLoop]: 10 mSDtfsCounter, 3752 mSDsluCounter, 585 mSDsCounter, 0 mSdLazyCounter, 685 mSolverCounterSat, 694 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3752 SdHoareTripleChecker+Valid, 595 SdHoareTripleChecker+Invalid, 1379 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 694 IncrementalHoareTripleChecker+Valid, 685 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2024-11-14 04:14:43,033 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [3752 Valid, 595 Invalid, 1379 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [694 Valid, 685 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2024-11-14 04:14:43,034 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1258 states. [2024-11-14 04:14:43,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1258 to 187. [2024-11-14 04:14:43,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 187 states, 181 states have (on average 1.1215469613259668) internal successors, (203), 186 states have internal predecessors, (203), 0 states have call successors, (0), 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 04:14:43,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 203 transitions. [2024-11-14 04:14:43,051 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 203 transitions. Word has length 71 [2024-11-14 04:14:43,051 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:14:43,051 INFO L471 AbstractCegarLoop]: Abstraction has 187 states and 203 transitions. [2024-11-14 04:14:43,052 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 67 states, 67 states have (on average 2.0597014925373136) internal successors, (138), 66 states have internal predecessors, (138), 0 states have call successors, (0), 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 04:14:43,052 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 203 transitions. [2024-11-14 04:14:43,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2024-11-14 04:14:43,054 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:14:43,054 INFO L215 NwaCegarLoop]: trace histogram [64, 64, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 04:14:43,068 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc1578cc-ba57-45bf-ba44-df2a3d70ad13/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-11-14 04:14:43,256 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc1578cc-ba57-45bf-ba44-df2a3d70ad13/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:14:43,257 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 13 more)] === [2024-11-14 04:14:43,257 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:14:43,257 INFO L85 PathProgramCache]: Analyzing trace with hash -2129042141, now seen corresponding path program 2 times [2024-11-14 04:14:43,257 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:14:43,257 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1822445827] [2024-11-14 04:14:43,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:14:43,257 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:14:43,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:14:47,168 INFO L134 CoverageAnalysis]: Checked inductivity of 4096 backedges. 0 proven. 4096 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 04:14:47,169 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:14:47,169 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1822445827] [2024-11-14 04:14:47,169 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1822445827] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 04:14:47,169 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [977694881] [2024-11-14 04:14:47,169 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-14 04:14:47,169 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:14:47,169 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc1578cc-ba57-45bf-ba44-df2a3d70ad13/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 04:14:47,171 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc1578cc-ba57-45bf-ba44-df2a3d70ad13/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 04:14:47,172 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc1578cc-ba57-45bf-ba44-df2a3d70ad13/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-11-14 04:14:47,303 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2024-11-14 04:14:47,303 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 04:14:47,304 INFO L255 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-11-14 04:14:47,308 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 04:14:48,285 WARN L873 $PredicateComparison]: unable to prove that (exists ((|v_ULTIMATE.start_main_~#dst~0#1.base_20| Int) (|v_ULTIMATE.start_main_~#src~0#1.base_34| Int) (v_DerPreprocessor_2 Int) (v_DerPreprocessor_1 Int)) (and (= |c_#valid| (store (store |c_ULTIMATE.start_main_old_#valid#1| |v_ULTIMATE.start_main_~#src~0#1.base_34| 0) |v_ULTIMATE.start_main_~#dst~0#1.base_20| 0)) (= (select (store (store |c_ULTIMATE.start_main_old_#valid#1| |v_ULTIMATE.start_main_~#src~0#1.base_34| v_DerPreprocessor_1) |v_ULTIMATE.start_main_~#dst~0#1.base_20| v_DerPreprocessor_2) |v_ULTIMATE.start_main_~#src~0#1.base_34|) v_DerPreprocessor_1) (= (select |c_ULTIMATE.start_main_old_#valid#1| |v_ULTIMATE.start_main_~#dst~0#1.base_20|) 0) (= (select |c_ULTIMATE.start_main_old_#valid#1| |v_ULTIMATE.start_main_~#src~0#1.base_34|) 0))) is different from true [2024-11-14 04:14:48,288 INFO L134 CoverageAnalysis]: Checked inductivity of 4096 backedges. 64 proven. 0 refuted. 0 times theorem prover too weak. 4032 trivial. 