./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-examples/sorting_bubblesort_2_ground.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version a0165632 Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d62882a-abfe-4836-ac0c-7372735f477e/bin/utaipan-verify-YMUCfTKeje/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d62882a-abfe-4836-ac0c-7372735f477e/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_3d62882a-abfe-4836-ac0c-7372735f477e/bin/utaipan-verify-YMUCfTKeje/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d62882a-abfe-4836-ac0c-7372735f477e/bin/utaipan-verify-YMUCfTKeje/config/TaipanReach.xml -i ../../sv-benchmarks/c/array-examples/sorting_bubblesort_2_ground.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d62882a-abfe-4836-ac0c-7372735f477e/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_3d62882a-abfe-4836-ac0c-7372735f477e/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 2e8196ca3e7f8da6be63ed057317b8a370ba560e11740ea9a51451f140c434c1 --- Real Ultimate output --- This is Ultimate 0.2.5-dev-a016563 [2024-11-09 06:35:01,695 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-09 06:35:01,803 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d62882a-abfe-4836-ac0c-7372735f477e/bin/utaipan-verify-YMUCfTKeje/config/svcomp-Reach-32bit-Taipan_Default.epf [2024-11-09 06:35:01,810 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-09 06:35:01,814 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-09 06:35:01,870 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-09 06:35:01,870 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-09 06:35:01,871 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-09 06:35:01,872 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-09 06:35:01,872 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-09 06:35:01,873 INFO L153 SettingsManager]: * User list type=DISABLED [2024-11-09 06:35:01,874 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2024-11-09 06:35:01,874 INFO L153 SettingsManager]: * Explicit value domain=true [2024-11-09 06:35:01,875 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2024-11-09 06:35:01,875 INFO L153 SettingsManager]: * Octagon Domain=false [2024-11-09 06:35:01,876 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2024-11-09 06:35:01,877 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2024-11-09 06:35:01,877 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2024-11-09 06:35:01,878 INFO L153 SettingsManager]: * Interval Domain=false [2024-11-09 06:35:01,878 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2024-11-09 06:35:01,879 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2024-11-09 06:35:01,880 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2024-11-09 06:35:01,880 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-09 06:35:01,904 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-09 06:35:01,906 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-09 06:35:01,909 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-09 06:35:01,910 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-09 06:35:01,910 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-09 06:35:01,910 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-09 06:35:01,911 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-09 06:35:01,911 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-09 06:35:01,911 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-09 06:35:01,912 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-09 06:35:01,912 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-09 06:35:01,912 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-09 06:35:01,913 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-09 06:35:01,913 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-09 06:35:01,913 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-09 06:35:01,914 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2024-11-09 06:35:01,914 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-09 06:35:01,914 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-09 06:35:01,917 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-09 06:35:01,918 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2024-11-09 06:35:01,919 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-09 06:35:01,919 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-09 06:35:01,920 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2024-11-09 06:35:01,920 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-09 06:35:01,921 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_3d62882a-abfe-4836-ac0c-7372735f477e/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d62882a-abfe-4836-ac0c-7372735f477e/bin/utaipan-verify-YMUCfTKeje Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 2e8196ca3e7f8da6be63ed057317b8a370ba560e11740ea9a51451f140c434c1 [2024-11-09 06:35:02,319 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-09 06:35:02,361 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-09 06:35:02,364 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-09 06:35:02,367 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-09 06:35:02,368 INFO L274 PluginConnector]: CDTParser initialized [2024-11-09 06:35:02,370 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d62882a-abfe-4836-ac0c-7372735f477e/bin/utaipan-verify-YMUCfTKeje/../../sv-benchmarks/c/array-examples/sorting_bubblesort_2_ground.i Unable to find full path for "g++" [2024-11-09 06:35:05,028 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-09 06:35:05,250 INFO L384 CDTParser]: Found 1 translation units. [2024-11-09 06:35:05,251 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d62882a-abfe-4836-ac0c-7372735f477e/sv-benchmarks/c/array-examples/sorting_bubblesort_2_ground.i [2024-11-09 06:35:05,262 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d62882a-abfe-4836-ac0c-7372735f477e/bin/utaipan-verify-YMUCfTKeje/data/f37167f89/3d707878344d4ca68cb26b245e084786/FLAGd69311a6c [2024-11-09 06:35:05,283 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d62882a-abfe-4836-ac0c-7372735f477e/bin/utaipan-verify-YMUCfTKeje/data/f37167f89/3d707878344d4ca68cb26b245e084786 [2024-11-09 06:35:05,289 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-09 06:35:05,294 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-09 06:35:05,296 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-09 06:35:05,296 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-09 06:35:05,306 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-09 06:35:05,307 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.11 06:35:05" (1/1) ... [2024-11-09 06:35:05,309 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@72c88a25 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 06:35:05, skipping insertion in model container [2024-11-09 06:35:05,309 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.11 06:35:05" (1/1) ... [2024-11-09 06:35:05,337 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-09 06:35:05,585 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_3d62882a-abfe-4836-ac0c-7372735f477e/sv-benchmarks/c/array-examples/sorting_bubblesort_2_ground.i[820,833] [2024-11-09 06:35:05,615 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-09 06:35:05,628 INFO L200 MainTranslator]: Completed pre-run [2024-11-09 06:35:05,647 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_3d62882a-abfe-4836-ac0c-7372735f477e/sv-benchmarks/c/array-examples/sorting_bubblesort_2_ground.i[820,833] [2024-11-09 06:35:05,659 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-09 06:35:05,686 INFO L204 MainTranslator]: Completed translation [2024-11-09 06:35:05,686 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 06:35:05 WrapperNode [2024-11-09 06:35:05,687 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-09 06:35:05,688 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-09 06:35:05,689 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-09 06:35:05,689 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-09 06:35:05,699 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 06:35:05" (1/1) ... [2024-11-09 06:35:05,708 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 06:35:05" (1/1) ... [2024-11-09 06:35:05,732 INFO L138 Inliner]: procedures = 16, calls = 19, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 80 [2024-11-09 06:35:05,733 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-09 06:35:05,734 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-09 06:35:05,734 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-09 06:35:05,734 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-09 06:35:05,747 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 06:35:05" (1/1) ... [2024-11-09 06:35:05,748 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 06:35:05" (1/1) ... [2024-11-09 06:35:05,750 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 06:35:05" (1/1) ... [2024-11-09 06:35:05,750 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 06:35:05" (1/1) ... [2024-11-09 06:35:05,763 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 06:35:05" (1/1) ... [2024-11-09 06:35:05,777 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 06:35:05" (1/1) ... [2024-11-09 06:35:05,779 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 06:35:05" (1/1) ... [2024-11-09 06:35:05,783 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 06:35:05" (1/1) ... [2024-11-09 06:35:05,786 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-09 06:35:05,789 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-09 06:35:05,790 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-09 06:35:05,790 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-09 06:35:05,792 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 06:35:05" (1/1) ... [2024-11-09 06:35:05,800 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2024-11-09 06:35:05,826 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d62882a-abfe-4836-ac0c-7372735f477e/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 06:35:05,842 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d62882a-abfe-4836-ac0c-7372735f477e/bin/utaipan-verify-YMUCfTKeje/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2024-11-09 06:35:05,846 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d62882a-abfe-4836-ac0c-7372735f477e/bin/utaipan-verify-YMUCfTKeje/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2024-11-09 06:35:05,895 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-09 06:35:05,896 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2024-11-09 06:35:05,896 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-11-09 06:35:05,899 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2024-11-09 06:35:05,899 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-09 06:35:05,900 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-09 06:35:05,900 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2024-11-09 06:35:05,900 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-11-09 06:35:06,020 INFO L238 CfgBuilder]: Building ICFG [2024-11-09 06:35:06,023 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-09 06:35:06,375 INFO L? ?]: Removed 17 outVars from TransFormulas that were not future-live. [2024-11-09 06:35:06,375 INFO L287 CfgBuilder]: Performing block encoding [2024-11-09 06:35:06,475 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-09 06:35:06,475 INFO L316 CfgBuilder]: Removed 0 assume(true) statements. [2024-11-09 06:35:06,476 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.11 06:35:06 BoogieIcfgContainer [2024-11-09 06:35:06,476 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-09 06:35:06,481 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-09 06:35:06,482 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-09 06:35:06,487 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-09 06:35:06,487 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.11 06:35:05" (1/3) ... [2024-11-09 06:35:06,488 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@57b2a2bc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.11 06:35:06, skipping insertion in model container [2024-11-09 06:35:06,489 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 06:35:05" (2/3) ... [2024-11-09 06:35:06,489 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@57b2a2bc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.11 06:35:06, skipping insertion in model container [2024-11-09 06:35:06,490 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.11 06:35:06" (3/3) ... [2024-11-09 06:35:06,491 INFO L112 eAbstractionObserver]: Analyzing ICFG sorting_bubblesort_2_ground.i [2024-11-09 06:35:06,519 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-09 06:35:06,520 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-11-09 06:35:06,666 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-09 06:35:06,680 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;@1171e83f, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-09 06:35:06,680 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-11-09 06:35:06,687 INFO L276 IsEmpty]: Start isEmpty. Operand has 21 states, 19 states have (on average 1.631578947368421) internal successors, (31), 20 states have internal predecessors, (31), 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 06:35:06,696 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2024-11-09 06:35:06,697 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 06:35:06,698 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 06:35:06,699 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 06:35:06,707 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 06:35:06,708 INFO L85 PathProgramCache]: Analyzing trace with hash -728879768, now seen corresponding path program 1 times [2024-11-09 06:35:06,722 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 06:35:06,723 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [273386809] [2024-11-09 06:35:06,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:35:06,724 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 06:35:06,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:35:07,095 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 06:35:07,095 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 06:35:07,100 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [273386809] [2024-11-09 06:35:07,101 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [273386809] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 06:35:07,104 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 06:35:07,105 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-09 06:35:07,107 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [153091933] [2024-11-09 06:35:07,108 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 06:35:07,114 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-09 06:35:07,114 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 06:35:07,140 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-09 06:35:07,141 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-09 06:35:07,144 INFO L87 Difference]: Start difference. First operand has 21 states, 19 states have (on average 1.631578947368421) internal successors, (31), 20 states have internal predecessors, (31), 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 3.6666666666666665) internal successors, (11), 2 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 06:35:07,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 06:35:07,212 INFO L93 Difference]: Finished difference Result 41 states and 61 transitions. [2024-11-09 06:35:07,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-09 06:35:07,220 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 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 06:35:07,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 06:35:07,241 INFO L225 Difference]: With dead ends: 41 [2024-11-09 06:35:07,241 INFO L226 Difference]: Without dead ends: 21 [2024-11-09 06:35:07,246 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 06:35:07,254 INFO L432 NwaCegarLoop]: 25 mSDtfsCounter, 1 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-09 06:35:07,256 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 47 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-09 06:35:07,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2024-11-09 06:35:07,302 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2024-11-09 06:35:07,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 20 states have (on average 1.45) internal successors, (29), 20 states have internal predecessors, (29), 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 06:35:07,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 29 transitions. [2024-11-09 06:35:07,310 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 29 transitions. Word has length 11 [2024-11-09 06:35:07,310 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 06:35:07,311 INFO L471 AbstractCegarLoop]: Abstraction has 21 states and 29 transitions. [2024-11-09 06:35:07,311 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 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 06:35:07,311 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 29 transitions. [2024-11-09 06:35:07,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2024-11-09 06:35:07,313 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 06:35:07,313 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 06:35:07,313 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-09 06:35:07,314 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 06:35:07,314 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 06:35:07,314 INFO L85 PathProgramCache]: Analyzing trace with hash 1791163885, now seen corresponding path program 1 times [2024-11-09 06:35:07,315 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 06:35:07,315 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [561760728] [2024-11-09 06:35:07,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:35:07,316 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 06:35:07,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:35:07,465 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 06:35:07,465 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 06:35:07,465 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [561760728] [2024-11-09 06:35:07,466 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [561760728] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 06:35:07,466 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1710694497] [2024-11-09 06:35:07,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:35:07,467 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 06:35:07,467 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d62882a-abfe-4836-ac0c-7372735f477e/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 06:35:07,470 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d62882a-abfe-4836-ac0c-7372735f477e/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 06:35:07,472 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d62882a-abfe-4836-ac0c-7372735f477e/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-09 06:35:07,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:35:07,565 INFO L255 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-11-09 06:35:07,571 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 06:35:07,600 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-09 06:35:07,600 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-09 06:35:07,601 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1710694497] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 06:35:07,601 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-09 06:35:07,601 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2024-11-09 06:35:07,602 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [629900162] [2024-11-09 06:35:07,603 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 06:35:07,603 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-09 06:35:07,604 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 06:35:07,604 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-09 06:35:07,605 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-09 06:35:07,605 INFO L87 Difference]: Start difference. First operand 21 states and 29 transitions. Second operand has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 06:35:07,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 06:35:07,660 INFO L93 Difference]: Finished difference Result 33 states and 45 transitions. [2024-11-09 06:35:07,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-09 06:35:07,661 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2024-11-09 06:35:07,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 06:35:07,661 INFO L225 Difference]: With dead ends: 33 [2024-11-09 06:35:07,662 INFO L226 Difference]: Without dead ends: 23 [2024-11-09 06:35:07,662 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-09 06:35:07,664 INFO L432 NwaCegarLoop]: 23 mSDtfsCounter, 1 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 43 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 06:35:07,665 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 43 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-09 06:35:07,666 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2024-11-09 06:35:07,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2024-11-09 06:35:07,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 22 states have (on average 1.4090909090909092) internal successors, (31), 22 states have internal predecessors, (31), 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 06:35:07,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 31 transitions. [2024-11-09 06:35:07,675 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 31 transitions. Word has length 13 [2024-11-09 06:35:07,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 06:35:07,678 INFO L471 AbstractCegarLoop]: Abstraction has 23 states and 31 transitions. [2024-11-09 06:35:07,678 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 06:35:07,679 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 31 transitions. [2024-11-09 06:35:07,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2024-11-09 06:35:07,680 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 06:35:07,681 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 06:35:07,711 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d62882a-abfe-4836-ac0c-7372735f477e/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-09 06:35:07,885 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d62882a-abfe-4836-ac0c-7372735f477e/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 06:35:07,886 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 06:35:07,886 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 06:35:07,887 INFO L85 PathProgramCache]: Analyzing trace with hash 1886798292, now seen corresponding path program 1 times [2024-11-09 06:35:07,887 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 06:35:07,887 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1168339506] [2024-11-09 06:35:07,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:35:07,888 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 06:35:07,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:35:08,014 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-09 06:35:08,015 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 06:35:08,015 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1168339506] [2024-11-09 06:35:08,015 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1168339506] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 06:35:08,015 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1555931754] [2024-11-09 06:35:08,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:35:08,016 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 06:35:08,016 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d62882a-abfe-4836-ac0c-7372735f477e/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 06:35:08,020 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d62882a-abfe-4836-ac0c-7372735f477e/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 06:35:08,022 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d62882a-abfe-4836-ac0c-7372735f477e/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-09 06:35:08,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:35:08,136 INFO L255 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-11-09 06:35:08,138 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 06:35:08,153 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-09 06:35:08,153 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-09 06:35:08,153 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1555931754] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 06:35:08,154 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-09 06:35:08,154 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2024-11-09 06:35:08,154 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [373317222] [2024-11-09 06:35:08,155 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 06:35:08,155 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-09 06:35:08,156 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 06:35:08,156 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-09 06:35:08,157 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-09 06:35:08,157 INFO L87 Difference]: Start difference. First operand 23 states and 31 transitions. Second operand has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 3 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 06:35:08,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 06:35:08,201 INFO L93 Difference]: Finished difference Result 40 states and 56 transitions. [2024-11-09 06:35:08,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-09 06:35:08,202 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 3 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) Word has length 17 [2024-11-09 06:35:08,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 06:35:08,203 INFO L225 Difference]: With dead ends: 40 [2024-11-09 06:35:08,203 INFO L226 Difference]: Without dead ends: 25 [2024-11-09 06:35:08,204 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-09 06:35:08,205 INFO L432 NwaCegarLoop]: 24 mSDtfsCounter, 1 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-09 06:35:08,207 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 44 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-09 06:35:08,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2024-11-09 06:35:08,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2024-11-09 06:35:08,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 24 states have (on average 1.375) internal successors, (33), 24 states have internal predecessors, (33), 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 06:35:08,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 33 transitions. [2024-11-09 06:35:08,223 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 33 transitions. Word has length 17 [2024-11-09 06:35:08,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 06:35:08,223 INFO L471 AbstractCegarLoop]: Abstraction has 25 states and 33 transitions. [2024-11-09 06:35:08,223 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 3 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 06:35:08,224 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 33 transitions. [2024-11-09 06:35:08,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2024-11-09 06:35:08,224 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 06:35:08,224 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 06:35:08,254 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d62882a-abfe-4836-ac0c-7372735f477e/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-11-09 06:35:08,425 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d62882a-abfe-4836-ac0c-7372735f477e/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 06:35:08,425 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 06:35:08,426 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 06:35:08,427 INFO L85 PathProgramCache]: Analyzing trace with hash -1031305387, now seen corresponding path program 1 times [2024-11-09 06:35:08,427 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 06:35:08,427 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [644953137] [2024-11-09 06:35:08,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:35:08,428 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 06:35:08,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:35:08,640 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 06:35:08,640 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 06:35:08,641 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [644953137] [2024-11-09 06:35:08,641 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [644953137] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 06:35:08,641 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [664059762] [2024-11-09 06:35:08,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:35:08,642 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 06:35:08,642 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d62882a-abfe-4836-ac0c-7372735f477e/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 06:35:08,646 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d62882a-abfe-4836-ac0c-7372735f477e/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 06:35:08,648 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d62882a-abfe-4836-ac0c-7372735f477e/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-09 06:35:08,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:35:08,720 INFO L255 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-11-09 06:35:08,723 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 06:35:08,785 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 06:35:08,785 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 06:35:08,830 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 06:35:08,831 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [664059762] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 06:35:08,831 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1871391043] [2024-11-09 06:35:08,860 INFO L159 IcfgInterpreter]: Started Sifa with 17 locations of interest [2024-11-09 06:35:08,860 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 06:35:08,866 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 06:35:08,874 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 06:35:08,875 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 06:35:09,959 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 06:35:10,194 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '473#(and (<= (+ (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) (+ |ULTIMATE.start_main_~#a~0#1.offset| 4)) 1) (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) |ULTIMATE.start_main_~#a~0#1.offset|)) (= |ULTIMATE.start_main_~y~0#1| 1) (= |ULTIMATE.start_main_~x~0#1| 0))' at error location [2024-11-09 06:35:10,195 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 06:35:10,195 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 06:35:10,196 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2024-11-09 06:35:10,196 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1191619619] [2024-11-09 06:35:10,196 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 06:35:10,198 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-09 06:35:10,198 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 06:35:10,200 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-09 06:35:10,202 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2024-11-09 06:35:10,202 INFO L87 Difference]: Start difference. First operand 25 states and 33 transitions. Second operand has 7 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 6 states have internal predecessors, (26), 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 06:35:10,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 06:35:10,285 INFO L93 Difference]: Finished difference Result 50 states and 69 transitions. [2024-11-09 06:35:10,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-09 06:35:10,286 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 6 states have internal predecessors, (26), 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 06:35:10,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 06:35:10,287 INFO L225 Difference]: With dead ends: 50 [2024-11-09 06:35:10,287 INFO L226 Difference]: Without dead ends: 30 [2024-11-09 06:35:10,288 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2024-11-09 06:35:10,289 INFO L432 NwaCegarLoop]: 22 mSDtfsCounter, 2 mSDsluCounter, 60 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 82 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-09 06:35:10,289 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 82 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-09 06:35:10,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2024-11-09 06:35:10,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2024-11-09 06:35:10,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 29 states have (on average 1.2758620689655173) internal successors, (37), 29 states have internal predecessors, (37), 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 06:35:10,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 37 transitions. [2024-11-09 06:35:10,298 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 37 transitions. Word has length 19 [2024-11-09 06:35:10,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 06:35:10,299 INFO L471 AbstractCegarLoop]: Abstraction has 30 states and 37 transitions. [2024-11-09 06:35:10,299 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 6 states have internal predecessors, (26), 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 06:35:10,300 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 37 transitions. [2024-11-09 06:35:10,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2024-11-09 06:35:10,301 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 06:35:10,301 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 06:35:10,328 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d62882a-abfe-4836-ac0c-7372735f477e/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-11-09 06:35:10,505 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d62882a-abfe-4836-ac0c-7372735f477e/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 06:35:10,506 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 06:35:10,506 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 06:35:10,506 INFO L85 PathProgramCache]: Analyzing trace with hash 1598743076, now seen corresponding path program 2 times [2024-11-09 06:35:10,507 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 06:35:10,507 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [333042332] [2024-11-09 06:35:10,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:35:10,507 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 06:35:10,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:35:10,712 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-11-09 06:35:10,713 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 06:35:10,713 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [333042332] [2024-11-09 06:35:10,713 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [333042332] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 06:35:10,714 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [462586078] [2024-11-09 06:35:10,714 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-09 06:35:10,714 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 06:35:10,714 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d62882a-abfe-4836-ac0c-7372735f477e/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 06:35:10,717 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d62882a-abfe-4836-ac0c-7372735f477e/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 06:35:10,720 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d62882a-abfe-4836-ac0c-7372735f477e/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-09 06:35:10,834 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-11-09 06:35:10,834 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 06:35:10,837 INFO L255 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-11-09 06:35:10,838 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 06:35:10,864 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-11-09 06:35:10,865 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 06:35:10,918 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-11-09 06:35:10,918 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [462586078] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 06:35:10,919 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [984402587] [2024-11-09 06:35:10,924 INFO L159 IcfgInterpreter]: Started Sifa with 17 locations of interest [2024-11-09 06:35:10,924 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 06:35:10,925 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 06:35:10,925 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 06:35:10,925 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 06:35:11,457 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 06:35:11,646 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '741#(and (<= (+ (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) (+ |ULTIMATE.start_main_~#a~0#1.offset| 4)) 1) (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) |ULTIMATE.start_main_~#a~0#1.offset|)) (= |ULTIMATE.start_main_~y~0#1| 1) (= |ULTIMATE.start_main_~x~0#1| 0))' at error location [2024-11-09 06:35:11,646 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 06:35:11,646 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 06:35:11,647 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2024-11-09 06:35:11,647 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [315808121] [2024-11-09 06:35:11,647 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 06:35:11,647 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-09 06:35:11,648 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 06:35:11,648 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-09 06:35:11,648 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2024-11-09 06:35:11,649 INFO L87 Difference]: Start difference. First operand 30 states and 37 transitions. Second operand has 7 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 7 states have internal predecessors, (26), 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 06:35:11,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 06:35:11,712 INFO L93 Difference]: Finished difference Result 52 states and 70 transitions. [2024-11-09 06:35:11,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-09 06:35:11,714 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 7 states have internal predecessors, (26), 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 06:35:11,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 06:35:11,715 INFO L225 Difference]: With dead ends: 52 [2024-11-09 06:35:11,716 INFO L226 Difference]: Without dead ends: 35 [2024-11-09 06:35:11,716 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2024-11-09 06:35:11,717 INFO L432 NwaCegarLoop]: 22 mSDtfsCounter, 2 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-09 06:35:11,720 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 60 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-09 06:35:11,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2024-11-09 06:35:11,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2024-11-09 06:35:11,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 34 states have (on average 1.2058823529411764) internal successors, (41), 34 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 06:35:11,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 41 transitions. [2024-11-09 06:35:11,729 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 41 transitions. Word has length 25 [2024-11-09 06:35:11,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 06:35:11,730 INFO L471 AbstractCegarLoop]: Abstraction has 35 states and 41 transitions. [2024-11-09 06:35:11,730 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 7 states have internal predecessors, (26), 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 06:35:11,730 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 41 transitions. [2024-11-09 06:35:11,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2024-11-09 06:35:11,731 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 06:35:11,731 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 06:35:11,757 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d62882a-abfe-4836-ac0c-7372735f477e/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-11-09 06:35:11,935 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d62882a-abfe-4836-ac0c-7372735f477e/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 06:35:11,935 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 06:35:11,936 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 06:35:11,936 INFO L85 PathProgramCache]: Analyzing trace with hash 1999450599, now seen corresponding path program 3 times [2024-11-09 06:35:11,936 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 06:35:11,936 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [553685951] [2024-11-09 06:35:11,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:35:11,937 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 06:35:11,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:35:12,215 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2024-11-09 06:35:12,215 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 06:35:12,215 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [553685951] [2024-11-09 06:35:12,215 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [553685951] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 06:35:12,216 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [839535258] [2024-11-09 06:35:12,216 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-09 06:35:12,216 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 06:35:12,216 