./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/bitvector-loops/verisec_sendmail_tTflag_arr_one_loop.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability 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_c8f01166-7f9c-45f4-917e-963ea490ba93/bin/utaipan-verify-DbMuA5NWw2/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8f01166-7f9c-45f4-917e-963ea490ba93/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_c8f01166-7f9c-45f4-917e-963ea490ba93/bin/utaipan-verify-DbMuA5NWw2/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8f01166-7f9c-45f4-917e-963ea490ba93/bin/utaipan-verify-DbMuA5NWw2/config/TaipanReach.xml -i ../../sv-benchmarks/c/bitvector-loops/verisec_sendmail_tTflag_arr_one_loop.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8f01166-7f9c-45f4-917e-963ea490ba93/bin/utaipan-verify-DbMuA5NWw2/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8f01166-7f9c-45f4-917e-963ea490ba93/bin/utaipan-verify-DbMuA5NWw2 --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash bec73cbd355af8995620266d1bb50e13212a1740ed8bd583620b6985b8fd569c --- Real Ultimate output --- This is Ultimate 0.2.5-dev-4fc63b2 [2024-11-02 12:40:21,230 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-02 12:40:21,289 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8f01166-7f9c-45f4-917e-963ea490ba93/bin/utaipan-verify-DbMuA5NWw2/config/svcomp-Reach-32bit-Taipan_Default.epf [2024-11-02 12:40:21,294 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-02 12:40:21,295 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-02 12:40:21,319 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-02 12:40:21,319 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-02 12:40:21,320 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-02 12:40:21,320 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-02 12:40:21,321 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-02 12:40:21,321 INFO L153 SettingsManager]: * User list type=DISABLED [2024-11-02 12:40:21,322 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2024-11-02 12:40:21,322 INFO L153 SettingsManager]: * Explicit value domain=true [2024-11-02 12:40:21,322 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2024-11-02 12:40:21,323 INFO L153 SettingsManager]: * Octagon Domain=false [2024-11-02 12:40:21,323 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2024-11-02 12:40:21,324 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2024-11-02 12:40:21,324 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2024-11-02 12:40:21,324 INFO L153 SettingsManager]: * Interval Domain=false [2024-11-02 12:40:21,325 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2024-11-02 12:40:21,325 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2024-11-02 12:40:21,329 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2024-11-02 12:40:21,330 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-02 12:40:21,331 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-02 12:40:21,334 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-02 12:40:21,335 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-02 12:40:21,335 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-02 12:40:21,335 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-02 12:40:21,336 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-02 12:40:21,336 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-02 12:40:21,336 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-02 12:40:21,337 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-02 12:40:21,337 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-02 12:40:21,337 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-02 12:40:21,338 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-02 12:40:21,340 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-02 12:40:21,340 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-02 12:40:21,340 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-02 12:40:21,341 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2024-11-02 12:40:21,341 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-02 12:40:21,341 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-02 12:40:21,342 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-02 12:40:21,342 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2024-11-02 12:40:21,342 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-02 12:40:21,343 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-02 12:40:21,343 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2024-11-02 12:40:21,343 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-02 12:40:21,343 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_c8f01166-7f9c-45f4-917e-963ea490ba93/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8f01166-7f9c-45f4-917e-963ea490ba93/bin/utaipan-verify-DbMuA5NWw2 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> bec73cbd355af8995620266d1bb50e13212a1740ed8bd583620b6985b8fd569c [2024-11-02 12:40:21,587 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-02 12:40:21,618 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-02 12:40:21,622 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-02 12:40:21,625 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-02 12:40:21,625 INFO L274 PluginConnector]: CDTParser initialized [2024-11-02 12:40:21,627 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8f01166-7f9c-45f4-917e-963ea490ba93/bin/utaipan-verify-DbMuA5NWw2/../../sv-benchmarks/c/bitvector-loops/verisec_sendmail_tTflag_arr_one_loop.c Unable to find full path for "g++" [2024-11-02 12:40:23,793 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-02 12:40:24,088 INFO L384 CDTParser]: Found 1 translation units. [2024-11-02 12:40:24,089 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8f01166-7f9c-45f4-917e-963ea490ba93/sv-benchmarks/c/bitvector-loops/verisec_sendmail_tTflag_arr_one_loop.c [2024-11-02 12:40:24,096 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8f01166-7f9c-45f4-917e-963ea490ba93/bin/utaipan-verify-DbMuA5NWw2/data/4cfd51459/f92f372df3aa44f2a1e73fe784939d61/FLAG70c7b7ba5 [2024-11-02 12:40:24,115 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8f01166-7f9c-45f4-917e-963ea490ba93/bin/utaipan-verify-DbMuA5NWw2/data/4cfd51459/f92f372df3aa44f2a1e73fe784939d61 [2024-11-02 12:40:24,117 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-02 12:40:24,119 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-02 12:40:24,121 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-02 12:40:24,121 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-02 12:40:24,128 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-02 12:40:24,129 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 12:40:24" (1/1) ... [2024-11-02 12:40:24,130 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1385129c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:40:24, skipping insertion in model container [2024-11-02 12:40:24,133 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 12:40:24" (1/1) ... [2024-11-02 12:40:24,155 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-02 12:40:24,375 WARN L251 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8f01166-7f9c-45f4-917e-963ea490ba93/sv-benchmarks/c/bitvector-loops/verisec_sendmail_tTflag_arr_one_loop.c[387,400] [2024-11-02 12:40:24,411 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-02 12:40:24,437 INFO L200 MainTranslator]: Completed pre-run [2024-11-02 12:40:24,453 WARN L251 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8f01166-7f9c-45f4-917e-963ea490ba93/sv-benchmarks/c/bitvector-loops/verisec_sendmail_tTflag_arr_one_loop.c[387,400] [2024-11-02 12:40:24,470 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-02 12:40:24,517 INFO L204 MainTranslator]: Completed translation [2024-11-02 12:40:24,518 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:40:24 WrapperNode [2024-11-02 12:40:24,518 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-02 12:40:24,519 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-02 12:40:24,520 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-02 12:40:24,520 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-02 12:40:24,529 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:40:24" (1/1) ... [2024-11-02 12:40:24,539 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:40:24" (1/1) ... [2024-11-02 12:40:24,571 INFO L138 Inliner]: procedures = 14, calls = 15, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 58 [2024-11-02 12:40:24,572 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-02 12:40:24,573 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-02 12:40:24,574 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-02 12:40:24,574 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-02 12:40:24,584 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:40:24" (1/1) ... [2024-11-02 12:40:24,585 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:40:24" (1/1) ... [2024-11-02 12:40:24,587 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:40:24" (1/1) ... [2024-11-02 12:40:24,587 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:40:24" (1/1) ... [2024-11-02 12:40:24,593 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:40:24" (1/1) ... [2024-11-02 12:40:24,597 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:40:24" (1/1) ... [2024-11-02 12:40:24,599 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:40:24" (1/1) ... [2024-11-02 12:40:24,600 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:40:24" (1/1) ... [2024-11-02 12:40:24,602 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-02 12:40:24,603 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-02 12:40:24,603 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-02 12:40:24,604 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-02 12:40:24,605 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:40:24" (1/1) ... [2024-11-02 12:40:24,612 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2024-11-02 12:40:24,626 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8f01166-7f9c-45f4-917e-963ea490ba93/bin/utaipan-verify-DbMuA5NWw2/z3 [2024-11-02 12:40:24,641 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8f01166-7f9c-45f4-917e-963ea490ba93/bin/utaipan-verify-DbMuA5NWw2/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2024-11-02 12:40:24,644 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8f01166-7f9c-45f4-917e-963ea490ba93/bin/utaipan-verify-DbMuA5NWw2/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2024-11-02 12:40:24,675 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-02 12:40:24,675 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2024-11-02 12:40:24,675 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-11-02 12:40:24,677 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2024-11-02 12:40:24,678 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-02 12:40:24,678 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-02 12:40:24,678 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2024-11-02 12:40:24,678 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-11-02 12:40:24,771 INFO L238 CfgBuilder]: Building ICFG [2024-11-02 12:40:24,774 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-02 12:40:24,996 INFO L? ?]: Removed 12 outVars from TransFormulas that were not future-live. [2024-11-02 12:40:24,996 INFO L287 CfgBuilder]: Performing block encoding [2024-11-02 12:40:25,071 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-02 12:40:25,076 INFO L316 CfgBuilder]: Removed 2 assume(true) statements. [2024-11-02 12:40:25,077 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 12:40:25 BoogieIcfgContainer [2024-11-02 12:40:25,077 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-02 12:40:25,080 