./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/list-simple/dll2n_remove_all.i --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_d39e3588-c035-4606-a7ec-eb4d7e83bcb3/bin/utaipan-verify-DbMuA5NWw2/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d39e3588-c035-4606-a7ec-eb4d7e83bcb3/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_d39e3588-c035-4606-a7ec-eb4d7e83bcb3/bin/utaipan-verify-DbMuA5NWw2/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d39e3588-c035-4606-a7ec-eb4d7e83bcb3/bin/utaipan-verify-DbMuA5NWw2/config/TaipanReach.xml -i ../../sv-benchmarks/c/list-simple/dll2n_remove_all.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d39e3588-c035-4606-a7ec-eb4d7e83bcb3/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_d39e3588-c035-4606-a7ec-eb4d7e83bcb3/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 b594cdd667b896d6ce097f6fd96950290806f015d929f3b2b06ffea35d861f89 --- Real Ultimate output --- This is Ultimate 0.2.5-dev-4fc63b2 [2024-11-02 12:39:15,486 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-02 12:39:15,571 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d39e3588-c035-4606-a7ec-eb4d7e83bcb3/bin/utaipan-verify-DbMuA5NWw2/config/svcomp-Reach-32bit-Taipan_Default.epf [2024-11-02 12:39:15,585 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-02 12:39:15,586 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-02 12:39:15,626 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-02 12:39:15,627 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-02 12:39:15,628 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-02 12:39:15,629 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-02 12:39:15,630 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-02 12:39:15,630 INFO L153 SettingsManager]: * User list type=DISABLED [2024-11-02 12:39:15,630 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2024-11-02 12:39:15,631 INFO L153 SettingsManager]: * Explicit value domain=true [2024-11-02 12:39:15,632 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2024-11-02 12:39:15,634 INFO L153 SettingsManager]: * Octagon Domain=false [2024-11-02 12:39:15,635 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2024-11-02 12:39:15,635 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2024-11-02 12:39:15,636 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2024-11-02 12:39:15,636 INFO L153 SettingsManager]: * Interval Domain=false [2024-11-02 12:39:15,636 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2024-11-02 12:39:15,637 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2024-11-02 12:39:15,641 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2024-11-02 12:39:15,641 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-02 12:39:15,642 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-02 12:39:15,642 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-02 12:39:15,642 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-02 12:39:15,643 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-02 12:39:15,643 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-02 12:39:15,643 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-02 12:39:15,643 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-02 12:39:15,645 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-02 12:39:15,645 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-02 12:39:15,646 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-02 12:39:15,647 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-02 12:39:15,647 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-02 12:39:15,647 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-02 12:39:15,648 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-02 12:39:15,648 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-02 12:39:15,649 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2024-11-02 12:39:15,649 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-02 12:39:15,649 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-02 12:39:15,650 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-02 12:39:15,650 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2024-11-02 12:39:15,650 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-02 12:39:15,651 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-02 12:39:15,651 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2024-11-02 12:39:15,651 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-02 12:39:15,652 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_d39e3588-c035-4606-a7ec-eb4d7e83bcb3/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d39e3588-c035-4606-a7ec-eb4d7e83bcb3/bin/utaipan-verify-DbMuA5NWw2 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> b594cdd667b896d6ce097f6fd96950290806f015d929f3b2b06ffea35d861f89 [2024-11-02 12:39:15,943 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-02 12:39:15,980 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-02 12:39:15,983 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-02 12:39:15,985 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-02 12:39:15,988 INFO L274 PluginConnector]: CDTParser initialized [2024-11-02 12:39:15,989 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d39e3588-c035-4606-a7ec-eb4d7e83bcb3/bin/utaipan-verify-DbMuA5NWw2/../../sv-benchmarks/c/list-simple/dll2n_remove_all.i Unable to find full path for "g++" [2024-11-02 12:39:18,218 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-02 12:39:18,586 INFO L384 CDTParser]: Found 1 translation units. [2024-11-02 12:39:18,587 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d39e3588-c035-4606-a7ec-eb4d7e83bcb3/sv-benchmarks/c/list-simple/dll2n_remove_all.i [2024-11-02 12:39:18,608 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d39e3588-c035-4606-a7ec-eb4d7e83bcb3/bin/utaipan-verify-DbMuA5NWw2/data/bf7d124ae/d29a9b62a25341e39a5a514f468ce821/FLAG12c27dcfb [2024-11-02 12:39:18,629 