./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/termination-recursive-malloc/selectionSort_recursive.i --full-output --architecture 64bit -------------------------------------------------------------------------------- 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_5a2dadde-11b6-4dbe-b567-a97f271b829d/bin/utaipan-verify-FOvIYxoinp/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a2dadde-11b6-4dbe-b567-a97f271b829d/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_5a2dadde-11b6-4dbe-b567-a97f271b829d/bin/utaipan-verify-FOvIYxoinp/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a2dadde-11b6-4dbe-b567-a97f271b829d/bin/utaipan-verify-FOvIYxoinp/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/termination-recursive-malloc/selectionSort_recursive.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a2dadde-11b6-4dbe-b567-a97f271b829d/bin/utaipan-verify-FOvIYxoinp/config/svcomp-DerefFreeMemtrack-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a2dadde-11b6-4dbe-b567-a97f271b829d/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 64bit --witnessprinter.graph.data.programhash ff7f98b41a2da3578e790df894a867e943a0857e97661a8032b524a76ca3b438 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-e7bb482 [2023-11-06 20:29:29,563 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-06 20:29:29,651 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a2dadde-11b6-4dbe-b567-a97f271b829d/bin/utaipan-verify-FOvIYxoinp/config/svcomp-DerefFreeMemtrack-64bit-Taipan_Default.epf [2023-11-06 20:29:29,658 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-06 20:29:29,659 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-06 20:29:29,691 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-06 20:29:29,692 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-06 20:29:29,693 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-06 20:29:29,694 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-06 20:29:29,695 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-06 20:29:29,695 INFO L153 SettingsManager]: * User list type=DISABLED [2023-11-06 20:29:29,696 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-11-06 20:29:29,697 INFO L153 SettingsManager]: * Explicit value domain=true [2023-11-06 20:29:29,697 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-11-06 20:29:29,698 INFO L153 SettingsManager]: * Octagon Domain=false [2023-11-06 20:29:29,699 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-11-06 20:29:29,699 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-11-06 20:29:29,700 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-11-06 20:29:29,701 INFO L153 SettingsManager]: * Interval Domain=false [2023-11-06 20:29:29,702 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-11-06 20:29:29,702 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-11-06 20:29:29,703 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-11-06 20:29:29,704 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-06 20:29:29,705 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-06 20:29:29,706 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-06 20:29:29,707 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-06 20:29:29,707 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-06 20:29:29,708 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-11-06 20:29:29,709 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2023-11-06 20:29:29,709 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-11-06 20:29:29,710 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-06 20:29:29,710 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-11-06 20:29:29,711 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-06 20:29:29,712 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-06 20:29:29,712 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-06 20:29:29,713 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-06 20:29:29,713 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-06 20:29:29,714 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-06 20:29:29,714 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-06 20:29:29,715 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-11-06 20:29:29,716 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-06 20:29:29,716 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-11-06 20:29:29,717 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-06 20:29:29,717 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_5a2dadde-11b6-4dbe-b567-a97f271b829d/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a2dadde-11b6-4dbe-b567-a97f271b829d/bin/utaipan-verify-FOvIYxoinp Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> ff7f98b41a2da3578e790df894a867e943a0857e97661a8032b524a76ca3b438 [2023-11-06 20:29:30,010 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-06 20:29:30,044 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-06 20:29:30,047 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-06 20:29:30,049 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-06 20:29:30,049 INFO L274 PluginConnector]: CDTParser initialized [2023-11-06 20:29:30,051 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a2dadde-11b6-4dbe-b567-a97f271b829d/bin/utaipan-verify-FOvIYxoinp/../../sv-benchmarks/c/termination-recursive-malloc/selectionSort_recursive.i [2023-11-06 20:29:33,436 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-06 20:29:33,644 INFO L384 CDTParser]: Found 1 translation units. [2023-11-06 20:29:33,645 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a2dadde-11b6-4dbe-b567-a97f271b829d/sv-benchmarks/c/termination-recursive-malloc/selectionSort_recursive.i [2023-11-06 20:29:33,653 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a2dadde-11b6-4dbe-b567-a97f271b829d/bin/utaipan-verify-FOvIYxoinp/data/fc41e5f7c/ba406b1caf6c425e9737ce4ba758731b/FLAG502c14c4c [2023-11-06 20:29:33,666 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a2dadde-11b6-4dbe-b567-a97f271b829d/bin/utaipan-verify-FOvIYxoinp/data/fc41e5f7c/ba406b1caf6c425e9737ce4ba758731b [2023-11-06 20:29:33,669 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-06 20:29:33,671 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-06 20:29:33,672 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-06 20:29:33,672 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-06 20:29:33,678 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-06 20:29:33,679 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 08:29:33" (1/1) ... [2023-11-06 20:29:33,680 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6660ca42 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 08:29:33, skipping insertion in model container [2023-11-06 20:29:33,680 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 08:29:33" (1/1) ... [2023-11-06 20:29:33,700 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-06 20:29:33,859 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-06 20:29:33,869 INFO L202 MainTranslator]: Completed pre-run [2023-11-06 20:29:33,886 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-06 20:29:33,901 INFO L206 MainTranslator]: Completed translation [2023-11-06 20:29:33,902 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 08:29:33 WrapperNode [2023-11-06 20:29:33,902 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-06 20:29:33,904 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-06 20:29:33,904 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-06 20:29:33,904 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-06 20:29:33,912 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 08:29:33" (1/1) ... [2023-11-06 20:29:33,922 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 08:29:33" (1/1) ... [2023-11-06 20:29:33,951 INFO L138 Inliner]: procedures = 11, calls = 13, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 34 [2023-11-06 20:29:33,951 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-06 20:29:33,952 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-06 20:29:33,952 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-06 20:29:33,953 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-06 20:29:33,962 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 08:29:33" (1/1) ... [2023-11-06 20:29:33,962 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 08:29:33" (1/1) ... [2023-11-06 20:29:33,964 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 08:29:33" (1/1) ... [2023-11-06 20:29:33,965 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 08:29:33" (1/1) ... [2023-11-06 20:29:33,971 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 08:29:33" (1/1) ... [2023-11-06 20:29:33,976 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 08:29:33" (1/1) ... [2023-11-06 20:29:33,977 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 08:29:33" (1/1) ... [2023-11-06 20:29:33,978 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 08:29:33" (1/1) ... [2023-11-06 20:29:33,980 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-06 20:29:33,982 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-06 20:29:33,982 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-06 20:29:33,982 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-06 20:29:33,983 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 08:29:33" (1/1) ... [2023-11-06 20:29:33,995 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-06 20:29:34,006 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a2dadde-11b6-4dbe-b567-a97f271b829d/bin/utaipan-verify-FOvIYxoinp/z3 [2023-11-06 20:29:34,023 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a2dadde-11b6-4dbe-b567-a97f271b829d/bin/utaipan-verify-FOvIYxoinp/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-06 20:29:34,026 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a2dadde-11b6-4dbe-b567-a97f271b829d/bin/utaipan-verify-FOvIYxoinp/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-06 20:29:34,058 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-06 20:29:34,058 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-06 20:29:34,059 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-06 20:29:34,059 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-06 20:29:34,059 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-06 20:29:34,059 INFO L130 BoogieDeclarations]: Found specification of procedure selectionSort [2023-11-06 20:29:34,059 INFO L138 BoogieDeclarations]: Found implementation of procedure selectionSort [2023-11-06 20:29:34,059 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-06 20:29:34,134 INFO L236 CfgBuilder]: Building ICFG [2023-11-06 20:29:34,136 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-06 20:29:34,416 INFO L277 CfgBuilder]: Performing block encoding [2023-11-06 20:29:34,471 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-06 20:29:34,471 INFO L302 CfgBuilder]: Removed 2 assume(true) statements. [2023-11-06 20:29:34,474 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 08:29:34 BoogieIcfgContainer [2023-11-06 20:29:34,474 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-06 20:29:34,477 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-06 20:29:34,478 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-06 20:29:34,481 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-06 20:29:34,481 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 08:29:33" (1/3) ... [2023-11-06 20:29:34,482 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7180e4ca and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 08:29:34, skipping insertion in model container [2023-11-06 20:29:34,483 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 08:29:33" (2/3) ... [2023-11-06 20:29:34,483 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7180e4ca and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 08:29:34, skipping insertion in model container [2023-11-06 20:29:34,483 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 08:29:34" (3/3) ... [2023-11-06 20:29:34,485 INFO L112 eAbstractionObserver]: Analyzing ICFG selectionSort_recursive.i [2023-11-06 20:29:34,506 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-06 20:29:34,506 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 18 error locations. [2023-11-06 20:29:34,547 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-06 20:29:34,554 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;@24742fa1, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-06 20:29:34,555 INFO L358 AbstractCegarLoop]: Starting to check reachability of 18 error locations. [2023-11-06 20:29:34,568 INFO L276 IsEmpty]: Start isEmpty. Operand has 40 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 37 states have internal predecessors, (40), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-06 20:29:34,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2023-11-06 20:29:34,574 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 20:29:34,575 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2023-11-06 20:29:34,576 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_FREE (and 15 more)] === [2023-11-06 20:29:34,580 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 20:29:34,581 INFO L85 PathProgramCache]: Analyzing trace with hash 114548, now seen corresponding path program 1 times [2023-11-06 20:29:34,589 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-06 20:29:34,589 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2000951910] [2023-11-06 20:29:34,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 20:29:34,590 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 20:29:34,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 20:29:34,785 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 20:29:34,786 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-06 20:29:34,787 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2000951910] [2023-11-06 20:29:34,787 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2000951910] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 20:29:34,788 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 20:29:34,788 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-06 20:29:34,795 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2074469628] [2023-11-06 20:29:34,796 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 20:29:34,799 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 20:29:34,799 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-06 20:29:34,830 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 20:29:34,830 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 20:29:34,832 INFO L87 Difference]: Start difference. First operand has 40 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 37 states have internal predecessors, (40), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) 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 20:29:34,898 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 20:29:34,898 INFO L93 Difference]: Finished difference Result 41 states and 45 transitions. [2023-11-06 20:29:34,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 20:29:34,901 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 20:29:34,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 20:29:34,908 INFO L225 Difference]: With dead ends: 41 [2023-11-06 20:29:34,908 INFO L226 Difference]: Without dead ends: 39 [2023-11-06 20:29:34,910 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 20:29:34,914 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 1 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 56 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 20:29:34,915 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 56 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-06 20:29:34,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2023-11-06 20:29:34,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2023-11-06 20:29:34,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 18 states have (on average 2.111111111111111) internal successors, (38), 36 states have internal predecessors, (38), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-06 20:29:34,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 42 transitions. [2023-11-06 20:29:34,953 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 42 transitions. Word has length 3 [2023-11-06 20:29:34,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 20:29:34,954 INFO L495 AbstractCegarLoop]: Abstraction has 39 states and 42 transitions. [2023-11-06 20:29:34,954 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 20:29:34,954 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 42 transitions. [2023-11-06 20:29:34,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2023-11-06 20:29:34,955 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 20:29:34,955 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2023-11-06 20:29:34,956 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-06 20:29:34,956 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_FREE (and 15 more)] === [2023-11-06 20:29:34,957 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 20:29:34,957 INFO L85 PathProgramCache]: Analyzing trace with hash 3552338, now seen corresponding path program 1 times [2023-11-06 20:29:34,957 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-06 20:29:34,958 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [488732878] [2023-11-06 20:29:34,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 20:29:34,958 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 20:29:34,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 20:29:35,048 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 20:29:35,048 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-06 20:29:35,049 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [488732878] [2023-11-06 20:29:35,049 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [488732878] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 20:29:35,049 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 20:29:35,049 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-06 20:29:35,050 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1735087151] [2023-11-06 20:29:35,050 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 20:29:35,051 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 20:29:35,051 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-06 20:29:35,052 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 20:29:35,052 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 20:29:35,053 INFO L87 Difference]: Start difference. First operand 39 states and 42 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 20:29:35,099 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 20:29:35,099 INFO L93 Difference]: Finished difference Result 37 states and 40 transitions. [2023-11-06 20:29:35,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 20:29:35,100 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 20:29:35,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 20:29:35,101 INFO L225 Difference]: With dead ends: 37 [2023-11-06 20:29:35,101 INFO L226 Difference]: Without dead ends: 37 [2023-11-06 20:29:35,102 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 20:29:35,104 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 7 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-06 20:29:35,105 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 42 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-06 20:29:35,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2023-11-06 20:29:35,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2023-11-06 20:29:35,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 18 