./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/termination-15/cstrpbrk_reverse_alloca.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_360c3138-ad9c-477c-acdd-5ab0a55812f1/bin/utaipan-verify-FOvIYxoinp/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_360c3138-ad9c-477c-acdd-5ab0a55812f1/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_360c3138-ad9c-477c-acdd-5ab0a55812f1/bin/utaipan-verify-FOvIYxoinp/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_360c3138-ad9c-477c-acdd-5ab0a55812f1/bin/utaipan-verify-FOvIYxoinp/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/termination-15/cstrpbrk_reverse_alloca.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_360c3138-ad9c-477c-acdd-5ab0a55812f1/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_360c3138-ad9c-477c-acdd-5ab0a55812f1/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 b6d1b460be78c3f5e029d54d0a7fa22600d3741ab7318d086bc890d48e08ce26 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-e7bb482 [2023-11-06 21:01:59,837 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-06 21:01:59,986 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_360c3138-ad9c-477c-acdd-5ab0a55812f1/bin/utaipan-verify-FOvIYxoinp/config/svcomp-DerefFreeMemtrack-64bit-Taipan_Default.epf [2023-11-06 21:01:59,999 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-06 21:02:00,001 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-06 21:02:00,048 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-06 21:02:00,049 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-06 21:02:00,050 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-06 21:02:00,051 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-06 21:02:00,057 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-06 21:02:00,058 INFO L153 SettingsManager]: * User list type=DISABLED [2023-11-06 21:02:00,059 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-11-06 21:02:00,060 INFO L153 SettingsManager]: * Explicit value domain=true [2023-11-06 21:02:00,062 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-11-06 21:02:00,063 INFO L153 SettingsManager]: * Octagon Domain=false [2023-11-06 21:02:00,063 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-11-06 21:02:00,064 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-11-06 21:02:00,065 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-11-06 21:02:00,066 INFO L153 SettingsManager]: * Interval Domain=false [2023-11-06 21:02:00,066 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-11-06 21:02:00,067 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-11-06 21:02:00,068 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-11-06 21:02:00,068 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-06 21:02:00,069 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-06 21:02:00,070 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-06 21:02:00,071 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-06 21:02:00,071 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-06 21:02:00,072 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-11-06 21:02:00,073 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2023-11-06 21:02:00,073 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-11-06 21:02:00,075 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-06 21:02:00,075 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-11-06 21:02:00,076 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-06 21:02:00,076 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-06 21:02:00,077 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-06 21:02:00,077 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-06 21:02:00,077 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-06 21:02:00,078 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-06 21:02:00,078 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-06 21:02:00,079 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-11-06 21:02:00,079 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-06 21:02:00,080 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-11-06 21:02:00,080 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-06 21:02:00,080 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_360c3138-ad9c-477c-acdd-5ab0a55812f1/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_360c3138-ad9c-477c-acdd-5ab0a55812f1/bin/utaipan-verify-FOvIYxoinp Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> b6d1b460be78c3f5e029d54d0a7fa22600d3741ab7318d086bc890d48e08ce26 [2023-11-06 21:02:00,452 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-06 21:02:00,495 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-06 21:02:00,499 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-06 21:02:00,500 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-06 21:02:00,501 INFO L274 PluginConnector]: CDTParser initialized [2023-11-06 21:02:00,503 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_360c3138-ad9c-477c-acdd-5ab0a55812f1/bin/utaipan-verify-FOvIYxoinp/../../sv-benchmarks/c/termination-15/cstrpbrk_reverse_alloca.i [2023-11-06 21:02:03,880 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-06 21:02:04,235 INFO L384 CDTParser]: Found 1 translation units. [2023-11-06 21:02:04,236 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_360c3138-ad9c-477c-acdd-5ab0a55812f1/sv-benchmarks/c/termination-15/cstrpbrk_reverse_alloca.i [2023-11-06 21:02:04,253 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_360c3138-ad9c-477c-acdd-5ab0a55812f1/bin/utaipan-verify-FOvIYxoinp/data/0d3e5f398/540126b53b8d43aba69b0a58b44e5321/FLAGc1994707b [2023-11-06 21:02:04,275 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_360c3138-ad9c-477c-acdd-5ab0a55812f1/bin/utaipan-verify-FOvIYxoinp/data/0d3e5f398/540126b53b8d43aba69b0a58b44e5321 [2023-11-06 21:02:04,282 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-06 21:02:04,283 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-06 21:02:04,287 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-06 21:02:04,288 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-06 21:02:04,293 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-06 21:02:04,294 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 09:02:04" (1/1) ... [2023-11-06 21:02:04,296 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4e479bd3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:02:04, skipping insertion in model container [2023-11-06 21:02:04,296 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 09:02:04" (1/1) ... [2023-11-06 21:02:04,363 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-06 21:02:04,717 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-06 21:02:04,730 INFO L202 MainTranslator]: Completed pre-run [2023-11-06 21:02:04,777 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-06 21:02:04,821 INFO L206 MainTranslator]: Completed translation [2023-11-06 21:02:04,822 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:02:04 WrapperNode [2023-11-06 21:02:04,822 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-06 21:02:04,823 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-06 21:02:04,824 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-06 21:02:04,824 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-06 21:02:04,831 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:02:04" (1/1) ... [2023-11-06 21:02:04,855 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:02:04" (1/1) ... [2023-11-06 21:02:04,889 INFO L138 Inliner]: procedures = 152, calls = 16, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 82 [2023-11-06 21:02:04,890 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-06 21:02:04,890 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-06 21:02:04,891 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-06 21:02:04,891 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-06 21:02:04,901 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:02:04" (1/1) ... [2023-11-06 21:02:04,901 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:02:04" (1/1) ... [2023-11-06 21:02:04,916 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:02:04" (1/1) ... [2023-11-06 21:02:04,917 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:02:04" (1/1) ... [2023-11-06 21:02:04,922 