./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/termination-15/cstrcmp_diffterm_alloca.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 4fc63b2a 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_935a2e62-e77a-4bd2-b536-9a2ed37740f7/bin/utaipan-verify-DbMuA5NWw2/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_935a2e62-e77a-4bd2-b536-9a2ed37740f7/bin/utaipan-verify-DbMuA5NWw2/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_935a2e62-e77a-4bd2-b536-9a2ed37740f7/bin/utaipan-verify-DbMuA5NWw2/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_935a2e62-e77a-4bd2-b536-9a2ed37740f7/bin/utaipan-verify-DbMuA5NWw2/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/termination-15/cstrcmp_diffterm_alloca.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_935a2e62-e77a-4bd2-b536-9a2ed37740f7/bin/utaipan-verify-DbMuA5NWw2/config/svcomp-DerefFreeMemtrack-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_935a2e62-e77a-4bd2-b536-9a2ed37740f7/bin/utaipan-verify-DbMuA5NWw2 --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 1e18bedecf24ed576ef48e748b4e5069642018f9f385da730f53731c063f81f6 --- Real Ultimate output --- This is Ultimate 0.2.5-dev-4fc63b2 [2024-11-02 12:33:22,768 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-02 12:33:22,869 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_935a2e62-e77a-4bd2-b536-9a2ed37740f7/bin/utaipan-verify-DbMuA5NWw2/config/svcomp-DerefFreeMemtrack-64bit-Taipan_Default.epf [2024-11-02 12:33:22,878 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-02 12:33:22,878 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-02 12:33:22,919 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-02 12:33:22,919 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-02 12:33:22,920 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-02 12:33:22,921 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-02 12:33:22,922 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-02 12:33:22,922 INFO L153 SettingsManager]: * User list type=DISABLED [2024-11-02 12:33:22,923 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2024-11-02 12:33:22,923 INFO L153 SettingsManager]: * Explicit value domain=true [2024-11-02 12:33:22,923 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2024-11-02 12:33:22,926 INFO L153 SettingsManager]: * Octagon Domain=false [2024-11-02 12:33:22,926 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2024-11-02 12:33:22,927 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2024-11-02 12:33:22,927 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2024-11-02 12:33:22,928 INFO L153 SettingsManager]: * Interval Domain=false [2024-11-02 12:33:22,928 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2024-11-02 12:33:22,928 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2024-11-02 12:33:22,929 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2024-11-02 12:33:22,929 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-02 12:33:22,930 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-02 12:33:22,930 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-02 12:33:22,931 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-02 12:33:22,931 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-02 12:33:22,931 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-11-02 12:33:22,932 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-11-02 12:33:22,936 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-11-02 12:33:22,936 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-02 12:33:22,937 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-11-02 12:33:22,937 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-02 12:33:22,937 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-11-02 12:33:22,937 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-02 12:33:22,938 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-02 12:33:22,938 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-02 12:33:22,938 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-02 12:33:22,938 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2024-11-02 12:33:22,939 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-02 12:33:22,939 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-02 12:33:22,940 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2024-11-02 12:33:22,941 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-02 12:33:22,941 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-02 12:33:22,941 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2024-11-02 12:33:22,942 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-02 12:33:22,942 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_935a2e62-e77a-4bd2-b536-9a2ed37740f7/bin/utaipan-verify-DbMuA5NWw2/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_935a2e62-e77a-4bd2-b536-9a2ed37740f7/bin/utaipan-verify-DbMuA5NWw2 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 1e18bedecf24ed576ef48e748b4e5069642018f9f385da730f53731c063f81f6 [2024-11-02 12:33:23,305 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-02 12:33:23,332 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-02 12:33:23,343 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-02 12:33:23,348 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-02 12:33:23,350 INFO L274 PluginConnector]: CDTParser initialized [2024-11-02 12:33:23,353 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_935a2e62-e77a-4bd2-b536-9a2ed37740f7/bin/utaipan-verify-DbMuA5NWw2/../../sv-benchmarks/c/termination-15/cstrcmp_diffterm_alloca.i Unable to find full path for "g++" [2024-11-02 12:33:25,353 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-02 12:33:25,641 INFO L384 CDTParser]: Found 1 translation units. [2024-11-02 12:33:25,641 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_935a2e62-e77a-4bd2-b536-9a2ed37740f7/sv-benchmarks/c/termination-15/cstrcmp_diffterm_alloca.i [2024-11-02 12:33:25,653 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_935a2e62-e77a-4bd2-b536-9a2ed37740f7/bin/utaipan-verify-DbMuA5NWw2/data/f2c3731a1/d860eb72ee924c6c9422bf737b37ca3f/FLAGe241e29f2 [2024-11-02 12:33:25,669 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_935a2e62-e77a-4bd2-b536-9a2ed37740f7/bin/utaipan-verify-DbMuA5NWw2/data/f2c3731a1/d860eb72ee924c6c9422bf737b37ca3f [2024-11-02 12:33:25,672 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-02 12:33:25,674 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-02 12:33:25,675 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-02 12:33:25,676 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-02 12:33:25,682 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-02 12:33:25,683 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 12:33:25" (1/1) ... [2024-11-02 12:33:25,684 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@19aa9c12 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:33:25, skipping insertion in model container [2024-11-02 12:33:25,684 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 12:33:25" (1/1) ... [2024-11-02 12:33:25,729 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-02 12:33:26,251 WARN L1053 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2024-11-02 12:33:26,252 WARN L1053 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2024-11-02 12:33:26,257 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-02 12:33:26,271 INFO L200 MainTranslator]: Completed pre-run [2024-11-02 12:33:26,354 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-02 12:33:26,412 INFO L204 MainTranslator]: Completed translation [2024-11-02 12:33:26,413 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:33:26 WrapperNode [2024-11-02 12:33:26,414 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-02 12:33:26,415 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-02 12:33:26,415 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-02 12:33:26,415 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-02 12:33:26,424 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:33:26" (1/1) ... [2024-11-02 12:33:26,437 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:33:26" (1/1) ... [2024-11-02 12:33:26,462 INFO L138 Inliner]: procedures = 152, calls = 16, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 72 [2024-11-02 12:33:26,462 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-02 12:33:26,463 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-02 12:33:26,463 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-02 12:33:26,463 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-02 12:33:26,476 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:33:26" (1/1) ... [2024-11-02 12:33:26,476 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:33:26" (1/1) ... [2024-11-02 12:33:26,481 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:33:26" (1/1) ... [2024-11-02 12:33:26,484 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:33:26" (1/1) ... [2024-11-02 12:33:26,491 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:33:26" (1/1) ... [2024-11-02 12:33:26,495 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:33:26" (1/1) ... [2024-11-02 12:33:26,497 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:33:26" (1/1) ... [2024-11-02 12:33:26,498 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:33:26" (1/1) ... [2024-11-02 12:33:26,501 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-02 12:33:26,502 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-02 12:33:26,502 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-02 12:33:26,503 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-02 12:33:26,504 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:33:26" (1/1) ... [2024-11-02 12:33:26,512 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2024-11-02 12:33:26,535 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_935a2e62-e77a-4bd2-b536-9a2ed37740f7/bin/utaipan-verify-DbMuA5NWw2/z3 [2024-11-02 12:33:26,553 