./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/array-memsafety/strreplace-alloca-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version e7bb482b Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc9a2cab-f97e-4c17-817c-8b80e925e1fd/bin/utaipan-verify-FOvIYxoinp/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc9a2cab-f97e-4c17-817c-8b80e925e1fd/bin/utaipan-verify-FOvIYxoinp/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc9a2cab-f97e-4c17-817c-8b80e925e1fd/bin/utaipan-verify-FOvIYxoinp/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc9a2cab-f97e-4c17-817c-8b80e925e1fd/bin/utaipan-verify-FOvIYxoinp/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/array-memsafety/strreplace-alloca-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc9a2cab-f97e-4c17-817c-8b80e925e1fd/bin/utaipan-verify-FOvIYxoinp/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc9a2cab-f97e-4c17-817c-8b80e925e1fd/bin/utaipan-verify-FOvIYxoinp --witnessprinter.witness.filename witness.graphml --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 961e7f6fbd61acd9d4f1771460dcf26fd486b3de35e5e0e3ca8e6e03bda0fabc --- Real Ultimate output --- This is Ultimate 0.2.3-dev-e7bb482 [2023-11-06 20:56:15,386 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-06 20:56:15,460 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc9a2cab-f97e-4c17-817c-8b80e925e1fd/bin/utaipan-verify-FOvIYxoinp/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2023-11-06 20:56:15,466 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-06 20:56:15,467 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-06 20:56:15,506 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-06 20:56:15,507 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-06 20:56:15,507 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-06 20:56:15,508 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-06 20:56:15,509 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-06 20:56:15,509 INFO L153 SettingsManager]: * User list type=DISABLED [2023-11-06 20:56:15,510 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-11-06 20:56:15,510 INFO L153 SettingsManager]: * Explicit value domain=true [2023-11-06 20:56:15,511 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-11-06 20:56:15,511 INFO L153 SettingsManager]: * Octagon Domain=false [2023-11-06 20:56:15,512 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-11-06 20:56:15,512 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-11-06 20:56:15,513 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-11-06 20:56:15,513 INFO L153 SettingsManager]: * Interval Domain=false [2023-11-06 20:56:15,514 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-11-06 20:56:15,514 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-11-06 20:56:15,515 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-11-06 20:56:15,516 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-06 20:56:15,516 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-06 20:56:15,517 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-06 20:56:15,517 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-06 20:56:15,518 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-06 20:56:15,518 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-06 20:56:15,518 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-06 20:56:15,519 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-11-06 20:56:15,519 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2023-11-06 20:56:15,520 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-11-06 20:56:15,520 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-06 20:56:15,520 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-11-06 20:56:15,520 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-06 20:56:15,521 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-06 20:56:15,521 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-06 20:56:15,521 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-06 20:56:15,521 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-06 20:56:15,521 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-06 20:56:15,522 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-06 20:56:15,522 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-06 20:56:15,522 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-11-06 20:56:15,523 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-06 20:56:15,523 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-11-06 20:56:15,523 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-06 20:56:15,523 INFO L153 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc9a2cab-f97e-4c17-817c-8b80e925e1fd/bin/utaipan-verify-FOvIYxoinp/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc9a2cab-f97e-4c17-817c-8b80e925e1fd/bin/utaipan-verify-FOvIYxoinp Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 961e7f6fbd61acd9d4f1771460dcf26fd486b3de35e5e0e3ca8e6e03bda0fabc [2023-11-06 20:56:15,794 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-06 20:56:15,827 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-06 20:56:15,830 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-06 20:56:15,831 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-06 20:56:15,832 INFO L274 PluginConnector]: CDTParser initialized [2023-11-06 20:56:15,834 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc9a2cab-f97e-4c17-817c-8b80e925e1fd/bin/utaipan-verify-FOvIYxoinp/../../sv-benchmarks/c/array-memsafety/strreplace-alloca-2.i [2023-11-06 20:56:19,067 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-06 20:56:19,346 INFO L384 CDTParser]: Found 1 translation units. [2023-11-06 20:56:19,347 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc9a2cab-f97e-4c17-817c-8b80e925e1fd/sv-benchmarks/c/array-memsafety/strreplace-alloca-2.i [2023-11-06 20:56:19,363 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc9a2cab-f97e-4c17-817c-8b80e925e1fd/bin/utaipan-verify-FOvIYxoinp/data/e64b6676b/6ef69191c00646d48aa8f8bb6ab57021/FLAG798a9b516 [2023-11-06 20:56:19,378 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc9a2cab-f97e-4c17-817c-8b80e925e1fd/bin/utaipan-verify-FOvIYxoinp/data/e64b6676b/6ef69191c00646d48aa8f8bb6ab57021 [2023-11-06 20:56:19,381 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-06 20:56:19,383 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-06 20:56:19,385 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-06 20:56:19,385 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-06 20:56:19,391 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-06 20:56:19,392 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 08:56:19" (1/1) ... [2023-11-06 20:56:19,394 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@a5ec000 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 08:56:19, skipping insertion in model container [2023-11-06 20:56:19,394 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 08:56:19" (1/1) ... [2023-11-06 20:56:19,438 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-06 20:56:19,711 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-06 20:56:19,722 INFO L202 MainTranslator]: Completed pre-run [2023-11-06 20:56:19,762 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-06 20:56:19,807 INFO L206 MainTranslator]: Completed translation [2023-11-06 20:56:19,807 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 08:56:19 WrapperNode [2023-11-06 20:56:19,807 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-06 20:56:19,809 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-06 20:56:19,809 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-06 20:56:19,809 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-06 20:56:19,817 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 08:56:19" (1/1) ... [2023-11-06 20:56:19,830 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 08:56:19" (1/1) ... [2023-11-06 20:56:19,852 INFO L138 Inliner]: procedures = 117, calls = 11, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 66 [2023-11-06 20:56:19,853 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-06 20:56:19,853 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-06 20:56:19,853 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-06 20:56:19,854 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-06 20:56:19,862 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 08:56:19" (1/1) ... [2023-11-06 20:56:19,863 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 08:56:19" (1/1) ... [2023-11-06 20:56:19,866 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 08:56:19" (1/1) ... [2023-11-06 20:56:19,867 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 08:56:19" (1/1) ... [2023-11-06 20:56:19,872 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 08:56:19" (1/1) ... [2023-11-06 20:56:19,875 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 08:56:19" (1/1) ... [2023-11-06 20:56:19,877 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 08:56:19" (1/1) ... [2023-11-06 20:56:19,878 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 08:56:19" (1/1) ... [2023-11-06 20:56:19,881 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-06 20:56:19,882 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-06 20:56:19,882 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-06 20:56:19,882 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-06 20:56:19,883 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 08:56:19" (1/1) ... [2023-11-06 20:56:19,890 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-06 20:56:19,902 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc9a2cab-f97e-4c17-817c-8b80e925e1fd/bin/utaipan-verify-FOvIYxoinp/z3 [2023-11-06 20:56:19,918 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc9a2cab-f97e-4c17-817c-8b80e925e1fd/bin/utaipan-verify-FOvIYxoinp/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-06 20:56:19,956 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc9a2cab-f97e-4c17-817c-8b80e925e1fd/bin/utaipan-verify-FOvIYxoinp/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-06 20:56:19,970 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-06 20:56:19,971 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-06 20:56:19,971 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-06 20:56:19,972 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-06 20:56:19,972 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-06 20:56:19,972 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-06 20:56:20,114 INFO L236 CfgBuilder]: Building ICFG [2023-11-06 20:56:20,117 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-06 20:56:20,329 INFO L277 CfgBuilder]: Performing block encoding [2023-11-06 20:56:20,394 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-06 20:56:20,395 INFO L302 CfgBuilder]: Removed 2 assume(true) statements. [2023-11-06 20:56:20,399 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 08:56:20 BoogieIcfgContainer [2023-11-06 20:56:20,399 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-06 20:56:20,405 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-06 20:56:20,406 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-06 20:56:20,409 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-06 20:56:20,409 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 08:56:19" (1/3) ... [2023-11-06 20:56:20,410 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3e3d7078 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 08:56:20, skipping insertion in model container [2023-11-06 20:56:20,411 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 08:56:19" (2/3) ... [2023-11-06 20:56:20,414 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3e3d7078 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 08:56:20, skipping insertion in model container [2023-11-06 20:56:20,414 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 08:56:20" (3/3) ... [2023-11-06 20:56:20,417 INFO L112 eAbstractionObserver]: Analyzing ICFG strreplace-alloca-2.i [2023-11-06 20:56:20,436 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-06 20:56:20,436 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 11 error locations. [2023-11-06 20:56:20,482 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-06 20:56:20,490 INFO L357 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, mHoare=false, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, 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;@6c04a5c0, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-06 20:56:20,490 INFO L358 AbstractCegarLoop]: Starting to check reachability of 11 error locations. [2023-11-06 20:56:20,494 INFO L276 IsEmpty]: Start isEmpty. Operand has 24 states, 12 states have (on average 2.25) internal successors, (27), 23 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 