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:02:04" (1/1) ... [2023-11-06 21:02:04,939 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:02:04" (1/1) ... [2023-11-06 21:02:04,940 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:02:04" (1/1) ... [2023-11-06 21:02:04,942 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:02:04" (1/1) ... [2023-11-06 21:02:04,945 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-06 21:02:04,948 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-06 21:02:04,954 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-06 21:02:04,954 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-06 21:02:04,955 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:02:04" (1/1) ... [2023-11-06 21:02:04,963 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-06 21:02:04,976 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_360c3138-ad9c-477c-acdd-5ab0a55812f1/bin/utaipan-verify-FOvIYxoinp/z3 [2023-11-06 21:02:04,994 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_360c3138-ad9c-477c-acdd-5ab0a55812f1/bin/utaipan-verify-FOvIYxoinp/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-06 21:02:05,026 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_360c3138-ad9c-477c-acdd-5ab0a55812f1/bin/utaipan-verify-FOvIYxoinp/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-06 21:02:05,035 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-06 21:02:05,035 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-06 21:02:05,035 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-06 21:02:05,035 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-06 21:02:05,036 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-06 21:02:05,036 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-06 21:02:05,124 INFO L236 CfgBuilder]: Building ICFG [2023-11-06 21:02:05,127 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-06 21:02:05,424 INFO L277 CfgBuilder]: Performing block encoding [2023-11-06 21:02:05,489 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-06 21:02:05,489 INFO L302 CfgBuilder]: Removed 2 assume(true) statements. [2023-11-06 21:02:05,491 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 09:02:05 BoogieIcfgContainer [2023-11-06 21:02:05,492 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-06 21:02:05,494 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-06 21:02:05,495 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-06 21:02:05,498 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-06 21:02:05,498 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 09:02:04" (1/3) ... [2023-11-06 21:02:05,499 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@212d80e7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 09:02:05, skipping insertion in model container [2023-11-06 21:02:05,499 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:02:04" (2/3) ... [2023-11-06 21:02:05,499 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@212d80e7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 09:02:05, skipping insertion in model container [2023-11-06 21:02:05,500 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 09:02:05" (3/3) ... [2023-11-06 21:02:05,501 INFO L112 eAbstractionObserver]: Analyzing ICFG cstrpbrk_reverse_alloca.i [2023-11-06 21:02:05,517 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-06 21:02:05,518 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 15 error locations. [2023-11-06 21:02:05,557 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-06 21:02:05,563 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;@60dfbf2d, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-06 21:02:05,564 INFO L358 AbstractCegarLoop]: Starting to check reachability of 15 error locations. [2023-11-06 21:02:05,568 INFO L276 IsEmpty]: Start isEmpty. Operand has 31 states, 15 states have (on average 2.4) internal successors, (36), 30 states have internal predecessors, (36), 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 21:02:05,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2023-11-06 21:02:05,573 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 21:02:05,574 INFO L195 NwaCegarLoop]: trace histogram [1, 1] [2023-11-06 21:02:05,574 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2023-11-06 21:02:05,579 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:02:05,579 INFO L85 PathProgramCache]: Analyzing trace with hash 3923, now seen corresponding path program 1 times [2023-11-06 21:02:05,589 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-06 21:02:05,589 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [662662609] [2023-11-06 21:02:05,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:02:05,590 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:02:05,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:02:05,975 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 21:02:05,976 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-06 21:02:05,976 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [662662609] [2023-11-06 21:02:05,977 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [662662609] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 21:02:05,977 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 21:02:05,977 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-06 21:02:05,979 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1834785518] [2023-11-06 21:02:05,980 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 21:02:05,985 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 21:02:05,985 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-06 21:02:06,012 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 21:02:06,012 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 21:02:06,015 INFO L87 Difference]: Start difference. First operand has 31 states, 15 states have (on average 2.4) internal successors, (36), 30 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 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 21:02:06,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 21:02:06,102 INFO L93 Difference]: Finished difference Result 30 states and 33 transitions. [2023-11-06 21:02:06,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 21:02:06,105 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 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 2 [2023-11-06 21:02:06,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 21:02:06,111 INFO L225 Difference]: With dead ends: 30 [2023-11-06 21:02:06,111 INFO L226 Difference]: Without dead ends: 29 [2023-11-06 21:02:06,113 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 21:02:06,116 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 28 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 15 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-06 21:02:06,117 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 15 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-06 21:02:06,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2023-11-06 21:02:06,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2023-11-06 21:02:06,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 15 states have (on average 2.1333333333333333) internal successors, (32), 28 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:02:06,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 32 transitions. [2023-11-06 21:02:06,148 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 32 transitions. Word has length 2 [2023-11-06 21:02:06,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 21:02:06,148 INFO L495 AbstractCegarLoop]: Abstraction has 29 states and 32 transitions. [2023-11-06 21:02:06,149 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 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 21:02:06,149 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 32 transitions. [2023-11-06 21:02:06,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2023-11-06 21:02:06,149 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 21:02:06,150 INFO L195 NwaCegarLoop]: trace histogram [1, 1] [2023-11-06 21:02:06,150 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-06 21:02:06,150 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2023-11-06 21:02:06,151 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:02:06,151 INFO L85 