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_935a2e62-e77a-4bd2-b536-9a2ed37740f7/bin/utaipan-verify-DbMuA5NWw2/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2024-11-02 12:33:26,558 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_935a2e62-e77a-4bd2-b536-9a2ed37740f7/bin/utaipan-verify-DbMuA5NWw2/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2024-11-02 12:33:26,602 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2024-11-02 12:33:26,603 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2024-11-02 12:33:26,603 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-11-02 12:33:26,603 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-11-02 12:33:26,604 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-02 12:33:26,604 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-02 12:33:26,729 INFO L238 CfgBuilder]: Building ICFG [2024-11-02 12:33:26,732 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-02 12:33:27,070 INFO L? ?]: Removed 50 outVars from TransFormulas that were not future-live. [2024-11-02 12:33:27,070 INFO L287 CfgBuilder]: Performing block encoding [2024-11-02 12:33:27,150 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-02 12:33:27,150 INFO L316 CfgBuilder]: Removed 1 assume(true) statements. [2024-11-02 12:33:27,151 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 12:33:27 BoogieIcfgContainer [2024-11-02 12:33:27,151 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-02 12:33:27,154 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-02 12:33:27,154 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-02 12:33:27,158 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-02 12:33:27,158 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.11 12:33:25" (1/3) ... [2024-11-02 12:33:27,159 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6cee8e8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.11 12:33:27, skipping insertion in model container [2024-11-02 12:33:27,160 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:33:26" (2/3) ... [2024-11-02 12:33:27,160 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6cee8e8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.11 12:33:27, skipping insertion in model container [2024-11-02 12:33:27,160 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 12:33:27" (3/3) ... [2024-11-02 12:33:27,162 INFO L112 eAbstractionObserver]: Analyzing ICFG cstrcmp_diffterm_alloca.i [2024-11-02 12:33:27,184 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-02 12:33:27,184 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 15 error locations. [2024-11-02 12:33:27,264 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-02 12:33:27,271 INFO L333 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, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=None, 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;@33b7105b, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-02 12:33:27,272 INFO L334 AbstractCegarLoop]: Starting to check reachability of 15 error locations. [2024-11-02 12:33:27,292 INFO L276 IsEmpty]: Start isEmpty. Operand has 27 states, 11 states have (on average 2.6363636363636362) internal successors, (29), 26 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-02 12:33:27,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2024-11-02 12:33:27,298 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 12:33:27,299 INFO L215 NwaCegarLoop]: trace histogram [1, 1] [2024-11-02 12:33:27,299 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2024-11-02 12:33:27,305 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 12:33:27,305 INFO L85 PathProgramCache]: Analyzing trace with hash 3396, now seen corresponding path program 1 times [2024-11-02 12:33:27,318 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-02 12:33:27,318 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1851123802] [2024-11-02 12:33:27,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 12:33:27,319 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-02 12:33:27,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 12:33:27,736 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-02 12:33:27,737 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-02 12:33:27,738 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1851123802] [2024-11-02 12:33:27,742 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1851123802] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-02 12:33:27,742 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-02 12:33:27,743 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-11-02 12:33:27,745 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [88639025] [2024-11-02 12:33:27,746 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-02 12:33:27,755 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-02 12:33:27,756 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-02 12:33:27,796 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-02 12:33:27,797 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-02 12:33:27,799 INFO L87 Difference]: Start difference. First operand has 27 states, 11 states have (on average 2.6363636363636362) internal successors, (29), 26 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-02 12:33:27,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-02 12:33:27,872 INFO L93 Difference]: Finished difference Result 26 states and 27 transitions. [2024-11-02 12:33:27,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-02 12:33:27,875 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 2 [2024-11-02 12:33:27,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-02 12:33:27,885 INFO L225 Difference]: With dead ends: 26 [2024-11-02 12:33:27,885 INFO L226 Difference]: Without dead ends: 25 [2024-11-02 12:33:27,887 INFO L431 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 [2024-11-02 12:33:27,892 INFO L432 NwaCegarLoop]: 17 mSDtfsCounter, 3 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-02 12:33:27,893 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 26 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-02 12:33:27,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2024-11-02 12:33:27,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2024-11-02 12:33:27,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 24 states have internal predecessors, (26), 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) [2024-11-02 12:33:27,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 26 transitions. [2024-11-02 12:33:27,937 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 26 transitions. Word has length 2 [2024-11-02 12:33:27,937 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-02 12:33:27,938 INFO L471 AbstractCegarLoop]: Abstraction has 25 states and 26 transitions. [2024-11-02 12:33:27,938 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-02 12:33:27,939 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 26 transitions. [2024-11-02 12:33:27,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2024-11-02 12:33:27,941 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 12:33:27,942 INFO L215 NwaCegarLoop]: trace histogram [1, 1] [2024-11-02 12:33:27,942 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-02 12:33:27,943 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2024-11-02 12:33:27,944 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 12:33:27,944 INFO L85 PathProgramCache]: Analyzing trace with hash 3397, now seen corresponding path program 1 times [2024-11-02 12:33:27,944 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-02 12:33:27,948 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [414843058] [2024-11-02 12:33:27,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 12:33:27,948 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-02 12:33:28,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 12:33:28,356 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-02 12:33:28,357 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-02 12:33:28,358 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [414843058] [2024-11-02 12:33:28,358 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [414843058] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-02 12:33:28,359 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-02 12:33:28,360 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-11-02 12:33:28,360 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1434861415] [2024-11-02 12:33:28,360 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-02 12:33:28,362 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-02 12:33:28,362 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-02 12:33:28,363 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-02 12:33:28,364 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-02 12:33:28,364 INFO L87 Difference]: Start difference. First operand 25 states and 26 transitions. Second operand has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-02 12:33:28,417 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-02 12:33:28,418 INFO L93 Difference]: Finished difference Result 24 states and 25 transitions. [2024-11-02 12:33:28,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-02 12:33:28,419 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 2 [2024-11-02 12:33:28,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-02 12:33:28,420 INFO L225 Difference]: With dead ends: 24 [2024-11-02 12:33:28,421 INFO L226 Difference]: Without dead ends: 24 [2024-11-02 12:33:28,421 INFO L431 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 [2024-11-02 12:33:28,423 INFO L432 NwaCegarLoop]: 18 mSDtfsCounter, 0 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 29 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 [2024-11-02 12:33:28,425 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 29 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-02 12:33:28,427 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2024-11-02 12:33:28,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2024-11-02 12:33:28,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 11 states have (on average 2.272727272727273) internal successors, (25), 23 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-02 12:33:28,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 25 transitions. [2024-11-02 12:33:28,434 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 25 transitions. Word has length 2 [2024-11-02 12:33:28,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-02 12:33:28,434 INFO L471 AbstractCegarLoop]: Abstraction has 24 states and 25 transitions. [2024-11-02 12:33:28,435 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-02 12:33:28,435 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 25 transitions. [2024-11-02 12:33:28,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2024-11-02 12:33:28,436 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 12:33:28,436 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1] [2024-11-02 12:33:28,436 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-02 12:33:28,437 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2024-11-02 12:33:28,439 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 12:33:28,439 INFO L85 PathProgramCache]: Analyzing trace with hash 105265, now seen corresponding path program 1 times [2024-11-02 12:33:28,439 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-02 12:33:28,440 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [65917449] [2024-11-02 12:33:28,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 12:33:28,441 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-02 12:33:28,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 12:33:28,534 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-02 12:33:28,534 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-02 12:33:28,535 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [65917449] [2024-11-02 12:33:28,535 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [65917449] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-02 12:33:28,535 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-02 12:33:28,536 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-11-02 12:33:28,536 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1907746215] [2024-11-02 12:33:28,537 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-02 12:33:28,537 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-02 12:33:28,538 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-02 12:33:28,539 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-02 12:33:28,539 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-02 12:33:28,540 INFO L87 Difference]: Start difference. First operand 24 states and 25 transitions. Second operand has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-02 12:33:28,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-02 12:33:28,609 INFO L93 Difference]: Finished difference Result 23 states and 24 transitions. [2024-11-02 12:33:28,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-02 12:33:28,612 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 [2024-11-02 12:33:28,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-02 12:33:28,612 INFO L225 Difference]: With dead ends: 23 [2024-11-02 12:33:28,613 INFO L226 Difference]: Without dead ends: 23 [2024-11-02 12:33:28,613 INFO L431 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 [2024-11-02 12:33:28,614 INFO L432 NwaCegarLoop]: 16 mSDtfsCounter, 0 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-02 12:33:28,615 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 25 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-02 12:33:28,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2024-11-02 12:33:28,618 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2024-11-02 12:33:28,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 22 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-02 12:33:28,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 24 transitions. [2024-11-02 12:33:28,620 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 24 transitions. Word has length 3 [2024-11-02 12:33:28,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-02 12:33:28,620 INFO L471 AbstractCegarLoop]: Abstraction has 23 states and 24 transitions. [2024-11-02 12:33:28,620 INFO L472 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) [2024-11-02 12:33:28,621 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 24 transitions. [2024-11-02 12:33:28,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2024-11-02 12:33:28,621 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 12:33:28,621 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1] [2024-11-02 12:33:28,622 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-11-02 12:33:28,622 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2024-11-02 12:33:28,623 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 12:33:28,623 INFO L85 PathProgramCache]: Analyzing trace with hash 105266, now seen corresponding path program 1 times [2024-11-02 12:33:28,623 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-02 12:33:28,624 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1963918993] [2024-11-02 12:33:28,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 12:33:28,624 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-02 12:33:28,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 12:33:28,827 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-02 12:33:28,828 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-02 12:33:28,828 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1963918993] [2024-11-02 12:33:28,828 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1963918993] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-02 12:33:28,828 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-02 12:33:28,828 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-11-02 12:33:28,829 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1247793625] [2024-11-02 12:33:28,829 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-02 12:33:28,829 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-02 12:33:28,829 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-02 12:33:28,830 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-02 12:33:28,830 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-02 12:33:28,831 INFO L87 Difference]: Start difference. First operand 23 states and 24 transitions. Second operand has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-02 12:33:28,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-02 12:33:28,885 INFO L93 Difference]: Finished difference Result 22 states and 23 transitions. [2024-11-02 12:33:28,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-02 12:33:28,886 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 [2024-11-02 12:33:28,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-02 12:33:28,887 INFO L225 Difference]: With dead ends: 22 [2024-11-02 12:33:28,887 INFO L226 Difference]: Without dead ends: 22 [2024-11-02 12:33:28,887 INFO L431 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 [2024-11-02 12:33:28,890 INFO L432 NwaCegarLoop]: 16 mSDtfsCounter, 0 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-02 12:33:28,891 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 26 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-02 12:33:28,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2024-11-02 12:33:28,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2024-11-02 12:33:28,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 11 states have (on average 2.090909090909091) internal successors, (23), 21 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-02 12:33:28,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 23 transitions. [2024-11-02 12:33:28,905 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 23 transitions. Word has length 3 [2024-11-02 12:33:28,905 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-02 12:33:28,906 INFO L471 AbstractCegarLoop]: Abstraction has 22 states and 23 transitions. [2024-11-02 12:33:28,906 INFO L472 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) [2024-11-02 12:33:28,907 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 23 transitions. [2024-11-02 12:33:28,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2024-11-02 12:33:28,907 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 12:33:28,907 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2024-11-02 12:33:28,908 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-11-02 12:33:28,908 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2024-11-02 12:33:28,909 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 12:33:28,909 INFO L85 PathProgramCache]: Analyzing trace with hash 3264669, now seen corresponding path program 1 times [2024-11-02 12:33:28,910 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-02 12:33:28,910 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2050885753] [2024-11-02 12:33:28,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 12:33:28,910 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-02 12:33:28,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 12:33:28,979 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-02 12:33:28,979 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-02 12:33:28,979 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2050885753] [2024-11-02 12:33:28,980 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2050885753] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-02 12:33:28,980 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-02 12:33:28,981 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-02 12:33:28,981 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1298954475] [2024-11-02 12:33:28,983 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-02 12:33:28,983 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-02 12:33:28,984 