states have (on average 2.0) internal successors, (36), 34 states have internal predecessors, (36), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-06 20:29:35,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 40 transitions. [2023-11-06 20:29:35,112 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 40 transitions. Word has length 4 [2023-11-06 20:29:35,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 20:29:35,113 INFO L495 AbstractCegarLoop]: Abstraction has 37 states and 40 transitions. [2023-11-06 20:29:35,113 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 20:29:35,113 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 40 transitions. [2023-11-06 20:29:35,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2023-11-06 20:29:35,114 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 20:29:35,114 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2023-11-06 20:29:35,114 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-06 20:29:35,115 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_FREE (and 15 more)] === [2023-11-06 20:29:35,115 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 20:29:35,115 INFO L85 PathProgramCache]: Analyzing trace with hash 3552339, now seen corresponding path program 1 times [2023-11-06 20:29:35,116 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-06 20:29:35,116 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1959859463] [2023-11-06 20:29:35,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 20:29:35,117 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 20:29:35,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 20:29:35,476 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 20:29:35,476 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-06 20:29:35,477 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1959859463] [2023-11-06 20:29:35,477 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1959859463] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 20:29:35,477 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 20:29:35,477 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-06 20:29:35,478 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1319780621] [2023-11-06 20:29:35,478 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 20:29:35,478 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-06 20:29:35,479 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-06 20:29:35,479 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-06 20:29:35,480 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-06 20:29:35,480 INFO L87 Difference]: Start difference. First operand 37 states and 40 transitions. Second operand has 5 states, 4 states have (on average 1.0) internal successors, (4), 4 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 20:29:35,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 20:29:35,650 INFO L93 Difference]: Finished difference Result 39 states and 42 transitions. [2023-11-06 20:29:35,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-06 20:29:35,652 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 1.0) internal successors, (4), 4 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 20:29:35,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 20:29:35,654 INFO L225 Difference]: With dead ends: 39 [2023-11-06 20:29:35,654 INFO L226 Difference]: Without dead ends: 39 [2023-11-06 20:29:35,657 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-06 20:29:35,659 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 13 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 71 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-06 20:29:35,660 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 71 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-06 20:29:35,661 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2023-11-06 20:29:35,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2023-11-06 20:29:35,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 20 states have (on average 1.9) internal successors, (38), 36 states have internal predecessors, (38), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-06 20:29:35,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 42 transitions. [2023-11-06 20:29:35,667 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 42 transitions. Word has length 4 [2023-11-06 20:29:35,668 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 20:29:35,668 INFO L495 AbstractCegarLoop]: Abstraction has 39 states and 42 transitions. [2023-11-06 20:29:35,668 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 1.0) internal successors, (4), 4 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 20:29:35,668 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 42 transitions. [2023-11-06 20:29:35,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2023-11-06 20:29:35,669 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 20:29:35,669 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1] [2023-11-06 20:29:35,669 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-06 20:29:35,670 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_FREE (and 15 more)] === [2023-11-06 20:29:35,670 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 20:29:35,671 INFO L85 PathProgramCache]: Analyzing trace with hash -881099842, now seen corresponding path program 1 times [2023-11-06 20:29:35,671 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-06 20:29:35,671 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [773737844] [2023-11-06 20:29:35,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 20:29:35,675 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 20:29:35,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 20:29:36,063 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 20:29:36,063 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-06 20:29:36,064 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [773737844] [2023-11-06 20:29:36,064 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [773737844] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 20:29:36,064 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [458953996] [2023-11-06 20:29:36,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 20:29:36,065 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 20:29:36,065 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a2dadde-11b6-4dbe-b567-a97f271b829d/bin/utaipan-verify-FOvIYxoinp/z3 [2023-11-06 20:29:36,080 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a2dadde-11b6-4dbe-b567-a97f271b829d/bin/utaipan-verify-FOvIYxoinp/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 20:29:36,096 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a2dadde-11b6-4dbe-b567-a97f271b829d/bin/utaipan-verify-FOvIYxoinp/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-06 20:29:36,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 20:29:36,159 INFO L262 TraceCheckSpWp]: Trace formula consists of 40 conjuncts, 11 conjunts are in the unsatisfiable core [2023-11-06 20:29:36,166 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 20:29:36,258 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 10 treesize of output 9 [2023-11-06 20:29:36,536 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 20:29:36,536 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 20:29:36,798 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 20:29:36,799 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [458953996] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 20:29:36,805 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1993846425] [2023-11-06 20:29:36,830 INFO L159 IcfgInterpreter]: Started Sifa with 5 locations of interest [2023-11-06 20:29:36,831 INFO L166 IcfgInterpreter]: Building call graph [2023-11-06 20:29:36,837 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-06 20:29:36,844 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-06 20:29:36,845 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-06 20:29:37,310 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-06 20:29:37,497 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '330#(and (<= |ULTIMATE.start_main_~n~0#1| 2147483647) (<= 1 |#StackHeapBarrier|) (= |ULTIMATE.start_main_~a~0#1.offset| 0) (<= 0 (+ 2147483648 |ULTIMATE.start_main_#t~nondet9#1|)) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= |ULTIMATE.start_main_#t~nondet9#1| 2147483647) (<= 1 |ULTIMATE.start_main_~n~0#1|) (<= (select |#length| |ULTIMATE.start_main_~a~0#1.base|) (+ 3 (* |ULTIMATE.start_main_~i~0#1| 4))))' at error location [2023-11-06 20:29:37,497 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-06 20:29:37,498 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 20:29:37,498 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 12 [2023-11-06 20:29:37,498 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [151054350] [2023-11-06 20:29:37,499 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 20:29:37,499 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-06 20:29:37,499 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-06 20:29:37,500 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-06 20:29:37,501 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=228, Unknown=0, NotChecked=0, Total=306 [2023-11-06 20:29:37,501 INFO L87 Difference]: Start difference. First operand 39 states and 42 transitions. Second operand has 14 states, 13 states have (on average 1.3846153846153846) internal successors, (18), 13 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 20:29:37,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 20:29:37,781 INFO L93 Difference]: Finished difference Result 38 states and 41 transitions. [2023-11-06 20:29:37,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-06 20:29:37,783 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 1.3846153846153846) internal successors, (18), 13 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) Word has length 6 [2023-11-06 20:29:37,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 20:29:37,784 INFO L225 Difference]: With dead ends: 38 [2023-11-06 20:29:37,784 INFO L226 Difference]: Without dead ends: 38 [2023-11-06 20:29:37,785 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=101, Invalid=279, Unknown=0, NotChecked=0, Total=380 [2023-11-06 20:29:37,786 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 23 mSDsluCounter, 86 mSDsCounter, 0 mSdLazyCounter, 118 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 116 SdHoareTripleChecker+Invalid, 121 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 118 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-06 20:29:37,786 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 116 Invalid, 121 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 118 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-06 20:29:37,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2023-11-06 20:29:37,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 37. [2023-11-06 20:29:37,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 19 states have (on average 1.894736842105263) internal successors, (36), 34 states have internal predecessors, (36), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-06 20:29:37,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 40 transitions. [2023-11-06 20:29:37,803 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 40 transitions. Word has length 6 [2023-11-06 20:29:37,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 20:29:37,804 INFO L495 AbstractCegarLoop]: Abstraction has 37 states and 40 transitions. [2023-11-06 20:29:37,804 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 1.3846153846153846) internal successors, (18), 13 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 20:29:37,804 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 40 transitions. [2023-11-06 20:29:37,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2023-11-06 20:29:37,805 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 20:29:37,806 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 20:29:37,818 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a2dadde-11b6-4dbe-b567-a97f271b829d/bin/utaipan-verify-FOvIYxoinp/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-06 20:29:38,013 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a2dadde-11b6-4dbe-b567-a97f271b829d/bin/utaipan-verify-FOvIYxoinp/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 20:29:38,014 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting selectionSortErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_FREE (and 15 more)] === [2023-11-06 20:29:38,015 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 20:29:38,015 INFO L85 PathProgramCache]: Analyzing trace with hash -122164623, now seen corresponding path program 1 times [2023-11-06 20:29:38,015 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-06 20:29:38,015 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [43909307] [2023-11-06 20:29:38,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 20:29:38,016 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 20:29:38,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 20:29:38,161 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 20:29:38,161 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-06 20:29:38,161 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [43909307] [2023-11-06 20:29:38,164 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [43909307] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 20:29:38,165 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 20:29:38,165 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-06 20:29:38,168 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [766390921] [2023-11-06 20:29:38,168 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 20:29:38,170 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-06 20:29:38,170 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-06 20:29:38,171 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-06 20:29:38,171 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-06 20:29:38,172 INFO L87 Difference]: Start difference. First operand 37 states and 40 transitions. Second operand has 5 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 20:29:38,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 20:29:38,262 INFO L93 Difference]: Finished difference Result 31 states and 34 transitions. [2023-11-06 20:29:38,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-06 20:29:38,263 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2023-11-06 20:29:38,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 20:29:38,265 INFO L225 Difference]: With dead ends: 31 [2023-11-06 20:29:38,266 INFO L226 Difference]: Without dead ends: 31 [2023-11-06 20:29:38,266 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-11-06 20:29:38,268 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 38 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 62 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 71 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 62 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-06 20:29:38,269 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [39 Valid, 21 Invalid, 71 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 62 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-06 20:29:38,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2023-11-06 20:29:38,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2023-11-06 20:29:38,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 28 states have internal predecessors, (30), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-06 20:29:38,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 34 transitions. [2023-11-06 20:29:38,286 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 34 transitions. Word has length 10 [2023-11-06 20:29:38,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 20:29:38,286 INFO L495 AbstractCegarLoop]: Abstraction has 31 states and 34 transitions. [2023-11-06 20:29:38,287 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 20:29:38,287 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 34 transitions. [2023-11-06 20:29:38,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2023-11-06 20:29:38,288 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 20:29:38,288 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 20:29:38,288 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-06 20:29:38,290 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting selectionSortErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_FREE (and 15 more)] === [2023-11-06 20:29:38,291 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 20:29:38,294 INFO L85 PathProgramCache]: Analyzing trace with hash -122164622, now seen corresponding path program 1 times [2023-11-06 20:29:38,295 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-06 20:29:38,295 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [710714358] [2023-11-06 20:29:38,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 20:29:38,296 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 20:29:38,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 20:29:38,449 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 20:29:38,449 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-06 20:29:38,450 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [710714358] [2023-11-06 20:29:38,456 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [710714358] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 20:29:38,456 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1607239003] [2023-11-06 20:29:38,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 20:29:38,457 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 20:29:38,457 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a2dadde-11b6-4dbe-b567-a97f271b829d/bin/utaipan-verify-FOvIYxoinp/z3 [2023-11-06 20:29:38,458 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a2dadde-11b6-4dbe-b567-a97f271b829d/bin/utaipan-verify-FOvIYxoinp/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 20:29:38,465 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a2dadde-11b6-4dbe-b567-a97f271b829d/bin/utaipan-verify-FOvIYxoinp/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-06 20:29:38,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 20:29:38,544 INFO L262 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-06 20:29:38,546 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 20:29:38,627 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 20:29:38,628 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 20:29:38,701 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 20:29:38,701 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1607239003] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 20:29:38,702 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [867905700] [2023-11-06 20:29:38,704 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2023-11-06 20:29:38,705 INFO L166 IcfgInterpreter]: Building call graph [2023-11-06 20:29:38,705 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-06 20:29:38,706 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-06 20:29:38,706 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-06 20:29:38,963 INFO L197 IcfgInterpreter]: Interpreting procedure selectionSort with input of size 16 for LOIs [2023-11-06 20:29:38,994 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-06 20:29:39,378 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '548#(and (= selectionSort_~size |selectionSort_#in~size|) (<= |selectionSort_#in~size| 2147483647) (<= 1 |#StackHeapBarrier|) (= selectionSort_~array.offset 0) (<= (select |#length| selectionSort_~array.base) 7) (= 0 selectionSort_~minIndex~0) (= |#memory_int| |old(#memory_int)|) (= selectionSort_~array.base |selectionSort_#in~array.base|) (= |selectionSort_#in~startIndex| 0) (= |selectionSort_#in~array.offset| 0) (<= 2 selectionSort_~size) (= selectionSort_~index~0 1) (= selectionSort_~startIndex 0))' at error location [2023-11-06 20:29:39,378 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-06 20:29:39,378 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 20:29:39,379 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 12 [2023-11-06 20:29:39,379 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1155398093] [2023-11-06 20:29:39,379 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 20:29:39,380 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-06 20:29:39,381 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-06 20:29:39,382 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-06 20:29:39,382 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=325, Unknown=0, NotChecked=0, Total=380 [2023-11-06 20:29:39,383 INFO L87 Difference]: Start difference. First operand 31 states and 34 transitions. Second operand has 12 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 9 states have internal predecessors, (16), 1 states have call successors, (3), 3 states have call predecessors, (3), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 20:29:39,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 20:29:39,519 INFO L93 Difference]: Finished difference Result 48 states and 52 transitions. [2023-11-06 20:29:39,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-06 20:29:39,521 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 9 states have internal predecessors, (16), 1 states have call successors, (3), 3 states have call predecessors, (3), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2023-11-06 20:29:39,522 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 20:29:39,527 INFO L225 Difference]: With dead ends: 48 [2023-11-06 20:29:39,527 INFO L226 Difference]: Without dead ends: 48 [2023-11-06 20:29:39,528 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 14 SyntacticMatches, 3 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=63, Invalid=357, Unknown=0, NotChecked=0, Total=420 [2023-11-06 20:29:39,531 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 13 mSDsluCounter, 122 mSDsCounter, 0 mSdLazyCounter, 89 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 144 SdHoareTripleChecker+Invalid, 90 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 89 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-06 20:29:39,531 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 144 Invalid, 90 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 89 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-06 20:29:39,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2023-11-06 20:29:39,546 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 38. [2023-11-06 20:29:39,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 24 states have (on average 1.5) internal successors, (36), 34 states have internal predecessors, (36), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-06 20:29:39,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 42 transitions. [2023-11-06 20:29:39,552 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 42 transitions. Word has length 10 [2023-11-06 20:29:39,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 20:29:39,553 INFO L495 AbstractCegarLoop]: Abstraction has 38 states and 42 transitions. [2023-11-06 20:29:39,555 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 9 states have internal predecessors, (16), 1 states have call successors, (3), 3 states have call predecessors, (3), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 20:29:39,555 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 42 transitions. [2023-11-06 20:29:39,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2023-11-06 20:29:39,556 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 20:29:39,556 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 20:29:39,567 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a2dadde-11b6-4dbe-b567-a97f271b829d/bin/utaipan-verify-FOvIYxoinp/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-11-06 20:29:39,762 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a2dadde-11b6-4dbe-b567-a97f271b829d/bin/utaipan-verify-FOvIYxoinp/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2023-11-06 20:29:39,763 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_FREE (and 15 more)] === [2023-11-06 20:29:39,763 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 20:29:39,764 INFO L85 PathProgramCache]: Analyzing trace with hash 507866955, now seen corresponding path program 1 times [2023-11-06 20:29:39,765 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-06 20:29:39,765 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [78653258] [2023-11-06 20:29:39,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 20:29:39,766 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 20:29:39,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 20:29:39,816 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 20:29:39,816 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-06 20:29:39,817 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [78653258] [2023-11-06 20:29:39,817 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [78653258] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 20:29:39,817 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 20:29:39,817 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-06 20:29:39,818 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [839585543] [2023-11-06 20:29:39,818 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 20:29:39,818 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 20:29:39,818 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-06 20:29:39,819 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 20:29:39,820 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 20:29:39,820 INFO L87 Difference]: Start difference. First operand 38 states and 42 transitions. Second operand has 3 states, 2 states have (on average 4.5) internal successors, (9), 3 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-06 20:29:39,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 20:29:39,844 INFO L93 Difference]: Finished difference Result 37 states and 41 transitions. [2023-11-06 20:29:39,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 20:29:39,845 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 4.5) internal successors, (9), 3 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2023-11-06 20:29:39,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 20:29:39,846 INFO L225 Difference]: With dead ends: 37 [2023-11-06 20:29:39,847 INFO L226 Difference]: Without dead ends: 37 [2023-11-06 20:29:39,847 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 20:29:39,848 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 5 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-06 20:29:39,848 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 41 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-06 20:29:39,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2023-11-06 20:29:39,853 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2023-11-06 20:29:39,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 33 states have internal predecessors, (35), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-06 20:29:39,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 41 transitions. [2023-11-06 20:29:39,854 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 41 transitions. Word has length 11 [2023-11-06 20:29:39,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 20:29:39,855 INFO L495 AbstractCegarLoop]: Abstraction has 37 states and 41 transitions. [2023-11-06 20:29:39,855 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 4.5) internal successors, (9), 3 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-06 20:29:39,855 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 41 transitions. [2023-11-06 20:29:39,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2023-11-06 20:29:39,856 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 20:29:39,856 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 20:29:39,856 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-11-06 20:29:39,857 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_FREE (and 15 more)] === [2023-11-06 20:29:39,857 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 20:29:39,857 INFO L85 PathProgramCache]: Analyzing trace with hash -1435993519, now seen corresponding path program 1 times [2023-11-06 20:29:39,858 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-06 20:29:39,858 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1507848803] [2023-11-06 20:29:39,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 20:29:39,858 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 20:29:39,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 20:29:39,889 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 20:29:39,889 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-06 20:29:39,889 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1507848803] [2023-11-06 20:29:39,890 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1507848803] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 20:29:39,890 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 20:29:39,890 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-06 20:29:39,890 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [124342236] [2023-11-06 20:29:39,891 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 20:29:39,891 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 20:29:39,891 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-06 20:29:39,892 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 20:29:39,892 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 20:29:39,892 INFO L87 Difference]: Start difference. First operand 37 states and 41 transitions. Second operand has 3 states, 2 states have (on average 5.0) internal successors, (10), 3 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-06 20:29:39,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 20:29:39,921 INFO L93 Difference]: Finished difference Result 36 states and 40 transitions. [2023-11-06 20:29:39,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 20:29:39,922 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 5.0) internal successors, (10), 3 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2023-11-06 20:29:39,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 20:29:39,924 INFO L225 Difference]: With dead ends: 36 [2023-11-06 20:29:39,924 INFO L226 Difference]: Without dead ends: 36 [2023-11-06 20:29:39,924 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 20:29:39,925 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 3 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-06 20:29:39,926 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 38 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-06 20:29:39,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2023-11-06 20:29:39,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2023-11-06 20:29:39,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 32 states have internal predecessors, (34), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-06 20:29:39,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 40 transitions. [2023-11-06 20:29:39,932 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 40 transitions. Word has length 12 [2023-11-06 20:29:39,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 20:29:39,933 INFO L495 AbstractCegarLoop]: Abstraction has 36 states and 40 transitions. [2023-11-06 20:29:39,933 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 5.0) internal successors, (10), 3 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-06 20:29:39,933 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 40 transitions. [2023-11-06 20:29:39,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2023-11-06 20:29:39,934 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 20:29:39,935 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 20:29:39,935 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-11-06 20:29:39,935 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting selectionSortErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_FREE (and 15 more)] === [2023-11-06 20:29:39,936 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 20:29:39,936 INFO L85 PathProgramCache]: Analyzing trace with hash 1927722397, now seen corresponding path program 2 times [2023-11-06 20:29:39,937 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-06 20:29:39,937 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1892568493] [2023-11-06 20:29:39,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 20:29:39,938 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 20:29:39,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 20:29:40,244 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-06 20:29:40,244 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-06 20:29:40,244 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1892568493] [2023-11-06 20:29:40,245 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1892568493] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 20:29:40,245 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 20:29:40,245 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-11-06 20:29:40,245 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [459916609] [2023-11-06 20:29:40,246 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 20:29:40,246 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-06 20:29:40,246 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-06 20:29:40,247 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-06 20:29:40,247 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2023-11-06 20:29:40,248 INFO L87 Difference]: Start difference. First operand 36 states and 40 transitions. Second operand has 9 states, 7 states have (on average 1.4285714285714286) internal successors, (10), 8 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 20:29:40,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 20:29:40,523 INFO L93 Difference]: Finished difference Result 54 states and 61 transitions. [2023-11-06 20:29:40,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-06 20:29:40,524 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 7 states have (on average 1.4285714285714286) internal successors, (10), 8 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2023-11-06 20:29:40,525 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 20:29:40,525 INFO L225 Difference]: With dead ends: 54 [2023-11-06 20:29:40,526 INFO L226 Difference]: Without dead ends: 54 [2023-11-06 20:29:40,526 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2023-11-06 20:29:40,529 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 48 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 202 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 207 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 202 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-06 20:29:40,529 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [49 Valid, 27 Invalid, 207 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 202 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-06 20:29:40,530 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2023-11-06 20:29:40,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 48. [2023-11-06 20:29:40,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 34 states have (on average 1.5) internal successors, (51), 43 states have internal predecessors, (51), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2023-11-06 20:29:40,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 59 transitions. [2023-11-06 20:29:40,539 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 59 transitions. Word has length 12 [2023-11-06 20:29:40,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 20:29:40,540 INFO L495 AbstractCegarLoop]: Abstraction has 48 states and 59 transitions. [2023-11-06 20:29:40,540 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 7 states have (on average 1.4285714285714286) internal successors, (10), 8 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 20:29:40,540 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 59 transitions. [2023-11-06 20:29:40,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2023-11-06 20:29:40,541 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 20:29:40,542 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 20:29:40,542 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-11-06 20:29:40,542 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting selectionSortErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_FREE (and 15 more)] === [2023-11-06 20:29:40,543 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 20:29:40,543 INFO L85 PathProgramCache]: Analyzing trace with hash 1927723902, now seen corresponding path program 1 times [2023-11-06 20:29:40,543 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-06 20:29:40,543 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [45463362] [2023-11-06 20:29:40,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 20:29:40,544 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 20:29:40,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 20:29:40,705 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 20:29:40,705 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-06 20:29:40,706 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [45463362] [2023-11-06 20:29:40,706 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [45463362] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 20:29:40,706 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1172367115] [2023-11-06 20:29:40,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 20:29:40,706 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 20:29:40,707 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a2dadde-11b6-4dbe-b567-a97f271b829d/bin/utaipan-verify-FOvIYxoinp/z3 [2023-11-06 20:29:40,708 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a2dadde-11b6-4dbe-b567-a97f271b829d/bin/utaipan-verify-FOvIYxoinp/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 20:29:40,732 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a2dadde-11b6-4dbe-b567-a97f271b829d/bin/utaipan-verify-FOvIYxoinp/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-06 20:29:40,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 20:29:40,780 INFO L262 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-06 20:29:40,782 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 20:29:40,876 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 20:29:40,876 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 20:29:40,972 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 20:29:40,973 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1172367115] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 20:29:40,973 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1621239894] [2023-11-06 20:29:40,977 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2023-11-06 20:29:40,978 INFO L166 IcfgInterpreter]: Building call graph [2023-11-06 20:29:40,978 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-06 20:29:40,978 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-06 