PathProgramCache]: Analyzing trace with hash 3924, now seen corresponding path program 1 times [2023-11-06 21:02:06,152 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-06 21:02:06,152 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [112601192] [2023-11-06 21:02:06,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:02:06,152 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:02:06,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:02:06,544 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 21:02:06,545 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-06 21:02:06,546 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [112601192] [2023-11-06 21:02:06,546 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [112601192] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 21:02:06,547 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 21:02:06,547 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-06 21:02:06,548 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [894780045] [2023-11-06 21:02:06,548 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 21:02:06,549 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 21:02:06,551 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-06 21:02:06,551 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 21:02:06,552 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 21:02:06,552 INFO L87 Difference]: Start difference. First operand 29 states and 32 transitions. Second operand has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 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 21:02:06,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 21:02:06,619 INFO L93 Difference]: Finished difference Result 28 states and 31 transitions. [2023-11-06 21:02:06,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 21:02:06,620 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 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 2 [2023-11-06 21:02:06,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 21:02:06,621 INFO L225 Difference]: With dead ends: 28 [2023-11-06 21:02:06,621 INFO L226 Difference]: Without dead ends: 28 [2023-11-06 21:02:06,627 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 21:02:06,629 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 3 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-06 21:02:06,631 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 38 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-06 21:02:06,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2023-11-06 21:02:06,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2023-11-06 21:02:06,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 15 states have (on average 2.066666666666667) internal successors, (31), 27 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:02:06,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 31 transitions. [2023-11-06 21:02:06,639 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 31 transitions. Word has length 2 [2023-11-06 21:02:06,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 21:02:06,640 INFO L495 AbstractCegarLoop]: Abstraction has 28 states and 31 transitions. [2023-11-06 21:02:06,640 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 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 21:02:06,640 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 31 transitions. [2023-11-06 21:02:06,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2023-11-06 21:02:06,641 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 21:02:06,641 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2023-11-06 21:02:06,641 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-06 21:02:06,642 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2023-11-06 21:02:06,642 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:02:06,643 INFO L85 PathProgramCache]: Analyzing trace with hash 121602, now seen corresponding path program 1 times [2023-11-06 21:02:06,643 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-06 21:02:06,643 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1666642734] [2023-11-06 21:02:06,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:02:06,644 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:02:06,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:02:06,802 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 21:02:06,802 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-06 21:02:06,803 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1666642734] [2023-11-06 21:02:06,803 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1666642734] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 21:02:06,803 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 21:02:06,803 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-06 21:02:06,804 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1480585098] [2023-11-06 21:02:06,804 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 21:02:06,804 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-06 21:02:06,805 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-06 21:02:06,805 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-06 21:02:06,806 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-06 21:02:06,806 INFO L87 Difference]: Start difference. First operand 28 states and 31 transitions. Second operand has 4 states, 3 states have (on average 1.0) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:02:06,878 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 21:02:06,878 INFO L93 Difference]: Finished difference Result 27 states and 30 transitions. [2023-11-06 21:02:06,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 21:02:06,879 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 1.0) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 3 [2023-11-06 21:02:06,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 21:02:06,880 INFO L225 Difference]: With dead ends: 27 [2023-11-06 21:02:06,880 INFO L226 Difference]: Without dead ends: 27 [2023-11-06 21:02:06,880 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-06 21:02:06,889 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 51 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 14 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-06 21:02:06,891 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [51 Valid, 14 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-06 21:02:06,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2023-11-06 21:02:06,899 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2023-11-06 21:02:06,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 15 states have (on average 2.0) internal successors, (30), 26 states have internal predecessors, (30), 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 21:02:06,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 30 transitions. [2023-11-06 21:02:06,903 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 30 transitions. Word has length 3 [2023-11-06 21:02:06,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 21:02:06,903 INFO L495 AbstractCegarLoop]: Abstraction has 27 states and 30 transitions. [2023-11-06 21:02:06,905 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 1.0) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:02:06,905 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 30 transitions. [2023-11-06 21:02:06,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2023-11-06 21:02:06,910 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 21:02:06,910 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2023-11-06 21:02:06,911 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-06 21:02:06,911 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2023-11-06 21:02:06,912 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:02:06,915 INFO L85 PathProgramCache]: Analyzing trace with hash 121603, now seen corresponding path program 1 times [2023-11-06 21:02:06,916 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-06 21:02:06,917 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [614998970] [2023-11-06 21:02:06,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:02:06,917 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:02:06,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:02:07,093 