./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-examples/standard_sentinel-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version a0165632 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_7ca3b742-2d83-4782-bc4b-d038ce19c677/bin/utaipan-verify-YMUCfTKeje/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ca3b742-2d83-4782-bc4b-d038ce19c677/bin/utaipan-verify-YMUCfTKeje/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ca3b742-2d83-4782-bc4b-d038ce19c677/bin/utaipan-verify-YMUCfTKeje/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ca3b742-2d83-4782-bc4b-d038ce19c677/bin/utaipan-verify-YMUCfTKeje/config/TaipanReach.xml -i ../../sv-benchmarks/c/array-examples/standard_sentinel-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ca3b742-2d83-4782-bc4b-d038ce19c677/bin/utaipan-verify-YMUCfTKeje/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ca3b742-2d83-4782-bc4b-d038ce19c677/bin/utaipan-verify-YMUCfTKeje --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 590a845a219659d0ad58521e10c3551f2ec7e80ca70e994a8616abe765f6f296 --- Real Ultimate output --- This is Ultimate 0.2.5-dev-a016563 [2024-11-09 06:42:00,585 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-09 06:42:00,661 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ca3b742-2d83-4782-bc4b-d038ce19c677/bin/utaipan-verify-YMUCfTKeje/config/svcomp-Reach-32bit-Taipan_Default.epf [2024-11-09 06:42:00,665 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-09 06:42:00,666 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-09 06:42:00,690 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-09 06:42:00,691 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-09 06:42:00,691 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-09 06:42:00,692 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-09 06:42:00,692 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-09 06:42:00,692 INFO L153 SettingsManager]: * User list type=DISABLED [2024-11-09 06:42:00,693 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2024-11-09 06:42:00,693 INFO L153 SettingsManager]: * Explicit value domain=true [2024-11-09 06:42:00,693 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2024-11-09 06:42:00,695 INFO L153 SettingsManager]: * Octagon Domain=false [2024-11-09 06:42:00,695 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2024-11-09 06:42:00,697 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2024-11-09 06:42:00,698 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2024-11-09 06:42:00,698 INFO L153 SettingsManager]: * Interval Domain=false [2024-11-09 06:42:00,698 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2024-11-09 06:42:00,699 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2024-11-09 06:42:00,704 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2024-11-09 06:42:00,705 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-09 06:42:00,705 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-09 06:42:00,705 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-09 06:42:00,705 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-09 06:42:00,705 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-09 06:42:00,706 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-09 06:42:00,706 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-09 06:42:00,706 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-09 06:42:00,706 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-09 06:42:00,707 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-09 06:42:00,707 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-09 06:42:00,708 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-09 06:42:00,708 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-09 06:42:00,709 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-09 06:42:00,709 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-09 06:42:00,710 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-09 06:42:00,710 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2024-11-09 06:42:00,711 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-09 06:42:00,711 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-09 06:42:00,711 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-09 06:42:00,712 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2024-11-09 06:42:00,712 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-09 06:42:00,712 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-09 06:42:00,713 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2024-11-09 06:42:00,713 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-09 06:42:00,713 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_7ca3b742-2d83-4782-bc4b-d038ce19c677/bin/utaipan-verify-YMUCfTKeje/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ca3b742-2d83-4782-bc4b-d038ce19c677/bin/utaipan-verify-YMUCfTKeje Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 590a845a219659d0ad58521e10c3551f2ec7e80ca70e994a8616abe765f6f296 [2024-11-09 06:42:00,985 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-09 06:42:01,015 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-09 06:42:01,018 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-09 06:42:01,020 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-09 06:42:01,021 INFO L274 PluginConnector]: CDTParser initialized [2024-11-09 06:42:01,023 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ca3b742-2d83-4782-bc4b-d038ce19c677/bin/utaipan-verify-YMUCfTKeje/../../sv-benchmarks/c/array-examples/standard_sentinel-2.i Unable to find full path for "g++" [2024-11-09 06:42:03,055 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-09 06:42:03,270 INFO L384 CDTParser]: Found 1 translation units. [2024-11-09 06:42:03,271 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ca3b742-2d83-4782-bc4b-d038ce19c677/sv-benchmarks/c/array-examples/standard_sentinel-2.i [2024-11-09 06:42:03,281 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ca3b742-2d83-4782-bc4b-d038ce19c677/bin/utaipan-verify-YMUCfTKeje/data/69730b057/ec7dc1230a09457abbb645dc604536d1/FLAG9bbd4b949 [2024-11-09 06:42:03,301 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ca3b742-2d83-4782-bc4b-d038ce19c677/bin/utaipan-verify-YMUCfTKeje/data/69730b057/ec7dc1230a09457abbb645dc604536d1 [2024-11-09 06:42:03,303 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-09 06:42:03,308 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-09 06:42:03,309 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-09 06:42:03,309 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-09 06:42:03,315 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-09 06:42:03,316 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.11 06:42:03" (1/1) ... [2024-11-09 06:42:03,318 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@59af6443 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 06:42:03, skipping insertion in model container [2024-11-09 06:42:03,319 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.11 06:42:03" (1/1) ... [2024-11-09 06:42:03,351 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-09 06:42:03,574 WARN L250 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_7ca3b742-2d83-4782-bc4b-d038ce19c677/sv-benchmarks/c/array-examples/standard_sentinel-2.i[852,865] [2024-11-09 06:42:03,592 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-09 06:42:03,604 INFO L200 MainTranslator]: Completed pre-run [2024-11-09 06:42:03,618 WARN L250 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_7ca3b742-2d83-4782-bc4b-d038ce19c677/sv-benchmarks/c/array-examples/standard_sentinel-2.i[852,865] [2024-11-09 06:42:03,624 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-09 06:42:03,643 INFO L204 MainTranslator]: Completed translation [2024-11-09 06:42:03,643 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 06:42:03 WrapperNode [2024-11-09 06:42:03,643 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-09 06:42:03,645 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-09 06:42:03,645 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-09 06:42:03,645 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-09 06:42:03,653 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 06:42:03" (1/1) ... [2024-11-09 06:42:03,662 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 06:42:03" (1/1) ... [2024-11-09 06:42:03,678 INFO L138 Inliner]: procedures = 16, calls = 13, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 52 [2024-11-09 06:42:03,679 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-09 06:42:03,679 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-09 06:42:03,680 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-09 06:42:03,680 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-09 06:42:03,688 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 06:42:03" (1/1) ... [2024-11-09 06:42:03,689 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 06:42:03" (1/1) ... [2024-11-09 06:42:03,690 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 06:42:03" (1/1) ... [2024-11-09 06:42:03,690 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 06:42:03" (1/1) ... [2024-11-09 06:42:03,695 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 06:42:03" (1/1) ... [2024-11-09 06:42:03,699 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 06:42:03" (1/1) ... [2024-11-09 06:42:03,700 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 06:42:03" (1/1) ... [2024-11-09 06:42:03,701 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 06:42:03" (1/1) ... [2024-11-09 06:42:03,703 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-09 06:42:03,707 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-09 06:42:03,708 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-09 06:42:03,708 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-09 06:42:03,709 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 06:42:03" (1/1) ... [2024-11-09 06:42:03,716 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2024-11-09 06:42:03,727 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ca3b742-2d83-4782-bc4b-d038ce19c677/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 06:42:03,740 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ca3b742-2d83-4782-bc4b-d038ce19c677/bin/utaipan-verify-YMUCfTKeje/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2024-11-09 06:42:03,744 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ca3b742-2d83-4782-bc4b-d038ce19c677/bin/utaipan-verify-YMUCfTKeje/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2024-11-09 06:42:03,778 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-09 06:42:03,778 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2024-11-09 06:42:03,779 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-11-09 06:42:03,781 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2024-11-09 06:42:03,781 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-09 06:42:03,781 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-09 06:42:03,781 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2024-11-09 06:42:03,781 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-11-09 06:42:03,872 INFO L238 CfgBuilder]: Building ICFG [2024-11-09 06:42:03,875 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-09 06:42:04,082 INFO L? ?]: Removed 11 outVars from TransFormulas that were not future-live. [2024-11-09 06:42:04,082 INFO L287 CfgBuilder]: Performing block encoding [2024-11-09 06:42:04,131 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-09 06:42:04,131 INFO L316 CfgBuilder]: Removed 1 assume(true) statements. [2024-11-09 06:42:04,132 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.11 06:42:04 BoogieIcfgContainer [2024-11-09 06:42:04,132 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-09 06:42:04,134 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-09 06:42:04,135 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-09 06:42:04,139 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-09 06:42:04,140 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.11 06:42:03" (1/3) ... [2024-11-09 06:42:04,142 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3ef7e493 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.11 06:42:04, skipping insertion in model container [2024-11-09 06:42:04,142 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 06:42:03" (2/3) ... [2024-11-09 06:42:04,143 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3ef7e493 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.11 06:42:04, skipping insertion in model container [2024-11-09 06:42:04,143 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.11 06:42:04" (3/3) ... [2024-11-09 06:42:04,145 INFO L112 eAbstractionObserver]: Analyzing ICFG standard_sentinel-2.i [2024-11-09 06:42:04,165 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-09 06:42:04,166 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-11-09 06:42:04,246 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-09 06:42:04,256 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;@78f348dc, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-09 06:42:04,257 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-11-09 06:42:04,263 INFO L276 IsEmpty]: Start isEmpty. Operand has 14 states, 12 states have (on average 1.5833333333333333) internal successors, (19), 13 states have internal predecessors, (19), 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) [2024-11-09 06:42:04,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2024-11-09 06:42:04,275 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 06:42:04,276 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 06:42:04,277 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 06:42:04,284 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 06:42:04,286 INFO L85 PathProgramCache]: Analyzing trace with hash -1466682205, now seen corresponding path program 1 times [2024-11-09 06:42:04,296 