20:29:40,979 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-06 20:29:41,193 INFO L197 IcfgInterpreter]: Interpreting procedure selectionSort with input of size 16 for LOIs [2023-11-06 20:29:41,206 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-06 20:29:41,462 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSifa [1621239894] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 20:29:41,462 INFO L185 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2023-11-06 20:29:41,463 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [8, 8, 8] total 22 [2023-11-06 20:29:41,463 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [14802749] [2023-11-06 20:29:41,463 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 20:29:41,464 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-06 20:29:41,464 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-06 20:29:41,464 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-06 20:29:41,465 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=394, Unknown=0, NotChecked=0, Total=462 [2023-11-06 20:29:41,465 INFO L87 Difference]: Start difference. First operand 48 states and 59 transitions. Second operand has 9 states, 8 states have (on average 1.125) internal successors, (9), 7 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 20:29:41,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 20:29:41,647 INFO L93 Difference]: Finished difference Result 58 states and 65 transitions. [2023-11-06 20:29:41,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-06 20:29:41,648 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 1.125) internal successors, (9), 7 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2023-11-06 20:29:41,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 20:29:41,649 INFO L225 Difference]: With dead ends: 58 [2023-11-06 20:29:41,649 INFO L226 Difference]: Without dead ends: 58 [2023-11-06 20:29:41,649 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=68, Invalid=394, Unknown=0, NotChecked=0, Total=462 [2023-11-06 20:29:41,650 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 23 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 141 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 141 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 141 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-06 20:29:41,650 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 46 Invalid, 141 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 141 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-06 20:29:41,651 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2023-11-06 20:29:41,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 49. [2023-11-06 20:29:41,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 35 states have (on average 1.4857142857142858) internal successors, (52), 44 states have internal predecessors, (52), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2023-11-06 20:29:41,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 60 transitions. [2023-11-06 20:29:41,655 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 60 transitions. Word has length 12 [2023-11-06 20:29:41,655 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 20:29:41,655 INFO L495 AbstractCegarLoop]: Abstraction has 49 states and 60 transitions. [2023-11-06 20:29:41,655 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 1.125) internal successors, (9), 7 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 20:29:41,656 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 60 transitions. [2023-11-06 20:29:41,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2023-11-06 20:29:41,656 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 20:29:41,656 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 20:29:41,666 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a2dadde-11b6-4dbe-b567-a97f271b829d/bin/utaipan-verify-FOvIYxoinp/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-06 20:29:41,861 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a2dadde-11b6-4dbe-b567-a97f271b829d/bin/utaipan-verify-FOvIYxoinp/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 20:29:41,862 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting selectionSortErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_FREE (and 15 more)] === [2023-11-06 20:29:41,862 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 20:29:41,862 INFO L85 PathProgramCache]: Analyzing trace with hash -370147844, now seen corresponding path program 1 times [2023-11-06 20:29:41,862 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-06 20:29:41,862 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [691547996] [2023-11-06 20:29:41,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 20:29:41,863 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 20:29:41,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 20:29:42,133 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 20:29:42,134 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-06 20:29:42,134 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [691547996] [2023-11-06 20:29:42,134 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [691547996] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 20:29:42,134 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1888965209] [2023-11-06 20:29:42,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 20:29:42,135 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 20:29:42,135 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a2dadde-11b6-4dbe-b567-a97f271b829d/bin/utaipan-verify-FOvIYxoinp/z3 [2023-11-06 20:29:42,136 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a2dadde-11b6-4dbe-b567-a97f271b829d/bin/utaipan-verify-FOvIYxoinp/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 20:29:42,160 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a2dadde-11b6-4dbe-b567-a97f271b829d/bin/utaipan-verify-FOvIYxoinp/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-06 20:29:42,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 20:29:42,202 INFO L262 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-06 20:29:42,205 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 20:29:42,305 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-06 20:29:42,305 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 20:29:42,306 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1888965209] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 20:29:42,306 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-06 20:29:42,306 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 11 [2023-11-06 20:29:42,306 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [490464949] [2023-11-06 20:29:42,306 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 20:29:42,307 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-06 20:29:42,307 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-06 20:29:42,307 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-06 20:29:42,307 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2023-11-06 20:29:42,308 INFO L87 Difference]: Start difference. First operand 49 states and 60 transitions. Second operand has 7 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 6 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 20:29:42,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 20:29:42,437 INFO L93 Difference]: Finished difference Result 48 states and 58 transitions. [2023-11-06 20:29:42,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-06 20:29:42,438 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 6 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2023-11-06 20:29:42,438 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 20:29:42,439 INFO L225 Difference]: With dead ends: 48 [2023-11-06 20:29:42,439 INFO L226 Difference]: Without dead ends: 48 [2023-11-06 20:29:42,439 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2023-11-06 20:29:42,440 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 39 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 93 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 97 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 93 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-06 20:29:42,441 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [40 Valid, 34 Invalid, 97 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 93 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-06 20:29:42,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2023-11-06 20:29:42,446 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2023-11-06 20:29:42,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 35 states have (on average 1.4285714285714286) internal successors, (50), 43 states have internal predecessors, (50), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2023-11-06 20:29:42,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 58 transitions. [2023-11-06 20:29:42,447 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 58 transitions. Word has length 13 [2023-11-06 20:29:42,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 20:29:42,447 INFO L495 AbstractCegarLoop]: Abstraction has 48 states and 58 transitions. [2023-11-06 20:29:42,447 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 6 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 20:29:42,447 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 58 transitions. [2023-11-06 20:29:42,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2023-11-06 20:29:42,448 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 20:29:42,449 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 20:29:42,465 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a2dadde-11b6-4dbe-b567-a97f271b829d/bin/utaipan-verify-FOvIYxoinp/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-06 20:29:42,654 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a2dadde-11b6-4dbe-b567-a97f271b829d/bin/utaipan-verify-FOvIYxoinp/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 20:29:42,655 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_FREE (and 15 more)] === [2023-11-06 20:29:42,655 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 20:29:42,655 INFO L85 PathProgramCache]: Analyzing trace with hash -1305267756, now seen corresponding path program 1 times [2023-11-06 20:29:42,656 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-06 20:29:42,656 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [900999462] [2023-11-06 20:29:42,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 20:29:42,656 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 20:29:42,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 20:29:42,760 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 20:29:42,761 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-06 20:29:42,761 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [900999462] [2023-11-06 20:29:42,761 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [900999462] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 20:29:42,761 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 20:29:42,761 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-06 20:29:42,763 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1641576607] [2023-11-06 20:29:42,764 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 20:29:42,764 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-06 20:29:42,764 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-06 20:29:42,764 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-06 20:29:42,765 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-06 20:29:42,765 INFO L87 Difference]: Start difference. First operand 48 states and 58 transitions. Second operand has 4 states, 3 states have (on average 4.0) internal successors, (12), 4 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-06 20:29:42,799 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 20:29:42,799 INFO L93 Difference]: Finished difference Result 47 states and 57 transitions. [2023-11-06 20:29:42,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-06 20:29:42,799 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 4.0) internal successors, (12), 4 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 14 [2023-11-06 20:29:42,800 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 20:29:42,800 INFO L225 Difference]: With dead ends: 47 [2023-11-06 20:29:42,800 INFO L226 Difference]: Without dead ends: 34 [2023-11-06 20:29:42,800 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 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 20:29:42,801 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 0 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-06 20:29:42,802 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 45 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-06 20:29:42,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2023-11-06 20:29:42,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 29. [2023-11-06 20:29:42,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 22 states have (on average 1.3636363636363635) internal successors, (30), 26 states have internal predecessors, (30), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 20:29:42,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 32 transitions. [2023-11-06 20:29:42,807 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 32 transitions. Word has length 14 [2023-11-06 20:29:42,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 20:29:42,808 INFO L495 AbstractCegarLoop]: Abstraction has 29 states and 32 transitions. [2023-11-06 20:29:42,808 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 4.0) internal successors, (12), 4 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-06 20:29:42,808 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 32 transitions. [2023-11-06 20:29:42,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2023-11-06 20:29:42,809 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 20:29:42,810 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 20:29:42,810 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-11-06 20:29:42,810 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting selectionSortErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_FREE (and 15 more)] === [2023-11-06 20:29:42,810 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 20:29:42,810 INFO L85 PathProgramCache]: Analyzing trace with hash 770249000, now seen corresponding path program 1 times [2023-11-06 20:29:42,811 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-06 20:29:42,811 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1474900132] [2023-11-06 20:29:42,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 20:29:42,811 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 20:29:42,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 20:29:42,970 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-06 20:29:42,970 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-06 20:29:42,970 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1474900132] [2023-11-06 20:29:42,970 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1474900132] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 20:29:42,970 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 20:29:42,970 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-06 20:29:42,971 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [711240846] [2023-11-06 20:29:42,971 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 20:29:42,971 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-06 20:29:42,971 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-06 20:29:42,972 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-06 20:29:42,972 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-11-06 20:29:42,973 INFO L87 Difference]: Start difference. First operand 29 states and 32 transitions. Second operand has 6 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 20:29:43,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 20:29:43,061 INFO L93 Difference]: Finished difference Result 37 states and 40 transitions. [2023-11-06 20:29:43,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-06 20:29:43,062 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2023-11-06 20:29:43,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 20:29:43,062 INFO L225 Difference]: With dead ends: 37 [2023-11-06 20:29:43,062 INFO L226 Difference]: Without dead ends: 37 [2023-11-06 20:29:43,063 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2023-11-06 20:29:43,064 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 19 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 76 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 75 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-06 20:29:43,064 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 34 Invalid, 76 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 75 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-06 20:29:43,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2023-11-06 20:29:43,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 32. [2023-11-06 20:29:43,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 25 states have (on average 1.36) internal successors, (34), 29 states have internal predecessors, (34), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 20:29:43,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 36 transitions. [2023-11-06 20:29:43,070 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 36 transitions. Word has length 15 [2023-11-06 20:29:43,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 20:29:43,070 INFO L495 AbstractCegarLoop]: Abstraction has 32 states and 36 transitions. [2023-11-06 20:29:43,070 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 20:29:43,070 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 36 transitions. [2023-11-06 20:29:43,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2023-11-06 20:29:43,072 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 20:29:43,072 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 20:29:43,072 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-11-06 20:29:43,073 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting selectionSortErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_FREE (and 15 more)] === [2023-11-06 20:29:43,073 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 20:29:43,073 INFO L85 PathProgramCache]: Analyzing trace with hash -1892084145, now seen corresponding path program 1 times [2023-11-06 20:29:43,073 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-06 20:29:43,074 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [393357516] [2023-11-06 20:29:43,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 20:29:43,074 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 20:29:43,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 20:29:43,388 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-06 20:29:43,388 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-06 20:29:43,388 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [393357516] [2023-11-06 20:29:43,389 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [393357516] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 20:29:43,389 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2136175436] [2023-11-06 20:29:43,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 20:29:43,389 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 20:29:43,389 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a2dadde-11b6-4dbe-b567-a97f271b829d/bin/utaipan-verify-FOvIYxoinp/z3 [2023-11-06 20:29:43,390 