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 21:02:07,094 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-06 21:02:07,094 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [614998970] [2023-11-06 21:02:07,095 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [614998970] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 21:02:07,095 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 21:02:07,095 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-06 21:02:07,095 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1960795675] [2023-11-06 21:02:07,095 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 21:02:07,096 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 21:02:07,096 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-06 21:02:07,099 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 21:02:07,099 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 21:02:07,099 INFO L87 Difference]: Start difference. First operand 27 states and 30 transitions. Second operand has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:02:07,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 21:02:07,151 INFO L93 Difference]: Finished difference Result 26 states and 29 transitions. [2023-11-06 21:02:07,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 21:02:07,152 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 21:02:07,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 21:02:07,153 INFO L225 Difference]: With dead ends: 26 [2023-11-06 21:02:07,153 INFO L226 Difference]: Without dead ends: 26 [2023-11-06 21:02:07,154 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 21:02:07,162 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 0 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-06 21:02:07,164 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 37 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-06 21:02:07,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2023-11-06 21:02:07,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2023-11-06 21:02:07,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 25 states have internal predecessors, (29), 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 21:02:07,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 29 transitions. [2023-11-06 21:02:07,173 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 29 transitions. Word has length 3 [2023-11-06 21:02:07,173 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 21:02:07,173 INFO L495 AbstractCegarLoop]: Abstraction has 26 states and 29 transitions. [2023-11-06 21:02:07,174 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 21:02:07,174 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 29 transitions. [2023-11-06 21:02:07,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2023-11-06 21:02:07,174 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 21:02:07,175 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2023-11-06 21:02:07,175 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-06 21:02:07,175 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2023-11-06 21:02:07,176 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:02:07,176 INFO L85 PathProgramCache]: Analyzing trace with hash 3771828, now seen corresponding path program 1 times [2023-11-06 21:02:07,176 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-06 21:02:07,177 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1091022252] [2023-11-06 21:02:07,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:02:07,177 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:02:07,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:02:07,284 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 21:02:07,285 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-06 21:02:07,285 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1091022252] [2023-11-06 21:02:07,285 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1091022252] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 21:02:07,286 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 21:02:07,286 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-06 21:02:07,287 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [367709497] [2023-11-06 21:02:07,287 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 21:02:07,288 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-06 21:02:07,290 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-06 21:02:07,292 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-06 21:02:07,293 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-06 21:02:07,294 INFO L87 Difference]: Start difference. First operand 26 states and 29 transitions. Second operand has 4 states, 3 states have (on average 1.3333333333333333) 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 21:02:07,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 21:02:07,366 INFO L93 Difference]: Finished difference Result 24 states and 27 transitions. [2023-11-06 21:02:07,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-06 21:02:07,367 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 1.3333333333333333) 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 21:02:07,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 21:02:07,370 INFO L225 Difference]: With dead ends: 24 [2023-11-06 21:02:07,370 INFO L226 Difference]: Without dead ends: 24 [2023-11-06 21:02:07,370 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 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 21:02:07,371 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 43 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 11 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-06 21:02:07,372 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [43 Valid, 11 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-06 21:02:07,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2023-11-06 21:02:07,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2023-11-06 21:02:07,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 15 states have (on average 1.8) internal successors, (27), 23 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:02:07,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 27 transitions. [2023-11-06 21:02:07,391 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 27 transitions. Word has length 4 [2023-11-06 21:02:07,392 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 21:02:07,392 INFO L495 AbstractCegarLoop]: Abstraction has 24 states and 27 transitions. [2023-11-06 21:02:07,392 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 1.3333333333333333) 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 21:02:07,392 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 27 transitions. [2023-11-06 21:02:07,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2023-11-06 21:02:07,393 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 21:02:07,394 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2023-11-06 21:02:07,394 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-06 21:02:07,394 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2023-11-06 21:02:07,395 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:02:07,396 INFO L85 PathProgramCache]: Analyzing trace with hash 3771829, now seen corresponding path program 1 times [2023-11-06 21:02:07,396 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-06 21:02:07,396 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [482655214] [2023-11-06 21:02:07,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:02:07,397 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:02:07,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:02:07,826 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 21:02:07,826 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-06 21:02:07,826 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [482655214] [2023-11-06 21:02:07,826 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [482655214] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 21:02:07,827 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 21:02:07,827 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-06 21:02:07,827 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1005684186] [2023-11-06 21:02:07,827 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 21:02:07,828 