0 not checked. [2024-11-14 04:14:48,288 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-14 04:14:48,288 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [977694881] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 04:14:48,288 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-14 04:14:48,288 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [66] total 69 [2024-11-14 04:14:48,289 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2060370314] [2024-11-14 04:14:48,289 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 04:14:48,289 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-14 04:14:48,289 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 04:14:48,289 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-14 04:14:48,290 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2219, Invalid=2476, Unknown=1, NotChecked=134, Total=4830 [2024-11-14 04:14:48,291 INFO L87 Difference]: Start difference. First operand 187 states and 203 transitions. Second operand has 5 states, 4 states have (on average 3.0) internal successors, (12), 4 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 04:14:48,395 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:14:48,396 INFO L93 Difference]: Finished difference Result 186 states and 202 transitions. [2024-11-14 04:14:48,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-14 04:14:48,396 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.0) internal successors, (12), 4 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) Word has length 137 [2024-11-14 04:14:48,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:14:48,398 INFO L225 Difference]: With dead ends: 186 [2024-11-14 04:14:48,398 INFO L226 Difference]: Without dead ends: 184 [2024-11-14 04:14:48,401 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 203 GetRequests, 134 SyntacticMatches, 1 SemanticMatches, 68 ConstructedPredicates, 1 IntricatePredicates, 1 DeprecatedPredicates, 129 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=2219, Invalid=2476, Unknown=1, NotChecked=134, Total=4830 [2024-11-14 04:14:48,402 INFO L432 NwaCegarLoop]: 10 mSDtfsCounter, 11 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 10 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 24 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-14 04:14:48,403 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 10 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 20 Invalid, 0 Unknown, 24 Unchecked, 0.0s Time] [2024-11-14 04:14:48,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2024-11-14 04:14:48,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 184. [2024-11-14 04:14:48,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 184 states, 179 states have (on average 1.094972067039106) internal successors, (196), 183 states have internal predecessors, (196), 0 states have call successors, (0), 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 04:14:48,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 196 transitions. [2024-11-14 04:14:48,414 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 196 transitions. Word has length 137 [2024-11-14 04:14:48,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:14:48,414 INFO L471 AbstractCegarLoop]: Abstraction has 184 states and 196 transitions. [2024-11-14 04:14:48,414 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.0) internal successors, (12), 4 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 04:14:48,414 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 196 transitions. [2024-11-14 04:14:48,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2024-11-14 04:14:48,416 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:14:48,416 INFO L215 NwaCegarLoop]: trace histogram [64, 64, 2, 2, 2, 1, 1, 1, 1] [2024-11-14 04:14:48,432 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc1578cc-ba57-45bf-ba44-df2a3d70ad13/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2024-11-14 04:14:48,620 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc1578cc-ba57-45bf-ba44-df2a3d70ad13/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:14:48,620 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 13 more)] === [2024-11-14 04:14:48,620 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:14:48,620 INFO L85 PathProgramCache]: Analyzing trace with hash -47301100, now seen corresponding path program 1 times [2024-11-14 04:14:48,620 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:14:48,621 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1524204469] [2024-11-14 04:14:48,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:14:48,621 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:14:48,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:14:52,588 INFO L134 CoverageAnalysis]: Checked inductivity of 4100 backedges. 0 proven. 4096 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-14 04:14:52,589 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:14:52,589 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1524204469] [2024-11-14 04:14:52,589 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1524204469] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 04:14:52,590 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [563680079] [2024-11-14 04:14:52,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:14:52,590 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:14:52,590 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc1578cc-ba57-45bf-ba44-df2a3d70ad13/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 04:14:52,593 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc1578cc-ba57-45bf-ba44-df2a3d70ad13/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 04:14:52,597 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc1578cc-ba57-45bf-ba44-df2a3d70ad13/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-11-14 04:14:52,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:14:52,857 INFO L255 TraceCheckSpWp]: Trace formula consists of 914 conjuncts, 66 conjuncts are in the unsatisfiable core [2024-11-14 04:14:52,860 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 04:14:53,066 INFO L134 CoverageAnalysis]: Checked inductivity of 4100 backedges. 0 proven. 4096 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-14 04:14:53,066 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 04:14:58,355 INFO L134 CoverageAnalysis]: Checked inductivity of 4100 backedges. 0 proven. 