./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/termination-dietlibc/dirname-2.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version cf1a7837 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_ad4423dd-b636-4a99-8e68-b2d3170e9bfc/bin/utaipan-verify-NcY6lQBIFX/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad4423dd-b636-4a99-8e68-b2d3170e9bfc/bin/utaipan-verify-NcY6lQBIFX/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad4423dd-b636-4a99-8e68-b2d3170e9bfc/bin/utaipan-verify-NcY6lQBIFX/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad4423dd-b636-4a99-8e68-b2d3170e9bfc/bin/utaipan-verify-NcY6lQBIFX/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/termination-dietlibc/dirname-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad4423dd-b636-4a99-8e68-b2d3170e9bfc/bin/utaipan-verify-NcY6lQBIFX/config/svcomp-DerefFreeMemtrack-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad4423dd-b636-4a99-8e68-b2d3170e9bfc/bin/utaipan-verify-NcY6lQBIFX --witnessprinter.witness.filename witness --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 c17dc684f0856c2cb34d9c0f310a5ac71ddc07f596d7c8c46ee2d12464efc754 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-cf1a783 [2023-11-12 00:57:02,480 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-12 00:57:02,598 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad4423dd-b636-4a99-8e68-b2d3170e9bfc/bin/utaipan-verify-NcY6lQBIFX/config/svcomp-DerefFreeMemtrack-64bit-Taipan_Default.epf [2023-11-12 00:57:02,604 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-12 00:57:02,604 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-12 00:57:02,631 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-12 00:57:02,632 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-12 00:57:02,633 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-12 00:57:02,633 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-12 00:57:02,634 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-12 00:57:02,635 INFO L153 SettingsManager]: * User list type=DISABLED [2023-11-12 00:57:02,635 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-11-12 00:57:02,636 INFO L153 SettingsManager]: * Explicit value domain=true [2023-11-12 00:57:02,636 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-11-12 00:57:02,637 INFO L153 SettingsManager]: * Octagon Domain=false [2023-11-12 00:57:02,637 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-11-12 00:57:02,638 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-11-12 00:57:02,638 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-11-12 00:57:02,639 INFO L153 SettingsManager]: * Interval Domain=false [2023-11-12 00:57:02,639 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-11-12 00:57:02,640 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-11-12 00:57:02,647 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-11-12 00:57:02,647 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-12 00:57:02,648 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-12 00:57:02,648 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-12 00:57:02,649 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-12 00:57:02,649 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-12 00:57:02,649 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-11-12 00:57:02,650 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2023-11-12 00:57:02,650 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-11-12 00:57:02,651 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-12 00:57:02,651 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-11-12 00:57:02,651 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-12 00:57:02,652 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-12 00:57:02,652 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-12 00:57:02,653 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-12 00:57:02,653 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-12 00:57:02,653 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-12 00:57:02,654 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-12 00:57:02,654 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-11-12 00:57:02,655 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-12 00:57:02,656 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-11-12 00:57:02,657 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-12 00:57:02,657 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_ad4423dd-b636-4a99-8e68-b2d3170e9bfc/bin/utaipan-verify-NcY6lQBIFX/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad4423dd-b636-4a99-8e68-b2d3170e9bfc/bin/utaipan-verify-NcY6lQBIFX Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c17dc684f0856c2cb34d9c0f310a5ac71ddc07f596d7c8c46ee2d12464efc754 [2023-11-12 00:57:03,028 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-12 00:57:03,053 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-12 00:57:03,056 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-12 00:57:03,058 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-12 00:57:03,058 INFO L274 PluginConnector]: CDTParser initialized [2023-11-12 00:57:03,060 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad4423dd-b636-4a99-8e68-b2d3170e9bfc/bin/utaipan-verify-NcY6lQBIFX/../../sv-benchmarks/c/termination-dietlibc/dirname-2.i [2023-11-12 00:57:06,286 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-12 00:57:06,671 INFO L384 CDTParser]: Found 1 translation units. [2023-11-12 00:57:06,672 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad4423dd-b636-4a99-8e68-b2d3170e9bfc/sv-benchmarks/c/termination-dietlibc/dirname-2.i [2023-11-12 00:57:06,693 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad4423dd-b636-4a99-8e68-b2d3170e9bfc/bin/utaipan-verify-NcY6lQBIFX/data/7d01c728f/f5b27892cb93480db07cb8e66c4c2296/FLAG68f945a23 [2023-11-12 00:57:06,711 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad4423dd-b636-4a99-8e68-b2d3170e9bfc/bin/utaipan-verify-NcY6lQBIFX/data/7d01c728f/f5b27892cb93480db07cb8e66c4c2296 [2023-11-12 00:57:06,713 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-12 00:57:06,715 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-12 00:57:06,717 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-12 00:57:06,717 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-12 00:57:06,722 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-12 00:57:06,722 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 12:57:06" (1/1) ... [2023-11-12 00:57:06,723 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3b855673 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:57:06, skipping insertion in model container [2023-11-12 00:57:06,723 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 12:57:06" (1/1) ... [2023-11-12 00:57:06,790 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-12 00:57:07,089 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-12 00:57:07,115 INFO L202 MainTranslator]: Completed pre-run [2023-11-12 00:57:07,184 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-12 00:57:07,224 INFO L206 MainTranslator]: Completed translation [2023-11-12 00:57:07,224 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:57:07 WrapperNode [2023-11-12 00:57:07,224 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-12 00:57:07,226 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-12 00:57:07,226 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-12 00:57:07,226 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-12 00:57:07,234 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:57:07" (1/1) ... [2023-11-12 00:57:07,254 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:57:07" (1/1) ... [2023-11-12 00:57:07,286 INFO L138 Inliner]: procedures = 114, calls = 16, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 94 [2023-11-12 00:57:07,286 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-12 00:57:07,287 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-12 00:57:07,287 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-12 00:57:07,287 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-12 00:57:07,297 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:57:07" (1/1) ... [2023-11-12 00:57:07,298 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:57:07" (1/1) ... [2023-11-12 00:57:07,301 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:57:07" (1/1) ... [2023-11-12 00:57:07,302 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:57:07" (1/1) ... [2023-11-12 00:57:07,309 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:57:07" (1/1) ... [2023-11-12 00:57:07,313 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:57:07" (1/1) ... [2023-11-12 00:57:07,315 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:57:07" (1/1) ... [2023-11-12 00:57:07,316 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:57:07" (1/1) ... [2023-11-12 00:57:07,319 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-12 00:57:07,320 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-12 00:57:07,320 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-12 00:57:07,320 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-12 00:57:07,321 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:57:07" (1/1) ... [2023-11-12 00:57:07,328 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-12 00:57:07,343 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad4423dd-b636-4a99-8e68-b2d3170e9bfc/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 00:57:07,360 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad4423dd-b636-4a99-8e68-b2d3170e9bfc/bin/utaipan-verify-NcY6lQBIFX/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-12 00:57:07,371 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad4423dd-b636-4a99-8e68-b2d3170e9bfc/bin/utaipan-verify-NcY6lQBIFX/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-12 00:57:07,399 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-12 00:57:07,400 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-12 00:57:07,400 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-12 00:57:07,400 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-12 00:57:07,400 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-12 00:57:07,401 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-12 00:57:07,488 INFO L236 CfgBuilder]: Building ICFG [2023-11-12 00:57:07,490 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-12 00:57:07,781 INFO L277 CfgBuilder]: Performing block encoding [2023-11-12 00:57:07,831 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-12 00:57:07,847 INFO L302 CfgBuilder]: Removed 4 assume(true) statements. [2023-11-12 00:57:07,850 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 12:57:07 BoogieIcfgContainer [2023-11-12 00:57:07,850 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-12 00:57:07,853 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-12 00:57:07,857 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-12 00:57:07,861 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-12 00:57:07,862 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.11 12:57:06" (1/3) ... [2023-11-12 00:57:07,863 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7618dd44 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 12:57:07, skipping insertion in model container [2023-11-12 00:57:07,863 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:57:07" (2/3) ... [2023-11-12 00:57:07,864 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7618dd44 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 12:57:07, skipping insertion in model container [2023-11-12 00:57:07,865 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 12:57:07" (3/3) ... [2023-11-12 00:57:07,867 INFO L112 eAbstractionObserver]: Analyzing ICFG dirname-2.i [2023-11-12 00:57:07,884 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-12 00:57:07,885 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 19 error locations. [2023-11-12 00:57:07,925 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-12 00:57:07,933 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;@4ef9e70e, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-12 00:57:07,933 INFO L358 