20:56:20,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2023-11-06 20:56:20,500 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 20:56:20,501 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2023-11-06 20:56:20,502 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-11-06 20:56:20,507 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 20:56:20,507 INFO L85 PathProgramCache]: Analyzing trace with hash 106256, now seen corresponding path program 1 times [2023-11-06 20:56:20,517 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-06 20:56:20,518 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [360204430] [2023-11-06 20:56:20,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 20:56:20,519 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 20:56:20,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 20:56:20,811 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 20:56:20,811 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-06 20:56:20,812 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [360204430] [2023-11-06 20:56:20,813 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [360204430] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 20:56:20,813 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 20:56:20,813 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-06 20:56:20,815 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [432739863] [2023-11-06 20:56:20,816 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 20:56:20,820 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 20:56:20,820 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-06 20:56:20,864 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 20:56:20,864 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 20:56:20,866 INFO L87 Difference]: Start difference. First operand has 24 states, 12 states have (on average 2.25) internal successors, (27), 23 states have internal predecessors, (27), 0 states have call successors, (0), 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) [2023-11-06 20:56:20,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 20:56:20,929 INFO L93 Difference]: Finished difference Result 22 states and 24 transitions. [2023-11-06 20:56:20,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 20:56:20,932 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 [2023-11-06 20:56:20,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 20:56:20,940 INFO L225 Difference]: With dead ends: 22 [2023-11-06 20:56:20,940 INFO L226 Difference]: Without dead ends: 21 [2023-11-06 20:56:20,942 INFO L412 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 [2023-11-06 20:56:20,949 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 19 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 10 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-06 20:56:20,950 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 10 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-06 20:56:20,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2023-11-06 20:56:20,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2023-11-06 20:56:20,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 20 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 20:56:20,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 23 transitions. [2023-11-06 20:56:20,983 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 23 transitions. Word has length 3 [2023-11-06 20:56:20,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 20:56:20,983 INFO L495 AbstractCegarLoop]: Abstraction has 21 states and 23 transitions. [2023-11-06 20:56:20,983 INFO L496 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) [2023-11-06 20:56:20,984 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 23 transitions. [2023-11-06 20:56:20,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2023-11-06 20:56:20,984 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 20:56:20,984 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2023-11-06 20:56:20,984 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-06 20:56:20,985 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-11-06 20:56:20,985 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 20:56:20,986 INFO L85 PathProgramCache]: Analyzing trace with hash 106257, now seen corresponding path program 1 times [2023-11-06 20:56:20,986 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-06 20:56:20,986 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [156294734] [2023-11-06 20:56:20,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 20:56:20,986 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 20:56:21,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 20:56:21,347 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 20:56:21,347 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-06 20:56:21,347 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [156294734] [2023-11-06 20:56:21,347 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [156294734] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 20:56:21,348 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 20:56:21,348 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-06 20:56:21,348 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1668545607] [2023-11-06 20:56:21,348 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 20:56:21,349 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-06 20:56:21,350 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-06 20:56:21,350 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-06 20:56:21,350 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-06 20:56:21,351 INFO L87 Difference]: Start difference. First operand 21 states and 23 transitions. Second operand has 4 states, 3 states have (on average 1.0) internal successors, (3), 3 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) [2023-11-06 20:56:21,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 20:56:21,421 INFO L93 Difference]: Finished difference Result 20 states and 22 transitions. [2023-11-06 20:56:21,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-06 20:56:21,422 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 1.0) internal successors, (3), 3 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 [2023-11-06 20:56:21,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 20:56:21,422 INFO L225 Difference]: With dead ends: 20 [2023-11-06 20:56:21,422 INFO L226 Difference]: Without dead ends: 20 [2023-11-06 20:56:21,423 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-06 20:56:21,424 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 1 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-06 20:56:21,425 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 33 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-06 20:56:21,426 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2023-11-06 20:56:21,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2023-11-06 20:56:21,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 19 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 20:56:21,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 22 transitions. [2023-11-06 20:56:21,429 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 22 transitions. Word has length 3 [2023-11-06 20:56:21,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 20:56:21,429 INFO L495 AbstractCegarLoop]: Abstraction has 20 states and 22 transitions. [2023-11-06 20:56:21,429 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 1.0) internal successors, (3), 3 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) [2023-11-06 20:56:21,430 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 22 transitions. [2023-11-06 20:56:21,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2023-11-06 20:56:21,430 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 20:56:21,430 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2023-11-06 20:56:21,430 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-06 20:56:21,431 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-11-06 20:56:21,431 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 20:56:21,431 INFO L85 PathProgramCache]: Analyzing trace with hash 108096, now seen corresponding path program 1 times [2023-11-06 20:56:21,432 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-06 20:56:21,432 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1185925290] [2023-11-06 20:56:21,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 20:56:21,432 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 20:56:21,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 20:56:21,734 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 20:56:21,735 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-06 20:56:21,735 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1185925290] [2023-11-06 20:56:21,736 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1185925290] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 20:56:21,736 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 20:56:21,736 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-06 20:56:21,738 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [651283008] [2023-11-06 20:56:21,738 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 20:56:21,739 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-06 20:56:21,740 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-06 20:56:21,741 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-06 20:56:21,742 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-06 20:56:21,742 INFO L87 Difference]: Start difference. First operand 20 states and 22 transitions. Second operand has 4 states, 3 states have (on average 1.0) internal successors, (3), 3 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) [2023-11-06 20:56:21,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 20:56:21,787 INFO L93 Difference]: Finished difference Result 19 states and 21 transitions. [2023-11-06 20:56:21,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 20:56:21,788 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 1.0) internal successors, (3), 3 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 [2023-11-06 20:56:21,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 20:56:21,789 INFO L225 Difference]: With dead ends: 19 [2023-11-06 20:56:21,789 INFO L226 Difference]: Without dead ends: 19 [2023-11-06 20:56:21,791 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-06 20:56:21,801 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 19 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 9 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-06 20:56:21,802 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 9 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-06 20:56:21,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2023-11-06 20:56:21,804 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2023-11-06 20:56:21,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 12 states have (on average 1.75) internal successors, (21), 18 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 20:56:21,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 21 transitions. [2023-11-06 20:56:21,805 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 21 transitions. Word has length 3 [2023-11-06 20:56:21,805 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 20:56:21,805 INFO L495 AbstractCegarLoop]: Abstraction has 19 states and 21 transitions. [2023-11-06 20:56:21,806 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 1.0) internal successors, (3), 3 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) [2023-11-06 20:56:21,806 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 21 transitions. [2023-11-06 20:56:21,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2023-11-06 20:56:21,806 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 20:56:21,806 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2023-11-06 20:56:21,807 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-06 20:56:21,807 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-11-06 20:56:21,807 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 20:56:21,807 INFO L85 PathProgramCache]: Analyzing trace with hash 3352253, now seen corresponding path program 1 times [2023-11-06 20:56:21,808 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-06 20:56:21,808 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [822171020] [2023-11-06 20:56:21,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 20:56:21,808 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 20:56:21,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 20:56:21,920 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 20:56:21,921 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-06 20:56:21,921 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [822171020] [2023-11-06 