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d62882a-abfe-4836-ac0c-7372735f477e/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 06:35:12,218 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d62882a-abfe-4836-ac0c-7372735f477e/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 06:35:12,220 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d62882a-abfe-4836-ac0c-7372735f477e/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-09 06:35:12,328 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-09 06:35:12,328 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 06:35:12,331 INFO L255 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-09 06:35:12,333 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 06:35:12,365 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2024-11-09 06:35:12,365 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 06:35:12,459 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2024-11-09 06:35:12,459 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [839535258] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 06:35:12,459 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [832526527] [2024-11-09 06:35:12,462 INFO L159 IcfgInterpreter]: Started Sifa with 17 locations of interest [2024-11-09 06:35:12,463 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 06:35:12,463 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 06:35:12,463 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 06:35:12,463 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 06:35:12,880 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 06:35:13,090 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1062#(and (<= (+ (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) (+ |ULTIMATE.start_main_~#a~0#1.offset| 4)) 1) (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) |ULTIMATE.start_main_~#a~0#1.offset|)) (= |ULTIMATE.start_main_~y~0#1| 1) (= |ULTIMATE.start_main_~x~0#1| 0))' at error location [2024-11-09 06:35:13,090 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 06:35:13,091 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 06:35:13,091 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2024-11-09 06:35:13,091 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [194860077] [2024-11-09 06:35:13,091 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 06:35:13,092 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-11-09 06:35:13,092 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 06:35:13,093 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-11-09 06:35:13,093 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=357, Unknown=0, NotChecked=0, Total=462 [2024-11-09 06:35:13,093 INFO L87 Difference]: Start difference. First operand 35 states and 41 transitions. Second operand has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 12 states have internal predecessors, (38), 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 06:35:13,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 06:35:13,167 INFO L93 Difference]: Finished difference Result 72 states and 89 transitions. [2024-11-09 06:35:13,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-11-09 06:35:13,168 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 12 states have internal predecessors, (38), 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 31 [2024-11-09 06:35:13,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 06:35:13,169 INFO L225 Difference]: With dead ends: 72 [2024-11-09 06:35:13,169 INFO L226 Difference]: Without dead ends: 47 [2024-11-09 06:35:13,170 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 164 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=105, Invalid=357, Unknown=0, NotChecked=0, Total=462 [2024-11-09 06:35:13,171 INFO L432 NwaCegarLoop]: 21 mSDtfsCounter, 2 mSDsluCounter, 76 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 97 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-09 06:35:13,171 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 97 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-09 06:35:13,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2024-11-09 06:35:13,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2024-11-09 06:35:13,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 46 states have (on average 1.1521739130434783) internal successors, (53), 46 states have internal predecessors, (53), 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 06:35:13,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 53 transitions. [2024-11-09 06:35:13,178 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 53 transitions. Word has length 31 [2024-11-09 06:35:13,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 06:35:13,179 INFO L471 AbstractCegarLoop]: Abstraction has 47 states and 53 transitions. [2024-11-09 06:35:13,179 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 12 states have internal predecessors, (38), 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 06:35:13,179 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 53 transitions. [2024-11-09 06:35:13,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2024-11-09 06:35:13,180 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 06:35:13,180 INFO L215 NwaCegarLoop]: trace histogram [10, 10, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 06:35:13,206 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d62882a-abfe-4836-ac0c-7372735f477e/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-11-09 06:35:13,384 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d62882a-abfe-4836-ac0c-7372735f477e/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 06:35:13,384 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 06:35:13,385 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 06:35:13,385 INFO L85 PathProgramCache]: Analyzing trace with hash 953267013, now seen corresponding path program 4 times [2024-11-09 06:35:13,385 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 06:35:13,385 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1433255633] [2024-11-09 06:35:13,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:35:13,386 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 06:35:13,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:35:13,753 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2024-11-09 06:35:13,753 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 06:35:13,754 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1433255633] [2024-11-09 06:35:13,754 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1433255633] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 06:35:13,754 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1243353700] [2024-11-09 06:35:13,754 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-09 06:35:13,754 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 06:35:13,755 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d62882a-abfe-4836-ac0c-7372735f477e/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 06:35:13,757 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d62882a-abfe-4836-ac0c-7372735f477e/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 06:35:13,759 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d62882a-abfe-4836-ac0c-7372735f477e/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-09 06:35:13,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:35:13,891 INFO L255 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-11-09 06:35:13,894 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 06:35:13,969 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2024-11-09 06:35:13,969 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 06:35:14,314 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2024-11-09 06:35:14,314 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1243353700] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 06:35:14,315 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [671434432] [2024-11-09 06:35:14,317 INFO L159 IcfgInterpreter]: Started Sifa with 17 locations of interest [2024-11-09 06:35:14,318 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 06:35:14,318 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 06:35:14,318 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 06:35:14,318 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 06:35:14,624 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 06:35:14,876 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1516#(and (<= (+ (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) (+ |ULTIMATE.start_main_~#a~0#1.offset| 4)) 1) (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) |ULTIMATE.start_main_~#a~0#1.offset|)) (= |ULTIMATE.start_main_~y~0#1| 1) (= |ULTIMATE.start_main_~x~0#1| 0))' at error location [2024-11-09 06:35:14,876 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 06:35:14,876 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 06:35:14,876 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 24 [2024-11-09 06:35:14,877 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [297834208] [2024-11-09 06:35:14,877 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 06:35:14,877 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2024-11-09 06:35:14,878 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 06:35:14,878 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2024-11-09 06:35:14,879 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=327, Invalid=795, Unknown=0, NotChecked=0, Total=1122 [2024-11-09 06:35:14,880 INFO L87 Difference]: Start difference. First operand 47 states and 53 transitions. Second operand has 25 states, 25 states have (on average 2.48) internal successors, (62), 24 states have internal predecessors, (62), 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 06:35:15,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 06:35:15,001 INFO L93 Difference]: Finished difference Result 96 states and 119 transitions. [2024-11-09 06:35:15,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2024-11-09 06:35:15,002 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.48) internal successors, (62), 24 states have internal predecessors, (62), 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 43 [2024-11-09 06:35:15,002 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 06:35:15,003 INFO L225 Difference]: With dead ends: 96 [2024-11-09 06:35:15,003 INFO L226 Difference]: Without dead ends: 71 [2024-11-09 06:35:15,004 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 107 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 350 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=327, Invalid=795, Unknown=0, NotChecked=0, Total=1122 [2024-11-09 06:35:15,005 INFO L432 NwaCegarLoop]: 21 mSDtfsCounter, 2 mSDsluCounter, 76 mSDsCounter, 0 mSdLazyCounter, 61 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 97 SdHoareTripleChecker+Invalid, 63 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 61 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-09 06:35:15,006 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 97 Invalid, 63 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 61 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-09 06:35:15,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2024-11-09 06:35:15,012 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 71. [2024-11-09 06:35:15,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 70 states have (on average 1.1) internal successors, (77), 70 states have internal predecessors, (77), 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 06:35:15,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 77 transitions. [2024-11-09 06:35:15,014 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 77 transitions. Word has length 43 [2024-11-09 06:35:15,014 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 06:35:15,014 INFO L471 AbstractCegarLoop]: Abstraction has 71 states and 77 transitions. [2024-11-09 06:35:15,015 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.48) internal successors, (62), 24 states have internal predecessors, (62), 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 06:35:15,015 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 77 transitions. [2024-11-09 06:35:15,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2024-11-09 06:35:15,017 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 06:35:15,017 INFO L215 NwaCegarLoop]: trace histogram [22, 22, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 06:35:15,037 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d62882a-abfe-4836-ac0c-7372735f477e/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-11-09 06:35:15,221 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d62882a-abfe-4836-ac0c-7372735f477e/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 06:35:15,221 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 06:35:15,222 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 06:35:15,222 INFO L85 PathProgramCache]: Analyzing trace with hash 889642753, now seen corresponding path program 5 times [2024-11-09 06:35:15,222 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 06:35:15,222 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [595688678] [2024-11-09 06:35:15,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:35:15,222 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 06:35:15,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:35:16,297 INFO L134 CoverageAnalysis]: Checked inductivity of 501 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2024-11-09 06:35:16,297 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 06:35:16,297 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [595688678] [2024-11-09 06:35:16,298 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [595688678] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 06:35:16,298 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1923634732] [2024-11-09 06:35:16,298 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-09 06:35:16,298 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 06:35:16,298 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d62882a-abfe-4836-ac0c-7372735f477e/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 06:35:16,299 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d62882a-abfe-4836-ac0c-7372735f477e/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 06:35:16,301 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d62882a-abfe-4836-ac0c-7372735f477e/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-09 06:35:16,456 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2024-11-09 06:35:16,456 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 06:35:16,457 INFO L255 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-09 06:35:16,460 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 06:35:16,606 INFO L134 CoverageAnalysis]: Checked inductivity of 501 backedges. 