AbstractCegarLoop]: Starting to check reachability of 19 error locations. [2023-11-12 00:57:07,938 INFO L276 IsEmpty]: Start isEmpty. Operand has 44 states, 24 states have (on average 2.2916666666666665) internal successors, (55), 43 states have internal predecessors, (55), 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) [2023-11-12 00:57:07,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2023-11-12 00:57:07,946 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:57:07,946 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2023-11-12 00:57:07,948 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2023-11-12 00:57:07,955 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:57:07,955 INFO L85 PathProgramCache]: Analyzing trace with hash 154039, now seen corresponding path program 1 times [2023-11-12 00:57:07,963 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:57:07,964 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1577929474] [2023-11-12 00:57:07,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:57:07,965 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:57:08,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:57:08,121 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 00:57:08,122 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:57:08,122 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1577929474] [2023-11-12 00:57:08,123 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1577929474] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 00:57:08,123 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 00:57:08,124 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-12 00:57:08,125 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1364379316] [2023-11-12 00:57:08,126 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 00:57:08,131 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-12 00:57:08,131 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:57:08,175 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-12 00:57:08,176 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 00:57:08,179 INFO L87 Difference]: Start difference. First operand has 44 states, 24 states have (on average 2.2916666666666665) internal successors, (55), 43 states have internal predecessors, (55), 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) [2023-11-12 00:57:08,279 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:57:08,279 INFO L93 Difference]: Finished difference Result 45 states and 52 transitions. [2023-11-12 00:57:08,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-12 00:57:08,283 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 [2023-11-12 00:57:08,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:57:08,293 INFO L225 Difference]: With dead ends: 45 [2023-11-12 00:57:08,294 INFO L226 Difference]: Without dead ends: 43 [2023-11-12 00:57:08,298 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 [2023-11-12 00:57:08,303 INFO L413 NwaCegarLoop]: 44 mSDtfsCounter, 1 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 71 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-12 00:57:08,304 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 71 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-12 00:57:08,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2023-11-12 00:57:08,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2023-11-12 00:57:08,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 24 states have (on average 2.0416666666666665) internal successors, (49), 42 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 00:57:08,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 49 transitions. [2023-11-12 00:57:08,345 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 49 transitions. Word has length 3 [2023-11-12 00:57:08,345 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:57:08,345 INFO L495 AbstractCegarLoop]: Abstraction has 43 states and 49 transitions. [2023-11-12 00:57:08,346 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) [2023-11-12 00:57:08,347 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 49 transitions. [2023-11-12 00:57:08,348 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2023-11-12 00:57:08,348 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:57:08,348 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2023-11-12 00:57:08,348 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-12 00:57:08,350 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2023-11-12 00:57:08,351 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:57:08,351 INFO L85 PathProgramCache]: Analyzing trace with hash 153986, now seen corresponding path program 1 times [2023-11-12 00:57:08,351 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:57:08,352 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1130201495] [2023-11-12 00:57:08,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:57:08,352 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:57:08,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:57:08,504 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 00:57:08,505 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:57:08,505 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1130201495] [2023-11-12 00:57:08,505 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1130201495] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 00:57:08,506 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 00:57:08,506 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-12 00:57:08,506 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [288202893] [2023-11-12 00:57:08,506 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 00:57:08,507 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-12 00:57:08,508 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:57:08,508 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-12 00:57:08,509 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 00:57:08,509 INFO L87 Difference]: Start difference. First operand 43 states and 49 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) [2023-11-12 00:57:08,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:57:08,564 INFO L93 Difference]: Finished difference Result 42 states and 48 transitions. [2023-11-12 00:57:08,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-12 00:57:08,566 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 [2023-11-12 00:57:08,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:57:08,567 INFO L225 Difference]: With dead ends: 42 [2023-11-12 00:57:08,567 INFO L226 Difference]: Without dead ends: 42 [2023-11-12 00:57:08,571 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 [2023-11-12 00:57:08,574 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 44 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-12 00:57:08,575 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [44 Valid, 28 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-12 00:57:08,579 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2023-11-12 00:57:08,585 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2023-11-12 00:57:08,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 24 states have (on average 2.0) internal successors, (48), 41 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 00:57:08,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 48 transitions. [2023-11-12 00:57:08,588 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 48 transitions. Word has length 3 [2023-11-12 00:57:08,589 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:57:08,589 INFO L495 AbstractCegarLoop]: Abstraction has 42 states and 48 transitions. [2023-11-12 00:57:08,589 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) [2023-11-12 00:57:08,589 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 48 transitions. [2023-11-12 00:57:08,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2023-11-12 00:57:08,590 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:57:08,590 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2023-11-12 00:57:08,590 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-12 00:57:08,591 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2023-11-12 00:57:08,592 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:57:08,592 INFO L85 PathProgramCache]: Analyzing trace with hash 153987, now seen corresponding path program 1 times [2023-11-12 00:57:08,592 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:57:08,593 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1795221156] [2023-11-12 00:57:08,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:57:08,594 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:57:08,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:57:08,858 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 00:57:08,858 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:57:08,858 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1795221156] [2023-11-12 00:57:08,859 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1795221156] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 00:57:08,859 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 00:57:08,859 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-12 00:57:08,859 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [208667065] [2023-11-12 00:57:08,860 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 00:57:08,860 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-12 00:57:08,860 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:57:08,861 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-12 00:57:08,861 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-12 00:57:08,861 INFO L87 Difference]: Start difference. First operand 42 states and 48 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) [2023-11-12 00:57:08,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:57:08,957 INFO L93 Difference]: Finished difference Result 41 states and 47 transitions. [2023-11-12 00:57:08,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-12 00:57:08,958 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 [2023-11-12 00:57:08,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:57:08,959 INFO L225 Difference]: With dead ends: 41 [2023-11-12 00:57:08,959 INFO L226 Difference]: Without dead ends: 41 [2023-11-12 00:57:08,960 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 [2023-11-12 00:57:08,961 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 90 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-12 00:57:08,962 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [90 Valid, 28 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-12 00:57:08,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2023-11-12 00:57:08,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2023-11-12 00:57:08,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 24 states have (on average 1.9583333333333333) internal successors, (47), 40 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 00:57:08,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 47 transitions. [2023-11-12 00:57:08,968 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 47 transitions. Word has length 3 [2023-11-12 00:57:08,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:57:08,969 INFO L495 AbstractCegarLoop]: Abstraction has 41 states and 47 transitions. [2023-11-12 00:57:08,969 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) [2023-11-12 00:57:08,969 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 47 transitions. [2023-11-12 00:57:08,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2023-11-12 00:57:08,970 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:57:08,970 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2023-11-12 00:57:08,970 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-12 00:57:08,970 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2023-11-12 00:57:08,971 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:57:08,971 INFO L85 PathProgramCache]: Analyzing trace with hash 295992119, now seen corresponding path program 1 times [2023-11-12 00:57:08,971 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:57:08,972 