20:56:21,921 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [822171020] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 20:56:21,921 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 20:56:21,921 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-06 20:56:21,922 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1016071500] [2023-11-06 20:56:21,922 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 20:56:21,922 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 20:56:21,922 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-06 20:56:21,923 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 20:56:21,923 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 20:56:21,924 INFO L87 Difference]: Start difference. First operand 19 states and 21 transitions. Second operand has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 20:56:21,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 20:56:21,961 INFO L93 Difference]: Finished difference Result 16 states and 18 transitions. [2023-11-06 20:56:21,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 20:56:21,962 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 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 4 [2023-11-06 20:56:21,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 20:56:21,963 INFO L225 Difference]: With dead ends: 16 [2023-11-06 20:56:21,963 INFO L226 Difference]: Without dead ends: 16 [2023-11-06 20:56:21,963 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 20:56:21,975 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 10 mSDsluCounter, 1 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 7 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-06 20:56:21,976 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 7 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-06 20:56:21,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2023-11-06 20:56:21,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2023-11-06 20:56:21,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 12 states have (on average 1.5) internal successors, (18), 15 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 20:56:21,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 18 transitions. [2023-11-06 20:56:21,984 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 18 transitions. Word has length 4 [2023-11-06 20:56:21,984 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 20:56:21,984 INFO L495 AbstractCegarLoop]: Abstraction has 16 states and 18 transitions. [2023-11-06 20:56:21,985 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 20:56:21,985 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 18 transitions. [2023-11-06 20:56:21,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2023-11-06 20:56:21,985 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 20:56:21,985 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2023-11-06 20:56:21,986 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-06 20:56:21,986 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-11-06 20:56:21,987 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 20:56:21,987 INFO L85 PathProgramCache]: Analyzing trace with hash 3352254, now seen corresponding path program 1 times [2023-11-06 20:56:21,987 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-06 20:56:21,988 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [77096612] [2023-11-06 20:56:21,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 20:56:21,988 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 20:56:22,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 20:56:22,118 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 20:56:22,119 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-06 20:56:22,119 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [77096612] [2023-11-06 20:56:22,119 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [77096612] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 20:56:22,119 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 20:56:22,120 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-06 20:56:22,120 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1314985537] [2023-11-06 20:56:22,120 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 20:56:22,121 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-06 20:56:22,121 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-06 20:56:22,122 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-06 20:56:22,122 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-06 20:56:22,122 INFO L87 Difference]: Start difference. First operand 16 states and 18 transitions. Second operand has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 20:56:22,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 20:56:22,169 INFO L93 Difference]: Finished difference Result 23 states and 27 transitions. [2023-11-06 20:56:22,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-06 20:56:22,170 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 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 4 [2023-11-06 20:56:22,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 20:56:22,170 INFO L225 Difference]: With dead ends: 23 [2023-11-06 20:56:22,171 INFO L226 Difference]: Without dead ends: 23 [2023-11-06 20:56:22,171 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-06 20:56:22,172 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 32 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 15 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-06 20:56:22,173 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [32 Valid, 15 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-06 20:56:22,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2023-11-06 20:56:22,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 21. [2023-11-06 20:56:22,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 20 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 20:56:22,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 25 transitions. [2023-11-06 20:56:22,177 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 25 transitions. Word has length 4 [2023-11-06 20:56:22,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 20:56:22,178 INFO L495 AbstractCegarLoop]: Abstraction has 21 states and 25 transitions. [2023-11-06 20:56:22,178 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 20:56:22,178 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 25 transitions. [2023-11-06 20:56:22,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2023-11-06 20:56:22,179 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 20:56:22,179 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-11-06 20:56:22,180 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-06 20:56:22,180 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-11-06 20:56:22,180 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 20:56:22,181 INFO L85 PathProgramCache]: Analyzing trace with hash 1082733191, now seen corresponding path program 1 times [2023-11-06 20:56:22,181 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-06 20:56:22,181 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [910836237] [2023-11-06 20:56:22,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 20:56:22,181 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 20:56:22,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 20:56:22,356 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 20:56:22,357 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-06 20:56:22,357 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [910836237] [2023-11-06 20:56:22,358 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [910836237] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 20:56:22,358 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 20:56:22,358 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-06 20:56:22,358 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [69503479] [2023-11-06 20:56:22,359 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 20:56:22,359 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-06 20:56:22,359 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-06 20:56:22,360 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-06 20:56:22,360 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-06 20:56:22,360 INFO L87 Difference]: Start difference. First operand 21 states and 25 transitions. Second operand has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 20:56:22,395 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 20:56:22,395 INFO L93 Difference]: Finished difference Result 20 states and 24 transitions. [2023-11-06 20:56:22,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-06 20:56:22,400 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 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 [2023-11-06 20:56:22,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 20:56:22,403 INFO L225 Difference]: With dead ends: 20 [2023-11-06 20:56:22,403 INFO L226 Difference]: Without dead ends: 18 [2023-11-06 20:56:22,404 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-06 20:56:22,405 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 11 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-06 20:56:22,406 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 18 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-06 20:56:22,409 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2023-11-06 20:56:22,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2023-11-06 20:56:22,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 15 states have (on average 1.4) internal successors, (21), 17 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 20:56:22,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 21 transitions. [2023-11-06 20:56:22,422 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 21 transitions. Word has length 7 [2023-11-06 20:56:22,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 20:56:22,422 INFO L495 AbstractCegarLoop]: Abstraction has 18 states and 21 transitions. [2023-11-06 20:56:22,422 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 20:56:22,423 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 21 transitions. [2023-11-06 20:56:22,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2023-11-06 20:56:22,425 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 20:56:22,425 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 20:56:22,425 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-06 20:56:22,426 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-11-06 20:56:22,426 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 20:56:22,426 INFO L85 PathProgramCache]: Analyzing trace with hash 1125545799, now seen corresponding path program 1 times [2023-11-06 20:56:22,427 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-06 20:56:22,427 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1277623640] [2023-11-06 20:56:22,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 20:56:22,427 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 20:56:22,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 20:56:22,708 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 20:56:22,709 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-06 20:56:22,709 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1277623640] [2023-11-06 20:56:22,709 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1277623640] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 20:56:22,709 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 20:56:22,710 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-06 20:56:22,710 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1524508220] [2023-11-06 20:56:22,710 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 20:56:22,710 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-06 20:56:22,711 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-06 20:56:22,712 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-06 20:56:22,712 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-11-06 20:56:22,712 INFO L87 Difference]: Start difference. First operand 18 states and 21 transitions. Second operand has 6 states, 6 states have (on average 1.5) internal successors, (9), 5 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 20:56:22,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 20:56:22,793 INFO L93 Difference]: Finished difference Result 23 states and 26 transitions. [2023-11-06 20:56:22,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-06 20:56:22,794 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.5) internal successors, (9), 5 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2023-11-06 20:56:22,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 20:56:22,795 INFO L225 Difference]: With dead ends: 23 [2023-11-06 20:56:22,795 INFO