1 proven. 16 refuted. 0 times theorem prover too weak. 484 trivial. 0 not checked. [2024-11-09 06:35:16,606 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 06:35:16,792 INFO L134 CoverageAnalysis]: Checked inductivity of 501 backedges. 1 proven. 16 refuted. 0 times theorem prover too weak. 484 trivial. 0 not checked. [2024-11-09 06:35:16,792 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1923634732] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 06:35:16,792 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2072157770] [2024-11-09 06:35:16,795 INFO L159 IcfgInterpreter]: Started Sifa with 17 locations of interest [2024-11-09 06:35:16,796 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 06:35:16,796 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 06:35:16,796 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 06:35:16,797 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 06:35:17,163 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 06:35:17,521 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2196#(and (<= (+ (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) (+ |ULTIMATE.start_main_~#a~0#1.offset| 4)) 1) (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) |ULTIMATE.start_main_~#a~0#1.offset|)) (= |ULTIMATE.start_main_~y~0#1| 1) (= |ULTIMATE.start_main_~x~0#1| 0))' at error location [2024-11-09 06:35:17,521 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 06:35:17,521 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 06:35:17,521 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 7, 7] total 35 [2024-11-09 06:35:17,522 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1228815692] [2024-11-09 06:35:17,522 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 06:35:17,523 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2024-11-09 06:35:17,523 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 06:35:17,524 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2024-11-09 06:35:17,525 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=389, Invalid=1417, Unknown=0, NotChecked=0, Total=1806 [2024-11-09 06:35:17,526 INFO L87 Difference]: Start difference. First operand 71 states and 77 transitions. Second operand has 35 states, 35 states have (on average 2.4857142857142858) internal successors, (87), 35 states have internal predecessors, (87), 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 06:35:17,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 06:35:17,708 INFO L93 Difference]: Finished difference Result 111 states and 129 transitions. [2024-11-09 06:35:17,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2024-11-09 06:35:17,709 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.4857142857142858) internal successors, (87), 35 states have internal predecessors, (87), 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 06:35:17,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 06:35:17,711 INFO L225 Difference]: With dead ends: 111 [2024-11-09 06:35:17,711 INFO L226 Difference]: Without dead ends: 86 [2024-11-09 06:35:17,712 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 223 GetRequests, 182 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 512 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=389, Invalid=1417, Unknown=0, NotChecked=0, Total=1806 [2024-11-09 06:35:17,713 INFO L432 NwaCegarLoop]: 20 mSDtfsCounter, 3 mSDsluCounter, 105 mSDsCounter, 0 mSdLazyCounter, 97 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 125 SdHoareTripleChecker+Invalid, 99 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 97 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-09 06:35:17,714 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 125 Invalid, 99 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 97 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-09 06:35:17,715 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2024-11-09 06:35:17,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 85. [2024-11-09 06:35:17,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 84 states have (on average 1.0833333333333333) internal successors, (91), 84 states have internal predecessors, (91), 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 06:35:17,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 91 transitions. [2024-11-09 06:35:17,725 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 91 transitions. Word has length 67 [2024-11-09 06:35:17,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 06:35:17,725 INFO L471 AbstractCegarLoop]: Abstraction has 85 states and 91 transitions. [2024-11-09 06:35:17,726 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 2.4857142857142858) internal successors, (87), 35 states have internal predecessors, (87), 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 06:35:17,726 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 91 transitions. [2024-11-09 06:35:17,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2024-11-09 06:35:17,729 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 06:35:17,729 INFO L215 NwaCegarLoop]: trace histogram [23, 23, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 06:35:17,756 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d62882a-abfe-4836-ac0c-7372735f477e/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-11-09 06:35:17,929 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d62882a-abfe-4836-ac0c-7372735f477e/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2024-11-09 06:35:17,930 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 06:35:17,930 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 06:35:17,931 INFO L85 PathProgramCache]: Analyzing trace with hash 1277319884, now seen corresponding path program 6 times [2024-11-09 06:35:17,931 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 06:35:17,931 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [754048026] [2024-11-09 06:35:17,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:35:17,931 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 06:35:17,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:35:19,113 INFO L134 CoverageAnalysis]: Checked inductivity of 630 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 101 trivial. 0 not checked. [2024-11-09 06:35:19,113 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 06:35:19,113 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [754048026] [2024-11-09 06:35:19,113 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [754048026] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 06:35:19,114 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [735771182] [2024-11-09 06:35:19,114 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-09 06:35:19,114 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 06:35:19,114 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d62882a-abfe-4836-ac0c-7372735f477e/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 06:35:19,116 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d62882a-abfe-4836-ac0c-7372735f477e/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 06:35:19,119 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d62882a-abfe-4836-ac0c-7372735f477e/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-09 06:35:19,324 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-09 06:35:19,325 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 06:35:19,327 INFO L255 TraceCheckSpWp]: Trace formula consists of 393 conjuncts, 25 conjuncts are in the unsatisfiable core [2024-11-09 06:35:19,331 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 06:35:19,443 INFO L134 CoverageAnalysis]: Checked inductivity of 630 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 101 trivial. 0 not checked. [2024-11-09 06:35:19,444 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 06:35:20,655 INFO L134 CoverageAnalysis]: Checked inductivity of 630 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 101 trivial. 0 not checked. [2024-11-09 06:35:20,656 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [735771182] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 06:35:20,656 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1049745806] [2024-11-09 06:35:20,659 INFO L159 IcfgInterpreter]: Started Sifa with 17 locations of interest [2024-11-09 06:35:20,659 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 06:35:20,659 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 06:35:20,660 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 06:35:20,660 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 06:35:20,953 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 06:35:21,214 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3018#(and (<= (+ (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) (+ |ULTIMATE.start_main_~#a~0#1.offset| 4)) 1) (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) |ULTIMATE.start_main_~#a~0#1.offset|)) (= |ULTIMATE.start_main_~y~0#1| 1) (= |ULTIMATE.start_main_~x~0#1| 0))' at error location [2024-11-09 06:35:21,215 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 06:35:21,215 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 06:35:21,215 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25] total 50 [2024-11-09 06:35:21,215 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1413700823] [2024-11-09 06:35:21,215 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 06:35:21,216 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2024-11-09 06:35:21,216 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 06:35:21,218 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2024-11-09 06:35:21,219 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1302, Invalid=2238, Unknown=0, NotChecked=0, Total=3540 [2024-11-09 06:35:21,220 INFO L87 Difference]: Start difference. First operand 85 states and 91 transitions. Second operand has 51 states, 51 states have (on average 2.235294117647059) internal successors, (114), 50 states have internal predecessors, (114), 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 06:35:21,491 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 06:35:21,491 INFO L93 Difference]: Finished difference Result 172 states and 208 transitions. [2024-11-09 06:35:21,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2024-11-09 06:35:21,493 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 2.235294117647059) internal successors, (114), 50 states have internal predecessors, (114), 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 81 [2024-11-09 06:35:21,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 06:35:21,497 INFO L225 Difference]: With dead ends: 172 [2024-11-09 06:35:21,501 INFO L226 Difference]: Without dead ends: 135 [2024-11-09 06:35:21,502 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 266 GetRequests, 208 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 753 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=1302, Invalid=2238, Unknown=0, NotChecked=0, Total=3540 [2024-11-09 06:35:21,503 INFO L432 NwaCegarLoop]: 21 mSDtfsCounter, 2 mSDsluCounter, 76 mSDsCounter, 0 mSdLazyCounter, 111 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 97 SdHoareTripleChecker+Invalid, 113 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 111 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-09 06:35:21,504 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 97 Invalid, 113 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 111 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-09 06:35:21,505 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2024-11-09 06:35:21,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 135. [2024-11-09 06:35:21,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135 states, 134 states have (on average 1.0522388059701493) internal successors, (141), 134 states have internal predecessors, (141), 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 06:35:21,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 141 transitions. [2024-11-09 06:35:21,531 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 141 transitions. Word has length 81 [2024-11-09 06:35:21,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 06:35:21,532 INFO L471 AbstractCegarLoop]: Abstraction has 135 states and 141 transitions. [2024-11-09 06:35:21,532 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 2.235294117647059) internal successors, (114), 50 states have internal predecessors, (114), 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 06:35:21,532 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 141 transitions. [2024-11-09 06:35:21,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2024-11-09 06:35:21,537 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 06:35:21,537 INFO L215 NwaCegarLoop]: trace histogram [48, 48, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 06:35:21,564 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d62882a-abfe-4836-ac0c-7372735f477e/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2024-11-09 06:35:21,737 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d62882a-abfe-4836-ac0c-7372735f477e/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2024-11-09 06:35:21,738 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 06:35:21,739 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 06:35:21,739 INFO L85 PathProgramCache]: Analyzing trace with hash 2025215753, now seen corresponding path program 7 times [2024-11-09 06:35:21,739 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 06:35:21,739 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1953808690] [2024-11-09 06:35:21,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:35:21,740 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 06:35:21,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:35:25,295 INFO L134 CoverageAnalysis]: Checked inductivity of 2405 backedges. 