4096 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-14 04:14:58,356 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [563680079] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 04:14:58,356 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1798133572] [2024-11-14 04:14:58,357 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2024-11-14 04:14:58,358 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 04:14:58,358 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 04:14:58,358 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 04:14:58,358 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 04:14:58,645 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 04:14:59,295 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '7438#(and (= (select |#valid| |ULTIMATE.start_main_~#src~0#1.base|) 1) (exists ((|v_ULTIMATE.start_main_~#dst~0#1.offset_19| Int) (|v_ULTIMATE.start_main_~#dst~0#1.base_21| Int) (|v_ULTIMATE.start_main_~i~0#1_372| Int)) (and (<= 1 |#StackHeapBarrier|) (= |ULTIMATE.start_main_~#src~0#1.offset| 0) (<= (select |#length| |v_ULTIMATE.start_main_~#dst~0#1.base_21|) (+ (* |v_ULTIMATE.start_main_~i~0#1_372| 4) 3)) (<= 0 |v_ULTIMATE.start_main_~i~0#1_372|) (= |v_ULTIMATE.start_main_~#dst~0#1.offset_19| 0) (= |ULTIMATE.start_main_#t~mem4#1| (select (select |#memory_int| |ULTIMATE.start_main_~#src~0#1.base|) (* |v_ULTIMATE.start_main_~i~0#1_372| 4))) (<= 2 |ULTIMATE.start_main_~#src~0#1.base|) (<= 2 |v_ULTIMATE.start_main_~#dst~0#1.base_21|) (<= (+ (* |v_ULTIMATE.start_main_~i~0#1_372| 4) 4) (select |#length| |ULTIMATE.start_main_~#src~0#1.base|)))))' at error location [2024-11-14 04:14:59,295 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 04:14:59,295 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 04:14:59,296 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [66, 66, 66] total 132 [2024-11-14 04:14:59,296 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1259142764] [2024-11-14 04:14:59,296 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 04:14:59,296 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 133 states [2024-11-14 04:14:59,296 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 04:14:59,298 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 133 interpolants. [2024-11-14 04:14:59,301 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8789, Invalid=9843, Unknown=0, NotChecked=0, Total=18632 [2024-11-14 04:14:59,301 INFO L87 Difference]: Start difference. First operand 184 states and 196 transitions. Second operand has 133 states, 133 states have (on average 2.0150375939849625) internal successors, (268), 132 states have internal predecessors, (268), 0 states have call successors, (0), 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 04:15:22,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:15:22,750 INFO L93 Difference]: Finished difference Result 2119 states and 2769 transitions. [2024-11-14 04:15:22,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 132 states. [2024-11-14 04:15:22,751 INFO L78 Accepts]: Start accepts. Automaton has has 133 states, 133 states have (on average 2.0150375939849625) internal successors, (268), 132 states have internal predecessors, (268), 0 states have call successors, (0), 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 138 [2024-11-14 04:15:22,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:15:22,757 INFO L225 Difference]: With dead ends: 2119 [2024-11-14 04:15:22,757 INFO L226 Difference]: Without dead ends: 2119 [2024-11-14 04:15:22,760 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 478 GetRequests, 339 SyntacticMatches, 4 SemanticMatches, 135 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1826 ImplicationChecksByTransitivity, 7.9s TimeCoverageRelationStatistics Valid=8789, Invalid=9843, Unknown=0, NotChecked=0, Total=18632 [2024-11-14 04:15:22,760 INFO L432 NwaCegarLoop]: 7 mSDtfsCounter, 5966 mSDsluCounter, 780 mSDsCounter, 0 mSdLazyCounter, 1339 mSolverCounterSat, 1646 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5966 SdHoareTripleChecker+Valid, 787 SdHoareTripleChecker+Invalid, 2985 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1646 IncrementalHoareTripleChecker+Valid, 1339 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2024-11-14 04:15:22,761 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [5966 Valid, 787 Invalid, 2985 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1646 Valid, 1339 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2024-11-14 04:15:22,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2119 states. [2024-11-14 04:15:22,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2119 to 316. [2024-11-14 04:15:22,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 316 states, 311 states have (on average 1.0546623794212218) internal successors, (328), 315 states have internal predecessors, (328), 0 states have call successors, (0), 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 04:15:22,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 316 states to 316 states and 328 transitions. [2024-11-14 04:15:22,781 INFO L78 Accepts]: Start accepts. Automaton has 316 states and 328 transitions. Word has length 138 [2024-11-14 04:15:22,781 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:15:22,781 INFO L471 AbstractCegarLoop]: Abstraction has 316 states and 328 transitions. [2024-11-14 04:15:22,782 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 133 states, 133 states have (on average 2.0150375939849625) internal successors, (268), 132 states have internal predecessors, (268), 0 states have call successors, (0), 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 04:15:22,782 INFO L276 IsEmpty]: Start isEmpty. Operand 316 states and 328 transitions. [2024-11-14 04:15:22,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 271 [2024-11-14 04:15:22,785 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:15:22,785 INFO L215 NwaCegarLoop]: trace histogram [130, 130, 2, 2, 2, 1, 1, 1, 1] [2024-11-14 04:15:22,808 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc1578cc-ba57-45bf-ba44-df2a3d70ad13/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2024-11-14 04:15:22,985 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc1578cc-ba57-45bf-ba44-df2a3d70ad13/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2024-11-14 04:15:22,986 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 13 more)] === [2024-11-14 04:15:22,986 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:15:22,986 INFO L85 PathProgramCache]: Analyzing trace with hash -870034882, now seen corresponding path program 2 times [2024-11-14 04:15:22,986 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:15:22,986 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1833375846] [2024-11-14 04:15:22,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:15:22,986 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:15:23,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:15:35,253 INFO L134 CoverageAnalysis]: Checked inductivity of 16904 backedges. 