L226 Difference]: Without dead ends: 20 [2023-11-06 20:56:22,796 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2023-11-06 20:56:22,797 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 4 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-06 20:56:22,797 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 36 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-06 20:56:22,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2023-11-06 20:56:22,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 19. [2023-11-06 20:56:22,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 16 states have (on average 1.375) internal successors, (22), 18 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 20:56:22,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 22 transitions. [2023-11-06 20:56:22,801 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 22 transitions. Word has length 9 [2023-11-06 20:56:22,801 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 20:56:22,801 INFO L495 AbstractCegarLoop]: Abstraction has 19 states and 22 transitions. [2023-11-06 20:56:22,802 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 1.5) internal successors, (9), 5 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 20:56:22,802 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 22 transitions. [2023-11-06 20:56:22,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2023-11-06 20:56:22,802 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 20:56:22,802 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 20:56:22,803 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-11-06 20:56:22,803 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-11-06 20:56:22,804 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 20:56:22,804 INFO L85 PathProgramCache]: Analyzing trace with hash -1220148709, now seen corresponding path program 1 times [2023-11-06 20:56:22,804 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-06 20:56:22,804 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1177851530] [2023-11-06 20:56:22,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 20:56:22,805 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 20:56:22,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 20:56:23,089 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 20:56:23,090 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-06 20:56:23,090 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1177851530] [2023-11-06 20:56:23,090 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1177851530] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 20:56:23,090 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [145198999] [2023-11-06 20:56:23,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 20:56:23,091 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 20:56:23,091 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc9a2cab-f97e-4c17-817c-8b80e925e1fd/bin/utaipan-verify-FOvIYxoinp/z3 [2023-11-06 20:56:23,094 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc9a2cab-f97e-4c17-817c-8b80e925e1fd/bin/utaipan-verify-FOvIYxoinp/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 20:56:23,104 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc9a2cab-f97e-4c17-817c-8b80e925e1fd/bin/utaipan-verify-FOvIYxoinp/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-06 20:56:23,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 20:56:23,183 INFO L262 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 20 conjunts are in the unsatisfiable core [2023-11-06 20:56:23,188 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 20:56:23,316 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 20:56:23,316 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 20:56:23,473 INFO L351 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 5 treesize of output 3 [2023-11-06 20:56:23,501 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 20:56:23,502 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [145198999] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 20:56:23,502 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2085752085] [2023-11-06 20:56:23,522 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2023-11-06 20:56:23,522 INFO L166 IcfgInterpreter]: Building call graph [2023-11-06 20:56:23,526 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-06 20:56:23,532 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-06 20:56:23,533 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-06 20:56:24,711 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-06 20:56:25,100 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '413#(and (<= 1 |#StackHeapBarrier|) (<= 2 |ULTIMATE.start_main_#t~malloc7#1.base|) (<= 1 |ULTIMATE.start_main_~length1~0#1|) (<= 2 |ULTIMATE.start_cstrreplace_~s#1.base|) (<= |ULTIMATE.start_main_#t~nondet10#1| 2147483647) (<= 2 |ULTIMATE.start_cstrreplace_#in~s#1.base|) (= |ULTIMATE.start_cstrreplace_~numReplaced~0#1| 0) (= |ULTIMATE.start_main_~nondetString1~0#1.offset| 0) (<= |ULTIMATE.start_main_#t~nondet11#1| 2147483647) (= |ULTIMATE.start_cstrreplace_#in~s#1.offset| 0) (<= (select |#length| |ULTIMATE.start_cstrreplace_~p~0#1.base|) |ULTIMATE.start_cstrreplace_~p~0#1.offset|) (<= 0 |ULTIMATE.start_cstrreplace_~p~0#1.offset|) (= |ULTIMATE.start_main_#t~malloc7#1.offset| 0) (= |ULTIMATE.start_cstrreplace_~s#1.offset| 0) (<= 2 |ULTIMATE.start_main_~nondetString1~0#1.base|) (<= 0 (+ 2147483648 |ULTIMATE.start_main_#t~nondet11#1|)) (<= 2 |ULTIMATE.start_cstrreplace_~p~0#1.base|) (<= 0 (+ 2147483648 |ULTIMATE.start_main_#t~nondet10#1|)))' at error location [2023-11-06 20:56:25,101 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-06 20:56:25,101 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 20:56:25,101 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5, 5] total 11 [2023-11-06 20:56:25,101 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [741674284] [2023-11-06 20:56:25,102 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 20:56:25,103 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-11-06 20:56:25,104 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-06 20:56:25,105 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-11-06 20:56:25,107 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342 [2023-11-06 20:56:25,107 INFO L87 Difference]: Start difference. First operand 19 states and 22 transitions. Second operand has 13 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 12 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 20:56:25,266 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 20:56:25,267 INFO L93 Difference]: Finished difference Result 24 states and 28 transitions. [2023-11-06 20:56:25,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-06 20:56:25,268 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 12 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2023-11-06 20:56:25,268 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 20:56:25,268 INFO L225 Difference]: With dead ends: 24 [2023-11-06 20:56:25,268 INFO L226 Difference]: Without dead ends: 24 [2023-11-06 20:56:25,269 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 124 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=95, Invalid=411, Unknown=0, NotChecked=0, Total=506 [2023-11-06 20:56:25,270 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 65 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 20 SdHoareTripleChecker+Invalid, 61 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-06 20:56:25,271 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [65 Valid, 20 Invalid, 61 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-06 20:56:25,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2023-11-06 20:56:25,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 19. [2023-11-06 20:56:25,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 18 states have (on average 1.2222222222222223) internal successors, (22), 18 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 20:56:25,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 22 transitions. [2023-11-06 20:56:25,274 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 22 transitions. Word has length 11 [2023-11-06 20:56:25,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 20:56:25,274 INFO L495 AbstractCegarLoop]: Abstraction has 19 states and 22 transitions. [2023-11-06 20:56:25,274 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 12 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 20:56:25,275 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 22 transitions. [2023-11-06 20:56:25,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2023-11-06 20:56:25,275 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 20:56:25,275 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2023-11-06 20:56:25,282 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc9a2cab-f97e-4c17-817c-8b80e925e1fd/bin/utaipan-verify-FOvIYxoinp/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-06 20:56:25,482 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc9a2cab-f97e-4c17-817c-8b80e925e1fd/bin/utaipan-verify-FOvIYxoinp/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 20:56:25,482 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-11-06 20:56:25,483 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 20:56:25,483 INFO L85 PathProgramCache]: Analyzing trace with hash 2068262410, now seen corresponding path program 2 times [2023-11-06 20:56:25,483 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-06 20:56:25,483 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1660747577] [2023-11-06 20:56:25,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 20:56:25,484 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 20:56:25,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 20:56:25,910 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 20:56:25,911 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-06 20:56:25,911 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1660747577] [2023-11-06 20:56:25,911 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1660747577] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 20:56:25,911 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [243499346] [2023-11-06 20:56:25,912 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-06 20:56:25,912 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 20:56:25,912 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc9a2cab-f97e-4c17-817c-8b80e925e1fd/bin/utaipan-verify-FOvIYxoinp/z3 [2023-11-06 20:56:25,917 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc9a2cab-f97e-4c17-817c-8b80e925e1fd/bin/utaipan-verify-FOvIYxoinp/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 20:56:25,935 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc9a2cab-f97e-4c17-817c-8b80e925e1fd/bin/utaipan-verify-FOvIYxoinp/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-06 20:56:26,002 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-11-06 20:56:26,002 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 20:56:26,004 INFO L262 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 28 conjunts are in the unsatisfiable core [2023-11-06 20:56:26,006 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 20:56:26,125 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 13 treesize of output 9 [2023-11-06 20:56:26,269 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 20:56:26,270 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 20:56:26,364 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 15 treesize of output 13 [2023-11-06 20:56:26,371 INFO L351 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 24 treesize of output 20 [2023-11-06 20:56:26,576 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 20:56:26,577 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [243499346] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 20:56:26,577 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [753253829] [2023-11-06 20:56:26,582 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2023-11-06 20:56:26,582 INFO L166 IcfgInterpreter]: Building call graph [2023-11-06 20:56:26,582 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-06 20:56:26,583 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-06 20:56:26,583 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-06 20:56:27,383 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-06 20:56:27,885 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '582#(and (<= 1 |#StackHeapBarrier|) (<= 2 |ULTIMATE.start_main_#t~malloc7#1.base|) (<= 1 |ULTIMATE.start_main_~length1~0#1|) (<= 2 |ULTIMATE.start_cstrreplace_~s#1.base|) (<= |ULTIMATE.start_main_#t~nondet10#1| 2147483647) (<= 2 |ULTIMATE.start_cstrreplace_#in~s#1.base|) (= |ULTIMATE.start_cstrreplace_~numReplaced~0#1| 