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-06 21:02:07,828 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-06 21:02:07,828 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-06 21:02:07,829 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-06 21:02:07,829 INFO L87 Difference]: Start difference. First operand 24 states and 27 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 21:02:07,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 21:02:07,926 INFO L93 Difference]: Finished difference Result 24 states and 27 transitions. [2023-11-06 21:02:07,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-06 21:02:07,927 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 21:02:07,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 21:02:07,928 INFO L225 Difference]: With dead ends: 24 [2023-11-06 21:02:07,928 INFO L226 Difference]: Without dead ends: 24 [2023-11-06 21:02:07,928 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-11-06 21:02:07,929 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 20 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 45 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-06 21:02:07,930 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 38 Invalid, 45 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-06 21:02:07,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2023-11-06 21:02:07,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2023-11-06 21:02:07,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 16 states have (on average 1.6875) internal successors, (27), 23 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:02:07,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 27 transitions. [2023-11-06 21:02:07,934 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 27 transitions. Word has length 4 [2023-11-06 21:02:07,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 21:02:07,935 INFO L495 AbstractCegarLoop]: Abstraction has 24 states and 27 transitions. [2023-11-06 21:02:07,935 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 21:02:07,935 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 27 transitions. [2023-11-06 21:02:07,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2023-11-06 21:02:07,936 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 21:02:07,936 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:02:07,936 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-06 21:02:07,936 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2023-11-06 21:02:07,937 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:02:07,937 INFO L85 PathProgramCache]: Analyzing trace with hash 697382883, now seen corresponding path program 1 times [2023-11-06 21:02:07,937 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-06 21:02:07,938 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [580597617] [2023-11-06 21:02:07,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:02:07,938 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:02:07,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:02:08,020 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 21:02:08,020 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-06 21:02:08,021 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [580597617] [2023-11-06 21:02:08,021 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [580597617] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 21:02:08,021 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 21:02:08,021 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-06 21:02:08,021 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1003952820] [2023-11-06 21:02:08,022 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 21:02:08,022 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-06 21:02:08,022 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-06 21:02:08,023 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-06 21:02:08,023 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-06 21:02:08,023 INFO L87 Difference]: Start difference. First operand 24 states and 27 transitions. Second operand has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:02:08,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 21:02:08,073 INFO L93 Difference]: Finished difference Result 24 states and 28 transitions. [2023-11-06 21:02:08,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-06 21:02:08,074 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2023-11-06 21:02:08,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 21:02:08,074 INFO L225 Difference]: With dead ends: 24 [2023-11-06 21:02:08,074 INFO L226 Difference]: Without dead ends: 24 [2023-11-06 21:02:08,075 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 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 21:02:08,076 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 32 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 13 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-06 21:02:08,076 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [32 Valid, 13 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-06 21:02:08,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2023-11-06 21:02:08,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 21. [2023-11-06 21:02:08,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 16 states have (on average 1.5) internal successors, (24), 20 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:02:08,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 24 transitions. [2023-11-06 21:02:08,080 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 24 transitions. Word has length 7 [2023-11-06 21:02:08,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 21:02:08,080 INFO L495 AbstractCegarLoop]: Abstraction has 21 states and 24 transitions. [2023-11-06 21:02:08,081 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:02:08,081 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 24 transitions. [2023-11-06 21:02:08,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2023-11-06 21:02:08,082 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 21:02:08,082 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:02:08,082 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-11-06 21:02:08,082 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2023-11-06 21:02:08,083 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:02:08,083 INFO L85 PathProgramCache]: Analyzing trace with hash 697382884, now seen corresponding path program 1 times [2023-11-06 21:02:08,083 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-06 21:02:08,083 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1727025456] [2023-11-06 21:02:08,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:02:08,084 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:02:08,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:02:08,457 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 21:02:08,457 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-06 21:02:08,458 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1727025456] [2023-11-06 21:02:08,458 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1727025456] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 21:02:08,458 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 21:02:08,458 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-06 21:02:08,459 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [271714620] [2023-11-06 21:02:08,459 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 21:02:08,461 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-06 21:02:08,461 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-06 21:02:08,461 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-06 21:02:08,462 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-06 21:02:08,462 INFO L87 Difference]: Start difference. First operand 21 states and 24 transitions. Second operand has 5 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:02:08,560 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 21:02:08,561 INFO L93 Difference]: Finished difference Result 23 states and 27 transitions. [2023-11-06 21:02:08,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-06 21:02:08,562 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2023-11-06 21:02:08,562 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 21:02:08,563 INFO L225 Difference]: With dead ends: 23 [2023-11-06 21:02:08,563 INFO L226 Difference]: Without dead ends: 23 [2023-11-06 21:02:08,563 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-11-06 21:02:08,566 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 28 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-06 21:02:08,567 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 26 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-06 21:02:08,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2023-11-06 21:02:08,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 20. [2023-11-06 21:02:08,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 17 states have (on average 1.3529411764705883) internal successors, (23), 19 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:02:08,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 23 transitions. [2023-11-06 21:02:08,574 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 23 transitions. Word has length 7 [2023-11-06 21:02:08,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 21:02:08,574 INFO L495 AbstractCegarLoop]: Abstraction has 20 states and 23 transitions. [2023-11-06 21:02:08,575 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:02:08,575 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 23 transitions. [2023-11-06 21:02:08,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2023-11-06 21:02:08,576 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 21:02:08,576 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:02:08,576 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-11-06 21:02:08,576 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2023-11-06 21:02:08,577 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:02:08,577 INFO L85 PathProgramCache]: Analyzing trace with hash 143965859, now seen corresponding path program 1 times [2023-11-06 21:02:08,577 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-06 21:02:08,578 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1930595188] [2023-11-06 21:02:08,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:02:08,578 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:02:08,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:02:08,775 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 21:02:08,776 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-06 21:02:08,777 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1930595188] [2023-11-06 21:02:08,778 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1930595188] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 21:02:08,778 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 21:02:08,778 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-06 21:02:08,778 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [787795915] [2023-11-06 21:02:08,778 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 21:02:08,779 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-06 21:02:08,779 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-06 21:02:08,780 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-06 21:02:08,780 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-06 21:02:08,781 INFO L87 Difference]: Start difference. First operand 20 states and 23 transitions. Second operand has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:02:08,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 21:02:08,822 INFO L93 Difference]: Finished difference Result 19 states and 22 transitions. [2023-11-06 21:02:08,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-06 21:02:08,824 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2023-11-06 21:02:08,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 21:02:08,825 INFO L225 Difference]: With dead ends: 19 [2023-11-06 21:02:08,825 INFO L226 Difference]: Without dead ends: 16 [2023-11-06 21:02:08,826 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-06 21:02:08,829 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 13 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 20 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-06 21:02:08,830 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 20 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-06 21:02:08,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2023-11-06 21:02:08,832 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2023-11-06 21:02:08,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 14 states have (on average 1.2857142857142858) internal successors, (18), 15 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:02:08,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 18 transitions. [2023-11-06 21:02:08,834 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 18 transitions. Word has length 8 [2023-11-06 21:02:08,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 21:02:08,834 INFO L495 AbstractCegarLoop]: Abstraction has 16 states and 18 transitions. [2023-11-06 21:02:08,835 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:02:08,835 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 18 transitions. [2023-11-06 21:02:08,835 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2023-11-06 21:02:08,837 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 21:02:08,837 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:02:08,837 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-11-06 21:02:08,837 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2023-11-06 21:02:08,838 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:02:08,838 INFO L85 PathProgramCache]: Analyzing trace with hash 978021303, now seen corresponding path program 1 times [2023-11-06 21:02:08,838 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-06 21:02:08,839 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2028379501] [2023-11-06 21:02:08,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:02:08,839 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:02:08,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:02:08,891 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 21:02:08,892 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-06 21:02:08,892 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2028379501] [2023-11-06 21:02:08,892 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2028379501] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 21:02:08,892 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 21:02:08,893 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-06 21:02:08,893 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [79118133] [2023-11-06 21:02:08,893 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 21:02:08,894 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 21:02:08,894 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-06 21:02:08,894 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 21:02:08,895 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 21:02:08,895 INFO L87 Difference]: Start difference. First operand 16 states and 18 transitions. Second operand has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:02:08,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 21:02:08,928 INFO L93 Difference]: Finished difference Result 17 states and 19 transitions. [2023-11-06 21:02:08,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 21:02:08,929 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2023-11-06 21:02:08,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 21:02:08,931 INFO L225 Difference]: With dead ends: 17 [2023-11-06 21:02:08,931 INFO L226 Difference]: Without dead ends: 17 [2023-11-06 21:02:08,931 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 21:02:08,932 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 0 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 15 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-06 21:02:08,933 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 15 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-06 21:02:08,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2023-11-06 21:02:08,934 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2023-11-06 21:02:08,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 15 states have (on average 1.2666666666666666) internal successors, (19), 16 states have internal