0 proven. 16900 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-14 04:15:35,253 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:15:35,253 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1833375846] [2024-11-14 04:15:35,254 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1833375846] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 04:15:35,254 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [945259140] [2024-11-14 04:15:35,254 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-14 04:15:35,254 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:15:35,254 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc1578cc-ba57-45bf-ba44-df2a3d70ad13/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 04:15:35,256 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc1578cc-ba57-45bf-ba44-df2a3d70ad13/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 04:15:35,257 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc1578cc-ba57-45bf-ba44-df2a3d70ad13/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-11-14 04:15:35,473 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2024-11-14 04:15:35,473 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 04:15:35,474 INFO L255 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-11-14 04:15:35,480 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 04:15:35,491 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2024-11-14 04:15:35,505 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2024-11-14 04:15:38,326 INFO L134 CoverageAnalysis]: Checked inductivity of 16904 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 16901 trivial. 0 not checked. [2024-11-14 04:15:38,326 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 04:15:43,469 INFO L134 CoverageAnalysis]: Checked inductivity of 16904 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 16901 trivial. 0 not checked. [2024-11-14 04:15:43,469 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [945259140] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 04:15:43,469 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1956158188] [2024-11-14 04:15:43,471 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2024-11-14 04:15:43,471 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 04:15:43,471 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 04:15:43,471 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 04:15:43,471 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 04:15:43,717 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 04:15:44,820 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '11628#(and (= (select |#valid| |ULTIMATE.start_main_~#src~0#1.base|) 1) (exists ((|v_ULTIMATE.start_main_~#dst~0#1.offset_20| Int) (|v_ULTIMATE.start_main_~#dst~0#1.base_22| Int) (|v_ULTIMATE.start_main_~i~0#1_513| Int)) (and (<= 1 |#StackHeapBarrier|) (= |ULTIMATE.start_main_~#src~0#1.offset| 0) (<= 2 |v_ULTIMATE.start_main_~#dst~0#1.base_22|) (<= 2 |ULTIMATE.start_main_~#src~0#1.base|) (= |ULTIMATE.start_main_#t~mem4#1| (select (select |#memory_int| |ULTIMATE.start_main_~#src~0#1.base|) (* |v_ULTIMATE.start_main_~i~0#1_513| 4))) (<= 0 |v_ULTIMATE.start_main_~i~0#1_513|) (= |v_ULTIMATE.start_main_~#dst~0#1.offset_20| 0) (<= (+ (* |v_ULTIMATE.start_main_~i~0#1_513| 4) 4) (select |#length| |ULTIMATE.start_main_~#src~0#1.base|)) (<= (select |#length| |v_ULTIMATE.start_main_~#dst~0#1.base_22|) (+ 3 (* |v_ULTIMATE.start_main_~i~0#1_513| 4))))))' at error location [2024-11-14 04:15:44,820 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 04:15:44,821 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 04:15:44,821 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [132, 2, 2] total 136 [2024-11-14 04:15:44,821 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [773811447] [2024-11-14 04:15:44,821 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 04:15:44,822 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 137 states [2024-11-14 04:15:44,822 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 04:15:44,825 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 137 interpolants. [2024-11-14 04:15:44,826 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8798, Invalid=10942, Unknown=0, NotChecked=0, Total=19740 [2024-11-14 04:15:44,826 INFO L87 Difference]: Start difference. First operand 316 states and 328 transitions. Second operand has 137 states, 137 states have (on average 2.124087591240876) internal successors, (291), 136 states have internal predecessors, (291), 0 states have call successors, (0), 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 04:15:46,862 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-14 04:16:05,544 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-14 04:16:48,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:16:48,233 INFO L93 Difference]: Finished difference Result 2138 states and 2534 transitions. [2024-11-14 04:16:48,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 267 states. [2024-11-14 04:16:48,234 INFO L78 Accepts]: Start accepts. Automaton has has 137 states, 137 states have (on average 2.124087591240876) internal successors, (291), 136 states have internal predecessors, (291), 0 states have call successors, (0), 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 270 [2024-11-14 04:16:48,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:16:48,241 INFO L225 Difference]: With dead ends: 2138 [2024-11-14 04:16:48,241 INFO L226 Difference]: Without dead ends: 2138 [2024-11-14 04:16:48,255 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 1204 GetRequests, 797 SyntacticMatches, 4 SemanticMatches, 403 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36695 ImplicationChecksByTransitivity, 45.6s TimeCoverageRelationStatistics Valid=53612, Invalid=110008, Unknown=0, NotChecked=0, Total=163620 [2024-11-14 04:16:48,256 INFO L432 NwaCegarLoop]: 7 mSDtfsCounter, 10599 mSDsluCounter, 786 