0) (= |ULTIMATE.start_main_~nondetString1~0#1.offset| 0) (<= |ULTIMATE.start_main_#t~nondet11#1| 2147483647) (= |ULTIMATE.start_cstrreplace_#in~s#1.offset| 0) (<= (select |#length| |ULTIMATE.start_cstrreplace_~p~0#1.base|) |ULTIMATE.start_cstrreplace_~p~0#1.offset|) (<= 0 |ULTIMATE.start_cstrreplace_~p~0#1.offset|) (= |ULTIMATE.start_main_#t~malloc7#1.offset| 0) (= |ULTIMATE.start_cstrreplace_~s#1.offset| 0) (<= 2 |ULTIMATE.start_main_~nondetString1~0#1.base|) (<= 0 (+ 2147483648 |ULTIMATE.start_main_#t~nondet11#1|)) (<= 2 |ULTIMATE.start_cstrreplace_~p~0#1.base|) (<= 0 (+ 2147483648 |ULTIMATE.start_main_#t~nondet10#1|)))' at error location [2023-11-06 20:56:27,885 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-06 20:56:27,885 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 20:56:27,886 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 9] total 21 [2023-11-06 20:56:27,886 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1984403308] [2023-11-06 20:56:27,886 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 20:56:27,886 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-11-06 20:56:27,887 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-06 20:56:27,887 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-11-06 20:56:27,888 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=663, Unknown=0, NotChecked=0, Total=756 [2023-11-06 20:56:27,888 INFO L87 Difference]: Start difference. First operand 19 states and 22 transitions. Second operand has 22 states, 22 states have (on average 1.5909090909090908) internal successors, (35), 21 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) [2023-11-06 20:56:28,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 20:56:28,157 INFO L93 Difference]: Finished difference Result 31 states and 35 transitions. [2023-11-06 20:56:28,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-06 20:56:28,158 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.5909090909090908) internal successors, (35), 21 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 16 [2023-11-06 20:56:28,158 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 20:56:28,159 INFO L225 Difference]: With dead ends: 31 [2023-11-06 20:56:28,159 INFO L226 Difference]: Without dead ends: 22 [2023-11-06 20:56:28,159 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 255 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=157, Invalid=965, Unknown=0, NotChecked=0, Total=1122 [2023-11-06 20:56:28,160 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 44 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 128 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 61 SdHoareTripleChecker+Invalid, 133 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 128 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-06 20:56:28,161 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [44 Valid, 61 Invalid, 133 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 128 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-06 20:56:28,161 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2023-11-06 20:56:28,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 21. [2023-11-06 20:56:28,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 20 states have (on average 1.2) internal successors, (24), 20 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 20:56:28,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 24 transitions. [2023-11-06 20:56:28,164 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 24 transitions. Word has length 16 [2023-11-06 20:56:28,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 20:56:28,164 INFO L495 AbstractCegarLoop]: Abstraction has 21 states and 24 transitions. [2023-11-06 20:56:28,164 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.5909090909090908) internal successors, (35), 21 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) [2023-11-06 20:56:28,164 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 24 transitions. [2023-11-06 20:56:28,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2023-11-06 20:56:28,165 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 20:56:28,165 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1] [2023-11-06 20:56:28,176 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc9a2cab-f97e-4c17-817c-8b80e925e1fd/bin/utaipan-verify-FOvIYxoinp/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-11-06 20:56:28,376 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc9a2cab-f97e-4c17-817c-8b80e925e1fd/bin/utaipan-verify-FOvIYxoinp/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 20:56:28,376 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-11-06 20:56:28,377 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 20:56:28,377 INFO L85 PathProgramCache]: Analyzing trace with hash 752979126, now seen corresponding path program 3 times [2023-11-06 20:56:28,377 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-06 20:56:28,377 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [799803950] [2023-11-06 20:56:28,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 20:56:28,378 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 20:56:28,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 20:56:28,724 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 20:56:28,725 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-06 20:56:28,725 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [799803950] [2023-11-06 20:56:28,725 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [799803950] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 20:56:28,725 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1273510018] [2023-11-06 20:56:28,725 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-06 20:56:28,726 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 20:56:28,726 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc9a2cab-f97e-4c17-817c-8b80e925e1fd/bin/utaipan-verify-FOvIYxoinp/z3 [2023-11-06 20:56:28,727 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc9a2cab-f97e-4c17-817c-8b80e925e1fd/bin/utaipan-verify-FOvIYxoinp/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 20:56:28,756 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc9a2cab-f97e-4c17-817c-8b80e925e1fd/bin/utaipan-verify-FOvIYxoinp/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-06 20:56:28,810 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-06 20:56:28,811 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 20:56:28,812 INFO L262 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 26 conjunts are in the unsatisfiable core [2023-11-06 20:56:28,816 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 20:56:28,820 INFO L351 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 [2023-11-06 20:56:28,945 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 20:56:28,945 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 20:56:29,185 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 20:56:29,185 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1273510018] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 20:56:29,185 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2013894912] [2023-11-06 20:56:29,188 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2023-11-06 20:56:29,188 INFO L166 IcfgInterpreter]: Building call graph [2023-11-06 20:56:29,188 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-06 20:56:29,188 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-06 20:56:29,189 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-06 20:56:29,838 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-06 20:56:30,268 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '774#(and (<= 1 |#StackHeapBarrier|) (<= 2 |ULTIMATE.start_main_#t~malloc7#1.base|) (<= 1 |ULTIMATE.start_main_~length1~0#1|) (<= 2 |ULTIMATE.start_cstrreplace_~s#1.base|) (<= |ULTIMATE.start_main_#t~nondet10#1| 2147483647) (<= 2 |ULTIMATE.start_cstrreplace_#in~s#1.base|) (= |ULTIMATE.start_cstrreplace_~numReplaced~0#1| 0) (= |ULTIMATE.start_main_~nondetString1~0#1.offset| 0) (<= |ULTIMATE.start_main_#t~nondet11#1| 2147483647) (= |ULTIMATE.start_cstrreplace_#in~s#1.offset| 0) (<= (select |#length| |ULTIMATE.start_cstrreplace_~p~0#1.base|) |ULTIMATE.start_cstrreplace_~p~0#1.offset|) (<= 0 |ULTIMATE.start_cstrreplace_~p~0#1.offset|) (= |ULTIMATE.start_main_#t~malloc7#1.offset| 0) (= |ULTIMATE.start_cstrreplace_~s#1.offset| 0) (<= 2 |ULTIMATE.start_main_~nondetString1~0#1.base|) (<= 0 (+ 2147483648 |ULTIMATE.start_main_#t~nondet11#1|)) (<= 2 |ULTIMATE.start_cstrreplace_~p~0#1.base|) (<= 0 (+ 2147483648 |ULTIMATE.start_main_#t~nondet10#1|)))' at error location [2023-11-06 20:56:30,268 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-06 20:56:30,269 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 20:56:30,269 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 18 [2023-11-06 20:56:30,269 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [829102808] [2023-11-06 20:56:30,269 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 20:56:30,270 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-11-06 20:56:30,270 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-06 20:56:30,270 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-11-06 20:56:30,271 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=556, Unknown=0, NotChecked=0, Total=650 [2023-11-06 20:56:30,271 INFO L87 Difference]: Start difference. First operand 21 states and 24 transitions. Second operand has 20 states, 19 states have (on average 2.526315789473684) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 20:56:30,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 20:56:30,550 INFO L93 Difference]: Finished difference Result 32 states and 37 transitions. [2023-11-06 20:56:30,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-06 20:56:30,551 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 2.526315789473684) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 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 [2023-11-06 20:56:30,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 20:56:30,551 INFO L225 Difference]: With dead ends: 32 [2023-11-06 20:56:30,552 INFO L226 Difference]: Without dead ends: 32 [2023-11-06 20:56:30,552 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 243 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=141, Invalid=789, Unknown=0, NotChecked=0, Total=930 [2023-11-06 20:56:30,553 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 119 mSDsluCounter, 60 mSDsCounter, 0 mSdLazyCounter, 160 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 119 SdHoareTripleChecker+Valid, 69 SdHoareTripleChecker+Invalid, 161 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 160 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-06 20:56:30,553 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [119 Valid, 69 Invalid, 161 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 160 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-06 20:56:30,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2023-11-06 20:56:30,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 27. [2023-11-06 20:56:30,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 26 states have (on average 1.1923076923076923) internal successors, (31), 26 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) [2023-11-06 20:56:30,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 31 transitions. [2023-11-06 20:56:30,557 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 31 transitions. Word has length 18 [2023-11-06 20:56:30,557 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 20:56:30,557 INFO L495 AbstractCegarLoop]: Abstraction has 27 states and 31 transitions. [2023-11-06 20:56:30,558 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 2.526315789473684) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 20:56:30,558 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 31 transitions. [2023-11-06 20:56:30,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2023-11-06 20:56:30,558 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 20:56:30,558 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1] [2023-11-06 20:56:30,569 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc9a2cab-f97e-4c17-817c-8b80e925e1fd/bin/utaipan-verify-FOvIYxoinp/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-06 20:56:30,769 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc9a2cab-f97e-4c17-817c-8b80e925e1fd/bin/utaipan-verify-FOvIYxoinp/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 20:56:30,769 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-11-06 20:56:30,770 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 20:56:30,770 INFO L85 PathProgramCache]: Analyzing trace with hash -741274545, now seen corresponding path program 4 times [2023-11-06 20:56:30,770 