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-02 12:40:25,081 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-02 12:40:25,084 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-02 12:40:25,085 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.11 12:40:24" (1/3) ... [2024-11-02 12:40:25,086 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3cbda534 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.11 12:40:25, skipping insertion in model container [2024-11-02 12:40:25,086 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:40:24" (2/3) ... [2024-11-02 12:40:25,086 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3cbda534 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.11 12:40:25, skipping insertion in model container [2024-11-02 12:40:25,086 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 12:40:25" (3/3) ... [2024-11-02 12:40:25,088 INFO L112 eAbstractionObserver]: Analyzing ICFG verisec_sendmail_tTflag_arr_one_loop.c [2024-11-02 12:40:25,113 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-02 12:40:25,114 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-11-02 12:40:25,203 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-02 12:40:25,212 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=LoopHeads, 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;@10a78603, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-02 12:40:25,213 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-11-02 12:40:25,218 INFO L276 IsEmpty]: Start isEmpty. Operand has 8 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 7 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-02 12:40:25,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2024-11-02 12:40:25,227 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 12:40:25,228 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2024-11-02 12:40:25,229 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-02 12:40:25,237 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 12:40:25,237 INFO L85 PathProgramCache]: Analyzing trace with hash 72620913, now seen corresponding path program 1 times [2024-11-02 12:40:25,250 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-02 12:40:25,251 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1537075237] [2024-11-02 12:40:25,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 12:40:25,252 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-02 12:40:25,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 12:40:25,556 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 12:40:25,557 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-02 12:40:25,558 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1537075237] [2024-11-02 12:40:25,558 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1537075237] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-02 12:40:25,559 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-02 12:40:25,559 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-02 12:40:25,561 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [293325607] [2024-11-02 12:40:25,563 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-02 12:40:25,569 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-02 12:40:25,570 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-02 12:40:25,598 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-02 12:40:25,599 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-02 12:40:25,602 INFO L87 Difference]: Start difference. First operand has 8 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 7 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-02 12:40:25,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-02 12:40:25,661 INFO L93 Difference]: Finished difference Result 16 states and 21 transitions. [2024-11-02 12:40:25,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-02 12:40:25,666 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2024-11-02 12:40:25,666 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-02 12:40:25,690 INFO L225 Difference]: With dead ends: 16 [2024-11-02 12:40:25,697 INFO L226 Difference]: Without dead ends: 8 [2024-11-02 12:40:25,709 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 12:40:25,716 INFO L432 NwaCegarLoop]: 3 mSDtfsCounter, 0 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-02 12:40:25,718 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 6 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-02 12:40:25,771 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8 states. [2024-11-02 12:40:25,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8 to 7. [2024-11-02 12:40:25,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 6 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-02 12:40:25,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 8 transitions. [2024-11-02 12:40:25,793 INFO L78 Accepts]: Start accepts. Automaton has 7 states and 8 transitions. Word has length 5 [2024-11-02 12:40:25,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-02 12:40:25,794 INFO L471 AbstractCegarLoop]: Abstraction has 7 states and 8 transitions. [2024-11-02 12:40:25,795 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-02 12:40:25,795 INFO L276 IsEmpty]: Start isEmpty. Operand 7 states and 8 transitions. [2024-11-02 12:40:25,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2024-11-02 12:40:25,796 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 12:40:25,796 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2024-11-02 12:40:25,796 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-02 12:40:25,798 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-02 12:40:25,800 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 12:40:25,800 INFO L85 PathProgramCache]: Analyzing trace with hash -2048377949, now seen corresponding path program 1 times [2024-11-02 12:40:25,800 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-02 