mSDsCounter, 0 mSdLazyCounter, 1355 mSolverCounterSat, 3173 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10599 SdHoareTripleChecker+Valid, 793 SdHoareTripleChecker+Invalid, 4530 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 3173 IncrementalHoareTripleChecker+Valid, 1355 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.9s IncrementalHoareTripleChecker+Time [2024-11-14 04:16:48,256 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [10599 Valid, 793 Invalid, 4530 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [3173 Valid, 1355 Invalid, 2 Unknown, 0 Unchecked, 7.9s Time] [2024-11-14 04:16:48,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2138 states. [2024-11-14 04:16:48,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2138 to 313. [2024-11-14 04:16:48,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 313 states, 310 states have (on average 1.0354838709677419) internal successors, (321), 312 states have internal predecessors, (321), 0 states have call successors, (0), 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 04:16:48,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 313 states to 313 states and 321 transitions. [2024-11-14 04:16:48,277 INFO L78 Accepts]: Start accepts. Automaton has 313 states and 321 transitions. Word has length 270 [2024-11-14 04:16:48,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:16:48,278 INFO L471 AbstractCegarLoop]: Abstraction has 313 states and 321 transitions. [2024-11-14 04:16:48,278 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 137 states, 137 states have (on average 2.124087591240876) internal successors, (291), 136 states have internal predecessors, (291), 0 states have call successors, (0), 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 04:16:48,278 INFO L276 IsEmpty]: Start isEmpty. Operand 313 states and 321 transitions. [2024-11-14 04:16:48,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 275 [2024-11-14 04:16:48,282 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:16:48,282 INFO L215 NwaCegarLoop]: trace histogram [131, 131, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 04:16:48,305 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc1578cc-ba57-45bf-ba44-df2a3d70ad13/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2024-11-14 04:16:48,487 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc1578cc-ba57-45bf-ba44-df2a3d70ad13/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2024-11-14 04:16:48,487 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 13 more)] === [2024-11-14 04:16:48,487 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:16:48,487 INFO L85 PathProgramCache]: Analyzing trace with hash 1506043410, now seen corresponding path program 1 times [2024-11-14 04:16:48,488 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:16:48,488 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1598138715] [2024-11-14 04:16:48,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:16:48,488 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:16:48,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:17:03,211 INFO L134 CoverageAnalysis]: Checked inductivity of 17161 backedges. 0 proven. 17161 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 04:17:03,211 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:17:03,211 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1598138715] [2024-11-14 04:17:03,211 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1598138715] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 04:17:03,211 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [587735616] [2024-11-14 04:17:03,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:17:03,211 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:17:03,211 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc1578cc-ba57-45bf-ba44-df2a3d70ad13/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 04:17:03,213 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc1578cc-ba57-45bf-ba44-df2a3d70ad13/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 04:17:03,214 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc1578cc-ba57-45bf-ba44-df2a3d70ad13/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-11-14 04:17:03,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:17:03,683 INFO L255 TraceCheckSpWp]: Trace formula consists of 1781 conjuncts, 133 conjuncts are in the unsatisfiable core [2024-11-14 04:17:03,688 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 04:17:04,072 INFO L134 CoverageAnalysis]: Checked inductivity of 17161 backedges. 0 proven. 17161 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 04:17:04,072 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 04:17:28,076 INFO L134 CoverageAnalysis]: Checked inductivity of 17161 backedges. 0 proven. 17161 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 04:17:28,076 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [587735616] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 04:17:28,076 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1583867607] [2024-11-14 04:17:28,078 INFO L159 IcfgInterpreter]: Started Sifa with 14 locations of interest [2024-11-14 04:17:28,078 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 04:17:28,078 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 04:17:28,078 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 04:17:28,078 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 04:17:28,245 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 04:17:28,669 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSifa [1583867607] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 04:17:28,669 INFO L185 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2024-11-14 04:17:28,669 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [133, 133, 133] total 272 [2024-11-14 04:17:28,670 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1876095961] [2024-11-14 04:17:28,670 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 04:17:28,670 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-14 04:17:28,670 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 04:17:28,671 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-14 04:17:28,675 