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a2dadde-11b6-4dbe-b567-a97f271b829d/bin/utaipan-verify-FOvIYxoinp/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 20:29:43,424 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a2dadde-11b6-4dbe-b567-a97f271b829d/bin/utaipan-verify-FOvIYxoinp/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-06 20:29:43,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 20:29:43,473 INFO L262 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 19 conjunts are in the unsatisfiable core [2023-11-06 20:29:43,476 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 20:29:43,702 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 37 treesize of output 19 [2023-11-06 20:29:43,888 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 20:29:43,888 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 20:29:44,036 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 35 treesize of output 19 [2023-11-06 20:29:44,131 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 36 treesize of output 32 [2023-11-06 20:29:44,396 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 20:29:44,396 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2136175436] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 20:29:44,396 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1524104527] [2023-11-06 20:29:44,399 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2023-11-06 20:29:44,400 INFO L166 IcfgInterpreter]: Building call graph [2023-11-06 20:29:44,400 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-06 20:29:44,400 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-06 20:29:44,401 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-06 20:29:44,593 INFO L197 IcfgInterpreter]: Interpreting procedure selectionSort with input of size 16 for LOIs [2023-11-06 20:29:44,983 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-06 20:29:45,974 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSifa [1524104527] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 20:29:45,975 INFO L185 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2023-11-06 20:29:45,975 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [8, 10, 10] total 36 [2023-11-06 20:29:45,976 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1304676279] [2023-11-06 20:29:45,976 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 20:29:45,978 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-06 20:29:45,978 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-06 20:29:45,979 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-06 20:29:45,980 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=160, Invalid=1172, Unknown=0, NotChecked=0, Total=1332 [2023-11-06 20:29:45,981 INFO L87 Difference]: Start difference. First operand 32 states and 36 transitions. Second operand has 12 states, 10 states have (on average 1.3) internal successors, (13), 11 states have internal predecessors, (13), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 20:29:46,993 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 20:29:46,993 INFO L93 Difference]: Finished difference Result 40 states and 44 transitions. [2023-11-06 20:29:46,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-11-06 20:29:46,994 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 10 states have (on average 1.3) internal successors, (13), 11 states have internal predecessors, (13), 1 states have call successors, (1), 1 states have call predecessors, (1), 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 20:29:46,994 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 20:29:46,995 INFO L225 Difference]: With dead ends: 40 [2023-11-06 20:29:46,995 INFO L226 Difference]: Without dead ends: 40 [2023-11-06 20:29:46,996 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 448 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=219, Invalid=1503, Unknown=0, NotChecked=0, Total=1722 [2023-11-06 20:29:46,997 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 24 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 138 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 139 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 138 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-06 20:29:46,997 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 32 Invalid, 139 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 138 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-06 20:29:46,998 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2023-11-06 20:29:46,999 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 34. [2023-11-06 20:29:46,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 27 states have (on average 1.3703703703703705) internal successors, (37), 31 states have internal predecessors, (37), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 20:29:47,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 39 transitions. [2023-11-06 20:29:47,006 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 39 transitions. Word has length 16 [2023-11-06 20:29:47,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 20:29:47,007 INFO L495 AbstractCegarLoop]: Abstraction has 34 states and 39 transitions. [2023-11-06 20:29:47,007 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 10 states have (on average 1.3) internal successors, (13), 11 states have internal predecessors, (13), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 20:29:47,007 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 39 transitions. [2023-11-06 20:29:47,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2023-11-06 20:29:47,009 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 20:29:47,009 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 20:29:47,021 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a2dadde-11b6-4dbe-b567-a97f271b829d/bin/utaipan-verify-FOvIYxoinp/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-06 20:29:47,215 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a2dadde-11b6-4dbe-b567-a97f271b829d/bin/utaipan-verify-FOvIYxoinp/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 20:29:47,215 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting selectionSortErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_FREE (and 15 more)] === [2023-11-06 20:29:47,216 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 20:29:47,216 INFO L85 PathProgramCache]: Analyzing trace with hash -1521696127, now seen corresponding path program 1 times [2023-11-06 20:29:47,216 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-06 20:29:47,216 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1971552338] [2023-11-06 20:29:47,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 20:29:47,217 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 20:29:47,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 20:29:47,271 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-06 20:29:47,272 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-06 20:29:47,272 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1971552338] [2023-11-06 20:29:47,272 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1971552338] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 20:29:47,272 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 20:29:47,272 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-06 20:29:47,272 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1365212360] [2023-11-06 20:29:47,273 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 20:29:47,273 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 20:29:47,273 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-06 20:29:47,274 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 20:29:47,274 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 20:29:47,274 INFO L87 Difference]: Start difference. First operand 34 states and 39 transitions. Second operand has 3 states, 2 states have (on average 7.5) internal successors, (15), 3 states have internal predecessors, (15), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 20:29:47,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 20:29:47,305 INFO L93 Difference]: Finished difference Result 33 states and 38 transitions. [2023-11-06 20:29:47,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 20:29:47,305 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 7.5) internal successors, (15), 3 states have internal predecessors, (15), 1 states have call successors, (1), 1 states have call predecessors, (1), 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 20:29:47,306 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 20:29:47,306 INFO L225 Difference]: With dead ends: 33 [2023-11-06 20:29:47,307 INFO L226 Difference]: Without dead ends: 33 [2023-11-06 20:29:47,308 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 20:29:47,309 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 2 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 15 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-06 20:29:47,310 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 15 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-06 20:29:47,310 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2023-11-06 20:29:47,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2023-11-06 20:29:47,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 27 states have (on average 1.3333333333333333) internal successors, (36), 30 states have internal predecessors, (36), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 20:29:47,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 38 transitions. [2023-11-06 20:29:47,313 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 38 transitions. Word has length 18 [2023-11-06 20:29:47,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 20:29:47,313 INFO L495 AbstractCegarLoop]: Abstraction has 33 states and 38 transitions. [2023-11-06 20:29:47,313 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 7.5) internal successors, (15), 3 states have internal predecessors, (15), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 20:29:47,313 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 38 transitions. [2023-11-06 20:29:47,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2023-11-06 20:29:47,317 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 20:29:47,317 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 20:29:47,317 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2023-11-06 20:29:47,318 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting selectionSortErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_FREE (and 15 more)] === [2023-11-06 20:29:47,318 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 20:29:47,318 INFO L85 PathProgramCache]: Analyzing trace with hash -1278004099, now seen corresponding path program 1 times [2023-11-06 20:29:47,318 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-06 20:29:47,319 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1865426919] [2023-11-06 20:29:47,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 20:29:47,319 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 20:29:47,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 20:29:47,580 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 20:29:47,580 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-06 20:29:47,580 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1865426919] [2023-11-06 20:29:47,581 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1865426919] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 20:29:47,581 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2006127162] [2023-11-06 20:29:47,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 20:29:47,581 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 20:29:47,581 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a2dadde-11b6-4dbe-b567-a97f271b829d/bin/utaipan-verify-FOvIYxoinp/z3 [2023-11-06 20:29:47,582 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a2dadde-11b6-4dbe-b567-a97f271b829d/bin/utaipan-verify-FOvIYxoinp/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 20:29:47,612 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a2dadde-11b6-4dbe-b567-a97f271b829d/bin/utaipan-verify-FOvIYxoinp/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-06 20:29:47,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 20:29:47,680 INFO L262 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 13 conjunts are in the unsatisfiable core [2023-11-06 20:29:47,683 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 20:29:47,826 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 20:29:47,826 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 20:29:47,937 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 20:29:47,938 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2006127162] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 20:29:47,938 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1480676760] [2023-11-06 20:29:47,941 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2023-11-06 20:29:47,941 INFO L166 IcfgInterpreter]: Building call graph [2023-11-06 20:29:47,942 FATAL L? ?]: Ignoring exception! java.lang.IllegalArgumentException: Recursive programs are not supported. at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.topsortRelevant(CallGraph.java:132) at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.(CallGraph.java:97) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.(IcfgInterpreter.java:92) at de.uni_freiburg.informatik.ultimate.plugins.sifa.SifaBuilder.construct(SifaBuilder.java:96) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:98) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:68) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:267) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:148) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:137) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:337) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:431) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:366) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:415) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:262) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:175) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:154) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:167) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:150) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:127) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:233) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:227) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:144) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:106) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:319) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2023-11-06 20:29:47,945 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 20:29:47,945 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 17 [2023-11-06 20:29:47,945 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [931410763] [2023-11-06 20:29:47,945 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 20:29:47,946 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-11-06 20:29:47,946 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-06 20:29:47,947 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-11-06 20:29:47,947 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=221, Unknown=0, NotChecked=0, Total=272 [2023-11-06 20:29:47,948 INFO L87 Difference]: Start difference. First operand 33 states and 38 transitions. Second operand has 17 states, 16 states have (on average 2.875) internal successors, (46), 12 states have internal predecessors, (46), 4 states have call successors, (6), 5 states have call predecessors, (6), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 20:29:48,075 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 20:29:48,075 INFO L93 Difference]: Finished difference Result 50 states and 56 transitions. [2023-11-06 20:29:48,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-06 20:29:48,076 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 2.875) internal successors, (46), 12 states have internal predecessors, (46), 4 states have call successors, (6), 5 states have call predecessors, (6), 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 20:29:48,076 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 20:29:48,076 INFO L225 Difference]: With dead ends: 50 [2023-11-06 20:29:48,076 INFO L226 Difference]: Without dead ends: 36 [2023-11-06 20:29:48,077 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 34 SyntacticMatches, 5 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=69, Invalid=273, Unknown=0, NotChecked=0, Total=342 [2023-11-06 20:29:48,077 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 23 mSDsluCounter, 53 mSDsCounter, 0 mSdLazyCounter, 115 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 63 SdHoareTripleChecker+Invalid, 115 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 115 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-06 20:29:48,078 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 63 Invalid, 115 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 115 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-06 20:29:48,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2023-11-06 20:29:48,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 35. [2023-11-06 20:29:48,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 29 states have (on average 1.3103448275862069) internal successors, (38), 32 states have internal predecessors, (38), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 20:29:48,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 40 transitions. [2023-11-06 20:29:48,080 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 40 transitions. Word has length 23 [2023-11-06 20:29:48,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 20:29:48,080 INFO L495 AbstractCegarLoop]: Abstraction has 35 states and 40 transitions. [2023-11-06 20:29:48,081 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 2.875) internal successors, (46), 12 states have internal predecessors, (46), 4 states have call successors, (6), 5 states have call predecessors, (6), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 20:29:48,081 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 40 transitions. [2023-11-06 20:29:48,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2023-11-06 20:29:48,081 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 20:29:48,081 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 20:29:48,096 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a2dadde-11b6-4dbe-b567-a97f271b829d/bin/utaipan-verify-FOvIYxoinp/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-06 20:29:48,282 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a2dadde-11b6-4dbe-b567-a97f271b829d/bin/utaipan-verify-FOvIYxoinp/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-11-06 20:29:48,282 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting selectionSortErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_FREE (and 15 more)] === [2023-11-06 20:29:48,283 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 20:29:48,283 INFO L85 PathProgramCache]: Analyzing trace with hash -2088294606, now seen corresponding path program 2 times [2023-11-06 20:29:48,283 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-06 20:29:48,283 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1133630978] [2023-11-06 20:29:48,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 20:29:48,284 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 20:29:48,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 20:29:48,546 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 20:29:48,546 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-06 20:29:48,546 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1133630978] [2023-11-06 20:29:48,546 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1133630978] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 20:29:48,546 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1729255018] [2023-11-06 20:29:48,547 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-06 20:29:48,547 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 20:29:48,547 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a2dadde-11b6-4dbe-b567-a97f271b829d/bin/utaipan-verify-FOvIYxoinp/z3 [2023-11-06 20:29:48,548 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a2dadde-11b6-4dbe-b567-a97f271b829d/bin/utaipan-verify-FOvIYxoinp/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 20:29:48,576 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a2dadde-11b6-4dbe-b567-a97f271b829d/bin/utaipan-verify-FOvIYxoinp/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-06 20:29:48,644 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-11-06 20:29:48,644 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 20:29:48,646 INFO L262 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 28 conjunts are in the unsatisfiable core [2023-11-06 20:29:48,651 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 20:29:48,889 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-11-06 20:29:48,890 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 20:29:49,431 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-11-06 20:29:49,431 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1729255018] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 20:29:49,432 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [512476435] [2023-11-06 20:29:49,435 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2023-11-06 20:29:49,436 INFO L166 IcfgInterpreter]: Building call graph [2023-11-06 20:29:49,436 FATAL L? ?]: Ignoring exception! java.lang.IllegalArgumentException: Recursive programs are not supported. at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.topsortRelevant(CallGraph.java:132) at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.