12:40:25,800 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [836199389] [2024-11-02 12:40:25,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 12:40:25,801 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-02 12:40:25,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 12:40:25,967 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 12:40:25,967 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-02 12:40:25,968 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [836199389] [2024-11-02 12:40:25,968 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [836199389] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-02 12:40:25,968 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [488523921] [2024-11-02 12:40:25,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 12:40:25,969 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-02 12:40:25,969 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8f01166-7f9c-45f4-917e-963ea490ba93/bin/utaipan-verify-DbMuA5NWw2/z3 [2024-11-02 12:40:25,977 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8f01166-7f9c-45f4-917e-963ea490ba93/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-02 12:40:25,980 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8f01166-7f9c-45f4-917e-963ea490ba93/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-02 12:40:26,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 12:40:26,054 INFO L255 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-11-02 12:40:26,059 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-02 12:40:26,113 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 12:40:26,113 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-02 12:40:26,150 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 12:40:26,150 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [488523921] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-02 12:40:26,150 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [435297956] [2024-11-02 12:40:26,182 INFO L159 IcfgInterpreter]: Started Sifa with 6 locations of interest [2024-11-02 12:40:26,182 INFO L166 IcfgInterpreter]: Building call graph [2024-11-02 12:40:26,186 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-02 12:40:26,191 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-02 12:40:26,192 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-02 12:40:26,739 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-02 12:40:26,889 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSifa [435297956] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-02 12:40:26,889 INFO L185 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2024-11-02 12:40:26,889 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [3, 3, 3] total 9 [2024-11-02 12:40:26,892 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2070117562] [2024-11-02 12:40:26,893 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-02 12:40:26,893 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-02 12:40:26,894 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-02 12:40:26,895 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-02 12:40:26,896 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2024-11-02 12:40:26,896 INFO L87 Difference]: Start difference. First operand 7 states and 8 transitions. Second operand has 5 states, 5 states have (on average 1.2) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-02 12:40:26,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-02 12:40:26,957 INFO L93 Difference]: Finished difference Result 12 states and 14 transitions. [2024-11-02 12:40:26,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-02 12:40:26,958 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.2) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2024-11-02 12:40:26,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-02 12:40:26,959 INFO L225 Difference]: With dead ends: 12 [2024-11-02 12:40:26,959 INFO L226 Difference]: Without dead ends: 9 [2024-11-02 12:40:26,960 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2024-11-02 12:40:26,963 INFO L432 NwaCegarLoop]: 2 mSDtfsCounter, 0 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 7 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-02 12:40:26,965 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 7 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-02 12:40:26,966 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states. [2024-11-02 12:40:26,970 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 8. [2024-11-02 12:40:26,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8 states, 7 states have (on average 1.2857142857142858) internal successors, (9), 7 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 12:40:26,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 9 transitions. [2024-11-02 12:40:26,972 INFO L78 Accepts]: Start accepts. Automaton has 8 states and 9 transitions. Word has length 6 [2024-11-02 12:40:26,972 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-02 12:40:26,972 INFO L471 AbstractCegarLoop]: Abstraction has 8 states and 9 transitions. [2024-11-02 12:40:26,973 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.2) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-02 12:40:26,973 INFO L276 IsEmpty]: Start isEmpty. Operand 8 states and 9 transitions. [2024-11-02 12:40:26,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2024-11-02 12:40:26,974 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 12:40:26,974 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-11-02 12:40:26,998 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8f01166-7f9c-45f4-917e-963ea490ba93/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-11-02 12:40:27,178 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8f01166-7f9c-45f4-917e-963ea490ba93/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-02 12:40:27,179 