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36593, Invalid=37663, Unknown=0, NotChecked=0, Total=74256 [2024-11-14 04:17:28,675 INFO L87 Difference]: Start difference. First operand 313 states and 321 transitions. Second operand has 8 states, 8 states have (on average 1.75) internal successors, (14), 7 states have internal predecessors, (14), 0 states have call successors, (0), 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 04:17:28,802 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:17:28,802 INFO L93 Difference]: Finished difference Result 325 states and 332 transitions. [2024-11-14 04:17:28,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-14 04:17:28,803 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 1.75) internal successors, (14), 7 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 274 [2024-11-14 04:17:28,803 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:17:28,804 INFO L225 Difference]: With dead ends: 325 [2024-11-14 04:17:28,804 INFO L226 Difference]: Without dead ends: 322 [2024-11-14 04:17:28,808 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 954 GetRequests, 682 SyntacticMatches, 0 SemanticMatches, 272 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3428 ImplicationChecksByTransitivity, 32.5s TimeCoverageRelationStatistics Valid=36863, Invalid=37939, Unknown=0, NotChecked=0, Total=74802 [2024-11-14 04:17:28,809 INFO L432 NwaCegarLoop]: 5 mSDtfsCounter, 23 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 68 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 74 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 68 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-14 04:17:28,809 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 23 Invalid, 74 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 68 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-14 04:17:28,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 322 states. [2024-11-14 04:17:28,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 322 to 313. [2024-11-14 04:17:28,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 313 states, 310 states have (on average 1.032258064516129) internal successors, (320), 312 states have internal predecessors, (320), 0 states have call successors, (0), 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 04:17:28,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 313 states to 313 states and 320 transitions. [2024-11-14 04:17:28,816 INFO L78 Accepts]: Start accepts. Automaton has 313 states and 320 transitions. Word has length 274 [2024-11-14 04:17:28,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:17:28,817 INFO L471 AbstractCegarLoop]: Abstraction has 313 states and 320 transitions. [2024-11-14 04:17:28,817 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 1.75) internal successors, (14), 7 states have internal predecessors, (14), 0 states have call successors, (0), 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 04:17:28,817 INFO L276 IsEmpty]: Start isEmpty. Operand 313 states and 320 transitions. [2024-11-14 04:17:28,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 279 [2024-11-14 04:17:28,821 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:17:28,821 INFO L215 NwaCegarLoop]: trace histogram [131, 131, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 04:17:28,848 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc1578cc-ba57-45bf-ba44-df2a3d70ad13/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2024-11-14 04:17:29,022 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc1578cc-ba57-45bf-ba44-df2a3d70ad13/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2024-11-14 04:17:29,022 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 13 more)] === [2024-11-14 04:17:29,023 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:17:29,023 INFO L85 PathProgramCache]: Analyzing trace with hash -180201773, now seen corresponding path program 1 times [2024-11-14 04:17:29,023 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:17:29,023 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1651767319] [2024-11-14 04:17:29,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:17:29,023 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:17:29,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:17:41,532 INFO L134 CoverageAnalysis]: Checked inductivity of 17163 backedges. 0 proven. 17161 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-14 04:17:41,532 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:17:41,532 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1651767319] [2024-11-14 04:17:41,532 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1651767319] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 04:17:41,532 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [275974606] [2024-11-14 04:17:41,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:17:41,532 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:17:41,533 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc1578cc-ba57-45bf-ba44-df2a3d70ad13/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 04:17:41,535 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc1578cc-ba57-45bf-ba44-df2a3d70ad13/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 04:17:41,537 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc1578cc-ba57-45bf-ba44-df2a3d70ad13/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-11-14 04:17:42,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:17:42,041 INFO L255 TraceCheckSpWp]: Trace formula consists of 1804 conjuncts, 133 conjuncts are in the unsatisfiable core [2024-11-14 04:17:42,046 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 04:17:42,616 INFO L134 CoverageAnalysis]: Checked inductivity of 17163 backedges. 0 proven. 17161 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-14 04:17:42,616 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 04:18:06,177 INFO L134 CoverageAnalysis]: Checked inductivity of 17163 backedges. 0 proven. 