./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/termination-memory-alloca/java_Break-alloca.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version e7bb482b Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0842670f-2254-4118-a663-0cdb06513070/bin/utaipan-verify-FOvIYxoinp/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0842670f-2254-4118-a663-0cdb06513070/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_0842670f-2254-4118-a663-0cdb06513070/bin/utaipan-verify-FOvIYxoinp/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0842670f-2254-4118-a663-0cdb06513070/bin/utaipan-verify-FOvIYxoinp/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/termination-memory-alloca/java_Break-alloca.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0842670f-2254-4118-a663-0cdb06513070/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_0842670f-2254-4118-a663-0cdb06513070/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 103924553f8844e2e517be0615203791d7df69423e0df1cd576bc344a47cd3cc --- Real Ultimate output --- This is Ultimate 0.2.3-dev-e7bb482 [2023-11-06 20:59:41,371 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-06 20:59:41,491 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0842670f-2254-4118-a663-0cdb06513070/bin/utaipan-verify-FOvIYxoinp/config/svcomp-DerefFreeMemtrack-64bit-Taipan_Default.epf [2023-11-06 20:59:41,504 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-06 20:59:41,505 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-06 20:59:41,548 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-06 20:59:41,549 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-06 20:59:41,550 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-06 20:59:41,551 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-06 20:59:41,556 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-06 20:59:41,557 INFO L153 SettingsManager]: * User list type=DISABLED [2023-11-06 20:59:41,558 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-11-06 20:59:41,558 INFO L153 SettingsManager]: * Explicit value domain=true [2023-11-06 20:59:41,560 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-11-06 20:59:41,561 INFO L153 SettingsManager]: * Octagon Domain=false [2023-11-06 20:59:41,561 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-11-06 20:59:41,562 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-11-06 20:59:41,562 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-11-06 20:59:41,563 INFO L153 SettingsManager]: * Interval Domain=false [2023-11-06 20:59:41,563 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-11-06 20:59:41,564 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-11-06 20:59:41,564 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-11-06 20:59:41,565 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-06 20:59:41,565 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-06 20:59:41,566 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-06 20:59:41,567 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-06 20:59:41,567 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-06 20:59:41,568 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-11-06 20:59:41,568 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2023-11-06 20:59:41,569 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-11-06 20:59:41,570 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-06 20:59:41,570 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-11-06 20:59:41,571 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-06 20:59:41,571 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-06 20:59:41,571 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-06 20:59:41,571 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-06 20:59:41,572 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-06 20:59:41,572 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-06 20:59:41,572 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-06 20:59:41,573 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-11-06 20:59:41,573 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-06 20:59:41,573 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-11-06 20:59:41,574 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-06 20:59:41,574 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_0842670f-2254-4118-a663-0cdb06513070/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0842670f-2254-4118-a663-0cdb06513070/bin/utaipan-verify-FOvIYxoinp Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 103924553f8844e2e517be0615203791d7df69423e0df1cd576bc344a47cd3cc [2023-11-06 20:59:41,913 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-06 20:59:41,947 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-06 20:59:41,950 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-06 20:59:41,951 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-06 20:59:41,952 INFO L274 PluginConnector]: CDTParser initialized [2023-11-06 20:59:41,953 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0842670f-2254-4118-a663-0cdb06513070/bin/utaipan-verify-FOvIYxoinp/../../sv-benchmarks/c/termination-memory-alloca/java_Break-alloca.i [2023-11-06 20:59:45,114 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-06 20:59:45,434 INFO L384 CDTParser]: Found 1 translation units. [2023-11-06 20:59:45,435 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0842670f-2254-4118-a663-0cdb06513070/sv-benchmarks/c/termination-memory-alloca/java_Break-alloca.i [2023-11-06 20:59:45,449 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0842670f-2254-4118-a663-0cdb06513070/bin/utaipan-verify-FOvIYxoinp/data/69ed81445/1bcdf59b089d4c4b82c00c01ba9a158f/FLAG21e89ca5e [2023-11-06 20:59:45,464 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0842670f-2254-4118-a663-0cdb06513070/bin/utaipan-verify-FOvIYxoinp/data/69ed81445/1bcdf59b089d4c4b82c00c01ba9a158f [2023-11-06 20:59:45,467 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-06 20:59:45,469 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-06 20:59:45,470 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-06 20:59:45,471 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-06 20:59:45,477 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-06 20:59:45,478 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 08:59:45" (1/1) ... [2023-11-06 20:59:45,479 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7bd0bd7b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 08:59:45, skipping insertion in model container [2023-11-06 20:59:45,479 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 08:59:45" (1/1) ... [2023-11-06 20:59:45,547 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-06 20:59:45,819 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-06 20:59:45,832 INFO L202 MainTranslator]: Completed pre-run [2023-11-06 20:59:45,880 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-06 20:59:45,923 INFO L206 MainTranslator]: Completed translation [2023-11-06 20:59:45,923 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 08:59:45 WrapperNode [2023-11-06 20:59:45,923 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-06 