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 06:42:04,297 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1807801835] [2024-11-09 06:42:04,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:42:04,298 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 06:42:04,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:42:04,520 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 06:42:04,521 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 06:42:04,522 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1807801835] [2024-11-09 06:42:04,523 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1807801835] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 06:42:04,523 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 06:42:04,523 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-09 06:42:04,525 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [999850587] [2024-11-09 06:42:04,526 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 06:42:04,531 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-09 06:42:04,531 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 06:42:04,553 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-09 06:42:04,554 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-09 06:42:04,556 INFO L87 Difference]: Start difference. First operand has 14 states, 12 states have (on average 1.5833333333333333) internal successors, (19), 13 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 2 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) [2024-11-09 06:42:04,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 06:42:04,604 INFO L93 Difference]: Finished difference Result 27 states and 37 transitions. [2024-11-09 06:42:04,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-09 06:42:04,613 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 2 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 [2024-11-09 06:42:04,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 06:42:04,622 INFO L225 Difference]: With dead ends: 27 [2024-11-09 06:42:04,622 INFO L226 Difference]: Without dead ends: 13 [2024-11-09 06:42:04,625 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 [2024-11-09 06:42:04,629 INFO L432 NwaCegarLoop]: 13 mSDtfsCounter, 1 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-09 06:42:04,630 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 23 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-09 06:42:04,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2024-11-09 06:42:04,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2024-11-09 06:42:04,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13 states, 12 states have (on average 1.25) internal successors, (15), 12 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) [2024-11-09 06:42:04,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 15 transitions. [2024-11-09 06:42:04,663 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 15 transitions. Word has length 8 [2024-11-09 06:42:04,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 06:42:04,663 INFO L471 AbstractCegarLoop]: Abstraction has 13 states and 15 transitions. [2024-11-09 06:42:04,664 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 2 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) [2024-11-09 06:42:04,664 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 15 transitions. [2024-11-09 06:42:04,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2024-11-09 06:42:04,665 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 06:42:04,665 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 06:42:04,665 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-09 06:42:04,665 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 06:42:04,666 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 06:42:04,666 INFO L85 PathProgramCache]: Analyzing trace with hash -1259613916, now seen corresponding path program 1 times [2024-11-09 06:42:04,667 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 06:42:04,667 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [811328325] [2024-11-09 06:42:04,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:42:04,667 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 06:42:04,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:42:04,825 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 06:42:04,826 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 06:42:04,826 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [811328325] [2024-11-09 06:42:04,826 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [811328325] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 06:42:04,826 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [883629711] [2024-11-09 06:42:04,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:42:04,827 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 06:42:04,827 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ca3b742-2d83-4782-bc4b-d038ce19c677/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 06:42:04,829 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ca3b742-2d83-4782-bc4b-d038ce19c677/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 06:42:04,834 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ca3b742-2d83-4782-bc4b-d038ce19c677/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-09 06:42:04,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:42:04,921 INFO L255 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-11-09 06:42:04,928 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 06:42:04,989 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 06:42:04,989 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 06:42:05,035 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 06:42:05,036 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [883629711] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 06:42:05,037 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [369533696] [2024-11-09 06:42:05,062 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2024-11-09 06:42:05,062 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 06:42:05,066 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 06:42:05,073 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 06:42:05,074 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 06:42:05,767 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 06:42:06,122 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSifa [369533696] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 06:42:06,123 INFO L185 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2024-11-09 06:42:06,123 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [3, 3, 3] total 13 [2024-11-09 06:42:06,124 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1369330439] [2024-11-09 06:42:06,125 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 06:42:06,125 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-11-09 06:42:06,126 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 06:42:06,126 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-11-09 06:42:06,127 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2024-11-09 06:42:06,127 INFO L87 Difference]: Start difference. First operand 13 states and 15 transitions. Second operand has 9 states, 9 states have (on average 1.2222222222222223) internal successors, (11), 8 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) [2024-11-09 06:42:06,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 06:42:06,249 INFO L93 Difference]: Finished difference Result 19 states and 21 transitions. [2024-11-09 06:42:06,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-09 06:42:06,250 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 1.2222222222222223) internal successors, (11), 8 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) Word has length 11 [2024-11-09 06:42:06,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 06:42:06,251 INFO L225 Difference]: With dead ends: 19 [2024-11-09 06:42:06,251 INFO L226 Difference]: Without dead ends: 15 [2024-11-09 06:42:06,251 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2024-11-09 06:42:06,254 INFO L432 NwaCegarLoop]: 3 mSDtfsCounter, 5 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 59 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-09 06:42:06,255 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 17 Invalid, 59 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 59 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-09 06:42:06,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2024-11-09 06:42:06,262 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2024-11-09 06:42:06,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 14 states have (on average 1.2142857142857142) internal successors, (17), 14 states have internal predecessors, (17), 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) [2024-11-09 06:42:06,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 17 transitions. [2024-11-09 06:42:06,264 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 17 transitions. Word has length 11 [2024-11-09 06:42:06,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 06:42:06,265 INFO L471 AbstractCegarLoop]: Abstraction has 15 states and 17 transitions. [2024-11-09 06:42:06,265 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 1.2222222222222223) internal successors, (11), 8 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) [2024-11-09 06:42:06,266 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 17 transitions. [2024-11-09 06:42:06,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2024-11-09 06:42:06,266 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 06:42:06,266 INFO L215 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 06:42:06,287 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ca3b742-2d83-4782-bc4b-d038ce19c677/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-09 06:42:06,471 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ca3b742-2d83-4782-bc4b-d038ce19c677/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 06:42:06,471 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 06:42:06,472 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 06:42:06,472 INFO L85 PathProgramCache]: Analyzing trace with hash 740478975, now seen corresponding path program 1 times [2024-11-09 06:42:06,472 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 06:42:06,473 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1635928650] [2024-11-09 06:42:06,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:42:06,473 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 06:42:06,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:42:06,617 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-09 06:42:06,618 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 06:42:06,619 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1635928650] [2024-11-09 06:42:06,620 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1635928650] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 06:42:06,620 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1727619681] [2024-11-09 06:42:06,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:42:06,622 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 06:42:06,623 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ca3b742-2d83-4782-bc4b-d038ce19c677/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 06:42:06,625 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ca3b742-2d83-4782-bc4b-d038ce19c677/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 06:42:06,628 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ca3b742-2d83-4782-bc4b-d038ce19c677/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-09 06:42:06,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:42:06,698 INFO L255 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-11-09 06:42:06,699 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 06:42:06,716 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-09 06:42:06,717 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 06:42:06,743 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-09 06:42:06,743 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1727619681] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 06:42:06,744 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1574561280] [2024-11-09 06:42:06,746 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2024-11-09 06:42:06,748 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 06:42:06,748 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 06:42:06,749 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 06:42:06,749 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 06:42:07,156 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 06:42:07,494 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '264#(and (<= 1 |#StackHeapBarrier|) (<= 2 |ULTIMATE.start_main_~#a~0#1.base|) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (exists ((|v_ULTIMATE.start_main_~i~1#1_22| Int)) (and (<= 0 (+ (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) (* |v_ULTIMATE.start_main_~i~1#1_22| 4)) 2147483648)) (<= 1 |v_ULTIMATE.start_main_~i~1#1_22|) (<= (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) (* |v_ULTIMATE.start_main_~i~1#1_22| 4)) 2147483647))))' at error location [2024-11-09 06:42:07,495 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 06:42:07,495 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 06:42:07,495 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2024-11-09 06:42:07,495 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [424626725] [2024-11-09 06:42:07,496 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 06:42:07,496 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-09 06:42:07,496 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 06:42:07,497 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-09 06:42:07,497 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2024-11-09 