17161 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-14 04:18:06,177 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [275974606] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 04:18:06,177 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1632046141] [2024-11-14 04:18:06,179 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2024-11-14 04:18:06,179 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 04:18:06,180 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 04:18:06,180 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 04:18:06,180 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 04:18:06,415 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 04:18:07,610 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '19091#(and (not (= (select (select |#memory_int| |ULTIMATE.start_main_~#src~0#1.base|) |ULTIMATE.start_main_~#src~0#1.offset|) 0)) (= |ULTIMATE.start_main_~i~0#1| 0) (= (select |#valid| |ULTIMATE.start_main_~#dst~0#1.base|) 1) (= (select |#valid| |ULTIMATE.start_main_~#src~0#1.base|) 1) (not (= (select (select |#memory_int| |ULTIMATE.start_main_~#src~0#1.base|) |ULTIMATE.start_main_~#src~0#1.offset|) (select (select |#memory_int| |ULTIMATE.start_main_~#dst~0#1.base|) |ULTIMATE.start_main_~#dst~0#1.offset|))) (<= (+ |ULTIMATE.start_main_~#dst~0#1.offset| 4) (select |#length| |ULTIMATE.start_main_~#dst~0#1.base|)) (<= (+ |ULTIMATE.start_main_~#src~0#1.offset| 4) (select |#length| |ULTIMATE.start_main_~#src~0#1.base|)) (exists ((|v_ULTIMATE.start_main_~i~0#1_1056| Int)) (and (= |ULTIMATE.start_main_~#dst~0#1.offset| 0) (<= 1 |#StackHeapBarrier|) (= |ULTIMATE.start_main_~#src~0#1.offset| 0) (<= 2 |ULTIMATE.start_main_~#src~0#1.base|) (<= 2 |ULTIMATE.start_main_~#dst~0#1.base|) (<= 0 |v_ULTIMATE.start_main_~i~0#1_1056|))))' at error location [2024-11-14 04:18:07,611 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 04:18:07,611 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 04:18:07,611 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [133, 133, 133] total 266 [2024-11-14 04:18:07,611 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1651945644] [2024-11-14 04:18:07,611 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 04:18:07,612 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 267 states [2024-11-14 04:18:07,612 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 04:18:07,620 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 267 interpolants. [2024-11-14 04:18:07,625 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37136, Invalid=38764, Unknown=0, NotChecked=0, Total=75900 [2024-11-14 04:18:07,626 INFO L87 Difference]: Start difference. First operand 313 states and 320 transitions. Second operand has 267 states, 267 states have (on average 2.0374531835205993) internal successors, (544), 266 states have internal predecessors, (544), 0 states have call successors, (0), 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 04:24:15,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:24:15,168 INFO L93 Difference]: Finished difference Result 4260 states and 5051 transitions. [2024-11-14 04:24:15,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 266 states. [2024-11-14 04:24:15,168 INFO L78 Accepts]: Start accepts. Automaton has has 267 states, 267 states have (on average 2.0374531835205993) internal successors, (544), 266 states have internal predecessors, (544), 0 states have call successors, (0), 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 278 [2024-11-14 04:24:15,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:24:15,179 INFO L225 Difference]: With dead ends: 4260 [2024-11-14 04:24:15,179 INFO L226 Difference]: Without dead ends: 4260 [2024-11-14 04:24:15,183 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 965 GetRequests, 687 SyntacticMatches, 4 SemanticMatches, 274 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6491 ImplicationChecksByTransitivity, 31.9s TimeCoverageRelationStatistics Valid=37136, Invalid=38764, Unknown=0, NotChecked=0, Total=75900 [2024-11-14 04:24:15,184 INFO L432 NwaCegarLoop]: 7 mSDtfsCounter, 17373 mSDsluCounter, 1584 mSDsCounter, 0 mSdLazyCounter, 2665 mSolverCounterSat, 4213 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17373 SdHoareTripleChecker+Valid, 1591 SdHoareTripleChecker+Invalid, 6878 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.2s SdHoareTripleChecker+Time, 4213 IncrementalHoareTripleChecker+Valid, 2665 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.6s IncrementalHoareTripleChecker+Time [2024-11-14 04:24:15,184 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [17373 Valid, 1591 Invalid, 6878 Unknown, 0 Unchecked, 0.2s Time], IncrementalHoareTripleChecker [4213 Valid, 2665 Invalid, 0 Unknown, 0 Unchecked, 6.6s Time] [2024-11-14 04:24:15,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4260 states. [2024-11-14 04:24:15,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4260 to 579. [2024-11-14 04:24:15,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 579 states, 576 states have (on average 1.0173611111111112) internal successors, (586), 578 states have internal predecessors, (586), 0 states have call successors, (0), 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 04:24:15,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 579 states to 579 states and 586 transitions. [2024-11-14 04:24:15,224 INFO L78 Accepts]: Start accepts. Automaton has 579 states and 586 transitions. Word has length 278 [2024-11-14 04:24:15,224 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:24:15,225 INFO L471 AbstractCegarLoop]: Abstraction has 579 states and 586 transitions. [2024-11-14 04:24:15,225 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 267 states, 267 states have (on average 2.0374531835205993) internal successors, (544), 266 states have internal predecessors, (544), 0 states have call successors, (0), 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 04:24:15,226 INFO L276 IsEmpty]: Start isEmpty. Operand 579 states and 586 transitions. [2024-11-14 04:24:15,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 545 [2024-11-14 04:24:15,240 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:24:15,240 INFO L215 NwaCegarLoop]: trace histogram [264, 264, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 04:24:15,270 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc1578cc-ba57-45bf-ba44-df2a3d70ad13/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2024-11-14 04:24:15,441 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc1578cc-ba57-45bf-ba44-df2a3d70ad13/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2024-11-14 04:24:15,441 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 13 more)] === [2024-11-14 04:24:15,441 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:24:15,442 INFO L85 PathProgramCache]: Analyzing trace with hash 1885760444, now seen corresponding path program 2 times [2024-11-14 04:24:15,442 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:24:15,442 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [83083658] [2024-11-14 04:24:15,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:24:15,442 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:24:16,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:25:16,045 INFO L134 CoverageAnalysis]: Checked inductivity of 69698 backedges. 