20:59:45,925 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-06 20:59:45,925 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-06 20:59:45,926 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-06 20:59:45,933 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 08:59:45" (1/1) ... [2023-11-06 20:59:45,957 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 08:59:45" (1/1) ... [2023-11-06 20:59:45,980 INFO L138 Inliner]: procedures = 109, calls = 16, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 41 [2023-11-06 20:59:45,982 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-06 20:59:45,983 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-06 20:59:45,983 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-06 20:59:45,983 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-06 20:59:45,992 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 08:59:45" (1/1) ... [2023-11-06 20:59:45,993 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 08:59:45" (1/1) ... [2023-11-06 20:59:46,010 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 08:59:45" (1/1) ... [2023-11-06 20:59:46,011 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 08:59:45" (1/1) ... [2023-11-06 20:59:46,016 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 08:59:45" (1/1) ... [2023-11-06 20:59:46,020 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 08:59:45" (1/1) ... [2023-11-06 20:59:46,021 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 08:59:45" (1/1) ... [2023-11-06 20:59:46,022 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 08:59:45" (1/1) ... [2023-11-06 20:59:46,024 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-06 20:59:46,025 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-06 20:59:46,026 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-06 20:59:46,026 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-06 20:59:46,027 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 08:59:45" (1/1) ... [2023-11-06 20:59:46,033 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-06 20:59:46,045 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0842670f-2254-4118-a663-0cdb06513070/bin/utaipan-verify-FOvIYxoinp/z3 [2023-11-06 20:59:46,058 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0842670f-2254-4118-a663-0cdb06513070/bin/utaipan-verify-FOvIYxoinp/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-06 20:59:46,089 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0842670f-2254-4118-a663-0cdb06513070/bin/utaipan-verify-FOvIYxoinp/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-06 20:59:46,108 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-06 20:59:46,108 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-06 20:59:46,108 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-06 20:59:46,108 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-06 20:59:46,109 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-06 20:59:46,109 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-06 20:59:46,258 INFO L236 CfgBuilder]: Building ICFG [2023-11-06 20:59:46,261 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-06 20:59:46,536 INFO L277 CfgBuilder]: Performing block encoding [2023-11-06 20:59:46,566 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-06 20:59:46,566 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-11-06 20:59:46,569 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 08:59:46 BoogieIcfgContainer [2023-11-06 20:59:46,569 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-06 20:59:46,572 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-06 20:59:46,572 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-06 20:59:46,576 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-06 20:59:46,576 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 08:59:45" (1/3) ... [2023-11-06 20:59:46,577 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1a975ce6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 08:59:46, skipping insertion in model container [2023-11-06 20:59:46,577 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 08:59:45" (2/3) ... [2023-11-06 20:59:46,578 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1a975ce6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 08:59:46, skipping insertion in model container [2023-11-06 20:59:46,578 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 08:59:46" (3/3) ... [2023-11-06 20:59:46,579 INFO L112 eAbstractionObserver]: Analyzing ICFG java_Break-alloca.i [2023-11-06 20:59:46,601 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-06 20:59:46,602 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 17 error locations. [2023-11-06 20:59:46,652 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-06 20:59:46,659 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;@556eac0d, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-06 20:59:46,660 INFO L358 AbstractCegarLoop]: Starting to check reachability of 17 error locations. [2023-11-06 20:59:46,664 INFO L276 IsEmpty]: Start isEmpty. Operand has 30 states, 12 states have (on average 2.5833333333333335) internal successors, (31), 29 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 20:59:46,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2023-11-06 20:59:46,673 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 20:59:46,674 INFO L195 NwaCegarLoop]: trace histogram [1, 1] [2023-11-06 20:59:46,675 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2023-11-06 20:59:46,682 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 20:59:46,682 INFO L85 PathProgramCache]: Analyzing trace with hash 2732, now seen corresponding path program 1 times [2023-11-06 20:59:46,693 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-06 20:59:46,694 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1347007485] [2023-11-06 20:59:46,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 20:59:46,695 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 20:59:46,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 20:59:47,067 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 20:59:47,068 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-06 20:59:47,068 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1347007485] [2023-11-06 20:59:47,069 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1347007485] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 20:59:47,069 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 20:59:47,070 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-06 20:59:47,072 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [556577977] [2023-11-06 20:59:47,072 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 20:59:47,078 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 20:59:47,078 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-06 20:59:47,131 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 20:59:47,132 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 20:59:47,134 INFO L87 Difference]: Start difference. First operand has 30 states, 12 states have (on average 2.5833333333333335) internal successors, (31), 29 