./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/termination-dietlibc/strlen.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_2f21e107-f4ea-4cba-91df-e9350350ed5a/bin/utaipan-verify-FOvIYxoinp/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f21e107-f4ea-4cba-91df-e9350350ed5a/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_2f21e107-f4ea-4cba-91df-e9350350ed5a/bin/utaipan-verify-FOvIYxoinp/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f21e107-f4ea-4cba-91df-e9350350ed5a/bin/utaipan-verify-FOvIYxoinp/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/termination-dietlibc/strlen.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f21e107-f4ea-4cba-91df-e9350350ed5a/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_2f21e107-f4ea-4cba-91df-e9350350ed5a/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 34b0c24ca65344579aaae251146dead1808e12ac6f6737a3aee037d4f6e47452 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-e7bb482 [2023-11-06 21:06:17,958 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-06 21:06:18,058 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f21e107-f4ea-4cba-91df-e9350350ed5a/bin/utaipan-verify-FOvIYxoinp/config/svcomp-DerefFreeMemtrack-64bit-Taipan_Default.epf [2023-11-06 21:06:18,069 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-06 21:06:18,070 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-06 21:06:18,104 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-06 21:06:18,105 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-06 21:06:18,105 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-06 21:06:18,106 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-06 21:06:18,106 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-06 21:06:18,107 INFO L153 SettingsManager]: * User list type=DISABLED [2023-11-06 21:06:18,108 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-11-06 21:06:18,108 INFO L153 SettingsManager]: * Explicit value domain=true [2023-11-06 21:06:18,109 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-11-06 21:06:18,109 INFO L153 SettingsManager]: * Octagon Domain=false [2023-11-06 21:06:18,110 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-11-06 21:06:18,110 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-11-06 21:06:18,111 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-11-06 21:06:18,111 INFO L153 SettingsManager]: * Interval Domain=false [2023-11-06 21:06:18,115 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-11-06 21:06:18,119 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-11-06 21:06:18,119 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-11-06 21:06:18,120 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-06 21:06:18,122 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-06 21:06:18,123 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-06 21:06:18,123 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-06 21:06:18,124 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-06 21:06:18,124 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-11-06 21:06:18,124 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2023-11-06 21:06:18,125 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-11-06 21:06:18,126 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-06 21:06:18,126 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-11-06 21:06:18,126 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-06 21:06:18,127 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-06 21:06:18,127 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-06 21:06:18,127 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-06 21:06:18,127 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-06 21:06:18,128 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-06 21:06:18,128 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-06 21:06:18,128 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-11-06 21:06:18,128 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-06 21:06:18,128 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-11-06 21:06:18,129 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-06 21:06:18,129 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_2f21e107-f4ea-4cba-91df-e9350350ed5a/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f21e107-f4ea-4cba-91df-e9350350ed5a/bin/utaipan-verify-FOvIYxoinp Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 34b0c24ca65344579aaae251146dead1808e12ac6f6737a3aee037d4f6e47452 [2023-11-06 21:06:18,445 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-06 21:06:18,477 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-06 21:06:18,480 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-06 21:06:18,481 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-06 21:06:18,482 INFO L274 PluginConnector]: CDTParser initialized [2023-11-06 21:06:18,483 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f21e107-f4ea-4cba-91df-e9350350ed5a/bin/utaipan-verify-FOvIYxoinp/../../sv-benchmarks/c/termination-dietlibc/strlen.i [2023-11-06 21:06:21,652 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-06 21:06:21,908 INFO L384 CDTParser]: Found 1 translation units. [2023-11-06 21:06:21,909 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f21e107-f4ea-4cba-91df-e9350350ed5a/sv-benchmarks/c/termination-dietlibc/strlen.i [2023-11-06 21:06:21,924 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f21e107-f4ea-4cba-91df-e9350350ed5a/bin/utaipan-verify-FOvIYxoinp/data/97d861c27/b9c7107ddb8148ea8a45861224f38d81/FLAGda8eabb7c [2023-11-06 21:06:21,938 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f21e107-f4ea-4cba-91df-e9350350ed5a/bin/utaipan-verify-FOvIYxoinp/data/97d861c27/b9c7107ddb8148ea8a45861224f38d81 [2023-11-06 21:06:21,941 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-06 21:06:21,942 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-06 21:06:21,943 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-06 21:06:21,944 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-06 21:06:21,956 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-06 21:06:21,957 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 09:06:21" (1/1) ... [2023-11-06 21:06:21,958 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@38298ea9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:06:21, skipping insertion in model container [2023-11-06 21:06:21,959 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 09:06:21" (1/1) ... [2023-11-06 21:06:22,005 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-06 21:06:22,307 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-06 21:06:22,320 INFO L202 MainTranslator]: Completed pre-run [2023-11-06 21:06:22,358 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-06 21:06:22,391 INFO L206 MainTranslator]: Completed translation [2023-11-06 21:06:22,391 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:06:22 WrapperNode [2023-11-06 21:06:22,392 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-06 21:06:22,393 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-06 21:06:22,393 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-06 21:06:22,393 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-06 21:06:22,402 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:06:22" (1/1) ... [2023-11-06 21:06:22,418 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:06:22" (1/1) ... [2023-11-06 21:06:22,446 INFO L138 Inliner]: procedures = 113, calls = 8, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 43 [2023-11-06 21:06:22,446 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-06 21:06:22,447 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-06 21:06:22,447 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-06 21:06:22,448 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-06 21:06:22,458 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:06:22" (1/1) ... [2023-11-06 21:06:22,458 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:06:22" (1/1) ... [2023-11-06 21:06:22,476 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:06:22" (1/1) ... [2023-11-06 21:06:22,477 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:06:22" (1/1) ... [2023-11-06 21:06:22,482 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:06:22" (1/1) ... [2023-11-06 21:06:22,493 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:06:22" (1/1) ... [2023-11-06 21:06:22,496 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:06:22" (1/1) ... [2023-11-06 21:06:22,500 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:06:22" (1/1) ... [2023-11-06 21:06:22,505 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-06 21:06:22,510 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-06 21:06:22,510 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-06 21:06:22,510 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-06 21:06:22,511 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:06:22" (1/1) ... [2023-11-06 21:06:22,519 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-06 21:06:22,533 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f21e107-f4ea-4cba-91df-e9350350ed5a/bin/utaipan-verify-FOvIYxoinp/z3 [2023-11-06 21:06:22,545 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f21e107-f4ea-4cba-91df-e9350350ed5a/bin/utaipan-verify-FOvIYxoinp/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-06 21:06:22,551 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f21e107-f4ea-4cba-91df-e9350350ed5a/bin/utaipan-verify-FOvIYxoinp/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-06 21:06:22,582 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-06 21:06:22,583 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-06 21:06:22,583 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-06 21:06:22,583 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-06 21:06:22,583 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-06 21:06:22,583 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-06 21:06:22,672 INFO L236 CfgBuilder]: Building ICFG [2023-11-06 21:06:22,673 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-06 21:06:22,851 INFO L277 CfgBuilder]: Performing block encoding [2023-11-06 21:06:22,883 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-06 21:06:22,883 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-11-06 21:06:22,886 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 09:06:22 BoogieIcfgContainer [2023-11-06 21:06:22,886 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-06 21:06:22,888 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-06 21:06:22,889 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-06 21:06:22,891 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-06 21:06:22,891 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 09:06:21" (1/3) ... [2023-11-06 21:06:22,892 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3956b82c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 09:06:22, skipping insertion in model container [2023-11-06 21:06:22,892 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:06:22" (2/3) ... [2023-11-06 21:06:22,893 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3956b82c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 09:06:22, skipping insertion in model container [2023-11-06 21:06:22,893 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 09:06:22" (3/3) ... [2023-11-06 21:06:22,894 INFO L112 eAbstractionObserver]: Analyzing ICFG strlen.i [2023-11-06 21:06:22,915 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-06 21:06:22,915 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 5 error locations. [2023-11-06 21:06:22,975 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-06 21:06:22,982 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;@91db79d, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-06 21:06:22,982 INFO L358 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2023-11-06 21:06:23,000 INFO L276 IsEmpty]: Start isEmpty. Operand has 15 states, 9 states have (on average 2.0) internal successors, (18), 14 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:06:23,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2023-11-06 21:06:23,007 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 21:06:23,008 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2023-11-06 21:06:23,008 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 2 more)] === [2023-11-06 21:06:23,014 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:06:23,014 INFO L85 PathProgramCache]: Analyzing trace with hash 70345, now seen corresponding path program 1 times [2023-11-06 21:06:23,024 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-06 21:06:23,025 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [392304951] [2023-11-06 21:06:23,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:06:23,026 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:06:23,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:06:23,179 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:06:23,179 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-06 21:06:23,180 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [392304951] [2023-11-06 21:06:23,180 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [392304951] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 21:06:23,181 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 21:06:23,181 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-06 21:06:23,183 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [489917830] [2023-11-06 21:06:23,183 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 21:06:23,188 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 21:06:23,188 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-06 21:06:23,231 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 21:06:23,232 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 21:06:23,234 INFO L87 Difference]: Start difference. First operand has 15 states, 9 states have (on average 2.0) internal successors, (18), 14 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:06:23,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 21:06:23,312 INFO L93 Difference]: Finished difference Result 16 states and 18 transitions. [2023-11-06 21:06:23,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 21:06:23,317 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 3 [2023-11-06 21:06:23,318 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 21:06:23,326 INFO L225 Difference]: With dead ends: 16 [2023-11-06 21:06:23,327 INFO L226 Difference]: Without dead ends: 14 [2023-11-06 21:06:23,330 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 21:06:23,337 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 1 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-06 21:06:23,339 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 18 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-06 21:06:23,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2023-11-06 21:06:23,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2023-11-06 21:06:23,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 13 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:06:23,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 15 transitions. [2023-11-06 21:06:23,375 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 15 transitions. Word has length 3 [2023-11-06 21:06:23,376 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 21:06:23,376 INFO L495 AbstractCegarLoop]: Abstraction has 14 states and 15 transitions. [2023-11-06 21:06:23,376 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:06:23,379 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 15 transitions. [2023-11-06 21:06:23,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2023-11-06 21:06:23,379 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 21:06:23,380 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2023-11-06 21:06:23,380 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-06 21:06:23,381 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 2 more)] === [2023-11-06 21:06:23,382 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:06:23,382 INFO L85 PathProgramCache]: Analyzing trace with hash 70379, now seen corresponding path program 1 times [2023-11-06 21:06:23,383 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-06 21:06:23,383 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1909670383] [2023-11-06 21:06:23,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:06:23,383 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:06:23,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:06:23,547 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:06:23,549 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-06 21:06:23,550 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1909670383] [2023-11-06 21:06:23,550 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1909670383] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 21:06:23,550 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 21:06:23,550 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-06 21:06:23,551 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [499457940] [2023-11-06 21:06:23,551 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 21:06:23,553 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 21:06:23,554 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-06 21:06:23,554 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 21:06:23,555 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 21:06:23,556 INFO L87 Difference]: Start difference. First operand 14 states and 15 transitions. Second operand has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:06:23,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 21:06:23,593 INFO L93 Difference]: Finished difference Result 13 states and 14 transitions. [2023-11-06 21:06:23,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 21:06:23,594 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 3 [2023-11-06 21:06:23,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 21:06:23,595 INFO L225 Difference]: With dead ends: 13 [2023-11-06 21:06:23,595 INFO L226 Difference]: Without dead ends: 13 [2023-11-06 21:06:23,595 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 21:06:23,598 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 10 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 7 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-06 21:06:23,600 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 7 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-06 21:06:23,602 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2023-11-06 21:06:23,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2023-11-06 21:06:23,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13 states, 9 states have (on average 1.5555555555555556) internal successors, (14), 12 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:06:23,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 14 transitions. [2023-11-06 21:06:23,608 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 14 transitions. Word has length 3 [2023-11-06 21:06:23,608 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 21:06:23,609 INFO L495 AbstractCegarLoop]: Abstraction has 13 states and 14 transitions. [2023-11-06 21:06:23,609 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:06:23,609 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 14 transitions. [2023-11-06 21:06:23,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2023-11-06 21:06:23,610 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 21:06:23,610 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2023-11-06 21:06:23,610 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-06 21:06:23,610 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 2 more)] === [2023-11-06 21:06:23,611 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:06:23,613 INFO L85 PathProgramCache]: Analyzing trace with hash 70380, now seen corresponding path program 1 times [2023-11-06 21:06:23,613 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-06 21:06:23,614 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [551114605] [2023-11-06 21:06:23,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:06:23,614 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:06:23,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:06:23,871 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:06:23,871 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-06 21:06:23,871 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [551114605] [2023-11-06 21:06:23,872 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [551114605] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 21:06:23,872 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 21:06:23,872 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-06 21:06:23,872 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1139774310] [2023-11-06 21:06:23,873 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 21:06:23,873 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-06 21:06:23,873 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-06 21:06:23,874 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-06 21:06:23,874 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-06 21:06:23,875 INFO L87 Difference]: Start difference. First operand 13 states and 14 transitions. Second operand has 4 states, 3 states have (on average 1.0) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:06:23,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 21:06:23,894 INFO L93 Difference]: Finished difference Result 12 states and 13 transitions. [2023-11-06 21:06:23,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-06 21:06:23,895 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 1.0) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 3 [2023-11-06 21:06:23,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 21:06:23,895 INFO L225 Difference]: With dead ends: 12 [2023-11-06 21:06:23,895 INFO L226 Difference]: Without dead ends: 12 [2023-11-06 21:06:23,896 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-06 21:06:23,898 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 11 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 7 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-06 21:06:23,898 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 7 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-06 21:06:23,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2023-11-06 21:06:23,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2023-11-06 21:06:23,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12 states, 9 states have (on average 1.4444444444444444) internal successors, (13), 11 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 21:06:23,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 13 transitions. [2023-11-06 21:06:23,902 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 13 transitions. Word has length 3 [2023-11-06 21:06:23,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 21:06:23,903 INFO L495 AbstractCegarLoop]: Abstraction has 12 states and 13 transitions. [2023-11-06 21:06:23,903 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 1.0) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:06:23,903 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 13 transitions. [2023-11-06 21:06:23,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2023-11-06 21:06:23,904 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 21:06:23,904 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2023-11-06 21:06:23,904 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-06 21:06:23,905 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 2 more)] === [2023-11-06 21:06:23,905 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:06:23,905 INFO L85 PathProgramCache]: Analyzing trace with hash 67664527, now seen corresponding path program 1 times [2023-11-06 21:06:23,906 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-06 21:06:23,906 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [947569993] [2023-11-06 21:06:23,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:06:23,906 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:06:23,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:06:23,970 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:06:23,972 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-06 21:06:23,972 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [947569993] [2023-11-06 21:06:23,972 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [947569993] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 21:06:23,973 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 21:06:23,973 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-06 21:06:23,973 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [580518112] [2023-11-06 21:06:23,974 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 21:06:23,974 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 21:06:23,975 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-06 21:06:23,975 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 21:06:23,976 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 21:06:23,976 INFO L87 Difference]: Start difference. First operand 12 states and 13 transitions. Second operand has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 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 21:06:24,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 21:06:24,010 INFO L93 Difference]: Finished difference Result 11 states and 12 transitions. [2023-11-06 21:06:24,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 21:06:24,011 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2023-11-06 21:06:24,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 21:06:24,011 INFO L225 Difference]: With dead ends: 11 [2023-11-06 21:06:24,013 INFO L226 Difference]: Without dead ends: 11 [2023-11-06 21:06:24,013 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 21:06:24,014 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 5 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 4 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-06 21:06:24,019 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 4 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-06 21:06:24,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2023-11-06 21:06:24,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2023-11-06 21:06:24,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11 states, 9 states have (on average 1.3333333333333333) internal successors, (12), 10 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:06:24,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 12 transitions. [2023-11-06 21:06:24,027 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 12 transitions. Word has length 5 [2023-11-06 21:06:24,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 21:06:24,027 INFO L495 AbstractCegarLoop]: Abstraction has 11 states and 12 transitions. [2023-11-06 21:06:24,028 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 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 21:06:24,028 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 12 transitions. [2023-11-06 21:06:24,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2023-11-06 21:06:24,029 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 21:06:24,029 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2023-11-06 21:06:24,029 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-06 21:06:24,030 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 2 more)] === [2023-11-06 21:06:24,031 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:06:24,031 INFO L85 PathProgramCache]: Analyzing trace with hash 67664528, now seen corresponding path program 1 times [2023-11-06 21:06:24,031 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-06 21:06:24,032 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [559372377] [2023-11-06 21:06:24,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:06:24,032 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:06:24,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:06:24,304 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:06:24,304 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-06 21:06:24,305 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [559372377] [2023-11-06 21:06:24,305 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [559372377] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 21:06:24,305 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 21:06:24,305 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-06 21:06:24,306 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [770202886] [2023-11-06 21:06:24,306 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 21:06:24,306 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-06 21:06:24,307 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-06 21:06:24,307 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-06 21:06:24,308 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-06 21:06:24,308 INFO L87 Difference]: Start difference. First operand 11 states and 12 transitions. Second operand has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 4 states have internal predecessors, (5), 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 21:06:24,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 21:06:24,345 INFO L93 Difference]: Finished difference Result 15 states and 17 transitions. [2023-11-06 21:06:24,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-06 21:06:24,346 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 4 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2023-11-06 21:06:24,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 21:06:24,347 INFO L225 Difference]: With dead ends: 15 [2023-11-06 21:06:24,347 INFO L226 Difference]: Without dead ends: 15 [2023-11-06 21:06:24,347 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-06 21:06:24,349 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 19 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 9 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-06 21:06:24,349 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 9 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-06 21:06:24,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2023-11-06 21:06:24,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 12. [2023-11-06 21:06:24,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12 states, 10 states have (on average 1.3) internal successors, (13), 11 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 21:06:24,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 13 transitions. [2023-11-06 21:06:24,353 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 13 transitions. Word has length 5 [2023-11-06 21:06:24,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 21:06:24,354 INFO L495 AbstractCegarLoop]: Abstraction has 12 states and 13 transitions. [2023-11-06 21:06:24,355 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 4 states have internal predecessors, (5), 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 21:06:24,356 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 13 transitions. [2023-11-06 21:06:24,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2023-11-06 21:06:24,356 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 21:06:24,356 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2023-11-06 21:06:24,357 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-06 21:06:24,357 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 2 more)] === [2023-11-06 21:06:24,357 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:06:24,358 INFO L85 PathProgramCache]: Analyzing trace with hash 2097598886, now seen corresponding path program 1 times [2023-11-06 21:06:24,358 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-06 21:06:24,358 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1493956769] [2023-11-06 21:06:24,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:06:24,359 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:06:24,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:06:24,469 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:06:24,469 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-06 21:06:24,470 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1493956769] [2023-11-06 21:06:24,470 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1493956769] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 21:06:24,471 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 21:06:24,471 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-06 21:06:24,471 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [232110317] [2023-11-06 21:06:24,471 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 21:06:24,472 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-06 21:06:24,472 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-06 21:06:24,474 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-06 21:06:24,475 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-06 21:06:24,475 INFO L87 Difference]: Start difference. First operand 12 states and 13 transitions. Second operand has 4 states, 4 states have (on average 1.5) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:06:24,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 21:06:24,533 INFO L93 Difference]: Finished difference Result 12 states and 12 transitions. [2023-11-06 21:06:24,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-06 21:06:24,533 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.5) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2023-11-06 21:06:24,534 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 21:06:24,534 INFO L225 Difference]: With dead ends: 12 [2023-11-06 21:06:24,535 INFO L226 Difference]: Without dead ends: 12 [2023-11-06 21:06:24,538 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-06 21:06:24,541 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 12 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-06 21:06:24,544 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 6 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-06 21:06:24,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2023-11-06 21:06:24,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2023-11-06 21:06:24,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12 states, 10 states have (on average 1.2) internal successors, (12), 11 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:06:24,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 12 transitions. [2023-11-06 21:06:24,552 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 12 transitions. Word has length 6 [2023-11-06 21:06:24,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 21:06:24,558 INFO L495 AbstractCegarLoop]: Abstraction has 12 states and 12 transitions. [2023-11-06 21:06:24,559 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.5) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:06:24,559 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 12 transitions. [2023-11-06 21:06:24,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2023-11-06 21:06:24,560 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 21:06:24,560 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:06:24,560 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-06 21:06:24,560 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 2 more)] === [2023-11-06 21:06:24,561 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:06:24,561 INFO L85 PathProgramCache]: Analyzing trace with hash 601101339, now seen corresponding path program 1 times [2023-11-06 21:06:24,561 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-06 21:06:24,561 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [573591669] [2023-11-06 21:06:24,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:06:24,562 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:06:24,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:06:24,938 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:06:24,938 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-06 21:06:24,938 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [573591669] [2023-11-06 21:06:24,939 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [573591669] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 21:06:24,939 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [435476124] [2023-11-06 21:06:24,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:06:24,940 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:06:24,940 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f21e107-f4ea-4cba-91df-e9350350ed5a/bin/utaipan-verify-FOvIYxoinp/z3 [2023-11-06 21:06:24,947 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f21e107-f4ea-4cba-91df-e9350350ed5a/bin/utaipan-verify-FOvIYxoinp/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 21:06:24,961 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f21e107-f4ea-4cba-91df-e9350350ed5a/bin/utaipan-verify-FOvIYxoinp/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-06 21:06:25,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:06:25,031 INFO L262 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 21 conjunts are in the unsatisfiable core [2023-11-06 21:06:25,038 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 21:06:25,150 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2023-11-06 21:06:25,285 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 21:06:25,288 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 19 [2023-11-06 21:06:25,375 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:06:25,375 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 21:06:25,551 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 13 treesize of output 11 [2023-11-06 21:06:25,559 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 15 treesize of output 11 [2023-11-06 21:06:25,572 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 22 treesize of output 20 [2023-11-06 21:06:25,595 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:06:25,596 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [435476124] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 21:06:25,596 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1601554091] [2023-11-06 21:06:25,614 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2023-11-06 21:06:25,615 INFO L166 IcfgInterpreter]: Building call graph [2023-11-06 21:06:25,618 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-06 21:06:25,623 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-06 21:06:25,623 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-06 21:06:26,307 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-06 21:06:26,733 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '244#(and (<= 0 |ULTIMATE.start_strlen_~i~0#1|) (<= 1 |#StackHeapBarrier|) (= |ULTIMATE.start_main_~hay~0#1.offset| 0) (<= (select |#length| |ULTIMATE.start_strlen_~s#1.base|) |ULTIMATE.start_strlen_~s#1.offset|) (<= 2 |ULTIMATE.start_main_~hay~0#1.base|) (<= 2 |ULTIMATE.start_strlen_~s#1.base|) (<= |ULTIMATE.start_main_~in_len~0#1| 2147483647) (<= 2 |ULTIMATE.start_main_#t~malloc6#1.base|) (= |ULTIMATE.start_main_#t~malloc6#1.offset| 0) (= |ULTIMATE.start_strlen_#in~s#1.offset| 0) (<= 0 |ULTIMATE.start_strlen_~s#1.offset|) (<= 1 |ULTIMATE.start_main_~in_len~0#1|) (<= 2 |ULTIMATE.start_strlen_#in~s#1.base|))' at error location [2023-11-06 21:06:26,733 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-06 21:06:26,734 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 21:06:26,734 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 11 [2023-11-06 21:06:26,734 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [232976947] [2023-11-06 21:06:26,734 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 21:06:26,734 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-06 21:06:26,735 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-06 21:06:26,735 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-06 21:06:26,735 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2023-11-06 21:06:26,736 INFO L87 Difference]: Start difference. First operand 12 states and 12 transitions. Second operand has 12 states, 11 states have (on average 1.5454545454545454) internal successors, (17), 12 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:06:28,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 21:06:28,282 INFO L93 Difference]: Finished difference Result 19 states and 21 transitions. [2023-11-06 21:06:28,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-06 21:06:28,284 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 1.5454545454545454) internal successors, (17), 12 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) Word has length 7 [2023-11-06 21:06:28,284 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 21:06:28,285 INFO L225 Difference]: With dead ends: 19 [2023-11-06 21:06:28,285 INFO L226 Difference]: Without dead ends: 19 [2023-11-06 21:06:28,285 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 7 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=85, Invalid=334, Unknown=1, NotChecked=0, Total=420 [2023-11-06 21:06:28,286 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 52 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 66 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 68 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 66 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-06 21:06:28,286 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [52 Valid, 22 Invalid, 68 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 66 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-06 21:06:28,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2023-11-06 21:06:28,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 14. [2023-11-06 21:06:28,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14 states, 12 states have (on average 1.25) internal successors, (15), 13 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:06:28,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 15 transitions. [2023-11-06 21:06:28,289 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 15 transitions. Word has length 7 [2023-11-06 21:06:28,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 21:06:28,289 INFO L495 AbstractCegarLoop]: Abstraction has 14 states and 15 transitions. [2023-11-06 21:06:28,289 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 1.5454545454545454) internal successors, (17), 12 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:06:28,289 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 15 transitions. [2023-11-06 21:06:28,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2023-11-06 21:06:28,290 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 21:06:28,290 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:06:28,303 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f21e107-f4ea-4cba-91df-e9350350ed5a/bin/utaipan-verify-FOvIYxoinp/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-06 21:06:28,496 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f21e107-f4ea-4cba-91df-e9350350ed5a/bin/utaipan-verify-FOvIYxoinp/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:06:28,497 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 2 more)] === [2023-11-06 21:06:28,497 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:06:28,497 INFO L85 PathProgramCache]: Analyzing trace with hash 2132304152, now seen corresponding path program 1 times [2023-11-06 21:06:28,497 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-06 21:06:28,497 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1803684140] [2023-11-06 21:06:28,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:06:28,498 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:06:28,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:06:28,594 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:06:28,595 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-06 21:06:28,595 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1803684140] [2023-11-06 21:06:28,595 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1803684140] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 21:06:28,595 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 21:06:28,595 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-06 21:06:28,596 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1373443853] [2023-11-06 21:06:28,596 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 21:06:28,597 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-06 21:06:28,597 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-06 21:06:28,597 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-06 21:06:28,598 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-06 21:06:28,598 INFO L87 Difference]: Start difference. First operand 14 states and 15 transitions. Second operand has 4 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:06:28,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 21:06:28,615 INFO L93 Difference]: Finished difference Result 13 states and 14 transitions. [2023-11-06 21:06:28,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-06 21:06:28,616 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2023-11-06 21:06:28,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 21:06:28,617 INFO L225 Difference]: With dead ends: 13 [2023-11-06 21:06:28,618 INFO L226 Difference]: Without dead ends: 10 [2023-11-06 21:06:28,618 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-06 21:06:28,620 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 2 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 8 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-06 21:06:28,620 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 8 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-06 21:06:28,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2023-11-06 21:06:28,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 10. [2023-11-06 21:06:28,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10 states, 9 states have (on average 1.1111111111111112) internal successors, (10), 9 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:06:28,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 10 transitions. [2023-11-06 21:06:28,624 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 10 transitions. Word has length 9 [2023-11-06 21:06:28,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 21:06:28,626 INFO L495 AbstractCegarLoop]: Abstraction has 10 states and 10 transitions. [2023-11-06 21:06:28,628 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:06:28,629 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 10 transitions. [2023-11-06 21:06:28,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2023-11-06 21:06:28,629 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 21:06:28,629 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1] [2023-11-06 21:06:28,630 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-11-06 21:06:28,630 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 2 more)] === [2023-11-06 21:06:28,630 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:06:28,631 INFO L85 PathProgramCache]: Analyzing trace with hash 2132768486, now seen corresponding path program 2 times [2023-11-06 21:06:28,631 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-06 21:06:28,633 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1371284781] [2023-11-06 21:06:28,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:06:28,634 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:06:28,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:06:29,056 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:06:29,057 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-06 21:06:29,057 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1371284781] [2023-11-06 21:06:29,057 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1371284781] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 21:06:29,057 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1589014101] [2023-11-06 21:06:29,058 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-06 21:06:29,058 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:06:29,058 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f21e107-f4ea-4cba-91df-e9350350ed5a/bin/utaipan-verify-FOvIYxoinp/z3 [2023-11-06 21:06:29,061 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f21e107-f4ea-4cba-91df-e9350350ed5a/bin/utaipan-verify-FOvIYxoinp/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 21:06:29,080 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f21e107-f4ea-4cba-91df-e9350350ed5a/bin/utaipan-verify-FOvIYxoinp/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-06 21:06:29,139 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-11-06 21:06:29,140 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 21:06:29,141 INFO L262 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 28 conjunts are in the unsatisfiable core [2023-11-06 21:06:29,145 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 21:06:29,173 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2023-11-06 21:06:30,156 INFO L322 Elim1Store]: treesize reduction 4, result has 82.6 percent of original size [2023-11-06 21:06:30,157 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 29 [2023-11-06 21:06:30,229 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 1 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:06:30,229 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 21:06:30,476 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 29 treesize of output 25 [2023-11-06 21:06:30,486 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 39 [2023-11-06 21:06:30,496 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2023-11-06 21:06:30,509 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:06:30,510 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1589014101] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 21:06:30,510 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [21717543] [2023-11-06 21:06:30,512 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2023-11-06 21:06:30,513 INFO L166 IcfgInterpreter]: Building call graph [2023-11-06 21:06:30,513 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-06 21:06:30,513 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-06 21:06:30,513 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-06 21:06:30,947 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-06 21:06:31,422 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '382#(and (<= 0 |ULTIMATE.start_strlen_~i~0#1|) (<= 1 |#StackHeapBarrier|) (= |ULTIMATE.start_main_~hay~0#1.offset| 0) (<= (select |#length| |ULTIMATE.start_strlen_~s#1.base|) |ULTIMATE.start_strlen_~s#1.offset|) (<= 2 |ULTIMATE.start_main_~hay~0#1.base|) (<= 2 |ULTIMATE.start_strlen_~s#1.base|) (<= |ULTIMATE.start_main_~in_len~0#1| 2147483647) (<= 2 |ULTIMATE.start_main_#t~malloc6#1.base|) (= |ULTIMATE.start_main_#t~malloc6#1.offset| 0) (= |ULTIMATE.start_strlen_#in~s#1.offset| 0) (<= 0 |ULTIMATE.start_strlen_~s#1.offset|) (<= 1 |ULTIMATE.start_main_~in_len~0#1|) (<= 2 |ULTIMATE.start_strlen_#in~s#1.base|))' at error location [2023-11-06 21:06:31,422 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-06 21:06:31,422 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 21:06:31,423 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 16 [2023-11-06 21:06:31,423 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1503691667] [2023-11-06 21:06:31,423 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 21:06:31,423 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-11-06 21:06:31,423 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-06 21:06:31,424 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-11-06 21:06:31,424 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=393, Unknown=1, NotChecked=0, Total=462 [2023-11-06 21:06:31,425 INFO L87 Difference]: Start difference. First operand 10 states and 10 transitions. Second operand has 17 states, 16 states have (on average 1.4375) internal successors, (23), 17 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 21:06:32,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 21:06:32,127 INFO L93 Difference]: Finished difference Result 10 states and 10 transitions. [2023-11-06 21:06:32,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-06 21:06:32,127 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 1.4375) internal successors, (23), 17 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2023-11-06 21:06:32,128 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 21:06:32,128 INFO L225 Difference]: With dead ends: 10 [2023-11-06 21:06:32,128 INFO L226 Difference]: Without dead ends: 0 [2023-11-06 21:06:32,129 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 8 SyntacticMatches, 3 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=154, Invalid=657, Unknown=1, NotChecked=0, Total=812 [2023-11-06 21:06:32,129 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 22 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 77 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 82 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 77 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-06 21:06:32,130 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 1 Invalid, 82 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 77 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-06 21:06:32,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2023-11-06 21:06:32,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2023-11-06 21:06:32,131 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 21:06:32,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2023-11-06 21:06:32,131 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 9 [2023-11-06 21:06:32,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 21:06:32,131 INFO L495 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2023-11-06 21:06:32,131 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 1.4375) internal successors, (23), 17 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 21:06:32,132 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2023-11-06 21:06:32,132 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2023-11-06 21:06:32,134 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 5 remaining) [2023-11-06 21:06:32,135 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 5 remaining) [2023-11-06 21:06:32,135 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 5 remaining) [2023-11-06 21:06:32,135 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (1 of 5 remaining) [2023-11-06 21:06:32,135 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK (0 of 5 remaining) [2023-11-06 21:06:32,146 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f21e107-f4ea-4cba-91df-e9350350ed5a/bin/utaipan-verify-FOvIYxoinp/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-06 21:06:32,336 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f21e107-f4ea-4cba-91df-e9350350ed5a/bin/utaipan-verify-FOvIYxoinp/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:06:32,339 INFO L445 BasicCegarLoop]: Path program histogram: [2, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:06:32,342 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-11-06 21:06:32,345 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.11 09:06:32 BoogieIcfgContainer [2023-11-06 21:06:32,345 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-11-06 21:06:32,346 INFO L112 PluginConnector]: ------------------------Witness Printer---------------------------- [2023-11-06 21:06:32,346 INFO L270 PluginConnector]: Initializing Witness Printer... [2023-11-06 21:06:32,346 INFO L274 PluginConnector]: Witness Printer initialized [2023-11-06 21:06:32,346 INFO L184 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 09:06:22" (3/4) ... [2023-11-06 21:06:32,348 INFO L137 WitnessPrinter]: Generating witness for correct program [2023-11-06 21:06:32,356 INFO L939 BoogieBacktranslator]: Reduced CFG by removing 14 nodes and edges [2023-11-06 21:06:32,357 INFO L939 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2023-11-06 21:06:32,357 INFO L939 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2023-11-06 21:06:32,357 INFO L939 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2023-11-06 21:06:32,406 INFO L149 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f21e107-f4ea-4cba-91df-e9350350ed5a/bin/utaipan-verify-FOvIYxoinp/witness.graphml.graphml [2023-11-06 21:06:32,406 INFO L149 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f21e107-f4ea-4cba-91df-e9350350ed5a/bin/utaipan-verify-FOvIYxoinp/witness.graphml.yaml [2023-11-06 21:06:32,406 INFO L131 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2023-11-06 21:06:32,408 INFO L158 Benchmark]: Toolchain (without parser) took 10465.05ms. Allocated memory was 151.0MB in the beginning and 220.2MB in the end (delta: 69.2MB). Free memory was 107.5MB in the beginning and 177.4MB in the end (delta: -70.0MB). Peak memory consumption was 1.1MB. Max. memory is 16.1GB. [2023-11-06 21:06:32,408 INFO L158 Benchmark]: CDTParser took 0.29ms. Allocated memory is still 104.9MB. Free memory is still 55.4MB. There was no memory consumed. Max. memory is 16.1GB. [2023-11-06 21:06:32,409 INFO L158 Benchmark]: CACSL2BoogieTranslator took 448.68ms. Allocated memory is still 151.0MB. Free memory was 107.1MB in the beginning and 91.6MB in the end (delta: 15.5MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. [2023-11-06 21:06:32,409 INFO L158 Benchmark]: Boogie Procedure Inliner took 53.63ms. Allocated memory is still 151.0MB. Free memory was 91.5MB in the beginning and 89.8MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2023-11-06 21:06:32,409 INFO L158 Benchmark]: Boogie Preprocessor took 61.54ms. Allocated memory is still 151.0MB. Free memory was 89.8MB in the beginning and 88.2MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2023-11-06 21:06:32,410 INFO L158 Benchmark]: RCFGBuilder took 376.66ms. Allocated memory is still 151.0MB. Free memory was 88.2MB in the beginning and 119.2MB in the end (delta: -31.0MB). Peak memory consumption was 13.4MB. Max. memory is 16.1GB. [2023-11-06 21:06:32,410 INFO L158 Benchmark]: TraceAbstraction took 9456.77ms. Allocated memory was 151.0MB in the beginning and 220.2MB in the end (delta: 69.2MB). Free memory was 118.3MB in the beginning and 180.6MB in the end (delta: -62.3MB). Peak memory consumption was 6.5MB. Max. memory is 16.1GB. [2023-11-06 21:06:32,411 INFO L158 Benchmark]: Witness Printer took 60.86ms. Allocated memory is still 220.2MB. Free memory was 180.6MB in the beginning and 177.4MB in the end (delta: 3.1MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2023-11-06 21:06:32,416 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.29ms. Allocated memory is still 104.9MB. Free memory is still 55.4MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 448.68ms. Allocated memory is still 151.0MB. Free memory was 107.1MB in the beginning and 91.6MB in the end (delta: 15.5MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 53.63ms. Allocated memory is still 151.0MB. Free memory was 91.5MB in the beginning and 89.8MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 61.54ms. Allocated memory is still 151.0MB. Free memory was 89.8MB in the beginning and 88.2MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 376.66ms. Allocated memory is still 151.0MB. Free memory was 88.2MB in the beginning and 119.2MB in the end (delta: -31.0MB). Peak memory consumption was 13.4MB. Max. memory is 16.1GB. * TraceAbstraction took 9456.77ms. Allocated memory was 151.0MB in the beginning and 220.2MB in the end (delta: 69.2MB). Free memory was 118.3MB in the beginning and 180.6MB in the end (delta: -62.3MB). Peak memory consumption was 6.5MB. Max. memory is 16.1GB. * Witness Printer took 60.86ms. Allocated memory is still 220.2MB. Free memory was 180.6MB in the beginning and 177.4MB 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: 512]: 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, 15 locations, 5 error locations. Started 1 CEGAR loops. OverallTime: 9.4s, OverallIterations: 9, TraceHistogramMax: 2, PathProgramHistogramMax: 2, EmptinessCheckTime: 0.0s, AutomataDifference: 2.7s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 134 SdHoareTripleChecker+Valid, 0.4s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 134 mSDsluCounter, 82 SdHoareTripleChecker+Invalid, 0.4s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 30 mSDsCounter, 10 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 222 IncrementalHoareTripleChecker+Invalid, 232 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 10 mSolverCounterUnsat, 52 mSDtfsCounter, 222 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 85 GetRequests, 21 SyntacticMatches, 5 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 139 ImplicationChecksByTransitivity, 4.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=15occurred in iteration=0, InterpolantAutomatonStates: 41, 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, 9 MinimizatonAttempts, 8 StatesRemovedByMinimization, 2 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 3.5s InterpolantComputationTime, 66 NumberOfCodeBlocks, 66 NumberOfCodeBlocksAsserted, 13 NumberOfCheckSat, 69 ConstructedInterpolants, 6 QuantifiedInterpolants, 799 SizeOfPredicates, 20 NumberOfNonLiveVariables, 129 ConjunctsInSsa, 49 ConjunctsInUnsatCore, 13 InterpolantComputations, 7 PerfectInterpolantSequences, 0/15 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 5 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2023-11-06 21:06:32,436 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f21e107-f4ea-4cba-91df-e9350350ed5a/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