0 proven. 69696 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-14 04:25:16,045 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:25:16,046 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [83083658] [2024-11-14 04:25:16,046 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [83083658] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 04:25:16,046 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [79849834] [2024-11-14 04:25:16,046 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-14 04:25:16,046 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:25:16,046 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc1578cc-ba57-45bf-ba44-df2a3d70ad13/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 04:25:16,049 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc1578cc-ba57-45bf-ba44-df2a3d70ad13/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 04:25:16,050 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc1578cc-ba57-45bf-ba44-df2a3d70ad13/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-11-14 04:25:16,603 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-14 04:25:16,603 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 04:25:16,607 INFO L255 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 24 conjuncts are in the unsatisfiable core [2024-11-14 04:25:16,618 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 04:25:16,629 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2024-11-14 04:25:20,934 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 15 [2024-11-14 04:25:21,491 INFO L134 CoverageAnalysis]: Checked inductivity of 69698 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 69696 trivial. 0 not checked. [2024-11-14 04:25:21,492 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 04:25:23,021 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-14 04:25:23,022 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 82 treesize of output 78 [2024-11-14 04:25:23,044 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2024-11-14 04:25:23,044 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 16 [2024-11-14 04:25:23,109 INFO L349 Elim1Store]: treesize reduction 10, result has 65.5 percent of original size [2024-11-14 04:25:23,109 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 74 treesize of output 72 [2024-11-14 04:25:23,459 INFO L134 CoverageAnalysis]: Checked inductivity of 69698 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 69696 trivial. 0 not checked. [2024-11-14 04:25:23,460 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [79849834] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 04:25:23,460 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1588836777] [2024-11-14 04:25:23,461 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2024-11-14 04:25:23,461 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 04:25:23,462 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 04:25:23,462 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 04:25:23,462 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 04:25:23,829 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 04:25:26,718 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '27478#(and (not (= (select (select |#memory_int| |ULTIMATE.start_main_~#src~0#1.base|) |ULTIMATE.start_main_~#src~0#1.offset|) 0)) (= |ULTIMATE.start_main_~i~0#1| 0) (= (select |#valid| |ULTIMATE.start_main_~#dst~0#1.base|) 1) (exists ((|v_ULTIMATE.start_main_~i~0#1_1068| Int)) (and (= |ULTIMATE.start_main_~#dst~0#1.offset| 0) (<= 1 |#StackHeapBarrier|) (= |ULTIMATE.start_main_~#src~0#1.offset| 0) (<= 0 |v_ULTIMATE.start_main_~i~0#1_1068|) (<= 2 |ULTIMATE.start_main_~#src~0#1.base|) (<= 2 |ULTIMATE.start_main_~#dst~0#1.base|))) (= (select |#valid| |ULTIMATE.start_main_~#src~0#1.base|) 1) (not (= (select (select |#memory_int| |ULTIMATE.start_main_~#src~0#1.base|) |ULTIMATE.start_main_~#src~0#1.offset|) (select (select |#memory_int| |ULTIMATE.start_main_~#dst~0#1.base|) |ULTIMATE.start_main_~#dst~0#1.offset|))) (<= (+ |ULTIMATE.start_main_~#dst~0#1.offset| 4) (select |#length| |ULTIMATE.start_main_~#dst~0#1.base|)) (<= (+ |ULTIMATE.start_main_~#src~0#1.offset| 4) (select |#length| |ULTIMATE.start_main_~#src~0#1.base|)))' at error location [2024-11-14 04:25:26,718 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 04:25:26,718 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 04:25:26,719 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [266, 8, 9] total 281 [2024-11-14 04:25:26,719 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [481377083] [2024-11-14 04:25:26,719 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 04:25:26,720 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 281 states [2024-11-14 04:25:26,720 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 04:25:26,726 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 281 interpolants. [2024-11-14 04:25:26,729 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38262, Invalid=45548, Unknown=0, NotChecked=0, Total=83810 [2024-11-14 04:25:26,730 INFO L87 Difference]: Start difference. First operand 579 states and 586 transitions. Second operand has 281 states, 281 states have (on average 2.0462633451957295) internal successors, (575), 281 states have internal predecessors, (575), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)