06:42:07,498 INFO L87 Difference]: Start difference. First operand 15 states and 17 transitions. Second operand has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 6 states have internal predecessors, (19), 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) [2024-11-09 06:42:07,542 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 06:42:07,542 INFO L93 Difference]: Finished difference Result 30 states and 37 transitions. [2024-11-09 06:42:07,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-09 06:42:07,544 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 6 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2024-11-09 06:42:07,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 06:42:07,545 INFO L225 Difference]: With dead ends: 30 [2024-11-09 06:42:07,545 INFO L226 Difference]: Without dead ends: 20 [2024-11-09 06:42:07,545 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2024-11-09 06:42:07,546 INFO L432 NwaCegarLoop]: 9 mSDtfsCounter, 2 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-09 06:42:07,547 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 23 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-09 06:42:07,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2024-11-09 06:42:07,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2024-11-09 06:42:07,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 19 states have (on average 1.105263157894737) internal successors, (21), 19 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 06:42:07,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 21 transitions. [2024-11-09 06:42:07,557 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 21 transitions. Word has length 13 [2024-11-09 06:42:07,557 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 06:42:07,557 INFO L471 AbstractCegarLoop]: Abstraction has 20 states and 21 transitions. [2024-11-09 06:42:07,557 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 6 states have internal predecessors, (19), 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) [2024-11-09 06:42:07,558 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 21 transitions. [2024-11-09 06:42:07,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2024-11-09 06:42:07,558 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 06:42:07,559 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 06:42:07,579 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ca3b742-2d83-4782-bc4b-d038ce19c677/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-11-09 06:42:07,759 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ca3b742-2d83-4782-bc4b-d038ce19c677/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 06:42:07,760 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 06:42:07,760 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 06:42:07,760 INFO L85 PathProgramCache]: Analyzing trace with hash -1963242674, now seen corresponding path program 2 times [2024-11-09 06:42:07,760 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 06:42:07,760 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1019309431] [2024-11-09 06:42:07,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:42:07,761 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 06:42:07,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:42:07,953 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-09 06:42:07,954 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 06:42:07,954 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1019309431] [2024-11-09 06:42:07,954 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1019309431] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 06:42:07,955 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [312184415] [2024-11-09 06:42:07,955 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-09 06:42:07,955 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 06:42:07,955 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ca3b742-2d83-4782-bc4b-d038ce19c677/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 06:42:07,957 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ca3b742-2d83-4782-bc4b-d038ce19c677/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 06:42:07,959 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ca3b742-2d83-4782-bc4b-d038ce19c677/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-09 06:42:08,019 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-09 06:42:08,019 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 06:42:08,020 INFO L255 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 13 conjuncts are in the unsatisfiable core [2024-11-09 06:42:08,022 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 06:42:08,056 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 11 [2024-11-09 06:42:08,102 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-09 06:42:08,102 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 15 [2024-11-09 06:42:08,197 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-11-09 06:42:08,197 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 06:42:08,312 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-11-09 06:42:08,312 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [312184415] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 06:42:08,313 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1453569726] [2024-11-09 06:42:08,317 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2024-11-09 06:42:08,317 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 06:42:08,317 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 06:42:08,318 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 06:42:08,318 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 06:42:08,712 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 06:42:09,177 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '460#(and (<= 1 |#StackHeapBarrier|) (<= 2 |ULTIMATE.start_main_~#a~0#1.base|) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (exists ((|v_ULTIMATE.start_main_~i~1#1_30| Int)) (and (<= 1 |v_ULTIMATE.start_main_~i~1#1_30|) (<= 0 (+ (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) (* |v_ULTIMATE.start_main_~i~1#1_30| 4)) 2147483648)) (<= (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) (* |v_ULTIMATE.start_main_~i~1#1_30| 4)) 2147483647))))' at error location [2024-11-09 06:42:09,178 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 06:42:09,178 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 06:42:09,178 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 14 [2024-11-09 06:42:09,178 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [651206613] [2024-11-09 06:42:09,179 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 06:42:09,179 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-11-09 06:42:09,179 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 06:42:09,180 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-11-09 06:42:09,180 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=398, Unknown=0, NotChecked=0, Total=462 [2024-11-09 06:42:09,181 INFO L87 Difference]: Start difference. First operand 20 states and 21 transitions. Second operand has 14 states, 14 states have (on average 2.5714285714285716) internal successors, (36), 14 states have internal predecessors, (36), 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) [2024-11-09 06:42:09,389 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 06:42:09,389 INFO L93 Difference]: Finished difference Result 40 states and 44 transitions. [2024-11-09 06:42:09,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-11-09 06:42:09,390 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.5714285714285716) internal successors, (36), 14 states have internal predecessors, (36), 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 19 [2024-11-09 06:42:09,390 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 06:42:09,391 INFO L225 Difference]: With dead ends: 40 [2024-11-09 06:42:09,391 INFO L226 Difference]: Without dead ends: 27 [2024-11-09 06:42:09,391 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 40 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 124 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=87, Invalid=513, Unknown=0, NotChecked=0, Total=600 [2024-11-09 06:42:09,392 INFO L432 NwaCegarLoop]: 5 mSDtfsCounter, 3 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 73 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 74 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 73 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-09 06:42:09,393 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 38 Invalid, 74 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 73 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-09 06:42:09,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2024-11-09 06:42:09,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 26. [2024-11-09 06:42:09,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 25 states have (on average 1.08) internal successors, (27), 25 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 06:42:09,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 27 transitions. [2024-11-09 06:42:09,401 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 27 transitions. Word has length 19 [2024-11-09 06:42:09,401 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 06:42:09,401 INFO L471 AbstractCegarLoop]: Abstraction has 26 states and 27 transitions. [2024-11-09 06:42:09,401 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.5714285714285716) internal successors, (36), 14 states have internal predecessors, (36), 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) [2024-11-09 06:42:09,402 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 27 transitions. [2024-11-09 06:42:09,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2024-11-09 06:42:09,402 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 06:42:09,402 INFO L215 NwaCegarLoop]: trace histogram [5, 5, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 06:42:09,422 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ca3b742-2d83-4782-bc4b-d038ce19c677/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-11-09 06:42:09,603 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ca3b742-2d83-4782-bc4b-d038ce19c677/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 06:42:09,603 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 06:42:09,604 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 06:42:09,604 INFO L85 PathProgramCache]: Analyzing trace with hash 325691401, now seen corresponding path program 3 times [2024-11-09 06:42:09,604 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 06:42:09,604 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [768168399] [2024-11-09 06:42:09,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:42:09,604 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 06:42:09,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:42:09,837 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-09 06:42:09,837 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 06:42:09,838 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [768168399] [2024-11-09 06:42:09,838 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [768168399] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 06:42:09,838 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [221741367] [2024-11-09 06:42:09,838 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-09 06:42:09,838 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 06:42:09,839 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ca3b742-2d83-4782-bc4b-d038ce19c677/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 06:42:09,840 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ca3b742-2d83-4782-bc4b-d038ce19c677/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 06:42:09,842 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ca3b742-2d83-4782-bc4b-d038ce19c677/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-09 06:42:09,918 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-09 06:42:09,918 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 06:42:09,920 INFO L255 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-11-09 06:42:09,921 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 06:42:09,952 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-09 06:42:09,953 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 06:42:10,070 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-09 06:42:10,070 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [221741367] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 06:42:10,070 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [207939945] [2024-11-09 06:42:10,074 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2024-11-09 06:42:10,075 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 06:42:10,075 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 06:42:10,075 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 06:42:10,075 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 06:42:10,392 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 06:42:10,707 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '721#(and (<= 1 |#StackHeapBarrier|) (exists ((|v_ULTIMATE.start_main_~i~1#1_38| Int)) (and (<= (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) (* |v_ULTIMATE.start_main_~i~1#1_38| 4)) 2147483647) (<= 1 |v_ULTIMATE.start_main_~i~1#1_38|) (<= 0 (+ (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) (* |v_ULTIMATE.start_main_~i~1#1_38| 4)) 2147483648)))) (<= 2 |ULTIMATE.start_main_~#a~0#1.base|) (= |ULTIMATE.start_main_~#a~0#1.offset| 0))' at error location [2024-11-09 06:42:10,708 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 06:42:10,708 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 06:42:10,708 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 14 [2024-11-09 06:42:10,708 