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d39e3588-c035-4606-a7ec-eb4d7e83bcb3/bin/utaipan-verify-DbMuA5NWw2/data/bf7d124ae/d29a9b62a25341e39a5a514f468ce821 [2024-11-02 12:39:18,631 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-02 12:39:18,633 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-02 12:39:18,634 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-02 12:39:18,635 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-02 12:39:18,641 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-02 12:39:18,642 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 12:39:18" (1/1) ... [2024-11-02 12:39:18,643 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1f53ce37 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:39:18, skipping insertion in model container [2024-11-02 12:39:18,643 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 12:39:18" (1/1) ... [2024-11-02 12:39:18,688 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-02 12:39:19,214 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_d39e3588-c035-4606-a7ec-eb4d7e83bcb3/sv-benchmarks/c/list-simple/dll2n_remove_all.i[24090,24103] [2024-11-02 12:39:19,227 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-02 12:39:19,248 INFO L200 MainTranslator]: Completed pre-run [2024-11-02 12:39:19,344 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_d39e3588-c035-4606-a7ec-eb4d7e83bcb3/sv-benchmarks/c/list-simple/dll2n_remove_all.i[24090,24103] [2024-11-02 12:39:19,345 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-02 12:39:19,401 INFO L204 MainTranslator]: Completed translation [2024-11-02 12:39:19,403 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:39:19 WrapperNode [2024-11-02 12:39:19,403 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-02 12:39:19,404 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-02 12:39:19,404 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-02 12:39:19,404 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-02 12:39:19,413 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:39:19" (1/1) ... [2024-11-02 12:39:19,436 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:39:19" (1/1) ... [2024-11-02 12:39:19,457 INFO L138 Inliner]: procedures = 126, calls = 31, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 78 [2024-11-02 12:39:19,458 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-02 12:39:19,459 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-02 12:39:19,459 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-02 12:39:19,459 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-02 12:39:19,472 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:39:19" (1/1) ... [2024-11-02 12:39:19,472 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:39:19" (1/1) ... [2024-11-02 12:39:19,479 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:39:19" (1/1) ... [2024-11-02 12:39:19,479 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:39:19" (1/1) ... [2024-11-02 12:39:19,494 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:39:19" (1/1) ... [2024-11-02 12:39:19,499 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:39:19" (1/1) ... [2024-11-02 12:39:19,501 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:39:19" (1/1) ... [2024-11-02 12:39:19,502 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:39:19" (1/1) ... [2024-11-02 12:39:19,506 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-02 12:39:19,507 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-02 12:39:19,507 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-02 12:39:19,508 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-02 12:39:19,509 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:39:19" (1/1) ... [2024-11-02 12:39:19,517 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2024-11-02 12:39:19,532 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d39e3588-c035-4606-a7ec-eb4d7e83bcb3/bin/utaipan-verify-DbMuA5NWw2/z3 [2024-11-02 12:39:19,547 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d39e3588-c035-4606-a7ec-eb4d7e83bcb3/bin/utaipan-verify-DbMuA5NWw2/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2024-11-02 12:39:19,554 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d39e3588-c035-4606-a7ec-eb4d7e83bcb3/bin/utaipan-verify-DbMuA5NWw2/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2024-11-02 12:39:19,585 INFO L130 BoogieDeclarations]: Found specification of procedure myexit [2024-11-02 12:39:19,586 INFO L138 BoogieDeclarations]: Found implementation of procedure myexit [2024-11-02 12:39:19,586 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2024-11-02 12:39:19,586 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-11-02 12:39:19,588 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-02 12:39:19,589 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-11-02 12:39:19,589 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2024-11-02 12:39:19,589 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2024-11-02 12:39:19,589 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-11-02 12:39:19,589 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2024-11-02 12:39:19,589 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2024-11-02 12:39:19,590 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-02 12:39:19,590 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-02 12:39:19,723 INFO L238 CfgBuilder]: Building ICFG [2024-11-02 12:39:19,726 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-02 12:39:19,762 INFO L735 $ProcedureCfgBuilder]: dead code at ProgramPoint myexitFINAL: assume true; [2024-11-02 12:39:19,961 INFO L? ?]: Removed 24 outVars from TransFormulas that were not future-live. [2024-11-02 12:39:19,963 INFO L287 CfgBuilder]: Performing block encoding [2024-11-02 12:39:20,082 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-02 12:39:20,082 INFO L316 CfgBuilder]: Removed 2 