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) 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 20:59:47,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 20:59:47,233 INFO L93 Difference]: Finished difference Result 26 states and 26 transitions. [2023-11-06 20:59:47,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 20:59:47,236 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 20:59:47,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 20:59:47,245 INFO L225 Difference]: With dead ends: 26 [2023-11-06 20:59:47,245 INFO L226 Difference]: Without dead ends: 25 [2023-11-06 20:59:47,248 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 20:59:47,253 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 22 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 8 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-06 20:59:47,254 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 8 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-06 20:59:47,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2023-11-06 20:59:47,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2023-11-06 20:59:47,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 24 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 20:59:47,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 25 transitions. [2023-11-06 20:59:47,291 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 25 transitions. Word has length 2 [2023-11-06 20:59:47,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 20:59:47,292 INFO L495 AbstractCegarLoop]: Abstraction has 25 states and 25 transitions. [2023-11-06 20:59:47,292 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 20:59:47,294 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 25 transitions. [2023-11-06 20:59:47,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2023-11-06 20:59:47,295 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 20:59:47,295 INFO L195 NwaCegarLoop]: trace histogram [1, 1] [2023-11-06 20:59:47,296 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-06 20:59:47,297 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2023-11-06 20:59:47,298 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 20:59:47,299 INFO L85 PathProgramCache]: Analyzing trace with hash 2733, now seen corresponding path program 1 times [2023-11-06 20:59:47,299 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-06 20:59:47,299 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1460926593] [2023-11-06 20:59:47,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 20:59:47,300 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 20:59:47,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 20:59:47,517 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 20:59:47,517 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-06 20:59:47,518 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1460926593] [2023-11-06 20:59:47,518 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1460926593] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 20:59:47,518 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 20:59:47,518 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-06 20:59:47,519 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [775155533] [2023-11-06 20:59:47,519 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 20:59:47,520 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 20:59:47,521 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-06 20:59:47,521 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 20:59:47,522 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 20:59:47,522 INFO L87 Difference]: Start difference. First operand 25 states and 25 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 20:59:47,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 20:59:47,556 INFO L93 Difference]: Finished difference Result 21 states and 21 transitions. [2023-11-06 20:59:47,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 20:59:47,557 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 20:59:47,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 20:59:47,558 INFO L225 Difference]: With dead ends: 21 [2023-11-06 20:59:47,558 INFO L226 Difference]: Without dead ends: 21 [2023-11-06 20:59:47,559 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 20:59:47,561 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 20 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 8 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-06 20:59:47,562 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 8 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-06 20:59:47,563 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2023-11-06 20:59:47,565 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2023-11-06 20:59:47,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 12 states have (on average 1.75) internal successors, (21), 20 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 20:59:47,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 21 transitions. [2023-11-06 20:59:47,567 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 21 transitions. Word has length 2 [2023-11-06 20:59:47,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 20:59:47,567 INFO L495 AbstractCegarLoop]: Abstraction has 21 states and 21 transitions. [2023-11-06 20:59:47,567 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 20:59:47,568 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 21 transitions. [2023-11-06 20:59:47,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2023-11-06 20:59:47,568 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 20:59:47,568 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2023-11-06 20:59:47,569 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-06 20:59:47,569 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2023-11-06 20:59:47,570 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 20:59:47,570 INFO L85 PathProgramCache]: Analyzing trace with hash 84668, now seen corresponding path program 1 times [2023-11-06 20:59:47,570 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-06 20:59:47,570 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [138762077] [2023-11-06 20:59:47,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 20:59:47,571 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 20:59:47,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 20:59:47,647 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 20:59:47,648 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-06 20:59:47,648 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [138762077] [2023-11-06 20:59:47,648 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [138762077] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 20:59:47,649 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 20:59:47,649 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-06 20:59:47,649 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [732292558] [2023-11-06 20:59:47,649 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 20:59:47,650 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 20:59:47,650 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-06 