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [130458026] [2024-11-09 06:42:10,708 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 06:42:10,709 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-11-09 06:42:10,709 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 06:42:10,709 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-11-09 06:42:10,710 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=379, Unknown=0, NotChecked=0, Total=506 [2024-11-09 06:42:10,710 INFO L87 Difference]: Start difference. First operand 26 states and 27 transitions. Second operand has 15 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 14 states have internal predecessors, (35), 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) [2024-11-09 06:42:10,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 06:42:10,776 INFO L93 Difference]: Finished difference Result 54 states and 62 transitions. [2024-11-09 06:42:10,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-11-09 06:42:10,776 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 14 states have internal predecessors, (35), 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 25 [2024-11-09 06:42:10,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 06:42:10,777 INFO L225 Difference]: With dead ends: 54 [2024-11-09 06:42:10,777 INFO L226 Difference]: Without dead ends: 40 [2024-11-09 06:42:10,778 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 176 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=127, Invalid=379, Unknown=0, NotChecked=0, Total=506 [2024-11-09 06:42:10,778 INFO L432 NwaCegarLoop]: 9 mSDtfsCounter, 2 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 37 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 [2024-11-09 06:42:10,779 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 37 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-09 06:42:10,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2024-11-09 06:42:10,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2024-11-09 06:42:10,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 39 states have (on average 1.0512820512820513) internal successors, (41), 39 states have internal predecessors, (41), 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) [2024-11-09 06:42:10,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 41 transitions. [2024-11-09 06:42:10,789 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 41 transitions. Word has length 25 [2024-11-09 06:42:10,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 06:42:10,789 INFO L471 AbstractCegarLoop]: Abstraction has 40 states and 41 transitions. [2024-11-09 06:42:10,789 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 14 states have internal predecessors, (35), 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) [2024-11-09 06:42:10,789 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 41 transitions. [2024-11-09 06:42:10,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2024-11-09 06:42:10,790 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 06:42:10,790 INFO L215 NwaCegarLoop]: trace histogram [12, 12, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 06:42:10,811 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ca3b742-2d83-4782-bc4b-d038ce19c677/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-11-09 06:42:10,990 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ca3b742-2d83-4782-bc4b-d038ce19c677/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 06:42:10,991 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 06:42:10,991 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 06:42:10,992 INFO L85 PathProgramCache]: Analyzing trace with hash -1416717204, now seen corresponding path program 4 times [2024-11-09 06:42:10,992 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 06:42:10,992 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [829708827] [2024-11-09 06:42:10,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:42:10,992 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 06:42:11,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:42:11,372 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-09 06:42:11,372 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 06:42:11,373 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [829708827] [2024-11-09 06:42:11,373 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [829708827] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 06:42:11,373 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1490462538] [2024-11-09 06:42:11,373 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-09 06:42:11,373 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 06:42:11,373 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ca3b742-2d83-4782-bc4b-d038ce19c677/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 06:42:11,375 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ca3b742-2d83-4782-bc4b-d038ce19c677/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 06:42:11,377 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ca3b742-2d83-4782-bc4b-d038ce19c677/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-09 06:42:11,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:42:11,470 INFO L255 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-11-09 06:42:11,472 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 06:42:11,532 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-09 06:42:11,535 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 06:42:11,909 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-09 06:42:11,910 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1490462538] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 06:42:11,910 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1117474644] [2024-11-09 06:42:11,912 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2024-11-09 06:42:11,913 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 06:42:11,914 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 06:42:11,914 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 06:42:11,914 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 06:42:12,183 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 06:42:12,605 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1118#(and (<= 1 |#StackHeapBarrier|) (exists ((|v_ULTIMATE.start_main_~i~1#1_46| Int)) (and (<= 1 |v_ULTIMATE.start_main_~i~1#1_46|) (<= 0 (+ (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) (* |v_ULTIMATE.start_main_~i~1#1_46| 4)) 2147483648)) (<= (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) (* |v_ULTIMATE.start_main_~i~1#1_46| 4)) 2147483647))) (<= 2 |ULTIMATE.start_main_~#a~0#1.base|) (= |ULTIMATE.start_main_~#a~0#1.offset| 0))' at error location [2024-11-09 06:42:12,605 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 06:42:12,605 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 06:42:12,606 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 28 [2024-11-09 06:42:12,606 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1189452832] [2024-11-09 06:42:12,606 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 06:42:12,609 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2024-11-09 06:42:12,609 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 06:42:12,610 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2024-11-09 06:42:12,611 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=428, Invalid=904, Unknown=0, NotChecked=0, Total=1332 [2024-11-09 06:42:12,613 INFO L87 Difference]: Start difference. First operand 40 states and 41 transitions. Second operand has 29 states, 29 states have (on average 2.1724137931034484) internal successors, (63), 28 states have internal predecessors, (63), 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) [2024-11-09 06:42:12,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 06:42:12,796 INFO L93 Difference]: Finished difference Result 82 states and 97 transitions. [2024-11-09 06:42:12,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2024-11-09 06:42:12,797 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.1724137931034484) internal successors, (63), 28 states have internal predecessors, (63), 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 39 [2024-11-09 06:42:12,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 06:42:12,798 INFO L225 Difference]: With dead ends: 82 [2024-11-09 06:42:12,798 INFO L226 Difference]: Without dead ends: 68 [2024-11-09 06:42:12,799 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 94 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 372 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=428, Invalid=904, Unknown=0, NotChecked=0, Total=1332 [2024-11-09 06:42:12,800 INFO L432 NwaCegarLoop]: 9 mSDtfsCounter, 2 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 62 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 64 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 62 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-09 06:42:12,800 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 37 Invalid, 64 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 62 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-09 06:42:12,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2024-11-09 06:42:12,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 68. [2024-11-09 06:42:12,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 67 states have (on average 1.0298507462686568) internal successors, (69), 67 states have internal predecessors, (69), 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) [2024-11-09 06:42:12,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 69 transitions. [2024-11-09 06:42:12,819 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 69 transitions. Word has length 39 [2024-11-09 06:42:12,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 06:42:12,819 INFO L471 AbstractCegarLoop]: Abstraction has 68 states and 69 transitions. [2024-11-09 06:42:12,819 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.1724137931034484) internal successors, (63), 28 states have internal predecessors, (63), 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) [2024-11-09 06:42:12,820 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 69 transitions. [2024-11-09 06:42:12,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2024-11-09 06:42:12,821 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 06:42:12,821 INFO L215 NwaCegarLoop]: trace histogram [26, 26, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 06:42:12,842 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ca3b742-2d83-4782-bc4b-d038ce19c677/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-11-09 06:42:13,026 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ca3b742-2d83-4782-bc4b-d038ce19c677/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 06:42:13,026 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 06:42:13,026 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 06:42:13,027 INFO L85 PathProgramCache]: Analyzing trace with hash -274269838, now seen corresponding path program 5 times [2024-11-09 06:42:13,027 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 06:42:13,027 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [918105521] [2024-11-09 06:42:13,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:42:13,027 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 06:42:13,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:42:14,064 INFO L134 CoverageAnalysis]: Checked inductivity of 688 backedges. 0 proven. 676 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-09 06:42:14,064 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 06:42:14,064 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [918105521] [2024-11-09 06:42:14,064 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [918105521] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 06:42:14,065 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [683082996] [2024-11-09 06:42:14,065 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-09 06:42:14,065 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 06:42:14,065 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ca3b742-2d83-4782-bc4b-d038ce19c677/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 06:42:14,066 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ca3b742-2d83-4782-bc4b-d038ce19c677/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 06:42:14,068 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ca3b742-2d83-4782-bc4b-d038ce19c677/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-09 06:42:14,164 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-11-09 06:42:14,164 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 06:42:14,166 INFO L255 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 25 conjuncts are in the unsatisfiable core [2024-11-09 06:42:14,169 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 06:42:14,179 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 11 [2024-11-09 06:42:14,448 INFO L349 Elim1Store]: treesize reduction 8, result has 68.0 percent of original size [2024-11-09 06:42:14,448 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 39 treesize of output 31 [2024-11-09 06:42:14,646 INFO L134 CoverageAnalysis]: Checked inductivity of 688 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 676 trivial. 0 not checked. [2024-11-09 06:42:14,647 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 06:42:15,071 INFO L134 CoverageAnalysis]: Checked inductivity of 688 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 676 trivial. 