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-02 12:40:27,180 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 12:40:27,180 INFO L85 PathProgramCache]: Analyzing trace with hash 924036686, now seen corresponding path program 1 times [2024-11-02 12:40:27,180 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-02 12:40:27,181 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [325976756] [2024-11-02 12:40:27,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 12:40:27,181 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-02 12:40:27,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 12:40:27,360 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-02 12:40:27,361 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-02 12:40:27,361 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [325976756] [2024-11-02 12:40:27,361 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [325976756] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-02 12:40:27,361 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1780763035] [2024-11-02 12:40:27,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 12:40:27,362 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-02 12:40:27,362 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8f01166-7f9c-45f4-917e-963ea490ba93/bin/utaipan-verify-DbMuA5NWw2/z3 [2024-11-02 12:40:27,367 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8f01166-7f9c-45f4-917e-963ea490ba93/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-02 12:40:27,368 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8f01166-7f9c-45f4-917e-963ea490ba93/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-02 12:40:27,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 12:40:27,448 INFO L255 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-11-02 12:40:27,449 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-02 12:40:27,468 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-02 12:40:27,469 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-02 12:40:27,495 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-02 12:40:27,495 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1780763035] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-02 12:40:27,496 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [905022847] [2024-11-02 12:40:27,498 INFO L159 IcfgInterpreter]: Started Sifa with 6 locations of interest [2024-11-02 12:40:27,502 INFO L166 IcfgInterpreter]: Building call graph [2024-11-02 12:40:27,503 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-02 12:40:27,503 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-02 12:40:27,504 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-02 12:40:27,909 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-02 12:40:28,040 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '159#(and (<= 1 |#StackHeapBarrier|) (<= 0 |ULTIMATE.start_main_~idx_in~0#1|) (= |ULTIMATE.start_main_~#in~0#1.offset| 0) (or (exists ((|v_ULTIMATE.start_main_~c~0#1_26| Int)) (< (mod |v_ULTIMATE.start_main_~c~0#1_26| 256) 48)) (exists ((|v_ULTIMATE.start_main_~c~0#1_26| Int)) (< 57 (mod |v_ULTIMATE.start_main_~c~0#1_26| 256)))) (<= 2 |ULTIMATE.start_main_~#in~0#1.base|))' at error location [2024-11-02 12:40:28,041 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-02 12:40:28,041 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-02 12:40:28,041 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2024-11-02 12:40:28,042 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1403944492] [2024-11-02 12:40:28,042 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-02 12:40:28,042 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-02 12:40:28,042 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-02 12:40:28,043 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-02 12:40:28,044 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2024-11-02 12:40:28,044 INFO L87 Difference]: Start difference. First operand 8 states and 9 transitions. Second operand has 7 states, 7 states have (on average 1.7142857142857142) internal successors, (12), 6 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-02 12:40:28,080 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-02 12:40:28,080 INFO L93 Difference]: Finished difference Result 17 states and 22 transitions. [2024-11-02 12:40:28,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-02 12:40:28,081 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 1.7142857142857142) internal successors, (12), 6 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2024-11-02 12:40:28,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-02 12:40:28,082 INFO L225 Difference]: With dead ends: 17 [2024-11-02 12:40:28,082 INFO L226 Difference]: Without dead ends: 12 [2024-11-02 12:40:28,083 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2024-11-02 12:40:28,086 INFO L432 NwaCegarLoop]: 2 mSDtfsCounter, 0 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 4 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-02 12:40:28,088 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 4 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-02 12:40:28,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2024-11-02 12:40:28,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 11. [2024-11-02 12:40:28,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11 states, 10 states have (on average 1.2) internal successors, (12), 10 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-02 12:40:28,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 12 transitions. [2024-11-02 12:40:28,098 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 12 transitions. Word has length 7 [2024-11-02 12:40:28,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-02 12:40:28,098 INFO L471 AbstractCegarLoop]: Abstraction has 11 states and 12 transitions. [2024-11-02 12:40:28,099 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 