20:59:47,651 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 20:59:47,651 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 20:59:47,652 INFO L87 Difference]: Start difference. First operand 21 states and 21 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 20:59:47,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 20:59:47,685 INFO L93 Difference]: Finished difference Result 17 states and 17 transitions. [2023-11-06 20:59:47,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 20:59:47,685 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 3 [2023-11-06 20:59:47,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 20:59:47,686 INFO L225 Difference]: With dead ends: 17 [2023-11-06 20:59:47,687 INFO L226 Difference]: Without dead ends: 17 [2023-11-06 20:59:47,687 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 20:59:47,689 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 13 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 4 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-06 20:59:47,690 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 4 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-06 20:59:47,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2023-11-06 20:59:47,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2023-11-06 20:59:47,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 12 states have (on average 1.4166666666666667) internal successors, (17), 16 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 20:59:47,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 17 transitions. [2023-11-06 20:59:47,694 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 17 transitions. Word has length 3 [2023-11-06 20:59:47,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 20:59:47,695 INFO L495 AbstractCegarLoop]: Abstraction has 17 states and 17 transitions. [2023-11-06 20:59:47,695 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 20:59:47,695 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 17 transitions. [2023-11-06 20:59:47,696 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2023-11-06 20:59:47,696 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 20:59:47,696 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2023-11-06 20:59:47,696 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-06 20:59:47,697 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2023-11-06 20:59:47,697 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 20:59:47,697 INFO L85 PathProgramCache]: Analyzing trace with hash 84669, now seen corresponding path program 1 times [2023-11-06 20:59:47,698 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-06 20:59:47,698 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1084990977] [2023-11-06 20:59:47,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 20:59:47,699 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 20:59:47,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 20:59:47,830 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 20:59:47,830 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-06 20:59:47,831 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1084990977] [2023-11-06 20:59:47,831 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1084990977] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 20:59:47,831 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 20:59:47,831 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-06 20:59:47,832 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1014970707] [2023-11-06 20:59:47,832 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 20:59:47,833 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 20:59:47,833 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-06 20:59:47,834 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 20:59:47,834 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 20:59:47,834 INFO L87 Difference]: Start difference. First operand 17 states and 17 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 20:59:47,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 20:59:47,870 INFO L93 Difference]: Finished difference Result 13 states and 13 transitions. [2023-11-06 20:59:47,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 20:59:47,871 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 3 [2023-11-06 20:59:47,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 20:59:47,872 INFO L225 Difference]: With dead ends: 13 [2023-11-06 20:59:47,872 INFO L226 Difference]: Without dead ends: 13 [2023-11-06 20:59:47,872 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 20:59:47,874 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 11 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 4 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-06 20:59:47,875 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 4 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-06 20:59:47,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2023-11-06 20:59:47,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2023-11-06 20:59:47,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13 states, 12 states have (on average 1.0833333333333333) internal successors, (13), 12 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 20:59:47,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 13 transitions. [2023-11-06 20:59:47,879 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 13 transitions. Word has length 3 [2023-11-06 20:59:47,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 20:59:47,880 INFO L495 AbstractCegarLoop]: Abstraction has 13 states and 13 transitions. [2023-11-06 20:59:47,880 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 20:59:47,880 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 13 transitions. [2023-11-06 20:59:47,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2023-11-06 20:59:47,881 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 20:59:47,881 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 20:59:47,881 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-06 20:59:47,882 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2023-11-06 20:59:47,882 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 20:59:47,883 INFO L85 PathProgramCache]: Analyzing trace with hash 1599032695, now seen corresponding path program 1 times [2023-11-06 20:59:47,883 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-06 20:59:47,883 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [740245896] [2023-11-06 20:59:47,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 20:59:47,884 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 20:59:47,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 20:59:48,152 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 20:59:48,153 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-06 20:59:48,153 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [740245896] [2023-11-06 20:59:48,153 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [740245896] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 20:59:48,153 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 20:59:48,153 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-06 20:59:48,154 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [689582470] [2023-11-06 20:59:48,154 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 20:59:48,154 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-06 20:59:48,154 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-06 20:59:48,155 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-06 20:59:48,155 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-06 20:59:48,156 INFO L87 Difference]: Start difference. First operand 13 states and 13 transitions. Second operand has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 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 20:59:48,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 20:59:48,201 INFO L93 Difference]: Finished difference Result 18 states and 18 transitions. [2023-11-06 20:59:48,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-06 20:59:48,202 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 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 20:59:48,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 20:59:48,202 INFO L225 Difference]: With dead ends: 18 [2023-11-06 20:59:48,203 INFO L226 Difference]: Without dead ends: 18 [2023-11-06 20:59:48,203 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-11-06 20:59:48,204 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 14 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 9 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-06 20:59:48,205 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 9 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-06 20:59:48,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2023-11-06 20:59:48,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 16. [2023-11-06 20:59:48,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 15 states have (on average 1.0666666666666667) internal successors, (16), 15 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 20:59:48,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 16 transitions. [2023-11-06 20:59:48,209 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 16 transitions. Word has length 8 [2023-11-06 20:59:48,209 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 20:59:48,209 INFO L495 AbstractCegarLoop]: Abstraction has 16 states and 16 transitions. [2023-11-06 20:59:48,209 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 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 20:59:48,209 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 16 transitions. [2023-11-06 20:59:48,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2023-11-06 20:59:48,210 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 20:59:48,210 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 20:59:48,211 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-06 20:59:48,211 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2023-11-06 20:59:48,211 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 20:59:48,211 INFO L85 PathProgramCache]: Analyzing trace with hash 235925563, now seen corresponding path program 1 times [2023-11-06 20:59:48,212 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-06 20:59:48,212 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1759812066] [2023-11-06 20:59:48,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 20:59:48,212 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 20:59:48,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 20:59:48,578 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 20:59:48,579 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-06 20:59:48,579 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1759812066] [2023-11-06 20:59:48,579 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1759812066] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 20:59:48,579 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [467699706] [2023-11-06 20:59:48,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 20:59:48,580 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 20:59:48,580 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0842670f-2254-4118-a663-0cdb06513070/bin/utaipan-verify-FOvIYxoinp/z3 [2023-11-06 20:59:48,585 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0842670f-2254-4118-a663-0cdb06513070/bin/utaipan-verify-FOvIYxoinp/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 20:59:48,599 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0842670f-2254-4118-a663-0cdb06513070/bin/utaipan-verify-FOvIYxoinp/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-06 20:59:48,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 20:59:48,680 INFO L262 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 17 conjunts are in the unsatisfiable core [2023-11-06 20:59:48,686 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 20:59:48,744 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 18 treesize of output 16 [2023-11-06 20:59:48,762 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 20:59:48,778 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 16 treesize of output 11 [2023-11-06 20:59:48,840 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 23 treesize of output 3 [2023-11-06 20:59:48,859 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 16 treesize of output 11 [2023-11-06 20:59:48,877 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2023-11-06 20:59:48,880 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 20:59:48,881 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 20:59:48,914 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_64 (Array Int Int))) (< (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~c~0#1.base| v_ArrVal_64) |c_ULTIMATE.start_main_~i~0#1.base|) |c_ULTIMATE.start_main_~i~0#1.offset|) 11)) is different from false [2023-11-06 20:59:48,940 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_64 (Array Int Int)) (v_ArrVal_63 Int)) (or (< (+ |c_ULTIMATE.start_main_#t~post6#1| 1) v_ArrVal_63) (< (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~i~0#1.base| (store (select |c_#memory_int| |c_ULTIMATE.start_main_~i~0#1.base|) |c_ULTIMATE.start_main_~i~0#1.offset| v_ArrVal_63)) |c_ULTIMATE.start_main_~c~0#1.base| v_ArrVal_64) |c_ULTIMATE.start_main_~i~0#1.base|) |c_ULTIMATE.start_main_~i~0#1.offset|) 11))) is different from false [2023-11-06 20:59:48,960 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_64 (Array Int Int)) (v_ArrVal_63 Int)) (let ((.cse0 (select |c_#memory_int| |c_ULTIMATE.start_main_~i~0#1.base|))) (or (< (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~i~0#1.base| (store .cse0 |c_ULTIMATE.start_main_~i~0#1.offset| v_ArrVal_63)) |c_ULTIMATE.start_main_~c~0#1.base| v_ArrVal_64) |c_ULTIMATE.start_main_~i~0#1.base|) |c_ULTIMATE.start_main_~i~0#1.offset|) 11) (< (+ (select .cse0 |c_ULTIMATE.start_main_~i~0#1.offset|) 1) v_ArrVal_63)))) is different from false [2023-11-06 20:59:49,013 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_61 (Array Int Int)) (v_ArrVal_64 (Array Int Int)) (v_ArrVal_63 Int)) (let ((.cse0 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~c~0#1.base| v_ArrVal_61) |c_ULTIMATE.start_main_~i~0#1.base|))) (or (< (+ (select .cse0 |c_ULTIMATE.start_main_~i~0#1.offset|) 1) v_ArrVal_63) (< (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~i~0#1.base| (store .cse0 |c_ULTIMATE.start_main_~i~0#1.offset| v_ArrVal_63)) |c_ULTIMATE.start_main_~c~0#1.base| v_ArrVal_64) |c_ULTIMATE.start_main_~i~0#1.base|) |c_ULTIMATE.start_main_~i~0#1.offset|) 11)))) is different from false [2023-11-06 20:59:49,032 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 20:59:49,033 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 38 [2023-11-06 20:59:49,041 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 34 treesize of output 26 [2023-11-06 20:59:49,049 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 11 treesize of output 9 [2023-11-06 20:59:49,061 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 3 not checked. [2023-11-06 20:59:49,062 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [467699706] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 20:59:49,062 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1860777457] [2023-11-06 20:59:49,092 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2023-11-06 20:59:49,092 INFO L166 IcfgInterpreter]: Building call graph [2023-11-06 20:59:49,097 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-06 20:59:49,102 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-06 20:59:49,104 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-06 20:59:49,873 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-06 21:00:03,302 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '340#(and (<= 2 |ULTIMATE.start_main_~i~0#1.base|) (<= 1 |#StackHeapBarrier|) (exists ((|v_ULTIMATE.start_main_#t~malloc3#1.base_14| Int) (|v_ULTIMATE.start_main_#t~malloc2#1.base_14| Int) (|v_#valid_47| (Array Int Int))) (and (= (store (store |v_#valid_47| |v_ULTIMATE.start_main_#t~malloc2#1.base_14| 0) |v_ULTIMATE.start_main_#t~malloc3#1.base_14| 0) |#valid|) (= (select |v_#valid_47| |ULTIMATE.start_main_~c~0#1.base|) 1) (<= 2 |v_ULTIMATE.start_main_#t~malloc2#1.base_14|) (<= 2 |v_ULTIMATE.start_main_#t~malloc3#1.base_14|))) (not (= |ULTIMATE.start_main_old_#valid#1| |#valid|)) (<= 4 (select |#length| |ULTIMATE.start_main_~c~0#1.base|)) (= (select (select |#memory_int| |ULTIMATE.start_main_~c~0#1.base|) 0) |ULTIMATE.start_main_#res#1|) (<= 2 |ULTIMATE.start_main_~c~0#1.base|) (= |ULTIMATE.start_main_~c~0#1.offset| 0) (= |ULTIMATE.start_main_~i~0#1.offset| 0))' at error location [2023-11-06 21:00:03,302 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-06 21:00:03,302 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 21:00:03,302 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 8] total 16 [2023-11-06 21:00:03,303 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [22028968] [2023-11-06 21:00:03,303 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 21:00:03,303 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-11-06 21:00:03,303 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-06 21:00:03,304 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-11-06 21:00:03,306 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=410, Unknown=13, NotChecked=180, Total=702 [2023-11-06 21:00:03,306 INFO L87 Difference]: Start difference. First operand 16 states and 16 transitions. Second operand has 17 states, 17 states have (on average 2.0) internal successors, (34), 16 states have internal predecessors, (34), 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 21:00:03,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 21:00:03,523 INFO L93 Difference]: Finished difference Result 25 states and 25 transitions. [2023-11-06 21:00:03,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-06 21:00:03,524 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.0) internal successors, (34), 16 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2023-11-06 21:00:03,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 21:00:03,524 INFO L225 Difference]: With dead ends: 25 [2023-11-06 21:00:03,524 INFO L226 Difference]: Without dead ends: 25 [2023-11-06 21:00:03,525 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 28 SyntacticMatches, 5 SemanticMatches, 26 ConstructedPredicates, 4 IntricatePredicates, 0 DeprecatedPredicates, 206 ImplicationChecksByTransitivity, 13.6s TimeCoverageRelationStatistics Valid=108, Invalid=447, Unknown=13, NotChecked=188, Total=756 [2023-11-06 21:00:03,526 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 14 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 79 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 171 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 79 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 92 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-06 21:00:03,526 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 23 Invalid, 171 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 79 Invalid, 0 Unknown, 92 Unchecked, 0.1s Time] [2023-11-06 21:00:03,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2023-11-06 21:00:03,529 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 23. [2023-11-06 21:00:03,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 22 states have (on average 1.0454545454545454) internal successors, (23), 22 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 21:00:03,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 23 transitions. [2023-11-06 21:00:03,530 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 23 transitions. Word has length 15 [2023-11-06 21:00:03,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 21:00:03,530 INFO L495 AbstractCegarLoop]: Abstraction has 23 states and 23 transitions. [2023-11-06 21:00:03,530 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.0) internal successors, (34), 16 states have internal predecessors, (34), 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 21:00:03,531 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 23 transitions. [2023-11-06 21:00:03,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2023-11-06 21:00:03,531 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 21:00:03,531 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2023-11-06 21:00:03,549 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0842670f-2254-4118-a663-0cdb06513070/bin/utaipan-verify-FOvIYxoinp/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-06 21:00:03,737 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0842670f-2254-4118-a663-0cdb06513070/bin/utaipan-verify-FOvIYxoinp/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:00:03,737 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2023-11-06 21:00:03,738 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:00:03,738 INFO L85 PathProgramCache]: Analyzing trace with hash 1310419191, now seen corresponding path program 2 times [2023-11-06 21:00:03,738 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-06 21:00:03,738 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [380347962] [2023-11-06 21:00:03,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:00:03,738 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:00:03,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:00:04,491 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:00:04,492 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-06 21:00:04,492 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [380347962] [2023-11-06 21:00:04,492 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [380347962] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 21:00:04,492 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1217598926] [2023-11-06 21:00:04,492 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-06 21:00:04,492 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:00:04,493 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0842670f-2254-4118-a663-0cdb06513070/bin/utaipan-verify-FOvIYxoinp/z3 [2023-11-06 21:00:04,505 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0842670f-2254-4118-a663-0cdb06513070/bin/utaipan-verify-FOvIYxoinp/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 21:00:04,513 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0842670f-2254-4118-a663-0cdb06513070/bin/utaipan-verify-FOvIYxoinp/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-06 21:00:04,580 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2023-11-06 21:00:04,580 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 21:00:04,582 INFO L262 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 18 conjunts are in the unsatisfiable core [2023-11-06 21:00:04,586 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 21:00:04,945 WARN L861 $PredicateComparison]: unable to prove that (exists ((|v_ULTIMATE.start_main_#t~malloc3#1.base_15| Int) (|v_ULTIMATE.start_main_#t~malloc2#1.base_15| Int)) (and (= (select (store |c_ULTIMATE.start_main_old_#valid#1| |v_ULTIMATE.start_main_#t~malloc2#1.base_15| 1) |v_ULTIMATE.start_main_#t~malloc3#1.base_15|) 0) (= |c_#valid| (store (store |c_ULTIMATE.start_main_old_#valid#1| |v_ULTIMATE.start_main_#t~malloc2#1.base_15| 0) |v_ULTIMATE.start_main_#t~malloc3#1.base_15| 0)) (= (select |c_ULTIMATE.start_main_old_#valid#1| |v_ULTIMATE.start_main_#t~malloc2#1.base_15|) 0))) is different from true [2023-11-06 21:00:04,946 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-11-06 21:00:04,946 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 21:00:04,946 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1217598926] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 21:00:04,947 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-06 21:00:04,947 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [11] total 13 [2023-11-06 21:00:04,947 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1119093736] [2023-11-06 21:00:04,947 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 21:00:04,948 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-06 21:00:04,948 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-06 21:00:04,948 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-06 21:00:04,949 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=110, Unknown=1, NotChecked=22, Total=182 [2023-11-06 21:00:04,950 INFO L87 Difference]: Start difference. First operand 23 states and 23 transitions. Second operand has 4 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:00:04,979 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 21:00:04,979 INFO L93 Difference]: Finished difference Result 22 states and 22 transitions. [2023-11-06 21:00:04,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-06 21:00:04,982 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2023-11-06 21:00:04,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 21:00:04,983 INFO L225 Difference]: With dead ends: 22 [2023-11-06 21:00:04,983 INFO L226 Difference]: Without dead ends: 0 [2023-11-06 21:00:04,983 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=49, Invalid=110, Unknown=1, NotChecked=22, Total=182 [2023-11-06 21:00:04,984 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 3 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 11 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-06 21:00:04,985 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 3 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 10 Invalid, 0 Unknown, 11 Unchecked, 0.0s Time] [2023-11-06 21:00:04,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2023-11-06 21:00:04,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2023-11-06 21:00:04,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:00:04,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2023-11-06 21:00:04,986 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 22 [2023-11-06 21:00:04,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 21:00:04,986 INFO L495 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2023-11-06 21:00:04,986 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:00:04,986 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2023-11-06 21:00:04,986 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2023-11-06 21:00:04,989 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (16 of 17 remaining) [2023-11-06 21:00:04,990 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (15 of 17 remaining) [2023-11-06 21:00:04,991 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (14 of 17 remaining) [2023-11-06 21:00:04,991 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (13 of 17 remaining) [2023-11-06 21:00:04,991 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (12 of 17 remaining) [2023-11-06 21:00:04,992 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (11 of 17 remaining) [2023-11-06 21:00:04,992 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (10 of 17 remaining) [2023-11-06 21:00:04,993 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (9 of 17 remaining) [2023-11-06 21:00:04,993 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (8 of 17 remaining) [2023-11-06 21:00:04,994 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 17 remaining) [2023-11-06 21:00:04,994 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 17 remaining) [2023-11-06 21:00:04,994 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 17 remaining) [2023-11-06 21:00:04,994 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr12REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 17 remaining) [2023-11-06 21:00:04,995 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 17 remaining) [2023-11-06 21:00:04,995 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr14REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 17 remaining) [2023-11-06 21:00:04,996 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE (1 of 17 remaining) [2023-11-06 21:00:04,997 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK (0 of 17 remaining) [2023-11-06 21:00:05,002 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0842670f-2254-4118-a663-0cdb06513070/bin/utaipan-verify-FOvIYxoinp/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-06 21:00:05,201 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0842670f-2254-4118-a663-0cdb06513070/bin/utaipan-verify-FOvIYxoinp/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:00:05,204 INFO L445 BasicCegarLoop]: Path program histogram: [2, 1, 1, 1, 1, 1] [2023-11-06 21:00:05,206 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-11-06 21:00:05,210 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.11 09:00:05 BoogieIcfgContainer [2023-11-06 21:00:05,210 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-11-06 21:00:05,211 INFO L112 PluginConnector]: ------------------------Witness Printer---------------------------- [2023-11-06 21:00:05,211 INFO L270 PluginConnector]: Initializing Witness Printer... [2023-11-06 21:00:05,211 INFO L274 PluginConnector]: Witness Printer initialized [2023-11-06 21:00:05,212 INFO L184 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 08:59:46" (3/4) ... [2023-11-06 21:00:05,213 INFO L137 WitnessPrinter]: Generating witness for correct program [2023-11-06 21:00:05,220 INFO L939 BoogieBacktranslator]: Reduced CFG by removing 16 nodes and edges [2023-11-06 21:00:05,221 INFO L939 BoogieBacktranslator]: Reduced CFG by removing 5 nodes and edges [2023-11-06 21:00:05,221 INFO L939 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2023-11-06 21:00:05,221 INFO L939 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2023-11-06 21:00:05,274 INFO L149 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0842670f-2254-4118-a663-0cdb06513070/bin/utaipan-verify-FOvIYxoinp/witness.graphml.graphml [2023-11-06 21:00:05,274 INFO L149 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0842670f-2254-4118-a663-0cdb06513070/bin/utaipan-verify-FOvIYxoinp/witness.graphml.yaml [2023-11-06 21:00:05,274 INFO L131 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2023-11-06 21:00:05,275 INFO L158 Benchmark]: Toolchain (without parser) took 19806.52ms. Allocated memory was 136.3MB in the beginning and 247.5MB in the end (delta: 111.1MB). Free memory was 89.8MB in the beginning and 108.2MB in the end (delta: -18.3MB). Peak memory consumption was 95.0MB. Max. memory is 16.1GB. [2023-11-06 21:00:05,275 INFO L158 Benchmark]: CDTParser took 0.36ms. Allocated memory is still 136.3MB. Free memory is still 81.3MB. There was no memory consumed. Max. memory is 16.1GB. [2023-11-06 21:00:05,276 INFO L158 Benchmark]: CACSL2BoogieTranslator took 453.45ms. Allocated memory is still 136.3MB. Free memory was 89.5MB in the beginning and 74.2MB in the end (delta: 15.3MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. [2023-11-06 21:00:05,277 INFO L158 Benchmark]: Boogie Procedure Inliner took 57.49ms. Allocated memory is still 136.3MB. Free memory was 74.2MB in the beginning and 72.4MB in the end (delta: 1.8MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2023-11-06 21:00:05,280 INFO L158 Benchmark]: Boogie Preprocessor took 42.00ms. Allocated memory is still 136.3MB. Free memory was 72.4MB in the beginning and 71.4MB in the end (delta: 1.0MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2023-11-06 21:00:05,284 INFO L158 Benchmark]: RCFGBuilder took 543.69ms. Allocated memory was 136.3MB in the beginning and 205.5MB in the end (delta: 69.2MB). Free memory was 71.4MB in the beginning and 169.8MB in the end (delta: -98.5MB). Peak memory consumption was 15.7MB. Max. memory is 16.1GB. [2023-11-06 21:00:05,285 INFO L158 Benchmark]: TraceAbstraction took 18638.12ms. Allocated memory was 205.5MB in the beginning and 247.5MB in the end (delta: 41.9MB). Free memory was 168.7MB in the beginning and 111.3MB in the end (delta: 57.3MB). Peak memory consumption was 98.1MB. Max. memory is 16.1GB. [2023-11-06 21:00:05,285 INFO L158 Benchmark]: Witness Printer took 63.82ms. Allocated memory is still 247.5MB. Free memory was 111.3MB in the beginning and 108.2MB in the end (delta: 3.1MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2023-11-06 21:00:05,289 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.36ms. Allocated memory is still 136.3MB. Free memory is still 81.3MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 453.45ms. Allocated memory is still 136.3MB. Free memory was 89.5MB in the beginning and 74.2MB in the end (delta: 15.3MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 57.49ms. Allocated memory is still 136.3MB. Free memory was 74.2MB in the beginning and 72.4MB in the end (delta: 1.8MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 42.00ms. Allocated memory is still 136.3MB. Free memory was 72.4MB in the beginning and 71.4MB in the end (delta: 1.0MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 543.69ms. Allocated memory was 136.3MB in the beginning and 205.5MB in the end (delta: 69.2MB). Free memory was 71.4MB in the beginning and 169.8MB in the end (delta: -98.5MB). Peak memory consumption was 15.7MB. Max. memory is 16.1GB. * TraceAbstraction took 18638.12ms. Allocated memory was 205.5MB in the beginning and 247.5MB in the end (delta: 41.9MB). Free memory was 168.7MB in the beginning and 111.3MB in the end (delta: 57.3MB). Peak memory consumption was 98.1MB. Max. memory is 16.1GB. * Witness Printer took 63.82ms. Allocated memory is still 247.5MB. Free memory was 111.3MB in the beginning and 108.2MB in the end (delta: 3.1MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 546]: all allocated memory was freed For all program executions holds that all allocated memory was freed at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 30 locations, 17 error locations. Started 1 CEGAR loops. OverallTime: 18.6s, OverallIterations: 7, TraceHistogramMax: 3, PathProgramHistogramMax: 2, EmptinessCheckTime: 0.0s, AutomataDifference: 0.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 94 SdHoareTripleChecker+Valid, 0.3s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 94 mSDsluCounter, 59 SdHoareTripleChecker+Invalid, 0.3s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 103 IncrementalHoareTripleChecker+Unchecked, 26 mSDsCounter, 13 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 175 IncrementalHoareTripleChecker+Invalid, 291 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 13 mSolverCounterUnsat, 33 mSDtfsCounter, 175 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 104 GetRequests, 53 SyntacticMatches, 5 SemanticMatches, 46 ConstructedPredicates, 5 IntricatePredicates, 0 DeprecatedPredicates, 252 ImplicationChecksByTransitivity, 13.8s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=30occurred in iteration=0, InterpolantAutomatonStates: 29, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 7 MinimizatonAttempts, 4 StatesRemovedByMinimization, 2 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 2.6s InterpolantComputationTime, 92 NumberOfCodeBlocks, 78 NumberOfCodeBlocksAsserted, 9 NumberOfCheckSat, 97 ConstructedInterpolants, 9 QuantifiedInterpolants, 1293 SizeOfPredicates, 11 NumberOfNonLiveVariables, 184 ConjunctsInSsa, 35 ConjunctsInUnsatCore, 10 InterpolantComputations, 6 PerfectInterpolantSequences, 13/35 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 17 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2023-11-06 21:00:05,342 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0842670f-2254-4118-a663-0cdb06513070/bin/utaipan-verify-FOvIYxoinp/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: TRUE