0 not checked. [2024-11-09 06:42:15,071 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [683082996] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 06:42:15,071 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1022586696] [2024-11-09 06:42:15,073 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2024-11-09 06:42:15,073 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 06:42:15,074 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 06:42:15,074 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 06:42:15,074 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 06:42:15,317 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 06:42:15,916 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1782#(and (<= 1 |#StackHeapBarrier|) (exists ((|v_ULTIMATE.start_main_~i~1#1_58| Int)) (and (<= 1 |v_ULTIMATE.start_main_~i~1#1_58|) (<= (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) (* |v_ULTIMATE.start_main_~i~1#1_58| 4)) 2147483647) (<= 0 (+ (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) (* |v_ULTIMATE.start_main_~i~1#1_58| 4)) 2147483648)))) (<= 2 |ULTIMATE.start_main_~#a~0#1.base|) (= |ULTIMATE.start_main_~#a~0#1.offset| 0))' at error location [2024-11-09 06:42:15,916 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 06:42:15,916 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 06:42:15,916 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 10, 10] total 44 [2024-11-09 06:42:15,916 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [441664644] [2024-11-09 06:42:15,917 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 06:42:15,917 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2024-11-09 06:42:15,917 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 06:42:15,918 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2024-11-09 06:42:15,919 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=489, Invalid=2163, Unknown=0, NotChecked=0, Total=2652 [2024-11-09 06:42:15,920 INFO L87 Difference]: Start difference. First operand 68 states and 69 transitions. Second operand has 44 states, 44 states have (on average 2.0) internal successors, (88), 44 states have internal predecessors, (88), 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) [2024-11-09 06:42:16,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 06:42:16,731 INFO L93 Difference]: Finished difference Result 96 states and 102 transitions. [2024-11-09 06:42:16,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2024-11-09 06:42:16,733 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 2.0) internal successors, (88), 44 states have internal predecessors, (88), 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 67 [2024-11-09 06:42:16,733 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 06:42:16,734 INFO L225 Difference]: With dead ends: 96 [2024-11-09 06:42:16,734 INFO L226 Difference]: Without dead ends: 79 [2024-11-09 06:42:16,735 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 234 GetRequests, 176 SyntacticMatches, 1 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 811 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=568, Invalid=2854, Unknown=0, NotChecked=0, Total=3422 [2024-11-09 06:42:16,740 INFO L432 NwaCegarLoop]: 5 mSDtfsCounter, 9 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 281 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 67 SdHoareTripleChecker+Invalid, 282 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 281 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-09 06:42:16,740 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 67 Invalid, 282 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 281 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-09 06:42:16,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2024-11-09 06:42:16,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 78. [2024-11-09 06:42:16,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 77 states have (on average 1.025974025974026) internal successors, (79), 77 states have internal predecessors, (79), 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) [2024-11-09 06:42:16,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 79 transitions. [2024-11-09 06:42:16,764 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 79 transitions. Word has length 67 [2024-11-09 06:42:16,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 06:42:16,765 INFO L471 AbstractCegarLoop]: Abstraction has 78 states and 79 transitions. [2024-11-09 06:42:16,765 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 2.0) internal successors, (88), 44 states have internal predecessors, (88), 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) [2024-11-09 06:42:16,765 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 79 transitions. [2024-11-09 06:42:16,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2024-11-09 06:42:16,769 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 06:42:16,769 INFO L215 NwaCegarLoop]: trace histogram [27, 27, 8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 06:42:16,783 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ca3b742-2d83-4782-bc4b-d038ce19c677/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2024-11-09 06:42:16,970 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ca3b742-2d83-4782-bc4b-d038ce19c677/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 06:42:16,970 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 06:42:16,971 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 06:42:16,971 INFO L85 PathProgramCache]: Analyzing trace with hash -439407453, now seen corresponding path program 6 times [2024-11-09 06:42:16,971 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 06:42:16,971 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [892756696] [2024-11-09 06:42:16,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:42:16,971 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 06:42:17,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:42:18,071 INFO L134 CoverageAnalysis]: Checked inductivity of 785 backedges. 0 proven. 729 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2024-11-09 06:42:18,071 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 06:42:18,071 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [892756696] [2024-11-09 06:42:18,071 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [892756696] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 06:42:18,071 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [983088702] [2024-11-09 06:42:18,072 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-09 06:42:18,072 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 06:42:18,072 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ca3b742-2d83-4782-bc4b-d038ce19c677/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 06:42:18,074 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ca3b742-2d83-4782-bc4b-d038ce19c677/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 06:42:18,075 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ca3b742-2d83-4782-bc4b-d038ce19c677/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-09 06:42:18,214 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-09 06:42:18,214 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 06:42:18,221 INFO L255 TraceCheckSpWp]: Trace formula consists of 361 conjuncts, 29 conjuncts are in the unsatisfiable core [2024-11-09 06:42:18,224 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 06:42:18,328 INFO L134 CoverageAnalysis]: Checked inductivity of 785 backedges. 0 proven. 729 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2024-11-09 06:42:18,329 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 06:42:19,622 INFO L134 CoverageAnalysis]: Checked inductivity of 785 backedges. 0 proven. 729 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2024-11-09 06:42:19,622 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [983088702] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 06:42:19,622 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [359111942] [2024-11-09 06:42:19,624 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2024-11-09 06:42:19,624 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 06:42:19,624 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 06:42:19,625 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 06:42:19,625 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 06:42:19,892 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 06:42:20,258 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2569#(and (<= 1 |#StackHeapBarrier|) (exists ((|v_ULTIMATE.start_main_~i~1#1_70| Int)) (and (<= (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) (* |v_ULTIMATE.start_main_~i~1#1_70| 4)) 2147483647) (<= 1 |v_ULTIMATE.start_main_~i~1#1_70|) (<= 0 (+ (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) (* |v_ULTIMATE.start_main_~i~1#1_70| 4)) 2147483648)))) (<= 2 |ULTIMATE.start_main_~#a~0#1.base|) (= |ULTIMATE.start_main_~#a~0#1.offset| 0))' at error location [2024-11-09 06:42:20,258 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 06:42:20,258 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 06:42:20,258 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29, 29] total 58 [2024-11-09 06:42:20,258 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1672762064] [2024-11-09 06:42:20,258 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 06:42:20,259 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 59 states [2024-11-09 06:42:20,259 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 06:42:20,260 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2024-11-09 06:42:20,262 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1733, Invalid=2689, Unknown=0, NotChecked=0, Total=4422 [2024-11-09 06:42:20,263 INFO L87 Difference]: Start difference. First operand 78 states and 79 transitions. Second operand has 59 states, 59 states have (on average 2.0847457627118646) internal successors, (123), 58 states have internal predecessors, (123), 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) [2024-11-09 06:42:20,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 06:42:20,524 INFO L93 Difference]: Finished difference Result 158 states and 188 transitions. [2024-11-09 06:42:20,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2024-11-09 06:42:20,524 INFO L78 Accepts]: Start accepts. Automaton has has 59 states, 59 states have (on average 2.0847457627118646) internal successors, (123), 58 states have internal predecessors, (123), 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 77 [2024-11-09 06:42:20,525 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 06:42:20,526 INFO L225 Difference]: With dead ends: 158 [2024-11-09 06:42:20,526 INFO L226 Difference]: Without dead ends: 136 [2024-11-09 06:42:20,527 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 258 GetRequests, 193 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 792 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=1733, Invalid=2689, Unknown=0, NotChecked=0, Total=4422 [2024-11-09 06:42:20,528 INFO L432 NwaCegarLoop]: 9 mSDtfsCounter, 2 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 122 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 124 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 122 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-09 06:42:20,528 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 37 Invalid, 124 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 122 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-09 06:42:20,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2024-11-09 06:42:20,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 136. [2024-11-09 06:42:20,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136 states, 135 states have (on average 1.0148148148148148) internal successors, (137), 135 states have internal predecessors, (137), 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) [2024-11-09 06:42:20,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 137 transitions. [2024-11-09 06:42:20,550 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 137 transitions. Word has length 77 [2024-11-09 06:42:20,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 06:42:20,550 INFO L471 AbstractCegarLoop]: Abstraction has 136 states and 137 transitions. [2024-11-09 06:42:20,551 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 59 states, 59 states have (on average 2.0847457627118646) internal successors, (123), 58 states have internal predecessors, (123), 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) [2024-11-09 06:42:20,551 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 137 transitions. [2024-11-09 06:42:20,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2024-11-09 06:42:20,553 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 06:42:20,553 INFO L215 NwaCegarLoop]: trace histogram [56, 56, 8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 06:42:20,574 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ca3b742-2d83-4782-bc4b-d038ce19c677/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-11-09 06:42:20,757 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ca3b742-2d83-4782-bc4b-d038ce19c677/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 06:42:20,757 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 06:42:20,757 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 06:42:20,758 INFO L85 PathProgramCache]: Analyzing trace with hash 1340845748, now seen corresponding path program 7 times [2024-11-09 06:42:20,758 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 06:42:20,758 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [516291357] [2024-11-09 06:42:20,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:42:20,758 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 06:42:20,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:42:24,012 INFO L134 CoverageAnalysis]: Checked inductivity of 3192 backedges. 0 proven. 