./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/nla-digbench-scaling/prodbin-ll_valuebound100.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 4fc63b2a Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d06f91ca-07af-4db3-8f04-3594c7f75ff5/bin/utaipan-verify-DbMuA5NWw2/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d06f91ca-07af-4db3-8f04-3594c7f75ff5/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_d06f91ca-07af-4db3-8f04-3594c7f75ff5/bin/utaipan-verify-DbMuA5NWw2/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d06f91ca-07af-4db3-8f04-3594c7f75ff5/bin/utaipan-verify-DbMuA5NWw2/config/TaipanReach.xml -i ../../sv-benchmarks/c/nla-digbench-scaling/prodbin-ll_valuebound100.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d06f91ca-07af-4db3-8f04-3594c7f75ff5/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_d06f91ca-07af-4db3-8f04-3594c7f75ff5/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 8bd25fcd8e8d81d9ce03f11651b22e7d6f0ec0da3b511f7ebe00128a9109f319 --- Real Ultimate output --- This is Ultimate 0.2.5-dev-4fc63b2 [2024-11-02 11:25:41,935 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-02 11:25:42,034 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d06f91ca-07af-4db3-8f04-3594c7f75ff5/bin/utaipan-verify-DbMuA5NWw2/config/svcomp-Reach-32bit-Taipan_Default.epf [2024-11-02 11:25:42,039 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-02 11:25:42,040 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-02 11:25:42,074 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-02 11:25:42,074 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-02 11:25:42,075 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-02 11:25:42,075 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-02 11:25:42,079 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-02 11:25:42,079 INFO L153 SettingsManager]: * User list type=DISABLED [2024-11-02 11:25:42,080 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2024-11-02 11:25:42,080 INFO L153 SettingsManager]: * Explicit value domain=true [2024-11-02 11:25:42,080 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2024-11-02 11:25:42,081 INFO L153 SettingsManager]: * Octagon Domain=false [2024-11-02 11:25:42,081 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2024-11-02 11:25:42,081 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2024-11-02 11:25:42,085 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2024-11-02 11:25:42,085 INFO L153 SettingsManager]: * Interval Domain=false [2024-11-02 11:25:42,086 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2024-11-02 11:25:42,086 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2024-11-02 11:25:42,086 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2024-11-02 11:25:42,087 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-02 11:25:42,087 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-02 11:25:42,088 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-02 11:25:42,088 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-02 11:25:42,088 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-02 11:25:42,088 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-02 11:25:42,089 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-02 11:25:42,089 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-02 11:25:42,089 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-02 11:25:42,089 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-02 11:25:42,090 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-02 11:25:42,093 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-02 11:25:42,093 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-02 11:25:42,093 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-02 11:25:42,094 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-02 11:25:42,094 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-02 11:25:42,094 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2024-11-02 11:25:42,094 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-02 11:25:42,095 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-02 11:25:42,096 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-02 11:25:42,096 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2024-11-02 11:25:42,096 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-02 11:25:42,096 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-02 11:25:42,097 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2024-11-02 11:25:42,097 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-02 11:25:42,097 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_d06f91ca-07af-4db3-8f04-3594c7f75ff5/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d06f91ca-07af-4db3-8f04-3594c7f75ff5/bin/utaipan-verify-DbMuA5NWw2 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 8bd25fcd8e8d81d9ce03f11651b22e7d6f0ec0da3b511f7ebe00128a9109f319 [2024-11-02 11:25:42,439 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-02 11:25:42,471 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-02 11:25:42,475 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-02 11:25:42,477 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-02 11:25:42,478 INFO L274 PluginConnector]: CDTParser initialized [2024-11-02 11:25:42,479 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d06f91ca-07af-4db3-8f04-3594c7f75ff5/bin/utaipan-verify-DbMuA5NWw2/../../sv-benchmarks/c/nla-digbench-scaling/prodbin-ll_valuebound100.c Unable to find full path for "g++" [2024-11-02 11:25:44,701 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-02 11:25:44,944 INFO L384 CDTParser]: Found 1 translation units. [2024-11-02 11:25:44,948 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d06f91ca-07af-4db3-8f04-3594c7f75ff5/sv-benchmarks/c/nla-digbench-scaling/prodbin-ll_valuebound100.c [2024-11-02 11:25:44,957 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d06f91ca-07af-4db3-8f04-3594c7f75ff5/bin/utaipan-verify-DbMuA5NWw2/data/ee7c0bc69/e965337285b14a508ceb9d7aa21f4c59/FLAG1087776ee [2024-11-02 11:25:44,976 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d06f91ca-07af-4db3-8f04-3594c7f75ff5/bin/utaipan-verify-DbMuA5NWw2/data/ee7c0bc69/e965337285b14a508ceb9d7aa21f4c59 [2024-11-02 11:25:44,979 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-02 11:25:44,982 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-02 11:25:44,985 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-02 11:25:44,986 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-02 11:25:44,991 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-02 11:25:44,992 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 11:25:44" (1/1) ... [2024-11-02 11:25:44,996 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@765a60e7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:25:44, skipping insertion in model container [2024-11-02 11:25:44,996 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 11:25:44" (1/1) ... [2024-11-02 11:25:45,022 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-02 11:25:45,331 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_d06f91ca-07af-4db3-8f04-3594c7f75ff5/sv-benchmarks/c/nla-digbench-scaling/prodbin-ll_valuebound100.c[537,550] [2024-11-02 11:25:45,371 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-02 11:25:45,387 INFO L200 MainTranslator]: Completed pre-run [2024-11-02 11:25:45,404 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_d06f91ca-07af-4db3-8f04-3594c7f75ff5/sv-benchmarks/c/nla-digbench-scaling/prodbin-ll_valuebound100.c[537,550] [2024-11-02 11:25:45,417 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-02 11:25:45,440 INFO L204 MainTranslator]: Completed translation [2024-11-02 11:25:45,440 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:25:45 WrapperNode [2024-11-02 11:25:45,440 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-02 11:25:45,442 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-02 11:25:45,442 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-02 11:25:45,442 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-02 11:25:45,450 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:25:45" (1/1) ... [2024-11-02 11:25:45,459 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:25:45" (1/1) ... [2024-11-02 11:25:45,479 INFO L138 Inliner]: procedures = 14, calls = 12, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 43 [2024-11-02 11:25:45,480 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-02 11:25:45,480 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-02 11:25:45,481 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-02 11:25:45,481 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-02 11:25:45,490 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:25:45" (1/1) ... [2024-11-02 11:25:45,491 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:25:45" (1/1) ... [2024-11-02 11:25:45,492 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:25:45" (1/1) ... [2024-11-02 11:25:45,492 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:25:45" (1/1) ... [2024-11-02 11:25:45,495 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:25:45" (1/1) ... [2024-11-02 11:25:45,498 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:25:45" (1/1) ... [2024-11-02 11:25:45,499 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:25:45" (1/1) ... [2024-11-02 11:25:45,500 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:25:45" (1/1) ... [2024-11-02 11:25:45,502 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-02 11:25:45,503 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-02 11:25:45,503 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-02 11:25:45,503 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-02 11:25:45,504 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:25:45" (1/1) ... [2024-11-02 11:25:45,510 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2024-11-02 11:25:45,523 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d06f91ca-07af-4db3-8f04-3594c7f75ff5/bin/utaipan-verify-DbMuA5NWw2/z3 [2024-11-02 11:25:45,554 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d06f91ca-07af-4db3-8f04-3594c7f75ff5/bin/utaipan-verify-DbMuA5NWw2/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2024-11-02 11:25:45,567 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d06f91ca-07af-4db3-8f04-3594c7f75ff5/bin/utaipan-verify-DbMuA5NWw2/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2024-11-02 11:25:45,599 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-02 11:25:45,599 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2024-11-02 11:25:45,600 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2024-11-02 11:25:45,600 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2024-11-02 11:25:45,600 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-02 11:25:45,600 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-02 11:25:45,601 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2024-11-02 11:25:45,601 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2024-11-02 11:25:45,687 INFO L238 CfgBuilder]: Building ICFG [2024-11-02 11:25:45,690 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-02 11:25:45,918 INFO L? ?]: Removed 6 outVars from TransFormulas that were not future-live. [2024-11-02 11:25:45,918 INFO L287 CfgBuilder]: Performing block encoding [2024-11-02 11:25:45,998 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-02 11:25:45,999 INFO L316 CfgBuilder]: Removed 1 assume(true) statements. [2024-11-02 11:25:45,999 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 11:25:45 BoogieIcfgContainer [2024-11-02 11:25:45,999 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-02 11:25:46,002 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-02 11:25:46,003 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-02 11:25:46,006 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-02 11:25:46,007 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.11 11:25:44" (1/3) ... [2024-11-02 11:25:46,007 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@283e208a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.11 11:25:46, skipping insertion in model container [2024-11-02 11:25:46,008 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:25:45" (2/3) ... [2024-11-02 11:25:46,008 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@283e208a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.11 11:25:46, skipping insertion in model container [2024-11-02 11:25:46,008 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 11:25:45" (3/3) ... [2024-11-02 11:25:46,009 INFO L112 eAbstractionObserver]: Analyzing ICFG prodbin-ll_valuebound100.c [2024-11-02 11:25:46,030 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-02 11:25:46,030 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-11-02 11:25:46,100 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-02 11:25:46,107 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;@1f57452f, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-02 11:25:46,108 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-11-02 11:25:46,112 INFO L276 IsEmpty]: Start isEmpty. Operand has 20 states, 11 states have (on average 1.3636363636363635) internal successors, (15), 12 states have internal predecessors, (15), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2024-11-02 11:25:46,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2024-11-02 11:25:46,122 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 11:25:46,123 INFO L215 NwaCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-02 11:25:46,123 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-02 11:25:46,128 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 11:25:46,128 INFO L85 PathProgramCache]: Analyzing trace with hash -419629030, now seen corresponding path program 1 times [2024-11-02 11:25:46,138 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-02 11:25:46,139 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1124084673] [2024-11-02 11:25:46,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 11:25:46,140 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-02 11:25:46,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-02 11:25:46,267 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [836861959] [2024-11-02 11:25:46,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 11:25:46,267 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-02 11:25:46,268 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d06f91ca-07af-4db3-8f04-3594c7f75ff5/bin/utaipan-verify-DbMuA5NWw2/z3 [2024-11-02 11:25:46,269 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d06f91ca-07af-4db3-8f04-3594c7f75ff5/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-02 11:25:46,270 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d06f91ca-07af-4db3-8f04-3594c7f75ff5/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-02 11:25:46,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 11:25:46,341 INFO L255 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 15 conjuncts are in the unsatisfiable core [2024-11-02 11:25:46,350 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-02 11:25:46,798 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-02 11:25:46,799 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-02 11:25:46,986 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-02 11:25:46,987 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-02 11:25:46,987 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1124084673] [2024-11-02 11:25:46,988 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-02 11:25:46,988 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [836861959] [2024-11-02 11:25:46,990 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [836861959] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-02 11:25:46,990 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-02 11:25:46,991 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [8] total 9 [2024-11-02 11:25:46,993 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [860451706] [2024-11-02 11:25:46,994 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-02 11:25:47,001 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-02 11:25:47,002 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-02 11:25:47,040 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-02 11:25:47,042 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-11-02 11:25:47,047 INFO L87 Difference]: Start difference. First operand has 20 states, 11 states have (on average 1.3636363636363635) internal successors, (15), 12 states have internal predecessors, (15), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Second operand has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2024-11-02 11:25:47,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-02 11:25:47,223 INFO L93 Difference]: Finished difference Result 39 states and 53 transitions. [2024-11-02 11:25:47,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-02 11:25:47,228 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), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 17 [2024-11-02 11:25:47,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-02 11:25:47,238 INFO L225 Difference]: With dead ends: 39 [2024-11-02 11:25:47,239 INFO L226 Difference]: Without dead ends: 25 [2024-11-02 11:25:47,245 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-11-02 11:25:47,249 INFO L432 NwaCegarLoop]: 15 mSDtfsCounter, 3 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-02 11:25:47,251 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 57 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-02 11:25:47,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2024-11-02 11:25:47,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 24. [2024-11-02 11:25:47,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 14 states have (on average 1.1428571428571428) internal successors, (16), 16 states have internal predecessors, (16), 6 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) [2024-11-02 11:25:47,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 27 transitions. [2024-11-02 11:25:47,312 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 27 transitions. Word has length 17 [2024-11-02 11:25:47,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-02 11:25:47,315 INFO L471 AbstractCegarLoop]: Abstraction has 24 states and 27 transitions. [2024-11-02 11:25:47,315 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), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2024-11-02 11:25:47,316 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 27 transitions. [2024-11-02 11:25:47,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2024-11-02 11:25:47,317 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 11:25:47,319 INFO L215 NwaCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-02 11:25:47,345 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d06f91ca-07af-4db3-8f04-3594c7f75ff5/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-11-02 11:25:47,524 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d06f91ca-07af-4db3-8f04-3594c7f75ff5/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-02 11:25:47,525 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-02 11:25:47,525 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 11:25:47,526 INFO L85 PathProgramCache]: Analyzing trace with hash -1592245763, now seen corresponding path program 1 times [2024-11-02 11:25:47,526 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-02 11:25:47,526 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [906174183] [2024-11-02 11:25:47,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 11:25:47,527 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-02 11:25:47,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 11:25:48,045 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-02 11:25:48,045 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-02 11:25:48,046 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [906174183] [2024-11-02 11:25:48,046 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [906174183] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-02 11:25:48,046 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-02 11:25:48,046 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-02 11:25:48,047 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1947829404] [2024-11-02 11:25:48,047 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-02 11:25:48,048 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-02 11:25:48,048 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-02 11:25:48,049 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-02 11:25:48,049 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-02 11:25:48,050 INFO L87 Difference]: Start difference. First operand 24 states and 27 transitions. Second operand has 5 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2024-11-02 11:25:48,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-02 11:25:48,120 INFO L93 Difference]: Finished difference Result 32 states and 35 transitions. [2024-11-02 11:25:48,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-02 11:25:48,122 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) Word has length 23 [2024-11-02 11:25:48,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-02 11:25:48,124 INFO L225 Difference]: With dead ends: 32 [2024-11-02 11:25:48,126 INFO L226 Difference]: Without dead ends: 25 [2024-11-02 11:25:48,127 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-02 11:25:48,129 INFO L432 NwaCegarLoop]: 14 mSDtfsCounter, 4 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-02 11:25:48,130 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 36 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-02 11:25:48,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2024-11-02 11:25:48,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2024-11-02 11:25:48,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 15 states have (on average 1.1333333333333333) internal successors, (17), 16 states have internal predecessors, (17), 6 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2024-11-02 11:25:48,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 28 transitions. [2024-11-02 11:25:48,147 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 28 transitions. Word has length 23 [2024-11-02 11:25:48,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-02 11:25:48,148 INFO L471 AbstractCegarLoop]: Abstraction has 25 states and 28 transitions. [2024-11-02 11:25:48,148 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2024-11-02 11:25:48,148 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 28 transitions. [2024-11-02 11:25:48,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2024-11-02 11:25:48,151 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 11:25:48,151 INFO L215 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-02 11:25:48,152 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-02 11:25:48,152 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-02 11:25:48,153 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 11:25:48,153 INFO L85 PathProgramCache]: Analyzing trace with hash -556494917, now seen corresponding path program 1 times [2024-11-02 11:25:48,153 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-02 11:25:48,154 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [198022079] [2024-11-02 11:25:48,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 11:25:48,156 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-02 11:25:48,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-02 11:25:48,203 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [488568814] [2024-11-02 11:25:48,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 11:25:48,203 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-02 11:25:48,204 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d06f91ca-07af-4db3-8f04-3594c7f75ff5/bin/utaipan-verify-DbMuA5NWw2/z3 [2024-11-02 11:25:48,206 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d06f91ca-07af-4db3-8f04-3594c7f75ff5/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-02 11:25:48,211 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d06f91ca-07af-4db3-8f04-3594c7f75ff5/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-02 11:25:48,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 11:25:48,291 INFO L255 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 26 conjuncts are in the unsatisfiable core [2024-11-02 11:25:48,295 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-02 11:25:52,094 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-02 11:25:52,094 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-02 11:25:58,687 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-02 11:25:58,688 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [198022079] [2024-11-02 11:25:58,688 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-02 11:25:58,689 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [488568814] [2024-11-02 11:25:58,689 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [488568814] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-02 11:25:58,689 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1276393947] [2024-11-02 11:25:58,715 INFO L159 IcfgInterpreter]: Started Sifa with 17 locations of interest [2024-11-02 11:25:58,715 INFO L166 IcfgInterpreter]: Building call graph [2024-11-02 11:25:58,721 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-02 11:25:58,728 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-02 11:25:58,729 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-02 11:25:59,932 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 28 for LOIs [2024-11-02 11:25:59,969 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 3 for LOIs [2024-11-02 11:25:59,970 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-02 11:26:04,855 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '448#(and (<= 1 |#StackHeapBarrier|) (= |__VERIFIER_assert_#in~cond| 0))' at error location [2024-11-02 11:26:04,855 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-02 11:26:04,855 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-11-02 11:26:04,856 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2024-11-02 11:26:04,856 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [958138964] [2024-11-02 11:26:04,856 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-11-02 11:26:04,857 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-11-02 11:26:04,857 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-02 11:26:04,858 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-11-02 11:26:04,860 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=750, Unknown=0, NotChecked=0, Total=870 [2024-11-02 11:26:04,860 INFO L87 Difference]: Start difference. First operand 25 states and 28 transitions. Second operand has 10 states, 9 states have (on average 1.5555555555555556) internal successors, (14), 8 states have internal predecessors, (14), 4 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2024-11-02 11:26:05,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-02 11:26:05,103 INFO L93 Difference]: Finished difference Result 34 states and 38 transitions. [2024-11-02 11:26:05,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-02 11:26:05,104 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 1.5555555555555556) internal successors, (14), 8 states have internal predecessors, (14), 4 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 24 [2024-11-02 11:26:05,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-02 11:26:05,105 INFO L225 Difference]: With dead ends: 34 [2024-11-02 11:26:05,106 INFO L226 Difference]: Without dead ends: 32 [2024-11-02 11:26:05,106 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 239 ImplicationChecksByTransitivity, 8.3s TimeCoverageRelationStatistics Valid=128, Invalid=802, Unknown=0, NotChecked=0, Total=930 [2024-11-02 11:26:05,108 INFO L432 NwaCegarLoop]: 11 mSDtfsCounter, 8 mSDsluCounter, 68 mSDsCounter, 0 mSdLazyCounter, 124 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 79 SdHoareTripleChecker+Invalid, 125 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 124 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-02 11:26:05,108 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 79 Invalid, 125 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 124 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-02 11:26:05,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2024-11-02 11:26:05,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 31. [2024-11-02 11:26:05,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 19 states have (on average 1.105263157894737) internal successors, (21), 21 states have internal predecessors, (21), 7 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (6), 5 states have call predecessors, (6), 6 states have call successors, (6) [2024-11-02 11:26:05,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 34 transitions. [2024-11-02 11:26:05,117 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 34 transitions. Word has length 24 [2024-11-02 11:26:05,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-02 11:26:05,118 INFO L471 AbstractCegarLoop]: Abstraction has 31 states and 34 transitions. [2024-11-02 11:26:05,118 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 1.5555555555555556) internal successors, (14), 8 states have internal predecessors, (14), 4 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2024-11-02 11:26:05,119 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 34 transitions. [2024-11-02 11:26:05,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2024-11-02 11:26:05,120 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 11:26:05,120 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-02 11:26:05,142 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d06f91ca-07af-4db3-8f04-3594c7f75ff5/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-11-02 11:26:05,321 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d06f91ca-07af-4db3-8f04-3594c7f75ff5/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-02 11:26:05,321 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-02 11:26:05,322 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 11:26:05,322 INFO L85 PathProgramCache]: Analyzing trace with hash 762174686, now seen corresponding path program 1 times [2024-11-02 11:26:05,322 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-02 11:26:05,323 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [313566491] [2024-11-02 11:26:05,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 11:26:05,323 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-02 11:26:05,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-02 11:26:05,365 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [857836607] [2024-11-02 11:26:05,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 11:26:05,365 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-02 11:26:05,366 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d06f91ca-07af-4db3-8f04-3594c7f75ff5/bin/utaipan-verify-DbMuA5NWw2/z3 [2024-11-02 11:26:05,368 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d06f91ca-07af-4db3-8f04-3594c7f75ff5/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-02 11:26:05,372 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d06f91ca-07af-4db3-8f04-3594c7f75ff5/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-02 11:26:05,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 11:26:05,437 INFO L255 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-11-02 11:26:05,439 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-02 11:26:05,614 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-11-02 11:26:05,615 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-02 11:26:05,764 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-02 11:26:05,765 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-02 11:26:05,765 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [313566491] [2024-11-02 11:26:05,766 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-02 11:26:05,766 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [857836607] [2024-11-02 11:26:05,766 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [857836607] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-02 11:26:05,766 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [221536151] [2024-11-02 11:26:05,769 INFO L159 IcfgInterpreter]: Started Sifa with 18 locations of interest [2024-11-02 11:26:05,770 INFO L166 IcfgInterpreter]: Building call graph [2024-11-02 11:26:05,770 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-02 11:26:05,770 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-02 11:26:05,771 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-02 11:26:06,846 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 26 for LOIs [2024-11-02 11:26:06,859 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 3 for LOIs [2024-11-02 11:26:06,861 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-02 11:26:09,708 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '753#(and (<= 1 |#StackHeapBarrier|) (= |__VERIFIER_assert_#in~cond| 0))' at error location [2024-11-02 11:26:09,708 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-02 11:26:09,708 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-02 11:26:09,708 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 7] total 14 [2024-11-02 11:26:09,709 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [234434175] [2024-11-02 11:26:09,709 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-02 11:26:09,709 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-11-02 11:26:09,710 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-02 11:26:09,710 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-11-02 11:26:09,711 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=696, Unknown=0, NotChecked=0, Total=812 [2024-11-02 11:26:09,712 INFO L87 Difference]: Start difference. First operand 31 states and 34 transitions. Second operand has 14 states, 11 states have (on average 2.272727272727273) internal successors, (25), 11 states have internal predecessors, (25), 4 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (9), 4 states have call predecessors, (9), 2 states have call successors, (9) [2024-11-02 11:26:09,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-02 11:26:09,867 INFO L93 Difference]: Finished difference Result 37 states and 39 transitions. [2024-11-02 11:26:09,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-02 11:26:09,868 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 11 states have (on average 2.272727272727273) internal successors, (25), 11 states have internal predecessors, (25), 4 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (9), 4 states have call predecessors, (9), 2 states have call successors, (9) Word has length 30 [2024-11-02 11:26:09,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-02 11:26:09,871 INFO L225 Difference]: With dead ends: 37 [2024-11-02 11:26:09,871 INFO L226 Difference]: Without dead ends: 30 [2024-11-02 11:26:09,872 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 214 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=124, Invalid=746, Unknown=0, NotChecked=0, Total=870 [2024-11-02 11:26:09,873 INFO L432 NwaCegarLoop]: 11 mSDtfsCounter, 5 mSDsluCounter, 70 mSDsCounter, 0 mSdLazyCounter, 116 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 81 SdHoareTripleChecker+Invalid, 118 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 116 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-02 11:26:09,874 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 81 Invalid, 118 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 116 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-02 11:26:09,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2024-11-02 11:26:09,881 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2024-11-02 11:26:09,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 19 states have (on average 1.0526315789473684) internal successors, (20), 20 states have internal predecessors, (20), 6 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (6), 5 states have call predecessors, (6), 6 states have call successors, (6) [2024-11-02 11:26:09,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 32 transitions. [2024-11-02 11:26:09,883 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 32 transitions. Word has length 30 [2024-11-02 11:26:09,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-02 11:26:09,883 INFO L471 AbstractCegarLoop]: Abstraction has 30 states and 32 transitions. [2024-11-02 11:26:09,884 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 11 states have (on average 2.272727272727273) internal successors, (25), 11 states have internal predecessors, (25), 4 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (9), 4 states have call predecessors, (9), 2 states have call successors, (9) [2024-11-02 11:26:09,884 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 32 transitions. [2024-11-02 11:26:09,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2024-11-02 11:26:09,885 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 11:26:09,885 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-02 11:26:09,910 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d06f91ca-07af-4db3-8f04-3594c7f75ff5/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-11-02 11:26:10,086 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d06f91ca-07af-4db3-8f04-3594c7f75ff5/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-02 11:26:10,086 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-02 11:26:10,087 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 11:26:10,087 INFO L85 PathProgramCache]: Analyzing trace with hash -583905030, now seen corresponding path program 2 times [2024-11-02 11:26:10,087 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-02 11:26:10,087 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [777520183] [2024-11-02 11:26:10,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 11:26:10,088 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-02 11:26:10,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-02 11:26:10,161 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1517135232] [2024-11-02 11:26:10,162 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-02 11:26:10,162 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-02 11:26:10,162 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d06f91ca-07af-4db3-8f04-3594c7f75ff5/bin/utaipan-verify-DbMuA5NWw2/z3 [2024-11-02 11:26:10,164 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d06f91ca-07af-4db3-8f04-3594c7f75ff5/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-02 11:26:10,172 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d06f91ca-07af-4db3-8f04-3594c7f75ff5/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-02 11:26:10,269 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-11-02 11:26:10,269 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-02 11:26:10,271 INFO L255 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 37 conjuncts are in the unsatisfiable core [2024-11-02 11:26:10,275 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-02 11:26:13,510 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-02 11:26:13,510 INFO L311 TraceCheckSpWp]: Computing backward predicates...