predecessors, (19), 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 21:02:08,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 19 transitions. [2023-11-06 21:02:08,935 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 19 transitions. Word has length 10 [2023-11-06 21:02:08,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 21:02:08,936 INFO L495 AbstractCegarLoop]: Abstraction has 17 states and 19 transitions. [2023-11-06 21:02:08,936 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:02:08,936 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 19 transitions. [2023-11-06 21:02:08,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2023-11-06 21:02:08,937 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 21:02:08,937 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:02:08,937 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-11-06 21:02:08,937 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2023-11-06 21:02:08,938 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:02:08,938 INFO L85 PathProgramCache]: Analyzing trace with hash 253734179, now seen corresponding path program 1 times [2023-11-06 21:02:08,938 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-06 21:02:08,938 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1501272636] [2023-11-06 21:02:08,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:02:08,939 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:02:08,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:02:09,457 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 21:02:09,457 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-06 21:02:09,457 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1501272636] [2023-11-06 21:02:09,458 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1501272636] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 21:02:09,458 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1958868555] [2023-11-06 21:02:09,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:02:09,458 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:02:09,459 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_360c3138-ad9c-477c-acdd-5ab0a55812f1/bin/utaipan-verify-FOvIYxoinp/z3 [2023-11-06 21:02:09,463 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_360c3138-ad9c-477c-acdd-5ab0a55812f1/bin/utaipan-verify-FOvIYxoinp/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 21:02:09,473 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_360c3138-ad9c-477c-acdd-5ab0a55812f1/bin/utaipan-verify-FOvIYxoinp/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-06 21:02:09,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:02:09,590 INFO L262 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 26 conjunts are in the unsatisfiable core [2023-11-06 21:02:09,597 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 21:02:09,689 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-11-06 21:02:09,775 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 21:02:09,776 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 25 [2023-11-06 21:02:09,839 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 21:02:09,839 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 21:02:09,946 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2023-11-06 21:02:09,967 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 10 treesize of output 8 [2023-11-06 21:02:09,974 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 14 treesize of output 12 [2023-11-06 21:02:09,993 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 21:02:09,994 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1958868555] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 21:02:09,994 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1884630868] [2023-11-06 21:02:10,018 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2023-11-06 21:02:10,018 INFO L166 IcfgInterpreter]: Building call graph [2023-11-06 21:02:10,024 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-06 21:02:10,031 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-06 21:02:10,031 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-06 21:02:12,884 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-06 21:02:15,680 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '630#(and (<= 2 |ULTIMATE.start_main_~nondetString2~0#1.base|) (<= 1 |#StackHeapBarrier|) (<= 2 |ULTIMATE.start_cstrpbrk_~s1#1.base|) (= |ULTIMATE.start_main_#t~malloc215#1.offset| 0) (<= 0 |ULTIMATE.start_cstrpbrk_~s1#1.offset|) (or (< |ULTIMATE.start_cstrpbrk_~s~0#1.offset| 0) (< (select |#length| |ULTIMATE.start_cstrpbrk_~s~0#1.base|) (+ |ULTIMATE.start_cstrpbrk_~s~0#1.offset| 1))) (<= 2 |ULTIMATE.start_main_#t~malloc216#1.base|) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.offset|) (= |ULTIMATE.start_main_#t~malloc216#1.offset| 0) (<= 1 |ULTIMATE.start_main_~length1~0#1|) (<= 2 |ULTIMATE.start_cstrpbrk_#in~s1#1.base|) (<= 2 |ULTIMATE.start_cstrpbrk_~sc1~0#1.base|) (<= 2 |ULTIMATE.start_cstrpbrk_~s~0#1.base|) (<= 2 |ULTIMATE.start_cstrpbrk_#in~s2#1.base|) (<= 0 |ULTIMATE.start_cstrpbrk_~sc1~0#1.offset|) (<= 2 |ULTIMATE.start_cstrpbrk_~s2#1.base|) (<= 2 |ULTIMATE.start_main_#t~malloc215#1.base|) (<= 2 |ULTIMATE.start_main_~nondetString1~0#1.base|) (<= 0 |ULTIMATE.start_cstrpbrk_#in~s1#1.offset|))' at error location [2023-11-06 21:02:15,680 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-06 21:02:15,681 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 21:02:15,681 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2023-11-06 21:02:15,681 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1985715038] [2023-11-06 21:02:15,681 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 21:02:15,682 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-06 21:02:15,682 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-06 21:02:15,683 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-06 21:02:15,683 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=426, Unknown=1, NotChecked=0, Total=506 [2023-11-06 21:02:15,684 INFO L87 Difference]: Start difference. First operand 17 states and 19 transitions. Second operand has 14 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:02:16,119 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 21:02:16,119 INFO L93 Difference]: Finished difference Result 36 states and 40 transitions. [2023-11-06 21:02:16,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-06 21:02:16,120 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2023-11-06 21:02:16,120 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 21:02:16,122 INFO L225 Difference]: With dead ends: 36 [2023-11-06 21:02:16,122 INFO L226 Difference]: Without dead ends: 36 [2023-11-06 21:02:16,123 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 14 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 181 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=162, Invalid=707, Unknown=1, NotChecked=0, Total=870 [2023-11-06 21:02:16,124 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 58 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 167 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 7 SdHoareTripleChecker+Invalid, 169 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 167 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-06 21:02:16,124 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [58 Valid, 7 Invalid, 169 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 167 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-06 21:02:16,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2023-11-06 21:02:16,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 15. [2023-11-06 21:02:16,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 14 states have (on average 1.2142857142857142) internal successors, (17), 14 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:02:16,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 17 transitions. [2023-11-06 21:02:16,132 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 17 transitions. Word has length 11 [2023-11-06 21:02:16,132 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 21:02:16,132 INFO L495 AbstractCegarLoop]: Abstraction has 15 states and 17 transitions. [2023-11-06 21:02:16,133 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:02:16,133 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 17 transitions. [2023-11-06 21:02:16,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2023-11-06 21:02:16,134 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 21:02:16,134 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:02:16,142 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_360c3138-ad9c-477c-acdd-5ab0a55812f1/bin/utaipan-verify-FOvIYxoinp/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-06 21:02:16,340 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_360c3138-ad9c-477c-acdd-5ab0a55812f1/bin/utaipan-verify-FOvIYxoinp/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:02:16,340 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2023-11-06 21:02:16,341 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:02:16,341 INFO L85 PathProgramCache]: Analyzing trace with hash -719403340, now seen corresponding path program 1 times [2023-11-06 21:02:16,341 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-06 21:02:16,341 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1256428002] [2023-11-06 21:02:16,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:02:16,342 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:02:16,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:02:16,530 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 21:02:16,531 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-06 21:02:16,532 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1256428002] [2023-11-06 21:02:16,532 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1256428002] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 21:02:16,532 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 21:02:16,533 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-11-06 21:02:16,533 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [947701298] [2023-11-06 21:02:16,533 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 21:02:16,533 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-06 21:02:16,534 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-06 21:02:16,536 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-06 21:02:16,536 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2023-11-06 21:02:16,537 INFO L87 Difference]: Start difference. First operand 15 states and 17 transitions. Second operand has 8 states, 8 states have (on average 1.5) internal successors, (12), 8 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:02:16,680 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 21:02:16,680 INFO L93 Difference]: Finished difference Result 19 states and 20 transitions. [2023-11-06 21:02:16,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-06 21:02:16,681 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 1.5) internal successors, (12), 8 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2023-11-06 21:02:16,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 21:02:16,682 INFO L225 Difference]: With dead ends: 19 [2023-11-06 21:02:16,682 INFO L226 Difference]: Without dead ends: 16 [2023-11-06 21:02:16,683 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2023-11-06 21:02:16,684 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 26 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 64 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 64 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 64 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-06 21:02:16,685 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 17 Invalid, 64 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 64 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-06 21:02:16,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2023-11-06 21:02:16,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 14. [2023-11-06 21:02:16,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14 states, 13 states have (on average 1.1538461538461537) internal successors, (15), 13 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:02:16,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 15 transitions. [2023-11-06 21:02:16,699 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 15 transitions. Word has length 12 [2023-11-06 21:02:16,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 21:02:16,699 INFO L495 AbstractCegarLoop]: Abstraction has 14 states and 15 transitions. [2023-11-06 21:02:16,700 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 1.5) internal successors, (12), 8 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:02:16,700 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 15 transitions. [2023-11-06 21:02:16,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2023-11-06 21:02:16,701 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 21:02:16,701 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:02:16,701 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-11-06 21:02:16,702 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2023-11-06 21:02:16,704 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:02:16,704 INFO L85 PathProgramCache]: Analyzing trace with hash -974627552, now seen corresponding path program 1 times [2023-11-06 21:02:16,705 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-06 21:02:16,705 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1593207078] [2023-11-06 21:02:16,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:02:16,705 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:02:16,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:02:17,151 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 21:02:17,152 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-06 21:02:17,153 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1593207078] [2023-11-06 21:02:17,153 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1593207078] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 21:02:17,153 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1061257149] [2023-11-06 21:02:17,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:02:17,153 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:02:17,154 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_360c3138-ad9c-477c-acdd-5ab0a55812f1/bin/utaipan-verify-FOvIYxoinp/z3 [2023-11-06 21:02:17,155 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_360c3138-ad9c-477c-acdd-5ab0a55812f1/bin/utaipan-verify-FOvIYxoinp/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 21:02:17,180 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_360c3138-ad9c-477c-acdd-5ab0a55812f1/bin/utaipan-verify-FOvIYxoinp/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-06 21:02:17,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:02:17,267 INFO L262 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 47 conjunts are in the unsatisfiable core [2023-11-06 21:02:17,272 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 21:02:17,326 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 10 treesize of output 8 [2023-11-06 21:02:17,374 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-11-06 21:02:17,425 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2023-11-06 21:02:17,482 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 21:02:17,483 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 18 [2023-11-06 21:02:17,548 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 21:02:17,548 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 21:02:17,676 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2023-11-06 21:02:17,755 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 45 treesize of output 38 [2023-11-06 21:02:17,804 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 21:02:17,804 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1061257149] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 21:02:17,805 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [744262438] [2023-11-06 21:02:17,808 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2023-11-06 21:02:17,808 INFO L166 IcfgInterpreter]: Building call graph [2023-11-06 21:02:17,808 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-06 21:02:17,809 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-06 21:02:17,809 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-06 21:02:23,847 INFO L180 IcfgInterpreter]: Interpretation finished