./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/loop-industry-pattern/aiob_4.c.v+cfa-reducer.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 4fc63b2a Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_106a9c1e-5bc4-4d37-8c7b-0ed15d07127a/bin/utaipan-verify-DbMuA5NWw2/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_106a9c1e-5bc4-4d37-8c7b-0ed15d07127a/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_106a9c1e-5bc4-4d37-8c7b-0ed15d07127a/bin/utaipan-verify-DbMuA5NWw2/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_106a9c1e-5bc4-4d37-8c7b-0ed15d07127a/bin/utaipan-verify-DbMuA5NWw2/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/loop-industry-pattern/aiob_4.c.v+cfa-reducer.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_106a9c1e-5bc4-4d37-8c7b-0ed15d07127a/bin/utaipan-verify-DbMuA5NWw2/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_106a9c1e-5bc4-4d37-8c7b-0ed15d07127a/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 32bit --witnessprinter.graph.data.programhash 7d18364cf74a7e83a7d0637d6dc5303d99591a287435332871b1650f13e39eb3 --- Real Ultimate output --- This is Ultimate 0.2.5-dev-4fc63b2 [2024-11-02 12:25:27,758 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-02 12:25:27,871 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_106a9c1e-5bc4-4d37-8c7b-0ed15d07127a/bin/utaipan-verify-DbMuA5NWw2/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2024-11-02 12:25:27,879 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-02 12:25:27,880 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-02 12:25:27,923 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-02 12:25:27,924 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-02 12:25:27,925 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-02 12:25:27,926 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-02 12:25:27,926 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-02 12:25:27,927 INFO L153 SettingsManager]: * User list type=DISABLED [2024-11-02 12:25:27,928 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2024-11-02 12:25:27,929 INFO L153 SettingsManager]: * Explicit value domain=true [2024-11-02 12:25:27,934 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2024-11-02 12:25:27,934 INFO L153 SettingsManager]: * Octagon Domain=false [2024-11-02 12:25:27,935 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2024-11-02 12:25:27,935 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2024-11-02 12:25:27,935 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2024-11-02 12:25:27,936 INFO L153 SettingsManager]: * Interval Domain=false [2024-11-02 12:25:27,936 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2024-11-02 12:25:27,937 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2024-11-02 12:25:27,940 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2024-11-02 12:25:27,941 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-02 12:25:27,941 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-02 12:25:27,942 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-02 12:25:27,942 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-02 12:25:27,942 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-02 12:25:27,943 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-02 12:25:27,943 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-02 12:25:27,944 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-11-02 12:25:27,944 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-11-02 12:25:27,944 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-11-02 12:25:27,945 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-02 12:25:27,945 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-11-02 12:25:27,945 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-02 12:25:27,946 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-11-02 12:25:27,947 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-02 12:25:27,948 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-02 12:25:27,948 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-02 12:25:27,949 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-02 12:25:27,949 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-02 12:25:27,949 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2024-11-02 12:25:27,950 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-02 12:25:27,950 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-02 12:25:27,951 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2024-11-02 12:25:27,951 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-02 12:25:27,952 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-02 12:25:27,952 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2024-11-02 12:25:27,952 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-02 12:25:27,952 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_106a9c1e-5bc4-4d37-8c7b-0ed15d07127a/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_106a9c1e-5bc4-4d37-8c7b-0ed15d07127a/bin/utaipan-verify-DbMuA5NWw2 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 7d18364cf74a7e83a7d0637d6dc5303d99591a287435332871b1650f13e39eb3 [2024-11-02 12:25:28,246 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-02 12:25:28,275 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-02 12:25:28,278 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-02 12:25:28,280 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-02 12:25:28,280 INFO L274 PluginConnector]: CDTParser initialized [2024-11-02 12:25:28,281 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_106a9c1e-5bc4-4d37-8c7b-0ed15d07127a/bin/utaipan-verify-DbMuA5NWw2/../../sv-benchmarks/c/loop-industry-pattern/aiob_4.c.v+cfa-reducer.c Unable to find full path for "g++" [2024-11-02 12:25:30,523 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-02 12:25:30,783 INFO L384 CDTParser]: Found 1 translation units. [2024-11-02 12:25:30,785 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_106a9c1e-5bc4-4d37-8c7b-0ed15d07127a/sv-benchmarks/c/loop-industry-pattern/aiob_4.c.v+cfa-reducer.c [2024-11-02 12:25:30,800 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_106a9c1e-5bc4-4d37-8c7b-0ed15d07127a/bin/utaipan-verify-DbMuA5NWw2/data/0f735da9f/5879301418af4a7b93733cd2c806ddad/FLAGcf0e4cfc1 [2024-11-02 12:25:30,823 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_106a9c1e-5bc4-4d37-8c7b-0ed15d07127a/bin/utaipan-verify-DbMuA5NWw2/data/0f735da9f/5879301418af4a7b93733cd2c806ddad [2024-11-02 12:25:30,828 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-02 12:25:30,830 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-02 12:25:30,831 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-02 12:25:30,832 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-02 12:25:30,842 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-02 12:25:30,843 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 12:25:30" (1/1) ... [2024-11-02 12:25:30,845 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7e213dad and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:25:30, skipping insertion in model container [2024-11-02 12:25:30,845 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 12:25:30" (1/1) ... [2024-11-02 12:25:30,888 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-02 12:25:31,292 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-02 12:25:31,304 INFO L200 MainTranslator]: Completed pre-run [2024-11-02 12:25:31,391 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-02 12:25:31,419 INFO L204 MainTranslator]: Completed translation [2024-11-02 12:25:31,420 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:25:31 WrapperNode [2024-11-02 12:25:31,420 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-02 12:25:31,421 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-02 12:25:31,422 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-02 12:25:31,422 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-02 12:25:31,430 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:25:31" (1/1) ... [2024-11-02 12:25:31,447 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:25:31" (1/1) ... [2024-11-02 12:25:31,490 INFO L138 Inliner]: procedures = 18, calls = 199, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 402 [2024-11-02 12:25:31,490 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-02 12:25:31,491 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-02 12:25:31,491 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-02 12:25:31,492 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-02 12:25:31,502 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:25:31" (1/1) ... [2024-11-02 12:25:31,502 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:25:31" (1/1) ... [2024-11-02 12:25:31,509 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:25:31" (1/1) ... [2024-11-02 12:25:31,509 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:25:31" (1/1) ... [2024-11-02 12:25:31,529 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:25:31" (1/1) ... [2024-11-02 12:25:31,531 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:25:31" (1/1) ... [2024-11-02 12:25:31,534 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:25:31" (1/1) ... [2024-11-02 12:25:31,536 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:25:31" (1/1) ... [2024-11-02 12:25:31,541 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-02 12:25:31,542 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-02 12:25:31,543 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-02 12:25:31,543 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-02 12:25:31,544 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:25:31" (1/1) ... [2024-11-02 12:25:31,550 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2024-11-02 12:25:31,565 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_106a9c1e-5bc4-4d37-8c7b-0ed15d07127a/bin/utaipan-verify-DbMuA5NWw2/z3 [2024-11-02 12:25:31,581 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_106a9c1e-5bc4-4d37-8c7b-0ed15d07127a/bin/utaipan-verify-DbMuA5NWw2/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2024-11-02 12:25:31,587 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_106a9c1e-5bc4-4d37-8c7b-0ed15d07127a/bin/utaipan-verify-DbMuA5NWw2/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2024-11-02 12:25:31,614 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2024-11-02 12:25:31,614 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-02 12:25:31,614 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2024-11-02 12:25:31,615 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int [2024-11-02 12:25:31,616 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-11-02 12:25:31,618 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-02 12:25:31,619 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-02 12:25:31,619 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2024-11-02 12:25:31,619 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-11-02 12:25:31,761 INFO L238 CfgBuilder]: Building ICFG [2024-11-02 12:25:31,763 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-02 12:25:35,478 INFO L? ?]: Removed 230 outVars from TransFormulas that were not future-live. [2024-11-02 12:25:35,478 INFO L287 CfgBuilder]: Performing block encoding [2024-11-02 12:25:35,699 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-02 12:25:35,699 INFO L316 CfgBuilder]: Removed 0 assume(true) statements. [2024-11-02 12:25:35,699 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 12:25:35 BoogieIcfgContainer [2024-11-02 12:25:35,700 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-02 12:25:35,702 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-02 12:25:35,702 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-02 12:25:35,706 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-02 12:25:35,707 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.11 12:25:30" (1/3) ... [2024-11-02 12:25:35,708 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@51cb2532 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.11 12:25:35, skipping insertion in model container [2024-11-02 12:25:35,709 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:25:31" (2/3) ... [2024-11-02 12:25:35,710 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@51cb2532 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.11 12:25:35, skipping insertion in model container [2024-11-02 12:25:35,711 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 12:25:35" (3/3) ... [2024-11-02 12:25:35,712 INFO L112 eAbstractionObserver]: Analyzing ICFG aiob_4.c.v+cfa-reducer.c [2024-11-02 12:25:35,734 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-02 12:25:35,735 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 86 error locations. [2024-11-02 12:25:35,815 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-02 12:25:35,826 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;@65b6beed, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-02 12:25:35,827 INFO L334 AbstractCegarLoop]: Starting to check reachability of 86 error locations. [2024-11-02 12:25:35,832 INFO L276 IsEmpty]: Start isEmpty. Operand has 137 states, 50 states have (on average 2.8) internal successors, (140), 136 states have internal predecessors, (140), 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 12:25:35,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2024-11-02 12:25:35,840 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 12:25:35,841 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1] [2024-11-02 12:25:35,843 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr85ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 83 more)] === [2024-11-02 12:25:35,852 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 12:25:35,852 INFO L85 PathProgramCache]: Analyzing trace with hash 270400, now seen corresponding path program 1 times [2024-11-02 12:25:35,871 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-02 12:25:35,875 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [991525661] [2024-11-02 12:25:35,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 12:25:35,876 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-02 12:25:36,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 12:25:36,461 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 12:25:36,462 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-02 12:25:36,462 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [991525661] [2024-11-02 12:25:36,465 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [991525661] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-02 12:25:36,465 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-02 12:25:36,466 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-02 12:25:36,468 