(CallGraph.java:97) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.(IcfgInterpreter.java:92) at de.uni_freiburg.informatik.ultimate.plugins.sifa.SifaBuilder.construct(SifaBuilder.java:96) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:98) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:68) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:267) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:148) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:137) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:337) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:431) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:366) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:415) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:262) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:175) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:154) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:167) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:150) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:127) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:233) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:227) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:144) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:106) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:319) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2023-11-06 20:29:49,437 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 20:29:49,438 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 26 [2023-11-06 20:29:49,439 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [988289296] [2023-11-06 20:29:49,439 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 20:29:49,440 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-11-06 20:29:49,441 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-06 20:29:49,441 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-11-06 20:29:49,442 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=582, Unknown=0, NotChecked=0, Total=650 [2023-11-06 20:29:49,442 INFO L87 Difference]: Start difference. First operand 35 states and 40 transitions. Second operand has 26 states, 24 states have (on average 2.4166666666666665) internal successors, (58), 21 states have internal predecessors, (58), 6 states have call successors, (6), 6 states have call predecessors, (6), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 20:29:50,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 20:29:50,309 INFO L93 Difference]: Finished difference Result 45 states and 50 transitions. [2023-11-06 20:29:50,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-11-06 20:29:50,310 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 24 states have (on average 2.4166666666666665) internal successors, (58), 21 states have internal predecessors, (58), 6 states have call successors, (6), 6 states have call predecessors, (6), 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 20:29:50,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 20:29:50,311 INFO L225 Difference]: With dead ends: 45 [2023-11-06 20:29:50,311 INFO L226 Difference]: Without dead ends: 45 [2023-11-06 20:29:50,312 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 218 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=221, Invalid=1419, Unknown=0, NotChecked=0, Total=1640 [2023-11-06 20:29:50,313 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 120 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 591 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 120 SdHoareTripleChecker+Valid, 14 SdHoareTripleChecker+Invalid, 597 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 591 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-06 20:29:50,313 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [120 Valid, 14 Invalid, 597 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 591 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-06 20:29:50,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2023-11-06 20:29:50,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 39. [2023-11-06 20:29:50,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 33 states have (on average 1.2727272727272727) internal successors, (42), 36 states have internal predecessors, (42), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 20:29:50,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 44 transitions. [2023-11-06 20:29:50,315 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 44 transitions. Word has length 25 [2023-11-06 20:29:50,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 20:29:50,316 INFO L495 AbstractCegarLoop]: Abstraction has 39 states and 44 transitions. [2023-11-06 20:29:50,317 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 24 states have (on average 2.4166666666666665) internal successors, (58), 21 states have internal predecessors, (58), 6 states have call successors, (6), 6 states have call predecessors, (6), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 20:29:50,317 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 44 transitions. [2023-11-06 20:29:50,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2023-11-06 20:29:50,318 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 20:29:50,318 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 20:29:50,329 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a2dadde-11b6-4dbe-b567-a97f271b829d/bin/utaipan-verify-FOvIYxoinp/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-11-06 20:29:50,518 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a2dadde-11b6-4dbe-b567-a97f271b829d/bin/utaipan-verify-FOvIYxoinp/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-11-06 20:29:50,519 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting selectionSortErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_FREE (and 15 more)] === [2023-11-06 20:29:50,519 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 20:29:50,519 INFO L85 PathProgramCache]: Analyzing trace with hash 422751135, now seen corresponding path program 1 times [2023-11-06 20:29:50,519 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-06 20:29:50,520 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [188637853] [2023-11-06 20:29:50,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 20:29:50,520 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 20:29:50,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 20:29:50,588 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-11-06 20:29:50,589 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-06 20:29:50,589 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [188637853] [2023-11-06 20:29:50,589 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [188637853] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 20:29:50,589 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 20:29:50,590 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-06 20:29:50,590 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1648809357] [2023-11-06 20:29:50,590 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 20:29:50,590 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 20:29:50,590 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-06 20:29:50,591 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 20:29:50,591 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 20:29:50,591 INFO L87 Difference]: Start difference. First operand 39 states and 44 transitions. Second operand has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 20:29:50,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 20:29:50,612 INFO L93 Difference]: Finished difference Result 34 states and 37 transitions. [2023-11-06 20:29:50,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 20:29:50,612 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2023-11-06 20:29:50,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 20:29:50,615 INFO L225 Difference]: With dead ends: 34 [2023-11-06 20:29:50,615 INFO L226 Difference]: Without dead ends: 34 [2023-11-06 20:29:50,615 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 20:29:50,616 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 3 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-06 20:29:50,617 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 16 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-06 20:29:50,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2023-11-06 20:29:50,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2023-11-06 20:29:50,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 30 states have (on average 1.1666666666666667) internal successors, (35), 31 states have internal predecessors, (35), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 20:29:50,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 37 transitions. [2023-11-06 20:29:50,621 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 37 transitions. Word has length 28 [2023-11-06 20:29:50,621 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 20:29:50,621 INFO L495 AbstractCegarLoop]: Abstraction has 34 states and 37 transitions. [2023-11-06 20:29:50,621 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 20:29:50,621 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 37 transitions. [2023-11-06 20:29:50,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2023-11-06 20:29:50,625 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 20:29:50,625 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 20:29:50,625 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2023-11-06 20:29:50,625 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting selectionSortErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_FREE (and 15 more)] === [2023-11-06 20:29:50,626 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 20:29:50,626 INFO L85 PathProgramCache]: Analyzing trace with hash 1290148742, now seen corresponding path program 3 times [2023-11-06 20:29:50,626 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-06 20:29:50,626 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [4680771] [2023-11-06 20:29:50,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 20:29:50,627 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 20:29:50,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 20:29:50,896 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 4 proven. 21 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-06 20:29:50,896 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-06 20:29:50,896 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [4680771] [2023-11-06 20:29:50,897 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [4680771] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 20:29:50,897 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2100144034] [2023-11-06 20:29:50,897 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-06 20:29:50,897 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 20:29:50,897 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a2dadde-11b6-4dbe-b567-a97f271b829d/bin/utaipan-verify-FOvIYxoinp/z3 [2023-11-06 20:29:50,898 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a2dadde-11b6-4dbe-b567-a97f271b829d/bin/utaipan-verify-FOvIYxoinp/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 20:29:50,928 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a2dadde-11b6-4dbe-b567-a97f271b829d/bin/utaipan-verify-FOvIYxoinp/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-06 20:29:50,991 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-06 20:29:50,991 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 20:29:50,993 INFO L262 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 11 conjunts are in the unsatisfiable core [2023-11-06 20:29:50,996 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 20:29:51,086 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 6 proven. 15 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-11-06 20:29:51,087 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 20:29:51,213 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 6 proven. 15 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-11-06 20:29:51,213 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2100144034] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 20:29:51,213 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1073633712] [2023-11-06 20:29:51,217 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2023-11-06 20:29:51,217 INFO L166 IcfgInterpreter]: Building call graph [2023-11-06 20:29:51,217 FATAL L? ?]: Ignoring exception! java.lang.IllegalArgumentException: Recursive programs are not supported. at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.topsortRelevant(CallGraph.java:132) at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.(CallGraph.java:97) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.(IcfgInterpreter.java:92) at de.uni_freiburg.informatik.ultimate.plugins.sifa.SifaBuilder.construct(SifaBuilder.java:96) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:98) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:68) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:267) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:148) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:137) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:337) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:431) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:366) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:415) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:262) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:175) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:154) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:167) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:150) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:127) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:233) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:227) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:144) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:106) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:319) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2023-11-06 20:29:51,218 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 20:29:51,218 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10, 10] total 17 [2023-11-06 20:29:51,218 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [701759566] [2023-11-06 20:29:51,218 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 20:29:51,219 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-11-06 20:29:51,219 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-06 20:29:51,220 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-11-06 20:29:51,220 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2023-11-06 20:29:51,221 INFO L87 Difference]: Start difference. First operand 34 states and 37 transitions. Second operand has 17 states, 16 states have (on average 2.6875) internal successors, (43), 15 states have internal predecessors, (43), 4 states have call successors, (4), 3 states have call predecessors, (4), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 20:29:51,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 20:29:51,571 INFO L93 Difference]: Finished difference Result 91 states and 99 transitions. [2023-11-06 20:29:51,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-11-06 20:29:51,572 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 2.6875) internal successors, (43), 15 states have internal predecessors, (43), 4 states have call successors, (4), 3 states have call predecessors, (4), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2023-11-06 20:29:51,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 20:29:51,573 INFO L225 Difference]: With dead ends: 91 [2023-11-06 20:29:51,573 INFO L226 Difference]: Without dead ends: 91 [2023-11-06 20:29:51,573 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 53 SyntacticMatches, 7 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=100, Invalid=452, Unknown=0, NotChecked=0, Total=552 [2023-11-06 20:29:51,574 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 52 mSDsluCounter, 61 mSDsCounter, 0 mSdLazyCounter, 279 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 69 SdHoareTripleChecker+Invalid, 281 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 279 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-06 20:29:51,574 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [52 Valid, 69 Invalid, 281 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 279 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-06 20:29:51,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2023-11-06 20:29:51,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 66. [2023-11-06 20:29:51,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 60 states have (on average 1.2) internal successors, (72), 61 states have internal predecessors, (72), 4 states have call successors, (4), 4 states have call predecessors, (4), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 20:29:51,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 76 transitions. [2023-11-06 20:29:51,578 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 76 transitions. Word has length 31 [2023-11-06 20:29:51,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 20:29:51,578 INFO L495 AbstractCegarLoop]: Abstraction has 66 states and 76 transitions. [2023-11-06 20:29:51,578 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 2.6875) internal successors, (43), 15 states have internal predecessors, (43), 4 states have call successors, (4), 3 states have call predecessors, (4), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 20:29:51,578 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 76 transitions. [2023-11-06 20:29:51,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2023-11-06 20:29:51,579 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 20:29:51,579 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 20:29:51,592 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a2dadde-11b6-4dbe-b567-a97f271b829d/bin/utaipan-verify-FOvIYxoinp/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2023-11-06 20:29:51,786 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a2dadde-11b6-4dbe-b567-a97f271b829d/bin/utaipan-verify-FOvIYxoinp/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 20:29:51,787 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting selectionSortErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_FREE (and 15 more)] === [2023-11-06 20:29:51,787 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 20:29:51,787 INFO L85 PathProgramCache]: Analyzing trace with hash 1290150247, now seen corresponding path program 2 times [2023-11-06 20:29:51,788 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-06 20:29:51,788 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [271559928] [2023-11-06 20:29:51,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 20:29:51,788 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 20:29:51,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 20:29:52,039 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-11-06 20:29:52,039 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-06 20:29:52,039 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [271559928] [2023-11-06 20:29:52,039 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [271559928] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 20:29:52,039 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [485482164] [2023-11-06 20:29:52,040 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-06 20:29:52,040 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 20:29:52,040 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a2dadde-11b6-4dbe-b567-a97f271b829d/bin/utaipan-verify-FOvIYxoinp/z3 [2023-11-06 20:29:52,041 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a2dadde-11b6-4dbe-b567-a97f271b829d/bin/utaipan-verify-FOvIYxoinp/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 20:29:52,064 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a2dadde-11b6-4dbe-b567-a97f271b829d/bin/utaipan-verify-FOvIYxoinp/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-06 20:29:52,126 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-11-06 20:29:52,126 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 20:29:52,127 INFO L262 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-06 20:29:52,131 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 20:29:52,344 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 13 proven. 1 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-11-06 20:29:52,344 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 20:29:52,383 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 29 treesize of output 25 [2023-11-06 20:29:52,537 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 13 proven. 1 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-11-06 20:29:52,537 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [485482164] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 20:29:52,537 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2081994665] [2023-11-06 20:29:52,540 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2023-11-06 20:29:52,540 INFO L166 IcfgInterpreter]: Building call graph [2023-11-06 20:29:52,540 FATAL L? ?]: Ignoring exception! java.lang.IllegalArgumentException: Recursive programs are not supported. at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.topsortRelevant(CallGraph.java:132) at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.(CallGraph.java:97) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.(IcfgInterpreter.java:92) at de.uni_freiburg.informatik.ultimate.plugins.sifa.SifaBuilder.construct(SifaBuilder.java:96) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:98) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:68) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:267) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:148) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:137) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:337) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:431) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:366) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:415) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:262) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:175) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:154) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:167) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:150) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:127) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:233) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:227) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:144) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:106) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:319) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2023-11-06 20:29:52,541 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 20:29:52,541 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 22 [2023-11-06 20:29:52,541 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1535075179] [2023-11-06 20:29:52,541 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 20:29:52,542 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-11-06 20:29:52,542 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-06 20:29:52,542 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-11-06 20:29:52,543 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=406, Unknown=0, NotChecked=0, Total=506 [2023-11-06 20:29:52,543 INFO L87 Difference]: Start difference. First operand 66 states and 76 transitions. Second operand has 23 states, 22 states have (on average 2.909090909090909) internal successors, (64), 17 states have internal predecessors, (64), 6 states have call successors, (6), 6 states have call predecessors, (6), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 20:29:52,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 20:29:52,860 INFO L93 Difference]: Finished difference Result 73 states and 82 transitions. [2023-11-06 20:29:52,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-11-06 20:29:52,861 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 22 states have (on average 2.909090909090909) internal successors, (64), 17 states have internal predecessors, (64), 6 states have call successors, (6), 6 states have call predecessors, (6), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2023-11-06 20:29:52,862 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 20:29:52,862 INFO L225 Difference]: With dead ends: 73 [2023-11-06 20:29:52,862 INFO L226 Difference]: Without dead ends: 47 [2023-11-06 20:29:52,863 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 181 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=214, Invalid=716, Unknown=0, NotChecked=0, Total=930 [2023-11-06 20:29:52,864 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 74 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 230 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 235 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 230 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-06 20:29:52,864 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [74 Valid, 23 Invalid, 235 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 230 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-06 20:29:52,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2023-11-06 20:29:52,866 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 42. [2023-11-06 20:29:52,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 39 states have (on average 1.1282051282051282) internal successors, (44), 39 states have internal predecessors, (44), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 20:29:52,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 46 transitions. [2023-11-06 20:29:52,867 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 46 transitions. Word has length 31 [2023-11-06 20:29:52,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 20:29:52,867 INFO L495 AbstractCegarLoop]: Abstraction has 42 states and 46 transitions. [2023-11-06 20:29:52,867 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 22 states have (on average 2.909090909090909) internal successors, (64), 17 states have internal predecessors, (64), 6 states have call successors, (6), 6 states have call predecessors, (6), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 20:29:52,867 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 46 transitions. [2023-11-06 20:29:52,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2023-11-06 20:29:52,868 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 20:29:52,868 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 20:29:52,880 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a2dadde-11b6-4dbe-b567-a97f271b829d/bin/utaipan-verify-FOvIYxoinp/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-11-06 20:29:53,069 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a2dadde-11b6-4dbe-b567-a97f271b829d/bin/utaipan-verify-FOvIYxoinp/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 20:29:53,069 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting selectionSortErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_FREE (and 15 more)] === [2023-11-06 20:29:53,069 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 20:29:53,070 INFO L85 PathProgramCache]: Analyzing trace with hash -960611523, now seen corresponding path program 4 times [2023-11-06 20:29:53,070 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-06 20:29:53,070 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [190261912] [2023-11-06 20:29:53,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 20:29:53,070 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 20:29:53,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 20:29:53,734 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 6 proven. 31 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-11-06 20:29:53,734 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-06 20:29:53,734 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [190261912] [2023-11-06 20:29:53,734 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [190261912] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 20:29:53,734 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1836073169] [2023-11-06 20:29:53,735 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-06 20:29:53,735 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 20:29:53,735 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a2dadde-11b6-4dbe-b567-a97f271b829d/bin/utaipan-verify-FOvIYxoinp/z3 [2023-11-06 20:29:53,736 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a2dadde-11b6-4dbe-b567-a97f271b829d/bin/utaipan-verify-FOvIYxoinp/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 20:29:53,760 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a2dadde-11b6-4dbe-b567-a97f271b829d/bin/utaipan-verify-FOvIYxoinp/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-06 20:29:53,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 20:29:53,838 INFO L262 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 36 conjunts are in the unsatisfiable core [2023-11-06 20:29:53,841 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 20:29:53,847 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 20:29:54,316 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 12 proven. 25 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-11-06 20:29:54,316 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 20:29:54,962 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 16 proven. 21 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-11-06 20:29:54,962 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1836073169] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 20:29:54,962 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [546011560] [2023-11-06 20:29:54,965 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2023-11-06 20:29:54,965 INFO L166 IcfgInterpreter]: Building call graph [2023-11-06 20:29:54,965 FATAL L? ?]: Ignoring exception! java.lang.IllegalArgumentException: Recursive programs are not supported. at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.topsortRelevant(CallGraph.java:132) at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.(CallGraph.java:97) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.(IcfgInterpreter.java:92) at de.uni_freiburg.informatik.ultimate.plugins.sifa.SifaBuilder.construct(SifaBuilder.java:96) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:98) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:68) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:267) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:148) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:137) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:337) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:431) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:366) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:415) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:262) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:175) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:154) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:167) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:150) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:127) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:233) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:227) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:144) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:106) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:319) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2023-11-06 20:29:54,965 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 20:29:54,965 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 34 [2023-11-06 20:29:54,966 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [472372023] [2023-11-06 20:29:54,966 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 20:29:54,966 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2023-11-06 20:29:54,966 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-06 20:29:54,967 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2023-11-06 20:29:54,968 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=147, Invalid=1043, Unknown=0, NotChecked=0, Total=1190 [2023-11-06 20:29:54,968 INFO L87 Difference]: Start difference. First operand 42 states and 46 transitions. Second operand has 35 states, 34 states have (on average 2.411764705882353) internal successors, (82), 29 states have internal predecessors, (82), 6 states have call successors, (6), 6 states have call predecessors, (6), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 20:29:55,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 20:29:55,779 INFO L93 Difference]: Finished difference Result 66 states and 71 transitions. [2023-11-06 20:29:55,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-11-06 20:29:55,779 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 34 states have (on average 2.411764705882353) internal successors, (82), 29 states have internal predecessors, (82), 6 states have call successors, (6), 6 states have call predecessors, (6), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2023-11-06 20:29:55,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 20:29:55,780 INFO L225 Difference]: With dead ends: 66 [2023-11-06 20:29:55,780 INFO L226 Difference]: Without dead ends: 66 [2023-11-06 20:29:55,781 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 347 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=253, Invalid=1639, Unknown=0, NotChecked=0, Total=1892 [2023-11-06 20:29:55,782 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 119 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 625 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 119 SdHoareTripleChecker+Valid, 9 SdHoareTripleChecker+Invalid, 629 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 625 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-06 20:29:55,782 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [119 Valid, 9 Invalid, 629 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 625 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-06 20:29:55,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2023-11-06 20:29:55,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 54. [2023-11-06 20:29:55,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 50 states have (on average 1.1) internal successors, (55), 50 states have internal predecessors, (55), 3 states have call successors, (3), 3 states have call predecessors, (3), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 20:29:55,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 58 transitions. [2023-11-06 20:29:55,786 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 58 transitions. Word has length 36 [2023-11-06 20:29:55,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 20:29:55,787 INFO L495 AbstractCegarLoop]: Abstraction has 54 states and 58 transitions. [2023-11-06 20:29:55,787 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 34 states have (on average 2.411764705882353) internal successors, (82), 29 states have internal predecessors, (82), 6 states have call successors, (6), 6 states have call predecessors, (6), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 20:29:55,787 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 58 transitions. [2023-11-06 20:29:55,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2023-11-06 20:29:55,787 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 20:29:55,788 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 5, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 20:29:55,794 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a2dadde-11b6-4dbe-b567-a97f271b829d/bin/utaipan-verify-FOvIYxoinp/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-11-06 20:29:55,993 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a2dadde-11b6-4dbe-b567-a97f271b829d/bin/utaipan-verify-FOvIYxoinp/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 20:29:55,993 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting selectionSortErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_FREE (and 15 more)] === [2023-11-06 20:29:55,993 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 20:29:55,994 INFO L85 PathProgramCache]: Analyzing trace with hash -210755161, now seen corresponding path program 5 times [2023-11-06 20:29:55,994 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-06 20:29:55,994 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1803752032] [2023-11-06 20:29:55,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 20:29:55,994 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 20:29:56,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 20:29:56,310 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 10 proven. 