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-06 20:56:30,770 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1237940466] [2023-11-06 20:56:30,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 20:56:30,770 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 20:56:30,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 20:56:31,236 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 9 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 20:56:31,237 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-06 20:56:31,237 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1237940466] [2023-11-06 20:56:31,237 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1237940466] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 20:56:31,237 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1135011848] [2023-11-06 20:56:31,237 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-06 20:56:31,238 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 20:56:31,238 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc9a2cab-f97e-4c17-817c-8b80e925e1fd/bin/utaipan-verify-FOvIYxoinp/z3 [2023-11-06 20:56:31,239 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc9a2cab-f97e-4c17-817c-8b80e925e1fd/bin/utaipan-verify-FOvIYxoinp/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 20:56:31,264 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc9a2cab-f97e-4c17-817c-8b80e925e1fd/bin/utaipan-verify-FOvIYxoinp/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-06 20:56:31,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 20:56:31,320 INFO L262 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 34 conjunts are in the unsatisfiable core [2023-11-06 20:56:31,322 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 20:56:31,475 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 13 treesize of output 9 [2023-11-06 20:56:31,624 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 9 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 20:56:31,625 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 20:56:31,705 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 15 treesize of output 13 [2023-11-06 20:56:31,710 INFO L351 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 24 treesize of output 20 [2023-11-06 20:56:31,956 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 9 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 20:56:31,957 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1135011848] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 20:56:31,957 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1985204289] [2023-11-06 20:56:31,960 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2023-11-06 20:56:31,960 INFO L166 IcfgInterpreter]: Building call graph [2023-11-06 20:56:31,960 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-06 20:56:31,960 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-06 20:56:31,961 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-06 20:56:32,582 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-06 20:56:33,057 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1007#(and (<= 1 |#StackHeapBarrier|) (<= 2 |ULTIMATE.start_main_#t~malloc7#1.base|) (<= 1 |ULTIMATE.start_main_~length1~0#1|) (<= 2 |ULTIMATE.start_cstrreplace_~s#1.base|) (<= |ULTIMATE.start_main_#t~nondet10#1| 2147483647) (<= 2 |ULTIMATE.start_cstrreplace_#in~s#1.base|) (= |ULTIMATE.start_cstrreplace_~numReplaced~0#1| 0) (= |ULTIMATE.start_main_~nondetString1~0#1.offset| 0) (<= |ULTIMATE.start_main_#t~nondet11#1| 2147483647) (= |ULTIMATE.start_cstrreplace_#in~s#1.offset| 0) (<= (select |#length| |ULTIMATE.start_cstrreplace_~p~0#1.base|) |ULTIMATE.start_cstrreplace_~p~0#1.offset|) (<= 0 |ULTIMATE.start_cstrreplace_~p~0#1.offset|) (= |ULTIMATE.start_main_#t~malloc7#1.offset| 0) (= |ULTIMATE.start_cstrreplace_~s#1.offset| 0) (<= 2 |ULTIMATE.start_main_~nondetString1~0#1.base|) (<= 0 (+ 2147483648 |ULTIMATE.start_main_#t~nondet11#1|)) (<= 2 |ULTIMATE.start_cstrreplace_~p~0#1.base|) (<= 0 (+ 2147483648 |ULTIMATE.start_main_#t~nondet10#1|)))' at error location [2023-11-06 20:56:33,058 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-06 20:56:33,058 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 20:56:33,058 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 11] total 25 [2023-11-06 20:56:33,058 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1839530297] [2023-11-06 20:56:33,058 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 20:56:33,059 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-11-06 20:56:33,059 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-06 20:56:33,064 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-11-06 20:56:33,064 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=888, Unknown=0, NotChecked=0, Total=992 [2023-11-06 20:56:33,065 INFO L87 Difference]: Start difference. First operand 27 states and 31 transitions. Second operand has 26 states, 26 states have (on average 1.9230769230769231) internal successors, (50), 25 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 20:56:33,363 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 20:56:33,363 INFO L93 Difference]: Finished difference Result 45 states and 51 transitions. [2023-11-06 20:56:33,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-11-06 20:56:33,364 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.9230769230769231) internal successors, (50), 25 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2023-11-06 20:56:33,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 20:56:33,364 INFO L225 Difference]: With dead ends: 45 [2023-11-06 20:56:33,365 INFO L226 Difference]: Without dead ends: 30 [2023-11-06 20:56:33,365 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 275 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=161, Invalid=1245, Unknown=0, NotChecked=0, Total=1406 [2023-11-06 20:56:33,366 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 72 mSDsluCounter, 71 mSDsCounter, 0 mSdLazyCounter, 190 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 78 SdHoareTripleChecker+Invalid, 196 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 190 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-06 20:56:33,366 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [72 Valid, 78 Invalid, 196 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 190 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-06 20:56:33,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2023-11-06 20:56:33,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 29. [2023-11-06 20:56:33,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 28 states have (on average 1.1785714285714286) internal successors, (33), 28 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) [2023-11-06 20:56:33,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 33 transitions. [2023-11-06 20:56:33,373 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 33 transitions. Word has length 23 [2023-11-06 20:56:33,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 20:56:33,374 INFO L495 AbstractCegarLoop]: Abstraction has 29 states and 33 transitions. [2023-11-06 20:56:33,374 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.9230769230769231) internal successors, (50), 25 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 20:56:33,376 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 33 transitions. [2023-11-06 20:56:33,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2023-11-06 20:56:33,377 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 20:56:33,377 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1] [2023-11-06 20:56:33,384 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc9a2cab-f97e-4c17-817c-8b80e925e1fd/bin/utaipan-verify-FOvIYxoinp/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-06 20:56:33,578 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc9a2cab-f97e-4c17-817c-8b80e925e1fd/bin/utaipan-verify-FOvIYxoinp/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 20:56:33,578 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-11-06 20:56:33,578 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 20:56:33,579 INFO L85 PathProgramCache]: Analyzing trace with hash 2059080739, now seen corresponding path program 5 times [2023-11-06 20:56:33,579 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-06 20:56:33,579 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1094092911] [2023-11-06 20:56:33,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 20:56:33,579 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 20:56:33,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 20:56:33,920 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 4 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 20:56:33,921 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-06 20:56:33,921 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1094092911] [2023-11-06 20:56:33,921 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1094092911] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 20:56:33,921 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [554754668] [2023-11-06 20:56:33,921 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-06 20:56:33,922 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 20:56:33,922 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc9a2cab-f97e-4c17-817c-8b80e925e1fd/bin/utaipan-verify-FOvIYxoinp/z3 [2023-11-06 20:56:33,923 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc9a2cab-f97e-4c17-817c-8b80e925e1fd/bin/utaipan-verify-FOvIYxoinp/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 20:56:33,956 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc9a2cab-f97e-4c17-817c-8b80e925e1fd/bin/utaipan-verify-FOvIYxoinp/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-06 20:56:34,033 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-11-06 20:56:34,033 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 20:56:34,035 INFO L262 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 28 conjunts are in the unsatisfiable core [2023-11-06 20:56:34,038 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 20:56:34,206 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 4 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 20:56:34,207 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 20:56:34,413 INFO L351 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 [2023-11-06 20:56:34,468 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 4 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 20:56:34,468 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [554754668] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 20:56:34,469 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1248765831] [2023-11-06 20:56:34,472 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2023-11-06 20:56:34,472 INFO L166 IcfgInterpreter]: Building call graph [2023-11-06 20:56:34,472 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-06 20:56:34,473 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-06 20:56:34,473 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-06 20:56:35,155 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-06 20:56:35,604 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1267#(and (<= 1 |#StackHeapBarrier|) (<= 2 |ULTIMATE.start_main_#t~malloc7#1.base|) (<= 1 |ULTIMATE.start_main_~length1~0#1|) (<= 2 |ULTIMATE.start_cstrreplace_~s#1.base|) (<= |ULTIMATE.start_main_#t~nondet10#1| 2147483647) (<= 2 |ULTIMATE.start_cstrreplace_#in~s#1.base|) (= |ULTIMATE.start_cstrreplace_~numReplaced~0#1| 0) (= |ULTIMATE.start_main_~nondetString1~0#1.offset| 0) (<= |ULTIMATE.start_main_#t~nondet11#1| 2147483647) (= |ULTIMATE.start_cstrreplace_#in~s#1.offset| 0) (<= (select |#length| |ULTIMATE.start_cstrreplace_~p~0#1.base|) |ULTIMATE.start_cstrreplace_~p~0#1.offset|) (<= 0 |ULTIMATE.start_cstrreplace_~p~0#1.offset|) (= |ULTIMATE.start_main_#t~malloc7#1.offset| 0) (= |ULTIMATE.start_cstrreplace_~s#1.offset| 0) (<= 2 |ULTIMATE.start_main_~nondetString1~0#1.base|) (<= 0 (+ 2147483648 |ULTIMATE.start_main_#t~nondet11#1|)) (<= 2 |ULTIMATE.start_cstrreplace_~p~0#1.base|) (<= 0 (+ 2147483648 |ULTIMATE.start_main_#t~nondet10#1|)))' at error location [2023-11-06 20:56:35,604 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-06 20:56:35,604 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 20:56:35,605 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 9] total 22 [2023-11-06 20:56:35,605 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [285889362] [2023-11-06 20:56:35,605 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 20:56:35,606 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-11-06 20:56:35,606 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-06 20:56:35,607 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-11-06 20:56:35,608 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=743, Unknown=0, NotChecked=0, Total=870 [2023-11-06 20:56:35,608 INFO L87 Difference]: Start difference. First operand 29 states and 33 transitions. Second operand has 24 states, 23 states have (on average 2.9130434782608696) internal successors, (67), 23 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 20:56:35,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 20:56:35,899 INFO L93 Difference]: Finished difference Result 40 states and 46 transitions. [2023-11-06 20:56:35,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-06 20:56:35,900 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 2.9130434782608696) internal successors, (67), 23 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2023-11-06 20:56:35,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 20:56:35,901 INFO L225 Difference]: With dead ends: 40 [2023-11-06 20:56:35,901 INFO L226 Difference]: Without dead ends: 40 [2023-11-06 20:56:35,902 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 49 SyntacticMatches, 4 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 423 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=191, Invalid=1069, Unknown=0, NotChecked=0, Total=1260 [2023-11-06 20:56:35,903 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 116 mSDsluCounter, 65 mSDsCounter, 0 mSdLazyCounter, 180 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 116 SdHoareTripleChecker+Valid, 78 SdHoareTripleChecker+Invalid, 181 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 180 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-06 20:56:35,903 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [116 Valid, 78 Invalid, 181 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 180 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-06 20:56:35,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2023-11-06 20:56:35,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 35. [2023-11-06 20:56:35,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 34 states have (on average 1.1764705882352942) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 20:56:35,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 40 transitions. [2023-11-06 20:56:35,908 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 40 transitions. Word has length 25 [2023-11-06 20:56:35,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 20:56:35,909 INFO L495 AbstractCegarLoop]: Abstraction has 35 states and 40 transitions. [2023-11-06 20:56:35,909 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 2.9130434782608696) internal successors, (67), 23 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 20:56:35,909 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 40 transitions. [2023-11-06 20:56:35,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2023-11-06 20:56:35,910 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 20:56:35,911 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1] [2023-11-06 20:56:35,917 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc9a2cab-f97e-4c17-817c-8b80e925e1fd/bin/utaipan-verify-FOvIYxoinp/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-11-06 20:56:36,116 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc9a2cab-f97e-4c17-817c-8b80e925e1fd/bin/utaipan-verify-FOvIYxoinp/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-11-06 20:56:36,117 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-11-06 20:56:36,117 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 20:56:36,118 INFO L85 PathProgramCache]: Analyzing trace with hash 1574183170, now seen corresponding path program 6 times [2023-11-06 20:56:36,118 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-06 20:56:36,118 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1299752222] [2023-11-06 20:56:36,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 20:56:36,118 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 20:56:36,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 20:56:36,586 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 13 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 20:56:36,586 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-06 20:56:36,586 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1299752222] [2023-11-06 20:56:36,586 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1299752222] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 20:56:36,586 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1030144918] [2023-11-06 20:56:36,587 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-06 20:56:36,587 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 20:56:36,587 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc9a2cab-f97e-4c17-817c-8b80e925e1fd/bin/utaipan-verify-FOvIYxoinp/z3 [2023-11-06 20:56:36,588 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc9a2cab-f97e-4c17-817c-8b80e925e1fd/bin/utaipan-verify-FOvIYxoinp/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 20:56:36,592 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc9a2cab-f97e-4c17-817c-8b80e925e1fd/bin/utaipan-verify-FOvIYxoinp/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-06 20:56:36,686 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-06 20:56:36,686 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 20:56:36,688 INFO L262 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 40 conjunts are in the unsatisfiable core [2023-11-06 20:56:36,691 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 20:56:36,815 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 13 treesize of output 9 [2023-11-06 20:56:36,871 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 13 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 20:56:36,872 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 20:56:36,913 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 15 treesize of output 13 [2023-11-06 20:56:36,915 INFO L351 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 16 treesize of output 12 [2023-11-06 20:56:36,990 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 13 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 20:56:36,990 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1030144918] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 20:56:36,990 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [9909776] [2023-11-06 20:56:36,992 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2023-11-06 20:56:36,993 INFO L166 IcfgInterpreter]: Building call graph [2023-11-06 20:56:36,993 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-06 20:56:36,993 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-06 20:56:36,994 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-06 20:56:37,553 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-06 20:56:38,006 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1556#(and (<= 1 |#StackHeapBarrier|) (<= 2 |ULTIMATE.start_main_#t~malloc7#1.base|) (<= 1 |ULTIMATE.start_main_~length1~0#1|) (<= 2 |ULTIMATE.start_cstrreplace_~s#1.base|) (<= |ULTIMATE.start_main_#t~nondet10#1| 2147483647) (<= 2 |ULTIMATE.start_cstrreplace_#in~s#1.base|) (= |ULTIMATE.start_cstrreplace_~numReplaced~0#1| 0) (= |ULTIMATE.start_main_~nondetString1~0#1.offset| 0) (<= |ULTIMATE.start_main_#t~nondet11#1| 2147483647) (= |ULTIMATE.start_cstrreplace_#in~s#1.offset| 0) (<= (select |#length| |ULTIMATE.start_cstrreplace_~p~0#1.base|) |ULTIMATE.start_cstrreplace_~p~0#1.offset|) (<= 0 |ULTIMATE.start_cstrreplace_~p~0#1.offset|) (= |ULTIMATE.start_main_#t~malloc7#1.offset| 0) (= |ULTIMATE.start_cstrreplace_~s#1.offset| 0) (<= 2 |ULTIMATE.start_main_~nondetString1~0#1.base|) (<= 0 (+ 2147483648 |ULTIMATE.start_main_#t~nondet11#1|)) (<= 2 |ULTIMATE.start_cstrreplace_~p~0#1.base|) (<= 0 (+ 2147483648 |ULTIMATE.start_main_#t~nondet10#1|)))' at error location [2023-11-06 20:56:38,006 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-06 20:56:38,006 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 20:56:38,006 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 21 [2023-11-06 20:56:38,006 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [42325274] [2023-11-06 20:56:38,007 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 20:56:38,007 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-11-06 20:56:38,007 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-06 20:56:38,008 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-11-06 20:56:38,008 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=674, Unknown=0, NotChecked=0, Total=756 [2023-11-06 20:56:38,009 INFO L87 Difference]: Start difference. First operand 35 states and 40 transitions. Second operand has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 21 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 20:56:38,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 20:56:38,370 INFO L93 Difference]: Finished difference Result 59 states and 67 transitions. [2023-11-06 20:56:38,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-11-06 20:56:38,371 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 21 states have internal predecessors, (47), 0 states have call successors, (0), 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 30 [2023-11-06 20:56:38,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 20:56:38,372 INFO L225 Difference]: With dead ends: 59 [2023-11-06 20:56:38,372 INFO L226 Difference]: Without dead ends: 38 [2023-11-06 20:56:38,373 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 176 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=140, Invalid=1120, Unknown=0, NotChecked=0, Total=1260 [2023-11-06 20:56:38,374 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 30 mSDsluCounter, 125 mSDsCounter, 0 mSdLazyCounter, 313 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 135 SdHoareTripleChecker+Invalid, 319 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 313 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-06 20:56:38,374 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [30 Valid, 135 Invalid, 319 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 313 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-06 20:56:38,375 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2023-11-06 20:56:38,377 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 37. [2023-11-06 20:56:38,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 36 states have (on average 1.1666666666666667) internal successors, (42), 36 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) [2023-11-06 20:56:38,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 42 transitions. [2023-11-06 20:56:38,378 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 42 transitions. Word has length 30 [2023-11-06 20:56:38,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 20:56:38,379 INFO L495 AbstractCegarLoop]: Abstraction has 37 states and 42 transitions. [2023-11-06 20:56:38,379 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 21 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 20:56:38,379 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 42 transitions. [2023-11-06 20:56:38,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2023-11-06 20:56:38,380 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 20:56:38,380 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1] [2023-11-06 20:56:38,388 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc9a2cab-f97e-4c17-817c-8b80e925e1fd/bin/utaipan-verify-FOvIYxoinp/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2023-11-06 20:56:38,586 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc9a2cab-f97e-4c17-817c-8b80e925e1fd/bin/utaipan-verify-FOvIYxoinp/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-11-06 20:56:38,586 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-11-06 20:56:38,587 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 20:56:38,587 INFO L85 PathProgramCache]: Analyzing trace with hash 710763182, now seen corresponding path program 7 times [2023-11-06 20:56:38,587 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-06 20:56:38,587 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [474939037] [2023-11-06 20:56:38,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 20:56:38,587 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 20:56:38,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 20:56:39,061 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 9 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 20:56:39,062 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-06 20:56:39,063 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [474939037] [2023-11-06 20:56:39,063 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [474939037] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 20:56:39,063 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [866351440] [2023-11-06 