0 proven. 2304 refuted. 0 times theorem prover too weak. 101 trivial. 0 not checked. [2024-11-09 06:35:25,296 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 06:35:25,296 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1953808690] [2024-11-09 06:35:25,296 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1953808690] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 06:35:25,296 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [102315414] [2024-11-09 06:35:25,296 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-09 06:35:25,297 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 06:35:25,297 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d62882a-abfe-4836-ac0c-7372735f477e/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 06:35:25,299 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d62882a-abfe-4836-ac0c-7372735f477e/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 06:35:25,302 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d62882a-abfe-4836-ac0c-7372735f477e/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-11-09 06:35:25,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:35:25,600 INFO L255 TraceCheckSpWp]: Trace formula consists of 643 conjuncts, 50 conjuncts are in the unsatisfiable core [2024-11-09 06:35:25,606 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 06:35:25,845 INFO L134 CoverageAnalysis]: Checked inductivity of 2405 backedges. 0 proven. 2304 refuted. 0 times theorem prover too weak. 101 trivial. 0 not checked. [2024-11-09 06:35:25,846 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 06:35:29,976 INFO L134 CoverageAnalysis]: Checked inductivity of 2405 backedges. 0 proven. 2304 refuted. 0 times theorem prover too weak. 101 trivial. 0 not checked. [2024-11-09 06:35:29,976 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [102315414] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 06:35:29,976 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [3428583] [2024-11-09 06:35:29,979 INFO L159 IcfgInterpreter]: Started Sifa with 17 locations of interest [2024-11-09 06:35:29,979 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 06:35:29,979 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 06:35:29,980 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 06:35:29,980 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 06:35:30,304 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 06:35:30,742 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '4358#(and (<= (+ (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) (+ |ULTIMATE.start_main_~#a~0#1.offset| 4)) 1) (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) |ULTIMATE.start_main_~#a~0#1.offset|)) (= |ULTIMATE.start_main_~y~0#1| 1) (= |ULTIMATE.start_main_~x~0#1| 0))' at error location [2024-11-09 06:35:30,743 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 06:35:30,743 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 06:35:30,743 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 50, 50] total 100 [2024-11-09 06:35:30,743 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1983410388] [2024-11-09 06:35:30,744 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 06:35:30,744 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 101 states [2024-11-09 06:35:30,745 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 06:35:30,749 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 101 interpolants. [2024-11-09 06:35:30,752 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5077, Invalid=6913, Unknown=0, NotChecked=0, Total=11990 [2024-11-09 06:35:30,753 INFO L87 Difference]: Start difference. First operand 135 states and 141 transitions. Second operand has 101 states, 101 states have (on average 2.118811881188119) internal successors, (214), 100 states have internal predecessors, (214), 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 06:35:31,302 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 06:35:31,302 INFO L93 Difference]: Finished difference Result 272 states and 333 transitions. [2024-11-09 06:35:31,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 100 states. [2024-11-09 06:35:31,306 INFO L78 Accepts]: Start accepts. Automaton has has 101 states, 101 states have (on average 2.118811881188119) internal successors, (214), 100 states have internal predecessors, (214), 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 131 [2024-11-09 06:35:31,306 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 06:35:31,308 INFO L225 Difference]: With dead ends: 272 [2024-11-09 06:35:31,308 INFO L226 Difference]: Without dead ends: 235 [2024-11-09 06:35:31,314 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 441 GetRequests, 333 SyntacticMatches, 0 SemanticMatches, 108 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1528 ImplicationChecksByTransitivity, 5.8s TimeCoverageRelationStatistics Valid=5077, Invalid=6913, Unknown=0, NotChecked=0, Total=11990 [2024-11-09 06:35:31,315 INFO L432 NwaCegarLoop]: 21 mSDtfsCounter, 2 mSDsluCounter, 133 mSDsCounter, 0 mSdLazyCounter, 220 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 154 SdHoareTripleChecker+Invalid, 222 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 220 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-09 06:35:31,315 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 154 Invalid, 222 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 220 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-11-09 06:35:31,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 235 states. [2024-11-09 06:35:31,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 235 to 235. [2024-11-09 06:35:31,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 235 states, 234 states have (on average 1.0299145299145298) internal successors, (241), 234 states have internal predecessors, (241), 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 06:35:31,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 235 states to 235 states and 241 transitions. [2024-11-09 06:35:31,339 INFO L78 Accepts]: Start accepts. Automaton has 235 states and 241 transitions. Word has length 131 [2024-11-09 06:35:31,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 06:35:31,339 INFO L471 AbstractCegarLoop]: Abstraction has 235 states and 241 transitions. [2024-11-09 06:35:31,340 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 101 states, 101 states have (on average 2.118811881188119) internal successors, (214), 100 states have internal predecessors, (214), 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 06:35:31,340 INFO L276 IsEmpty]: Start isEmpty. Operand 235 states and 241 transitions. [2024-11-09 06:35:31,344 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 232 [2024-11-09 06:35:31,345 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 06:35:31,345 INFO L215 NwaCegarLoop]: trace histogram [98, 98, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 06:35:31,373 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d62882a-abfe-4836-ac0c-7372735f477e/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2024-11-09 06:35:31,549 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d62882a-abfe-4836-ac0c-7372735f477e/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2024-11-09 06:35:31,549 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 06:35:31,550 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 06:35:31,550 INFO L85 PathProgramCache]: Analyzing trace with hash -1592761405, now seen corresponding path program 8 times [2024-11-09 06:35:31,550 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 06:35:31,550 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1604575167] [2024-11-09 06:35:31,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:35:31,551 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 06:35:31,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:35:41,782 INFO L134 CoverageAnalysis]: Checked inductivity of 9705 backedges. 0 proven. 9604 refuted. 0 times theorem prover too weak. 101 trivial. 0 not checked. [2024-11-09 06:35:41,783 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 06:35:41,783 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1604575167] [2024-11-09 06:35:41,783 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1604575167] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 06:35:41,783 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [530622330] [2024-11-09 06:35:41,784 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-09 06:35:41,784 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 06:35:41,784 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d62882a-abfe-4836-ac0c-7372735f477e/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 06:35:41,785 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d62882a-abfe-4836-ac0c-7372735f477e/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 06:35:41,787 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d62882a-abfe-4836-ac0c-7372735f477e/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-11-09 06:35:43,464 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2024-11-09 06:35:43,464 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 06:35:43,469 INFO L255 TraceCheckSpWp]: Trace formula consists of 273 conjuncts, 15 conjuncts are in the unsatisfiable core [2024-11-09 06:35:43,477 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 06:35:44,305 INFO L134 CoverageAnalysis]: Checked inductivity of 9705 backedges. 99 proven. 100 refuted. 0 times theorem prover too weak. 9506 trivial. 0 not checked. [2024-11-09 06:35:44,306 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 06:35:45,153 INFO L134 CoverageAnalysis]: Checked inductivity of 9705 backedges. 1 proven. 100 refuted. 0 times theorem prover too weak. 9604 trivial. 0 not checked. [2024-11-09 06:35:45,153 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [530622330] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 06:35:45,153 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1827567840] [2024-11-09 06:35:45,156 INFO L159 IcfgInterpreter]: Started Sifa with 17 locations of interest [2024-11-09 06:35:45,157 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 06:35:45,157 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 06:35:45,158 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 06:35:45,158 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 06:35:45,446 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 06:35:46,214 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '6621#(and (<= (+ (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) (+ |ULTIMATE.start_main_~#a~0#1.offset| 4)) 1) (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) |ULTIMATE.start_main_~#a~0#1.offset|)) (= |ULTIMATE.start_main_~y~0#1| 1) (= |ULTIMATE.start_main_~x~0#1| 0))' at error location [2024-11-09 06:35:46,214 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 06:35:46,214 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 06:35:46,215 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [100, 14, 13] total 124 [2024-11-09 06:35:46,215 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1823155193] [2024-11-09 06:35:46,215 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 06:35:46,216 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 124 states [2024-11-09 06:35:46,216 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 06:35:46,219 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 124 interpolants. [2024-11-09 06:35:46,224 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5451, Invalid=11841, Unknown=0, NotChecked=0, Total=17292 [2024-11-09 06:35:46,225 INFO L87 Difference]: Start difference. First operand 235 states and 241 transitions. Second operand has 124 states, 124 states have (on average 2.1370967741935485) internal successors, (265), 124 states have internal predecessors, (265), 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 06:35:46,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 06:35:46,871 INFO L93 Difference]: Finished difference Result 299 states and 323 transitions. [2024-11-09 06:35:46,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 124 states. [2024-11-09 06:35:46,872 INFO L78 Accepts]: Start accepts. Automaton has has 124 states, 124 states have (on average 2.1370967741935485) internal successors, (265), 124 states have internal predecessors, (265), 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 231 [2024-11-09 06:35:46,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 06:35:46,874 INFO L225 Difference]: With dead ends: 299 [2024-11-09 06:35:46,874 INFO L226 Difference]: Without dead ends: 262 [2024-11-09 06:35:46,878 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 791 GetRequests, 661 SyntacticMatches, 0 SemanticMatches, 130 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3230 ImplicationChecksByTransitivity, 7.6s TimeCoverageRelationStatistics Valid=5451, Invalid=11841, Unknown=0, NotChecked=0, Total=17292 [2024-11-09 06:35:46,879 INFO L432 NwaCegarLoop]: 19 mSDtfsCounter, 4 mSDsluCounter, 156 mSDsCounter, 0 mSdLazyCounter, 289 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 175 SdHoareTripleChecker+Invalid, 291 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 289 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-09 06:35:46,880 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 175 Invalid, 291 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 289 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-11-09 06:35:46,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 262 states. [2024-11-09 06:35:46,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 262 to 261. [2024-11-09 06:35:46,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 261 states, 260 states have (on average 1.0269230769230768) internal successors, (267), 260 states have internal predecessors, (267), 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 06:35:46,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 261 states to 261 states and 267 transitions. [2024-11-09 06:35:46,900 INFO L78 Accepts]: Start accepts. Automaton has 261 states and 267 transitions. Word has length 231 [2024-11-09 06:35:46,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 06:35:46,901 INFO L471 AbstractCegarLoop]: Abstraction has 261 states and 267 transitions. [2024-11-09 06:35:46,902 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 124 states, 124 states have (on average 2.1370967741935485) internal successors, (265), 124 states have internal predecessors, (265), 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 06:35:46,902 INFO L276 IsEmpty]: Start isEmpty. Operand 261 states and 267 transitions. [2024-11-09 06:35:46,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 258 [2024-11-09 06:35:46,907 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 06:35:46,907 INFO L215 NwaCegarLoop]: trace histogram [99, 99, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 06:35:46,934 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d62882a-abfe-4836-ac0c-7372735f477e/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2024-11-09 06:35:47,108 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d62882a-abfe-4836-ac0c-7372735f477e/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2024-11-09 06:35:47,108 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 06:35:47,109 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 06:35:47,109 INFO L85 PathProgramCache]: Analyzing trace with hash 603164756, now seen corresponding path program 9 times [2024-11-09 06:35:47,109 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 06:35:47,109 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1969965479] [2024-11-09 06:35:47,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:35:47,110 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 06:35:47,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:35:57,461 INFO L134 CoverageAnalysis]: Checked inductivity of 10286 backedges. 0 proven. 9801 refuted. 0 times theorem prover too weak. 485 trivial. 0 not checked. [2024-11-09 06:35:57,462 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 06:35:57,462 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1969965479] [2024-11-09 06:35:57,462 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1969965479] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 06:35:57,463 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [168876552] [2024-11-09 06:35:57,463 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-09 06:35:57,463 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 06:35:57,463 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d62882a-abfe-4836-ac0c-7372735f477e/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 06:35:57,465 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d62882a-abfe-4836-ac0c-7372735f477e/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 06:35:57,466 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d62882a-abfe-4836-ac0c-7372735f477e/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-11-09 06:35:58,021 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-09 06:35:58,021 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 06:35:58,030 INFO L255 TraceCheckSpWp]: Trace formula consists of 1273 conjuncts, 101 conjuncts are in the unsatisfiable core [2024-11-09 06:35:58,037 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 06:35:58,458 INFO L134 CoverageAnalysis]: Checked inductivity of 10286 backedges. 0 proven. 9801 refuted. 0 times theorem prover too weak. 485 trivial. 0 not checked. [2024-11-09 06:35:58,458 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 06:36:13,692 INFO L134 CoverageAnalysis]: Checked inductivity of 10286 backedges. 0 proven. 9801 refuted. 0 times theorem prover too weak. 485 trivial. 0 not checked. [2024-11-09 06:36:13,692 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [168876552] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 06:36:13,692 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [738407230] [2024-11-09 06:36:13,695 INFO L159 IcfgInterpreter]: Started Sifa with 17 locations of interest [2024-11-09 06:36:13,695 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 06:36:13,696 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 06:36:13,696 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 06:36:13,696 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 06:36:13,966 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 06:36:14,620 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '9197#(and (<= (+ (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) (+ |ULTIMATE.start_main_~#a~0#1.offset| 4)) 1) (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) |ULTIMATE.start_main_~#a~0#1.offset|)) (= |ULTIMATE.start_main_~y~0#1| 1) (= |ULTIMATE.start_main_~x~0#1| 0))' at error location [2024-11-09 06:36:14,620 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 06:36:14,621 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 06:36:14,621 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [101, 101, 101] total 202 [2024-11-09 06:36:14,621 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1980230478] [2024-11-09 06:36:14,621 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 06:36:14,622 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 203 states [2024-11-09 06:36:14,622 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 06:36:14,629 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 203 interpolants. [2024-11-09 06:36:14,635 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20530, Invalid=24202, Unknown=0, NotChecked=0, Total=44732 [2024-11-09 06:36:14,635 INFO L87 Difference]: Start difference. First operand 261 states and 267 transitions. Second operand has 203 states, 203 states have (on average 2.0591133004926108) internal successors, (418), 202 states have internal predecessors, (418), 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 06:36:16,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 06:36:16,109 INFO L93 Difference]: Finished difference Result 524 states and 636 transitions. [2024-11-09 06:36:16,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 202 states. [2024-11-09 06:36:16,110 INFO L78 Accepts]: Start accepts. Automaton has has 203 states, 203 states have (on average 2.0591133004926108) internal successors, (418), 202 states have internal predecessors, (418), 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 257 [2024-11-09 06:36:16,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 06:36:16,113 INFO L225 Difference]: With dead ends: 524 [2024-11-09 06:36:16,113 INFO L226 Difference]: Without dead ends: 463 [2024-11-09 06:36:16,117 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 870 GetRequests, 660 SyntacticMatches, 0 SemanticMatches, 210 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3109 ImplicationChecksByTransitivity, 21.2s TimeCoverageRelationStatistics Valid=20530, Invalid=24202, Unknown=0, NotChecked=0, Total=44732 [2024-11-09 06:36:16,118 INFO L432 NwaCegarLoop]: 21 mSDtfsCounter, 2 mSDsluCounter, 76 mSDsCounter, 0 mSdLazyCounter, 415 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 97 SdHoareTripleChecker+Invalid, 417 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 415 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-11-09 06:36:16,119 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 97 Invalid, 417 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 415 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-11-09 06:36:16,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 463 states. [2024-11-09 06:36:16,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 463 to 463. [2024-11-09 06:36:16,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 463 states, 462 states have (on average 1.0151515151515151) internal successors, (469), 462 states have internal predecessors, (469), 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 06:36:16,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 463 states to 463 states and 469 transitions. [2024-11-09 06:36:16,150 INFO L78 Accepts]: Start accepts. Automaton has 463 states and 469 transitions. Word has length 257 [2024-11-09 06:36:16,150 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 06:36:16,151 INFO L471 AbstractCegarLoop]: Abstraction has 463 states and 469 transitions. [2024-11-09 06:36:16,151 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 203 states, 203 states have (on average 2.0591133004926108) internal successors, (418), 202 states have internal predecessors, (418), 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 06:36:16,152 INFO L276 IsEmpty]: Start isEmpty. Operand 463 states and 469 transitions. [2024-11-09 06:36:16,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 460 [2024-11-09 06:36:16,174 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 06:36:16,175 INFO L215 NwaCegarLoop]: trace histogram [200, 200, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 06:36:16,206 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d62882a-abfe-4836-ac0c-7372735f477e/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2024-11-09 06:36:16,375 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d62882a-abfe-4836-ac0c-7372735f477e/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2024-11-09 06:36:16,376 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 06:36:16,376 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 06:36:16,376 INFO L85 PathProgramCache]: Analyzing trace with hash 1967810445, now seen corresponding path program 10 times [2024-11-09 06:36:16,376 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 06:36:16,376 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2064577898] [2024-11-09 06:36:16,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:36:16,377 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 06:36:16,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:36:52,767 INFO L134 CoverageAnalysis]: Checked inductivity of 40485 backedges. 0 proven. 40000 refuted. 0 times theorem prover too weak. 485 trivial. 0 not checked. [2024-11-09 06:36:52,767 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 06:36:52,767 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2064577898] [2024-11-09 06:36:52,768 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2064577898] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 06:36:52,768 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1158266199] [2024-11-09 06:36:52,768 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-09 06:36:52,768 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 06:36:52,769 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d62882a-abfe-4836-ac0c-7372735f477e/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 06:36:52,771 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d62882a-abfe-4836-ac0c-7372735f477e/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 06:36:52,775 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d62882a-abfe-4836-ac0c-7372735f477e/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-11-09 06:36:53,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:36:53,669 INFO L255 TraceCheckSpWp]: Trace formula consists of 2283 conjuncts, 202 conjuncts are in the unsatisfiable core [2024-11-09 06:36:53,678 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 06:36:54,395 INFO L134 CoverageAnalysis]: Checked inductivity of 40485 backedges. 0 proven. 40000 refuted. 0 times theorem prover too weak. 485 trivial. 0 not checked. [2024-11-09 06:36:54,395 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 06:37:54,524 INFO L134 CoverageAnalysis]: Checked inductivity of 40485 backedges. 0 proven. 40000 refuted. 0 times theorem prover too weak. 485 trivial. 0 not checked. [2024-11-09 06:37:54,524 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1158266199] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 06:37:54,524 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1394461199] [2024-11-09 06:37:54,526 INFO L159 IcfgInterpreter]: Started Sifa with 17 locations of interest [2024-11-09 06:37:54,526 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 06:37:54,527 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 06:37:54,527 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 06:37:54,527 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 06:37:54,736 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 06:37:56,000 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '13829#(and (<= (+ (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) (+ |ULTIMATE.start_main_~#a~0#1.offset| 4)) 1) (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) |ULTIMATE.start_main_~#a~0#1.offset|)) (= |ULTIMATE.start_main_~y~0#1| 1) (= |ULTIMATE.start_main_~x~0#1| 0))' at error location [2024-11-09 06:37:56,000 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 06:37:56,000 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 06:37:56,001 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [202, 202, 202] total 404 [2024-11-09 06:37:56,001 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [659993594] [2024-11-09 06:37:56,001 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 06:37:56,002 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 405 states [2024-11-09 06:37:56,003 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 06:37:56,024 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 405 interpolants. [2024-11-09 06:37:56,034 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81837, Invalid=89145, Unknown=0, NotChecked=0, Total=170982 [2024-11-09 06:37:56,036 INFO L87 Difference]: Start difference. First operand 463 states and 469 transitions. Second operand has 405 states, 405 states have (on average 2.0296296296296297) internal successors, (822), 404 states have internal predecessors, (822), 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 06:38:01,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 06:38:01,788 INFO L93 Difference]: Finished difference Result 928 states and 1141 transitions. [2024-11-09 06:38:01,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 404 states. [2024-11-09 06:38:01,789 INFO L78 Accepts]: Start accepts. Automaton has has 405 states, 405 states have (on average 2.0296296296296297) internal successors, (822), 404 states have internal predecessors, (822), 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 459 [2024-11-09 06:38:01,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 06:38:01,795 INFO L225 Difference]: With dead ends: 928 [2024-11-09 06:38:01,795 INFO L226 Difference]: Without dead ends: 867 [2024-11-09 06:38:01,805 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 1577 GetRequests, 1165 SyntacticMatches, 0 SemanticMatches, 412 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6240 ImplicationChecksByTransitivity, 81.6s TimeCoverageRelationStatistics Valid=81837, Invalid=89145, Unknown=0, NotChecked=0, Total=170982 [2024-11-09 06:38:01,806 INFO L432 NwaCegarLoop]: 21 mSDtfsCounter, 2 mSDsluCounter, 171 mSDsCounter, 0 mSdLazyCounter, 834 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 192 SdHoareTripleChecker+Invalid, 836 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 834 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2024-11-09 06:38:01,806 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 192 Invalid, 836 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 834 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2024-11-09 06:38:01,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 867 states. [2024-11-09 06:38:01,842 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 867 to 867. [2024-11-09 06:38:01,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 867 states, 866 states have (on average 1.008083140877598) internal successors, (873), 866 states have internal predecessors, (873), 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 06:38:01,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 867 states to 867 states and 873 transitions. [2024-11-09 06:38:01,848 INFO L78 Accepts]: Start accepts. Automaton has 867 states and 873 transitions. Word has length 459 [2024-11-09 06:38:01,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 06:38:01,849 INFO L471 AbstractCegarLoop]: Abstraction has 867 states and 873 transitions. [2024-11-09 06:38:01,850 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 405 states, 405 states have (on average 2.0296296296296297) internal successors, (822), 404 states have internal predecessors, (822), 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 06:38:01,851 INFO L276 IsEmpty]: Start isEmpty. Operand 867 states and 873 transitions. [2024-11-09 06:38:01,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 864 [2024-11-09 06:38:01,887 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 06:38:01,887 INFO L215 NwaCegarLoop]: trace histogram [402, 402, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 06:38:01,918 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d62882a-abfe-4836-ac0c-7372735f477e/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2024-11-09 06:38:02,088 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d62882a-abfe-4836-ac0c-7372735f477e/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2024-11-09 06:38:02,088 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 06:38:02,088 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 06:38:02,089 INFO L85 PathProgramCache]: Analyzing trace with hash -1822571457, now seen corresponding path program 11 times [2024-11-09 06:38:02,089 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 06:38:02,089 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [385821205] [2024-11-09 06:38:02,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:38:02,089 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 06:38:03,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:40:34,826 INFO L134 CoverageAnalysis]: Checked inductivity of 162089 backedges. 0 proven. 161604 refuted. 0 times theorem prover too weak. 485 trivial. 0 not checked. [2024-11-09 06:40:34,827 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 06:40:34,827 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [385821205] [2024-11-09 06:40:34,827 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [385821205] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 06:40:34,827 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1813780681] [2024-11-09 06:40:34,827 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-09 06:40:34,827 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 06:40:34,827 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d62882a-abfe-4836-ac0c-7372735f477e/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 06:40:34,829 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d62882a-abfe-4836-ac0c-7372735f477e/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 06:40:34,830 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d62882a-abfe-4836-ac0c-7372735f477e/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-11-09 06:45:12,871 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 24 check-sat command(s) [2024-11-09 06:45:12,871 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 06:45:12,963 INFO L255 TraceCheckSpWp]: Trace formula consists of 513 conjuncts, 27 conjuncts are in the unsatisfiable core [2024-11-09 06:45:12,982 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 06:45:18,306 INFO L134 CoverageAnalysis]: Checked inductivity of 162089 backedges. 403 proven. 484 refuted. 0 times theorem prover too weak. 161202 trivial. 0 not checked. [2024-11-09 06:45:18,307 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 06:45:23,939 INFO L134 CoverageAnalysis]: Checked inductivity of 162089 backedges. 1 proven. 484 refuted. 0 times theorem prover too weak. 161604 trivial. 0 not checked. [2024-11-09 06:45:23,939 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1813780681] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 06:45:23,940 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1357071296] [2024-11-09 06:45:23,942 INFO L159 IcfgInterpreter]: Started Sifa with 17 locations of interest [2024-11-09 06:45:23,942 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 06:45:23,942 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 06:45:23,943 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 06:45:23,943 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 06:45:24,143 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 06:45:26,662 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '22144#(and (<= (+ (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) (+ |ULTIMATE.start_main_~#a~0#1.offset| 4)) 1) (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) |ULTIMATE.start_main_~#a~0#1.offset|)) (= |ULTIMATE.start_main_~y~0#1| 1) (= |ULTIMATE.start_main_~x~0#1| 0))' at error location [2024-11-09 06:45:26,662 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 06:45:26,662 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 06:45:26,664 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [404, 26, 25] total 452 [2024-11-09 06:45:26,664 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1104268733] [2024-11-09 06:45:26,664 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 06:45:26,666 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 452 states [2024-11-09 06:45:26,666 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 06:45:26,680 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 452 interpolants. [2024-11-09 06:45:26,693 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83367, Invalid=127773, Unknown=0, NotChecked=0, Total=211140 [2024-11-09 06:45:26,695 INFO L87 Difference]: Start difference. First operand 867 states and 873 transitions. Second operand has 452 states, 452 states have (on average 2.0376106194690267) internal successors, (921), 452 states have internal predecessors, (921), 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 06:45:34,426 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 06:45:34,426 INFO L93 Difference]: Finished difference Result 979 states and 1015 transitions. [2024-11-09 06:45:34,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 452 states. [2024-11-09 06:45:34,428 INFO L78 Accepts]: Start accepts. Automaton has has 452 states, 452 states have (on average 2.0376106194690267) internal successors, (921), 452 states have internal predecessors, (921), 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 863 [2024-11-09 06:45:34,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 06:45:34,434 INFO L225 Difference]: With dead ends: 979 [2024-11-09 06:45:34,435 INFO L226 Difference]: Without dead ends: 918 [2024-11-09 06:45:34,448 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 2991 GetRequests, 2533 SyntacticMatches, 0 SemanticMatches, 458 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22310 ImplicationChecksByTransitivity, 93.5s TimeCoverageRelationStatistics Valid=83367, Invalid=127773, Unknown=0, NotChecked=0, Total=211140 [2024-11-09 06:45:34,449 INFO L432 NwaCegarLoop]: 19 mSDtfsCounter, 5 mSDsluCounter, 188 mSDsCounter, 0 mSdLazyCounter, 957 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 207 SdHoareTripleChecker+Invalid, 959 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 957 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2024-11-09 06:45:34,449 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 207 Invalid, 959 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 957 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2024-11-09 06:45:34,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 918 states. [2024-11-09 06:45:34,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 918 to 917. [2024-11-09 06:45:34,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 917 states, 916 states have (on average 1.00764192139738) internal successors, (923), 916 states have internal predecessors, (923), 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 06:45:34,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 917 states to 917 states and 923 transitions. [2024-11-09 06:45:34,491 INFO L78 Accepts]: Start accepts. Automaton has 917 states and 923 transitions. Word has length 863 [2024-11-09 06:45:34,492 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 06:45:34,493 INFO L471 AbstractCegarLoop]: Abstraction has 917 states and 923 transitions. [2024-11-09 06:45:34,493 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 452 states, 452 states have (on average 2.0376106194690267) internal successors, (921), 452 states have internal predecessors, (921), 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 06:45:34,493 INFO L276 IsEmpty]: Start isEmpty. Operand 917 states and 923 transitions. [2024-11-09 06:45:34,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 914 [2024-11-09 06:45:34,503 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 06:45:34,504 INFO L215 NwaCegarLoop]: trace histogram [403, 403, 46, 46, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 06:45:34,554 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d62882a-abfe-4836-ac0c-7372735f477e/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2024-11-09 06:45:34,704 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d62882a-abfe-4836-ac0c-7372735f477e/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2024-11-09 06:45:34,704 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 06:45:34,705 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 06:45:34,705 INFO L85 PathProgramCache]: Analyzing trace with hash 305432412, now seen corresponding path program 12 times [2024-11-09 06:45:34,705 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 06:45:34,705 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [925677758] [2024-11-09 06:45:34,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:45:34,705 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 06:45:36,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:48:07,147 INFO L134 CoverageAnalysis]: Checked inductivity of 164526 backedges. 0 proven. 162409 refuted. 0 times theorem prover too weak. 2117 trivial. 0 not checked. [2024-11-09 06:48:07,148 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 06:48:07,148 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [925677758] [2024-11-09 06:48:07,148 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [925677758] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 06:48:07,148 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2048594069] [2024-11-09 06:48:07,148 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-09 06:48:07,148 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 06:48:07,148 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d62882a-abfe-4836-ac0c-7372735f477e/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 06:48:07,150 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d62882a-abfe-4836-ac0c-7372735f477e/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 06:48:07,154 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d62882a-abfe-4836-ac0c-7372735f477e/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-11-09 06:48:08,623 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-09 06:48:08,623 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 06:48:08,656 INFO L255 TraceCheckSpWp]: Trace formula consists of 4553 conjuncts, 405 conjuncts are in the unsatisfiable core [2024-11-09 06:48:08,678 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 06:48:09,896 INFO L134 CoverageAnalysis]: Checked inductivity of 164526 backedges. 0 proven. 162409 refuted. 0 times theorem prover too weak. 2117 trivial. 0 not checked. [2024-11-09 06:48:09,897 INFO L311 TraceCheckSpWp]: Computing backward predicates...