1.7142857142857142) internal successors, (12), 6 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-02 12:40:28,101 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 12 transitions. [2024-11-02 12:40:28,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2024-11-02 12:40:28,102 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 12:40:28,102 INFO L215 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1] [2024-11-02 12:40:28,125 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8f01166-7f9c-45f4-917e-963ea490ba93/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-11-02 12:40:28,303 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8f01166-7f9c-45f4-917e-963ea490ba93/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-02 12:40:28,304 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-02 12:40:28,304 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 12:40:28,305 INFO L85 PathProgramCache]: Analyzing trace with hash 905173952, now seen corresponding path program 2 times [2024-11-02 12:40:28,305 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-02 12:40:28,305 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1479713751] [2024-11-02 12:40:28,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 12:40:28,305 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-02 12:40:28,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 12:40:28,467 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-02 12:40:28,467 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-02 12:40:28,468 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1479713751] [2024-11-02 12:40:28,468 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1479713751] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-02 12:40:28,468 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1346592577] [2024-11-02 12:40:28,468 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-02 12:40:28,469 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-02 12:40:28,469 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8f01166-7f9c-45f4-917e-963ea490ba93/bin/utaipan-verify-DbMuA5NWw2/z3 [2024-11-02 12:40:28,471 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8f01166-7f9c-45f4-917e-963ea490ba93/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-02 12:40:28,472 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8f01166-7f9c-45f4-917e-963ea490ba93/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-02 12:40:28,543 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-02 12:40:28,544 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-02 12:40:28,545 INFO L255 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-11-02 12:40:28,547 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-02 12:40:28,717 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-11-02 12:40:28,717 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-02 12:40:28,952 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-11-02 12:40:28,952 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1346592577] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-02 12:40:28,953 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1284190124] [2024-11-02 12:40:28,955 INFO L159 IcfgInterpreter]: Started Sifa with 6 locations of interest [2024-11-02 12:40:28,955 INFO L166 IcfgInterpreter]: Building call graph [2024-11-02 12:40:28,956 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-02 12:40:28,956 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-02 12:40:28,956 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-02 12:40:29,261 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-02 12:40:29,429 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '272#(and (or (exists ((|v_ULTIMATE.start_main_~c~0#1_31| Int)) (< (mod |v_ULTIMATE.start_main_~c~0#1_31| 256) 48)) (exists ((|v_ULTIMATE.start_main_~c~0#1_31| Int)) (< 57 (mod |v_ULTIMATE.start_main_~c~0#1_31| 256)))) (<= 1 |#StackHeapBarrier|) (<= 0 |ULTIMATE.start_main_~idx_in~0#1|) (= |ULTIMATE.start_main_~#in~0#1.offset| 0) (<= 2 |ULTIMATE.start_main_~#in~0#1.base|))' at error location [2024-11-02 12:40:29,429 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-02 12:40:29,430 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-02 12:40:29,430 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 10 [2024-11-02 12:40:29,431 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1754953957] [2024-11-02 12:40:29,431 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-02 12:40:29,432 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-11-02 12:40:29,432 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-02 12:40:29,435 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-11-02 12:40:29,436 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2024-11-02 12:40:29,436 INFO L87 Difference]: Start difference. First operand 11 states and 12 transitions. Second operand has 10 states, 10 states have (on average 1.8) internal successors, (18), 10 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-02 12:40:29,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-02 12:40:29,663 INFO L93 Difference]: Finished difference Result 20 states and 24 transitions. [2024-11-02 12:40:29,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-02 12:40:29,665 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.8) internal successors, (18), 10 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2024-11-02 12:40:29,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-02 12:40:29,666 INFO L225 Difference]: With dead ends: 20 [2024-11-02 12:40:29,667 INFO L226 Difference]: Without dead ends: 14 [2024-11-02 12:40:29,667 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=87, Invalid=255, Unknown=0, NotChecked=0, Total=342 [2024-11-02 12:40:29,668 INFO L432 NwaCegarLoop]: 2 mSDtfsCounter, 0 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 11 