assume(true) statements. [2024-11-02 12:39:20,087 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 12:39:20 BoogieIcfgContainer [2024-11-02 12:39:20,087 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-02 12:39:20,090 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-02 12:39:20,090 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-02 12:39:20,099 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-02 12:39:20,100 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.11 12:39:18" (1/3) ... [2024-11-02 12:39:20,101 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1905708b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.11 12:39:20, skipping insertion in model container [2024-11-02 12:39:20,101 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:39:19" (2/3) ... [2024-11-02 12:39:20,102 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1905708b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.11 12:39:20, skipping insertion in model container [2024-11-02 12:39:20,102 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 12:39:20" (3/3) ... [2024-11-02 12:39:20,103 INFO L112 eAbstractionObserver]: Analyzing ICFG dll2n_remove_all.i [2024-11-02 12:39:20,125 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-02 12:39:20,126 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-11-02 12:39:20,208 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-02 12:39:20,218 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;@2b7b6c71, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-02 12:39:20,218 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-11-02 12:39:20,224 INFO L276 IsEmpty]: Start isEmpty. Operand has 13 states, 10 states have (on average 1.5) internal successors, (15), 11 states have internal predecessors, (15), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-02 12:39:20,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2024-11-02 12:39:20,233 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 12:39:20,233 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2024-11-02 12:39:20,234 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-02 12:39:20,242 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 12:39:20,242 INFO L85 PathProgramCache]: Analyzing trace with hash 99583723, now seen corresponding path program 1 times [2024-11-02 12:39:20,254 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-02 12:39:20,255 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1543988319] [2024-11-02 12:39:20,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 12:39:20,256 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-02 12:39:20,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 12:39:20,521 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 12:39:20,522 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-02 12:39:20,523 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1543988319] [2024-11-02 12:39:20,523 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1543988319] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-02 12:39:20,524 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-02 12:39:20,524 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-02 12:39:20,526 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1702180453] [2024-11-02 12:39:20,527 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-02 12:39:20,535 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-02 12:39:20,535 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-02 12:39:20,565 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-02 12:39:20,566 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-02 12:39:20,569 INFO L87 Difference]: Start difference. First operand has 13 states, 10 states have (on average 1.5) internal successors, (15), 11 states have internal predecessors, (15), 1 states have call successors, (1), 1 states have call predecessors, (1), 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 12:39:20,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-02 12:39:20,653 INFO L93 Difference]: Finished difference Result 23 states and 29 transitions. [2024-11-02 12:39:20,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-02 12:39:20,655 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 12:39:20,656 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-02 12:39:20,663 INFO L225 Difference]: With dead ends: 23 [2024-11-02 12:39:20,663 INFO L226 Difference]: Without dead ends: 11 [2024-11-02 12:39:20,666 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 12:39:20,670 INFO L432 NwaCegarLoop]: 8 mSDtfsCounter, 3 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-02 12:39:20,671 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 16 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-02 12:39:20,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2024-11-02 12:39:20,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 9. [2024-11-02 12:39:20,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9 states, 8 states have (on average 1.25) internal successors, (10), 8 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 12:39:20,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 10 transitions. [2024-11-02 12:39:20,705 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 10 transitions. Word has length 5 [2024-11-02 12:39:20,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-02 12:39:20,706 INFO L471 AbstractCegarLoop]: Abstraction has 9 states and 10 transitions. [2024-11-02 12:39:20,706 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 12:39:20,706 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 10 transitions. [2024-11-02 12:39:20,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2024-11-02 12:39:20,707 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 12:39:20,707 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-11-02 12:39:20,707 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-02 12:39:20,708 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-02 12:39:20,709 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 12:39:20,709 INFO L85 PathProgramCache]: Analyzing trace with hash 340373643, now seen corresponding path program 1 times [2024-11-02 12:39:20,709 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-02 12:39:20,710 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [362067771] [2024-11-02 12:39:20,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 12:39:20,710 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-02 12:39:20,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 12:39:21,019 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 12:39:21,019 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-02 12:39:21,020 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [362067771] [2024-11-02 12:39:21,020 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [362067771] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-02 12:39:21,020 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [762820902] [2024-11-02 12:39:21,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 12:39:21,021 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-02 12:39:21,021 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d39e3588-c035-4606-a7ec-eb4d7e83bcb3/bin/utaipan-verify-DbMuA5NWw2/z3 [2024-11-02 12:39:21,024 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d39e3588-c035-4606-a7ec-eb4d7e83bcb3/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-02 12:39:21,025 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d39e3588-c035-4606-a7ec-eb4d7e83bcb3/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-02 12:39:21,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 12:39:21,134 INFO L255 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-11-02 12:39:21,140 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-02 12:39:21,218 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 12:39:21,220 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-02 12:39:21,255 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 12:39:21,258 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [762820902] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-02 12:39:21,258 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [860593262] [2024-11-02 12:39:21,285 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2024-11-02 12:39:21,285 INFO L166 IcfgInterpreter]: Building call graph [2024-11-02 12:39:21,289 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-02 12:39:21,295 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-02 12:39:21,296 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-02 12:39:23,325 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-02 12:39:23,523 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSifa [860593262] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-02 12:39:23,524 INFO L185 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2024-11-02 12:39:23,524 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [3, 3, 3] total 7 [2024-11-02 12:39:23,525 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1991917765] [2024-11-02 12:39:23,526 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-02 12:39:23,526 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-02 12:39:23,527 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-02 12:39:23,527 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-02 12:39:23,528 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-11-02 12:39:23,528 INFO L87 Difference]: Start difference. First operand 9 states and 10 transitions. Second operand has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 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 12:39:23,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-02 12:39:23,650 INFO L93 Difference]: Finished difference Result 13 states and 14 transitions. [2024-11-02 12:39:23,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-02 12:39:23,651 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 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) Word has length 8 [2024-11-02 12:39:23,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-02 12:39:23,653 INFO L225 Difference]: With dead ends: 13 [2024-11-02 12:39:23,653 INFO L226 Difference]: Without dead ends: 10 [2024-11-02 12:39:23,653 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-11-02 12:39:23,654 INFO L432 NwaCegarLoop]: 2 mSDtfsCounter, 0 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 8 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-02 12:39:23,655 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 8 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-02 12:39:23,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2024-11-02 12:39:23,660 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 10. [2024-11-02 12:39:23,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10 states, 9 states have (on average 1.2222222222222223) internal successors, (11), 9 states have internal predecessors, (11), 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 12:39:23,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 11 transitions. [2024-11-02 12:39:23,661 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 11 transitions. Word has length 8 [2024-11-02 12:39:23,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-02 12:39:23,662 INFO L471 AbstractCegarLoop]: Abstraction has 10 states and 11 transitions. [2024-11-02 12:39:23,663 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 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 12:39:23,663 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 11 transitions. [2024-11-02 12:39:23,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2024-11-02 12:39:23,665 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 12:39:23,665 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-02 12:39:23,685 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d39e3588-c035-4606-a7ec-eb4d7e83bcb3/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-02 12:39:23,865 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d39e3588-c035-4606-a7ec-eb4d7e83bcb3/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-02 12:39:23,866 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-02 12:39:23,867 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 12:39:23,867 INFO L85 PathProgramCache]: Analyzing trace with hash 1961607922, now seen corresponding path program 1 times [2024-11-02 12:39:23,867 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-02 12:39:23,867 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [256241833] [2024-11-02 12:39:23,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 12:39:23,868 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-02 12:39:23,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 12:39:24,075 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 12:39:24,075 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-02 12:39:24,075 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [256241833] [2024-11-02 12:39:24,075 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [256241833] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-02 12:39:24,076 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1410715529] [2024-11-02 12:39:24,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 12:39:24,076 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-02 12:39:24,076 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d39e3588-c035-4606-a7ec-eb4d7e83bcb3/bin/utaipan-verify-DbMuA5NWw2/z3 [2024-11-02 12:39:24,080 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d39e3588-c035-4606-a7ec-eb4d7e83bcb3/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-02 12:39:24,082 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d39e3588-c035-4606-a7ec-eb4d7e83bcb3/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-02 12:39:24,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 12:39:24,189 INFO L255 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-11-02 12:39:24,190 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-02 12:39:24,209 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 12:39:24,209 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-02 12:39:24,232 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 12:39:24,232 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1410715529] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-02 12:39:24,233 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [960586968] [2024-11-02 12:39:24,235 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2024-11-02 12:39:24,235 INFO L166 IcfgInterpreter]: Building call graph [2024-11-02 12:39:24,235 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-02 12:39:24,236 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-02 12:39:24,236 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-02 12:39:25,655 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-02 12:39:25,873 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '197#(and (<= 1 |#StackHeapBarrier|) (or (not (= (select (select |#memory_$Pointer$.offset| |ULTIMATE.start_main_~#s~0#1.base|) 0) 0)) (not (= (select (select |#memory_$Pointer$.base| |ULTIMATE.start_main_~#s~0#1.base|) 0) 0))) (<= 2 |ULTIMATE.start_main_~#s~0#1.base|))' at error location [2024-11-02 12:39:25,874 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-02 12:39:25,874 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-02 12:39:25,874 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 4 [2024-11-02 12:39:25,874 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [191206942] [2024-11-02 12:39:25,875 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-02 12:39:25,875 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-02 12:39:25,875 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-02 12:39:25,876 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-02 12:39:25,876 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-11-02 12:39:25,877 INFO L87 Difference]: Start difference. First operand 10 states and 11 transitions. Second operand has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-02 12:39:25,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-02 12:39:25,961 INFO L93 Difference]: Finished difference Result 18 states and 20 transitions. [2024-11-02 12:39:25,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-02 12:39:25,962 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2024-11-02 12:39:25,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-02 12:39:25,963 INFO L225 Difference]: With dead ends: 18 [2024-11-02 12:39:25,963 INFO L226 Difference]: Without dead ends: 13 [2024-11-02 12:39:25,963 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-11-02 12:39:25,964 INFO L432 NwaCegarLoop]: 3 mSDtfsCounter, 2 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 9 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 12:39:25,965 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 9 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-02 12:39:25,966 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2024-11-02 12:39:25,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2024-11-02 12:39:25,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13 states, 12 states have (on average 1.1666666666666667) internal successors, (14), 12 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-02 12:39:25,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 14 transitions. [2024-11-02 12:39:25,969 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 14 transitions. Word has length 9 [2024-11-02 12:39:25,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-02 12:39:25,970 INFO L471 AbstractCegarLoop]: Abstraction has 13 states and 14 transitions. [2024-11-02 12:39:25,970 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-02 12:39:25,970 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 14 transitions. [2024-11-02 12:39:25,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2024-11-02 12:39:25,970 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 12:39:25,971 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1] [2024-11-02 12:39:25,993 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d39e3588-c035-4606-a7ec-eb4d7e83bcb3/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-11-02 12:39:26,171 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d39e3588-c035-4606-a7ec-eb4d7e83bcb3/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-02 12:39:26,172 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-02 12:39:26,172 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 12:39:26,172 INFO L85 PathProgramCache]: Analyzing trace with hash 282598546, now seen corresponding path program 2 times [2024-11-02 12:39:26,173 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-02 12:39:26,173 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1032195401] [2024-11-02 12:39:26,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 12:39:26,173 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-02 12:39:26,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 12:39:26,335 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-02 12:39:26,335 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-02 12:39:26,336 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1032195401] [2024-11-02 12:39:26,336 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1032195401] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-02 12:39:26,336 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [60372848] [2024-11-02 12:39:26,336 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-02 12:39:26,336 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-02 12:39:26,337 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d39e3588-c035-4606-a7ec-eb4d7e83bcb3/bin/utaipan-verify-DbMuA5NWw2/z3 [2024-11-02 12:39:26,339 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d39e3588-c035-4606-a7ec-eb4d7e83bcb3/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-02 12:39:26,340 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d39e3588-c035-4606-a7ec-eb4d7e83bcb3/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-02 12:39:26,461 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-02 12:39:26,461 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-02 12:39:26,462 INFO L255 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-11-02 12:39:26,464 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-02 12:39:26,506 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-02 12:39:26,507 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-02 12:39:26,548 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-02 12:39:26,548 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [60372848] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-02 12:39:26,548 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1755558678] [2024-11-02 12:39:26,550 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2024-11-02 12:39:26,551 INFO L166 IcfgInterpreter]: Building call graph [2024-11-02 12:39:26,551 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-02 12:39:26,551 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-02 12:39:26,552 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-02 12:39:31,368 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-02 12:39:35,828 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '318#(or (exists ((|v_ULTIMATE.start_main_~#s~0#1.offset_29| Int)) (not (= (select (select |#memory_$Pointer$.offset| |ULTIMATE.start_main_~#s~0#1.base|) |v_ULTIMATE.start_main_~#s~0#1.offset_29|) 0))) (exists ((|v_ULTIMATE.start_main_~#s~0#1.offset_29| Int)) (not (= (select (select |#memory_$Pointer$.base| |ULTIMATE.start_main_~#s~0#1.base|) |v_ULTIMATE.start_main_~#s~0#1.offset_29|) 0))))' at error location [2024-11-02 12:39:35,828 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-02 12:39:35,828 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-02 12:39:35,828 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 6 [2024-11-02 12:39:35,829 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2001295794] [2024-11-02 12:39:35,829 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-02 12:39:35,829 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-02 12:39:35,829 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-02 12:39:35,830 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-02 12:39:35,831 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=80, Unknown=2, NotChecked=0, Total=110 [2024-11-02 12:39:35,832 INFO L87 Difference]: Start difference. First operand 13 states and 14 transitions. Second operand has 7 states, 7 states have (on average 2.142857142857143) internal successors, (15), 6 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 12:39:35,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-02 12:39:35,987 INFO L93 Difference]: Finished difference Result 17 states and 18 transitions. [2024-11-02 12:39:35,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-02 12:39:35,988 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.142857142857143) internal successors, (15), 6 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) Word has length 12 [2024-11-02 12:39:35,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-02 12:39:35,989 INFO L225 Difference]: With dead ends: 17 [2024-11-02 12:39:35,989 INFO L226 Difference]: Without dead ends: 14 [2024-11-02 12:39:35,989 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 27 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=28, Invalid=80, Unknown=2, NotChecked=0, Total=110 [2024-11-02 12:39:35,990 INFO L432 NwaCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 14 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-02 12:39:35,990 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 14 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-02 12:39:35,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2024-11-02 12:39:35,994 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2024-11-02 12:39:35,994 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 12:39:35,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 15 transitions. [2024-11-02 12:39:35,995 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 15 transitions. Word has length 12 [2024-11-02 12:39:35,995 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-02 12:39:35,995 INFO L471 AbstractCegarLoop]: Abstraction has 14 states and 15 transitions. [2024-11-02 12:39:35,995 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.142857142857143) internal successors, (15), 6 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 12:39:35,996 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 15 transitions. [2024-11-02 12:39:35,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2024-11-02 12:39:35,996 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 12:39:35,996 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1] [2024-11-02 12:39:36,012 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d39e3588-c035-4606-a7ec-eb4d7e83bcb3/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-11-02 12:39:36,197 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d39e3588-c035-4606-a7ec-eb4d7e83bcb3/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-02 12:39:36,197 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-02 12:39:36,198 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 12:39:36,198 INFO L85 PathProgramCache]: Analyzing trace with hash 170579915, now seen corresponding path program 3 times [2024-11-02 12:39:36,198 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-02 12:39:36,198 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1414266836] [2024-11-02 12:39:36,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 12:39:36,199 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-02 12:39:36,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 12:39:39,295 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-02 12:39:39,296 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-02 12:39:39,296 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1414266836] [2024-11-02 12:39:39,296 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1414266836] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-02 12:39:39,296 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [214896711] [2024-11-02 12:39:39,296 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-02 12:39:39,296 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-02 12:39:39,297 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d39e3588-c035-4606-a7ec-eb4d7e83bcb3/bin/utaipan-verify-DbMuA5NWw2/z3 [2024-11-02 12:39:39,299 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d39e3588-c035-4606-a7ec-eb4d7e83bcb3/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-02 12:39:39,306 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d39e3588-c035-4606-a7ec-eb4d7e83bcb3/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-02 12:39:40,332 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-02 12:39:40,332 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-02 12:39:40,335 INFO L255 TraceCheckSpWp]: Trace formula consists of 225 conjuncts, 60 conjuncts are in the unsatisfiable core [2024-11-02 12:39:40,342 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-02 12:39:40,505 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2024-11-02 12:39:40,719 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 15 [2024-11-02 12:39:40,746 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 7 [2024-11-02 12:39:40,983 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-02 12:39:40,983 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2024-11-02 12:39:41,288 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 32 [2024-11-02 12:39:41,303 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-02 12:39:41,311 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 33 [2024-11-02 12:39:41,323 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-02 12:39:41,330 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 32 [2024-11-02 12:39:41,351 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 18 [2024-11-02 12:39:41,378 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 1 [2024-11-02 12:39:41,398 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 26 treesize of output 15 [2024-11-02 12:39:41,441 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 15 [2024-11-02 12:39:42,826 INFO L349 Elim1Store]: treesize reduction 222, result has 30.4 percent of original size [2024-11-02 12:39:42,827 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 1 disjoint index pairs (out of 15 index pairs), introduced 9 new quantified variables, introduced 21 case distinctions, treesize of input 256 treesize of output 185 [2024-11-02 12:39:42,874 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-02 12:39:42,890 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-02 12:39:43,019 INFO L349 Elim1Store]: treesize reduction 72, result has 17.2 percent of original size [2024-11-02 12:39:43,020 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 76 treesize of output 56 [2024-11-02 12:39:47,853 INFO L349 Elim1Store]: treesize reduction 44, result has 91.1 percent of original size [2024-11-02 12:39:47,854 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 14 select indices, 14 select index equivalence classes, 1 disjoint index pairs (out of 91 index pairs), introduced 19 new quantified variables, introduced 90 case distinctions, treesize of input 407 treesize of output 714 [2024-11-02 12:39:47,935 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 12:39:48,409 INFO L224 Elim1Store]: Index analysis took 430 ms