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-02 12:33:28,984 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-02 12:33:28,985 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-02 12:33:28,987 INFO L87 Difference]: Start difference. First operand 22 states and 23 transitions. Second operand has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 4 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-02 12:33:29,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-02 12:33:29,070 INFO L93 Difference]: Finished difference Result 19 states and 20 transitions. [2024-11-02 12:33:29,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-02 12:33:29,070 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 4 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 4 [2024-11-02 12:33:29,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-02 12:33:29,071 INFO L225 Difference]: With dead ends: 19 [2024-11-02 12:33:29,071 INFO L226 Difference]: Without dead ends: 19 [2024-11-02 12:33:29,072 INFO L431 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 [2024-11-02 12:33:29,074 INFO L432 NwaCegarLoop]: 7 mSDtfsCounter, 8 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 13 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-02 12:33:29,078 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 13 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-02 12:33:29,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2024-11-02 12:33:29,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2024-11-02 12:33:29,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 18 states have internal predecessors, (20), 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) [2024-11-02 12:33:29,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 20 transitions. [2024-11-02 12:33:29,097 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 20 transitions. Word has length 4 [2024-11-02 12:33:29,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-02 12:33:29,098 INFO L471 AbstractCegarLoop]: Abstraction has 19 states and 20 transitions. [2024-11-02 12:33:29,098 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 4 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-02 12:33:29,098 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 20 transitions. [2024-11-02 12:33:29,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2024-11-02 12:33:29,099 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 12:33:29,099 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2024-11-02 12:33:29,099 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-11-02 12:33:29,099 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2024-11-02 12:33:29,104 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 12:33:29,105 INFO L85 PathProgramCache]: Analyzing trace with hash 3264670, now seen corresponding path program 1 times [2024-11-02 12:33:29,105 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-02 12:33:29,106 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1596392310] [2024-11-02 12:33:29,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 12:33:29,106 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-02 12:33:29,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 12:33:29,228 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-02 12:33:29,228 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-02 12:33:29,228 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1596392310] [2024-11-02 12:33:29,228 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1596392310] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-02 12:33:29,228 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-02 12:33:29,229 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-02 12:33:29,229 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [50862874] [2024-11-02 12:33:29,229 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-02 12:33:29,229 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-02 12:33:29,229 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-02 12:33:29,230 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-02 12:33:29,230 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-02 12:33:29,230 INFO L87 Difference]: Start difference. First operand 19 states and 20 transitions. Second operand has 5 states, 4 states have (on average 1.0) internal successors, (4), 4 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-02 12:33:29,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-02 12:33:29,308 INFO L93 Difference]: Finished difference Result 27 states and 30 transitions. [2024-11-02 12:33:29,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-02 12:33:29,311 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 1.0) internal successors, (4), 4 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 4 [2024-11-02 12:33:29,311 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-02 12:33:29,311 INFO L225 Difference]: With dead ends: 27 [2024-11-02 12:33:29,311 INFO L226 Difference]: Without dead ends: 27 [2024-11-02 12:33:29,313 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-02 12:33:29,313 INFO L432 NwaCegarLoop]: 10 mSDtfsCounter, 8 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-02 12:33:29,314 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 32 Invalid, 46 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-02 12:33:29,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2024-11-02 12:33:29,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 25. [2024-11-02 12:33:29,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 24 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-02 12:33:29,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 30 transitions. [2024-11-02 12:33:29,319 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 30 transitions. Word has length 4 [2024-11-02 12:33:29,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-02 12:33:29,319 INFO L471 AbstractCegarLoop]: Abstraction has 25 states and 30 transitions. [2024-11-02 12:33:29,320 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 1.0) internal successors, (4), 4 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-02 12:33:29,320 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 30 transitions. [2024-11-02 12:33:29,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2024-11-02 12:33:29,320 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 12:33:29,320 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-11-02 12:33:29,321 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-11-02 12:33:29,321 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2024-11-02 12:33:29,321 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 12:33:29,321 INFO L85 PathProgramCache]: Analyzing trace with hash -1525179811, now seen corresponding path program 1 times [2024-11-02 12:33:29,322 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-02 12:33:29,322 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [681627982] [2024-11-02 12:33:29,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 12:33:29,322 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-02 12:33:29,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 12:33:29,373 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-02 12:33:29,373 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-02 12:33:29,374 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [681627982] [2024-11-02 12:33:29,374 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [681627982] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-02 12:33:29,374 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-02 12:33:29,374 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-02 12:33:29,374 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [302941209] [2024-11-02 12:33:29,374 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-02 12:33:29,375 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-02 12:33:29,375 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-02 12:33:29,375 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-02 12:33:29,375 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-02 12:33:29,376 INFO L87 Difference]: Start difference. First operand 25 states and 30 transitions. Second operand has 3 states, 2 states have (on average 3.5) internal successors, (7), 3 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) [2024-11-02 12:33:29,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-02 12:33:29,415 INFO L93 Difference]: Finished difference Result 23 states and 27 transitions. [2024-11-02 12:33:29,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-02 12:33:29,415 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 3 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 [2024-11-02 12:33:29,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-02 12:33:29,416 INFO L225 Difference]: With dead ends: 23 [2024-11-02 12:33:29,416 INFO L226 Difference]: Without dead ends: 23 [2024-11-02 12:33:29,416 INFO L431 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 [2024-11-02 12:33:29,417 INFO L432 NwaCegarLoop]: 8 mSDtfsCounter, 7 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 8 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-02 12:33:29,417 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 8 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-02 12:33:29,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2024-11-02 12:33:29,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2024-11-02 12:33:29,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 17 states have (on average 1.588235294117647) internal successors, (27), 22 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-02 12:33:29,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 27 transitions. [2024-11-02 12:33:29,424 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 27 transitions. Word has length 7 [2024-11-02 12:33:29,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-02 12:33:29,424 INFO L471 AbstractCegarLoop]: Abstraction has 23 states and 27 transitions. [2024-11-02 12:33:29,424 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 3 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) [2024-11-02 12:33:29,424 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 27 transitions. [2024-11-02 12:33:29,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2024-11-02 12:33:29,425 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 12:33:29,425 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-11-02 12:33:29,425 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-11-02 12:33:29,425 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2024-11-02 12:33:29,426 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 12:33:29,428 INFO L85 PathProgramCache]: Analyzing trace with hash -1525179810, now seen corresponding path program 1 times [2024-11-02 12:33:29,428 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-02 12:33:29,429 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [563339352] [2024-11-02 12:33:29,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 12:33:29,429 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-02 12:33:29,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 12:33:29,620 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-02 12:33:29,621 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-02 12:33:29,621 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [563339352] [2024-11-02 12:33:29,621 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [563339352] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-02 12:33:29,621 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-02 12:33:29,621 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-02 12:33:29,621 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1822380693] [2024-11-02 12:33:29,622 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-02 12:33:29,622 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-02 12:33:29,622 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-02 12:33:29,622 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-02 12:33:29,623 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-02 12:33:29,624 INFO L87 Difference]: Start difference. First operand 23 states and 27 transitions. Second operand has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 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) [2024-11-02 12:33:29,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-02 12:33:29,697 INFO L93 Difference]: Finished difference Result 27 states and 31 transitions. [2024-11-02 12:33:29,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-02 12:33:29,698 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 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 [2024-11-02 12:33:29,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-02 12:33:29,698 INFO L225 Difference]: With dead ends: 27 [2024-11-02 12:33:29,698 INFO L226 Difference]: Without dead ends: 27 [2024-11-02 12:33:29,699 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-02 12:33:29,699 INFO L432 NwaCegarLoop]: 10 mSDtfsCounter, 5 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-02 12:33:29,700 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 23 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-02 12:33:29,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2024-11-02 12:33:29,704 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 26. [2024-11-02 12:33:29,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 20 states have (on average 1.55) internal successors, (31), 25 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-02 12:33:29,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 31 transitions. [2024-11-02 12:33:29,706 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 31 transitions. Word has length 7 [2024-11-02 12:33:29,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-02 12:33:29,706 INFO L471 AbstractCegarLoop]: Abstraction has 26 states and 31 transitions. [2024-11-02 12:33:29,706 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 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) [2024-11-02 12:33:29,706 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 31 transitions. [2024-11-02 12:33:29,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2024-11-02 12:33:29,709 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 12:33:29,709 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-11-02 12:33:29,710 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-11-02 12:33:29,710 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2024-11-02 12:33:29,710 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 12:33:29,711 INFO L85 PathProgramCache]: Analyzing trace with hash -1525170737, now seen corresponding path program 1 times [2024-11-02 12:33:29,711 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-02 12:33:29,711 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [27201747] [2024-11-02 12:33:29,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 12:33:29,711 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-02 12:33:29,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 12:33:29,749 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-02 12:33:29,749 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-02 12:33:29,750 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [27201747] [2024-11-02 12:33:29,750 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [27201747] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-02 12:33:29,750 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-02 12:33:29,750 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-02 12:33:29,750 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [157963805] [2024-11-02 12:33:29,750 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-02 12:33:29,751 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-02 12:33:29,751 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-02 12:33:29,752 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-02 12:33:29,752 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-02 12:33:29,752 INFO L87 Difference]: Start difference. First operand 26 states and 31 transitions. Second operand has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 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) [2024-11-02 12:33:29,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-02 12:33:29,789 INFO L93 Difference]: Finished difference Result 27 states and 31 transitions. [2024-11-02 12:33:29,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-02 12:33:29,793 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 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 [2024-11-02 12:33:29,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-02 12:33:29,793 INFO L225 Difference]: With dead ends: 27 [2024-11-02 12:33:29,794 INFO L226 Difference]: Without dead ends: 27 [2024-11-02 12:33:29,794 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-02 12:33:29,795 INFO L432 NwaCegarLoop]: 11 mSDtfsCounter, 0 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-02 12:33:29,795 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 19 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-02 12:33:29,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2024-11-02 12:33:29,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2024-11-02 12:33:29,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 21 states have (on average 1.4761904761904763) internal successors, (31), 26 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-02 12:33:29,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 31 transitions. [2024-11-02 12:33:29,799 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 31 transitions. Word has length 7 [2024-11-02 12:33:29,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-02 12:33:29,799 INFO L471 AbstractCegarLoop]: Abstraction has 27 states and 31 transitions. [2024-11-02 12:33:29,799 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 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) [2024-11-02 12:33:29,800 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 31 transitions. [2024-11-02 12:33:29,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2024-11-02 12:33:29,800 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 12:33:29,800 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-02 12:33:29,800 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-11-02 12:33:29,803 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2024-11-02 12:33:29,804 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 12:33:29,804 INFO L85 PathProgramCache]: Analyzing trace with hash -1113916244, now seen corresponding path program 1 times [2024-11-02 12:33:29,804 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-02 12:33:29,804 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1063780782] [2024-11-02 12:33:29,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 12:33:29,805 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-02 12:33:29,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 12:33:30,317 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-02 12:33:30,317 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-02 12:33:30,317 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1063780782] [2024-11-02 12:33:30,317 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1063780782] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-02 12:33:30,318 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1080230058] [2024-11-02 12:33:30,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 12:33:30,318 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-02 12:33:30,330 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_935a2e62-e77a-4bd2-b536-9a2ed37740f7/bin/utaipan-verify-DbMuA5NWw2/z3 [2024-11-02 12:33:30,334 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_935a2e62-e77a-4bd2-b536-9a2ed37740f7/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-02 12:33:30,338 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_935a2e62-e77a-4bd2-b536-9a2ed37740f7/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-02 12:33:30,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 12:33:30,441 INFO L255 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 27 conjuncts are in the unsatisfiable core [2024-11-02 12:33:30,448 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-02 12:33:30,530 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2024-11-02 12:33:30,583 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2024-11-02 12:33:30,680 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 14 [2024-11-02 12:33:30,809 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-02 12:33:30,809 INFO L378 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 32 treesize of output 25 [2024-11-02 12:33:30,970 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-02 12:33:30,971 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-02 12:33:31,259 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-02 12:33:31,259 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 22 [2024-11-02 12:33:31,277 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-02 12:33:31,277 INFO L378 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 33 treesize of output 30 [2024-11-02 12:33:31,287 INFO L378 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 9 treesize of output 7 [2024-11-02 12:33:31,295 INFO L378 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 [2024-11-02 12:33:31,340 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-02 12:33:31,341 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1080230058] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-02 12:33:31,341 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1379833388] [2024-11-02 12:33:31,362 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2024-11-02 12:33:31,362 INFO L166 IcfgInterpreter]: Building call graph [2024-11-02 12:33:31,367 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-02 12:33:31,373 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-02 12:33:31,373 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-02 12:33:32,527 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-02 12:33:34,251 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '560#(exists ((|v_ULTIMATE.start_cstrcmp_~s1#1.offset_30| Int) (|v_ULTIMATE.start_cstrcmp_~s1#1.base_33| Int)) (and (<= 1 |#StackHeapBarrier|) (<= 2 |ULTIMATE.start_main_#t~malloc216#1.base|) (<= 1 |ULTIMATE.start_cstrcmp_~s2#1.offset|) (<= 2 |v_ULTIMATE.start_cstrcmp_~s1#1.base_33|) (<= 1 |v_ULTIMATE.start_cstrcmp_~s1#1.offset_30|) (<= (select |#length| |v_ULTIMATE.start_cstrcmp_~s1#1.base_33|) |v_ULTIMATE.start_cstrcmp_~s1#1.offset_30|) (<= 2 |ULTIMATE.start_cstrcmp_~s2#1.base|) (<= 2 |ULTIMATE.start_main_#t~malloc215#1.base|)))' at error location [2024-11-02 12:33:34,252 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-02 12:33:34,252 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-02 12:33:34,252 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 17 [2024-11-02 12:33:34,252 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [653366745] [2024-11-02 12:33:34,253 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-02 12:33:34,253 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-11-02 12:33:34,254 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-02 12:33:34,254 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-11-02 12:33:34,258 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=518, Unknown=1, NotChecked=0, Total=600 [2024-11-02 12:33:34,258 INFO L87 Difference]: Start difference. First operand 27 states and 31 transitions. Second operand has 19 states, 18 states have (on average 1.4444444444444444) internal successors, (26), 18 states have internal predecessors, (26), 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) [2024-11-02 12:33:34,858 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-02 12:33:34,858 INFO L93 Difference]: Finished difference Result 35 states and 40 transitions. [2024-11-02 12:33:34,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-11-02 12:33:34,859 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 1.4444444444444444) internal successors, (26), 18 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2024-11-02 12:33:34,859 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-02 12:33:34,861 INFO L225 Difference]: With dead ends: 35 [2024-11-02 12:33:34,861 INFO L226 Difference]: Without dead ends: 35 [2024-11-02 12:33:34,861 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=130, Invalid=799, Unknown=1, NotChecked=0, Total=930 [2024-11-02 12:33:34,863 INFO L432 NwaCegarLoop]: 6 mSDtfsCounter, 38 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 211 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 220 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 211 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-02 12:33:34,865 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [38 Valid, 41 Invalid, 220 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 211 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-02 12:33:34,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2024-11-02 12:33:34,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 25. [2024-11-02 12:33:34,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 21 states have (on average 1.3333333333333333) internal successors, (28), 24 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) [2024-11-02 12:33:34,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 28 transitions. [2024-11-02 12:33:34,871 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 28 transitions. Word has length 9 [2024-11-02 12:33:34,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-02 12:33:34,872 INFO L471 AbstractCegarLoop]: Abstraction has 25 states and 28 transitions. [2024-11-02 12:33:34,872 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 1.4444444444444444) internal successors, (26), 18 states have internal predecessors, (26), 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) [2024-11-02 12:33:34,872 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 28 transitions. [2024-11-02 12:33:34,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2024-11-02 12:33:34,875 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 12:33:34,875 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-02 12:33:34,902 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_935a2e62-e77a-4bd2-b536-9a2ed37740f7/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-11-02 12:33:35,079 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_935a2e62-e77a-4bd2-b536-9a2ed37740f7/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2024-11-02 12:33:35,080 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2024-11-02 12:33:35,080 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 12:33:35,080 INFO L85 PathProgramCache]: Analyzing trace with hash -1105248176, now seen corresponding path program 1 times [2024-11-02 12:33:35,080 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-02 12:33:35,081 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [27481129] [2024-11-02 12:33:35,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 12:33:35,081 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-02 12:33:35,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 12:33:35,266 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-02 12:33:35,266 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-02 12:33:35,266 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [27481129] [2024-11-02 12:33:35,266 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [27481129] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-02 12:33:35,266 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-02 12:33:35,267 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-02 12:33:35,267 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2111093781] [2024-11-02 12:33:35,267 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-02 12:33:35,267 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-02 12:33:35,267 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-02 12:33:35,268 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-02 12:33:35,268 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-02 12:33:35,269 INFO L87 Difference]: Start difference. First operand 25 states and 28 transitions. Second operand has 4 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-02 12:33:35,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-02 12:33:35,300 INFO L93 Difference]: Finished difference Result 24 states and 27 transitions. [2024-11-02 12:33:35,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-02 12:33:35,304 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2024-11-02 12:33:35,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-02 12:33:35,305 INFO L225 Difference]: With dead ends: 24 [2024-11-02 12:33:35,305 INFO L226 Difference]: Without dead ends: 20 [2024-11-02 12:33:35,306 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-02 12:33:35,306 INFO L432 NwaCegarLoop]: 7 mSDtfsCounter, 7 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 14 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-02 12:33:35,307 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 14 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-02 12:33:35,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2024-11-02 12:33:35,309 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2024-11-02 12:33:35,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 17 states have (on average 1.1764705882352942) internal successors, (20), 19 states have internal predecessors, (20), 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) [2024-11-02 12:33:35,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 20 transitions. [2024-11-02 12:33:35,310 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 20 transitions. Word has length 9 [2024-11-02 12:33:35,310 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-02 12:33:35,310 INFO L471 AbstractCegarLoop]: Abstraction has 20 states and 20 transitions. [2024-11-02 12:33:35,311 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-02 12:33:35,311 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 20 transitions. [2024-11-02 12:33:35,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2024-11-02 12:33:35,311 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 12:33:35,311 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1] [2024-11-02 12:33:35,312 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-11-02 12:33:35,312 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2024-11-02 12:33:35,312 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 12:33:35,312 INFO L85 PathProgramCache]: Analyzing trace with hash -1760212080, now seen corresponding path program 1 times [2024-11-02 12:33:35,313 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-02 12:33:35,313 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [194269862] [2024-11-02 12:33:35,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 12:33:35,313 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-02 12:33:35,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 12:33:35,797 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-02 12:33:35,797 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-02 12:33:35,797 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [194269862] [2024-11-02 12:33:35,797 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [194269862] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-02 12:33:35,797 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1576312163] [2024-11-02 12:33:35,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 12:33:35,798 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-02 12:33:35,798 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_935a2e62-e77a-4bd2-b536-9a2ed37740f7/bin/utaipan-verify-DbMuA5NWw2/z3 [2024-11-02 12:33:35,801 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_935a2e62-e77a-4bd2-b536-9a2ed37740f7/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-02 12:33:35,802 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_935a2e62-e77a-4bd2-b536-9a2ed37740f7/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-02 12:33:35,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 12:33:35,884 INFO L255 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 24 conjuncts are in the unsatisfiable core [2024-11-02 12:33:35,887 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-02 12:33:35,922 INFO L378 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 [2024-11-02 12:33:36,254 INFO L349 Elim1Store]: treesize reduction 3, result has 91.9 percent of original size [2024-11-02 12:33:36,254 INFO L378 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 48 treesize of output 54 [2024-11-02 12:33:36,392 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-02 12:33:36,393 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-02 12:33:36,731 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-02 12:33:36,731 INFO L378 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 91 treesize of output 91 [2024-11-02 12:33:36,753 INFO L378 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 [2024-11-02 12:33:36,772 INFO L378 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 24 treesize of output 22 [2024-11-02 12:33:36,813 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-02 12:33:36,813 INFO L378 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 37 treesize of output 37 [2024-11-02 12:33:36,847 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-02 12:33:36,848 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1576312163] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-02 12:33:36,848 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [838837416] [2024-11-02 12:33:36,851 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2024-11-02 12:33:36,851 INFO L166 IcfgInterpreter]: Building call graph [2024-11-02 12:33:36,851 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-02 12:33:36,852 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-02 12:33:36,852 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-02 12:33:37,571 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-02 12:33:39,257 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '773#(exists ((|v_ULTIMATE.start_cstrcmp_~s2#1.offset_31| Int) (|v_ULTIMATE.start_cstrcmp_~s2#1.base_33| Int)) (and (<= 1 |#StackHeapBarrier|) (<= 0 |ULTIMATE.start_cstrcmp_~s1#1.offset|) (= |ULTIMATE.start_cstrcmp_#t~mem206#1| (select (select |#memory_int| |ULTIMATE.start_cstrcmp_~s1#1.base|) |ULTIMATE.start_cstrcmp_~s1#1.offset|)) (<= 2 |v_ULTIMATE.start_cstrcmp_~s2#1.base_33|) (<= 2 |ULTIMATE.start_main_#t~malloc216#1.base|) (<= (select |#length| |v_ULTIMATE.start_cstrcmp_~s2#1.base_33|) |v_ULTIMATE.start_cstrcmp_~s2#1.offset_31|) (<= 0 |v_ULTIMATE.start_cstrcmp_~s2#1.offset_31|) (<= 2 |ULTIMATE.start_cstrcmp_~s1#1.base|) (<= (+ |ULTIMATE.start_cstrcmp_~s1#1.offset| 1) (select |#length| |ULTIMATE.start_cstrcmp_~s1#1.base|)) (= (select |#valid| |ULTIMATE.start_cstrcmp_~s1#1.base|) 1) (<= 2 |ULTIMATE.start_main_#t~malloc215#1.base|)))' at error location [2024-11-02 12:33:39,258 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-02 12:33:39,258 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-02 12:33:39,258 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 19 [2024-11-02 12:33:39,258 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1430791410] [2024-11-02 12:33:39,258 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-02 12:33:39,259 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-11-02 12:33:39,259 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-02 12:33:39,260 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-11-02 12:33:39,260 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=617, Unknown=1, NotChecked=0, Total=702 [2024-11-02 12:33:39,260 INFO L87 Difference]: Start difference. First operand 20 states and 20 transitions. Second operand has 21 states, 20 states have (on average 1.5) internal successors, (30), 20 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-02 12:33:39,946 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-02 12:33:39,946 INFO L93 Difference]: Finished difference Result 27 states and 27 transitions. [2024-11-02 12:33:39,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-11-02 12:33:39,947 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 1.5) internal successors, (30), 20 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2024-11-02 12:33:39,947 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-02 12:33:39,948 INFO L225 Difference]: With dead ends: 27 [2024-11-02 12:33:39,948 INFO L226 Difference]: Without dead ends: 24 [2024-11-02 12:33:39,949 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 193 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=157, Invalid=964, Unknown=1, NotChecked=0, Total=1122 [2024-11-02 12:33:39,949 INFO L432 NwaCegarLoop]: 5 mSDtfsCounter, 17 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 203 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 209 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 203 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-02 12:33:39,950 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 24 Invalid, 209 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 203 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-02 12:33:39,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2024-11-02 12:33:39,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 23. [2024-11-02 12:33:39,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 20 states have (on average 1.15) internal successors, (23), 22 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-02 12:33:39,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 23 transitions. [2024-11-02 12:33:39,953 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 23 transitions. Word has length 12 [2024-11-02 12:33:39,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-02 12:33:39,953 INFO L471 AbstractCegarLoop]: Abstraction has 23 states and 23 transitions. [2024-11-02 12:33:39,953 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 20 states have (on average 1.5) internal successors, (30), 20 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-02 12:33:39,953 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 23 transitions. [2024-11-02 12:33:39,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2024-11-02 12:33:39,954 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 12:33:39,954 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1] [2024-11-02 12:33:39,980 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_935a2e62-e77a-4bd2-b536-9a2ed37740f7/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-11-02 12:33:40,158 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_935a2e62-e77a-4bd2-b536-9a2ed37740f7/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2024-11-02 12:33:40,159 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2024-11-02 12:33:40,159 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 12:33:40,159 INFO L85 PathProgramCache]: Analyzing trace with hash 653338974, now seen corresponding path program 2 times [2024-11-02 12:33:40,159 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-02 12:33:40,159 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1521061602] [2024-11-02 12:33:40,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 12:33:40,160 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-02 12:33:40,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 12:33:40,720 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-02 12:33:40,721 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-02 12:33:40,721 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1521061602] [2024-11-02 12:33:40,721 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1521061602] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-02 12:33:40,721 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1298946180] [2024-11-02 12:33:40,722 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-02 12:33:40,722 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-02 12:33:40,722 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_935a2e62-e77a-4bd2-b536-9a2ed37740f7/bin/utaipan-verify-DbMuA5NWw2/z3 [2024-11-02 12:33:40,725 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_935a2e62-e77a-4bd2-b536-9a2ed37740f7/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-02 12:33:40,726 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_935a2e62-e77a-4bd2-b536-9a2ed37740f7/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-02 12:33:40,823 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-11-02 12:33:40,823 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-02 12:33:40,824 INFO L255 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 32 conjuncts are in the unsatisfiable core [2024-11-02 12:33:40,827 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-02 12:33:40,838 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2024-11-02 12:33:40,890 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2024-11-02 12:33:40,960 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 14 [2024-11-02 12:33:43,543 INFO L349 Elim1Store]: treesize reduction 4, result has 87.9 percent of original size [2024-11-02 12:33:43,543 INFO L378 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 40 treesize of output 49 [2024-11-02 12:33:43,897 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-02 12:33:43,897 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-02 12:33:44,622 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-02 12:33:44,623 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 43 treesize of output 32 [2024-11-02 12:33:44,668 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-02 12:33:44,668 INFO L378 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 54 treesize of output 71 [2024-11-02 12:33:44,694 INFO L378 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 [2024-11-02 12:33:44,718 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-02 12:33:44,719 INFO L378 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 19 treesize of output 23 [2024-11-02 12:33:44,908 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-02 12:33:44,908 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1298946180] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-02 12:33:44,909 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1969486621] [2024-11-02 12:33:44,911 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2024-11-02 12:33:44,911 INFO L166 IcfgInterpreter]: Building call graph [2024-11-02 12:33:44,912 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-02 12:33:44,912 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-02 12:33:44,912 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-02 12:33:45,550 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-02 12:33:47,067 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '950#(exists ((|v_ULTIMATE.start_cstrcmp_~s1#1.base_47| Int) (|v_ULTIMATE.start_cstrcmp_~s1#1.offset_44| Int)) (and (<= 1 |#StackHeapBarrier|) (<= 2 |ULTIMATE.start_main_#t~malloc216#1.base|) (<= 1 |ULTIMATE.start_cstrcmp_~s2#1.offset|) (<= 2 |v_ULTIMATE.start_cstrcmp_~s1#1.base_47|) (<= 2 |ULTIMATE.start_cstrcmp_~s2#1.base|) (<= 1 |v_ULTIMATE.start_cstrcmp_~s1#1.offset_44|) (<= 2 |ULTIMATE.start_main_#t~malloc215#1.base|) (<= (select |#length| |v_ULTIMATE.start_cstrcmp_~s1#1.base_47|) |v_ULTIMATE.start_cstrcmp_~s1#1.offset_44|)))' at error location [2024-11-02 12:33:47,067 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-02 12:33:47,067 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-02 12:33:47,067 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 10, 10] total 27 [2024-11-02 12:33:47,067 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1629665901] [2024-11-02 12:33:47,068 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-02 12:33:47,068 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2024-11-02 12:33:47,068 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-02 12:33:47,069 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2024-11-02 12:33:47,069 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=137, Invalid=1051, Unknown=2, NotChecked=0, Total=1190 [2024-11-02 12:33:47,070 INFO L87 Difference]: Start difference. First operand 23 states and 23 transitions. Second operand has 29 states, 28 states have (on average 1.5) internal successors, (42), 28 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) [2024-11-02 12:33:48,451 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-02 12:33:48,451 INFO L93 Difference]: Finished difference Result 40 states and 42 transitions. [2024-11-02 12:33:48,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2024-11-02 12:33:48,452 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 28 states have (on average 1.5) internal successors, (42), 28 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 14 [2024-11-02 12:33:48,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-02 12:33:48,453 INFO L225 Difference]: With dead ends: 40 [2024-11-02 12:33:48,453 INFO L226 Difference]: Without dead ends: 40 [2024-11-02 12:33:48,454 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 499 ImplicationChecksByTransitivity, 5.6s TimeCoverageRelationStatistics Valid=279, Invalid=1975, Unknown=2, NotChecked=0, Total=2256 [2024-11-02 12:33:48,455 INFO L432 NwaCegarLoop]: 2 mSDtfsCounter, 44 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 378 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 14 SdHoareTripleChecker+Invalid, 388 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 378 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-02 12:33:48,455 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [44 Valid, 14 Invalid, 388 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 378 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-11-02 12:33:48,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2024-11-02 12:33:48,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 30. [2024-11-02 12:33:48,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 27 states have (on average 1.1851851851851851) internal successors, (32), 29 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-02 12:33:48,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 32 transitions. [2024-11-02 12:33:48,458 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 32 transitions. Word has length 14 [2024-11-02 12:33:48,459 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-02 12:33:48,459 INFO L471 AbstractCegarLoop]: Abstraction has 30 states and 32 transitions. [2024-11-02 12:33:48,459 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 28 states have (on average 1.5) internal successors, (42), 28 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) [2024-11-02 12:33:48,459 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 32 transitions. [2024-11-02 12:33:48,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2024-11-02 12:33:48,460 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 12:33:48,460 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 1, 1, 1, 1] [2024-11-02 12:33:48,482 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_935a2e62-e77a-4bd2-b536-9a2ed37740f7/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-11-02 12:33:48,660 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_935a2e62-e77a-4bd2-b536-9a2ed37740f7/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2024-11-02 12:33:48,661 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2024-11-02 12:33:48,661 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 12:33:48,661 INFO L85 PathProgramCache]: Analyzing trace with hash -1169127010, now seen corresponding path program 2 times [2024-11-02 12:33:48,661 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-02 12:33:48,662 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [412366033] [2024-11-02 12:33:48,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 12:33:48,662 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-02 12:33:48,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 12:33:49,415 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-02 12:33:49,416 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-02 12:33:49,416 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [412366033] [2024-11-02 12:33:49,416 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [412366033] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-02 12:33:49,416 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1882221939] [2024-11-02 12:33:49,416 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-02 12:33:49,417 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-02 12:33:49,417 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_935a2e62-e77a-4bd2-b536-9a2ed37740f7/bin/utaipan-verify-DbMuA5NWw2/z3 [2024-11-02 12:33:49,419 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_935a2e62-e77a-4bd2-b536-9a2ed37740f7/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-02 12:33:49,424 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_935a2e62-e77a-4bd2-b536-9a2ed37740f7/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-02 12:33:49,548 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-11-02 12:33:49,548 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-02 12:33:49,550 INFO L255 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 33 conjuncts are in the unsatisfiable core [2024-11-02 12:33:49,555 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-02 12:33:49,592 INFO L378 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 [2024-11-02 12:33:54,854 INFO L349 Elim1Store]: treesize reduction 22, result has 82.4 percent of original size [2024-11-02 12:33:54,855 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 67 treesize of output 130