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1837680025] [2023-11-12 00:57:08,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:57:08,972 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:57:08,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:57:09,036 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 00:57:09,036 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:57:09,036 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1837680025] [2023-11-12 00:57:09,037 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1837680025] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 00:57:09,037 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 00:57:09,037 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-12 00:57:09,037 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2112478245] [2023-11-12 00:57:09,038 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 00:57:09,038 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-12 00:57:09,038 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:57:09,039 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-12 00:57:09,039 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-12 00:57:09,039 INFO L87 Difference]: Start difference. First operand 41 states and 47 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) [2023-11-12 00:57:09,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:57:09,090 INFO L93 Difference]: Finished difference Result 41 states and 46 transitions. [2023-11-12 00:57:09,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-12 00:57:09,091 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 [2023-11-12 00:57:09,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:57:09,092 INFO L225 Difference]: With dead ends: 41 [2023-11-12 00:57:09,093 INFO L226 Difference]: Without dead ends: 41 [2023-11-12 00:57:09,093 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 [2023-11-12 00:57:09,095 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 85 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 85 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-12 00:57:09,095 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [85 Valid, 29 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-12 00:57:09,096 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2023-11-12 00:57:09,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2023-11-12 00:57:09,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 24 states have (on average 1.9166666666666667) internal successors, (46), 40 states have internal predecessors, (46), 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) [2023-11-12 00:57:09,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 46 transitions. [2023-11-12 00:57:09,101 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 46 transitions. Word has length 6 [2023-11-12 00:57:09,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:57:09,101 INFO L495 AbstractCegarLoop]: Abstraction has 41 states and 46 transitions. [2023-11-12 00:57:09,102 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) [2023-11-12 00:57:09,102 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 46 transitions. [2023-11-12 00:57:09,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2023-11-12 00:57:09,102 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:57:09,103 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-11-12 00:57:09,103 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-12 00:57:09,103 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2023-11-12 00:57:09,104 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:57:09,104 INFO L85 PathProgramCache]: Analyzing trace with hash 585783683, now seen corresponding path program 1 times [2023-11-12 00:57:09,104 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:57:09,105 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [77717423] [2023-11-12 00:57:09,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:57:09,105 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:57:09,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:57:09,183 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 00:57:09,184 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:57:09,184 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [77717423] [2023-11-12 00:57:09,184 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [77717423] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 00:57:09,184 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 00:57:09,185 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-12 00:57:09,185 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1041928876] [2023-11-12 00:57:09,185 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 00:57:09,186 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-12 00:57:09,186 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:57:09,186 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-12 00:57:09,187 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-12 00:57:09,187 INFO L87 Difference]: Start difference. First operand 41 states and 46 transitions. Second operand has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 00:57:09,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:57:09,263 INFO L93 Difference]: Finished difference Result 38 states and 43 transitions. [2023-11-12 00:57:09,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-12 00:57:09,264 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2023-11-12 00:57:09,264 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:57:09,265 INFO L225 Difference]: With dead ends: 38 [2023-11-12 00:57:09,265 INFO L226 Difference]: Without dead ends: 38 [2023-11-12 00:57:09,266 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 [2023-11-12 00:57:09,267 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 42 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 63 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 66 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 63 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-12 00:57:09,268 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [42 Valid, 19 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 63 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-12 00:57:09,269 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2023-11-12 00:57:09,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2023-11-12 00:57:09,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 24 states have (on average 1.7916666666666667) internal successors, (43), 37 states have internal predecessors, (43), 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) [2023-11-12 00:57:09,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 43 transitions. [2023-11-12 00:57:09,273 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 43 transitions. Word has length 7 [2023-11-12 00:57:09,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:57:09,273 INFO L495 AbstractCegarLoop]: Abstraction has 38 states and 43 transitions. [2023-11-12 00:57:09,274 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 00:57:09,274 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 43 transitions. [2023-11-12 00:57:09,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2023-11-12 00:57:09,274 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:57:09,275 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-11-12 00:57:09,275 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-12 00:57:09,275 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2023-11-12 00:57:09,276 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:57:09,276 INFO L85 PathProgramCache]: Analyzing trace with hash 585783684, now seen corresponding path program 1 times [2023-11-12 00:57:09,276 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:57:09,277 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [833170635] [2023-11-12 00:57:09,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:57:09,277 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:57:09,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:57:09,514 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 00:57:09,514 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:57:09,515 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [833170635] [2023-11-12 00:57:09,515 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [833170635] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 00:57:09,516 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 00:57:09,516 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-12 00:57:09,516 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [688058240] [2023-11-12 00:57:09,516 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 00:57:09,517 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-12 00:57:09,517 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:57:09,518 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-12 00:57:09,519 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-12 00:57:09,519 INFO L87 Difference]: Start difference. First operand 38 states and 43 transitions. Second operand has 5 states, 4 states have (on average 1.75) internal successors, (7), 5 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 00:57:09,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:57:09,686 INFO L93 Difference]: Finished difference Result 43 states and 49 transitions. [2023-11-12 00:57:09,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-12 00:57:09,687 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 1.75) internal successors, (7), 5 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2023-11-12 00:57:09,687 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:57:09,690 INFO L225 Difference]: With dead ends: 43 [2023-11-12 00:57:09,691 INFO L226 Difference]: Without dead ends: 43 [2023-11-12 00:57:09,694 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-11-12 00:57:09,697 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 93 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 65 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 93 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 66 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 65 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-12 00:57:09,699 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [93 Valid, 25 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 65 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-12 00:57:09,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2023-11-12 00:57:09,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 41. [2023-11-12 00:57:09,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 27 states have (on average 1.7037037037037037) internal successors, (46), 40 states have internal predecessors, (46), 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) [2023-11-12 00:57:09,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 46 transitions. [2023-11-12 00:57:09,713 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 46 transitions. Word has length 7 [2023-11-12 00:57:09,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:57:09,713 INFO L495 AbstractCegarLoop]: Abstraction has 41 states and 46 transitions. [2023-11-12 00:57:09,713 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 1.75) internal successors, (7), 5 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 00:57:09,714 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 46 transitions. [2023-11-12 00:57:09,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2023-11-12 00:57:09,714 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:57:09,714 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 00:57:09,714 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-12 00:57:09,715 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2023-11-12 00:57:09,715 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:57:09,715 INFO L85 PathProgramCache]: Analyzing trace with hash -1862463245, now seen corresponding path program 1 times [2023-11-12 00:57:09,715 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:57:09,716 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [807403151] [2023-11-12 00:57:09,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:57:09,716 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:57:09,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:57:10,202 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 00:57:10,202 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:57:10,202 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [807403151] [2023-11-12 00:57:10,202 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [807403151] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 00:57:10,202 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [806160347] [2023-11-12 00:57:10,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:57:10,203 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:57:10,203 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad4423dd-b636-4a99-8e68-b2d3170e9bfc/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 00:57:10,211 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad4423dd-b636-4a99-8e68-b2d3170e9bfc/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 00:57:10,235 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad4423dd-b636-4a99-8e68-b2d3170e9bfc/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-12 00:57:10,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:57:10,316 INFO L262 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 29 conjunts are in the unsatisfiable core [2023-11-12 00:57:10,322 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 00:57:10,433 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 [2023-11-12 00:57:10,722 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-12 00:57:10,723 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 [2023-11-12 00:57:10,811 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 00:57:10,811 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 00:57:11,232 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 [2023-11-12 00:57:11,243 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 [2023-11-12 00:57:11,256 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 [2023-11-12 00:57:11,271 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 00:57:11,271 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [806160347] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 00:57:11,271 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1494802933] [2023-11-12 00:57:11,294 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2023-11-12 00:57:11,294 INFO L166 IcfgInterpreter]: Building call graph [2023-11-12 00:57:11,299 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-12 00:57:11,305 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-12 00:57:11,305 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-12 00:57:12,206 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-12 00:57:13,411 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '651#(and (= |ULTIMATE.start_dirname_#in~path#1.offset| 0) (<= 1 |#StackHeapBarrier|) (<= 2 |ULTIMATE.start_strrchr_#in~t#1.base|) (<= 2 |ULTIMATE.start_dirname_#in~path#1.base|) (<= 2 |ULTIMATE.start_dirname_~path#1.base|) (= 47 |ULTIMATE.start_strrchr_~c#1|) (<= 2 |ULTIMATE.start_strrchr_~t#1.base|) (<= 2 |ULTIMATE.start_main_#t~malloc12#1.base|) (<= 2 |ULTIMATE.start_main_~in~0#1.base|) (= |ULTIMATE.start_main_~in~0#1.offset| 0) (<= |ULTIMATE.start_main_~in_len~0#1| 2147483647) (<= (select |#length| |ULTIMATE.start_strrchr_~t#1.base|) |ULTIMATE.start_strrchr_~t#1.offset|) (<= 0 |ULTIMATE.start_strrchr_~t#1.offset|) (= |ULTIMATE.start_strrchr_#in~t#1.offset| 0) (= |ULTIMATE.start_strrchr_#in~c#1| 47) (= |ULTIMATE.start_main_#t~malloc12#1.offset| 0) (= |ULTIMATE.start_dirname_~path#1.offset| 0) (= |ULTIMATE.start_strrchr_~ch~0#1| 47) (<= 1 |ULTIMATE.start_main_~in_len~0#1|))' at error location [2023-11-12 00:57:13,412 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-12 00:57:13,412 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-12 00:57:13,412 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 16 [2023-11-12 00:57:13,412 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [725488510] [2023-11-12 00:57:13,413 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-12 00:57:13,413 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-11-12 00:57:13,413 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:57:13,414 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-11-12 00:57:13,415 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=476, Unknown=0, NotChecked=0, Total=552 [2023-11-12 00:57:13,415 INFO L87 Difference]: Start difference. First operand 41 states and 46 transitions. Second operand has 17 states, 16 states have (on average 1.75) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 00:57:14,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:57:14,170 INFO L93 Difference]: Finished difference Result 47 states and 54 transitions. [2023-11-12 00:57:14,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-12 00:57:14,172 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 1.75) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2023-11-12 00:57:14,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:57:14,173 INFO L225 Difference]: With dead ends: 47 [2023-11-12 00:57:14,173 INFO L226 Difference]: Without dead ends: 47 [2023-11-12 00:57:14,174 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=138, Invalid=674, Unknown=0, NotChecked=0, Total=812 [2023-11-12 00:57:14,174 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 212 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 212 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 212 SdHoareTripleChecker+Valid, 73 SdHoareTripleChecker+Invalid, 223 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 212 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-12 00:57:14,175 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [212 Valid, 73 Invalid, 223 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 212 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-12 00:57:14,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2023-11-12 00:57:14,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 43. [2023-11-12 00:57:14,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 30 states have (on average 1.6333333333333333) internal successors, (49), 42 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 00:57:14,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 49 transitions. [2023-11-12 00:57:14,180 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 49 transitions. Word has length 11 [2023-11-12 00:57:14,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:57:14,180 INFO L495 AbstractCegarLoop]: Abstraction has 43 states and 49 transitions. [2023-11-12 00:57:14,181 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 1.75) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 00:57:14,181 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 49 transitions. [2023-11-12 00:57:14,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2023-11-12 00:57:14,182 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:57:14,182 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 00:57:14,193 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad4423dd-b636-4a99-8e68-b2d3170e9bfc/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-12 00:57:14,382 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad4423dd-b636-4a99-8e68-b2d3170e9bfc/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:57:14,383 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2023-11-12 00:57:14,383 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:57:14,383 INFO L85 PathProgramCache]: Analyzing trace with hash -1901821395, now seen corresponding path program 1 times [2023-11-12 00:57:14,384 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:57:14,384 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1512941598] [2023-11-12 00:57:14,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:57:14,384 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:57:14,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:57:14,715 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 00:57:14,715 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:57:14,715 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1512941598] [2023-11-12 00:57:14,716 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1512941598] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 00:57:14,716 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 00:57:14,716 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2023-11-12 00:57:14,716 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [404491770] [2023-11-12 00:57:14,716 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 00:57:14,717 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-12 00:57:14,717 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:57:14,720 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-12 00:57:14,721 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2023-11-12 00:57:14,721 INFO L87 Difference]: Start difference. First operand 43 states and 49 transitions. Second operand has 9 states, 9 states have (on average 1.3333333333333333) internal successors, (12), 9 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) [2023-11-12 00:57:14,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:57:14,986 INFO L93 Difference]: Finished difference Result 49 states and 54 transitions. [2023-11-12 00:57:14,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-12 00:57:14,987 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 1.3333333333333333) internal successors, (12), 9 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2023-11-12 00:57:14,987 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:57:14,987 INFO L225 Difference]: With dead ends: 49 [2023-11-12 00:57:14,987 INFO L226 Difference]: Without dead ends: 49 [2023-11-12 00:57:14,988 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=75, Invalid=197, Unknown=0, NotChecked=0, Total=272 [2023-11-12 00:57:14,988 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 100 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 131 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 100 SdHoareTripleChecker+Valid, 83 SdHoareTripleChecker+Invalid, 133 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 131 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-12 00:57:14,989 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [100 Valid, 83 Invalid, 133 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 131 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-12 00:57:14,989 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2023-11-12 00:57:14,994 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 45. [2023-11-12 00:57:14,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 32 states have (on average 1.59375) internal successors, (51), 44 states have internal predecessors, (51), 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) [2023-11-12 00:57:14,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 51 transitions. [2023-11-12 00:57:14,998 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 51 transitions. Word has length 12 [2023-11-12 00:57:14,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:57:14,999 INFO L495 AbstractCegarLoop]: Abstraction has 45 states and 51 transitions. [2023-11-12 00:57:15,003 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 1.3333333333333333) internal successors, (12), 9 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) [2023-11-12 00:57:15,003 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 51 transitions. [2023-11-12 00:57:15,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2023-11-12 00:57:15,005 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:57:15,006 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 00:57:15,006 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-11-12 00:57:15,006 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2023-11-12 00:57:15,007 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:57:15,007 INFO L85 PathProgramCache]: Analyzing trace with hash 1173078899, now seen corresponding path program 1 times [2023-11-12 00:57:15,007 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:57:15,011 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1702975548] [2023-11-12 00:57:15,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:57:15,011 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:57:15,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:57:15,091 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 00:57:15,092 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:57:15,092 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1702975548] [2023-11-12 00:57:15,092 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1702975548] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 00:57:15,092 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 00:57:15,092 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-12 00:57:15,093 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1282473464] [2023-11-12 00:57:15,093 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 00:57:15,093 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-12 00:57:15,093 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:57:15,094 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-12 00:57:15,094 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-12 00:57:15,094 INFO L87 Difference]: Start difference. First operand 45 states and 51 transitions. Second operand has 4 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 00:57:15,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:57:15,136 INFO L93 Difference]: Finished difference Result 44 states and 50 transitions. [2023-11-12 00:57:15,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-12 00:57:15,136 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2023-11-12 00:57:15,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:57:15,137 INFO L225 Difference]: With dead ends: 44 [2023-11-12 00:57:15,137 INFO L226 Difference]: Without dead ends: 39 [2023-11-12 00:57:15,138 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 [2023-11-12 00:57:15,139 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 29 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-12 00:57:15,139 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 48 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-12 00:57:15,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2023-11-12 00:57:15,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2023-11-12 00:57:15,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 27 states have (on average 1.5555555555555556) internal successors, (42), 38 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 00:57:15,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 42 transitions. [2023-11-12 00:57:15,143 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 42 transitions. Word has length 13 [2023-11-12 00:57:15,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:57:15,143 INFO L495 AbstractCegarLoop]: Abstraction has 39 states and 42 transitions. [2023-11-12 00:57:15,143 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 00:57:15,144 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 42 transitions. [2023-11-12 00:57:15,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2023-11-12 00:57:15,144 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:57:15,144 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2023-11-12 00:57:15,145 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-11-12 00:57:15,145 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2023-11-12 00:57:15,145 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:57:15,145 INFO L85 PathProgramCache]: Analyzing trace with hash -1091012382, now seen corresponding path program 2 times [2023-11-12 00:57:15,146 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:57:15,146 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1579650132] [2023-11-12 00:57:15,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:57:15,146 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:57:15,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:57:15,700 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 00:57:15,700 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:57:15,700 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1579650132] [2023-11-12 00:57:15,700 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1579650132] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 00:57:15,700 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1893054484] [2023-11-12 00:57:15,701 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-12 00:57:15,701 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:57:15,701 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad4423dd-b636-4a99-8e68-b2d3170e9bfc/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 00:57:15,702 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad4423dd-b636-4a99-8e68-b2d3170e9bfc/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 00:57:15,735 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad4423dd-b636-4a99-8e68-b2d3170e9bfc/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-12 00:57:15,787 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-11-12 00:57:15,787 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-12 00:57:15,789 INFO L262 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 35 conjunts are in the unsatisfiable core [2023-11-12 00:57:15,793 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 00:57:15,820 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 [2023-11-12 00:57:16,285 INFO L322 Elim1Store]: treesize reduction 4, result has 87.9 percent of original size [2023-11-12 00:57:16,286 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 26 treesize of output 39 [2023-11-12 00:57:16,435 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 00:57:16,436 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 00:57:17,010 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 27 treesize of output 23 [2023-11-12 00:57:17,029 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-12 00:57:17,030 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 43 treesize of output 47 [2023-11-12 00:57:17,043 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 [2023-11-12 00:57:17,070 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 00:57:17,070 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1893054484] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 00:57:17,070 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [858030483] [2023-11-12 00:57:17,075 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2023-11-12 00:57:17,076 INFO L166 IcfgInterpreter]: Building call graph [2023-11-12 00:57:17,076 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-12 00:57:17,076 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-12 00:57:17,077 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-12 00:57:17,852 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-12 00:57:18,971 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1072#(and (= |ULTIMATE.start_dirname_#in~path#1.offset| 0) (<= 1 |#StackHeapBarrier|) (<= 2 |ULTIMATE.start_strrchr_#in~t#1.base|) (<= 2 |ULTIMATE.start_dirname_#in~path#1.base|) (<= 2 |ULTIMATE.start_dirname_~path#1.base|) (= 47 |ULTIMATE.start_strrchr_~c#1|) (<= 2 |ULTIMATE.start_strrchr_~t#1.base|) (<= 2 |ULTIMATE.start_main_#t~malloc12#1.base|) (<= 2 |ULTIMATE.start_main_~in~0#1.base|) (= |ULTIMATE.start_main_~in~0#1.offset| 0) (<= |ULTIMATE.start_main_~in_len~0#1| 2147483647) (<= (select |#length| |ULTIMATE.start_strrchr_~t#1.base|) |ULTIMATE.start_strrchr_~t#1.offset|) (<= 0 |ULTIMATE.start_strrchr_~t#1.offset|) (= |ULTIMATE.start_strrchr_#in~t#1.offset| 0) (= |ULTIMATE.start_strrchr_#in~c#1| 47) (= |ULTIMATE.start_main_#t~malloc12#1.offset| 0) (= |ULTIMATE.start_dirname_~path#1.offset| 0) (= |ULTIMATE.start_strrchr_~ch~0#1| 47) (<= 1 |ULTIMATE.start_main_~in_len~0#1|))' at error location [2023-11-12 00:57:18,971 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-12 00:57:18,972 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-12 00:57:18,972 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 9] total 23 [2023-11-12 00:57:18,972 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1051273675] [2023-11-12 00:57:18,972 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-12 00:57:18,973 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-11-12 00:57:18,973 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:57:18,973 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-11-12 00:57:18,974 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=772, Unknown=0, NotChecked=0, Total=870 [2023-11-12 00:57:18,974 INFO L87 Difference]: Start difference. First operand 39 states and 42 transitions. Second operand has 24 states, 23 states have (on average 1.826086956521739) internal successors, (42), 24 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 00:57:20,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:57:20,506 INFO L93 Difference]: Finished difference Result 41 states and 45 transitions. [2023-11-12 00:57:20,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-12 00:57:20,507 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 1.826086956521739) internal successors, (42), 24 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2023-11-12 00:57:20,507 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:57:20,507 INFO L225 Difference]: With dead ends: 41 [2023-11-12 00:57:20,507 INFO L226 Difference]: Without dead ends: 41 [2023-11-12 00:57:20,508 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 19 SyntacticMatches, 4 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 258 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=233, Invalid=1173, Unknown=0, NotChecked=0, Total=1406 [2023-11-12 00:57:20,509 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 183 mSDsluCounter, 71 mSDsCounter, 0 mSdLazyCounter, 312 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 183 SdHoareTripleChecker+Valid, 83 SdHoareTripleChecker+Invalid, 324 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 312 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-12 00:57:20,509 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [183 Valid, 83 Invalid, 324 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 312 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-12 00:57:20,510 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2023-11-12 00:57:20,512 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 36. [2023-11-12 00:57:20,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 25 states have (on average 1.56) internal successors, (39), 35 states have internal predecessors, (39), 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) [2023-11-12 00:57:20,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 39 transitions. [2023-11-12 00:57:20,513 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 39 transitions. Word has length 15 [2023-11-12 00:57:20,513 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:57:20,514 INFO L495 AbstractCegarLoop]: Abstraction has 36 states and 39 transitions. [2023-11-12 00:57:20,514 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 1.826086956521739) internal successors, (42), 24 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 00:57:20,514 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 39 transitions. [2023-11-12 00:57:20,515 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2023-11-12 00:57:20,515 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:57:20,515 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 00:57:20,524 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad4423dd-b636-4a99-8e68-b2d3170e9bfc/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-11-12 00:57:20,720 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad4423dd-b636-4a99-8e68-b2d3170e9bfc/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-11-12 00:57:20,720 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2023-11-12 00:57:20,721 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:57:20,721 INFO L85 PathProgramCache]: Analyzing trace with hash 538318878, now seen corresponding path program 1 times [2023-11-12 00:57:20,721 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:57:20,721 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [362398720] [2023-11-12 00:57:20,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:57:20,721 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:57:20,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:57:21,207 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 00:57:21,207 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:57:21,207 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [362398720] [2023-11-12 00:57:21,207 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [362398720] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 00:57:21,207 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [674145100] [2023-11-12 00:57:21,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:57:21,208 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:57:21,208 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad4423dd-b636-4a99-8e68-b2d3170e9bfc/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 00:57:21,209 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad4423dd-b636-4a99-8e68-b2d3170e9bfc/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 00:57:21,231 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad4423dd-b636-4a99-8e68-b2d3170e9bfc/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-12 00:57:21,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:57:21,294 WARN L260 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 57 conjunts are in the unsatisfiable core [2023-11-12 00:57:21,296 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 00:57:21,802 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-12 00:57:21,803 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 86 treesize of output 58 [2023-11-12 00:57:22,142 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 00:57:22,142 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 00:57:22,412 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-12 00:57:22,413 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 25 [2023-11-12 00:57:23,151 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-12 00:57:23,151 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 141 treesize of output 233 [2023-11-12 00:57:29,850 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 00:57:29,851 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [674145100] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 00:57:29,851 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1219076275] [2023-11-12 00:57:29,855 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2023-11-12 00:57:29,855 INFO L166 IcfgInterpreter]: Building call graph [2023-11-12 00:57:29,856 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-12 00:57:29,856 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-12 00:57:29,857 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-12 00:57:30,404 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-12 00:57:31,723 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1293#(and (= |ULTIMATE.start_dirname_#in~path#1.offset| 0) (<= 1 |#StackHeapBarrier|) (or (< (+ |ULTIMATE.start_dirname_~c~0#1.offset| 1) 0) (< (select |#length| |ULTIMATE.start_dirname_~c~0#1.base|) (+ 2 |ULTIMATE.start_dirname_~c~0#1.offset|))) (<= 2 |ULTIMATE.start_dirname_#in~path#1.base|) (<= 2 |ULTIMATE.start_dirname_~path#1.base|) (<= 2 |ULTIMATE.start_main_#t~malloc12#1.base|) (<= 2 |ULTIMATE.start_main_~in~0#1.base|) (= |ULTIMATE.start_main_~in~0#1.offset| 0) (= |ULTIMATE.start_strrchr_#res#1.offset| |ULTIMATE.start_dirname_~c~0#1.offset|) (<= |ULTIMATE.start_main_~in_len~0#1| 2147483647) (= |ULTIMATE.start_main_#t~malloc12#1.offset| 0) (= |ULTIMATE.start_dirname_~c~0#1.base| |ULTIMATE.start_strrchr_#res#1.base|) (= |ULTIMATE.start_dirname_~path#1.offset| 0) (or (not (= |ULTIMATE.start_dirname_~c~0#1.offset| 0)) (not (= |ULTIMATE.start_dirname_~c~0#1.base| 0))) (<= 1 |ULTIMATE.start_main_~in_len~0#1|))' at error location [2023-11-12 00:57:31,723 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-12 00:57:31,723 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-12 00:57:31,723 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 31 [2023-11-12 00:57:31,723 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [212600647] [2023-11-12 00:57:31,724 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-12 00:57:31,724 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2023-11-12 00:57:31,724 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:57:31,725 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2023-11-12 00:57:31,726 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=188, Invalid=1534, Unknown=0, NotChecked=0, Total=1722 [2023-11-12 00:57:31,726 INFO L87 Difference]: Start difference. First operand 36 states and 39 transitions. Second operand has 32 states, 31 states have (on average 1.4838709677419355) internal successors, (46), 32 states have internal predecessors, (46), 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) [2023-11-12 00:57:37,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:57:37,185 INFO L93 Difference]: Finished difference Result 111 states and 124 transitions. [2023-11-12 00:57:37,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2023-11-12 00:57:37,186 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 31 states have (on average 1.4838709677419355) internal successors, (46), 32 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2023-11-12 00:57:37,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:57:37,187 INFO L225 Difference]: With dead ends: 111 [2023-11-12 00:57:37,187 INFO L226 Difference]: Without dead ends: 111 [2023-11-12 00:57:37,190 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1765 ImplicationChecksByTransitivity, 7.1s TimeCoverageRelationStatistics Valid=1230, Invalid=5910, Unknown=0, NotChecked=0, Total=7140 [2023-11-12 00:57:37,191 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 606 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 515 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 606 SdHoareTripleChecker+Valid, 74 SdHoareTripleChecker+Invalid, 534 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 515 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-11-12 00:57:37,191 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [606 Valid, 74 Invalid, 534 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 515 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-11-12 00:57:37,192 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2023-11-12 00:57:37,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 46. [2023-11-12 00:57:37,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 36 states have (on average 1.5277777777777777) internal successors, (55), 45 states have internal predecessors, (55), 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) [2023-11-12 00:57:37,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 55 transitions. [2023-11-12 00:57:37,195 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 55 transitions. Word has length 16 [2023-11-12 00:57:37,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:57:37,196 INFO L495 AbstractCegarLoop]: Abstraction has 46 states and 55 transitions. [2023-11-12 00:57:37,196 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 31 states have (on average 1.4838709677419355) internal successors, (46), 32 states have internal predecessors, (46), 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) [2023-11-12 00:57:37,196 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 55 transitions. [2023-11-12 00:57:37,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2023-11-12 00:57:37,197 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:57:37,197 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 00:57:37,206 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad4423dd-b636-4a99-8e68-b2d3170e9bfc/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-12 00:57:37,402 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad4423dd-b636-4a99-8e68-b2d3170e9bfc/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-11-12 00:57:37,403 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2023-11-12 00:57:37,403 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:57:37,403 INFO L85 PathProgramCache]: Analyzing trace with hash 538318877, now seen corresponding path program 1 times [2023-11-12 00:57:37,404 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:57:37,404 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1531413472] [2023-11-12 00:57:37,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:57:37,404 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:57:37,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:57:37,635 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 00:57:37,635 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:57:37,635 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1531413472] [2023-11-12 00:57:37,635 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1531413472] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 00:57:37,636 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [263639376] [2023-11-12 00:57:37,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:57:37,636 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:57:37,636 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad4423dd-b636-4a99-8e68-b2d3170e9bfc/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 00:57:37,637 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad4423dd-b636-4a99-8e68-b2d3170e9bfc/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 00:57:37,652 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad4423dd-b636-4a99-8e68-b2d3170e9bfc/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-12 00:57:37,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:57:37,724 INFO L262 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 34 conjunts are in the unsatisfiable core [2023-11-12 00:57:37,726 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 00:57:37,875 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-12 00:57:37,876 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 58 treesize of output 66 [2023-11-12 00:57:38,059 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 00:57:38,060 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 00:57:38,316 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-12 00:57:38,317 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 87 treesize of output 115 [2023-11-12 00:57:38,497 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 00:57:38,498 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [263639376] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 00:57:38,498 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [396776256] [2023-11-12 00:57:38,501 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2023-11-12 00:57:38,501 INFO L166 IcfgInterpreter]: Building call graph [2023-11-12 00:57:38,501 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-12 00:57:38,502 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-12 00:57:38,502 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-12 00:57:38,977 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-12 00:57:39,665 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1652#(and (= |ULTIMATE.start_dirname_#in~path#1.offset| 0) (<= 1 |#StackHeapBarrier|) (<= 2 |ULTIMATE.start_dirname_#in~path#1.base|) (<= 2 |ULTIMATE.start_dirname_~path#1.base|) (not (= (select |#valid| |ULTIMATE.start_dirname_~c~0#1.base|) 1)) (<= 2 |ULTIMATE.start_main_#t~malloc12#1.base|) (<= 2 |ULTIMATE.start_main_~in~0#1.base|) (= |ULTIMATE.start_main_~in~0#1.offset| 0) (= |ULTIMATE.start_strrchr_#res#1.offset| |ULTIMATE.start_dirname_~c~0#1.offset|) (<= |ULTIMATE.start_main_~in_len~0#1| 2147483647) (= |ULTIMATE.start_main_#t~malloc12#1.offset| 0) (= |ULTIMATE.start_dirname_~c~0#1.base| |ULTIMATE.start_strrchr_#res#1.base|) (= |ULTIMATE.start_dirname_~path#1.offset| 0) (or (not (= |ULTIMATE.start_dirname_~c~0#1.offset| 0)) (not (= |ULTIMATE.start_dirname_~c~0#1.base| 0))) (<= 1 |ULTIMATE.start_main_~in_len~0#1|))' at error location [2023-11-12 00:57:39,666 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-12 00:57:39,666 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-12 00:57:39,666 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 15 [2023-11-12 00:57:39,666 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [216558717] [2023-11-12 00:57:39,666 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-12 00:57:39,667 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-11-12 00:57:39,667 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:57:39,667 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-11-12 00:57:39,668 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=479, Unknown=0, NotChecked=0, Total=552 [2023-11-12 00:57:39,668 INFO L87 Difference]: Start difference. First operand 46 states and 55 transitions. Second operand has 16 states, 15 states have (on average 2.2666666666666666) internal successors, (34), 16 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 00:57:40,099 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:57:40,099 INFO L93 Difference]: Finished difference Result 58 states and 66 transitions. [2023-11-12 00:57:40,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-12 00:57:40,100 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 2.2666666666666666) internal successors, (34), 16 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2023-11-12 00:57:40,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:57:40,100 INFO L225 Difference]: With dead ends: 58 [2023-11-12 00:57:40,101 INFO L226 Difference]: Without dead ends: 58 [2023-11-12 00:57:40,101 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 31 SyntacticMatches, 3 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 243 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=185, Invalid=871, Unknown=0, NotChecked=0, Total=1056 [2023-11-12 00:57:40,102 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 154 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 158 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 154 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 165 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 158 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-12 00:57:40,102 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [154 Valid, 25 Invalid, 165 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 158 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-12 00:57:40,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2023-11-12 00:57:40,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 43. [2023-11-12 00:57:40,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 36 states have (on average 1.3611111111111112) internal successors, (49), 42 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 00:57:40,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 49 transitions. [2023-11-12 00:57:40,105 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 49 transitions. Word has length 16 [2023-11-12 00:57:40,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:57:40,105 INFO L495 AbstractCegarLoop]: Abstraction has 43 states and 49 transitions. [2023-11-12 00:57:40,105 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 2.2666666666666666) internal successors, (34), 16 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 00:57:40,106 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 49 transitions. [2023-11-12 00:57:40,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2023-11-12 00:57:40,106 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:57:40,106 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 00:57:40,118 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad4423dd-b636-4a99-8e68-b2d3170e9bfc/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-12 00:57:40,307 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad4423dd-b636-4a99-8e68-b2d3170e9bfc/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-11-12 00:57:40,307 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr17REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2023-11-12 00:57:40,307 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:57:40,308 INFO L85 PathProgramCache]: Analyzing trace with hash -350160193, now seen corresponding path program 1 times [2023-11-12 00:57:40,308 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:57:40,308 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2122229561] [2023-11-12 00:57:40,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:57:40,308 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:57:40,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:57:40,514 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 00:57:40,514 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:57:40,514 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2122229561] [2023-11-12 00:57:40,514 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2122229561] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 00:57:40,514 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [129165589] [2023-11-12 00:57:40,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:57:40,515 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:57:40,515 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad4423dd-b636-4a99-8e68-b2d3170e9bfc/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 00:57:40,516 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad4423dd-b636-4a99-8e68-b2d3170e9bfc/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 00:57:40,539 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad4423dd-b636-4a99-8e68-b2d3170e9bfc/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-12 00:57:40,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:57:40,590 INFO L262 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-12 00:57:40,592 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 00:57:40,628 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-12 00:57:40,629 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-12 00:57:40,629 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [129165589] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 00:57:40,629 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-12 00:57:40,629 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 8 [2023-11-12 00:57:40,630 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [122271945] [2023-11-12 00:57:40,630 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 00:57:40,630 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-12 00:57:40,630 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:57:40,631 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-12 00:57:40,631 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2023-11-12 00:57:40,632 INFO L87 Difference]: Start difference. First operand 43 states and 49 transitions. Second operand has 4 states, 3 states have (on average 5.333333333333333) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 00:57:40,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:57:40,712 INFO L93 Difference]: Finished difference Result 63 states and 72 transitions. [2023-11-12 00:57:40,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-12 00:57:40,713 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 5.333333333333333) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2023-11-12 00:57:40,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:57:40,714 INFO L225 Difference]: With dead ends: 63 [2023-11-12 00:57:40,714 INFO L226 Difference]: Without dead ends: 62 [2023-11-12 00:57:40,714 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2023-11-12 00:57:40,715 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 14 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 64 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 64 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 64 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-12 00:57:40,715 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 39 Invalid, 64 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 64 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-12 00:57:40,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2023-11-12 00:57:40,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 41. [2023-11-12 00:57:40,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 35 states have (on average 1.3142857142857143) internal successors, (46), 40 states have internal predecessors, (46), 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) [2023-11-12 00:57:40,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 46 transitions. [2023-11-12 00:57:40,718 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 46 transitions. Word has length 19 [2023-11-12 00:57:40,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:57:40,722 INFO L495 AbstractCegarLoop]: Abstraction has 41 states and 46 transitions. [2023-11-12 00:57:40,722 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 5.333333333333333) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 00:57:40,722 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 46 transitions. [2023-11-12 00:57:40,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2023-11-12 00:57:40,724 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:57:40,724 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 00:57:40,735 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad4423dd-b636-4a99-8e68-b2d3170e9bfc/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-12 00:57:40,930 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad4423dd-b636-4a99-8e68-b2d3170e9bfc/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-11-12 00:57:40,930 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2023-11-12 00:57:40,931 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:57:40,931 INFO L85 PathProgramCache]: Analyzing trace with hash 2029270819, now seen corresponding path program 1 times [2023-11-12 00:57:40,931 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:57:40,931 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1930923689] [2023-11-12 00:57:40,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:57:40,931 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:57:40,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:57:40,990 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-12 00:57:40,990 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:57:40,991 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1930923689] [2023-11-12 00:57:40,991 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1930923689] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 00:57:40,991 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 00:57:40,991 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-12 00:57:40,991 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [274992393] [2023-11-12 00:57:40,991 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 00:57:40,993 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-12 00:57:40,993 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:57:40,994 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-12 00:57:40,994 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-12 00:57:40,994 INFO L87 Difference]: Start difference. First operand 41 states and 46 transitions. Second operand has 4 states, 3 states have (on average 5.666666666666667) internal successors, (17), 4 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) [2023-11-12 00:57:41,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:57:41,057 INFO L93 Difference]: Finished difference Result 55 states and 62 transitions. [2023-11-12 00:57:41,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-12 00:57:41,058 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 5.666666666666667) internal successors, (17), 4 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 20 [2023-11-12 00:57:41,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:57:41,058 INFO L225 Difference]: With dead ends: 55 [2023-11-12 00:57:41,058 INFO L226 Difference]: Without dead ends: 55 [2023-11-12 00:57:41,059 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 [2023-11-12 00:57:41,059 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 18 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-12 00:57:41,060 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 34 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-12 00:57:41,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2023-11-12 00:57:41,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 40. [2023-11-12 00:57:41,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 35 states have (on average 1.2857142857142858) internal successors, (45), 39 states have internal predecessors, (45), 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) [2023-11-12 00:57:41,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 45 transitions. [2023-11-12 00:57:41,062 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 45 transitions. Word has length 20 [2023-11-12 00:57:41,062 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:57:41,062 INFO L495 AbstractCegarLoop]: Abstraction has 40 states and 45 transitions. [2023-11-12 00:57:41,062 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 5.666666666666667) internal successors, (17), 4 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) [2023-11-12 00:57:41,062 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 45 transitions. [2023-11-12 00:57:41,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2023-11-12 00:57:41,063 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:57:41,063 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 00:57:41,063 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-11-12 00:57:41,063 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2023-11-12 00:57:41,064 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:57:41,064 INFO L85 PathProgramCache]: Analyzing trace with hash 2029270820, now seen corresponding path program 1 times [2023-11-12 00:57:41,064 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:57:41,064 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [703858428] [2023-11-12 00:57:41,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:57:41,064 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:57:41,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:57:41,479 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 00:57:41,479 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:57:41,480 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [703858428] [2023-11-12 00:57:41,480 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [703858428] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 00:57:41,480 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1032071733] [2023-11-12 00:57:41,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:57:41,480 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:57:41,480 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad4423dd-b636-4a99-8e68-b2d3170e9bfc/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 00:57:41,481 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad4423dd-b636-4a99-8e68-b2d3170e9bfc/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 00:57:41,507 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad4423dd-b636-4a99-8e68-b2d3170e9bfc/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-12 00:57:41,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:57:41,587 INFO L262 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 13 conjunts are in the unsatisfiable core [2023-11-12 00:57:41,588 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 00:57:41,649 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-12 00:57:41,649 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-12 00:57:41,649 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1032071733] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 00:57:41,649 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-12 00:57:41,650 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [13] total 16 [2023-11-12 00:57:41,650 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1498035087] [2023-11-12 00:57:41,650 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 00:57:41,650 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-12 00:57:41,650 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:57:41,651 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-12 00:57:41,651 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2023-11-12 00:57:41,651 INFO L87 Difference]: Start difference. First operand 40 states and 45 transitions. Second operand has 5 states, 4 states have (on average 4.25) internal successors, (17), 5 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) [2023-11-12 00:57:41,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:57:41,711 INFO L93 Difference]: Finished difference Result 54 states and 61 transitions. [2023-11-12 00:57:41,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-12 00:57:41,712 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 4.25) internal successors, (17), 5 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 20 [2023-11-12 00:57:41,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:57:41,713 INFO L225 Difference]: With dead ends: 54 [2023-11-12 00:57:41,713 INFO L226 Difference]: Without dead ends: 54 [2023-11-12 00:57:41,713 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2023-11-12 00:57:41,714 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 23 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 60 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-12 00:57:41,714 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 35 Invalid, 60 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 57 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-12 00:57:41,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2023-11-12 00:57:41,718 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 39. [2023-11-12 00:57:41,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 35 states have (on average 1.2571428571428571) internal successors, (44), 38 states have internal predecessors, (44), 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) [2023-11-12 00:57:41,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 44 transitions. [2023-11-12 00:57:41,719 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 44 transitions. Word has length 20 [2023-11-12 00:57:41,719 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:57:41,719 INFO L495 AbstractCegarLoop]: Abstraction has 39 states and 44 transitions. [2023-11-12 00:57:41,720 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 4.25) internal successors, (17), 5 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) [2023-11-12 00:57:41,720 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 44 transitions. [2023-11-12 00:57:41,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2023-11-12 00:57:41,721 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:57:41,721 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 00:57:41,732 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad4423dd-b636-4a99-8e68-b2d3170e9bfc/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-12 00:57:41,926 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad4423dd-b636-4a99-8e68-b2d3170e9bfc/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-11-12 00:57:41,927 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2023-11-12 00:57:41,927 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:57:41,927 INFO L85 PathProgramCache]: Analyzing trace with hash -1517112458, now seen corresponding path program 1 times [2023-11-12 00:57:41,927 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:57:41,927 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1889843917] [2023-11-12 00:57:41,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:57:41,928 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:57:41,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:57:42,295 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 00:57:42,295 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:57:42,296 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1889843917] [2023-11-12 00:57:42,296 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1889843917] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 00:57:42,296 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [615959185] [2023-11-12 00:57:42,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:57:42,296 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:57:42,296 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad4423dd-b636-4a99-8e68-b2d3170e9bfc/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 00:57:42,297 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad4423dd-b636-4a99-8e68-b2d3170e9bfc/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 00:57:42,319 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad4423dd-b636-4a99-8e68-b2d3170e9bfc/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-12 00:57:42,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:57:42,379 INFO L262 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 57 conjunts are in the unsatisfiable core [2023-11-12 00:57:42,382 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 00:57:42,413 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 8 treesize of output 1 [2023-11-12 00:57:43,433 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-12 00:57:43,433 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 50 treesize of output 94 [2023-11-12 00:57:43,615 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 00:57:43,616 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 00:57:43,821 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 [2023-11-12 00:57:44,637 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 00:57:44,637 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [615959185] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 00:57:44,637 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1053460331] [2023-11-12 00:57:44,640 INFO L159 IcfgInterpreter]: Started Sifa with 17 locations of interest [2023-11-12 00:57:44,640 INFO L166 IcfgInterpreter]: Building call graph [2023-11-12 00:57:44,640 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-12 00:57:44,641 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-12 00:57:44,641 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-12 00:57:45,166 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-12 00:57:47,359 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2379#(and (= |ULTIMATE.start_dirname_#in~path#1.offset| 0) (<= 1 |#StackHeapBarrier|) (<= 0 (+ |ULTIMATE.start_strrchr_#res#1.offset| 1)) (<= 2 |ULTIMATE.start_dirname_#in~path#1.base|) (<= 2 |ULTIMATE.start_dirname_~path#1.base|) (<= 2 |ULTIMATE.start_main_#t~malloc12#1.base|) (<= 2 |ULTIMATE.start_main_~in~0#1.base|) (= |ULTIMATE.start_main_~in~0#1.offset| 0) (<= |ULTIMATE.start_main_~in_len~0#1| 2147483647) (<= 0 (+ |ULTIMATE.start_dirname_~c~0#1.offset| 1)) (= |ULTIMATE.start_main_#t~malloc12#1.offset| 0) (or (= (+ |ULTIMATE.start_dirname_~c~0#1.offset| 1) 0) (< (select |#length| |ULTIMATE.start_dirname_~c~0#1.base|) (+ |ULTIMATE.start_dirname_~c~0#1.offset| 1))) (= |ULTIMATE.start_dirname_~path#1.offset| 0) (<= 1 |ULTIMATE.start_main_~in_len~0#1|))' at error location [2023-11-12 00:57:47,359 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-12 00:57:47,359 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-12 00:57:47,359 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 16, 14] total 42 [2023-11-12 00:57:47,360 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [600563926] [2023-11-12 00:57:47,360 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-12 00:57:47,360 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2023-11-12 00:57:47,360 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:57:47,361 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2023-11-12 00:57:47,362 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=273, Invalid=2807, Unknown=0, NotChecked=0, Total=3080 [2023-11-12 00:57:47,363 INFO L87 Difference]: Start difference. First operand 39 states and 44 transitions. Second operand has 42 states, 42 states have (on average 1.4761904761904763) internal successors, (62), 42 states have internal predecessors, (62), 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)