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [962045409] [2024-11-02 12:25:36,470 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-02 12:25:36,477 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-02 12:25:36,477 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-02 12:25:36,524 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-02 12:25:36,525 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-02 12:25:36,529 INFO L87 Difference]: Start difference. First operand has 137 states, 50 states have (on average 2.8) internal successors, (140), 136 states have internal predecessors, (140), 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 4 states, 3 states have (on average 1.0) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-02 12:25:39,760 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.06s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-11-02 12:25:41,923 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.16s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-11-02 12:25:44,124 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.20s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-11-02 12:25:44,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-02 12:25:44,401 INFO L93 Difference]: Finished difference Result 138 states and 139 transitions. [2024-11-02 12:25:44,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-02 12:25:44,404 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 1.0) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 3 [2024-11-02 12:25:44,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-02 12:25:44,412 INFO L225 Difference]: With dead ends: 138 [2024-11-02 12:25:44,412 INFO L226 Difference]: Without dead ends: 136 [2024-11-02 12:25:44,413 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-02 12:25:44,417 INFO L432 NwaCegarLoop]: 51 mSDtfsCounter, 123 mSDsluCounter, 53 mSDsCounter, 0 mSdLazyCounter, 182 mSolverCounterSat, 0 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 123 SdHoareTripleChecker+Valid, 104 SdHoareTripleChecker+Invalid, 185 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 182 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.8s IncrementalHoareTripleChecker+Time [2024-11-02 12:25:44,418 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [123 Valid, 104 Invalid, 185 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 182 Invalid, 3 Unknown, 0 Unchecked, 7.8s Time] [2024-11-02 12:25:44,436 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2024-11-02 12:25:44,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 136. [2024-11-02 12:25:44,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136 states, 50 states have (on average 2.72) internal successors, (136), 135 states have internal predecessors, (136), 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 12:25:44,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 136 transitions. [2024-11-02 12:25:44,455 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 136 transitions. Word has length 3 [2024-11-02 12:25:44,455 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-02 12:25:44,456 INFO L471 AbstractCegarLoop]: Abstraction has 136 states and 136 transitions. [2024-11-02 12:25:44,456 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 1.0) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-02 12:25:44,456 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 136 transitions. [2024-11-02 12:25:44,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2024-11-02 12:25:44,456 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 12:25:44,456 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1] [2024-11-02 12:25:44,457 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-02 12:25:44,457 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 83 more)] === [2024-11-02 12:25:44,458 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 12:25:44,458 INFO L85 PathProgramCache]: Analyzing trace with hash 270267, now seen corresponding path program 1 times [2024-11-02 12:25:44,458 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-02 12:25:44,458 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [404758896] [2024-11-02 12:25:44,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 12:25:44,459 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-02 12:25:44,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 12:25:45,196 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 12:25:45,196 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-02 12:25:45,197 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [404758896] [2024-11-02 12:25:45,197 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [404758896] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-02 12:25:45,197 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-02 12:25:45,197 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-02 12:25:45,198 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1072019198] [2024-11-02 12:25:45,198 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-02 12:25:45,199 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-02 12:25:45,199 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-02 12:25:45,201 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-02 12:25:45,201 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-02 12:25:45,202 INFO L87 Difference]: Start difference. First operand 136 states and 136 transitions. Second operand has 4 states, 3 states have (on average 1.0) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-02 12:25:48,391 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.05s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-11-02 12:25:50,570 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-11-02 12:25:50,878 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-02 12:25:50,878 INFO L93 Difference]: Finished difference Result 95 states and 95 transitions. [2024-11-02 12:25:50,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-02 12:25:50,879 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 1.0) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 3 [2024-11-02 12:25:50,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-02 12:25:50,881 INFO L225 Difference]: With dead ends: 95 [2024-11-02 12:25:50,881 INFO L226 Difference]: Without dead ends: 95 [2024-11-02 12:25:50,881 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2024-11-02 12:25:50,883 INFO L432 NwaCegarLoop]: 7 mSDtfsCounter, 131 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 136 mSolverCounterSat, 41 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 131 SdHoareTripleChecker+Valid, 13 SdHoareTripleChecker+Invalid, 179 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 136 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.6s IncrementalHoareTripleChecker+Time [2024-11-02 12:25:50,884 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [131 Valid, 13 Invalid, 179 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 136 Invalid, 2 Unknown, 0 Unchecked, 5.6s Time] [2024-11-02 12:25:50,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2024-11-02 12:25:50,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 95. [2024-11-02 12:25:50,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 50 states have (on average 1.9) internal successors, (95), 94 states have internal predecessors, (95), 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 12:25:50,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 95 transitions. [2024-11-02 12:25:50,892 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 95 transitions. Word has length 3 [2024-11-02 12:25:50,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-02 12:25:50,893 INFO L471 AbstractCegarLoop]: Abstraction has 95 states and 95 transitions. [2024-11-02 12:25:50,893 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 1.0) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-02 12:25:50,893 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 95 transitions. [2024-11-02 12:25:50,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2024-11-02 12:25:50,894 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 12:25:50,894 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1] [2024-11-02 12:25:50,894 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-02 12:25:50,895 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 83 more)] === [2024-11-02 12:25:50,895 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 12:25:50,896 INFO L85 PathProgramCache]: Analyzing trace with hash 270268, now seen corresponding path program 1 times [2024-11-02 12:25:50,897 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-02 12:25:50,897 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1177212177] [2024-11-02 12:25:50,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 12:25:50,898 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-02 12:25:51,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 12:25:51,458 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 12:25:51,458 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-02 12:25:51,458 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1177212177] [2024-11-02 12:25:51,459 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1177212177] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-02 12:25:51,459 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-02 12:25:51,459 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-02 12:25:51,459 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1180645351] [2024-11-02 12:25:51,459 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-02 12:25:51,460 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-02 12:25:51,460 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-02 12:25:51,461 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-02 12:25:51,461 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-02 12:25:51,462 INFO L87 Difference]: Start difference. First operand 95 states and 95 transitions. Second operand has 4 states, 3 states have (on average 1.0) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-02 12:25:54,123 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-11-02 12:25:56,283 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.16s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-11-02 12:25:58,466 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.18s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-11-02 12:25:58,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-02 12:25:58,816 INFO L93 Difference]: Finished difference Result 54 states and 54 transitions. [2024-11-02 12:25:58,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-02 12:25:58,822 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 1.0) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 3 [2024-11-02 12:25:58,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-02 12:25:58,823 INFO L225 Difference]: With dead ends: 54 [2024-11-02 12:25:58,823 INFO L226 Difference]: Without dead ends: 54 [2024-11-02 12:25:58,824 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-02 12:25:58,828 INFO L432 NwaCegarLoop]: 10 mSDtfsCounter, 40 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 92 mSolverCounterSat, 40 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 135 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 92 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.3s IncrementalHoareTripleChecker+Time [2024-11-02 12:25:58,829 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [40 Valid, 25 Invalid, 135 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 92 Invalid, 3 Unknown, 0 Unchecked, 7.3s Time] [2024-11-02 12:25:58,830 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2024-11-02 12:25:58,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2024-11-02 12:25:58,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 50 states have (on average 1.08) internal successors, (54), 53 states have internal predecessors, (54), 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 12:25:58,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 54 transitions. [2024-11-02 12:25:58,835 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 54 transitions. Word has length 3 [2024-11-02 12:25:58,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-02 12:25:58,836 INFO L471 AbstractCegarLoop]: Abstraction has 54 states and 54 transitions. [2024-11-02 12:25:58,836 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 1.0) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-02 12:25:58,837 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 54 transitions. [2024-11-02 12:25:58,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2024-11-02 12:25:58,844 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 12:25:58,844 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-02 12:25:58,844 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-11-02 12:25:58,845 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr82ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 83 more)] === [2024-11-02 12:25:58,845 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 12:25:58,846 INFO L85 PathProgramCache]: Analyzing trace with hash 1464139527, now seen corresponding path program 1 times [2024-11-02 12:25:58,846 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-02 12:25:58,846 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1540160980] [2024-11-02 12:25:58,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 12:25:58,846 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-02 12:26:06,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 12:26:07,235 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 12:26:07,236 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-02 12:26:07,236 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1540160980] [2024-11-02 12:26:07,236 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1540160980] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-02 12:26:07,236 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-02 12:26:07,236 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-02 12:26:07,237 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1613324715] [2024-11-02 12:26:07,237 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-02 12:26:07,237 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-02 12:26:07,237 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-02 12:26:07,240 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-02 12:26:07,240 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-02 12:26:07,240 INFO L87 Difference]: Start difference. First operand 54 states and 54 transitions. Second operand has 5 states, 5 states have (on average 9.4) internal successors, (47), 5 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)