3136 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2024-11-09 06:42:24,012 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 06:42:24,012 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [516291357] [2024-11-09 06:42:24,012 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [516291357] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 06:42:24,013 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1055112487] [2024-11-09 06:42:24,013 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-09 06:42:24,013 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 06:42:24,013 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ca3b742-2d83-4782-bc4b-d038ce19c677/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 06:42:24,015 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ca3b742-2d83-4782-bc4b-d038ce19c677/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 06:42:24,017 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ca3b742-2d83-4782-bc4b-d038ce19c677/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-09 06:42:24,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:42:24,222 INFO L255 TraceCheckSpWp]: Trace formula consists of 651 conjuncts, 58 conjuncts are in the unsatisfiable core [2024-11-09 06:42:24,226 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 06:42:24,407 INFO L134 CoverageAnalysis]: Checked inductivity of 3192 backedges. 0 proven. 3136 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2024-11-09 06:42:24,407 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 06:42:28,820 INFO L134 CoverageAnalysis]: Checked inductivity of 3192 backedges. 0 proven. 3136 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2024-11-09 06:42:28,821 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1055112487] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 06:42:28,821 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1135267410] [2024-11-09 06:42:28,822 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2024-11-09 06:42:28,822 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 06:42:28,823 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 06:42:28,823 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 06:42:28,823 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 06:42:29,032 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 06:42:29,561 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3930#(and (<= 1 |#StackHeapBarrier|) (<= 2 |ULTIMATE.start_main_~#a~0#1.base|) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (exists ((|v_ULTIMATE.start_main_~i~1#1_82| Int)) (and (<= (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) (* |v_ULTIMATE.start_main_~i~1#1_82| 4)) 2147483647) (<= 0 (+ (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) (* |v_ULTIMATE.start_main_~i~1#1_82| 4)) 2147483648)) (<= 1 |v_ULTIMATE.start_main_~i~1#1_82|))))' at error location [2024-11-09 06:42:29,562 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 06:42:29,562 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 06:42:29,562 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [58, 58, 58] total 116 [2024-11-09 06:42:29,562 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [540723180] [2024-11-09 06:42:29,562 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 06:42:29,563 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 117 states [2024-11-09 06:42:29,563 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 06:42:29,566 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 117 interpolants. [2024-11-09 06:42:29,569 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6808, Invalid=8692, Unknown=0, NotChecked=0, Total=15500 [2024-11-09 06:42:29,570 INFO L87 Difference]: Start difference. First operand 136 states and 137 transitions. Second operand has 117 states, 117 states have (on average 2.0427350427350426) internal successors, (239), 116 states have internal predecessors, (239), 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) [2024-11-09 06:42:30,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 06:42:30,097 INFO L93 Difference]: Finished difference Result 274 states and 333 transitions. [2024-11-09 06:42:30,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 116 states. [2024-11-09 06:42:30,098 INFO L78 Accepts]: Start accepts. Automaton has has 117 states, 117 states have (on average 2.0427350427350426) internal successors, (239), 116 states have internal predecessors, (239), 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 135 [2024-11-09 06:42:30,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 06:42:30,100 INFO L225 Difference]: With dead ends: 274 [2024-11-09 06:42:30,100 INFO L226 Difference]: Without dead ends: 252 [2024-11-09 06:42:30,104 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 461 GetRequests, 338 SyntacticMatches, 0 SemanticMatches, 123 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1604 ImplicationChecksByTransitivity, 6.3s TimeCoverageRelationStatistics Valid=6808, Invalid=8692, Unknown=0, NotChecked=0, Total=15500 [2024-11-09 06:42:30,104 INFO L432 NwaCegarLoop]: 9 mSDtfsCounter, 2 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 240 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 242 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 240 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-09 06:42:30,104 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 37 Invalid, 242 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 240 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-09 06:42:30,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 252 states. [2024-11-09 06:42:30,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 252 to 252. [2024-11-09 06:42:30,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 252 states, 251 states have (on average 1.0079681274900398) internal successors, (253), 251 states have internal predecessors, (253), 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) [2024-11-09 06:42:30,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 252 states to 252 states and 253 transitions. [2024-11-09 06:42:30,155 INFO L78 Accepts]: Start accepts. Automaton has 252 states and 253 transitions. Word has length 135 [2024-11-09 06:42:30,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 06:42:30,156 INFO L471 AbstractCegarLoop]: Abstraction has 252 states and 253 transitions. [2024-11-09 06:42:30,156 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 117 states, 117 states have (on average 2.0427350427350426) internal successors, (239), 116 states have internal predecessors, (239), 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) [2024-11-09 06:42:30,156 INFO L276 IsEmpty]: Start isEmpty. Operand 252 states and 253 transitions. [2024-11-09 06:42:30,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 252 [2024-11-09 06:42:30,161 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 06:42:30,161 INFO L215 NwaCegarLoop]: trace histogram [114, 114, 8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 06:42:30,177 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ca3b742-2d83-4782-bc4b-d038ce19c677/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-11-09 06:42:30,361 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ca3b742-2d83-4782-bc4b-d038ce19c677/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 06:42:30,362 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 06:42:30,362 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 06:42:30,362 INFO L85 PathProgramCache]: Analyzing trace with hash -1982558954, now seen corresponding path program 8 times [2024-11-09 06:42:30,362 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 06:42:30,362 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1884506472] [2024-11-09 06:42:30,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:42:30,362 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 06:42:30,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:42:40,911 INFO L134 CoverageAnalysis]: Checked inductivity of 13052 backedges. 0 proven. 12996 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2024-11-09 06:42:40,911 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 06:42:40,911 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1884506472] [2024-11-09 06:42:40,911 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1884506472] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 06:42:40,912 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1695994192] [2024-11-09 06:42:40,912 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-09 06:42:40,912 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 06:42:40,912 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ca3b742-2d83-4782-bc4b-d038ce19c677/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 06:42:40,915 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ca3b742-2d83-4782-bc4b-d038ce19c677/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 06:42:40,917 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ca3b742-2d83-4782-bc4b-d038ce19c677/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-11-09 06:42:41,222 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2024-11-09 06:42:41,222 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 06:42:41,224 INFO L255 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 43 conjuncts are in the unsatisfiable core [2024-11-09 06:42:41,229 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 06:42:41,245 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 11 [2024-11-09 06:42:43,544 INFO L349 Elim1Store]: treesize reduction 24, result has 87.0 percent of original size [2024-11-09 06:42:43,545 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 89 treesize of output 191 [2024-11-09 06:42:44,346 INFO L134 CoverageAnalysis]: Checked inductivity of 13052 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 12996 trivial. 0 not checked. [2024-11-09 06:42:44,347 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 06:42:49,773 INFO L134 CoverageAnalysis]: Checked inductivity of 13052 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 12996 trivial. 0 not checked. [2024-11-09 06:42:49,774 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1695994192] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 06:42:49,774 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1312304315] [2024-11-09 06:42:49,776 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2024-11-09 06:42:49,776 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 06:42:49,776 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 06:42:49,776 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 06:42:49,776 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 06:42:49,951 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 06:42:51,261 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '6366#(and (<= 1 |#StackHeapBarrier|) (exists ((|v_ULTIMATE.start_main_~i~1#1_102| Int)) (and (<= 1 |v_ULTIMATE.start_main_~i~1#1_102|) (<= 0 (+ (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) (* 4 |v_ULTIMATE.start_main_~i~1#1_102|)) 2147483648)) (<= (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) (* 4 |v_ULTIMATE.start_main_~i~1#1_102|)) 2147483647))) (<= 2 |ULTIMATE.start_main_~#a~0#1.base|) (= |ULTIMATE.start_main_~#a~0#1.offset| 0))' at error location [2024-11-09 06:42:51,262 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 06:42:51,262 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 06:42:51,262 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [116, 18, 18] total 148 [2024-11-09 06:42:51,263 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1080325887] [2024-11-09 06:42:51,263 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 06:42:51,265 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 148 states [2024-11-09 06:42:51,265 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 06:42:51,268 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 148 interpolants. [2024-11-09 06:42:51,275 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7045, Invalid=17134, Unknown=1, NotChecked=0, Total=24180 [2024-11-09 06:42:51,277 INFO L87 Difference]: Start difference. First operand 252 states and 253 transitions. Second operand has 148 states, 148 states have (on average 1.8918918918918919) internal successors, (280), 148 states have internal predecessors, (280), 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) [2024-11-09 06:42:58,979 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 06:42:58,979 INFO L93 Difference]: Finished difference Result 296 states and 306 transitions. [2024-11-09 06:42:58,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 148 states. [2024-11-09 06:42:58,979 INFO L78 Accepts]: Start accepts. Automaton has has 148 states, 148 states have (on average 1.8918918918918919) internal successors, (280), 148 states have internal predecessors, (280), 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 251 [2024-11-09 06:42:58,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 06:42:58,981 INFO L225 Difference]: With dead ends: 296 [2024-11-09 06:42:58,981 INFO L226 Difference]: Without dead ends: 271 [2024-11-09 06:42:58,985 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 888 GetRequests, 712 SyntacticMatches, 1 SemanticMatches, 175 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5632 ImplicationChecksByTransitivity, 20.8s TimeCoverageRelationStatistics Valid=7593, Invalid=23558, Unknown=1, NotChecked=0, Total=31152 [2024-11-09 06:42:58,986 INFO L432 NwaCegarLoop]: 5 mSDtfsCounter, 30 mSDsluCounter, 81 mSDsCounter, 0 mSdLazyCounter, 538 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 86 SdHoareTripleChecker+Invalid, 541 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 538 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2024-11-09 06:42:58,986 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [30 Valid, 86 Invalid, 541 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 538 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2024-11-09 06:42:58,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 271 states. [2024-11-09 06:42:59,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 271 to 