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-02 12:40:29,672 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 11 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-02 12:40:29,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2024-11-02 12:40:29,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2024-11-02 12:40:29,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14 states, 13 states have (on average 1.1538461538461537) internal successors, (15), 13 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-02 12:40:29,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 15 transitions. [2024-11-02 12:40:29,681 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 15 transitions. Word has length 10 [2024-11-02 12:40:29,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-02 12:40:29,682 INFO L471 AbstractCegarLoop]: Abstraction has 14 states and 15 transitions. [2024-11-02 12:40:29,683 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 1.8) internal successors, (18), 10 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-02 12:40:29,683 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 15 transitions. [2024-11-02 12:40:29,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2024-11-02 12:40:29,684 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 12:40:29,685 INFO L215 NwaCegarLoop]: trace histogram [5, 3, 1, 1, 1, 1, 1] [2024-11-02 12:40:29,708 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8f01166-7f9c-45f4-917e-963ea490ba93/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-11-02 12:40:29,889 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8f01166-7f9c-45f4-917e-963ea490ba93/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-02 12:40:29,889 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-02 12:40:29,890 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 12:40:29,890 INFO L85 PathProgramCache]: Analyzing trace with hash 1182613870, now seen corresponding path program 3 times [2024-11-02 12:40:29,895 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-02 12:40:29,896 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [993009068] [2024-11-02 12:40:29,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 12:40:29,896 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-02 12:40:29,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 12:40:30,163 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-02 12:40:30,163 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-02 12:40:30,164 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [993009068] [2024-11-02 12:40:30,164 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [993009068] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-02 12:40:30,164 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [850748743] [2024-11-02 12:40:30,164 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-02 12:40:30,164 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-02 12:40:30,165 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8f01166-7f9c-45f4-917e-963ea490ba93/bin/utaipan-verify-DbMuA5NWw2/z3 [2024-11-02 12:40:30,167 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8f01166-7f9c-45f4-917e-963ea490ba93/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-02 12:40:30,168 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8f01166-7f9c-45f4-917e-963ea490ba93/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-02 12:40:30,246 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-02 12:40:30,246 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-02 12:40:30,249 INFO L255 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-11-02 12:40:30,250 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-02 12:40:30,273 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-02 12:40:30,275 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-02 12:40:30,365 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-02 12:40:30,365 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [850748743] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-02 12:40:30,365 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1554775481] [2024-11-02 12:40:30,367 INFO L159 IcfgInterpreter]: Started Sifa with 6 locations of interest [2024-11-02 12:40:30,369 INFO L166 IcfgInterpreter]: Building call graph [2024-11-02 12:40:30,369 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-02 12:40:30,370 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-02 12:40:30,370 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-02 12:40:30,563 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-02 12:40:30,677 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '429#(and (<= 1 |#StackHeapBarrier|) (<= 0 |ULTIMATE.start_main_~idx_in~0#1|) (= |ULTIMATE.start_main_~#in~0#1.offset| 0) (or (exists ((|v_ULTIMATE.start_main_~c~0#1_38| Int)) (< (mod |v_ULTIMATE.start_main_~c~0#1_38| 256) 48)) (exists ((|v_ULTIMATE.start_main_~c~0#1_38| Int)) (< 57 (mod |v_ULTIMATE.start_main_~c~0#1_38| 256)))) (<= 2 |ULTIMATE.start_main_~#in~0#1.base|))' at error location [2024-11-02 12:40:30,677 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-02 12:40:30,677 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-02 12:40:30,678 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2024-11-02 12:40:30,678 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1337188392] [2024-11-02 12:40:30,678 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-02 12:40:30,678 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-11-02 12:40:30,678 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-02 12:40:30,679 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-11-02 12:40:30,680 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=203, Unknown=0, NotChecked=0, Total=306 [2024-11-02 12:40:30,680 INFO L87 Difference]: Start difference. First operand 14 states and 15 transitions. Second operand has 14 states, 14 states have (on average 1.4285714285714286) internal successors, (20), 13 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 12:40:30,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-02 12:40:30,730 INFO L93 Difference]: Finished difference Result 27 states and 34 transitions. [2024-11-02 12:40:30,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-11-02 12:40:30,730 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.4285714285714286) internal successors, (20), 13 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) Word has length 13 [2024-11-02 12:40:30,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-02 12:40:30,731 INFO L225 Difference]: With dead ends: 27 [2024-11-02 12:40:30,731 INFO L226 Difference]: Without dead ends: 20 [2024-11-02 12:40:30,732 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=103, Invalid=203, Unknown=0, NotChecked=0, Total=306 [2024-11-02 12:40:30,732 INFO L432 NwaCegarLoop]: 2 mSDtfsCounter, 0 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 10 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-02 12:40:30,733 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 10 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-02 12:40:30,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2024-11-02 12:40:30,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2024-11-02 12:40:30,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 19 states have (on average 1.105263157894737) internal successors, (21), 19 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-02 12:40:30,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 21 transitions. [2024-11-02 12:40:30,746 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 21 transitions. Word has length 13 [2024-11-02 12:40:30,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-02 12:40:30,746 INFO L471 AbstractCegarLoop]: Abstraction has 20 states and 21 transitions. [2024-11-02 12:40:30,746 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.4285714285714286) internal successors, (20), 13 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 12:40:30,747 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 21 transitions. [2024-11-02 12:40:30,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2024-11-02 12:40:30,747 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 12:40:30,747 INFO L215 NwaCegarLoop]: trace histogram [11, 3, 1, 1, 1, 1, 1] [2024-11-02 12:40:30,768 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8f01166-7f9c-45f4-917e-963ea490ba93/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-11-02 12:40:30,948 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8f01166-7f9c-45f4-917e-963ea490ba93/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-02 12:40:30,948 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-02 12:40:30,949 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 12:40:30,949 INFO L85 PathProgramCache]: Analyzing trace with hash 319087662, now seen corresponding path program 4 times [2024-11-02 12:40:30,949 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-02 12:40:30,949 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1601909491] [2024-11-02 12:40:30,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 12:40:30,949 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-02 12:40:30,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 12:40:31,693 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2024-11-02 12:40:31,695 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-02 12:40:31,695 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1601909491] [2024-11-02 12:40:31,696 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1601909491] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-02 12:40:31,697 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1652707162] [2024-11-02 12:40:31,697 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-02 12:40:31,699 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-02 12:40:31,699 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8f01166-7f9c-45f4-917e-963ea490ba93/bin/utaipan-verify-DbMuA5NWw2/z3 [2024-11-02 12:40:31,704 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8f01166-7f9c-45f4-917e-963ea490ba93/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-02 12:40:31,718 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8f01166-7f9c-45f4-917e-963ea490ba93/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-02 12:40:31,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 12:40:31,962 INFO L255 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 79 conjuncts are in the unsatisfiable core [2024-11-02 12:40:31,970 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-02 12:40:32,028 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 15 treesize of output 1 [2024-11-02 12:40:32,078 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 32 treesize of output 16 [2024-11-02 12:40:32,124 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 32 treesize of output 16 [2024-11-02 12:40:32,198 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 32 treesize of output 16 [2024-11-02 12:40:32,248 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 32 treesize of output 16 [2024-11-02 12:40:32,310 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 32 treesize of output 16 [2024-11-02 12:40:32,367 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 32 treesize of output 16 [2024-11-02 12:40:32,430 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 32 treesize of output 16 [2024-11-02 12:40:32,484 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 32 treesize of output 16 [2024-11-02 12:40:32,535 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 32 treesize of output 16 [2024-11-02 12:40:32,575 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 32 treesize of output 16 [2024-11-02 12:40:32,721 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 12