42 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-11-06 20:29:56,311 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-06 20:29:56,311 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1803752032] [2023-11-06 20:29:56,311 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1803752032] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 20:29:56,311 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1516160141] [2023-11-06 20:29:56,311 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-06 20:29:56,312 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 20:29:56,312 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a2dadde-11b6-4dbe-b567-a97f271b829d/bin/utaipan-verify-FOvIYxoinp/z3 [2023-11-06 20:29:56,328 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a2dadde-11b6-4dbe-b567-a97f271b829d/bin/utaipan-verify-FOvIYxoinp/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 20:29:56,392 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a2dadde-11b6-4dbe-b567-a97f271b829d/bin/utaipan-verify-FOvIYxoinp/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-11-06 20:29:56,496 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-11-06 20:29:56,496 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 20:29:56,498 INFO L262 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 24 conjunts are in the unsatisfiable core [2023-11-06 20:29:56,501 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 20:29:56,504 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 20:29:56,719 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 14 proven. 5 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-11-06 20:29:56,719 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 20:29:57,203 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 4 proven. 15 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-11-06 20:29:57,203 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1516160141] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 20:29:57,203 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1120361938] [2023-11-06 20:29:57,205 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2023-11-06 20:29:57,205 INFO L166 IcfgInterpreter]: Building call graph [2023-11-06 20:29:57,206 FATAL L? ?]: Ignoring exception! java.lang.IllegalArgumentException: Recursive programs are not supported. at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.topsortRelevant(CallGraph.java:132) at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.(CallGraph.java:97) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.(IcfgInterpreter.java:92) at de.uni_freiburg.informatik.ultimate.plugins.sifa.SifaBuilder.construct(SifaBuilder.java:96) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:98) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:68) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:267) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:148) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:137) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:337) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:431) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:366) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:415) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:262) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:175) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:154) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:167) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:150) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:127) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:233) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:227) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:144) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:106) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:319) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2023-11-06 20:29:57,206 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 20:29:57,206 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 8, 8] total 29 [2023-11-06 20:29:57,206 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1052224053] [2023-11-06 20:29:57,206 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 20:29:57,207 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-11-06 20:29:57,207 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-06 20:29:57,207 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-11-06 20:29:57,211 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=725, Unknown=0, NotChecked=0, Total=812 [2023-11-06 20:29:57,211 INFO L87 Difference]: Start difference. First operand 54 states and 58 transitions. Second operand has 29 states, 26 states have (on average 2.5384615384615383) internal successors, (66), 25 states have internal predecessors, (66), 6 states have call successors, (6), 4 states have call predecessors, (6), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 20:29:58,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 20:29:58,091 INFO L93 Difference]: Finished difference Result 83 states and 87 transitions. [2023-11-06 20:29:58,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2023-11-06 20:29:58,092 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 26 states have (on average 2.5384615384615383) internal successors, (66), 25 states have internal predecessors, (66), 6 states have call successors, (6), 4 states have call predecessors, (6), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2023-11-06 20:29:58,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 20:29:58,092 INFO L225 Difference]: With dead ends: 83 [2023-11-06 20:29:58,092 INFO L226 Difference]: Without dead ends: 0 [2023-11-06 20:29:58,094 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 402 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=359, Invalid=2191, Unknown=0, NotChecked=0, Total=2550 [2023-11-06 20:29:58,095 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 58 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 407 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 15 SdHoareTripleChecker+Invalid, 411 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 407 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-06 20:29:58,095 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [58 Valid, 15 Invalid, 411 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 407 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-06 20:29:58,096 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2023-11-06 20:29:58,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2023-11-06 20:29:58,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 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 20:29:58,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2023-11-06 20:29:58,097 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 39 [2023-11-06 20:29:58,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 20:29:58,097 INFO L495 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2023-11-06 20:29:58,097 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 26 states have (on average 2.5384615384615383) internal successors, (66), 25 states have internal predecessors, (66), 6 states have call successors, (6), 4 states have call predecessors, (6), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 20:29:58,097 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2023-11-06 20:29:58,097 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2023-11-06 20:29:58,100 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (17 of 18 remaining) [2023-11-06 20:29:58,101 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (16 of 18 remaining) [2023-11-06 20:29:58,101 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_FREE (15 of 18 remaining) [2023-11-06 20:29:58,101 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr3ASSERT_VIOLATIONMEMORY_FREE (14 of 18 remaining) [2023-11-06 20:29:58,101 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_FREE (13 of 18 remaining) [2023-11-06 20:29:58,102 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_LEAK (12 of 18 remaining) [2023-11-06 20:29:58,102 INFO L805 garLoopResultBuilder]: Registering result SAFE for location selectionSortErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (11 of 18 remaining) [2023-11-06 20:29:58,102 INFO L805 garLoopResultBuilder]: Registering result SAFE for location selectionSortErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (10 of 18 remaining) [2023-11-06 20:29:58,102 INFO L805 garLoopResultBuilder]: Registering result SAFE for location selectionSortErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (9 of 18 remaining) [2023-11-06 20:29:58,102 INFO L805 garLoopResultBuilder]: Registering result SAFE for location selectionSortErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (8 of 18 remaining) [2023-11-06 20:29:58,103 INFO L805 garLoopResultBuilder]: Registering result SAFE for location selectionSortErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 18 remaining) [2023-11-06 20:29:58,103 INFO L805 garLoopResultBuilder]: Registering result SAFE for location selectionSortErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 18 remaining) [2023-11-06 20:29:58,103 INFO L805 garLoopResultBuilder]: Registering result SAFE for location selectionSortErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 18 remaining) [2023-11-06 20:29:58,103 INFO L805 garLoopResultBuilder]: Registering result SAFE for location selectionSortErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 18 remaining) [2023-11-06 20:29:58,103 INFO L805 garLoopResultBuilder]: Registering result SAFE for location selectionSortErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 18 remaining) [2023-11-06 20:29:58,104 INFO L805 garLoopResultBuilder]: Registering result SAFE for location selectionSortErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 18 remaining) [2023-11-06 20:29:58,104 INFO L805 garLoopResultBuilder]: Registering result SAFE for location selectionSortErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE (1 of 18 remaining) [2023-11-06 20:29:58,104 INFO L805 garLoopResultBuilder]: Registering result SAFE for location selectionSortErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE (0 of 18 remaining) [2023-11-06 20:29:58,115 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a2dadde-11b6-4dbe-b567-a97f271b829d/bin/utaipan-verify-FOvIYxoinp/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-11-06 20:29:58,314 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a2dadde-11b6-4dbe-b567-a97f271b829d/bin/utaipan-verify-FOvIYxoinp/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2023-11-06 20:29:58,317 INFO L445 BasicCegarLoop]: Path program histogram: [5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 20:29:58,319 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-11-06 20:29:58,324 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.11 08:29:58 BoogieIcfgContainer [2023-11-06 20:29:58,324 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-11-06 20:29:58,325 INFO L112 PluginConnector]: ------------------------Witness Printer---------------------------- [2023-11-06 20:29:58,325 INFO L270 PluginConnector]: Initializing Witness Printer... [2023-11-06 20:29:58,325 INFO L274 PluginConnector]: Witness Printer initialized [2023-11-06 20:29:58,325 INFO L184 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 08:29:34" (3/4) ... [2023-11-06 20:29:58,328 INFO L137 WitnessPrinter]: Generating witness for correct program [2023-11-06 20:29:58,332 INFO L361 RCFGBacktranslator]: Ignoring RootEdge to procedure selectionSort [2023-11-06 20:29:58,342 INFO L939 BoogieBacktranslator]: Reduced CFG by removing 23 nodes and edges [2023-11-06 20:29:58,342 INFO L939 BoogieBacktranslator]: Reduced CFG by removing 8 nodes and edges [2023-11-06 20:29:58,342 INFO L939 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2023-11-06 20:29:58,342 INFO L939 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2023-11-06 20:29:58,412 INFO L149 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a2dadde-11b6-4dbe-b567-a97f271b829d/bin/utaipan-verify-FOvIYxoinp/witness.graphml.graphml [2023-11-06 20:29:58,412 INFO L149 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a2dadde-11b6-4dbe-b567-a97f271b829d/bin/utaipan-verify-FOvIYxoinp/witness.graphml.yaml [2023-11-06 20:29:58,413 INFO L131 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2023-11-06 20:29:58,413 INFO L158 Benchmark]: Toolchain (without parser) took 24742.81ms. Allocated memory was 190.8MB in the beginning and 343.9MB in the end (delta: 153.1MB). Free memory was 144.2MB in the beginning and 237.5MB in the end (delta: -93.3MB). Peak memory consumption was 60.6MB. Max. memory is 16.1GB. [2023-11-06 20:29:58,414 INFO L158 Benchmark]: CDTParser took 0.29ms. Allocated memory is still 142.6MB. Free memory is still 84.3MB. There was no memory consumed. Max. memory is 16.1GB. [2023-11-06 20:29:58,414 INFO L158 Benchmark]: CACSL2BoogieTranslator took 230.68ms. Allocated memory is still 190.8MB. Free memory was 143.4MB in the beginning and 133.7MB in the end (delta: 9.7MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2023-11-06 20:29:58,415 INFO L158 Benchmark]: Boogie Procedure Inliner took 47.77ms. Allocated memory is still 190.8MB. Free memory was 133.7MB in the beginning and 132.4MB in the end (delta: 1.3MB). There was no memory consumed. Max. memory is 16.1GB. [2023-11-06 20:29:58,415 INFO L158 Benchmark]: Boogie Preprocessor took 28.62ms. Allocated memory is still 190.8MB. Free memory was 132.4MB in the beginning and 130.8MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2023-11-06 20:29:58,415 INFO L158 Benchmark]: RCFGBuilder took 492.79ms. Allocated memory is still 190.8MB. Free memory was 130.8MB in the beginning and 114.1MB in the end (delta: 16.8MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. [2023-11-06 20:29:58,416 INFO L158 Benchmark]: TraceAbstraction took 23846.82ms. Allocated memory was 190.8MB in the beginning and 343.9MB in the end (delta: 153.1MB). Free memory was 113.6MB in the beginning and 240.4MB in the end (delta: -126.9MB). Peak memory consumption was 29.1MB. Max. memory is 16.1GB. [2023-11-06 20:29:58,416 INFO L158 Benchmark]: Witness Printer took 88.23ms. Allocated memory is still 343.9MB. Free memory was 240.4MB in the beginning and 237.5MB in the end (delta: 2.9MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2023-11-06 20:29:58,418 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.29ms. Allocated memory is still 142.6MB. Free memory is still 84.3MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 230.68ms. Allocated memory is still 190.8MB. Free memory was 143.4MB in the beginning and 133.7MB in the end (delta: 9.7MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 47.77ms. Allocated memory is still 190.8MB. Free memory was 133.7MB in the beginning and 132.4MB in the end (delta: 1.3MB). There was no memory consumed. Max. memory is 16.1GB. * Boogie Preprocessor took 28.62ms. Allocated memory is still 190.8MB. Free memory was 132.4MB in the beginning and 130.8MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 492.79ms. Allocated memory is still 190.8MB. Free memory was 130.8MB in the beginning and 114.1MB in the end (delta: 16.8MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. * TraceAbstraction took 23846.82ms. Allocated memory was 190.8MB in the beginning and 343.9MB in the end (delta: 153.1MB). Free memory was 113.6MB in the beginning and 240.4MB in the end (delta: -126.9MB). Peak memory consumption was 29.1MB. Max. memory is 16.1GB. * Witness Printer took 88.23ms. Allocated memory is still 343.9MB. Free memory was 240.4MB in the beginning and 237.5MB in the end (delta: 2.9MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 42]: free always succeeds For all program executions holds that free always succeeds at this location - PositiveResult [Line: 42]: free always succeeds For all program executions holds that free always succeeds at this location - PositiveResult [Line: 42]: free always succeeds For all program executions holds that free always succeeds at this location - PositiveResult [Line: 26]: all allocated memory was freed For all program executions holds that all allocated memory was freed at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 40 locations, 18 error locations. Started 1 CEGAR loops. OverallTime: 23.8s, OverallIterations: 22, TraceHistogramMax: 6, PathProgramHistogramMax: 5, EmptinessCheckTime: 0.0s, AutomataDifference: 6.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 716 SdHoareTripleChecker+Valid, 3.0s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 707 mSDsluCounter, 971 SdHoareTripleChecker+Invalid, 2.6s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 652 mSDsCounter, 50 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 3370 IncrementalHoareTripleChecker+Invalid, 3420 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 50 mSolverCounterUnsat, 319 mSDtfsCounter, 3370 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 716 GetRequests, 357 SyntacticMatches, 19 SemanticMatches, 340 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2056 ImplicationChecksByTransitivity, 8.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=66occurred in iteration=19, InterpolantAutomatonStates: 200, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 22 MinimizatonAttempts, 91 StatesRemovedByMinimization, 12 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.2s SsaConstructionTime, 0.6s SatisfiabilityAnalysisTime, 9.8s InterpolantComputationTime, 615 NumberOfCodeBlocks, 575 NumberOfCodeBlocksAsserted, 36 NumberOfCheckSat, 801 ConstructedInterpolants, 0 QuantifiedInterpolants, 6529 SizeOfPredicates, 72 NumberOfNonLiveVariables, 1225 ConjunctsInSsa, 181 ConjunctsInUnsatCore, 43 InterpolantComputations, 12 PerfectInterpolantSequences, 403/670 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: OVERALL_TIME: 0.8s, ICFG_INTERPRETER_ENTERED_PROCEDURES: 4, DAG_INTERPRETER_EARLY_EXIT_QUERIES_NONTRIVIAL: 24, DAG_INTERPRETER_EARLY_EXITS: 1, TOOLS_POST_APPLICATIONS: 42, TOOLS_POST_TIME: 0.6s, TOOLS_POST_CALL_APPLICATIONS: 2, TOOLS_POST_CALL_TIME: 0.0s, TOOLS_POST_RETURN_APPLICATIONS: 0, TOOLS_POST_RETURN_TIME: 0.0s, TOOLS_QUANTIFIERELIM_APPLICATIONS: 44, TOOLS_QUANTIFIERELIM_TIME: 0.6s, TOOLS_QUANTIFIERELIM_MAX_TIME: 0.1s, FLUID_QUERY_TIME: 0.0s, FLUID_QUERIES: 90, FLUID_YES_ANSWERS: 0, DOMAIN_JOIN_APPLICATIONS: 6, DOMAIN_JOIN_TIME: 0.0s, DOMAIN_ALPHA_APPLICATIONS: 0, DOMAIN_ALPHA_TIME: 0.0s, DOMAIN_WIDEN_APPLICATIONS: 6, DOMAIN_WIDEN_TIME: 0.1s, DOMAIN_ISSUBSETEQ_APPLICATIONS: 9, DOMAIN_ISSUBSETEQ_TIME: 0.0s, DOMAIN_ISBOTTOM_APPLICATIONS: 24, DOMAIN_ISBOTTOM_TIME: 0.0s, LOOP_SUMMARIZER_APPLICATIONS: 3, LOOP_SUMMARIZER_CACHE_MISSES: 3, LOOP_SUMMARIZER_OVERALL_TIME: 0.5s, LOOP_SUMMARIZER_NEW_COMPUTATION_TIME: 0.5s, LOOP_SUMMARIZER_FIXPOINT_ITERATIONS: 9, CALL_SUMMARIZER_APPLICATIONS: 0, CALL_SUMMARIZER_CACHE_MISSES: 0, CALL_SUMMARIZER_OVERALL_TIME: 0.0s, CALL_SUMMARIZER_NEW_COMPUTATION_TIME: 0.0s, PROCEDURE_GRAPH_BUILDER_TIME: 0.0s, PATH_EXPR_TIME: 0.0s, REGEX_TO_DAG_TIME: 0.0s, DAG_COMPRESSION_TIME: 0.0s, DAG_COMPRESSION_PROCESSED_NODES: 187, DAG_COMPRESSION_RETAINED_NODES: 78, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 18 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2023-11-06 20:29:58,451 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a2dadde-11b6-4dbe-b567-a97f271b829d/bin/utaipan-verify-FOvIYxoinp/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: TRUE