20:56:39,063 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-06 20:56:39,063 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 20:56:39,064 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc9a2cab-f97e-4c17-817c-8b80e925e1fd/bin/utaipan-verify-FOvIYxoinp/z3 [2023-11-06 20:56:39,065 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc9a2cab-f97e-4c17-817c-8b80e925e1fd/bin/utaipan-verify-FOvIYxoinp/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 20:56:39,087 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc9a2cab-f97e-4c17-817c-8b80e925e1fd/bin/utaipan-verify-FOvIYxoinp/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-06 20:56:39,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 20:56:39,172 INFO L262 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 35 conjunts are in the unsatisfiable core [2023-11-06 20:56:39,174 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 20:56:39,376 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 9 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 20:56:39,376 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 20:56:39,607 INFO L351 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 5 treesize of output 3 [2023-11-06 20:56:39,694 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 9 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 20:56:39,695 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [866351440] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 20:56:39,695 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1386994667] [2023-11-06 20:56:39,700 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2023-11-06 20:56:39,700 INFO L166 IcfgInterpreter]: Building call graph [2023-11-06 20:56:39,700 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-06 20:56:39,701 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-06 20:56:39,701 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-06 20:56:40,246 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-06 20:56:40,688 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1885#(and (<= 1 |#StackHeapBarrier|) (<= 2 |ULTIMATE.start_main_#t~malloc7#1.base|) (<= 1 |ULTIMATE.start_main_~length1~0#1|) (<= 2 |ULTIMATE.start_cstrreplace_~s#1.base|) (<= |ULTIMATE.start_main_#t~nondet10#1| 2147483647) (<= 2 |ULTIMATE.start_cstrreplace_#in~s#1.base|) (= |ULTIMATE.start_cstrreplace_~numReplaced~0#1| 0) (= |ULTIMATE.start_main_~nondetString1~0#1.offset| 0) (<= |ULTIMATE.start_main_#t~nondet11#1| 2147483647) (= |ULTIMATE.start_cstrreplace_#in~s#1.offset| 0) (<= (select |#length| |ULTIMATE.start_cstrreplace_~p~0#1.base|) |ULTIMATE.start_cstrreplace_~p~0#1.offset|) (<= 0 |ULTIMATE.start_cstrreplace_~p~0#1.offset|) (= |ULTIMATE.start_main_#t~malloc7#1.offset| 0) (= |ULTIMATE.start_cstrreplace_~s#1.offset| 0) (<= 2 |ULTIMATE.start_main_~nondetString1~0#1.base|) (<= 0 (+ 2147483648 |ULTIMATE.start_main_#t~nondet11#1|)) (<= 2 |ULTIMATE.start_cstrreplace_~p~0#1.base|) (<= 0 (+ 2147483648 |ULTIMATE.start_main_#t~nondet10#1|)))' at error location [2023-11-06 20:56:40,688 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-06 20:56:40,689 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 20:56:40,689 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 11] total 23 [2023-11-06 20:56:40,689 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [698978989] [2023-11-06 20:56:40,689 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 20:56:40,689 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-11-06 20:56:40,690 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-06 20:56:40,690 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-11-06 20:56:40,691 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=809, Unknown=0, NotChecked=0, Total=930 [2023-11-06 20:56:40,691 INFO L87 Difference]: Start difference. First operand 37 states and 42 transitions. Second operand has 25 states, 24 states have (on average 2.9166666666666665) internal successors, (70), 24 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 20:56:41,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 20:56:41,112 INFO L93 Difference]: Finished difference Result 48 states and 55 transitions. [2023-11-06 20:56:41,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-11-06 20:56:41,113 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 24 states have (on average 2.9166666666666665) internal successors, (70), 24 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2023-11-06 20:56:41,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 20:56:41,114 INFO L225 Difference]: With dead ends: 48 [2023-11-06 20:56:41,114 INFO L226 Difference]: Without dead ends: 48 [2023-11-06 20:56:41,115 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 70 SyntacticMatches, 5 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 476 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=186, Invalid=1220, Unknown=0, NotChecked=0, Total=1406 [2023-11-06 20:56:41,115 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 94 mSDsluCounter, 108 mSDsCounter, 0 mSdLazyCounter, 275 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 94 SdHoareTripleChecker+Valid, 123 SdHoareTripleChecker+Invalid, 276 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 275 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-06 20:56:41,116 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [94 Valid, 123 Invalid, 276 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 275 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-06 20:56:41,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2023-11-06 20:56:41,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 43. [2023-11-06 20:56:41,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 42 states have (on average 1.1666666666666667) internal successors, (49), 42 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 20:56:41,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 49 transitions. [2023-11-06 20:56:41,120 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 49 transitions. Word has length 32 [2023-11-06 20:56:41,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 20:56:41,120 INFO L495 AbstractCegarLoop]: Abstraction has 43 states and 49 transitions. [2023-11-06 20:56:41,120 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 24 states have (on average 2.9166666666666665) internal successors, (70), 24 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 20:56:41,121 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 49 transitions. [2023-11-06 20:56:41,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2023-11-06 20:56:41,122 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 20:56:41,122 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 4, 4, 1, 1, 1, 1] [2023-11-06 20:56:41,133 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc9a2cab-f97e-4c17-817c-8b80e925e1fd/bin/utaipan-verify-FOvIYxoinp/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-11-06 20:56:41,328 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc9a2cab-f97e-4c17-817c-8b80e925e1fd/bin/utaipan-verify-FOvIYxoinp/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-11-06 20:56:41,328 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-11-06 20:56:41,329 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 20:56:41,329 INFO L85 PathProgramCache]: Analyzing trace with hash 715403607, now seen corresponding path program 8 times [2023-11-06 20:56:41,329 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-06 20:56:41,329 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [396768690] [2023-11-06 20:56:41,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 20:56:41,329 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 20:56:41,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 20:56:41,863 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 17 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 20:56:41,863 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-06 20:56:41,863 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [396768690] [2023-11-06 20:56:41,863 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [396768690] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 20:56:41,863 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2023697613] [2023-11-06 20:56:41,863 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-06 20:56:41,864 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 20:56:41,864 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc9a2cab-f97e-4c17-817c-8b80e925e1fd/bin/utaipan-verify-FOvIYxoinp/z3 [2023-11-06 20:56:41,865 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc9a2cab-f97e-4c17-817c-8b80e925e1fd/bin/utaipan-verify-FOvIYxoinp/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 20:56:41,884 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc9a2cab-f97e-4c17-817c-8b80e925e1fd/bin/utaipan-verify-FOvIYxoinp/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-06 20:56:41,992 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2023-11-06 20:56:41,992 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 20:56:41,995 INFO L262 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 35 conjunts are in the unsatisfiable core [2023-11-06 20:56:41,997 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 20:56:42,009 INFO L351 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 [2023-11-06 20:56:42,145 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 17 treesize of output 13 [2023-11-06 20:56:42,755 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 20:56:42,756 INFO L351 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 21 treesize of output 22 [2023-11-06 20:56:43,042 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2023-11-06 20:56:43,043 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 20:56:43,340 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 17 treesize of output 15 [2023-11-06 20:56:43,347 INFO L351 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 26 treesize of output 20 [2023-11-06 20:56:43,527 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 4 proven. 21 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2023-11-06 20:56:43,527 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2023697613] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 20:56:43,528 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1812336966] [2023-11-06 20:56:43,530 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2023-11-06 20:56:43,530 INFO L166 IcfgInterpreter]: Building call graph [2023-11-06 20:56:43,530 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-06 20:56:43,531 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-06 20:56:43,531 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-06 20:56:44,032 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-06 20:56:44,542 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2241#(and (<= 1 |#StackHeapBarrier|) (<= 2 |ULTIMATE.start_main_#t~malloc7#1.base|) (<= 1 |ULTIMATE.start_main_~length1~0#1|) (<= 2 |ULTIMATE.start_cstrreplace_~s#1.base|) (<= |ULTIMATE.start_main_#t~nondet10#1| 2147483647) (<= 2 |ULTIMATE.start_cstrreplace_#in~s#1.base|) (= |ULTIMATE.start_cstrreplace_~numReplaced~0#1| 0) (= |ULTIMATE.start_main_~nondetString1~0#1.offset| 0) (<= |ULTIMATE.start_main_#t~nondet11#1| 2147483647) (= |ULTIMATE.start_cstrreplace_#in~s#1.offset| 0) (<= (select |#length| |ULTIMATE.start_cstrreplace_~p~0#1.base|) |ULTIMATE.start_cstrreplace_~p~0#1.offset|) (<= 0 |ULTIMATE.start_cstrreplace_~p~0#1.offset|) (= |ULTIMATE.start_main_#t~malloc7#1.offset| 0) (= |ULTIMATE.start_cstrreplace_~s#1.offset| 0) (<= 2 |ULTIMATE.start_main_~nondetString1~0#1.base|) (<= 0 (+ 2147483648 |ULTIMATE.start_main_#t~nondet11#1|)) (<= 2 |ULTIMATE.start_cstrreplace_~p~0#1.base|) (<= 0 (+ 2147483648 |ULTIMATE.start_main_#t~nondet10#1|)))' at error location [2023-11-06 20:56:44,542 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-06 20:56:44,542 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 20:56:44,543 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 7, 7] total 28 [2023-11-06 20:56:44,543 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [980549094] [2023-11-06 20:56:44,543 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 20:56:44,544 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-11-06 20:56:44,544 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-06 20:56:44,544 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-11-06 20:56:44,545 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=1091, Unknown=0, NotChecked=0, Total=1190 [2023-11-06 20:56:44,546 INFO L87 Difference]: Start difference. First operand 43 states and 49 transitions. Second operand has 29 states, 29 states have (on average 2.4482758620689653) internal successors, (71), 28 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)