270. [2024-11-09 06:42:59,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 270 states, 269 states have (on average 1.0074349442379182) internal successors, (271), 269 states have internal predecessors, (271), 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) [2024-11-09 06:42:59,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 270 states to 270 states and 271 transitions. [2024-11-09 06:42:59,028 INFO L78 Accepts]: Start accepts. Automaton has 270 states and 271 transitions. Word has length 251 [2024-11-09 06:42:59,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 06:42:59,029 INFO L471 AbstractCegarLoop]: Abstraction has 270 states and 271 transitions. [2024-11-09 06:42:59,029 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 148 states, 148 states have (on average 1.8918918918918919) internal successors, (280), 148 states have internal predecessors, (280), 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) [2024-11-09 06:42:59,030 INFO L276 IsEmpty]: Start isEmpty. Operand 270 states and 271 transitions. [2024-11-09 06:42:59,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 270 [2024-11-09 06:42:59,034 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 06:42:59,036 INFO L215 NwaCegarLoop]: trace histogram [115, 115, 16, 15, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 06:42:59,058 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ca3b742-2d83-4782-bc4b-d038ce19c677/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2024-11-09 06:42:59,236 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ca3b742-2d83-4782-bc4b-d038ce19c677/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2024-11-09 06:42:59,236 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 06:42:59,237 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 06:42:59,237 INFO L85 PathProgramCache]: Analyzing trace with hash 129769779, now seen corresponding path program 9 times [2024-11-09 06:42:59,237 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 06:42:59,237 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [640355629] [2024-11-09 06:42:59,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:42:59,237 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 06:42:59,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:43:09,463 INFO L134 CoverageAnalysis]: Checked inductivity of 13465 backedges. 0 proven. 13225 refuted. 0 times theorem prover too weak. 240 trivial. 0 not checked. [2024-11-09 06:43:09,464 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 06:43:09,464 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [640355629] [2024-11-09 06:43:09,464 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [640355629] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 06:43:09,464 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [266885532] [2024-11-09 06:43:09,464 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-09 06:43:09,465 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 06:43:09,465 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ca3b742-2d83-4782-bc4b-d038ce19c677/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 06:43:09,466 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ca3b742-2d83-4782-bc4b-d038ce19c677/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 06:43:09,467 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ca3b742-2d83-4782-bc4b-d038ce19c677/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-11-09 06:43:09,849 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-09 06:43:09,849 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 06:43:09,855 INFO L255 TraceCheckSpWp]: Trace formula consists of 1281 conjuncts, 117 conjuncts are in the unsatisfiable core [2024-11-09 06:43:09,859 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 06:43:10,227 INFO L134 CoverageAnalysis]: Checked inductivity of 13465 backedges. 0 proven. 13225 refuted. 0 times theorem prover too weak. 240 trivial. 0 not checked. [2024-11-09 06:43:10,228 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 06:43:28,438 INFO L134 CoverageAnalysis]: Checked inductivity of 13465 backedges. 0 proven. 13225 refuted. 0 times theorem prover too weak. 240 trivial. 0 not checked. [2024-11-09 06:43:28,438 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [266885532] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 06:43:28,439 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [715994713] [2024-11-09 06:43:28,440 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2024-11-09 06:43:28,440 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 06:43:28,441 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 06:43:28,441 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 06:43:28,441 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 06:43:28,630 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 06:43:29,526 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '9097#(and (<= 1 |#StackHeapBarrier|) (exists ((|v_ULTIMATE.start_main_~i~1#1_122| Int)) (and (<= 0 (+ (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) (* 4 |v_ULTIMATE.start_main_~i~1#1_122|)) 2147483648)) (<= (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) (* 4 |v_ULTIMATE.start_main_~i~1#1_122|)) 2147483647) (<= 1 |v_ULTIMATE.start_main_~i~1#1_122|))) (<= 2 |ULTIMATE.start_main_~#a~0#1.base|) (= |ULTIMATE.start_main_~#a~0#1.offset| 0))' at error location [2024-11-09 06:43:29,526 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 06:43:29,526 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 06:43:29,527 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [117, 117, 117] total 234 [2024-11-09 06:43:29,527 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [697527366] [2024-11-09 06:43:29,527 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 06:43:29,528 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 235 states [2024-11-09 06:43:29,528 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 06:43:29,536 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 235 interpolants. [2024-11-09 06:43:29,542 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27517, Invalid=31289, Unknown=0, NotChecked=0, Total=58806 [2024-11-09 06:43:29,543 INFO L87 Difference]: Start difference. First operand 270 states and 271 transitions. Second operand has 235 states, 235 states have (on average 2.021276595744681) internal successors, (475), 234 states have internal predecessors, (475), 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) [2024-11-09 06:43:31,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 06:43:31,622 INFO L93 Difference]: Finished difference Result 542 states and 660 transitions. [2024-11-09 06:43:31,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 234 states. [2024-11-09 06:43:31,623 INFO L78 Accepts]: Start accepts. Automaton has has 235 states, 235 states have (on average 2.021276595744681) internal successors, (475), 234 states have internal predecessors, (475), 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 269 [2024-11-09 06:43:31,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 06:43:31,625 INFO L225 Difference]: With dead ends: 542 [2024-11-09 06:43:31,625 INFO L226 Difference]: Without dead ends: 504 [2024-11-09 06:43:31,629 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 922 GetRequests, 681 SyntacticMatches, 0 SemanticMatches, 241 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3256 ImplicationChecksByTransitivity, 24.6s TimeCoverageRelationStatistics Valid=27517, Invalid=31289, Unknown=0, NotChecked=0, Total=58806 [2024-11-09 06:43:31,630 INFO L432 NwaCegarLoop]: 9 mSDtfsCounter, 2 mSDsluCounter, 49 mSDsCounter, 0 mSdLazyCounter, 480 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 482 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 480 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2024-11-09 06:43:31,630 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 58 Invalid, 482 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 480 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2024-11-09 06:43:31,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 504 states. [2024-11-09 06:43:31,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 504 to 504. [2024-11-09 06:43:31,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 504 states, 503 states have (on average 1.0039761431411531) internal successors, (505), 503 states have internal predecessors, (505), 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) [2024-11-09 06:43:31,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 504 states to 504 states and 505 transitions. [2024-11-09 06:43:31,692 INFO L78 Accepts]: Start accepts. Automaton has 504 states and 505 transitions. Word has length 269 [2024-11-09 06:43:31,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 06:43:31,692 INFO L471 AbstractCegarLoop]: Abstraction has 504 states and 505 transitions. [2024-11-09 06:43:31,693 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 235 states, 235 states have (on average 2.021276595744681) internal successors, (475), 234 states have internal predecessors, (475), 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) [2024-11-09 06:43:31,693 INFO L276 IsEmpty]: Start isEmpty. Operand 504 states and 505 transitions. [2024-11-09 06:43:31,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 504 [2024-11-09 06:43:31,705 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 06:43:31,705 INFO L215 NwaCegarLoop]: trace histogram [232, 232, 16, 15, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 06:43:31,728 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ca3b742-2d83-4782-bc4b-d038ce19c677/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2024-11-09 06:43:31,905 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ca3b742-2d83-4782-bc4b-d038ce19c677/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2024-11-09 06:43:31,906 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 06:43:31,906 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 06:43:31,906 INFO L85 PathProgramCache]: Analyzing trace with hash -684888580, now seen corresponding path program 10 times [2024-11-09 06:43:31,906 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 06:43:31,906 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [700038965] [2024-11-09 06:43:31,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:43:31,907 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 06:43:32,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:44:12,439 INFO L134 CoverageAnalysis]: Checked inductivity of 54064 backedges. 0 proven. 53824 refuted. 0 times theorem prover too weak. 240 trivial. 0 not checked. [2024-11-09 06:44:12,439 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 06:44:12,439 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [700038965] [2024-11-09 06:44:12,439 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [700038965] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 06:44:12,440 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1014341636] [2024-11-09 06:44:12,440 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-09 06:44:12,440 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 06:44:12,440 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ca3b742-2d83-4782-bc4b-d038ce19c677/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 06:44:12,442 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ca3b742-2d83-4782-bc4b-d038ce19c677/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 06:44:12,443 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ca3b742-2d83-4782-bc4b-d038ce19c677/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-11-09 06:44:13,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:44:13,184 INFO L255 TraceCheckSpWp]: Trace formula consists of 2451 conjuncts, 234 conjuncts are in the unsatisfiable core [2024-11-09 06:44:13,191 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 06:44:13,906 INFO L134 CoverageAnalysis]: Checked inductivity of 54064 backedges. 0 proven. 53824 refuted. 0 times theorem prover too weak. 240 trivial. 0 not checked. [2024-11-09 06:44:13,906 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 06:45:29,554 INFO L134 CoverageAnalysis]: Checked inductivity of 54064 backedges. 0 proven. 53824 refuted. 0 times theorem prover too weak. 240 trivial. 0 not checked. [2024-11-09 06:45:29,555 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1014341636] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 06:45:29,555 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [368604110] [2024-11-09 06:45:29,557 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2024-11-09 06:45:29,557 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 06:45:29,557 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 06:45:29,557 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 06:45:29,557 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 06:45:29,802 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 06:45:31,390 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '14146#(and (<= 1 |#StackHeapBarrier|) (exists ((|v_ULTIMATE.start_main_~i~1#1_142| Int)) (and (<= (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) (* 4 |v_ULTIMATE.start_main_~i~1#1_142|)) 2147483647) (<= 1 |v_ULTIMATE.start_main_~i~1#1_142|) (<= 0 (+ (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) (* 4 |v_ULTIMATE.start_main_~i~1#1_142|)) 2147483648)))) (<= 2 |ULTIMATE.start_main_~#a~0#1.base|) (= |ULTIMATE.start_main_~#a~0#1.offset| 0))' at error location [2024-11-09 06:45:31,390 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 06:45:31,390 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 06:45:31,391 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [234, 234, 234] total 468 [2024-11-09 06:45:31,391 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [440051595] [2024-11-09 06:45:31,391 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 06:45:31,392 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 469 states [2024-11-09 06:45:31,392 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 06:45:31,405 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 469 interpolants. [2024-11-09 06:45:31,415 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=109768, Invalid=117284, Unknown=0, NotChecked=0, Total=227052 [2024-11-09 06:45:31,417 INFO L87 Difference]: Start difference. First operand 504 states and 505 transitions. Second operand has 469 states, 469 states have (on average 2.0106609808102345) internal successors, (943), 468 states have internal predecessors, (943), 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) [2024-11-09 06:45:39,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 06:45:39,773 INFO L93 Difference]: Finished difference Result 1010 states and 1245 transitions. [2024-11-09 06:45:39,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 468 states. [2024-11-09 06:45:39,774 INFO L78 Accepts]: Start accepts. Automaton has has 469 states, 469 states have (on average 2.0106609808102345) internal successors, (943), 468 states have internal predecessors, (943), 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 503 [2024-11-09 06:45:39,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 06:45:39,778 INFO L225 Difference]: With dead ends: 1010 [2024-11-09 06:45:39,778 INFO L226 Difference]: Without dead ends: 972 [2024-11-09 06:45:39,791 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 1741 GetRequests, 1266 SyntacticMatches, 0 SemanticMatches, 475 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6532 ImplicationChecksByTransitivity, 100.7s TimeCoverageRelationStatistics Valid=109768, Invalid=117284, Unknown=0, NotChecked=0, Total=227052 [2024-11-09 06:45:39,791 INFO L432 NwaCegarLoop]: 9 mSDtfsCounter, 2 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 942 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 944 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 942 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2024-11-09 06:45:39,792 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 37 Invalid, 944 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 942 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2024-11-09 06:45:39,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 972 states. [2024-11-09 06:45:39,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 972 to 972. [2024-11-09 06:45:39,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 972 states, 971 states have (on average 1.0020597322348095) internal successors, (973), 971 states have internal predecessors, (973), 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) [2024-11-09 06:45:39,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 972 states to 972 states and 973 transitions. [2024-11-09 06:45:39,866 INFO L78 Accepts]: Start accepts. Automaton has 972 states and 973 transitions. Word has length 503 [2024-11-09 06:45:39,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 06:45:39,867 INFO L471 AbstractCegarLoop]: Abstraction has 972 states and 973 transitions. [2024-11-09 06:45:39,868 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 469 states, 469 states have (on average 2.0106609808102345) internal successors, (943), 468 states have internal predecessors, (943), 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) [2024-11-09 06:45:39,868 INFO L276 IsEmpty]: Start isEmpty. Operand 972 states and 973 transitions. [2024-11-09 06:45:39,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 972 [2024-11-09 06:45:39,878 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 06:45:39,878 INFO L215 NwaCegarLoop]: trace histogram [466, 466, 16, 15, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 06:45:39,896 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ca3b742-2d83-4782-bc4b-d038ce19c677/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2024-11-09 06:45:40,079 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ca3b742-2d83-4782-bc4b-d038ce19c677/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2024-11-09 06:45:40,079 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 06:45:40,079 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 06:45:40,080 INFO L85 PathProgramCache]: Analyzing trace with hash -293999154, now seen corresponding path program 11 times [2024-11-09 06:45:40,080 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 06:45:40,080 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [800284094] [2024-11-09 06:45:40,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:45:40,080 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 06:45:41,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:48:48,221 INFO L134 CoverageAnalysis]: Checked inductivity of 217396 backedges. 0 proven. 217156 refuted. 0 times theorem prover too weak. 240 trivial. 0 not checked. [2024-11-09 06:48:48,221 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 06:48:48,221 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [800284094] [2024-11-09 06:48:48,221 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [800284094] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 06:48:48,221 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1127034087] [2024-11-09 06:48:48,222 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-09 06:48:48,222 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 06:48:48,222 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ca3b742-2d83-4782-bc4b-d038ce19c677/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 06:48:48,223 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ca3b742-2d83-4782-bc4b-d038ce19c677/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 06:48:48,224 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ca3b742-2d83-4782-bc4b-d038ce19c677/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-11-09 06:48:49,954 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2024-11-09 06:48:49,954 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 06:48:49,959 INFO L255 TraceCheckSpWp]: Trace formula consists of 281 conjuncts, 81 conjuncts are in the unsatisfiable core [2024-11-09 06:48:49,975 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 06:48:50,002 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 11 [2024-11-09 06:49:14,074 INFO L349 Elim1Store]: treesize reduction 56, result has 87.1 percent of original size [2024-11-09 06:49:14,075 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 16 select indices, 16 select index equivalence classes, 0 disjoint index pairs (out of 120 index pairs), introduced 16 new quantified variables, introduced 120 case distinctions, treesize of input 165 treesize of output 439 [2024-11-09 06:49:18,400 WARN L672 sPolynomialRelations]: Constructing 2048(two to the power of 11 dual juncts. [2024-11-09 06:49:19,588 INFO L134 CoverageAnalysis]: Checked inductivity of 217396 backedges. 0 proven. 240 refuted. 0 times theorem prover too weak. 217156 trivial. 0 not checked. [2024-11-09 06:49:19,588 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 06:50:29,870 INFO L134 CoverageAnalysis]: Checked inductivity of 217396 backedges. 0 proven. 223 refuted. 17 times theorem prover too weak. 217156 trivial. 0 not checked. [2024-11-09 06:50:29,870 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1127034087] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 06:50:29,870 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1174117448] [2024-11-09 06:50:29,872 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2024-11-09 06:50:29,873 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 06:50:29,873 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 06:50:29,873 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 06:50:29,873 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 06:50:30,063 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 06:50:34,206 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '23470#(and (<= 1 |#StackHeapBarrier|) (exists ((|v_ULTIMATE.start_main_~i~1#1_178| Int)) (and (<= (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) (* 4 |v_ULTIMATE.start_main_~i~1#1_178|)) 2147483647) (<= 1 |v_ULTIMATE.start_main_~i~1#1_178|) (<= 0 (+ 2147483648 (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) (* 4 |v_ULTIMATE.start_main_~i~1#1_178|)))))) (<= 2 |ULTIMATE.start_main_~#a~0#1.base|) (= |ULTIMATE.start_main_~#a~0#1.offset| 0))' at error location [2024-11-09 06:50:34,206 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 06:50:34,206 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 06:50:34,207 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [468, 34, 34] total 532 [2024-11-09 06:50:34,208 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [733391941] [2024-11-09 06:50:34,208 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 06:50:34,210 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 532 states [2024-11-09 06:50:34,210 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 06:50:34,233 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 532 interpolants. [2024-11-09 06:50:34,248 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110609, Invalid=180433, Unknown=18, NotChecked=0, Total=291060 [2024-11-09 06:50:34,250 INFO L87 Difference]: Start difference. First operand 972 states and 973 transitions. Second operand has 532 states, 532 states have (on average 1.9097744360902256) internal successors, (1016), 532 states have internal predecessors, (1016), 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) [2024-11-09 06:51:05,286 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-09 06:51:47,030 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-09 06:52:33,986 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-09 06:53:31,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 06:53:31,613 INFO L93 Difference]: Finished difference Result 1048 states and 1066 transitions. [2024-11-09 06:53:31,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 532 states. [2024-11-09 06:53:31,615 INFO L78 Accepts]: Start accepts. Automaton has has 532 states, 532 states have (on average 1.9097744360902256) internal successors, (1016), 532 states have internal predecessors, (1016), 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 971 [2024-11-09 06:53:31,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 06:53:31,620 INFO L225 Difference]: With dead ends: 1048 [2024-11-09 06:53:31,621 INFO L226 Difference]: Without dead ends: 1007 [2024-11-09 06:53:31,641 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 3410 GetRequests, 2840 SyntacticMatches, 1 SemanticMatches, 569 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36571 ImplicationChecksByTransitivity, 356.7s TimeCoverageRelationStatistics Valid=112068, Invalid=213346, Unknown=56, NotChecked=0, Total=325470 [2024-11-09 06:53:31,642 INFO L432 NwaCegarLoop]: 5 mSDtfsCounter, 90 mSDsluCounter, 138 mSDsCounter, 0 mSdLazyCounter, 2035 mSolverCounterSat, 1 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 143 SdHoareTripleChecker+Invalid, 2039 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 2035 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.9s IncrementalHoareTripleChecker+Time [2024-11-09 06:53:31,642 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [90 Valid, 143 Invalid, 2039 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 2035 Invalid, 3 Unknown, 0 Unchecked, 9.9s Time] [2024-11-09 06:53:31,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1007 states. [2024-11-09 06:53:31,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1007 to 1006. [2024-11-09 06:53:31,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1006 states, 1005 states have (on average 1.0019900497512437) internal successors, (1007), 1005 states have internal predecessors, (1007), 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) [2024-11-09 06:53:31,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1006 states to 1006 states and 1007 transitions. [2024-11-09 06:53:31,751 INFO L78 Accepts]: Start accepts. Automaton has 1006 states and 1007 transitions. Word has length 971 [2024-11-09 06:53:31,753 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 06:53:31,753 INFO L471 AbstractCegarLoop]: Abstraction has 1006 states and 1007 transitions. [2024-11-09 06:53:31,754 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 532 states, 532 states have (on average 1.9097744360902256) internal successors, (1016), 532 states have internal predecessors, (1016), 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) [2024-11-09 06:53:31,754 INFO L276 IsEmpty]: Start isEmpty. Operand 1006 states and 1007 transitions. [2024-11-09 06:53:31,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1006 [2024-11-09 06:53:31,764 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 06:53:31,765 INFO L215 NwaCegarLoop]: trace histogram [467, 467, 32, 31, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 06:53:31,790 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ca3b742-2d83-4782-bc4b-d038ce19c677/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2024-11-09 06:53:31,965 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7ca3b742-2d83-4782-bc4b-d038ce19c677/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2024-11-09 06:53:31,966 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 06:53:31,966 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 06:53:31,966 INFO L85 PathProgramCache]: Analyzing trace with hash -93811773, now seen corresponding path program 12 times [2024-11-09 06:53:31,966 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 06:53:31,967 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1715747999] [2024-11-09 06:53:31,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:53:31,967 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 06:53:33,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat